Coco Roms: bas11.s annotate

annotate bas11.s @ 1:704b2c9dc19e default tip

Remove extraneous unused and incorrect definition

author	William Astle <lost@l-w.ca>
date	Wed, 02 Jan 2019 10:11:19 -0700
parents	605ff82c4618
children

rev	line source
0 605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1 *pragma nolist
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2 include defs.s
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3 *pragma list
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	5 ; COLOR BASIC ROM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	6 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	7 org BASIC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	8 ; This is the official set of ROM entry points. It is unfortunate that the generic input ("console in") routine is not exposed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	9 ; here. It is also unfortunate that no open and close file routines are exposed. This and other oversignts led to a lot of
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	10 ; software either having to re-invent the wheel or calling directly into the ROM instead of via these official entry points.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	11 POLCAT fdb KEYIN ; indirect jump, get a keystroke
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	12 CHROUT fdb PUTCHR ; indirect jump, output character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	13 CSRDON fdb CASON ; indirect jump, turn cassette on and start reading
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	14 BLKIN fdb GETBLK ; indirect jump, read a block from tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	15 BLKOUT fdb SNDBLK ; indirect jump, write a block to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	16 JOYIN fdb GETJOY ; indirect jump, read joystick axes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	17 WRTLDR fdb WRLDR ; indirect jump, turn cassette on and write a leader
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	18 ; Initialization code.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	19 LA00E lds #LINBUF+LBUFMX+1 ; put the stack in the line input buffer which is a safe place for now
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	20 lda #0x37 ; enable the cartidge interrupt (to detect autostarting cartridges)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	21 sta PIA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	22 lda RSTFLG ; get warm start flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	23 cmpa #0x55 ; is it valid?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	24 bne BACDST ; brif not - cold start
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	25 ldx RSTVEC ; get warm start routine pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	26 lda ,x ; get first byte of the routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	27 cmpa #0x12 ; is it NOP?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	28 bne BACDST ; brif not - the routine is invalid so do a cold start
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	29 jmp ,x ; transfer control to the warm start routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	30 ; RESET/power on comes here
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	31 RESVEC leay LA00E,pcr ; point to warm start check code
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	32 LA02A ldx #PIA1 ; point to PIA1 - we're going to rely on the mirroring to reach PIA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	33 clr -3,x ; set PIA0 DA to direction mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	34 clr -1,x ; set PIA0 DB to direction mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	35 clr -4,x ; set PIA0 DA to inputs
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	36 ldd #0xff34
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	37 sta -2,x ; set PIA0 DB to outputs
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	38 stb -3,x ; set PIA0 DA to data mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	39 stb -1,x ; set PIA0 DB to data mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	40 clr 1,x ; set PIA1 DA to direction mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	41 clr 3,x ; set PIA1 DB to direction mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	42 deca
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	43 sta ,x ; set PIA1 DA bits 7-1 as output, 0 as input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	44 lda #0xf8 ; set PIA1 DB bits 7-3 as output, 2-0 as input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	45 sta 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	46 stb 1,x ; set PIA1 DA to data mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	47 stb 3,x ; set PIA1 DB to data mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	48 clr 2,x ; set VDG to alpha-numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	49 ldb #2 ; make RS232 marking ("stop" bit)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	50 stb ,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	51 ldu #SAMREG ; point to SAM register
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	52 ldb #16 ; 16 bits to clear
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	53 LA056 sta ,u++ ; clear a bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	54 decb ; done all?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	55 bne LA056 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	56 sta SAMREG+9 ; put display at 0x400
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	57 tfr b,dp ; set direct page to 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	58 ldb #4 ; use as a mask to check RAMSZ input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	59 sta -2,x ; set RAMSZ strobe high
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	60 bitb 2,x ; check RAMSZ input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	61 beq LA072 ; brif set for 4K RAMs
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	62 clr -2,x ; set strobe low
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	63 bitb 2,x ; check input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	64 beq LA070 ; brif set for 64K rams
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	65 leau -2,u ; adjust pointer to set SAM for 16K RAMs
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	66 LA070 sta -3,u ; program SAM for either 16K or 64K RAMs
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	67 LA072 jmp ,y ; transfer control to startup routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	68 ; Cold start jumps here
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	69 BACDST ldx #VIDRAM+1 ; point past the top of the first 1K of memory (for double predec below)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	70 LA077 clr ,--x ; clear a byte (last will actually try clearing LSB of RESET vector in ROM)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	71 leax 1,x ; move forward one byte (will set Z if we're done)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	72 bne LA077 ; brif not donw yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	73 jsr LA928 ; clear the screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	74 clr ,x+ ; put the constant zero that lives before the program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	75 stx TXTTAB ; set beginning of program storage
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	76 LA084 lda 2,x ; get value from memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	77 coma ; make it different
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	78 sta 2,x ; try putting different into memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	79 cmpa 2,x ; did it matcH?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	80 bne LA093 ; brif not - we found the end of memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	81 leax 1,x ; move pointer forward
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	82 com 1,x ; restore the original memory contents
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	83 bra LA084 ; try another byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	84 LA093 stx TOPRAM ; save top of memory (one below actual top because we need a byte for VAL() to work)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	85 stx MEMSIZ ; save top of string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	86 stx STRTAB ; set bottom of allocated string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	87 leax -200,x ; allocate 200 bytes of string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	88 stx FRETOP ; set top of actually free memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	89 tfr x,s ; put the stack there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	90 ldx #LA10D ; point to variable initializer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	91 ldu #CMPMID ; point to variables to initialize (first batch)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	92 ldb #28 ; 28 bytes in first batch
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	93 jsr LA59A ; copy bytes to variables
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	94 ldu #IRQVEC ; point to variables to initialize (second batch)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	95 ldb #30 ; 30 bytes this time
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	96 jsr LA59A ; copy bytes to variables
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	97 ldx -12,x ; get SN error address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	98 stx 3,u ; set ECB's command handlers to error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	99 stx 8,u
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	100 ldx #RVEC0 ; point to RAM vectors
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	101 ldd #0x394b ; write 75 RTS opcodes (25 RAM vectors)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	102 LA0C0 sta ,x+ ; put an RTS
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	103 decb ; done?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	104 bne LA0C0 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	105 sta LINHDR-1 ; make temporary line header data for line encoding have a nonzero next line pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	106 jsr LAD19 ; do a "NEW"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	107 ldx #'E*256+'X ; magic number to detect ECB ROM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	108 cmpx EXBAS ; is there an ECB ROM?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	109 lbeq EXBAS+2 ; brif so - launch it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	110 andcc #0xaf ; start interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	111 ldx #LA147-1 ; point to sign on message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	112 jsr LB99C ; print it out
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	113 ldx #BAWMST ; warm start routine address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	114 stx RSTVEC ; set vector there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	115 lda #0x55 ; warm start valid flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	116 sta RSTFLG ; mark warm start valid
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	117 bra LA0F3 ; go to direct mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	118 ; Warm start entry point
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	119 BAWMST nop ; valid routine marker
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	120 clr DEVNUM ; reset output/input to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	121 jsr LAD33 ; do a partial NEW
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	122 andcc #0xaf ; start interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	123 jsr LA928 ; clear the screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	124 LA0F3 jmp LAC73 ; go to direct mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	125 ; FIRQ service routine - this handles starting autostart cartridges
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	126 BFRQSV tst PIA1+3 ; is it the cartridge interrupt?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	127 bmi LA0FC ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	128 rti
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	129 LA0FC jsr LA7D1 ; delay for a while
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	130 jsr LA7D1 ; delay for another while
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	131 leay <LA108,pcr ; point to cartridge starter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	132 jmp LA02A ; go initialize everything clean for the cartridge
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	133 LA108 clr RSTFLG ; force a cold start a cartridge reset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	134 jmp ROMPAK ; transfer control to the cartridge
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	135 ; Variable initializers (first batch)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	136 LA10D fcb 18 ; mid band partition of the 1200/2400 Hz period
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	137 fcb 24 ; upper limit of 1200 Hz period
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	138 fcb 10 ; upper limit of 2400 Hz period
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	139 fdb 128 ; number of 0x55s for cassette leader
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	140 fcb 11 ; cursor blink delay
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	141 fdb 87 ; 600 baud delay constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	142 fdb 1 ; printer carriage return delay constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	143 fcb 16 ; printer tab field width
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	144 fcb 112 ; last printer tab zone
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	145 fcb 132 ; printer carriage width
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	146 fcb 0 ; printer carriage position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	147 fdb LB44A ; default execution address for EXEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	148 inc CHARAD+1 ;* character fetching routines (DP portion) - we first do a two
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	149 bne LA123 ;* two stage increment of CHARAD then load the value into A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	150 inc CHARAD ;* before transferring control to the bottom half routine in ROM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	151 LA123 lda >0 ; NOTE: the 0 is a placeholder, extended addressing is required
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	152 jmp BROMHK
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	153 ; Variable initializers (second batch)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	154 jmp BIRQSV ; IRQ handler
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	155 jmp BFRQSV ; FIRQ handler
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	156 jmp LB44A ; default USR() address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	157 fcb 0x80,0x4f,0xc7,0x52,0x59 ; random seed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	158 fcb 0xff ; capslock flag - default to upper case
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	159 fdb DEBDEL ; keyboard debounce delay (why is it a variable?)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	160 jmp LB277 ; exponentiation handler vector
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	161 fcb 53 ; (command interpretation table) 53 commands
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	162 fdb LAA66 ; (command interpretation table) reserved words list (commands)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	163 fdb LAB67 ; (command interpretation table) jump table (commands)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	164 fcb 20 ; (command interpretation table) 20 functions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	165 fdb LAB1A ; (command interpretation table) reserved words list (functions)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	166 fdb LAA29 ; (command interpretation table) jump table (functions)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	167 ; This is the signon message.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	168 LA147 fcc 'COLOR BASIC 1.1'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	169 fcb 0x0d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	170 fcc '(C) 1980 TANDY'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	171 fcb 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	172 ; This is the "invalid colour" CLS easter egg text. Basically 11 wasted bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	173 LA166 fcc 'MICROSOFT'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	174 fcb 0x0d,0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	175 ; Read a character from current device and mask off bit 7 (keep it as 7 bit ASCII)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	176 LA171 bsr LA176 ; get character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	177 anda #0x7f ; mask off high bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	178 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	179 ; Generic read routine. Reads a character from the device specified by DEVNUM. If no input was available,
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	180 ; CINBFL will bet nonzero (on EOF). If input was available, CINBFL will be zero. Note that this routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	181 ; has undefined results when called on an output only device. All registers except CC and A are preserved.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	182 LA176 jsr RVEC4 ; do RAM hook
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	183 clr CINBFL ; flag data available
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	184 tst DEVNUM ; is it keyboard?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	185 beq LA1B1 ; brif so - blink cursor and wait for key press
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	186 tst CINCTR ; is there anything in cassette input buffer?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	187 bne LA186 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	188 com CINBFL ; flag EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	189 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	190 ; Read character from cassette file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	191 LA186 pshs u,y,x,b ; preserve registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	192 ldx CINPTR ; get input buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	193 lda ,x+ ; get character from buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	194 pshs a ; save it for return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	195 stx CINPTR ; save new input buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	196 dec CINCTR ; count character just consumed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	197 bne LA197 ; brif buffer is not empty yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	198 jsr LA635 ; go read another block, if any, to refill the buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	199 LA197 puls a,b,x,y,u,pc ; restore registers and return the character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	200 ; Blink the cursor. This might be better timed via an interrupt or something.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	201 LA199 dec BLKCNT ; is it time to blink the cursor?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	202 bne LA1AB ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	203 ldb #11 ; reset blink timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	204 stb BLKCNT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	205 ldx CURPOS ; get cursor position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	206 lda ,x ; get character at the cursor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	207 adda #0x10 ; move to next color
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	208 ora #0x8f ; make sure it's a grahpics block with all elements lit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	209 sta ,x ; put new cursor block on screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	210 LA1AB ldx #DEBDEL ; we'll use the debounce delay for the cursor blink timer (10ms)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	211 LA1AE jmp LA7D3 ; go count X down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	212 ; Blink cursor while waiting for a key press
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	213 LA1B1 pshs x,b ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	214 LA1B3 bsr LA199 ; go do a cursor iteration
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	215 bsr KEYIN ; go read a key
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	216 beq LA1B3 ; brif no key pressed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	217 ldb #0x60 ; VDG screen space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	218 stb [CURPOS] ; blank cursor out
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	219 LA1BF puls b,x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	220 ; This is the actual keyboard polling routine. Returns 0 if no new key is down. Updated compared to 1.0 to reject
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	221 ; joystick buttons.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	222 KEYIN pshs u,x,b ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	223 bsr LA1C8 ; get keystroke
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	224 tsta ; set flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	225 puls b,x,u,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	226 LA1C8 ldu #PIA0 ; point to keyboard PIA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	227 ldx #KEYBUF ; point to state table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	228 clra ; clear carry and set column strobe and counter to 0xff
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	229 deca
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	230 pshs x,a ; save colomn counter and a couple of holes for temporaries
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	231 sta 2,u ; initialize the column strobe to no columns active
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	232 skip1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	233 LA1D5 comb ; set carry flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	234 rol 2,u ; move to nextcolumn
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	235 bcc LA1BF ; brif we've done the last one
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	236 inc 0,s ; bump column count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	237 bsr LA239 ; read keyboard row data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	238 sta 1,s ; save key data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	239 eora ,x ; set any bit where a key state changed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	240 anda ,x ; ignore any where a key was released
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	241 ldb 1,s ; get new key data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	242 stb ,x+ ; save in state table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	243 tsta ; was a key down?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	244 beq LA1D5 ; brif not - check another
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	245 ldb 2,u ; get column strobe data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	246 stb 2,s ; save it for later
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	247 ldb #0xf8 ; make sure B is 0 after first ADDB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	248 LA1F1 addb #8 ; adjust to next row
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	249 lsra ; are we at the right row base?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	250 bcc LA1F1 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	251 addb 0,s ; add in column number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	252 beq LA244 ; brif it was @
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	253 cmpb #26 ; letter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	254 bhi LA246 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	255 orb #0x40 ; add in upper case ASCII bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	256 bsr LA22E ; check for shift key
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	257 beq LA20B ; brif shift down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	258 lda CASFLG ; check casplock
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	259 bne LA20B ; brif not caps mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	260 orb #0x20 ; convert to lower case
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	261 LA20B stb 0,s ; temp store ASCII value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	262 ldx DEBVAL ; get debounce dely counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	263 jsr LA7D3 ; wait while we count X down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	264 ldb #0xff ; set column strobe to no columns
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	265 bsr LA237 ; read keyboard data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	266 inca ; do we have anything reading?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	267 bne LA220 ; brif so - reject keyboard read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	268 LA21A ldb 2,s ; get saved column strobe
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	269 bsr LA237 ; read the keyboard data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	270 cmpa 1,s ; does it match the result before the delay?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	271 LA220 puls a ; get back return value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	272 bne LA22B ; brif we have a non-match or joystick button
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	273 cmpa #0x12 ; SHIFT-0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	274 bne LA22C ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	275 com CASFLG ; swap capslock state
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	276 LA22B clra ; set Z and return zero for no key down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	277 LA22C puls x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	278 LA22E lda #0x7f ; column strobe for SHIFT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	279 sta 2,u ; strobe keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	280 lda ,u ; get row data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	281 anda #0x40 ; only keep shift state
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	282 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	283 LA237 stb 2,u ; save requested column strobe
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	284 LA239 lda ,u ; read row data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	285 ora #0x80 ; mask joystick comparator input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	286 tst 2,u ; are we reading column 7?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	287 bmi LA243 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	288 ora #0xc0 ; also mask off the SHIFT key
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	289 LA243 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	290 LA244 ldb #51 ; scan code for @
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	291 LA246 ldx #CONTAB-0x36 ; point to first batch in control code list
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	292 cmpb #33 ; arrows, space, zero?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	293 blo LA263 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	294 ldx #CONTAB-0x54 ; point to second batch in control code list
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	295 cmpb #48 ; ENTER, CLEAR, BREAK, @?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	296 bhs LA263 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	297 bsr LA22E ; get shift status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	298 cmpb #43 ; number, colon, semicolon?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	299 bls LA25C ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	300 eora #0x40 ; invert shift sense if so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	301 LA25C tsta ; test shift status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	302 beq LA20B ; brif shift down - we have the code so check for debounce
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	303 addb #0x10 ; add in ASCII offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	304 bra LA20B ; check for debounce
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	305 LA263 aslb ; two entries for table entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	306 bsr LA22E ; get shift status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	307 bne LA269 ; brif not down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	308 incb ; move to shifted code entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	309 LA269 ldb b,x ; get ASCII code
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	310 bra LA20B ; go check for debounce
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	311 fcb 0 ; unused in Color Basic 1.0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	312 CONTAB fcb 0x5e,0x5f ; <UP> (^, _)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	313 fcb 0x0a,0x5b ; <DOWN> (LF, [)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	314 fcb 0x08,0x15 ; <LEFT> (BS, ^U)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	315 fcb 0x09,0x5d ; <RIGHT> (TAB, ])
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	316 fcb 0x20,0x20 ; <SPACE>
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	317 fcb 0x30,0x12 ; <0> (0, ^R)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	318 fcb 0x0d,0x0d ; <ENTER> (CR, CR)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	319 fcb 0x0c,0x5c ; <CLEAR> (FF, \)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	320 fcb 0x03,0x03 ; <BREAK> (^C, ^C)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	321 fcb 0x40,0x13 ; <@> (@, ^S)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	322 ; Generic output routine.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	323 ; Output character in A to the device specified by DEVNUM. All registers are preserved except CC.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	324 ; Sending output to a device that does not support output is undefined.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	325 PUTCHR jsr RVEC3 ; call RAM hook
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	326 pshs b ; save B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	327 ldb DEVNUM ; get desired device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	328 incb ; set flags (Z for -1, etc.)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	329 puls b ; restore B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	330 bmi LA2BF ; brif < -1 (line printer)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	331 bne LA30A ; brif > -1 (screen)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	332 ; Write character to tape file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	333 pshs x,b,a ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	334 ldb FILSTA ; get file status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	335 decb ; input file?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	336 beq LA2A6 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	337 ldb CINCTR ; get character count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	338 incb ; account for this character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	339 bne LA29E ; brif buffer not full
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	340 bsr LA2A8 ; write previously full block to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	341 LA29E ldx CINPTR ; get output buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	342 sta ,x+ ; put character in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	343 stx CINPTR ; save new buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	344 inc CINCTR ; account for this character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	345 LA2A6 puls a,b,x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	346 ; Write a block of data to tape.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	347 LA2A8 ldb #1 ; data block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	348 LA2AA stb BLKTYP ; set block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	349 ldx #CASBUF ; point to output buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	350 stx CBUFAD ; set buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	351 ldb CINCTR ; get number of bytes in the block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	352 stb BLKLEN ; set length to write
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	353 pshs u,y,a ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	354 jsr LA7E5 ; write a block to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	355 puls a,y,u ; restore registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	356 jmp LA650 ; reset buffer pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	357 LA2BF pshs x,b,a,cc ; save registers and interrupt status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	358 orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	359 bsr LA2FB ; set output to marking
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	360 clrb ; transmit a start bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	361 bsr LA2FD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	362 ldb #8 ; send 8 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	363 LA2CA pshs b ; save bit counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	364 clrb ; set output to
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	365 lsra ; get output bit to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	366 rolb ; get it to the correct bit position for output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	367 aslb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	368 bsr LA2FD ; send the bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	369 puls b ; get back bit counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	370 decb ; sent all 8 bits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	371 bne LA2CA ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	372 bsr LA2FB ; send stop bit (B is 0)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	373 puls cc,a ; restore interrupts and output character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	374 cmpa #0x0d ; carriage return?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	375 beq LA2E7 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	376 inc LPTPOS ; bump printer position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	377 ldb LPTPOS ; get current printer position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	378 cmpb LPTWID ; end of line?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	379 blo LA2ED ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	380 LA2E7 clr LPTPOS ; reset to start of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	381 bsr LA305 ; delay for carriage return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	382 bsr LA305
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	383 LA2ED ldb PIA1+2 ; get rs232 status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	384 lsrb ; is it "read"?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	385 bcs LA2ED ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	386 puls b,x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	387 fdb 0,0,0 ; unused space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	388 LA2FB ldb #2 ; set output to high (marking)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	389 LA2FD stb PIA1 ; set RS232 output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	390 bsr LA302 ; do baud delay (first iteration) then fall through for second
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	391 LA302 ldx LPTBTD ; get buard rate delay constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	392 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	393 LA305 ldx LPTLND ; get carriage return delay constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	394 jmp LA7D3 ; count X down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	395 ; Output character to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	396 LA30A pshs x,b,a ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	397 ldx CURPOS ; get cursor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	398 cmpa #0x08 ; backspace?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	399 bne LA31D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	400 cmpx #VIDRAM ; at top of screen?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	401 beq LA35D ; brif so - it's a no-op
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	402 lda #0x60 ; VDG space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	403 sta ,-x ; put a space at previous location and move pointer back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	404 bra LA344 ; save new cursor position and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	405 LA31D cmpa #0x0d ; carriage return?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	406 bne LA32F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	407 ldx CURPOS ; get cursor pointer (why? we already have it)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	408 LA323 lda #0x60 ; VDG space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	409 sta ,x+ ; put output space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	410 tfr x,d ; see if we at a multiple of 32 now
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	411 bitb #0x1f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	412 bne LA323 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	413 bra LA344 ; go check for scrolling
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	414 LA32F cmpa #0x20 ; control character?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	415 blo LA35D ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	416 tsta ; is it graphics block?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	417 bmi LA342 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	418 cmpa #0x40 ; number or special?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	419 blo LA340 ; brif so (flip "case" bit)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	420 cmpa #0x60 ; upper case alpha?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	421 blo LA342 ; brif so - keep it unmodified
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	422 anda #0xdf ; clear bit 5 (inverse video)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	423 LA340 eora #0x40 ; flip inverse video bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	424 LA342 sta ,x+ ; output character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	425 LA344 stx CURPOS ; save new cursor position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	426 cmpx #VIDRAM+511 ; end of screen?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	427 bls LA35D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	428 ldx #VIDRAM ; point to start of screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	429 LA34E ldd 32,x ; get two characters from next row
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	430 std ,x++ ; put them on this row
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	431 cmpx #VIDRAM+0x1e0 ; at start of last row on screen?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	432 blo LA34E ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	433 ldb #0x60 ; VDG space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	434 jsr LA92D ; blank out last line (borrow CLS's loop)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	435 LA35D puls a,b,x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	436 ; Set up device parameters for output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	437 LA35F jsr RVEC2 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	438 pshs x,b,a ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	439 clr PRTDEV ; flag device as a screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	440 lda DEVNUM ; get devicenumber
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	441 beq LA373 ; brif screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	442 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	443 beq LA384 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	444 ldx LPTCFW ; get tab width and last tab stop for printer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	445 ldd LPTWID ; get line width and current position for printer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	446 bra LA37C ; set parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	447 LA373 ldb CURPOS+1 ; get LSB of cursor position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	448 andb #0x1f ; now we have the offset into the line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	449 ldx #0x1010 ; 16 character tab, position 16 is last tab stop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	450 lda #32 ; screen is 32 characters wide
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	451 LA37C stx DEVCFW ; save tab width and last tab stop for active device
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	452 stb DEVPOS ; save line position for current device
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	453 sta DEVWID ; save line width for current device
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	454 puls a,b,x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	455 LA384 com PRTDEV ; flag device as non-display
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	456 ldx #0x0100 ; tab width is 1, last tab field is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	457 clra ; line width is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	458 clrb ; character position on line is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	459 bra LA37C ; go set parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	460 ; This is the line input routine used for reading lines for Basic, both in immediate mode and for
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	461 ; INPUT and LINE INPUT. Exit with C set if terminated by BREAK and C clear if terminated by ENTER.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	462 ; The actualy entry point is LA390. Note that this routine echoes to all devices.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	463 LA38D jsr LA928 ; clear screen (CLEAR key handling)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	464 LA390 jsr RVEC12 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	465 clr IKEYIM ; reset cached input character from BREAK check
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	466 ldx #LINBUF+1 ; point to line input buffer (input pointer)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	467 ldb #1 ; Number of characters in line (we start at 1 so BS handling is easier)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	468 LA39A jsr LA171 ; get an input character, only keep low 7 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	469 tst CINBFL ; is it EOF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	470 bne LA3CC ; brif EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	471 tst DEVNUM ; is it keyboard input?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	472 bne LA3C8 ; brif not - don't do line editing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	473 cmpa #0x0c ; form feed (CLEAR)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	474 beq LA38D ; brif so - clear screen and reset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	475 cmpa #0x08 ; backspace?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	476 bne LA3B4 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	477 decb ; move back one character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	478 beq LA390 ; brif we were at the start of the line - reset and start again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	479 leax -1,x ; move input pointer back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	480 bra LA3E8 ; echo the backspace and continue
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	481 LA3B4 cmpa #0x15 ; SHIFT-LEFT (kill line)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	482 bne LA3C2 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	483 LA3B8 decb ; at start of line?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	484 beq LA390 ; brif so - reset and restart
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	485 lda #0x08 ; echo a backspace
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	486 jsr PUTCHR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	487 bra LA3B8 ; see if we've erased everything yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	488 LA3C2 cmpa #0x03 ; BREAK?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	489 orcc #1 ; set C if it is (only need Z for the next test
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	490 beq LA3CD ; brif BREAK - exit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	491 LA3C8 cmpa #0x0d ; ENTER (CR)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	492 bne LA3D9 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	493 LA3CC clra ; clear carry (it might not be clear on EOF)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	494 LA3CD pshs cc ; save ENTER/BREAK flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	495 jsr LB958 ; echo a carriage return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	496 clr ,x ; make sure we have a NUL at the end of the buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	497 ldx #LINBUF ; point to input buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	498 puls cc,pc ; restore ENTER/BREAK flag and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	499 LA3D9 cmpa #0x20 ; control character?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	500 blo LA39A ; brif so - skip it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	501 cmpa #'z+1 ; above z?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	502 bhs LA39A ; brif so - ignore it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	503 cmpb #LBUFMX ; is the buffer full?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	504 bhs LA39A ; brif so - ignore extra characters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	505 sta ,x+ ; put character in the buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	506 incb ; bump character count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	507 LA3E8 jsr PUTCHR ; echo character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	508 bra LA39A ; go handle next input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	509 ; Check if DEVNUM Is valid for reading. Raise FM error if open but not for reading. NO error if not open.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	510 LA3ED jsr RVEC5 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	511 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	512 beq LA415 ; brif keyboard - always valid
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	513 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	514 bne LA403 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	515 lda FILSTA ; get tape file status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	516 bne LA400 ; brif file is open
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	517 LA3FB ldb #22*2 ; raise NO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	518 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	519 LA400 deca ; is it in input mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	520 beq LA415 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	521 LA403 jmp LA616 ; raise FM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	522 ; Check if DEVNUM is valid for writing. Raise FM error if open but not for writing. NO error if not open.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	523 LA406 jsr RVEC6 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	524 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	525 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	526 bne LA415 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	527 lda FILSTA ; get file status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	528 beq LA3FB ; brif not open
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	529 deca ; is it open for reading?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	530 beq LA403 ; brif so - bad mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	531 LA415 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	532 ; CLOSE command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	533 CLOSE beq LA426 ; brif no file specified - close all files
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	534 jsr LA5A5 ; parse device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	535 LA41B bsr LA42D ; close specified file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	536 jsr GETCCH ; is there more?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	537 beq LA44B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	538 jsr LA5A2 ; check for comma and parse another device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	539 bra LA41B ; go close this one
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	540 ; Close all files handler.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	541 LA426 jsr RVEC7 ; Yup. The RAM hook dance.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	542 lda #-1 ; start with tape file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	543 sta DEVNUM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	544 ; Close file specified in DEVNUM. Note that this never fails.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	545 LA42D jsr RVEC8 ; You know it. RAM hook.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	546 lda DEVNUM ; get device we're closing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	547 clr DEVNUM ; reset to screen/keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	548 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	549 bne LA44B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	550 lda FILSTA ; get file status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	551 cmpa #2 ; is it output?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	552 bne LA449 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	553 lda CINCTR ; is there anything waiting to be written?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	554 beq LA444 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	555 jsr LA2A8 ; write final block of data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	556 LA444 ldb #0xff ; write EOF block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	557 jsr LA2AA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	558 LA449 clr FILSTA ; mark tape file closed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	559 LA44B rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	560 ; CSAVE command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	561 CSAVE jsr LA578 ; parse filename
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	562 jsr GETCCH ; see what we have after the file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	563 beq LA469 ; brif none
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	564 jsr LB26D ; make sure there's a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	565 ldb #'A ; make sure there's an A after
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	566 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	567 bne LA44B ; brif not end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	568 clra ; file type 0 (basic program)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	569 jsr LA65C ; write out header block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	570 lda #-1 ; set output to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	571 sta DEVNUM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	572 clra ; set Z so we list the whole program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	573 jmp LIST ; go list the program to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	574 LA469 clra ; file type 0 (basic program)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	575 ldx ZERO ; set to binary file mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	576 jsr LA65F ; write header block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	577 clr FILSTA ; close files
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	578 inc BLKTYP ; set block type to data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	579 jsr WRLDR ; write out a leader
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	580 ldx TXTTAB ; point to start of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	581 LA478 stx CBUFAD ; set buffer location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	582 lda #255 ; block size to 255 bytes (max size)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	583 sta BLKLEN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	584 ldd VARTAB ; get end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	585 subd CBUFAD ; how much is left?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	586 beq LA491 ; brif we have nothing left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	587 cmpd #255 ; do we have a full block worth?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	588 bhs LA48C ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	589 stb BLKLEN ; save actual remainder as block length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	590 LA48C jsr SNDBLK ; write a block out
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	591 bra LA478 ; go do another block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	592 LA491 neg BLKTYP ; set block type to 0xff (EOF)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	593 clr BLKLEN ; no data in EOF block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	594 jmp LA7E7 ; write EOF, stop tape, and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	595 ; CLOAD and CLOADM commands
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	596 CLOAD clr FILSTA ; close tape file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	597 cmpa #'M ; is it ClOADM?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	598 beq LA4FE ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	599 leas 2,s ; clean up stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	600 jsr LA5C5 ; parse file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	601 jsr LA648 ; go find the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	602 tst CASBUF+10 ; is it binary?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	603 beq LA4C8 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	604 lda CASBUF+9 ; is it ASCII?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	605 beq LA4CD ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	606 jsr LAD19 ; clear out existing program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	607 lda #-1 ; set up for reading from tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	608 sta DEVNUM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	609 inc FILSTA ; set tape file to input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	610 jsr LA635 ; go read first block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	611 jmp LAC7C ; go to immediate mode to read in the program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	612 ; This is the EOF handler for immediate mode. It's rather assinine for this to be located here. It is
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	613 ; probably an artifact of a substantially different code layout prior to compacting the ROM to fit in
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	614 ; 8K.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	615 LA4BF jsr RVEC13 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	616 jsr LA42D ; close file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	617 jmp LAC73 ; go back to immediate mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	618 LA4C8 lda CASBUF+8 ; get file type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	619 beq LA4D0 ; brif basic program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	620 LA4CD jmp LA616 ; raise FM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	621 LA4D0 jsr LAD19 ; erase existing program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	622 jsr CASON ; start reading tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	623 ldx TXTTAB ; get start of program storage
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	624 LA4D8 stx CBUFAD ; set load address for block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	625 ldd CBUFAD ; get start of block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	626 inca ; bump by 256
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	627 jsr LAC37 ; check if there's room for a maximum sized block of 255
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	628 jsr GETBLK ; go read a block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	629 bne LA4F8 ; brif there was an error during reading
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	630 lda BLKTYP ; get type of block read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	631 beq LA4F8 ; brif header block - IO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	632 bpl LA4D8 ; brif data block - read another
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	633 stx VARTAB ; save new end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	634 bsr LA53B ; stop tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	635 ldx #LABED-1 ; point to "OK" prompt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	636 jsr LB99C ; show prompt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	637 jmp LACE9 ; reset various things and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	638 LA4F8 jsr LAD19 ; clear out partial program load
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	639 LA4FB jmp LA619 ; raise IO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	640 ; This is the CLOADM command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	641 LA4FE jsr GETNCH ; eat the "M"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	642 bsr LA578 ; parse file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	643 jsr LA648 ; go find the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	644 LA505 ldx ZERO ; default offset is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	645 jsr GETCCH ; see if there's something after the file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	646 beq LA511 ; brif no offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	647 jsr LB26D ; make sure there's a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	648 jsr LB73D ; evaluate offset to X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	649 LA511 lda CASBUF+8 ; get file mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	650 cmpa #2 ; M/L program?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	651 bne LA4CD ; brif not - FM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	652 ldd CASBUF+11 ; get load address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	653 leau D,x ; add in offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	654 stu EXECJP ; set EXEC default address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	655 tst CASBUF+10 ; is it binary?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	656 bne LA4CD ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	657 ldd CASBUF+13 ; get load address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	658 leax d,x ; add in offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	659 stx CBUFAD ; set buffer address for loading
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	660 jsr CASON ; start up tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	661 LA52E jsr GETBLK ; read a block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	662 bne LA4FB ; brif error reading
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	663 stx CBUFAD ; save new load address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	664 tst BLKTYP ; set flags on block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	665 beq LA4FB ; brif another header - IO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	666 bpl LA52E ; brif it was data - read more
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	667 LA53B jmp LA7E9 ; turn off tape and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	668 ; The EXEC command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	669 EXEC beq LA545 ; brif no argument - use default address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	670 jsr LB73D ; evaluate EXEC address to X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	671 stx EXECJP ; set new default EXEC address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	672 LA545 jmp [EXECJP] ; transfer control to execution address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	673 ; Break check for LIST so it doesn't interrupt ASCII saves. Why is this here instead of with the rest of the break
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	674 ; check logic or packaged up with LIST?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	675 LA549 jsr RVEC11 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	676 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	677 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	678 beq LA5A1 ; brif so - don't do break check
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	679 jmp LADEB ; do the actual break check
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	680 ; Evaluate an expression and make sure it is within the limits of the screen and sets the cursor position.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	681 ; This really should be located with the PRINT command.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	682 LA554 jsr LB3E4 ; evaluate a positive expression to D
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	683 subd #511 ; is it within bounds?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	684 lbhi LB44A ; brif not - error out
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	685 addd #VIDRAM+511 ; adjust to be within the screen (and undo the SUBD above)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	686 std CURPOS ; set cursor position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	687 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	688 ; INKEY$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	689 INKEY lda IKEYIM ; was a key down during break check?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	690 bne LA56B ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	691 jsr KEYIN ; poll the keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	692 LA56B clr IKEYIM ; reset the break check cache
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	693 sta FPA0+3 ; store result for later return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	694 lbne LB68F ; brif a key was down - return it as a string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	695 sta STRDES ; set string length to 0 (no key down)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	696 jmp LB69B ; return the NULL string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	697 ; Parse a filename
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	698 LA578 ldx #CFNBUF ; point to file name buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	699 clr ,x+ ; zero out file name length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	700 lda #0x20 ; space character to initialize file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	701 LA57F sta ,x+ ; put a space in the buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	702 cmpx #CASBUF ; at end of file name?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	703 bne LA57F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	704 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	705 beq LA5A1 ; brif no name present
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	706 jsr LB156 ; evaluate the file name expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	707 jsr LB654 ; point to start of the file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	708 ldu #CFNBUF ; point to file name buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	709 stb ,u+ ; save string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	710 beq LA5A1 ; brif empty - we're done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	711 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	712 LA598 ldb #8 ; copy 8 bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	713 ; Move B bytes from (X) to (U)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	714 LA59A lda ,x+ ; copy a byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	715 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	716 decb ; done yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	717 bne LA59A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	718 LA5A1 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	719 ; Parse a device number and check validity
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	720 LA5A2 jsr LB26D ; check for comma and SN error if not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	721 LA5A5 cmpa #'# ; do we have a #?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	722 bne LA5AB ; brif not (it's optional)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	723 jsr GETNCH ; munch the #
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	724 LA5AB jsr LB141 ; evaluate the expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	725 LA5AE jsr INTCNV ; convert it to an integer in D
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	726 rolb ; move sign of B into C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	727 adca #0 ; add sign of B to A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	728 bne LA61F ; brif A doesn't match the sign of B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	729 rorb ; restore B (ADCA will have set C if B was negative)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	730 stb DEVNUM ; set device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	731 jsr RVEC1 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	732 beq LA5C4 ; brif device number set to screen/keyboard (valid)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	733 bpl LA61F ; brif not negative (not valid)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	734 cmpb #-2 ; is it printer or tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	735 blt LA61F ; brif not (not valid)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	736 LA5C4 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	737 ; Read file name from the line and do an error if anything follows it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	738 LA5C5 bsr LA578 ; parse file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	739 jsr GETCCH ; set flags on current character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	740 LA5C9 beq LA5C4 ; brif nothing there - it's good
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	741 jmp LB277 ; raise SN error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	742 ; EOF functoin
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	743 EOF jsr RVEC14 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	744 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	745 pshs a ; save it (so we can restore it later)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	746 bsr LA5AE ; check the device number (which is in FPA0)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	747 jsr LA3ED ; check validity for reading
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	748 LA5DA clrb ; not EOF = 0 (FALSE)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	749 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	750 beq LA5E4 ; brif keyboard - never EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	751 tst CINCTR ; is there anything in the input buffer?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	752 bne LA5E4 ; brif so - not EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	753 comb ; set EOF flag to -1 (true)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	754 LA5E4 puls a ; get back original device
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	755 sta DEVNUM ; restore it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	756 LA5E8 sex ; sign extend result to 16 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	757 jmp GIVABF ; go return the result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	758 ; SKIPF command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	759 SKIPF bsr LA5C5 ; parse file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	760 bsr LA648 ; look for the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	761 jsr LA6D1 ; read the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	762 bne LA619 ; brif error reading file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	763 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	764 ; OPEN command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	765 OPEN jsr RVEC0 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	766 jsr LB156 ; get file status (input/output)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	767 jsr LB6A4 ; get first character of status string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	768 pshs b ; save status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	769 bsr LA5A2 ; parse a comma then the device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	770 jsr LB26D ; make sure there's a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	771 bsr LA5C5 ; parse the file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	772 lda DEVNUM ; get device number of the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	773 clr DEVNUM ; reset actual device to the screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	774 puls b ; get back status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	775 cmpb #'I ; INPUT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	776 beq LA624 ; brif so - open a file for INPUT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	777 cmpb #'O ; OUTPUT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	778 beq LA658 ; brif so - open a file for OUTPUT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	779 LA616 ldb #21*2 ; raise FM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	780 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	781 LA619 ldb #20*2 ; raise I/O error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	782 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	783 LA61C ldb #18*2 ; raise AO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	784 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	785 LA61F ldb #19*2 ; raise DN error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	786 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	787 LA624 inca ; are we opening the tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	788 bmi LA616 ; brif printer - FM error; printer can't be opened for READ
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	789 bne LA657 ; brif screen - screen is always open
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	790 bsr LA648 ; read header block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	791 lda CASBUF+9 ; clear A if binary or machine language file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	792 anda CASBUF+10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	793 beq LA616 ; bad file mode if not data file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	794 inc FILSTA ; open file for input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	795 LA635 jsr LA701 ; start tape, read block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	796 bne LA619 ; brif error during read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	797 tst BLKTYP ; check block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	798 beq LA619 ; brif header block - something's wrong
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	799 bmi LA657 ; brif EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	800 lda BLKLEN ; get length of block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	801 beq LA635 ; brif empty block - read another
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	802 LA644 sta CINCTR ; set buffer count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	803 bra LA652 ; reset buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	804 LA648 tst FILSTA ; is the file open?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	805 bne LA61C ; brif so - AO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	806 bsr LA681 ; search for file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	807 bne LA619 ; brif error on read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	808 LA650 clr CINCTR ; mark buffer empty
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	809 LA652 ldx #CASBUF ; set buffer pointer to start of buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	810 stx CINPTR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	811 LA657 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	812 LA658 inca ; check for tape device
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	813 bne LA657 ; brif not tape (nothing doing - it's always open)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	814 inca ; make file type 1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	815 LA65C ldx #0xffff ; ASCII and data mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	816 LA65F tst FILSTA ; is file open?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	817 bne LA61C ; brif so - raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	818 ldu #CASBUF ; point to tape buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	819 stu CBUFAD ; set address of block to write
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	820 sta 8,u ; set file type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	821 stx 9,u ; set ASCII flag and mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	822 ldx #CFNBUF+1 ; point to file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	823 jsr LA598 ; move file name to the tape buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	824 clr BLKTYP ; set for header block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	825 lda #15 ; 15 bytes in a header block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	826 sta BLKLEN ; set block length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	827 jsr LA7E5 ; write the block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	828 lda #2 ; set file type to output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	829 sta FILSTA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	830 bra LA650 ; reset file pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	831 ; Search for correct cassette file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	832 LA681 ldx #CASBUF ; point to cassette buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	833 stx CBUFAD ; set location to read blocks to
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	834 LA686 lda CURLIN ; are we in immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	835 inca
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	836 bne LA696 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	837 jsr LA928 ; clear screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	838 ldx CURPOS ; get start of screen (set after clear)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	839 ldb #'S ; for "searching"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	840 stb ,x++ ; put it on the screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	841 stx CURPOS ; save cursor position to be one past the search indicator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	842 LA696 bsr LA701 ; read a block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	843 orb BLKTYP ; merge error flag with block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	844 bne LA6D0 ; brif error or not header
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	845 ldx #CASBUF ; point to block just read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	846 ldu #CFNBUF+1 ; point to the desired name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	847 ldb #8 ; compare 8 characters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	848 clr ,-s ; set flag to "match"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	849 LA6A6 lda ,x+ ; get character from just read block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	850 ldy CURLIN ; immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	851 leay 1,y
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	852 bne LA6B4 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	853 clr DEVNUM ; set output to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	854 jsr PUTCHR ; display character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	855 LA6B4 suba ,u+ ; subtract from desired file name (nonzero if no match)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	856 ora ,s ; merge with match flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	857 sta ,s ; save new match flag (will be nonzero if any character differs)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	858 decb ; done all characters?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	859 bne LA6A6 ; brif not - do another
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	860 lda ,s+ ; get match flag (and set flags)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	861 beq LA6CB ; brif we have a match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	862 tst -9,u ; did we actually have a file name or will any file do?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	863 beq LA6CB ; brif any file will do
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	864 bsr LA6D1 ; go read past the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	865 bne LA6D0 ; return on error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	866 bra LA686 ; keep looking
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	867 LA6CB lda #'F ; for "found"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	868 bsr LA6F8 ; put "F" on screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	869 clra ; set Z to indicat eno errors
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	870 LA6D0 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	871 LA6D1 tst CASBUF+10 ; check type of file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	872 bne LA6DF ; brif "blocked" file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	873 jsr CASON ; turn on tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	874 LA6D9 bsr GETBLK ; read a block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	875 bsr LA6E5 ; error or EOF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	876 bra LA6D9 ; read another block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	877 LA6DF bsr LA701 ; read a single block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	878 bsr LA6E5 ; error or EOF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	879 bra LA6DF ; read another block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	880 LA6E5 bne LA6ED ; got error reading block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	881 lda BLKTYP ; check block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	882 nega ; A is 0 now if EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	883 bmi LA700 ; brif not end of file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	884 deca ; clear error indicator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	885 LA6ED sta CSRERR ; set error flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	886 leas 2,s ; don't return to original caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	887 bra LA705 ; turn off motor and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	888 LA6F3 lda VIDRAM ; get first char on screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	889 eora #0x40 ; flip case
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	890 LA6F8 ldb CURLIN ; immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	891 incb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	892 bne LA700 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	893 sta VIDRAM ; save flipped case character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	894 LA700 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	895 ; Read a single block from tape (for a "blocked" file)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	896 LA701 bsr CASON ; start tape going
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	897 bsr GETBLK ; read block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	898 LA705 jsr LA7E9 ; stop tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	899 ldb CSRERR ; get error status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	900 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	901 ; Read a block from tape - this does the heavy lifting
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	902 GETBLK orcc #0x50 ; disable interrupts (timing is important)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	903 bsr LA6F3 ; reverse video of upper left character in direct mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	904 ldx CBUFAD ; point to destination buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	905 clra ; reset read byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	906 LA712 bsr LA755 ; read a bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	907 rora ; move bit into accumulator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	908 cmpa #0x3c ; have we synched on the start of the block data yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	909 bne LA712 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	910 bsr LA749 ; read block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	911 sta BLKTYP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	912 bsr LA749 ; get block size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	913 sta BLKLEN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	914 adda BLKTYP ; accumulate checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	915 sta CCKSUM ; save current checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	916 lda BLKLEN ; get back count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	917 sta CSRERR ; initialize counter; we use this since it will be ovewritten later anyway
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	918 beq LA73B ; brif empty block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	919 LA72B bsr LA749 ; read a byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	920 sta ,x ; save in buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	921 cmpa ,x+ ; make sure it wrote
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	922 bne LA744 ; brif error if it didn't match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	923 adda CCKSUM ; accumulate checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	924 sta CCKSUM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	925 dec CSRERR ; read all bytes?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	926 bne LA72B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	927 LA73B bsr LA749 ; read checksum from tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	928 suba CCKSUM ; does it match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	929 beq LA746 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	930 lda #1 ; checksum error flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	931 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	932 LA744 lda #2 ; non-RAM error flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	933 LA746 sta CSRERR ; save error status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	934 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	935 LA749 lda #8 ; read 8 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	936 sta CPULWD ; initialize counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	937 LA74D bsr LA755 ; read a bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	938 rora ; put it into accumulator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	939 dec CPULWD ; got all 8 bits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	940 bne LA74D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	941 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	942 LA755 bsr LA75D ; get time between transitions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	943 ldb CPERTM ; get timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	944 decb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	945 cmpb CMPMID ; set C if timer is below the transition point - high or 1; clear otherwise
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	946 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	947 LA75D clr CPERTM ; reset timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	948 tst CBTPHA ; check which phase we synched on
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	949 bne LA773 ; brif HI-LO synch
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	950 LA763 bsr LA76C ; read input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	951 bcs LA763 ; brif still high
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	952 LA767 bsr LA76C ; read input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	953 bcc LA767 ; brif still low
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	954 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	955 LA76C inc CPERTM ; bump timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	956 ldb PIA1 ; get input bit to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	957 rorb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	958 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	959 LA773 bsr LA76C ; read input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	960 bcc LA773 ; brif still low
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	961 LA777 bsr LA76C ; read output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	962 bcs LA777 ; brif still high
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	963 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	964 ; Start tape and look for sync bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	965 CASON orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	966 bsr LA7CA ; turn on tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	967 clr CPULWD ; reset timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	968 LA782 bsr LA763 ; wait for low-high transition
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	969 LA784 bsr LA7AD ; wait for it to go low again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	970 bhi LA797 ; brif in range for 1200 Hz
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	971 LA788 bsr LA7A7 ; wait for it to go high again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	972 blo LA79B ; brif in range for 2400 Hz
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	973 dec CPULWD ; decrement counter (synched on low-high)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	974 lda CPULWD ; get counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	975 cmpa #-96 ; have we seen 96 1-0-1-0 patterns (48 0x55s)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	976 LA792 bne LA782 ; brif not - wait some more
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	977 sta CBTPHA ; save phase we synched on
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	978 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	979 LA797 bsr LA7A7 ; wait for it to go high again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	980 bhi LA784 ; brif another 1200 Hz, 2 in a row, try again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	981 LA79B bsr LA7AD ; wait for it to go low again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	982 blo LA788 ; brif another 2400 Hz; go try again for high
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	983 inc CPULWD ; bump counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	984 lda CPULWD ; get counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	985 suba #96 ; set 0 if we've seen enought 0-1-0-1 patterns (0xaa)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	986 bra LA792 ; set phase and return or keep waiting
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	987 LA7A7 clr CPERTM ; reset period timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	988 bsr LA767 ; wait for high
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	989 bra LA7B1 ; set flags on result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	990 LA7AD clr CPERTM ; reset period timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	991 bsr LA777 ; wait for low
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	992 LA7B1 ldb CPERTM ; get period count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	993 cmpb CMP0 ; is it too long for 1200Hz?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	994 bhi LA7BA ; brif so - reset counts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	995 cmpb CMP1 ; set C if 2400Hz, clear C if 1200 Hz
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	996 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	997 LA7BA clr CPULWD ; reset sync counter (too slow or drop out)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	998 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	999 ; MOTOR command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1000 MOTOR tfr a,b ; save ON/OFF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1001 jsr GETNCH ; eat the ON/OFF token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1002 cmpb #0xaa ; OFF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1003 beq LA7E9 ; brif so - turn off tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1004 cmpb #0x88 ; ON?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1005 jsr LA5C9 ; SN error if no match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1006 ; Turn on tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1007 LA7CA lda PIA1+1 ; get motor control value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1008 ora #8 ; turn on bit 3 (starts motor)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1009 bsr LA7F0 ; put it back (dumb but it saves a byte)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1010 LA7D1 ldx ZERO ; maximum delay timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1011 LA7D3 leax -1,x ; count down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1012 bne LA7D3 ; brif not at 0 yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1013 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1014 ; Write a synch leader to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1015 WRLDR orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1016 bsr LA7CA ; turn on tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1017 ldx SYNCLN ; get count of 0x55s to write
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1018 LA7DE bsr LA828 ; write a 0x55
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1019 leax -1,x ; done?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1020 bne LA7DE ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1021 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1022 ; Write sync bytes and a block, then stop tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1023 LA7E5 bsr WRLDR ; write sync
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1024 LA7E7 bsr SNDBLK ; write block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1025 ; Turn off tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1026 LA7E9 andcc #0xaf ; enable interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1027 lda PIA1+1 ; get control register
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1028 anda #0xf7 ; disable motor bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1029 LA7F0 sta PIA1+1 ; set motor enable bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1030 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1031 ; Write a block to tape.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1032 SNDBLK orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1033 ldb BLKLEN ; get block size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1034 stb CSRERR ; initialize character counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1035 lda BLKLEN ; initialize checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1036 beq LA805 ; brif empty block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1037 ldx CBUFAD ; point to tape buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1038 LA800 adda ,x+ ; accumulate checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1039 decb ; end of block data?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1040 bne LA800 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1041 LA805 adda BLKTYP ; accumulate block type into checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1042 sta CCKSUM ; save calculated checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1043 ldx CBUFAD ; point to buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1044 bsr LA828 ; send a 0x55
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1045 lda #0x3c ; and then a 0x3c
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1046 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1047 lda BLKTYP ; send block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1048 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1049 lda BLKLEN ; send block size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1050 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1051 tsta ; empty block?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1052 beq LA824 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1053 LA81C lda ,x+ ; send character from block data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1054 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1055 dec CSRERR ; are we done yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1056 bne LA81C ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1057 LA824 lda CCKSUM ; send checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1058 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1059 LA828 lda #0x55 ; send a 0x55
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1060 LA82A pshs a ; save output byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1061 ldb #1 ; initialize bit probe
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1062 LA82E lda CLSTSN ; get ending value of last cycle
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1063 sta PIA1 ; set DA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1064 ldy #LA85C ; point to sine wave table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1065 bitb ,s ; is bit set?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1066 bne LA848 ; brif so - do high frequency
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1067 LA83B lda ,y+ ; get next sample (use all for low frequency)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1068 cmpy #LA85C+36 ; end of table?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1069 beq LA855 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1070 sta PIA1 ; set output sample
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1071 bra LA83B ; do another sample
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1072 LA848 lda ,y++ ; get next sample (use every other for high frequency)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1073 cmpy #LA85C+36 ; end of table?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1074 beq LA855 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1075 sta PIA1 ; send output sample
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1076 bra LA848 ; do another sample
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1077 LA855 sta CLSTSN ; save last sample that would have been sent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1078 lslb ; shift mask to next bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1079 bcc LA82E ; brif not done all 8 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1080 puls a,pc ; get back original character and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1081 ; This is the sample table for the tape sine wave
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1082 LA85C fcb 0x82,0x92,0xaa,0xba,0xca,0xda
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1083 fcb 0xea,0xf2,0xfa,0xfa,0xfa,0xf2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1084 fcb 0xea,0xda,0xca,0xba,0xaa,0x92
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1085 fcb 0x7a,0x6a,0x52,0x42,0x32,0x22
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1086 fcb 0x12,0x0a,0x02,0x02,0x02,0x0a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1087 fcb 0x12,0x22,0x32,0x42,0x52,0x6a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1088 ; SET command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1089 SET bsr LA8C1 ; get absolute screen position of graphics block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1090 pshs x ; save character location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1091 jsr LB738 ; evaluate comma then expression in B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1092 puls x ; get back character pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1093 cmpb #8 ; valid colour?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1094 bhi LA8D5 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1095 decb ; normalize colours
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1096 bmi LA895 ; brif colour 0 (use current colour)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1097 lda #0x10 ; 16 patterns per colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1098 mul
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1099 bra LA89D ; go save the colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1100 LA895 ldb ,x ; get current value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1101 bpl LA89C ; brif not grahpic
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1102 andb #0x70 ; keep only the colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1103 skip1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1104 LA89C clrb ; reset block to all black
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1105 LA89D pshs b ; save colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1106 bsr LA90D ; force a )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1107 lda ,x ; get current screen value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1108 bmi LA8A6 ; brif graphic block already
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1109 clra ; force all pixels off
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1110 LA8A6 anda #0x0f ; keep only pixel data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1111 ora GRBLOK ; set the desired pixel
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1112 ora ,s+ ; merge with desired colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1113 LA8AC ora #0x80 ; force it to be a graphic block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1114 sta ,x ; put new block on screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1115 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1116 ; RESET command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1117 RESET bsr LA8C1 ; get address of desired block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1118 bsr LA90D ; force a )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1119 clra ; zero block (no pixels)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1120 ldb ,x ; is it graphics?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1121 bpl LA8AC ; brif not - just blank the block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1122 com GRBLOK ; invert pixel data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1123 andb GRBLOK ; turn off the desired pixel
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1124 stb ,x ; put new pixel data on screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1125 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1126 ; Parse SET/RESET/POINT coordinates except for closing )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1127 LA8C1 jsr LB26A ; make sure it starts with (
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1128 LA8C4 jsr RVEC21 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1129 jsr LB70B ; get first coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1130 cmpb #63 ; valid horizontal coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1131 bhi LA8D5 ; brif out of range
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1132 pshs b ; save horizontal coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1133 jsr LB738 ; look for , followed by vertical coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1134 cmpb #31 ; in range for vertical?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1135 LA8D5 bhi LA948 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1136 pshs b ; save vertical coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1137 lsrb ; divide by two (two blocks per row)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1138 lda #32 ; 32 bytes per row
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1139 mul ; now we have the offset into video RAM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1140 ldx #VIDRAM ; point to start of screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1141 leax d,x ; now X points to the correct character row
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1142 ldb 1,s ; get horizontal coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1143 lsrb ; divide by two (two per character cell)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1144 abx ; now we're pointing to the correct character cell
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1145 puls a,b ; get back coordinates (vertical in A)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1146 anda #1 ; keep only row offset of vertical
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1147 rorb ; get column offset of horizontal to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1148 rola ; now we have "row * 2 + col" in A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1149 ldb #0x10 ; make a bit mask (one bit left of first pixel)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1150 LA8EE lsrb ; move mask right
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1151 deca ; at the right pixel?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1152 bpl LA8EE ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1153 stb GRBLOK ; save graphics block mask
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1154 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1155 ; POINT function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1156 POINT bsr LA8C4 ; evaluate coordinates
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1157 ldb #0xff ; default colour value is -1 (not graphics)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1158 lda ,x ; get character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1159 bpl LA90A ; brif not graphics
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1160 anda GRBLOK ; is desired pixel set?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1161 beq LA909 ; brif not - return 0 for "black"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1162 ldb ,x ; get graphics data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1163 lsrb ; shift right 4 to get colour in low bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1164 lsrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1165 lsrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1166 lsrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1167 andb #7 ; lose the graphics block bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1168 LA909 incb ; shift colours into 1 to 8 range
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1169 LA90A jsr LA5E8 ; convert B to floating point
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1170 LA90D jmp LB267 ; make sure we have a ) and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1171 ; CLS command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1172 CLS jsr RVEC22 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1173 LA913 beq LA928 ; brif no colour - just do a basic screen clear
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1174 jsr LB70B ; evaluate colour number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1175 cmpb #8 ; valid colour?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1176 bhi LA937 ; brif not - do the easter egg
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1177 tstb ; color 0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1178 beq LA925 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1179 decb ; normalize to 0 based colour numbers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1180 lda #0x10 ; 16 blocks per colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1181 mul ; now we have the base code for that colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1182 orb #0x0f ; set all pixels
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1183 LA925 orb #0x80 ; make it a graphics block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1184 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1185 LA928 ldb #0x60 ; VDG screen space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1186 ldx #VIDRAM ; point to start of screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1187 LA92D stx CURPOS ; set cursor position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1188 LA92F stb ,x+ ; blank a character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1189 cmpx #VIDRAM+511 ; end of screen?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1190 bls LA92F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1191 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1192 LA937 bsr LA928 ; clear te screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1193 ldx #LA166-1 ; point to the easter egg
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1194 jmp LB99C ; go display it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1195 ; Evaluate an expression to B, prefixed by a comma, and do FC error if 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1196 LA93F jsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1197 LA942 jsr LB70B ; evaluate expression to B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1198 tstb ; is it 0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1199 bne LA984 ; brif not - return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1200 LA948 jmp LB44A ; raise FC error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1201 ; SOUND command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1202 SOUND bsr LA942 ; evaluate frequency
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1203 stb SNDTON ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1204 bsr LA93F ; evaluate duration (after a comma)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1205 LA951 lda #4 ; constant factor for duration (each increment is 1/15 of a second)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1206 mul
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1207 std SNDDUR ; save length of sound (IRQ will count it down)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1208 lda PIA0+3 ; enable 60 Hz interrupt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1209 ora #1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1210 sta PIA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1211 clr ARYDIS ; clear array disable flag for some reason
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1212 bsr LA9A2 ; connect DAC to MUX output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1213 bsr LA976 ; turn on sound
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1214 LA964 bsr LA985 ; store mid range output value and delay
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1215 lda #0xfe ; store high value and delay
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1216 bsr LA987
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1217 bsr LA985 ; store mid range value and delay
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1218 lda #2 ; store low value and delay
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1219 bsr LA987
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1220 ldx SNDDUR ; has timer expired?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1221 bne LA964 ; brif not, do another wave
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1222 ; Disable sound output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1223 LA974 clra ; bit 3 to 0 will disable output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1224 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1225 ; Enable sound output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1226 LA976 lda #8 ; bit 3 set to enable output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1227 sta ,-s ; save desired value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1228 lda PIA1+3 ; get control register value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1229 anda #0xf7 ; reset value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1230 ora ,s+ ; set to desired value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1231 sta PIA1+3 ; set new sound output status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1232 LA984 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1233 LA985 lda #0x7e ; mid range value for DAC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1234 LA987 sta PIA1 ; set DAC output value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1235 lda SNDTON ; get frequency
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1236 LA98C inca ; increment it (gives shorter count with higher values, so higher frequencies work)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1237 bne LA98C ; brif not done yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1238 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1239 ; AUDIO command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1240 AUDIO tfr a,b ; save ON/OFF token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1241 jsr GETNCH ; munch the ON/OFF token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1242 cmpb #0xaa ; OFF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1243 beq LA974 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1244 subb #0x88 ; ON?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1245 jsr LA5C9 ; do SN error if not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1246 incb ; now B is 1 - cassette sound source
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1247 bsr LA9A2 ; set MUX input to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1248 bra LA976 ; enable sound
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1249 ; Set MUX source to value in B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1250 LA9A2 ldu #PIA0+1 ; point to PIA0 control register A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1251 bsr LA9A7 ; program bit 0 then fall through for bit 1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1252 LA9A7 lda ,u ; get control register value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1253 anda #0xf7 ; reset mux control bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1254 asrb ; shift desired value to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1255 bcc LA9B0 ; brif this bit is clear
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1256 ora #8 ; set the bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1257 LA9B0 sta ,u++ ; set register value and move to next register
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1258 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1259 ; IRQ service routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1260 BIRQSV lda PIA0+3 ; check for VSYNC interrupt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1261 bpl LA9C5 ; brif not - return. BUG: should clear HSYNC interrupt status first
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1262 lda PIA0+2 ; clear VSYNC interrupt status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1263 ldx >SNDDUR ; are we counting down for SOUND? (force extended in case DP is modified)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1264 beq LA9C5 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1265 leax -1,x ; count down one tick
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1266 stx >SNDDUR ; save new count (forced extended in case DP is modified)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1267 LA9C5 rti
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1268 ; JOYSTK function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1269 JOYSTK jsr LB70E ; evaluate which joystick axis is desired
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1270 cmpb #3 ; valid axis?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1271 lbhi LB44A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1272 tstb ; want axis 0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1273 bne LA9D4 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1274 bsr GETJOY ; read axis data if axis 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1275 LA9D4 ldx #POTVAL ; point to axis values
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1276 ldb FPA0+3 ; get desired axis
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1277 ldb b,x ; get axis value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1278 jmp LB4F3 ; return value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1279 ; Read all four joystick axes. Note that this routine will try 10 times to get a value that matches
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1280 ; the value obtained during the previous call to this routine. Thus, if the axis value has changed,
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1281 ; this routine will do the read ten times before just returning the last value. This is assininely
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1282 ; slow and probably a bug since it seems more logical to look for two matching reads in a row. Note
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1283 ; also that this routine should be using PSHS and PULS but it doesn't.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1284 GETJOY bsr LA974 ; turn off sound
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1285 ldx #POTVAL+4 ; point to the end of the axis data (we'll work backwards)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1286 ldb #3 ; start with axis 3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1287 LA9E5 lda #10 ; 10 tries to see if we match the last call to this routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1288 std ,--s ; save retry counter and axis number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1289 bsr LA9A2 ; set MUX for the correct axis
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1290 LA9EB ldd #0x4080 ; set initial trial value to mid range and the next difference to add/subtract to half
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1291 LA9EE sta ,-s ; store the add/subtract value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1292 orb #2 ; keep rs232 output marking
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1293 stb PIA1 ; set DAC output to the trial value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1294 eorb #2 ; remove RS232 output value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1295 lda PIA0 ; read the comparator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1296 bmi LA9FF ; brif comparator output is high (DAC is lower than the axis value)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1297 subb ,s ; subtract next bit value (split the difference toward 0)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1298 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1299 LA9FF addb ,s ; add next bit value (split the different toward infinity)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1300 lda ,s+ ; get bit value back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1301 lsra ; cut in half
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1302 cmpa #1 ; have we done that last value for the DAC?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1303 bne LA9EE ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1304 lsrb ; normalize the axis value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1305 lsrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1306 cmpb -1,x ; does it match the read from the last call to this routine?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1307 beq LAA12 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1308 dec ,s ; are we out of retries?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1309 bne LA9EB ; brif not - try again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1310 LAA12 stb ,-x ; save new value and move pointer back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1311 ldd ,s++ ; get axis counter and clean up retry counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1312 decb ; move to next axis
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1313 bpl LA9E5 ; brif still more axes to do
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1314 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1315 ; This is the "bottom half" of the character fetching routines.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1316 BROMHK cmpa #'9+1 ; is it >= colon?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1317 bhs LAA28 ; brif so Z set if colon, C clear.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1318 cmpa #0x20 ; space?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1319 bne LAA24 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1320 jmp GETNCH ; move on to another character if space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1321 LAA24 suba #'0 ; normalize ascii digit to 0-9; we already handled above digit 9
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1322 suba #-'0 ; this will cause a carry for any value that was already positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1323 LAA28 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1324 ; Jump table for functions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1325 LAA29 fdb SGN ; SGN 0x80
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1326 fdb INT ; INT 0x81
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1327 fdb ABS ; ABS 0x82
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1328 fdb USRJMP ; USR 0x83
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1329 fdb RND ; RND 0x84
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1330 fdb SIN ; SIN 0x85
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1331 fdb PEEK ; PEEK 0x86
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1332 fdb LEN ; LEN 0x87
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1333 fdb STR ; STR$ 0x88
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1334 fdb VAL ; VAL 0x89
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1335 fdb ASC ; ASC 0x8a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1336 fdb CHR ; CHR$ 0x8b
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1337 fdb EOF ; EOF 0x8c
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1338 fdb JOYSTK ; JOYSTK 0x8d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1339 fdb LEFT ; LEFT$ 0x8e
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1340 fdb RIGHT ; RIGHT$ 0x8f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1341 fdb MID ; MID$ 0x90
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1342 fdb POINT ; POINT 0x91
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1343 fdb INKEY ; INKEY$ 0x92
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1344 fdb MEM ; MEM 0x93
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1345 ; Operator precedence and jump table (binary ops except relational)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1346 LAA51 fcb 0x79 ; +
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1347 fdb LB9C5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1348 fcb 0x79 ; -
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1349 fdb LB9BC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1350 fcb 0x7b ; *
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1351 fdb LBACC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1352 fcb 0x7b ; /
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1353 fdb LBB91
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1354 fcb 0x7f ; ^ (exponentiation)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1355 fdb EXPJMP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1356 fcb 0x50 ; AND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1357 fdb LB2D5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1358 fcb 0x46 ; OR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1359 fdb LB2D4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1360 ; Reserved words table for commands
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1361 LAA66 fcs 'FOR' ; 0x80
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1362 fcs 'GO' ; 0x81
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1363 fcs 'REM' ; 0x82
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1364 fcs "'" ; 0x83
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1365 fcs 'ELSE' ; 0x84
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1366 fcs 'IF' ; 0x85
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1367 fcs 'DATA' ; 0x86
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1368 fcs 'PRINT' ; 0x87
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1369 fcs 'ON' ; 0x88
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1370 fcs 'INPUT' ; 0x89
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1371 fcs 'END' ; 0x8a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1372 fcs 'NEXT' ; 0x8b
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1373 fcs 'DIM' ; 0x8c
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1374 fcs 'READ' ; 0x8d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1375 fcs 'RUN' ; 0x8e
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1376 fcs 'RESTORE' ; 0x8f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1377 fcs 'RETURN' ; 0x90
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1378 fcs 'STOP' ; 0x91
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1379 fcs 'POKE' ; 0x92
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1380 fcs 'CONT' ; 0x93
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1381 fcs 'LIST' ; 0x94
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1382 fcs 'CLEAR' ; 0x95
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1383 fcs 'NEW' ; 0x96
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1384 fcs 'CLOAD' ; 0x97
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1385 fcs 'CSAVE' ; 0x98
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1386 fcs 'OPEN' ; 0x99
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1387 fcs 'CLOSE' ; 0x9a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1388 fcs 'LLIST' ; 0x9b
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1389 fcs 'SET' ; 0x9c
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1390 fcs 'RESET' ; 0x9d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1391 fcs 'CLS' ; 0x9e
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1392 fcs 'MOTOR' ; 0x9f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1393 fcs 'SOUND' ; 0xa0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1394 fcs 'AUDIO' ; 0xa1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1395 fcs 'EXEC' ; 0xa2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1396 fcs 'SKIPF' ; 0xa3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1397 fcs 'TAB(' ; 0xa4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1398 fcs 'TO' ; 0xa5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1399 fcs 'SUB' ; 0xa6
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1400 fcs 'THEN' ; 0xa7
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1401 fcs 'NOT' ; 0xa8
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1402 fcs 'STEP' ; 0xa9
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1403 fcs 'OFF' ; 0xaa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1404 fcs '+' ; 0xab
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1405 fcs '-' ; 0xac
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1406 fcs '*' ; 0xad
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1407 fcs '/' ; 0xae
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1408 fcs '^' ; 0xaf
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1409 fcs 'AND' ; 0xb0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1410 fcs 'OR' ; 0xb1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1411 fcs '>' ; 0xb2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1412 fcs '=' ; 0xb3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1413 fcs '<' ; 0xb4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1414 ; Reserved word list for functions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1415 LAB1A fcs 'SGN' ; 0x80
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1416 fcs 'INT' ; 0x81
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1417 fcs 'ABS' ; 0x82
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1418 fcs 'USR' ; 0x83
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1419 fcs 'RND' ; 0x84
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1420 fcs 'SIN' ; 0x85
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1421 fcs 'PEEK' ; 0x86
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1422 fcs 'LEN' ; 0x87
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1423 fcs 'STR$' ; 0x88
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1424 fcs 'VAL' ; 0x89
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1425 fcs 'ASC' ; 0x8a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1426 fcs 'CHR$' ; 0x8b
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1427 fcs 'EOF' ; 0x8c
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1428 fcs 'JOYSTK' ; 0x8d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1429 fcs 'LEFT$' ; 0x8e
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1430 fcs 'RIGHT$' ; 0x8f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1431 fcs 'MID$' ; 0x90
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1432 fcs 'POINT' ; 0x91
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1433 fcs 'INKEY$' ; 0x92
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1434 fcs 'MEM' ; 0x93
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1435 ; Jump table for commands
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1436 LAB67 fdb FOR ; 0x80 FOR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1437 fdb GO ; 0x81 GO
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1438 fdb REM ; 0x82 REM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1439 fdb REM ; 0x83 '
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1440 fdb REM ; 0x84 ELSE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1441 fdb IFTOK ; 0x85 IF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1442 fdb DATA ; 0x86 DATA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1443 fdb PRINT ; 0x87 PRINT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1444 fdb ON ; 0x88 ON
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1445 fdb INPUT ; 0x89 INPUT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1446 fdb ENDTOK ; 0x8a END
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1447 fdb NEXT ; 0x8b NEXT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1448 fdb DIM ; 0x8c DIM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1449 fdb READ ; 0x8d READ
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1450 fdb RUN ; 0x8e RUN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1451 fdb RESTOR ; 0x8f RESTORE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1452 fdb RETURN ; 0x90 RETURN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1453 fdb STOP ; 0x91 STOP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1454 fdb POKE ; 0x92 POKE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1455 fdb CONT ; 0x93 CONT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1456 fdb LIST ; 0x94 LIST
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1457 fdb CLEAR ; 0x95 CLEAR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1458 fdb NEW ; 0x96 NEW
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1459 fdb CLOAD ; 0x97 CLOAD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1460 fdb CSAVE ; 0x98 CSAVE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1461 fdb OPEN ; 0x99 OPEN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1462 fdb CLOSE ; 0x9a CLOSE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1463 fdb LLIST ; 0x9b LLIST
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1464 fdb SET ; 0x9c SET
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1465 fdb RESET ; 0x9d RESET
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1466 fdb CLS ; 0x9e CLS
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1467 fdb MOTOR ; 0x9f MOTOR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1468 fdb SOUND ; 0xa0 SOUND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1469 fdb AUDIO ; 0xa1 AUDIO
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1470 fdb EXEC ; 0xa2 EXEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1471 fdb SKIPF ; 0xa3 SKIPF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1472 ; Error message table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1473 LABAF fcc 'NF' ; 0 NEXT without FOR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1474 fcc 'SN' ; 1 Syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1475 fcc 'RG' ; 2 RETURN without GOSUB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1476 fcc 'OD' ; 3 Out of data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1477 fcc 'FC' ; 4 Illegal function call
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1478 fcc 'OV' ; 5 Overflow
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1479 fcc 'OM' ; 6 Out of memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1480 fcc 'UL' ; 7 Undefined line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1481 fcc 'BS' ; 8 Bad subscript
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1482 fcc 'DD' ; 9 Redimensioned array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1483 fcc '/0' ; 10 Division by 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1484 fcc 'ID' ; 11 Illegal direct statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1485 fcc 'TM' ; 12 Type mismatch
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1486 fcc 'OS' ; 13 Out of string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1487 fcc 'LS' ; 14 String too long
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1488 fcc 'ST' ; 15 String formula too complex
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1489 fcc 'CN' ; 16 Can't continue
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1490 fcc 'FD' ; 17 Bad file data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1491 fcc 'AO' ; 18 File already open
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1492 fcc 'DN' ; 19 Device number error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1493 fcc 'IO' ; 20 Input/output error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1494 fcc 'FM' ; 21 Bad file mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1495 fcc 'NO' ; 22 File not open
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1496 fcc 'IE' ; 23 Input past end of file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1497 fcc 'DS' ; 24 Direct statement in file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1498 LABE1 fcn ' ERROR'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1499 LABE8 fcn ' IN '
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1500 LABED fcb 0x0d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1501 LABEE fcc 'OK'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1502 fcb 0x0d,0x00
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1503 LABF2 fcb 0x0d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1504 fcn 'BREAK'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1505 ; Search stack for a FOR/NEXT stack frame. Stop search when something that isn't a FOR/NEXT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1506 ; stack frame is found. Enter with the index variable descriptor pointer in VARDES, or NULL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1507 ; for the first match.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1508 ;
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1509 ; NOTE: this routine can be reworked to avoid needed two temporaries by taking advantage of the
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1510 ; 6809's registers. This requires some minor tweaks where the routine is called. Further, the
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1511 ; use of B is completely pointless and, even if B is going to be used, why is it reloaded on
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1512 ; every loop?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1513 LABF9 leax 4,s ; skip past our caller and the main command loop return address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1514 LABFB ldb #18 ; each FOR/NEXT frame is 18 bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1515 stx TEMPTR ; save current search pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1516 lda ,x ; get first byte of this frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1517 suba #0x80 ; set to 0 if FOR/NEXT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1518 bne LAC1A ; brif not FOR/NEXT (we hit the end of the stack for a GOSUB frame)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1519 ldx 1,x ; get index variable descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1520 stx TMPTR1 ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1521 ldx VARDES ; get desired index descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1522 beq LAC16 ; brif NULL - we found something
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1523 cmpx TMPTR1 ; does this one match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1524 beq LAC1A ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1525 ldx TEMPTR ; get back frame pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1526 abx ; move to next entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1527 bra LABFB ; check next block of data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1528 LAC16 ldx TMPTR1 ; get index variable of this frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1529 stx VARDES ; set it as the one found
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1530 LAC1A ldx TEMPTR ; get matching frame pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1531 tsta ; set Z if FOR/NEXT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1532 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1533 ; This is a block copy routine which copies from top to bottom. It's not clear that the use of
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1534 ; this routine actually saves any ROM space compared to just implementing the copies directly
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1535 ; once all the marshalling to set up the parameter variables is taken into account.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1536 LAC1E bsr LAC37 ; check to see if stack collides with D
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1537 LAC20 ldu V41 ; point to destination
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1538 leau 1,u ; offset for pre-dec
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1539 ldx V43 ; point to source
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1540 leax 1,x ; offset for pre-dec
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1541 LAC28 lda ,-x ; get source byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1542 pshu a ; store at destination (sta ,-u would be less weird)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1543 cmpx V47 ; at the bottom of the copy?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1544 bne LAC28 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1545 stu V45 ; save final destination address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1546 LAC32 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1547 ; Check for 2*B (0 <= B <= 127) bytes for free memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1548 LAC33 clra ; zero extend
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1549 aslb ; times 2 (loses bit 7 of B)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1550 addd ARYEND ; add to top of used memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1551 LAC37 addd #STKBUF ; add a fudge factor for interpreter operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1552 bcs LAC44 ; brif >65535!
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1553 sts BOTSTK ; get current stack pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1554 cmpd BOTSTK ; is our new address above that?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1555 blo LAC32 ; brif not - no error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1556 LAC44 ldb #6*2 ; raise OM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1557 ; The error servicing routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1558 LAC46 jsr RVEC16 ; do the RAM hook dance (ON ERROR reserved hook)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1559 LAC49 jsr RVEC17 ; do the RAM hook dance again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1560 jsr LA7E9 ; turn off tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1561 jsr LA974 ; disable sound
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1562 jsr LAD33 ; reset stack, etc.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1563 clr DEVNUM ; reset output to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1564 jsr LB95C ; do a newline
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1565 jsr LB9AF ; send a ?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1566 ldx #LABAF ; point to error table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1567 abx ; offset to correct message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1568 bsr LACA0 ; send a char from X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1569 bsr LACA0 ; send another char from X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1570 ldx #LABE1-1 ; point to "ERROR" message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1571 LAC68 jsr LB99C ; print ERROR message (or BREAK)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1572 lda CURLIN ; are we in immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1573 inca
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1574 beq LAC73 ; brif not - go to immediate mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1575 jsr LBDC5 ; print "IN ****"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1576 ; This is the immediate mode loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1577 LAC73 jsr LB95C ; do a newline if needed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1578 LAC76 ldx #LABEE-1 ; point to prompt (without leading CR)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1579 jsr LB99C ; show prompt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1580 LAC7C jsr LA390 ; read an input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1581 ldu #0xffff ; flag immediate mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1582 stu CURLIN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1583 bcs LAC7C ; brif we ended on BREAK - just go for another line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1584 tst CINBFL ; EOF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1585 lbne LA4BF ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1586 stx CHARAD ; save start of input line as input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1587 jsr GETNCH ; get character from input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1588 beq LAC7C ; brif no input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1589 bcs LACA5 ; brif numeric - adding or removing a line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1590 ldb #2*24 ; code for "direct statement in file"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1591 tst DEVNUM ; keyboard input?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1592 bne LAC46 ; brif not - complain about direct statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1593 jsr LB821 ; go tokenize the input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1594 jmp LADC0 ; go execute the newly tokenized line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1595 LACA0 lda ,x+ ; get character and advance pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1596 jmp LB9B1 ; output it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1597 LACA5 jsr LAF67 ; convert line number to binary
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1598 ldx BINVAL ; get converted number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1599 stx LINHDR ; put it before the line we just read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1600 jsr LB821 ; tokenize the input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1601 stb TMPLOC ; save line length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1602 bsr LAD01 ; find where the line should be in the program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1603 bcs LACC8 ; brif the line number isn't already present
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1604 ldd V47 ; get address where the line is in the program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1605 subd ,x ; get the difference between here and the end of the line (negative)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1606 addd VARTAB ; subtract line length from the end of the program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1607 std VARTAB ; save new end of program address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1608 ldu ,x ; get start of next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1609 LACC0 pulu a ; get source byte (lda ,u+ would be less weird)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1610 sta ,x+ ; move it down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1611 cmpx VARTAB ; have we moved everything yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1612 bne LACC0 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1613 LACC8 lda LINBUF ; see if there is actually a line to input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1614 beq LACE9 ; brif not - we just needed to remove the line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1615 ldd VARTAB ; get current end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1616 std V43 ; set as source pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1617 addb TMPLOC ; add in the length of the new line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1618 adca #0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1619 std V41 ; save destination pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1620 jsr LAC1E ; make sure there's enough room and then make a hole for the new line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1621 ldu #LINHDR-2 ; point to the line (well, 4 bytes before it, incl line number and fake next line pointer)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1622 LACDD pulu a ; get byte from new line (lda ,u+ would be less weird)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1623 sta ,x+ ; stow it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1624 cmpx V45 ; at the end of the hole we just made?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1625 bne LACDD ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1626 ldx V41 ; get save new top of program address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1627 stx VARTAB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1628 LACE9 bsr LAD21 ; reset variables, etc.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1629 bsr LACEF ; adjust next line pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1630 bra LAC7C ; go read another input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1631 ; Recompute next line pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1632 LACEF ldx TXTTAB ; point to start of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1633 LACF1 ldd ,x ; get address of next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1634 beq LAD16 ; brif end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1635 leau 4,x ; move past pointer and line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1636 LACF7 lda ,u+ ; are we at the end of the line?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1637 bne LACF7 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1638 stu ,x ; save new next line pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1639 ldx ,x ; point to next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1640 bra LACF1 ; process the next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1641 ; Find a line in the program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1642 LAD01 ldd BINVAL ; get desired line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1643 ldx TXTTAB ; point to start of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1644 LAD05 ldu ,x ; get address of next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1645 beq LAD12 ; brif end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1646 cmpd 2,x ; do we have a match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1647 bls LAD14 ; brif our search number is <= the number here
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1648 ldx ,x ; move to next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1649 bra LAD05 ; check another line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1650 LAD12 orcc #1 ; set C for not found
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1651 LAD14 stx V47 ; save address of matching line or line just after where it would have been
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1652 LAD16 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1653 ; NEW command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1654 ; This routine has multiple entry points used for various "levels" of NEW
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1655 NEW bne LAD14 ; brif there was input given; should be LAD16!
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1656 LAD19 ldx TXTTAB ; point to start of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1657 clr ,x+ ; blank out program (with NULL next line pointer)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1658 clr ,x+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1659 stx VARTAB ; save end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1660 LAD21 ldx TXTTAB ; get start of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1661 jsr LAEBB ; put input pointer there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1662 LAD26 ldx MEMSIZ ; reset string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1663 stx STRTAB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1664 jsr RESTOR ; reset DATA pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1665 ldx VARTAB ; clear out scalars and arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1666 stx ARYTAB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1667 stx ARYEND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1668 LAD33 ldx #STRSTK ; reset the string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1669 stx TEMPPT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1670 ldx ,s ; get return address (we're going to reset the stack)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1671 lds FRETOP ; reset the stack to top of memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1672 clr ,-s ; put stopper so FOR/NEXT search will actually stop here
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1673 clr OLDPTR ; reset "CONT" state
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1674 clr OLDPTR+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1675 clr ARYDIS ; un-disable arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1676 jmp ,x ; return to original caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1677 ; FOR command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1678 FOR lda #0x80 ; disable array parsing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1679 sta ARYDIS
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1680 jsr LET ; assign start value to index
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1681 jsr LABF9 ; search stack for matching FOR/NEXT frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1682 leas 2,s ; lose return address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1683 bne LAD59 ; brif variable not already being used
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1684 ldx TEMPTR ; get address of matched data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1685 leas b,x ; move stack pointer to the end of it (B is set to 18 in the stack search)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1686 LAD59 ldb #9 ; is there room for 18 bytes in memory?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1687 jsr LAC33
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1688 jsr LAEE8 ; get address of the end of this statement in X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1689 ldd CURLIN ; get line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1690 pshs x,b,a ; save next line address and current line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1691 ldb #0xa5 ; make sure we have TO
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1692 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1693 jsr LB143 ; make sure we have a numeric index
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1694 jsr LB141 ; evaluate terminal condition value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1695 ldb FP0SGN ; pack FPA0 in place
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1696 orb #0x7f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1697 andb FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1698 stb FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1699 ldy #LAD7F ; where to come back to
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1700 jmp LB1EA ; stash terminal condition on the stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1701 LAD7F ldx #LBAC5 ; point to FP 1.0 (default step)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1702 jsr LBC14 ; unpack it to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1703 jsr GETCCH ; get character after the terminal
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1704 cmpa #0xa9 ; is it STEP?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1705 bne LAD90 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1706 jsr GETNCH ; eat STEP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1707 jsr LB141 ; evaluate step condition
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1708 LAD90 jsr LBC6D ; get "status" of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1709 jsr LB1E6 ; stash FPA0 on the stack (for step value)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1710 ldd VARDES ; get variable descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1711 pshs d ; put that on the stack too
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1712 lda #0x80 ; flag the frame as a FOR/NEXT frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1713 pshs a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1714 ; Main command interpretation loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1715 LAD9E jsr RVEC20 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1716 andcc #0xaf ; make sure interrupts are running
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1717 bsr LADEB ; check for BREAK/pause
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1718 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1719 stx TINPTR ; save input pointer for start of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1720 lda ,x+ ; get current input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1721 beq LADB4 ; brif end of line - move to another line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1722 cmpa #': ; end of statement?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1723 beq LADC0 ; brif so - keep processing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1724 LADB1 jmp LB277 ; raise a syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1725 LADB4 lda ,x++ ; get MSB of next line pointer and skip past pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1726 sta ENDFLG
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1727 beq LAE15 ; brif MSB of next line address is 0 (do END)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1728 ldd ,x+ ; get line number but only advance one
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1729 std CURLIN ; set current line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1730 stx CHARAD ; set input pointer to one before line text
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1731 LADC0 jsr GETNCH ; move past statement separator or to first character in line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1732 bsr LADC6 ; process a command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1733 bra LAD9E ; handle next statement or line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1734 LADC6 beq LAE40 ; return if end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1735 tsta ; is it a token?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1736 lbpl LET ; brif not - do a LET
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1737 cmpa #0xa3 ; above SKIPF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1738 bhi LADDC ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1739 ldx COMVEC+3 ; point to jump table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1740 lsla ; two bytes per entry (loses the token bias)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1741 tfr a,b ; put it in B for unsigned ABX
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1742 abx
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1743 jsr GETNCH ; move past token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1744 jmp [,x] ; transfer control to the handler (which will return to the main loop)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1745 LADDC cmpa #0xb4 ; is it a non-executable token?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1746 bls LADB1 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1747 jmp [COMVEC+13] ; transfer control to ECB command handler
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1748 ; RESTORE command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1749 RESTOR ldx TXTTAB ; point to beginning of the program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1750 leax -1,x ; move back one (to compensate for "GETNCH")
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1751 LADE8 stx DATPTR ; save as new data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1752 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1753 ; BREAK check
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1754 LADEB jsr KEYIN ; read keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1755 beq LADFA ; brif no key down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1756 LADF0 cmpa #3 ; BREAK?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1757 beq STOP ; brif so - do a STOP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1758 cmpa #0x13 ; pause (SHIFT-@)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1759 beq LADFB ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1760 sta IKEYIM ; cache key for later INKEY$ so break check doesn't break INKEY$
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1761 LADFA rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1762 LADFB jsr KEYIN ; read keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1763 beq LADFB ; brif no key down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1764 bra LADF0 ; process pressed key in case BREAK or SHIFT-@ again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1765 ; END command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1766 ENDTOK jsr LA426 ; close files
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1767 jsr GETCCH ; re-get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1768 bra LAE0B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1769 ; STOP command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1770 STOP orcc #1 ; flag "STOP"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1771 LAE0B bne LAE40 ; brif not end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1772 ldx CHARAD ; save current input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1773 stx TINPTR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1774 LAE11 ror ENDFLG ; save END/STOP flag (C)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1775 leas 2,s ; lose return address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1776 LAE15 ldx CURLIN ; get current input line (end of program comes here)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1777 cmpx #0xffff ; immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1778 beq LAE22 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1779 stx OLDTXT ; save line where we stopped executing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1780 ldx TINPTR ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1781 stx OLDPTR ; save location where we stopped executing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1782 LAE22 clr DEVNUM ; reset to screen/keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1783 ldx #LABF2-1 ; point to BREAK message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1784 tst ENDFLG ; are we doing "BREAK"?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1785 lbpl LAC73 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1786 jmp LAC68 ; go do the BREAK message and return to main loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1787 ; CONT command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1788 CONT bne LAE40 ; brif not end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1789 ldb #2*16 ; code for can't continue
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1790 ldx OLDPTR ; get saved execution pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1791 lbeq LAC46 ; brif no saved pointer - raise CN error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1792 stx CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1793 ldx OLDTXT ; reset current line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1794 stx CURLIN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1795 LAE40 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1796 ; CLEAR command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1797 CLEAR beq LAE6F ; brif no argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1798 jsr LB3E6 ; evaluate string space size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1799 pshs d ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1800 ldx MEMSIZ ; get memory size (top of memory)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1801 jsr GETCCH ; is there anything after the string space size?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1802 beq LAE5A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1803 jsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1804 jsr LB73D ; get top of memory value in X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1805 leax -1,x ; move back one (top of cleared space)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1806 cmpx TOPRAM ; is it within the memory available?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1807 bhi LAE72 ; brif higher than top of memory - OM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1808 LAE5A tfr x,d ; so we can do math for checking memory usage
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1809 subd ,s++ ; subtract out string space value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1810 bcs LAE72 ; brif less than 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1811 tfr d,u ; U is bottom of cleared space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1812 subd #STKBUF ; also account for slop space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1813 bcs LAE72 ; brif less than 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1814 subd VARTAB ; is there still room for the program?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1815 blo LAE72 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1816 stu FRETOP ; set top of free memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1817 stx MEMSIZ ; set size of usable memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1818 LAE6F jmp LAD26 ; erase variables, etc.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1819 LAE72 jmp LAC44 ; raise OM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1820 ; RUN command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1821 RUN jsr RVEC18 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1822 jsr LA426 ; close any open files
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1823 jsr GETCCH ; is there a line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1824 lbeq LAD21 ; brif no line number - start from beginning
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1825 jsr LAD26 ; clear variables, etc.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1826 bra LAE9F ; "GOTO" the line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1827 ; GO command (GOTO and GOSUB)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1828 GO tfr a,b ; save TO/SUB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1829 LAE88 jsr GETNCH ; eat the TO/SUB token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1830 cmpb #0xa5 ; TO?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1831 beq LAEA4 ; brif GOTO
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1832 cmpb #0xa6 ; SUB?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1833 bne LAED7 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1834 ldb #3 ; room for 6 bytes?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1835 jsr LAC33
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1836 ldu CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1837 ldx CURLIN ; get line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1838 lda #0xa6 ; flag for GOSUB frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1839 pshs u,x,a ; set stack frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1840 LAE9F bsr LAEA4 ; do "GOTO"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1841 jmp LAD9E ; go back to main loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1842 ; Actual GOTO is here
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1843 LAEA4 jsr GETCCH ; get current input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1844 jsr LAF67 ; convert number to binary
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1845 bsr LAEEB ; move input pointer to end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1846 leax 1,x ; point to start of next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1847 ldd BINVAL ; get desired line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1848 cmpd CURLIN ; is it beyond here?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1849 bhi LAEB6 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1850 ldx TXTTAB ; start search at beginning of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1851 LAEB6 jsr LAD05 ; find line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1852 bcs LAED2 ; brif not found
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1853 LAEBB leax -1,x ; move to just before start of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1854 stx CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1855 LAEBF rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1856 ; RETURN command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1857 RETURN bne LAEBF ; exit if argument given
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1858 lda #0xff ; set VARDES to an illegal value so we ignore FOR frames
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1859 sta VARDES
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1860 jsr LABF9 ; look for a GOSUB frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1861 tfr x,s ; reset stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1862 cmpa #0xa6-0x80 ; is it a GOSUB frame?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1863 beq LAEDA ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1864 ldb #2*2 ; code for RETURN without GOSUB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1865 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1866 LAED2 ldb #7*2 ; code for undefined line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1867 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1868 LAED7 jmp LB277 ; raise syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1869 LAEDA puls a,x,u ; get back saved line number and input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1870 stx CURLIN ; reset line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1871 stu CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1872 ; DATA command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1873 DATA bsr LAEE8 ; move input pointer to end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1874 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1875 ; REM command (also ELSE)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1876 REM bsr LAEEB ; move input pointer to end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1877 stx CHARAD ; save new input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1878 LAEE7 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1879 ; Return end of statement (LAEE8) or line (AEEB) in X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1880 LAEE8 ldb #': ; colon is statement terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1881 skip1lda
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1882 LAEEB clrb ; make main terminator NUL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1883 stb CHARAC ; save terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1884 clrb ; end of line - always terminates
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1885 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1886 LAEF1 tfr b,a ; save secondary terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1887 ldb CHARAC ; get main terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1888 sta CHARAC ; save secondary
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1889 LAEF7 lda ,x ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1890 beq LAEE7 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1891 pshs b ; save terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1892 cmpa ,s+ ; does it match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1893 beq LAEE7 ; brif so - bail
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1894 leax 1,x ; move pointer ahead
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1895 cmpa #'" ; start of string?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1896 beq LAEF1 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1897 inca ; functon token?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1898 bne LAF0C ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1899 leax 1,x ; skip second part of function token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1900 LAF0C cmpa #0x85+1 ; IF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1901 bne LAEF7 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1902 inc IFCTR ; bump "IF" count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1903 bra LAEF7 ; get check another input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1904 ; IF command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1905 IFTOK jsr LB141 ; evaluate condition
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1906 jsr GETCCH ; find out what's after the conditin
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1907 cmpa #0x81 ; GO?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1908 beq LAF22 ; treat same as THEN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1909 ldb #0xa7 ; make sure we have a THEN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1910 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1911 LAF22 lda FP0EXP ; get true/false (false is 0)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1912 bne LAF39 ; brif condition true
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1913 clr IFCTR ; reset IF counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1914 LAF28 bsr DATA ; skip over statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1915 tsta ; end of line?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1916 beq LAEE7 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1917 jsr GETNCH ; get start of this statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1918 cmpa #0x84 ; ELSE?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1919 bne LAF28 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1920 dec IFCTR ; is it a matching ELSE?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1921 bpl LAF28 ; brif not - keep looking
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1922 jsr GETNCH ; eat the ELSE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1923 LAF39 jsr GETCCH ; get current input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1924 lbcs LAEA4 ; brif numeric - to a GOTO
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1925 jmp LADC6 ; let main loop interpret the next command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1926 ; ON command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1927 ON jsr LB70B ; evaluate index expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1928 LAF45 ldb #0x81 ; make sure we have "GO"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1929 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1930 pshs a ; save TO/SUB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1931 cmpa #0xa6 ; SUB?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1932 beq LAF54 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1933 cmpa #0xa5 ; TO?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1934 LAF52 bne LAED7 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1935 LAF54 dec FPA0+3 ; are we at the right index?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1936 bne LAF5D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1937 puls b ; get TO/SUB token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1938 jmp LAE88 ; go do GOTO or GOSUB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1939 LAF5D jsr GETNCH ; munch a character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1940 bsr LAF67 ; parse line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1941 cmpa #', ; is there another line following?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1942 beq LAF54 ; brif so - see if we're there yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1943 puls b,pc ; clean up TO/SUB token and return - we fell through
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1944 ; Parse a line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1945 LAF67 ldx ZERO ; initialize line number accumulator to 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1946 stx BINVAL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1947 LAF6B bcc LAFCE ; brif not numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1948 suba #'0 ; adjust to actual value of digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1949 sta CHARAC ; save digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1950 ldd BINVAL ; get accumulated number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1951 cmpa #24 ; will this overflow?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1952 bhi LAF52 ; brif so - raise syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1953 aslb ; times 2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1954 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1955 aslb ; times 4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1956 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1957 addd BINVAL ; times 5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1958 aslb ; times 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1959 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1960 addb CHARAC ; add in digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1961 adca #0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1962 std BINVAL ; save new accumulated number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1963 jsr GETNCH ; fetch next character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1964 bra LAF6B ; process next digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1965 ; LET command (the LET keyword requires Extended Basic)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1966 LET jsr LB357 ; evaluate destination variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1967 stx VARDES ; save descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1968 ldb #0xb3 ; make sure we have =
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1969 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1970 lda VALTYP ; get destination variable type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1971 pshs a ; save it for later
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1972 jsr LB156 ; evaluate the expression to assign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1973 puls a ; get back original variable type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1974 rora ; put type in C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1975 jsr LB148 ; make sure the current result matches the type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1976 lbeq LBC33 ; bri fnumeric - copy FPA0 to variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1977 LAFA4 ldx FPA0+2 ; point to descriptor of replacement string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1978 ldd FRETOP ; get bottom of string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1979 cmpd 2,x ; is the string already in string space?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1980 bhs LAFBE ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1981 cmpx VARTAB ; is the descriptor in variable space?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1982 blo LAFBE ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1983 LAFB1 ldb ,x ; get length of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1984 jsr LB50D ; allocate space for this string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1985 ldx V4D ; get descriptor pointer back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1986 jsr LB643 ; copy string into string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1987 ldx #STRDES ; point to temporary string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1988 LAFBE stx V4D ; save descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1989 jsr LB675 ; remove string from string stack if appropriate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1990 ldu V4D ; get back replacement descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1991 ldx VARDES ; get target descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1992 pulu a,b,y ; get string length (A) and data pointer (Y)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1993 sta ,x ; save new length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1994 sty 2,x ; save new pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1995 LAFCE rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1996 ; READ and INPUT commands.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1997 LAFCF fcc '?REDO' ; The ?REDO message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1998 fcb 0x0d,0x00
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1999 LAFD6 ldb #2*17 ; bad file data code
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2000 tst DEVNUM ; are we reading from the keyboard?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2001 beq LAFDF ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2002 LAFDC jmp LAC46 ; raise the error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2003 LAFDF lda INPFLG ; are we doing INPUT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2004 beq LAFEA ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2005 ldx DATTXT ; get line number where the DATA statement happened
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2006 stx CURLIN ; set current line number to that so can report the correct location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2007 jmp LB277 ; raise a syntax error on bad data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2008 LAFEA ldx #LAFCF-1 ; show the ?REDO if we're doing INPUT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2009 jsr LB99C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2010 ldx TINPTR ;* reset input pointer to start of statement (this will cause the
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2011 stx CHARAD ;* INPUT statement to be re-executed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2012 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2013 INPUT ldb #11*2 ; code for illegal direct statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2014 ldx CURLIN ; are we in immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2015 leax 1,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2016 beq LAFDC ; brif so - raise ID error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2017 bsr LB002 ; go do the INPUT thing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2018 clr DEVNUM ; reset device to screen/keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2019 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2020 LB002 cmpa #'# ; is there a device number?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2021 bne LB00F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2022 jsr LA5A5 ; parse device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2023 jsr LA3ED ; make sure it's valid for input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2024 jsr LB26D ; make sure we have a comma after the device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2025 LB00F cmpa #'" ; is there a prompt string?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2026 bne LB01E ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2027 jsr LB244 ; parse the prompt string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2028 ldb #'; ; make sure we have a semicolon after the prompt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2029 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2030 jsr LB99F ; print the prompt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2031 LB01E ldx #LINBUF ; point to line input buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2032 clr ,x ; NUL first byte to indicate no data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2033 tst DEVNUM ; is it keyboard input?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2034 bne LB049 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2035 bsr LB02F ; read a line from the keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2036 ldb #', ; put a comma at the start of the buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2037 stb ,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2038 bra LB049 ; go process some input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2039 LB02F jsr LB9AF ; send a ?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2040 jsr LB9AC ; send a space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2041 LB035 jsr LA390 ; read input from the keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2042 bcc LB03F ; brif not BREAK
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2043 leas 4,s ; clean up stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2044 LB03C jmp LAE11 ; go process BREAK
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2045 LB03F ldb #2*23 ; input past end of file error code
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2046 tst CINBFL ; was it EOF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2047 bne LAFDC ; brif so - raise the error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2048 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2049 READ ldx DATPTR ; fetch current DATA pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2050 skip1lda ; set A to nonzero (for READ)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2051 LB049 clra ; set A to zero (for INPUT)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2052 sta INPFLG ; record whether we're doing READ or INPUT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2053 stx DATTMP ; save current input location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2054 LB04E jsr LB357 ; evaluate a variable (destination of data)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2055 stx VARDES ; save descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2056 ldx CHARAD ; save interpreter input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2057 stx BINVAL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2058 ldx DATTMP ; get data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2059 lda ,x ; is there anything to read?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2060 bne LB069 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2061 lda INPFLG ; is it INPUT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2062 bne LB0B9 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2063 jsr RVEC10 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2064 jsr LB9AF ; send a ? (so subsequent lines get ??)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2065 bsr LB02F ; go read an input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2066 LB069 stx CHARAD ; save data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2067 jsr GETNCH ; fetch next data character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2068 ldb VALTYP ; do we want a number?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2069 beq LB098 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2070 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2071 sta CHARAC ; save initial character as the delimiter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2072 cmpa #'" ; do we have a string delimiter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2073 beq LB08B ; brif so - use " as both delimiters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2074 leax -1,x ; back up input if we don't have a delimiter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2075 clra ; set delimiter to NUL (end of line)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2076 sta CHARAC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2077 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2078 tst PRTDEV ; is it a file type device?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2079 bne LB08B ; brif so - use two NULs
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2080 lda #': ; use colon as one delimiter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2081 sta CHARAC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2082 lda #', ; and use comma as the other
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2083 LB08B sta ENDCHR ; save second terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2084 jsr LB51E ; parse out the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2085 jsr LB249 ; move input pointer past the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2086 jsr LAFA4 ; assign the string to the variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2087 bra LB09E ; go see if there's more to read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2088 LB098 jsr LBD12 ; parse a numeric string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2089 jsr LBC33 ; assign the numbe to the variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2090 LB09E jsr GETCCH ; get current input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2091 beq LB0A8 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2092 cmpa #', ; check for comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2093 lbne LAFD6 ; brif not - we have bad data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2094 LB0A8 ldx CHARAD ; get current data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2095 stx DATTMP ; save the data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2096 ldx BINVAL ; restore the interpreter input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2097 stx CHARAD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2098 jsr GETCCH ; get current input from program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2099 beq LB0D5 ; brif end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2100 jsr LB26D ; make sure there's a comma between variables
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2101 bra LB04E ; go read another item
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2102 LB0B9 stx CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2103 jsr LAEE8 ; search for end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2104 leax 1,x ; move past end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2105 tsta ; was it end of line?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2106 bne LB0CD ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2107 ldb #2*3 ; code for out of data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2108 ldu ,x++ ; get pointer to next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2109 beq LB10A ; brif end of program - raise OD error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2110 ldd ,x++ ; get line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2111 std DATTXT ; record it for raising errors in DATA statements
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2112 LB0CD lda ,x ; do we have a DATA statement?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2113 cmpa #0x86
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2114 bne LB0B9 ; brif not - keep scanning
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2115 bra LB069 ; go process the input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2116 LB0D5 ldx DATTMP ; get data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2117 ldb INPFLG ; were we doing READ?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2118 lbne LADE8 ; brif so - save DATA pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2119 lda ,x ; is there something after the input in the input buffer?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2120 beq LB0E7 ; brif not - we consumed everything
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2121 ldx #LB0E8-1 ; print the ?EXTRA IGNORED message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2122 jmp LB99C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2123 LB0E7 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2124 LB0E8 fcc '?EXTRA IGNORED'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2125 fcb 0x0d,0x00
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2126 ; NEXT command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2127 NEXT bne LB0FE ; brif argument given
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2128 ldx ZERO ; set to NULL descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2129 bra LB101 ; go process "any index will do"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2130 LB0FE jsr LB357 ; evaluate the variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2131 LB101 stx VARDES ; save the index we're looking for
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2132 jsr LABF9 ; search the stack for the matching frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2133 beq LB10C ; brif we found a matching frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2134 ldb #0 ; code for NEXT without FOR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2135 LB10A bra LB153 ; raise the error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2136 LB10C tfr x,s ; reset the stack to the start of the stack frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2137 leax 3,x ; point to the STEP value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2138 jsr LBC14 ; copy the value to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2139 lda 8,s ; get step direction
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2140 sta FP0SGN ; save as sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2141 ldx VARDES ; point to index variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2142 jsr LB9C2 ; add (X) to FPA0 (steps the index)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2143 jsr LBC33 ; save new value to the index
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2144 leax 9,s ; point to terminal condition
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2145 jsr LBC96 ; compare the new index value with the terminal
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2146 subb 8,s ; set B=0 if we hit the terminal (or passed it with nonzero step)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2147 beq LB134 ; brif loop complete
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2148 ldx 14,s ; restore line number and input pointer to start of loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2149 stx CURLIN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2150 ldx 16,s
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2151 stx CHARAD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2152 LB131 jmp LAD9E ; return to interpretation loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2153 LB134 leas 18,s ; remove the frame from the stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2154 jsr GETCCH ; get character after the index
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2155 cmpa #', ; do we have more indexes?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2156 bne LB131 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2157 jsr GETNCH ; munch the comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2158 bsr LB0FE ; go process another value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2159 ; NOTE: despite the BSR on the preceding line, execution of the NEXT command will not fall
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2160 ; through this point, nor will the stack grow without bound. The BSR is required to make sure
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2161 ; the stack is aligned properly for the stack search for the subsequent index variable.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2162 ;
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2163 ; The following is the expression evaluation system. It has various entry points including for type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2164 ; checking. This really consists of two co-routines, one for evaluating operators and one for individual
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2165 ; terms. However, it does some rather confusing stack operations so it's a bit difficult to follow
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2166 ; just how some of this works.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2167 ;
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2168 ; Evaluate numeric expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2169 LB141 bsr LB156 ; evaluate an expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2170 ; TM error if string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2171 LB143 andcc #0xfe ; clear C to indicate we want a number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2172 skip2keepc
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2173 ; TM error if numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2174 LB146 orcc #1 ; set C to indicate we want a string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2175 ; TM error if: C = 1 and number, OR C = 0 and string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2176 LB148 tst VALTYP ; set flags on the current value to (doesn't change C)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2177 bcs LB14F ; brif we want a string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2178 bpl LB0E7 ; brif we have a number (we want a number)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2179 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2180 LB14F bmi LB0E7 ; brif we have a string (we want a string)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2181 LB151 ldb #12*2 ; code for TM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2182 LB153 jmp LAC46 ; raise the error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2183 ; The general expression evaluation entry point
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2184 LB156 bsr LB1C6 ; back up input pointer to compensate for GETNCH below
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2185 LB158 clra ; set operator precedence to 0 (no previous operator)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2186 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2187 LB15A pshs b ; save relational operator flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2188 pshs a ; save previous operator precedence
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2189 ldb #1 ; make sure we aren't overflowing the stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2190 jsr LAC33
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2191 jsr LB223 ; go evaluate the first term
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2192 LB166 clr TRELFL ; flag no relational operators seen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2193 LB168 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2194 LB16A suba #0xb2 ; token for > (lowest relational operator)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2195 blo LB181 ; brif below relational operators
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2196 cmpa #3 ; there are three relational operators, is it one?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2197 bhs LB181 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2198 cmpa #1 ; set C if >
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2199 rola ; shift C into bit 0 (4: <, 2: =, 1: >)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2200 eora TRELFL ; flip the bit for this operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2201 cmpa TRELFL ; did the result get lower?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2202 blo LB1DF ; brif so - we have a duplicate so raise an error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2203 sta TRELFL ; save new operator flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2204 jsr GETNCH ; munch the operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2205 bra LB16A ; go see if we have another one
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2206 LB181 ldb TRELFL ; do we have a relational comparison?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2207 bne LB1B8 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2208 lbcc LB1F4 ; brif the token is above the relational operators
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2209 adda #7 ; put operators starting at 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2210 bhs LB1F4 ; brif we're above 0 - it's an operator, Jim
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2211 adca VALTYP ; add carry, numeric flag, and modified token number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2212 lbeq LB60F ; brif we have string and A is + - do concatenation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2213 adca #-1 ; restore operator number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2214 pshs a ; save operator number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2215 asla ; times 2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2216 adda ,s+ ; and times 3 (3 bytes per entry)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2217 ldx #LAA51 ; point to operator pecedence and jump table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2218 leax a,x ; point to correct entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2219 LB19F puls a ; get precedence of previous operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2220 cmpa ,x ; is hit higher (or same) than the current one?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2221 bhs LB1FA ; brif so - we need to process that operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2222 bsr LB143 ; TM error if we have a string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2223 LB1A7 pshs a ; save previous operation precedence
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2224 bsr LB1D4 ; push operator handler address and FPA0 onto the stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2225 ldx RELPTR ; get pointer to arithmetic/logical table entry for last operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2226 puls a ; get back precedence
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2227 bne LB1CE ; brif we had a relational operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2228 tsta ; check precedence of previous operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2229 lbeq LB220 ; brif end of expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2230 bra LB203 ; go handle operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2231 LB1B8 asl VALTYP ; get type of value to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2232 rolb ; mix it in to bit 0 of relational flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2233 bsr LB1C6 ; back up input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2234 ldx #LB1CB ; point to relational operator precedence and handler
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2235 stb TRELFL ; save relational comparison flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2236 clr VALTYP ; result will be numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2237 bra LB19F ; to process the operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2238 LB1C6 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2239 jmp LAEBB ; back it up one and put it back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2240 LB1CB fcb 0x64 ; precedence of relational comparison
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2241 fdb LB2F4 ; handler address for relational comparison
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2242 LB1CE cmpa ,x ; is last done operation higher (or same) precedence?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2243 bhs LB203 ; brif so - go process it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2244 bra LB1A7 ; go push things on the stack and process this operation otherwise
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2245 LB1D4 ldd 1,x ; get address of operatorroutine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2246 pshs d ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2247 bsr LB1E2 ; push FPA0 onto the stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2248 ldb TRELFL ; get back relational operator flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2249 lbra LB15A ; go evaluate another operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2250 LB1DF jmp LB277 ; raise a syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2251 LB1E2 ldb FP0SGN ; get sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2252 lda ,x ; get precedence of this operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2253 LB1E6 puls y ; get back original caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2254 pshs b ; save sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2255 LB1EA ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2256 ldx FPA0 ; get mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2257 ldu FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2258 pshs u,x,b ; stow FPA0 sign and mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2259 jmp ,y ; return to caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2260 LB1F4 ldx ZERO ; point to dummy value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2261 lda ,s+ ; get precedence of previous operation (and set flags)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2262 beq LB220 ; brif end of expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2263 LB1FA cmpa #0x64 ; relational operation?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2264 beq LB201 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2265 jsr LB143 ; type mismatch if string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2266 LB201 stx RELPTR ; save pointer to operator routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2267 LB203 puls b ; get relational flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2268 cmpa #0x5a ; NOT operation?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2269 beq LB222 ; brif so (it was unary)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2270 cmpa #0x7d ; unary negation?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2271 beq LB222 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2272 lsrb ; shift value type flag out of relational flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2273 stb RELFLG ; save relational operator flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2274 puls a,x,u ; get FP value back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2275 sta FP1EXP ; set exponent and mantissa in FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2276 stx FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2277 stu FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2278 puls b ; and the sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2279 stb FP1SGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2280 eorb FP0SGN ; set RESSGN if the two operand signs differ
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2281 stb RESSGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2282 LB220 ldb FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2283 LB222 rts ; return or transfer control to operator handler routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2284 LB223 jsr RVEC15 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2285 clr VALTYP ; set type to numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2286 LB228 jsr GETNCH ; get first character in the term
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2287 bcc LB22F ; brif not numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2288 LB22C jmp LBD12 ; parse a number (and return)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2289 LB22F jsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2290 bcc LB284 ; brif alpha character (variable)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2291 cmpa #'. ; decimal point?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2292 beq LB22C ; brif so - evaluate number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2293 cmpa #0xac ; minus?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2294 beq LB27C ; brif so - process unary negation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2295 cmpa #0xab ; plus?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2296 beq LB228 ; brif so - ignore unary "posation"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2297 cmpa #'" ; string delimiter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2298 bne LB24E ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2299 LB244 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2300 jsr LB518 ; go parse the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2301 LB249 ldx COEFPT ; get address of end of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2302 stx CHARAD ; move input pointer past string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2303 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2304 LB24E cmpa #0xa8 ; NOT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2305 bne LB25F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2306 lda #0x5a ; precedence of unary NOT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2307 jsr LB15A ; process the operand of NOT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2308 jsr INTCNV ; convert to integer in D
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2309 coma ; do a bitwise complement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2310 comb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2311 jmp GIVABF ; resturn the result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2312 LB25F inca ; is it a function token?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2313 beq LB290 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2314 LB262 bsr LB26A ; only other legal thing must be a (expr)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2315 jsr LB156 ; evaluate parentheticized expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2316 LB267 ldb #') ; force a )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2317 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2318 LB26A ldb #'( ; force a (
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2319 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2320 LB26D ldb #', ; force a ,
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2321 LB26F cmpb [CHARAD] ; does character match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2322 bne LB277 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2323 jmp GETNCH ; each the character and return the next
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2324 LB277 ldb #2*1 ; raise syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2325 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2326 LB27C lda #0x7d ; unary negation precedence
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2327 jsr LB15A ; evaluate argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2328 jmp LBEE9 ; flip sign of FPA0 and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2329 LB284 jsr LB357 ; evaluate variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2330 LB287 stx FPA0+2 ; save descriptor address in FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2331 lda VALTYP ; test variable type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2332 bne LB222 ; brif string - we're done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2333 jmp LBC14 ; copy FP number from (X) into FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2334 LB290 jsr GETNCH ; get the actual token number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2335 tfr a,b ; save it (for offsetting X)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2336 lslb ; two bytes per jump table entry (and lose high bit)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2337 jsr GETNCH ; eat the token byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2338 cmpb #2*19 ; is it a valid token for Color Basic?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2339 bls LB29F ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2340 jmp [COMVEC+18] ; transfer control to Extended Basic if not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2341 LB29F pshs b ; save jump table offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2342 cmpb #2*14 ; does it expect a numeric argument?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2343 blo LB2C7 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2344 cmpb #2*18 ; does it need no arguments?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2345 bhs LB2C9 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2346 bsr LB26A ; force a (
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2347 lda ,s ; get token value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2348 cmpa #2*17 ; is it POINT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2349 bhs LB2C9 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2350 jsr LB156 ; evaluate first argument string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2351 bsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2352 jsr LB146 ; TM error if string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2353 puls a ; get token value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2354 ldu FPA0+2 ; get string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2355 pshs u,a ; now we save the first string argument and the token value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2356 jsr LB70B ; evaluate first numeric argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2357 puls a ; get back token value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2358 pshs b,a ; save second argument and token value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2359 fcb 0x8e ; opcode of LDX immediate (skips two bytes)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2360 LB2C7 bsr LB262 ; force a (
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2361 LB2C9 puls b ; get offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2362 ldx COMVEC+8 ; get jump table pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2363 abx ; add offset into table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2364 jsr [,x] ; go process function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2365 jmp LB143 ; make sure result is numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2366 ; operator OR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2367 LB2D4 skip1lda ; set flag to nonzero to signal OR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2368 ; operator AND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2369 LB2D5 clra ; set flag to zero to signal AND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2370 sta TMPLOC ; save AND/OR flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2371 jsr INTCNV ; convert second argument to intenger
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2372 std CHARAC ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2373 jsr LBC4A ; move first argument to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2374 jsr INTCNV ; convert first argument to integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2375 tst TMPLOC ; is it AND or OR?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2376 bne LB2ED ; brif OR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2377 anda CHARAC ; do the bitwise AND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2378 andb ENDCHR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2379 bra LB2F1 ; finish up
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2380 LB2ED ora CHARAC ; do the bitwise OR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2381 orb ENDCHR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2382 LB2F1 jmp GIVABF ; return integer result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2383 ; relational comparision operators
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2384 LB2F4 jsr LB148 ; TM error if type mismatch
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2385 BNE LB309 ; brif we have a string comparison
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2386 lda FP1SGN ; pack FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2387 ora #0x7f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2388 anda FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2389 sta FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2390 ldx #FP1EXP ; point to packed FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2391 jsr LBC96 ; compare FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2392 bra LB33F ; handle truth comparison
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2393 LB309 clr VALTYP ; the result of a comparison is always a number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2394 dec TRELFL ; remove the string flag from the comparison data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2395 jsr LB657 ; get string details for second argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2396 stb STRDES ; save them in the temporary string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2397 stx STRDES+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2398 ldx FPA1+2 ; get pointer to first argument descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2399 jsr LB659 ; get string details for second argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2400 lda STRDES ; get length of second argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2401 pshs b ; save length of first argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2402 suba ,s+ ; now A is the difference in string lengths
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2403 beq LB328 ; brif string lengths are equal
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2404 lda #1 ; flag for second argument is longer than first
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2405 bcc LB328 ; brif second string is longer than first
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2406 ldb STRDES ; get length of second string (shorter)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2407 nega ; invert default comparison result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2408 LB328 sta FP0SGN ; save default truth flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2409 ldu STRDES+2 ; get pointer to start of second string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2410 incb ; compensate for DECB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2411 LB32D decb ; have we compared everything?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2412 bne LB334 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2413 ldb FP0SGN ; get default truth value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2414 bra LB33F ; decide comparison truth
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2415 LB334 lda ,x+ ; get byte from first argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2416 cmpa ,u+ ; compare with second argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2417 beq LB32D ; brif equal - keep comparing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2418 ldb #0xff ; negative if first string is > second
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2419 bcc LB33F ; brif string A > string B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2420 negb ; invert result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2421 LB33F addb #1 ; convert to 0,1,2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2422 rolb ; shift left - now it's 4,2,1 for <, =, >
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2423 andb RELFLG ; keep only the truth we care about
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2424 beq LB348 ; brif no matching bits - it's false
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2425 ldb #0xff ; set true
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2426 LB348 jmp LBC7C ; convert result to FP and return it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2427 ; DIM command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2428 LB34B jsr LB26D ; make sure there's a comma between variables
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2429 DIM ldb #1 ; flag that we're dimensioning
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2430 bsr LB35A ; go allocate the variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2431 jsr GETCCH ; are we done?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2432 bne LB34B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2433 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2434 ; This routine parses a variable. For scalars, it will return a NULL string or 0 value number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2435 ; if it is called from "evaluate term". Otherwise, it allocates the variable. For arrays, it will
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2436 ; allocate a default sized array if dimensioning is not underway and then attempt to look up
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2437 ; the requested coordinates in that array. Otherwise, it will allocate an array based on the
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2438 ; specified dimension values.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2439 LB357 clrb ; flag that we're not setting up an array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2440 jsr GETCCH
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2441 LB35A stb DIMFLG ; save dimensioning flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2442 sta VARNAM ; save first character of variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2443 jsr GETCCH ; get input character (why? we already have it)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2444 bsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2445 lbcs LB277 ; brif our variable doesn't start with a letter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2446 clrb ; default second variable character to NUL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2447 stb VALTYP ; set value type to numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2448 jsr GETNCH ; get second character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2449 bcs LB371 ; brif numeric - numbers are allowed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2450 bsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2451 bcs LB37B ; brif not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2452 LB371 tfr a,b ; save set second character of variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2453 LB373 jsr GETNCH ; get an input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2454 bcs LB373 ; brif numeric - still in variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2455 bsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2456 bcc LB373 ; brif alpha - still in variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2457 LB37B cmpa #'$ ; do we have the string sigil?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2458 bne LB385 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2459 com VALTYP ; set value type to string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2460 addb #0x80 ; set bit 7 of second variable character to indicate string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2461 jsr GETNCH ; eat the sigil
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2462 LB385 stb VARNAM+1 ; save second variable name character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2463 ora ARYDIS ; merge array disable flag (will set bit 7 of input character if no arrays)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2464 suba #'( ; do we have a subscript?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2465 lbeq LB404 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2466 clr ARYDIS ; disable the array disable flag - it's single use
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2467 ldx VARTAB ; point to the start of the variable table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2468 ldd VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2469 LB395 cmpx ARYTAB ; are we at the top of the variable table?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2470 beq LB3AB ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2471 cmpd ,x++ ; does the variable name match (and move pointer to variable data)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2472 beq LB3DC ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2473 leax 5,x ; move to next table entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2474 bra LB395 ; see if we have a match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2475 ; Set carry if not upper case alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2476 LB3A2 cmpa #'A ; set C if less than A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2477 bcs LB3AA ; brif less than A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2478 suba #'Z+1 ; set C if greater than Z
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2479 suba #-('Z+1)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2480 LB3AA rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2481 LB3AB ldx #ZERO ; point to empty location (NULL/0 value)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2482 ldu ,s ; get caller address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2483 cmpu #LB287 ; coming from "evaluate term"?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2484 beq LB3DE ; brif so - don't allocate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2485 ldd ARYEND ; get end of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2486 std V43 ; save as top of source block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2487 addd #7 ; 7 bytes per scalar entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2488 std V41 ; save as top of destination block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2489 ldx ARYTAB ; get bottom of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2490 stx V47 ; save as bottom of source block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2491 jsr LAC1E ; move the arrays up to make a hole
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2492 ldx V41 ; get new top of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2493 stx ARYEND ; set new end of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2494 ldx V45 ; get bottom of destination block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2495 stx ARYTAB ; set as new start of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2496 ldx V47 ; get old end of variables
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2497 ldd VARNAM ; get name of variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2498 std ,x++ ; set variable name and advance X to the value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2499 clra ; zero out the variable value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2500 clrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2501 std ,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2502 std 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2503 sta 4,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2504 LB3DC stx VARPTR ; save descriptor address of return value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2505 LB3DE rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2506 ; Various integer conversion routines
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2507 LB3DF fcb 0x90,0x80,0x00,0x00,0x00 ; FP constant -32768
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2508 LB3E4 jsr GETNCH ; fetch input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2509 LB3E6 jsr LB141 ; evaluate numeric expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2510 LB3E9 lda FP0SGN ; get sign of value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2511 bmi LB44A ; brif negative (raise FC error)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2512 INTCNV lda FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2513 cmpa #0x90 ; is it within the range for a 16 bit integer?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2514 blo LB3FE ; brif smaller than 32768
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2515 ldx #LB3DF ; point to -32678 constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2516 jsr LBC96 ; is FPA0 equal to -32768?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2517 bne LB44A ; brif not - magnitude is too far negative
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2518 LB3FE jsr LBCC8 ; move binary point to the right of FPA0 and correct sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2519 ldd FPA0+2 ; get the resulting integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2520 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2521 LB404 ldb DIMFLG ; get dimensioning flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2522 lda VALTYP ; get type of variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2523 pshs b,a ; save them (to avoid issues while evaluating dimension values)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2524 clrb ; reset dimension counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2525 LB40A ldx VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2526 pshs x,b ; save dimension counter and variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2527 bsr LB3E4 ; evaluate a dimension value (and skip either ( or ,)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2528 puls b,x,y ; get variable name, dimension counter, and dimensioning/type flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2529 stx VARNAM ; restore variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2530 ldu FPA0+2 ; get dimension size/index
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2531 pshs u,y ; save dimension size and dimensioning/type flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2532 incb ; bump dimension counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2533 jsr GETCCH ; get what's after the dimension count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2534 cmpa #', ; do we have another dimension?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2535 beq LB40A ; brif so - parse it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2536 stb TMPLOC ; save dimension counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2537 jsr LB267 ; make sure we have a )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2538 puls a,b ; get back variable type and dimensioning flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2539 sta VALTYP ; restore variable type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2540 stb DIMFLG ; restore dimensioning flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2541 ldx ARYTAB ; get start of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2542 LB42A cmpx ARYEND ; are we at the end of the array table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2543 beq LB44F ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2544 ldd VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2545 cmpd ,x ; does it match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2546 beq LB43B ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2547 ldd 2,x ; get length of this array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2548 leax d,x ; move to next array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2549 bra LB42A ; go check another entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2550 LB43B ldb #2*9 ; code for redimensioned array error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2551 lda DIMFLG ; are we dimensioning?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2552 bne LB44C ; brif so - raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2553 ldb TMPLOC ; get number of dimensions given
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2554 cmpb 4,x ; does it match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2555 beq LB4A0 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2556 LB447 ldb #8*2 ; raise "bad subscript"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2557 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2558 LB44A ldb #4*2 ; raise "illegal function call"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2559 LB44C jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2560 LB44F ldd #5 ; 5 bytes per array entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2561 std COEFPT ; initialize array size to entry size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2562 ldd VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2563 std ,x ; set array name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2564 ldb TMPLOC ; get dimension count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2565 stb 4,x ; set dimension count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2566 jsr LAC33 ; make sure we haven't overflowed memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2567 stx V41 ; save array descriptor address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2568 LB461 ldb #11 ; default dimension value (zero-based, gives max index of 10)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2569 clra ; zero extend (??? why not LDD above?)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2570 tst DIMFLG ; are we dimensioning?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2571 beq LB46D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2572 puls a,b ; get dimension size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2573 addd #1 ; account for zero based indexing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2574 LB46D std 5,x ; save dimension size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2575 bsr LB4CE ; multiply by accumulated array size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2576 std COEFPT ; save new array size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2577 leax 2,x ; move to next dimension
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2578 dec TMPLOC ; have we done all dimensions?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2579 bne LB461 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2580 stx TEMPTR ; save end of array descriptor (minus 5)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2581 addd TEMPTR ; add total size of array to address of descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2582 lbcs LAC44 ; brif it overflows memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2583 tfr d,x ; save end of array for later
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2584 jsr LAC37 ; does array fit in memory?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2585 subd #STKBUF-5 ; subtract out the "stack fudge factor" but add 5 to the result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2586 std ARYEND ; save new end of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2587 clra ; set up for clearing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2588 LB48C leax -1,x ; move back one
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2589 sta 5,x ; blank out a byte in the array data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2590 cmpx TEMPTR ; have we reached the array header?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2591 bne LB48C ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2592 ldx V41 ; get address of start of descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2593 lda ARYEND ; get MSB of end of array back (B still has LSB)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2594 subd V41 ; subtract start of descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2595 std 2,x ; save length of array in array header
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2596 lda DIMFLG ; are we dimensioning?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2597 bne LB4CD ; brif so - we're done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2598 LB4A0 ldb 4,x ; get number of dimensions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2599 stb TMPLOC ; initialize counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2600 clra ; initialize accumulated offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2601 clrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2602 LB4A6 std COEFPT ; save accumulated offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2603 puls a,b ; get desired index
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2604 std FPA0+2 ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2605 cmpd 5,x ; is it in range for this dimension?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2606 bhs LB4EB ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2607 ldu COEFPT ; get accumulated offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2608 beq LB4B9 ; brif first dimension
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2609 bsr LB4CE ; multiply accumulated offset by dimension length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2610 addd FPA0+2 ; add in offset into this dimension
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2611 LB4B9 leax 2,x ; move to next dimension in header
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2612 dec TMPLOC ; done all dimensions?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2613 bne LB4A6 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2614 std ,--s ; save D for multiply by 5 (should be pshs d)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2615 aslb ; times 2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2616 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2617 aslb ; times 4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2618 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2619 addd ,s++ ; times 5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2620 leax d,x ; add in offset from start of array data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2621 leax 5,x ; offset to end of header
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2622 stx VARPTR ; save pointer to element data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2623 LB4CD rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2624 ; multiply 16 bit number at 5,x by the 16 bit number in COEFPT; return result in D; BS error if carry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2625 LB4CE lda #16 ; 16 shifts to do a multiply
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2626 sta V45 ; save shift counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2627 ldd 5,x ; get multiplier
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2628 std BOTSTK ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2629 clra ; zero out product
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2630 clrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2631 LB4D8 aslb ; shift product left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2632 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2633 bcs LB4EB ; brif we have a carry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2634 asl COEFPT+1 ; shift other factor left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2635 rol COEFPT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2636 bcc LB4E6 ; brif no carry - this bit position is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2637 addd BOTSTK ; add in multiplier at this bit position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2638 bcs LB4EB ; brif carry - do an error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2639 LB4E6 dec V45 ; have we done all 16 bits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2640 bne LB4D8 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2641 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2642 LB4EB jmp LB447 ; raise a BS error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2643 ; MEM function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2644 ; BUG: this doesn't account for the STKBUF fudge factor used for memory availability checks
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2645 MEM tfr s,d ; get stack pointer where we can do math
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2646 subd ARYEND ; calculate number of bytes between the stack and the top of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2647 skip1 ; return result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2648 ; Convert unsigned value in B to FP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2649 LB4F3 clra ; zero extend
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2650 ; Convert signed value in D to FP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2651 GIVABF clr VALTYP ; set value type to numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2652 std FPA0 ; save value in FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2653 ldb #0x90 ; exponent for top two bytes to be an integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2654 jmp LBC82 ; finish conversion to integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2655 ; STR$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2656 STR jsr LB143 ; make sure we have a number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2657 ldu #STRBUF+2 ; convert FP number to string in temporary string buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2658 jsr LBDDC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2659 leas 2,s ; don't return to the function evaluator (which will do a numeric type check)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2660 ldx #STRBUF+1 ; point to number string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2661 bra LB518 ; to stash the string in string space and return to the "evaluate term" caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2662 ; Reserve B bytes of string space. Return start in X and FRESPC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2663 LB50D stx V4D ; save X somewhere in case the caller needs it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2664 LB50F bsr LB56D ; allocate string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2665 LB511 stx STRDES+2 ; save pointer to allocated space in the temporary descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2666 stb STRDES ; save length in the temporary descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2667 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2668 LB516 leax -1,x ; move pointer back one (to compensate for the increment below)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2669 ; Scan from X until either NUL or one of the string terminators is found
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2670 LB518 lda #'" ; set terminator to be string delimiter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2671 LB51A sta CHARAC ; set both delimiters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2672 sta ENDCHR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2673 LB51E leax 1,x ; move to next character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2674 stx RESSGN ; save start of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2675 stx STRDES+2 ; save start of string in the temporary string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2676 ldb #-1 ; initialize length counter to -1 (compensate for initial INCB)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2677 LB526 incb ; bump string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2678 lda ,x+ ; get character from string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2679 beq LB537 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2680 cmpa CHARAC ; is it delimiter #1?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2681 beq LB533 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2682 cmpa ENDCHR ; is it delimiter #2?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2683 bne LB526 ; brif not - keep scanning
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2684 LB533 cmpa #'" ; string delimiter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2685 beq LB539 ; brif so - don't move pointer back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2686 LB537 leax -1,x ; move pointer back (so we don't consume the delimiter)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2687 LB539 stx COEFPT ; save end of string address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2688 stb STRDES ; save string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2689 ldu RESSGN ; get start of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2690 cmpu #STRBUF+2 ; is it at the start of the string buffer?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2691 bhi LB54C ; brif so - don't copy it to string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2692 bsr LB50D ; allocate string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2693 ldx RESSGN ; point to beginning of the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2694 jsr LB645 ; copy string data (B bytes) from (X) to (FRESPC)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2695 ; Put temporary string descriptor on the string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2696 LB54C ldx TEMPPT ; get top of string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2697 cmpx #CFNBUF ; is the string stack full?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2698 bne LB558 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2699 ldb #15*2 ; code for "string formula too complex"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2700 LB555 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2701 LB558 lda STRDES ; get string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2702 sta 0,x ; save it in the string stack descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2703 ldd STRDES+2 ; get string data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2704 std 2,x ; save in string stack descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2705 lda #0xff ; set value type to string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2706 sta VALTYP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2707 stx LASTPT ; set pointer to last used entry on the string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2708 stx FPA0+2 ; set pointer to descriptor in the current evaluation value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2709 leax 5,x ; advance string stack pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2710 stx TEMPPT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2711 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2712 ; Reserve B bytes in string space. If there isn't enough space, try compacting string space and
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2713 ; then try the allocation again. If it still fails, raise OS error.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2714 LB56D clr GARBFL ; flag that compaction not yet done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2715 LB56F clra ; zero extend the length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2716 pshs d ; save requested string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2717 ldd STRTAB ; get current bottom of strings
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2718 subd ,s+ ; calculate new bottom of strings and remove zero extension
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2719 cmpd FRETOP ; does the string fit?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2720 blo LB585 ; brif not - try compaction
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2721 std STRTAB ; save new bottom of strings
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2722 ldx STRTAB ; get bottom of strings
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2723 leax 1,x ; now X points to the real start of the allocated space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2724 stx FRESPC ; save the string pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2725 puls b,pc ; restore length and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2726 LB585 ldb #2*13 ; code for out of string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2727 com GARBFL ; have we compacted string space yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2728 beq LB555 ; brif so - raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2729 bsr LB591 ; compact string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2730 puls b ; get back string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2731 bra LB56F ; go try allocation again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2732 ; Compact string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2733 ; This is an O(n^2) algorithm. It first searches all extant strings for the highest address data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2734 ; that hasn't already been moved into the freshly compacted string space. If then moves that string data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2735 ; up to the highest address it can go to. It repeats this process over and over until it finds no string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2736 ; that isn't already in the compacted space. While doing this, it has to search all strings on the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2737 ; stack (this is why the string stack is needed - so we can track anonymous strings), all scalar string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2738 ; variables, and every entry in every string array.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2739 LB591 ldx MEMSIZ ; get to of string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2740 LB593 stx STRTAB ; save top of uncompacted stringspace
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2741 clra ; zero out D and reset pointer to discovered variable to NULL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2742 clrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2743 std V4B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2744 ldx FRETOP ; point to bottom of string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2745 stx V47 ; save as lowest match address (match will be higher)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2746 ldx #STRSTK ; point to start of string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2747 LB5A0 cmpx TEMPPT ; are we at the top of the string stack?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2748 beq LB5A8 ; brif so - done with the string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2749 bsr LB5D8 ; check for string in uncompacted space (and advance pointer)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2750 bra LB5A0 ; check another on the string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2751 LB5A8 ldx VARTAB ; point to start of scalar variables
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2752 LB5AA cmpx ARYTAB ; end of scalars?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2753 beq LB5B2 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2754 bsr LB5D2 ; check for string in uncompacted space and advance pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2755 bra LB5AA ; check another variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2756 LB5B2 stx V41 ; save address of end of variables (address of first array)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2757 LB5B4 ldx V41 ; get start of the next array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2758 LB5B6 cmpx ARYEND ; end of arrays?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2759 beq LB5EF ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2760 ldd 2,x ; get length of array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2761 addd V41 ; add to start of array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2762 std V41 ; save address of next array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2763 lda 1,x ; get second character of variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2764 bpl LB5B4 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2765 ldb 4,x ; get number of dimensions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2766 aslb ; two bytes per dimension size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2767 addb #5 ; add in fixed overhead for array descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2768 abx ; now X points to first array element
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2769 LB5CA cmpx V41 ; at the start of the next array?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2770 beq LB5B6 ; brif so - go handle another array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2771 bsr LB5D8 ; check for string in uncompacted space (and advance pointer)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2772 bra LB5CA ; process next array element
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2773 LB5D2 lda 1,x ; get second character of variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2774 leax 2,x ; move to variable data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2775 bpl LB5EC ; brif numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2776 LB5D8 ldb ,x ; get length of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2777 beq LB5EC ; brif NULL - don't need to check data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2778 ldd 2,x ; get data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2779 cmpd STRTAB ; is it in compacted string space?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2780 bhi LB5EC ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2781 cmpd V47 ; is it better match than previous best?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2782 bls LB5EC ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2783 stx V4B ; save descriptor address of best match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2784 std V47 ; save new best data pointer match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2785 LB5EC leax 5,x ; move to next descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2786 LB5EE rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2787 LB5EF ldx V4B ; get descriptor address of the matched string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2788 beq LB5EE ; brif we didn't find one - we're done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2789 clra ; zero extend length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2790 ldb ,x ; get string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2791 decb ; subtract one (we won't have a NULL string here)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2792 addd V47 ; now D points to the address of the end of the string data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2793 std V43 ; save as top address of move
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2794 ldx STRTAB ; set top of uncompacted space as destination
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2795 stx V41
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2796 jsr LAC20 ; move string to top of uncompactedspace
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2797 ldx V4B ; point to string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2798 ldd V45 ; get new data pointer address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2799 std 2,x ; update descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2800 ldx V45 ; get bottom of copy destination
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2801 leax -1,x ; move back below it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2802 jmp LB593 ; go search for another string to move (and set new bottom of string space)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2803 ; Concatenate two strings. We come here directly from the operator handler rather than via a JSR.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2804 LB60F ldd FPA0+2 ; get string descriptor for the first string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2805 pshs d ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2806 jsr LB223 ; evaluate a second string (concatenation is left associative)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2807 jsr LB146 ; make sure we have a string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2808 puls x ; get back first string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2809 stx RESSGN ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2810 ldb ,x ; get length of first string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2811 ldx FPA0+2 ; get pointer to second string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2812 addb ,x ; add length of second string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2813 bcc LB62A ; brif combined length is OK
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2814 ldb #2*14 ; raise string too long error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2815 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2816 LB62A jsr LB50D ; reserve room for new string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2817 ldx RESSGN ; get descriptor address of the first string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2818 ldb ,x ; get length of first string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2819 bsr LB643 ; copy it to string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2820 ldx V4D ; get descriptor address of second string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2821 bsr LB659 ; get string details for second string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2822 bsr LB645 ; copy second string into new string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2823 ldx RESSGN ; get pointer to first string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2824 bsr LB659 ; remove it from the string stack if possible
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2825 jsr LB54C ; put new string on the string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2826 jmp LB168 ; return to expression evaluator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2827 ; Copy B bytes to space pointed to by FRESPC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2828 LB643 ldx 2,x ; get source address from string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2829 LB645 ldu FRESPC ; get destination address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2830 incb ; compensate for decb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2831 bra LB64E ; do the copy
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2832 LB64A lda ,x+ ; copy a byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2833 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2834 LB64E decb ; done yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2835 bne LB64A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2836 stu FRESPC ; save destination pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2837 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2838 ; Fetch details of string in FPA0+2 and remove from the string stack if possible
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2839 LB654 jsr LB146 ; make sure we have a string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2840 LB657 ldx FPA0+2 ; get descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2841 LB659 ldb ,x ; get length of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2842 bsr LB675 ; see if it's at the top of the string stack and remove it if so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2843 bne LB672 ; brif not removed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2844 ldx 5+2,x ; get start address of string just removed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2845 leax -1,x ; move pointer down 1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2846 cmpx STRTAB ; is it at the bottom of string space?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2847 bne LB66F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2848 pshs b ; save length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2849 addd STRTAB ; add length to start of strings (A was cleared previously)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2850 std STRTAB ; save new string space start (deallocated space for this string)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2851 puls b ; get back string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2852 LB66F leax 1,x ; restore pointer to pointing at the actual string data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2853 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2854 LB672 ldx 2,x ; get data pointer for the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2855 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2856 ; Remove string pointed to by X from the string stack if it is at the top of the stack; return with
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2857 ; A clear and Z set if string removed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2858 LB675 cmpx LASTPT ; is it at the top of the string stack?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2859 bne LB680 ; brif not - do nothing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2860 stx TEMPPT ; save new top of stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2861 leax -5,x ; move the "last" pointer back as well
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2862 stx LASTPT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2863 clra ; flag string removed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2864 LB680 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2865 ; LEN function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2866 LEN bsr LB686 ; get string details
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2867 LB683 jmp LB4F3 ; return unsigned length in B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2868 LB686 bsr LB654 ; get string details and remove from string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2869 clr VALTYP ; set value type to numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2870 tstb ; set flags according to length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2871 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2872 ; CHR$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2873 CHR jsr LB70E ; get 8 bit unsigned integer to B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2874 LB68F ldb #1 ; allocate a one byte string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2875 jsr LB56D
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2876 lda FPA0+3 ; get character code
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2877 jsr LB511 ; save reserved string details in temp descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2878 sta ,x ; put character in string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2879 LB69B leas 2,s ; don't go back to function handler - avoid numeric type check
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2880 LB69D jmp LB54C ; return temporary string on string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2881 ; ASC function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2882 ASC bsr LB6A4 ; get first character of argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2883 bra LB683 ; return unsigned code in B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2884 LB6A4 bsr LB686 ; fetch string details
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2885 beq LB706 ; brif NULL string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2886 ldb ,x ; get character at start of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2887 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2888 ; LEFT$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2889 LEFT bsr LB6F5 ; get arguments from the stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2890 LB6AD clra ; clear pointer offset (set to start of string)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2891 LB6AE cmpb ,x ; are we asking for more characters than there are in the string?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2892 bls LB6B5 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2893 ldb ,x ; only return the number that are in the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2894 clra ; force starting offset to be the start of the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2895 LB6B5 pshs b,a ; save offset and length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2896 jsr LB50F ; reserve space in string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2897 ldx V4D ; point to original string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2898 bsr LB659 ; get string details
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2899 puls b ; get string offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2900 abx ; now X points to the start of the data to copy
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2901 puls b ; get length of copy
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2902 jsr LB645 ; copy the data to the allocated space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2903 bra LB69D ; return temp string on string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2904 ; RIGHT$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2905 RIGHT bsr LB6F5 ; get arguments from stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2906 suba ,x ; subtract length of original string from desired length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2907 nega ; now A is offset into old string where we start copying
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2908 bra LB6AE ; go handle everything else
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2909 ; MID$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2910 MID ldb #255 ; default length is the whole string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2911 stb FPA0+3 ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2912 jsr GETCCH ; see what we have after offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2913 cmpa #') ; end of function?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2914 beq LB6DE ; brif so - no length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2915 jsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2916 bsr LB70B ; get length parameter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2917 LB6DE bsr LB6F5 ; get string and offset parameters from the stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2918 beq LB706 ; brif we have a 0 offset requested (string offsets are 1-based)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2919 clrb ; clear length counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2920 deca ; subtract one from position parameter (we work on 0-based, param is 1-based)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2921 cmpa ,x ; is start greater than length of string?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2922 bhs LB6B5 ; brif so - return NULL string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2923 tfr a,b ; save absolute position parameter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2924 subb ,x ; now B is postition less length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2925 negb ; now B is amount of string to copy
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2926 cmpb FPA0+3 ; is it less than the length requested?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2927 bls LB6B5 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2928 ldb FPA0+3 ; set length to the requested length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2929 bra LB6B5 ; go finish up copying the substring
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2930 ; Common routine for LEFT$, RIGHT$, MID$ - check for ) and fetch string data and first parameter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2931 ; from the stack. These were evaluated in the function evaluation handler. (It's not clear that doing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2932 ; it that way is actually beneficial. However, this is what the ROM designers did, so here we are.)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2933 LB6F5 jsr LB267 ; make sure we have )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2934 ldu ,s ; get return address - we're going to mess with the stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2935 ldx 5,s ; get address of string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2936 stx V4D ; save descriptor adddress
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2937 lda 4,s ; get first numeric parameter in both A and B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2938 ldb 4,s
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2939 leas 7,s ; clean up stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2940 tfr u,pc ; return to original caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2941 LB706 jmp LB44A ; raise FC error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2942 ; Evaluate an unsigned 8 bit expression to B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2943 LB709 jsr GETNCH ; move to next character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2944 LB70B jsr LB141 ; evaluate a numeric expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2945 LB70E jsr LB3E9 ; convert to integer in D
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2946 tsta ; are we negative or > 255?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2947 bne LB706 ; brif so - FC error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2948 jmp GETCCH ; fetch current input character and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2949 ; VAL function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2950 VAL jsr LB686 ; get string details
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2951 lbeq LBA39 ; brif NULL string - return 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2952 ldu CHARAD ; get input pointer so we can replace it later
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2953 stx CHARAD ; point interpreter at string data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2954 abx ; calculate end address of the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2955 lda ,x ; get byte after the end of the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2956 pshs u,x,a ; save end of string address, input pointer, and character after end of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2957 clr ,x ; put a NUL after the string (stops the number interpreter)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2958 jsr GETCCH ; get input character at start of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2959 jsr LBD12 ; evaluate numeric expression in string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2960 puls a,x,u ; get back saved character and pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2961 sta ,x ; restore byte after string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2962 stu CHARAD ; restore interpeter's input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2963 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2964 ; Evaluate unsigned expression to BINVAL, then evaluate an unsigned expression to B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2965 LB734 bsr LB73D ; evaluate expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2966 stx BINVAL ; save result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2967 LB738 jsr LB26D ; make sure there's a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2968 bra LB70B ; evaluate unsigned expression to B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2969 ; Evaluate unsigned expression in X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2970 LB73D jsr LB141 ; evaluate numeric expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2971 LB740 lda FP0SGN ; is it negative?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2972 bmi LB706 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2973 lda FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2974 cmpa #0x90 ; largest possible exponent for 16 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2975 bhi LB706 ; brif too large
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2976 jsr LBCC8 ; move binary point to right of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2977 ldx FPA0+2 ; get resulting unsigned value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2978 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2979 ; PEEK function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2980 PEEK bsr LB740 ; get address to X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2981 ldb ,x ; get the value at that address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2982 jmp LB4F3 ; return B as unsigned value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2983 ; POKE function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2984 POKE bsr LB734 ; evaluate address and byte value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2985 ldx BINVAL ; get address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2986 stb ,x ; put value there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2987 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2988 ; LLIST command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2989 LLIST ldb #-2 ; set output device to printer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2990 stb DEVNUM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2991 jsr GETCCH ; reset flags for input character and fall through to LIST
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2992 ; LIST command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2993 LIST pshs cc ; save zero flag (end of statement)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2994 jsr LAF67 ; parse line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2995 jsr LAD01 ; find address of that line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2996 stx LSTTXT ; save that address as the start of the list
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2997 puls cc ; get back ent of statement flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2998 beq LB784 ; brif end of line - list whole program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2999 jsr GETCCH ; are we at the end of the line (one number)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3000 beq LB789 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3001 cmpa #0xac ; is it "-"?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3002 bne LB783 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3003 jsr GETNCH ; eat the "-"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3004 beq LB784 ; brif no second number - list to end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3005 jsr LAF67 ; evaluate the second number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3006 beq LB789 ; brif illegal number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3007 LB783 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3008 LB784 ldu #0xffff ; this will cause listing to do the entire program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3009 stu BINVAL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3010 LB789 leas 2,s ; don't return to the caller - we'll jump back to the main loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3011 ldx LSTTXT ; get address of line to list
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3012 LB78D jsr LB95C ; do a newline if needed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3013 jsr LA549 ; do a break check
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3014 ldd ,x ; get address of next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3015 bne LB79F ; brif not end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3016 LB797 jsr LA42D ; close output file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3017 clr DEVNUM ; reset device to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3018 jmp LAC73 ; go back to immediate mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3019 LB79F stx LSTTXT ; save new line address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3020 ldd 2,x ; get line number of this line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3021 cmpd BINVAL ; is it above the end line?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3022 bhi LB797 ; brif so - return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3023 jsr LBDCC ; display line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3024 jsr LB9AC ; put a space after it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3025 ldx LSTTXT ; get line address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3026 bsr LB7C2 ; detokenize the line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3027 ldx [LSTTXT] ; get pointer to next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3028 ldu #LINBUF+1 ; point to start of detokenized line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3029 LB7B9 lda ,u+ ; get byte from detokenized line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3030 beq LB78D ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3031 jsr LB9B1 ; output character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3032 bra LB7B9 ; handle next character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3033 ; Detokenize a line from (X) to the line input buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3034 LB7C2 jsr RVEC24 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3035 leax 4,x ; move past next line pointer and line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3036 ldy #LINBUF+1 ; point to line input buffer (destination)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3037 LB7CB lda ,x+ ; get character from tokenized line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3038 beq LB820 ; brif end of input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3039 bmi LB7E6 ; brif it's a token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3040 cmpa #': ; colon?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3041 bne LB7E2 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3042 ldb ,x ; get what's after the colon
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3043 cmpb #0x84 ; ELSE?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3044 beq LB7CB ; brif so - suppress the colon
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3045 cmpb #0x83 ; '?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3046 beq LB7CB ; brif so - suppress the colon
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3047 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3048 LB7E0 lda #'! ; placeholder for unknown token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3049 LB7E2 bsr LB814 ; stow output character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3050 bra LB7CB ; go process another input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3051 LB7E6 ldu #COMVEC-10 ; point to command interptation table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3052 cmpa #0xff ; is it a function?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3053 bne LB7F1 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3054 lda ,x+ ; get function token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3055 leau 5,u ; shift to the function half of the interpretation tables
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3056 LB7F1 anda #0x7f ; remove token bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3057 LB7F3 leau 10,u ; move to next command/function table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3058 tst ,u ; is this table active?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3059 beq LB7E0 ; brif not - use place holder
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3060 suba ,u ; subtract number of tokens handled by this table entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3061 bpl LB7F3 ; brif this token isn't handled here
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3062 adda ,u ; undo extra subtraction
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3063 ldu 1,u ; get reserved word list for this table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3064 LB801 deca ; are we at the right entry?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3065 bmi LB80A ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3066 LB804 tst ,u+ ; end of entry?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3067 bpl LB804 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3068 bra LB801 ; see if we're there yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3069 LB80A lda ,u ; get character from wordlist
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3070 bsr LB814 ; put character in the buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3071 tst ,u+ ; end of word?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3072 bpl LB80A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3073 bra LB7CB ; go handle another input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3074 LB814 cmpy #LINBUF+LBUFMX ; is there room?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3075 bhs LB820 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3076 anda #0x7f ; lose bit 7
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3077 sta ,y+ ; save character in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3078 clr ,y ; make sure there's always a NUL terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3079 LB820 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3080 ; Tokenize the line that the input pointer is pointing to; put result in the line input buffer; return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3081 ; length in D
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3082 LB821 jsr RVEC23 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3083 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3084 ldu #LINBUF ; set destination pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3085 LB829 clr V43 ; clear alpha string flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3086 clr V44 ; clear DATA flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3087 LB82D lda ,x+ ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3088 beq LB852 ; brif end of input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3089 tst V43 ; are we handling an alphanumeric string?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3090 beq LB844 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3091 jsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3092 bcc LB852 ; brif alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3093 cmpa #'0 ; is it below the digits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3094 blo LB842 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3095 cmpa #'9 ; is it within the digits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3096 bls LB852 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3097 LB842 clr V43 ; flag that we're past the alphanumeric string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3098 LB844 cmpa #0x20 ; space?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3099 beq LB852 ; brif so - keep it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3100 sta V42 ; save scan delimiter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3101 cmpa #'" ; string delimiter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3102 beq LB886 ; brif so - copy until another "
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3103 tst V44 ; doing "DATA"?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3104 beq LB86B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3105 LB852 sta ,u+ ; put character in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3106 beq LB85C ; brif end of input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3107 cmpa #': ; colon?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3108 beq LB829 ; brif so - reset DATA and alpha string flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3109 LB85A bra LB82D ; go process another input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3110 LB85C clr ,u+ ; put a double NUL at the end
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3111 clr ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3112 tfr u,d ; calculate length of result (includes double NUL and an extra two bytes)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3113 subd #LINHDR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3114 ldx #LINBUF-1 ; point to one before the output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3115 stx CHARAD ; set input pointer there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3116 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3117 LB86B cmpa #'? ; print abbreviation?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3118 bne LB873 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3119 lda #0x87 ; token for PRINT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3120 bra LB852 ; go stash it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3121 LB873 cmpa #'' ; REM abbreviation?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3122 bne LB88A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3123 ldd #0x3a83 ; colon plus ' token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3124 std ,u++ ; put it in the output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3125 LB87C clr V42 ; set delimiter to NUL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3126 LB87E lda ,x+ ; get input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3127 beq LB852 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3128 cmpa V42 ; at the delimiter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3129 beq LB852 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3130 LB886 sta ,u+ ; save in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3131 bra LB87E ; keep scanning for delimiter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3132 LB88A cmpa #'0 ; is it below digits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3133 blo LB892 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3134 cmpa #';+1 ; is it digit, colon, or semicolon?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3135 blo LB852 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3136 LB892 leax -1,x ; move input pointer back one (to point at this input character)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3137 pshs u,x ; save input and output pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3138 clr V41 ; set token type to 0 (command)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3139 ldu #COMVEC-10 ; point to command interpretation table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3140 LB89B clr V42 ; set token counter to 0 (0x80)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3141 LB89D leau 10,u ;
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3142 lda ,u ; get number of reserved words
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3143 beq LB8D4 ; brif this table isn't active
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3144 ldy 1,u ; point to reserved words list
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3145 LB8A6 ldx ,s ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3146 LB8A8 ldb ,y+ ; get character from reserved word table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3147 subb ,x+ ; compare with input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3148 beq LB8A8 ; brif exact match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3149 cmpb #0x80 ; brif it was the last character in word and exact match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3150 bne LB8EA ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3151 leas 2,s ; remove original input pointer from stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3152 puls u ; get back output pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3153 orb V42 ; create token value (B has 0x80 from above)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3154 lda V41 ; get token type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3155 bne LB8C2 ; brif function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3156 cmpb #0x84 ; is it ELSE?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3157 bne LB8C6 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3158 lda #': ; silently add a colon before ELSE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3159 LB8C2 std ,u++ ; put two byte token into output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3160 bra LB85A ; go handle more input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3161 LB8C6 stb ,u+ ; save single byte token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3162 cmpb #0x86 ; DATA?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3163 bne LB8CE ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3164 inc V44 ; set DATA flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3165 LB8CE cmpb #0x82 ; REM?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3166 beq LB87C ; brif so - skip over rest of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3167 LB8D2 bra LB85A ; go handle more input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3168 LB8D4 ldu #COMVEC-5 ; point to interpretation table, function style
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3169 LB8D7 com V41 ; invert token flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3170 bne LB89B ; brif we haven't already done functions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3171 puls x,u ; restore input and output pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3172 lda ,x+ ; copy first character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3173 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3174 jsr LB3A2 ; set C if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3175 bcs LB8D2 ; brif not alpha - it isn't a variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3176 com V43 ; set alphanumeric string flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3177 bra LB8D2 ; process more input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3178 LB8EA inc V42 ; bump token number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3179 deca ; checked all in this table?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3180 beq LB89D ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3181 leay -1,y ; unconsume last compared character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3182 LB8F1 ldb ,y+ ; end of entry?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3183 bpl LB8F1 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3184 bra LB8A6 ; check next reserved word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3185 ; PRINT command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3186 PRINT beq LB958 ; brif no argument - do a newline
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3187 bsr LB8FE ; process print options
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3188 clr DEVNUM ; reset output to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3189 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3190 LB8FE cmpa #'@ ; is it PRINT @?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3191 bne LB907 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3192 jsr LA554 ; move cursor to correct location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3193 bra LB911 ; handle some more
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3194 LB907 cmpa #'# ; device number specified?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3195 bne LB918 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3196 jsr LA5A5 ; parse device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3197 jsr LA406 ; check for valid output file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3198 LB911 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3199 beq LB958 ; brif nothing - do newline
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3200 jsr LB26D ; need comma after @ or #
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3201 LB918 jsr RVEC9 ; do the RAM hook boogaloo
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3202 LB91B beq LB965 ; brif end of input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3203 LB91D cmpa #0xa4 ; TAB(?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3204 beq LB97E ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3205 cmpa #', ; comma (next tab field)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3206 beq LB966 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3207 cmpa #'; ; semicolon (do not advance print position)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3208 beq LB997 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3209 jsr LB156 ; evaluate expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3210 lda VALTYP ; get type of value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3211 pshs a ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3212 bne LB938 ; brif string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3213 jsr LBDD9 ; convert FP number to string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3214 jsr LB516 ; parse a string and put on string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3215 LB938 bsr LB99F ; print string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3216 puls b ; get back variable type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3217 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3218 tst PRTDEV ; is it a display device?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3219 beq LB949 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3220 bsr LB958 ; do a newline
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3221 jsr GETCCH ; get input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3222 bra LB91B ; process more print stuff
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3223 LB949 tstb ; set flags on print position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3224 bne LB954 ; brif not at start of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3225 jsr GETCCH ; get current input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3226 cmpa #', ; comma?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3227 beq LB966 ; skip to next tab field if so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3228 bsr LB9AC ; send a space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3229 LB954 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3230 bne LB91D ; brif not end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3231 LB958 lda #0x0d ; carriage return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3232 bra LB9B1 ; send it to output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3233 LB95C jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3234 LB95F beq LB958 ; brif width is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3235 lda DEVPOS ; get line position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3236 bne LB958 ; brif not at start of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3237 LB965 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3238 LB966 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3239 beq LB975 ; brif line width is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3240 ldb DEVPOS ; get line position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3241 cmpb DEVLCF ; at or past last comma field?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3242 blo LB977 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3243 bsr LB958 ; move to next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3244 bra LB997 ; handle more stuff
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3245 LB975 ldb DEVPOS ; get line position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3246 LB977 subb DEVCFW ; subtract a comma field width
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3247 bhs LB977 ; brif we don't have a remainder yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3248 negb ; now B is number of of spaces needed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3249 bra LB98E ; go advance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3250 LB97E jsr LB709 ; evaluate TAB distance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3251 cmpa #') ; closing )?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3252 lbne LB277 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3253 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3254 subb DEVPOS ; subtract print position from desired position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3255 bls LB997 ; brif we're already past it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3256 LB98E tst PRTDEV ; is it a display device?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3257 bne LB997 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3258 LB992 bsr LB9AC ; output a space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3259 decb ; done enough?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3260 bne LB992 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3261 LB997 jsr GETNCH ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3262 jmp LB91B ; process more items
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3263 ; cpoy string from (X-1) to output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3264 LB99C jsr LB518 ; parse the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3265 LB99F jsr LB657 ; get string details
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3266 LB9A2 incb ; compensate for decb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3267 LB9A3 decb ; done all of the string?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3268 beq LB965 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3269 lda ,x+ ; get character from string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3270 bsr LB9B1 ; send to output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3271 bra LB9A3 ; go do another character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3272 LB9AC lda #0x20 ; space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3273 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3274 LB9AF lda #'? ; question mark character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3275 LB9B1 jmp PUTCHR ; output character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3276 ; The floating point math package and related functions and operations follow from here
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3277 ; to the end of the Color Basic ROM area
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3278 LB9B4 ldx #LBEC0 ; point to FP constant 0.5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3279 bra LB9C2 ; add 0.5 to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3280 LB9B9 jsr LBB2F ; unpack FP data from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3281 ; subtraction operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3282 LB9BC com FP0SGN ; invert sign of FPA0 (subtracting is adding the negative)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3283 com RESSGN ; that also inverts the sign differential
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3284 bra LB9C5 ; go add the negative of FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3285 LB9C2 jsr LBB2F ; unpack FP data from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3286 ; addition operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3287 LB9C5 tstb ; check exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3288 lbeq LBC4A ; copy FPA1 to FPA0 if FPA0 is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3289 ldx #FP1EXP ; point X to FPA1 (first operand) as the operand to denormalize
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3290 LB9CD tfr a,b ; put exponent of FPA1 into B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3291 tstb ; is FPA1 0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3292 beq LBA3E ; brif exponent is 0 - no-op; adding 0 to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3293 subb FP0EXP ; get difference in exponents - number of bits to shift the smaller mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3294 beq LBA3F ; brif exponents are equal - no need to denormalize
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3295 bmi LB9E2 ; brif FPA0 > FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3296 sta FP0EXP ; replace result exponent with FPA1's (FPA1 is bigger)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3297 lda FP1SGN ; also copy sign over
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3298 sta FP0SGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3299 ldx #FP0EXP ; point to FPA0 (we need to denormalize the smaller number)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3300 negb ; invert the difference - this is the number of bits to shift the mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3301 LB9E2 cmpb #-8 ; do we have to shift by a whole byte?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3302 ble LBA3F ; brif so start by shifting whole bytes to the right
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3303 clra ; clear overflow byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3304 lsr 1,x ; shift high bit of mantissa right (LSR will force a zero into the high bit)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3305 jsr LBABA ; shift remainder of mantissa right -B times
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3306 LB9EC ldb RESSGN ; get the sign flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3307 bpl LB9FB ; brif signs are the same (we add the mantissas then)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3308 com 1,x ; complement the mantissa and extra precision bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3309 com 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3310 com 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3311 com 4,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3312 coma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3313 adca #0 ; add one to A (COM sets C); this may cause a carry to enter the ADD below
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3314 LB9FB sta FPSBYT ; save extra precision byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3315 lda FPA0+3 ; add the main mantissa bytes (and propage carry from above)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3316 adca FPA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3317 sta FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3318 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3319 adca FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3320 sta FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3321 lda FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3322 adca FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3323 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3324 lda FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3325 adca FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3326 sta FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3327 tstb ; were signs the same?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3328 bpl LBA5C ; brif so - number may have gotten bigger so normalize if needed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3329 LBA18 bcs LBA1C ; brif we had a carry - result is positive?)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3330 bsr LBA79 ; do a proper negation of FPA0 mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3331 LBA1C clrb ; clear temporary exponent accumulator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3332 LBA1D lda FPA0 ; test high byte of mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3333 bne LBA4F ; brif not 0 - we need to do bit shifting
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3334 lda FPA0+1 ; shift left 8 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3335 sta FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3336 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3337 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3338 lda FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3339 sta FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3340 lda FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3341 sta FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3342 clr FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3343 addb #8 ; account for 8 bits shifted
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3344 cmpb #5*8 ; shifted 5 bytes worth?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3345 blt LBA1D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3346 LBA39 clra ; zero out exponent and sign - result is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3347 LBA3A sta FP0EXP ; set exponent and sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3348 sta FP0SGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3349 LBA3E rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3350 LBA3F bsr LBAAE ; shift FPA0 mantissa to the right
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3351 clrb ; clear carry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3352 bra LB9EC ; get on with adding
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3353 LBA44 incb ; account for one bit shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3354 asl FPSBYT ; shift mantissa and extra precision left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3355 rol FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3356 rol FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3357 rol FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3358 rol FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3359 LBA4F bpl LBA44 ; brif we haven't got a 1 in bit 7
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3360 lda FP0EXP ; get exponent of result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3361 pshs b ; subtract shift count from exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3362 suba ,s+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3363 sta FP0EXP ; save adjusted exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3364 bls LBA39 ; brif we underflowed - set result to 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3365 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3366 LBA5C bcs LBA66 ; brif mantissa overflowed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3367 asl FPSBYT ; get bit 7 of expra precision to C (used for round off)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3368 lda #0 ; set to 0 without affecting C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3369 sta FPSBYT ; clear out extra precision bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3370 bra LBA72 ; go round off result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3371 LBA66 inc FP0EXP ; bump exponent (for a right shift to bring carry in)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3372 beq LBA92 ; brif we overflowed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3373 ror FPA0 ; shift carry into mantissa, shift right
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3374 ror FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3375 ror FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3376 ror FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3377 LBA72 bcc LBA78 ; brif no round-off needed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3378 bsr LBA83 ; add one to mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3379 beq LBA66 ; brif carry - need to shift right again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3380 LBA78 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3381 LBA79 com FP0SGN ; invert sign of value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3382 LBA7B com FPA0 ; first do a one's copmlement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3383 com FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3384 com FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3385 com FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3386 LBA83 ldx FPA0+2 ; add one to mantissa (after one's complement gives two's complement)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3387 leax 1,x ; bump low word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3388 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3389 bne LBA91 ; brif no carry from low word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3390 ldx FPA0 ; bump high word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3391 leax 1,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3392 stx FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3393 LBA91 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3394 LBA92 ldb #2*5 ; code for overflow
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3395 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3396 LBA97 ldx #FPA2-1 ; point to FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3397 LBA9A lda 4,x ; shift mantissa right by 8 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3398 sta FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3399 lda 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3400 sta 4,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3401 lda 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3402 sta 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3403 lda 1,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3404 sta 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3405 lda FPCARY ; and handle extra precision on the left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3406 sta 1,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3407 LBAAE addb #8 ; account for 8 bits shifted
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3408 ble LBA9A ; brif more shifts needed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3409 lda FPSBYT ; get sub byte (extra precision)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3410 subb #8 ; undo the 8 added above
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3411 beq LBAC4 ; brif difference is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3412 LBAB8 asr 1,x ; shift mantissa and sub byte one bit (keep mantissa high bit set)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3413 LBABA ror 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3414 ror 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3415 ror 4,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3416 rora
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3417 incb ; account for one shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3418 bne LBAB8 ; brif not enought shifts yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3419 LBAC4 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3420 LBAC5 fcb 0x81,0x00,0x00,0x00,0x00 ; packed FP 1.0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3421 LBACA bsr LBB2F ; unpack FP value from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3422 ; multiplication operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3423 LBACC beq LBB2E ; brif exponent of FPA0 is 0 (result is 0)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3424 bsr LBB48 ; calculate exponent of product
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3425 LBAD0 lda #0 ; zero out mantissa of FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3426 sta FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3427 sta FPA2+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3428 sta FPA2+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3429 sta FPA2+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3430 ldb FPA0+3 ; multiply FPA1 by LSB of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3431 bsr LBB00
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3432 ldb FPSBYT ; save extra precision byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3433 stb VAE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3434 ldb FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3435 bsr LBB00 ; again for next byte of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3436 ldb FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3437 stb VAD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3438 ldb FPA0+1 ; again for next byte of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3439 bsr LBB00
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3440 ldb FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3441 stb VAC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3442 ldb FPA0 ; and finally for the high byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3443 bsr LBB02
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3444 ldb FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3445 stb VAB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3446 jsr LBC0B ; copy mantissa from FPA2 to FPA0 (result)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3447 jmp LBA1C ; normalize
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3448 LBB00 beq LBA97 ; brif multiplier is 0 - just shift, don't multiply
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3449 LBB02 coma ; set carry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3450 LBB03 lda FPA2 ; get FPA2 MS byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3451 rorb ; data bit to carry; will be 0 when all shifts done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3452 beq LBB2E ; brif 8 shifts done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3453 bcc LBB20 ; brif data bit is 0 - no addition
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3454 lda FPA2+3 ; add mantissa of FPA1 and FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3455 adda FPA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3456 sta FPA2+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3457 lda FPA2+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3458 adca FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3459 sta FPA2+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3460 lda FPA2+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3461 adca FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3462 sta FPA2+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3463 lda FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3464 adca FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3465 LBB20 rora ; shift carry into FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3466 sta FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3467 ror FPA2+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3468 ror FPA2+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3469 ror FPA2+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3470 ror FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3471 clra ; clear carry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3472 bra LBB03
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3473 LBB2E rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3474 ; Unpack FP value from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3475 LBB2F ldd 1,x ; copy mantissa (and sign)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3476 sta FP1SGN ; save sign bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3477 ora #0x80 ; make sure mantissa has bit 7 set
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3478 std FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3479 ldb FP1SGN ; get sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3480 eorb FP0SGN ; set if FPA0 sign differs
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3481 stb RESSGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3482 ldd 3,x ; copy remainder of mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3483 std FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3484 lda ,x ; and exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3485 sta FP1EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3486 ldb FP0EXP ; fetch FPA0 exponent and set flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3487 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3488 ; Calculate eponent for product of FPA0 and FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3489 LBB48 tsta ; is FPA1 zero?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3490 beq LBB61 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3491 adda FP0EXP ; add to exponent of FPA0 (this is how scientific notation works)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3492 rora ; set V if we don't have an overflow
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3493 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3494 bvc LBB61 ; brif exponent too larger or small
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3495 adda #0x80 ; restore the bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3496 sta FP0EXP ; set result exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3497 beq LBB63 ; brif 0 - clear FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3498 lda RESSGN ; the result sign (negative if signs differ) is the result sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3499 sta FP0SGN ; so set it as such
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3500 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3501 LBB5C lda FP0SGN ; get sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3502 coma ; invert sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3503 bra LBB63 ; zero sign and exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3504 LBB61 leas 2,s ; don't go back to caller (mul/div) - return to previous caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3505 LBB63 lbpl LBA39 ; brif we underflowed - go zero things out
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3506 LBB67 jmp LBA92 ; raise overflow error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3507 ; fast multiply by 10 - leave result in FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3508 LBB6A jsr LBC5F ; copy FPA0 to FPA1 (for addition later)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3509 beq LBB7C ; brif exponent is 0 - it's a no-op then
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3510 adda #2 ; this gives "times 4"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3511 bcs LBB67 ; raise overflow if required
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3512 clr RESSGN ; set result sign to "signs the same"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3513 jsr LB9CD ; add FPA1 to FPA0 "times 5"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3514 inc FP0EXP ; times 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3515 beq LBB67 ; brif overflow
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3516 LBB7C rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3517 LBB7D fcb 0x84,0x20,0x00,0x00,0x00 ; packed FP constant 10.0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3518 ; Divide by 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3519 LBB82 jsr LBC5F ; move FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3520 ldx #LBB7D ; point to constant 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3521 clrb ; zero sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3522 LBB89 stb RESSGN ; result will be positive or zero
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3523 jsr LBC14 ; unpack constant 10 to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3524 skip2 ; fall through to division (divide FPA1 by 10)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3525 LBB8F bsr LBB2F ; unpack FP number from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3526 ; division operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3527 LBB91 beq LBC06 ; brif FPA0 is 0 - division by zero
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3528 neg FP0EXP ; get exponent of reciprocal of the divisor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3529 bsr LBB48 ; calculate exponent of quotient
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3530 inc FP0EXP ; bump exponent (due to division algorithm below)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3531 beq LBB67 ; brif overflow
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3532 ldx #FPA2 ; point to temporary storage location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3533 ldb #4 ; do 5 bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3534 stb TMPLOC ; save counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3535 ldb #1 ; shift counter and quotient byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3536 LBBA4 lda FPA0 ; compare mantissa of FPA0 to FPA1, set C if FPA1 less
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3537 cmpa FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3538 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3539 lda FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3540 cmpa FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3541 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3542 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3543 cmpa FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3544 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3545 lda FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3546 cmpa FPA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3547 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3548 coma ; set C if FPA0 = FPA1 (it "goes")
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3549 LBBBD tfr cc,a ; save "it goes" status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3550 rolb ; rotate carry into quotient
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3551 bcc LBBCC ; brif carry clear - haven't done 8 shifts yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3552 stb ,x+ ; save quotient byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3553 dec TMPLOC ; done enough bytes?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3554 bmi LBBFC ; brif done all 5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3555 beq LBBF8 ; brif last byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3556 ldb #1 ; reset shift counter and quotient byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3557 LBBCC tfr a,cc ; get back carry status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3558 bcs LBBDE ; brif it "went"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3559 LBBD0 asl FPA1+3 ; shift mantissa (dividend) left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3560 rol FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3561 rol FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3562 rol FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3563 bcs LBBBD ; brif carry - it "goes" so we have to bump quotient
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3564 bmi LBBA4 ; brif high order bit is set - compare mantissas
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3565 bra LBBBD ; otherwise, count a 0 bit and try next bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3566 LBBDE lda FPA1+3 ; subtract mantissa of FPA0 from mantissa of FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3567 suba FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3568 sta FPA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3569 lda FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3570 sbca FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3571 sta FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3572 lda FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3573 sbca FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3574 sta FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3575 lda FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3576 sbca FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3577 sta FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3578 bra LBBD0 ; go check for another go
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3579 LBBF8 ldb #0x40 ; only two bits in last byte (for rounding)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3580 bra LBBCC ; go do the last byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3581 LBBFC rorb ; get low bits to bits 7,6 and C to bit 5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3582 rorb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3583 rorb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3584 stb FPSBYT ; save result extra precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3585 bsr LBC0B ; move FPA2 mantissa to FPA0 (result)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3586 jmp LBA1C ; go normalize the result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3587 LBC06 ldb #2*10 ; division by zero
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3588 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3589 ; Copy mantissa of FPA2 to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3590 LBC0B ldx FPA2 ; copy high word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3591 stx FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3592 ldx FPA2+2 ; copy low word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3593 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3594 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3595 ; unpack FP number at (X) to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3596 LBC14 pshs a ; save register
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3597 ldd 1,x ; get mantissa high word and sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3598 sta FP0SGN ; set sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3599 ora #0x80 ; make sure mantissa always has bit 7 set
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3600 std FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3601 clr FPSBYT ; clear extra precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3602 ldb ,x ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3603 ldx 3,x ; copy mantissa low word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3604 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3605 stb FP0EXP ; save exponent (and set flags)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3606 puls a,pc ; restore register and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3607 LBC2A ldx #V45 ; point to FPA4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3608 bra LBC35 ; pack FPA0 there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3609 LBC2F ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3610 skip2 ; fall through to pack FPA0 there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3611 LBC33 ldx VARDES ; get variable descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3612 ; Pack FPA0 to (X)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3613 LBC35 lda FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3614 sta ,x ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3615 lda FP0SGN ; get sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3616 ora #0x7f ; force set low bits - only keep sign in high bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3617 anda FPA0 ; merge in bits 6-0 of high byte of mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3618 sta 1,x ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3619 lda FPA0+1 ; copy next highest byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3620 sta 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3621 ldu FPA0+2 ; and the low word of the mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3622 stu 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3623 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3624 ; Copy FPA1 to FPA0; return with sign in A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3625 LBC4A lda FP1SGN ; copy sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3626 LBC4C sta FP0SGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3627 ldx FP1EXP ; copy exponent, mantissa high byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3628 stx FP0EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3629 clr FPSBYT ; clear extra precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3630 lda FPA1+1 ; copy mantissa second highest byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3631 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3632 lda FP0SGN ; set sign for return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3633 ldx FPA1+2 ; copy low word of mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3634 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3635 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3636 ; Copy FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3637 LBC5F ldd FP0EXP ; copy exponent and high byte of mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3638 std FP1EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3639 ldx FPA0+1 ; copy middle bytes of mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3640 stx FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3641 ldx FPA0+3 ; copy low byte of mantissa and sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3642 stx FPA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3643 tsta ; set flags on exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3644 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3645 ; check FPA0: return B = 0, if FPA0 is 0, 0xff if negative, and 0x01 if positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3646 LBC6D ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3647 beq LBC79 ; brif 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3648 LBC71 ldb FP0SGN ; get sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3649 LBC73 rolb ; get sign to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3650 ldb #0xff ; set for negative result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3651 bcs LBC79 ; brif negative
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3652 negb ; set to 1 for positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3653 LBC79 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3654 ; SGN function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3655 SGN bsr LBC6D ; get sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3656 LBC7C stb FPA0 ; save result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3657 clr FPA0+1 ; clear next lower 8 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3658 ldb #0x88 ; exponent if mantissa is 8 bit integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3659 LBC82 lda FPA0 ; get high bits of mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3660 suba #0x80 ; set C if mantissa was positive (will cause a negation if it was negative)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3661 LBC86 stb FP0EXP ; set exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3662 ldd ZERO ; clear out low word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3663 std FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3664 sta FPSBYT ; clear extra precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3665 sta FP0SGN ; set sign to positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3666 jmp LBA18 ; normalize the result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3667 ; ABS function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3668 ABS clr FP0SGN ; force FPA0 to be positive (yes, it's that simple)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3669 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3670 ; Compare packed FP number at (X) to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3671 ; Return with B = -1, 0, 1 for FPA0 <, =, > (X) and flags set based on that
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3672 LBC96 ldb ,x ; get exponent of (X)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3673 beq LBC6D ; brif (X) is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3674 ldb 1,x ; get MS byte of mantissa of (X)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3675 eorb FP0SGN ; set bit 7 if signs of (X) and FPA0 differ
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3676 bmi LBC71 ; brif signs differ - no need to compare the magnitude
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3677 LBCA0 ldb FP0EXP ; compare exponents and brif different
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3678 cmpb ,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3679 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3680 ldb 1,x ; compare mantissa (but we have to pack the FPA0 bits first
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3681 orb #0x7f ; keep only sign bit (note: signs are the same)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3682 andb FPA0 ; merge in the mantissa bits from FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3683 cmpb 1,x ; do the packed versions match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3684 bne LBCC3 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3685 ldb FPA0+1 ; compare second byte of mantissas
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3686 cmpb 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3687 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3688 ldb FPA0+2 ; compare third byte of mantissas
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3689 cmpb 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3690 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3691 ldb FPA0+3 ; compare low byte of mantissas, but use subtraction so B = 0 on match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3692 subb 4,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3693 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3694 rts ; return B = 0 if (X) = FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3695 LBCC3 rorb ; shift carry to bit 7 (C set if FPA0 < (X))
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3696 eorb FP0SGN ; invert the comparision sense if the signs are negative
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3697 bra LBC73 ; interpret comparison result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3698 ; Shift mantissa of FPA0 until the binary point is immediately to the right of the mantissa and set up the
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3699 ; result as a two's complement value.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3700 LBCC8 ldb FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3701 beq LBD09 ; brif FPA0 is zero - we don't have to do anything, just blank it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3702 subb #0xa0 ; calculate number of shifts to get to the correct exponent (binary point to the right)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3703 lda FP0SGN ; do we have a positive number?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3704 bpl LBCD7 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3705 com FPCARY ; negate the mantissa and set extra inbound precision to the correct sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3706 jsr LBA7B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3707 LBCD7 ldx #FP0EXP ; point to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3708 cmpb #-8 ; moving by whole bytes?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3709 bgt LBCE4 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3710 jsr LBAAE ; do bit shifting
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3711 clr FPCARY ; clear carry in byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3712 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3713 LBCE4 clr FPCARY ; clear the extra carry in precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3714 lda FP0SGN ; get sign of value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3715 rola ; get sign to carry (so rotate repeats the sign)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3716 ror FPA0 ; shift the first bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3717 jmp LBABA ; do the shifting dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3718 ; INT function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3719 INT ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3720 cmpb #0xa0 ; is the number big enough that there can be no fractional part?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3721 bhs LBD11 ; brif so - we don't have to do anything
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3722 bsr LBCC8 ; go shift binary point to the right of the mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3723 stb FPSBYT ; save extra precision bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3724 lda FP0SGN ; get original sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3725 stb FP0SGN ; force result to be positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3726 suba #0x80 ; set C if we had a positive result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3727 lda #0xa0 ; set exponent to match denormalized result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3728 sta FP0EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3729 lda FPA0+3 ; save low byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3730 sta CHARAC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3731 jmp LBA18 ; go normalize (this will correct for the two's complement representation of negatives)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3732 LBD09 stb FPA0 ; replace mantissa of FPA0 with contents of B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3733 stb FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3734 stb FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3735 stb FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3736 LBD11 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3737 ; Convert ASCII string to FP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3738 ; BUG: no overflow is checked on the decimal exponent in exponential notation.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3739 LBD12 ldx ZERO ; zero out FPA0 and temporaries
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3740 stx FP0SGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3741 stx FP0EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3742 stx FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3743 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3744 stx V47
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3745 stx V45
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3746 bcs LBD86 ; brif input character is numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3747 jsr RVEC19 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3748 cmpa #'- ; regular negative sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3749 bne LBD2D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3750 com COEFCT ; invert sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3751 bra LBD31 ; process stuff after the sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3752 LBD2D cmpa #'+ ; regular plus?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3753 bne LBD35 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3754 LBD31 jsr GETNCH ; get character after sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3755 bcs LBD86 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3756 LBD35 cmpa #'. ; decimal point?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3757 beq LBD61 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3758 cmpa #'E ; scientific notation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3759 bne LBD65 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3760 jsr GETNCH ; eat the "E"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3761 bcs LBDA5 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3762 cmpa #0xac ; negative sign (token)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3763 beq LBD53 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3764 cmpa #'- ; regular negative?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3765 beq LBD53 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3766 cmpa #0xab ; plus sign (token)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3767 beq LBD55 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3768 cmpa #'+ ; regular plus?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3769 beq LBD55
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3770 bra LBD59 ; brif no sign found
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3771 LBD53 com V48 ; set exponent sign to negative
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3772 LBD55 jsr GETNCH ; eat the sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3773 bcs LBDA5 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3774 LBD59 tst V48 ; is the exponent sign negatvie?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3775 beq LBD65 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3776 neg V47 ; negate base 10 exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3777 bra LBD65
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3778 LBD61 com V46 ; toggle decimal point flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3779 bne LBD31 ; brif we haven't seen two decimal points
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3780 LBD65 lda V47 ; get base 10 exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3781 suba V45 ; subtract number of places to the right
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3782 sta V47 ; we now have a complete decimal exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3783 beq LBD7F ; brif we have no base 10 shifting required
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3784 bpl LBD78 ; brif positive exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3785 LBD6F jsr LBB82 ; divide FPA0 by 10 (shift decimal point left)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3786 inc V47 ; bump exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3787 bne LBD6F ; brif we haven't reached 0 yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3788 bra LBD7F ; return result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3789 LBD78 jsr LBB6A ; multiply by 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3790 dec V47 ; downshift the exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3791 bne LBD78 ; brif not at 0 yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3792 LBD7F lda COEFCT ; get desired sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3793 bpl LBD11 ; brif it will be positive - no need to do anything
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3794 jmp LBEE9 ; flip the sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3795 LBD86 ldb V45 ; get the decimal count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3796 subb V46 ; (if decimal seen, will add one; otherwise it does nothing)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3797 stb V45
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3798 pshs a ; save new digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3799 jsr LBB6A ; multiply partial result by 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3800 puls b ; get back digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3801 subb #'0 ; remove ASCII bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3802 bsr LBD99 ; add B to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3803 bra LBD31 ; go process another digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3804 LBD99 jsr LBC2F ; save FPA0 to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3805 jsr LBC7C ; convert B to FP number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3806 ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3807 jmp LB9C2 ; add FPA3 and FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3808 LBDA5 ldb V47 ; get exponent value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3809 aslb ; times 2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3810 aslb ; times 4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3811 addb V47 ; times 5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3812 aslb ; times 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3813 suba #'0 ; remove ASCII bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3814 pshs b ; save acculated result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3815 adda ,s+ ; add new digit to accumulated result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3816 sta V47 ; save new accumulated decimal exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3817 bra LBD55 ; interpret another exponent character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3818 LBDB6 fcb 0x9b,0x3e,0xbc,0x1f,0xfd ; packed FP: 99999999.9
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3819 LBDBB fcb 0x9e,0x6e,0x6b,0x27,0xfd ; packed FP: 999999999
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3820 LBDC0 fcb 0x9e,0x6e,0x6b,0x28,0x00 ; pakced FP: 1E9
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3821 LBDC5 ldx #LABE8-1 ; point to "IN" message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3822 bsr LBDD6 ; output the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3823 ldd CURLIN ; get basic line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3824 LBDCC std FPA0 ; save 16 bit unsigned integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3825 ldb #0x90 ; exponent for upper 16 bits of FPA0 to be an integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3826 coma ; set C (force normalization to treat as positive)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3827 jsr LBC86 ; zero bottom half, save exponent, and normalize
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3828 bsr LBDD9 ; convert FP number to ASCII string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3829 LBDD6 jmp LB99C ; output string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3830 ; Convert FP number to ASCII string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3831 LBDD9 ldu #STRBUF+3 ; point to buffer address that will not cause string to go to string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3832 LBDDC lda #0x20 ; default sign is a space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3833 ldb FP0SGN ; get sign of value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3834 bpl LBDE4 ; brif positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3835 lda #'- ; use negative sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3836 LBDE4 sta ,u+ ; save sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3837 stu COEFPT ; save output buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3838 sta FP0SGN ; save sign character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3839 lda #'0 ; result is 0 if exponent is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3840 ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3841 lbeq LBEB8 ; brif FPA0 is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3842 clra ; base 10 exponent is 0 for > 1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3843 cmpb #0x80 ; is number > 1?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3844 bhi LBDFF ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3845 ldx #LBDC0 ; point to 1E+09
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3846 jsr LBACA ; shift decimal to the right by 9 spaces
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3847 lda #-9 ; account for shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3848 LBDFF sta V45 ; save base 10 exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3849 LBE01 ldx #LBDBB ; point to 999999999
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3850 jsr LBCA0 ; are we above that?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3851 bgt LBE18 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3852 LBE09 ldx #LBDB6 ; point to 99999999.9
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3853 jsr LBCA0 ; are we above that?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3854 bgt LBE1F ; brif in range
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3855 jsr LBB6A ; multiply by 10 (we were small)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3856 dec V45 ; account for shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3857 bra LBE09 ; see if we've come into range
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3858 LBE18 jsr LBB82 ; divide by 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3859 inc V45 ; account for shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3860 bra LBE01 ; see if we've come into range
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3861 LBE1F jsr LB9B4 ; add 0.5 to FPA0 (rounding)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3862 jsr LBCC8 ; do the integer dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3863 ldb #1 ; default decimal flag (force immediate decimal)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3864 lda V45 ; get base 10 exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3865 adda #10 ; account for "unormalized" number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3866 bmi LBE36 ; brif number < 1.0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3867 cmpa #11 ; do we have more than 9 places?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3868 bhs LBE36 ; brif so - do scientific notation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3869 deca
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3870 tfr a,b
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3871 lda #2 ; force no scientific notation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3872 LBE36 deca ; subtract wo without affecting carry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3873 deca
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3874 sta V47 ; save exponent - 0 is do not display in scientific notation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3875 stb V45 ; save number of places to left of decimal
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3876 bgt LBE4B ; brif >= 1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3877 ldu COEFPT ; point to string buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3878 lda #'. ; put decimal
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3879 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3880 tstb ; is there anything to left of decimal?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3881 beq LBE4B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3882 lda #'0 ; store a zero
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3883 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3884 LBE4B ldx #LBEC5 ; point to powers of 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3885 ldb #0x80 ; set digit counter to 0x80
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3886 LBE50 lda FPA0+3 ; add mantissa to power of 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3887 adda 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3888 sta FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3889 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3890 adca 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3891 sta FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3892 lda FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3893 adca 1,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3894 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3895 lda FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3896 adca ,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3897 sta FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3898 incb ; add one to digit counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3899 rorb ; put carry into bit 7
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3900 rolb ; set V if carry and sign differ
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3901 bvc LBE50 ; brif positive mantissa or carry is 0 and negative mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3902 bcc LBE72 ; brif negative mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3903 subb #10+1 ; take 9's complement if adding mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3904 negb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3905 LBE72 addb #'0-1 ; add ASCII bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3906 leax 4,x ; move to next power of 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3907 tfr b,a ; save digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3908 anda #0x7f ; remove add/subtract flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3909 sta ,u+ ; put in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3910 dec V45 ; do we need a decimal yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3911 bne LBE84 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3912 lda #'. ; put decimal
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3913 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3914 LBE84 comb ; toggle bit 7 (add/sub flag)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3915 andb #0x80 ; only keep bit 7
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3916 cmpx #LBEC5+9*4 ; done all places?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3917 bne LBE50 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3918 LBE8C lda ,-u ; get last character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3919 cmpa #'0 ; was it 0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3920 beq LBE8C ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3921 cmpa #'. ; decimal?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3922 bne LBE98 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3923 leau -1,u ; move past decimal if it isn't needed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3924 LBE98 lda #'+ ; plus sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3925 ldb V47 ; get scientific notation exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3926 beq LBEBA ; brif not scientific notation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3927 bpl LBEA3 ; brif positive exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3928 lda #'- ; negative sign for base 10 exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3929 negb ; switch to positive exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3930 LBEA3 sta 2,u ; put sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3931 lda #'E ; put "E"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3932 sta 1,u
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3933 lda #'0-1 ; init to ASCII 0 (compensate for INC)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3934 LBEAB inca ; bump digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3935 subb #10 ; have we hit the correct one yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3936 bcc LBEAB ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3937 addb #'9+1 ; convert units digit to ASCII
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3938 std 3,u ; put exponent in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3939 clr 5,u ; put trailing NUL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3940 bra LBEBC ; go reset pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3941 LBEB8 sta ,u ; store last character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3942 LBEBA clr 1,u ; put NUL at the end
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3943 LBEBC ldx #STRBUF+3 ; point to start of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3944 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3945 LBEC0 fcb 0x80,0x00,0x00,0x00,0x00 ; packed FP 0.5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3946 LBEC5 fqb -100000000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3947 fqb 10000000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3948 fqb -1000000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3949 fqb 100000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3950 fqb -10000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3951 fqb 1000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3952 fqb -100
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3953 fqb 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3954 fqb -1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3955 LBEE9 lda FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3956 beq LBEEF ; brif 0 - don't flip sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3957 com FP0SGN ; flip sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3958 LBEEF rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3959 ; Expand a polynomial of the form
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3960 ; AQ+BQ^3+CQ^5+DQ^7..... where Q is FPA0 and X points to a table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3961 LBEF0 stx COEFPT ; save coefficient table pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3962 jsr LBC2F ; copy FPA0 to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3963 bsr LBEFC ; multiply FPA3 by FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3964 bsr LBF01 ; expand polynomial
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3965 ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3966 LBEFC jmp LBACA ; multiply FPA0 by FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3967 LBEFF stx COEFPT ; save coefficient table counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3968 LBF01 jsr LBC2A ; move FPA0 to FPA4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3969 ldx COEFPT ; get the current coefficient
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3970 ldb ,x+ ; get the number of entries
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3971 stb COEFCT ; save as counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3972 stx COEFPT ; save new pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3973 LBF0C bsr LBEFC ; multiply (X) and FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3974 ldx COEFPT ; get this coefficient
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3975 leax 5,x ; move to next one
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3976 stx COEFPT ; save new pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3977 jsr LB9C2 ; add (X) to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3978 ldx #V45 ; point X to FPA4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3979 dec COEFCT ; done all coefficients?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3980 bne LBF0C ; brif more left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3981 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3982 ; RND function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3983 RND jsr LBC6D ; set flags on FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3984 bmi LBF45 ; brif negative - set seed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3985 beq LBF3B ; brif 0 - do random between 0 and 1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3986 bsr LBF38 ; convert to integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3987 jsr LBC2F ; save range value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3988 bsr LBF3B ; get random number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3989 ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3990 bsr LBEFC ; multply (X) by FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3991 ldx #LBAC5 ; point to FP 1.0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3992 jsr LB9C2 ; add 1 to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3993 LBF38 jmp INT ; return integer value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3994 LBF3B ldx RVSEED+1 ; move variable random number seed to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3995 stx FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3996 ldx RVSEED+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3997 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3998 LBF45 ldx RSEED ; move fixed seed to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3999 stx FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4000 ldx RSEED+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4001 stx FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4002 jsr LBAD0 ; multiply them
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4003 ldd VAD ; get lowest order product bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4004 addd #0x658b ; add a constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4005 std RVSEED+3 ; save it as new seed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4006 std FPA0+2 ; save in result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4007 ldd VAB ; get high order extra product bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4008 adcb #0xb0 ; add upper bytes of constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4009 adca #5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4010 std RVSEED+1 ; save as new seed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4011 std FPA0 ; save as result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4012 clr FP0SGN ; set result to positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4013 lda #0x80 ; set exponent to 0 < FPA0 < 1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4014 sta FP0EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4015 lda FPA2+2 ; get a byte from FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4016 sta FPSBYT ; save as extra precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4017 jmp LBA1C ; go normalize FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4018 RSEED fqb 0x40e64dab ; constant random number generator seed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4019 ; SIN function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4020 SIN jsr LBC5F ; copy FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4021 ldx #LBFBD ; point to 2*pi
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4022 ldb FP1SGN ; get sign of FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4023 jsr LBB89 ; divide FPA0 by 2*pi
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4024 jsr LBC5F ; copy FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4025 bsr LBF38 ; convert FPA0 to an integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4026 clr RESSGN ; set result to positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4027 lda FP1EXP ; get exponent of FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4028 ldb FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4029 jsr LB9BC ; subtract FPA0 from FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4030 ldx #LBFC2 ; point to FP 0.25
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4031 jsr LB9B9 ; subtract FPA0 from 0.25 (pi/2)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4032 lda FP0SGN ; get result sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4033 pshs a ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4034 bpl LBFA6 ; brif positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4035 jsr LB9B4 ; add 0.5 (pi) to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4036 lda FP0SGN ; get sign of result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4037 bmi LBFA9 ; brif negative
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4038 com RELFLG ; if 3pi/2 >= arg >= pi/2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4039 LBFA6 jsr LBEE9 ; flip sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4040 LBFA9 ldx #LBFC2 ; point to 0.25
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4041 jsr LB9C2 ; add 0.25 (pi/2) to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4042 puls a ; get original sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4043 tsta ; was it positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4044 bpl LBFB7 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4045 jsr LBEE9 ; flip result sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4046 LBFB7 ldx #LBFC7 ; point to series coefficients
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4047 jmp LBEF0 ; go calculate value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4048 LBFBD fcb 0x83,0x49,0x0f,0xda,0xa2 ; 2*pi
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4049 LBFC2 fcb 0x7f,0x00,0x00,0x00,0x00 ; 0.25
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4050 ; modified taylor series SIN coefficients
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4051 LBFC7 fcb 6-1 ; six coefficients
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4052 fcb 0x84,0xe6,0x1a,0x2d,0x1b ; -((2pi)^11)/11!
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4053 fcb 0x86,0x28,0x07,0xfb,0xf8 ; ((2pi)^9)/9!
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4054 fcb 0x87,0x99,0x68,0x89,0x01 ; -((2pi)^7)/7!
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4055 fcb 0x87,0x23,0x35,0xdf,0xe1 ; ((2pi)^5)/5!
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4056 fcb 0x86,0xa5,0x5d,0xe7,0x28 ; -(2pi)^3)/3!
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4057 fcb 0x83,0x49,0x0f,0xda,0xa2 ; 2*pi
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4058 ; these 12 bytes are unused
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4059 fcb 0xa1,0x54,0x46,0x8f,0x13,0x8f,0x52,0x43
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4060 fcb 0x89,0xcd,0xa6,0x81
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4061 ; these are the hardware interrupt vectors (coco1/2 only)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4062 fdb SW3VEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4063 fdb SW2VEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4064 fdb FRQVEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4065 fdb IRQVEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4066 fdb SWIVEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4067 fdb NMIVEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4068 fdb RESVEC

Mercurial > hg > index.cgi

annotate bas11.s @ 1:704b2c9dc19e default tip