Coco Roms: bas10.s annotate

annotate bas10.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 ldu #LA00E ; 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 clrb ; use page 0 as direct page
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	33 tfr b,dp
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	34 ldx #PIA0 ; point to PIA0 (keyboard)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	35 clr 1,x ; enable direction register for PIA0 DA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	36 clr 3,x ; enable direction register for PIA0 DB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	37 clr ,x ; set PIA0 DA to input (keyboard rows, comparator)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	38 ldd #0xff34
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	39 sta 2,x ; set PIA0 DB to output (keyboard columns)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	40 stb 1,x ; set PIA0 DA to data mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	41 stb 3,x ; set PIA0 DB to data mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	42 ldx #PIA1 ; point to misc PIA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	43 clr 1,x ; enable direction register for PIA1 DA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	44 clr 3,x ; enable direction register for PIA1 DB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	45 deca
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	46 sta ,x ; set PIA1 DA as output except for bit 0 (DAC, printer, cassette input)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	47 lda #0xf8 ; set VDG control to output, other bits input (printer handshake, etc.)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	48 sta 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	49 stb 1,x ; enable data mode for PIA1 DA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	50 stb 3,x ; enable data mode for PIA1 DB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	51 clr 2,x ; set VDG to alphanumeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	52 lda #2 ; set rs232 to marking
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	53 sta ,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	54 lda 2,x ; get RAM jumper setting
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	55 ldx #SAMREG ; point to SAM control register
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	56 ldb #16 ; 16 bits to clear
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	57 LA05E sta ,x++ ; clear a SAM bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	58 decb ; done all 16?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	59 bne LA05E ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	60 sta SAMREG+9 ; put display at 0x400
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	61 anda #4 ; keep only RAMSZ input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	62 beq LA06C ; brif 4K RAM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	63 sta -5,x ; set for 16K
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	64 LA06C jmp ,u ; go do warm/cold start
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	65 BACDST ldx #0 ; point to start of memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	66 LA071 clr ,x+ ; clear byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	67 cmpx #VIDRAM ; at display?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	68 bne LA071 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	69 jsr LA928 ; clear screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	70 ldx #LA10D ; point to variabl einitializers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	71 ldu #CMPMID ; point to destination
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	72 ldb #28
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	73 jsr LA59A ; copy initializers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	74 ldu #IRQVEC ; point to second destination
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	75 ldb #30
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	76 jsr LA59A ; copy initializers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	77 ldx #LB277 ; init extended basic's COMVEC stuff to error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	78 stx 3,u
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	79 stx 8,u
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	80 ldx #RVEC0 ; point to ram vectors
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	81 lda #$39 ; RTS opcode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	82 LA094 sta ,x+ ; init a byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	83 cmpx #RVEC0+25*3 ; end of vectors?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	84 bne LA094 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	85 sta LINHDR-1 ; set "next line address" in line input buffer to nonzero
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	86 ldx #VIDRAM+$200 ; point to end of display screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	87 clr ,x+ ; put a constant zero before start of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	88 stx TXTTAB ; set start ofprogram
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	89 LA0AB lda 2,x ; look for end of memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	90 coma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	91 sta 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	92 cmpa 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	93 bne LA0BA ; brif it wasn't RAM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	94 leax 1,x ; move pointer forward
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	95 LA0B6 com 1,x ; restore memory value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	96 bra LA0AB ; check another byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	97 LA0BA stx TOPRAM ; set top of memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	98 stx MEMSIZ ; set top of string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	99 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	100 leax -200,x ; allocate 200 bytes for string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	101 stx FRETOP ; save top of free memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	102 tfr x,s ; put the stack there too
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	103 jsr LAD19 ; do a "NEW"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	104 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	105 cmpx EXBAS ; is there an ECB ROM?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	106 lbeq EXBAS+2 ; brif so - launch it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	107 andcc #0xaf ; start interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	108 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	109 jsr LB99C ; print it out
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	110 ldx #BAWMST ; warm start routine address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	111 stx RSTVEC ; set vector there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	112 lda #0x55 ; warm start valid flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	113 sta RSTFLG ; mark warm start valid
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	114 bra LA0F3 ; go to direct mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	115 ; Warm start entry point
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	116 BAWMST nop ; valid routine marker
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	117 clr DEVNUM ; reset output/input to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	118 jsr LAD33 ; do a partial NEW
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	119 andcc #0xaf ; start interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	120 jsr LA928 ; clear the screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	121 LA0F3 jmp LAC73 ; go to direct mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	122 ; 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	123 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	124 bmi LA0FC ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	125 rti
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	126 LA0FC jsr LA7D1 ; delay for a while
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	127 jsr LA7D1 ; delay for another while
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	128 ldu #LA108 ; point to cartridge starter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	129 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	130 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	131 jmp ROMPAK ; transfer control to the cartridge
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	132 ; Variable initializers (first batch)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	133 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	134 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	135 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	136 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	137 fcb 11 ; cursor blink delay
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	138 fdb 87 ; 600 baud delay constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	139 fdb 1 ; printer carriage return delay constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	140 fcb 16 ; printer tab field width
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	141 fcb 112 ; last printer tab zone
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	142 fcb 132 ; printer carriage width
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	143 fcb 0 ; printer carriage position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	144 fdb LB44A ; default execution address for EXEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	145 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	146 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	147 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	148 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	149 jmp BROMHK
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	150 ; Variable initializers (second batch)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	151 jmp BIRQSV ; IRQ handler
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	152 jmp BFRQSV ; FIRQ handler
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	153 jmp LB44A ; default USR() address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	154 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	155 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	156 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	157 jmp LB277 ; exponentiation handler vector
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	158 fcb 53 ; (command interpretation table) 53 commands
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	159 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	160 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	161 fcb 20 ; (command interpretation table) 20 functions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	162 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	163 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	164 ; This is the signon message.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	165 LA147 fcc 'COLOR BASIC 1.0'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	166 fcb 0x0d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	167 fcc '(C) 1980 TANDY'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	168 fcb 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	169 ; 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	170 LA166 fcc 'MICROSOFT'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	171 fcb 0x0d,0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	172 ; 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	173 LA171 bsr LA176 ; get character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	174 anda #0x7f ; mask off high bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	175 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	176 ; 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	177 ; 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	178 ; 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	179 LA176 jsr RVEC4 ; do RAM hook
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	180 clr CINBFL ; flag data available
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	181 tst DEVNUM ; is it keyboard?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	182 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	183 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	184 bne LA186 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	185 com CINBFL ; flag EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	186 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	187 ; Read character from cassette file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	188 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	189 ldx CINPTR ; get input buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	190 lda ,x+ ; get character from buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	191 pshs a ; save it for return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	192 stx CINPTR ; save new input buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	193 dec CINCTR ; count character just consumed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	194 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	195 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	196 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	197 ; 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	198 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	199 bne LA1AB ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	200 ldb #11 ; reset blink timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	201 stb BLKCNT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	202 ldx CURPOS ; get cursor position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	203 lda ,x ; get character at the cursor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	204 adda #0x10 ; move to next color
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	205 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	206 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	207 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	208 LA1AE jmp LA7D3 ; go count X down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	209 ; 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	210 LA1B1 pshs x,b ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	211 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	212 bsr KEYIN ; go read a key
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	213 beq LA1B3 ; brif no key pressed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	214 ldb #0x60 ; VDG screen space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	215 stb [CURPOS] ; blank cursor out
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	216 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	217 ; This is the actual keyboard polling routine. Returns 0 if no new key is down. This version of the
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	218 ; routine has a few issues which are finally fixed mostly properly in Color Basic 1.2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	219 KEYIN pshs x,b ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	220 bsr LA1C8 ; get keystroke
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	221 tsta ; set flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	222 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	223 LA1C8 leas -3,s ; make temp storage space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	224 ldx #KEYBUF ; point to keyboard state table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	225 clr 0,s ; reset column counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	226 ldb #0xfe ; set column strobe to first column
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	227 stb PIA0+2 ; set strobe
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	228 LA1D4 bsr LA238 ; read keyboard data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	229 sta 1,s ; save keyboard data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	230 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	231 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	232 ldb 1,s ; get new key data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	233 stb ,x+ ; save in state table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	234 tsta ; was a key down?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	235 bne LA1ED ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	236 inc 0,s ; bump column counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	237 comb ; set C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	238 rol PIA0+2 ; move column strobe over
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	239 bcs LA1D4 ; brif not done all columns
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	240 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	241 LA1ED ldb PIA0+2 ; get strobe data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	242 stb 2,s ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	243 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	244 LA1F4 addb #8 ; move to next row base
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	245 lsra ; at the right row base?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	246 bcc LA1F4 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	247 addb 0,s ; add in column offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	248 beq LA245 ; brif @
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	249 cmpb #26 ; alpha?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	250 bhi LA247 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	251 orb #0x40 ; add in uppercase ASCII bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	252 bsr LA22D ; get shift status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	253 beq LA20E ; brif shift down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	254 lda CASFLG ; check casplock
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	255 bne LA20E ; brif not caps mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	256 orb #0x20 ; convert to lower case
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	257 LA20E stb 0,s ; save ASCII value for return later
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	258 ldx DEBVAL ; get debounce delay
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	259 jsr LA7D3 ; count X down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	260 ldb 2,s ; get column strobe data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	261 stb PIA0+2 ; re-set strobe
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	262 bsr LA238 ; read row data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	263 cmpa 1,s ; does it match the result from before the delay?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	264 puls a ; get back key code (return value)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	265 bne LA22A ; brif not the same result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	266 cmpa #0x12 ; is it SHIFT-0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	267 bne LA22B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	268 com CASFLG ; flip capslock state
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	269 LA22A clra ; set Z, return 0 for no key down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	270 LA22B puls x,pc ; clean up stack and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	271 LA22D lda #0x7f ; column strobe for SHIFT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	272 sta PIA0+2 ; strobe keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	273 lda PIA0 ; get row data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	274 anda #0x40 ; keep only shift data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	275 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	276 LA238 lda PIA0 ; read row data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	277 ora #0x80 ; mask comparator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	278 tst PIA0+2 ; reading column 7?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	279 bmi LA244 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	280 ora #0xc0 ; mask off SHIFT as well
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	281 LA244 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	282 LA245 ldb #51 ; code for @
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	283 LA247 ldx #CONTAB-0x36 ; point to control code table, first batch
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	284 cmpb #33 ; arrows, space, zero?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	285 blo LA264 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	286 ldx #CONTAB-0x54 ; point to control code table, second batch
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	287 cmpb #48 ; enter, clear, break, @?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	288 bhs LA264 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	289 bsr LA22D ; get shift state
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	290 cmpb #43 ; number, colon, semicolon?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	291 bls LA25D ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	292 eora #0x40 ; invert shift state
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	293 LA25D tsta ; test shift status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	294 beq LA20E ; brif shift down - we have a result so debounce things
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	295 addb #0x10 ; add in ASCII offset correction
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	296 bra LA20E ; go debounce things
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	297 LA264 aslb ; two bytes per entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	298 bsr LA22D ; test shift state
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	299 bne LA26A ; brif not shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	300 incb ; select shifted entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	301 LA26A ldb b,x ; get return value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	302 bra LA20E ; go debounce keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	303 CONTAB fcb 0x5e,0x5f ; <UP> (^, _)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	304 fcb 0x0a,0x5b ; <DOWN> (LF, [)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	305 fcb 0x08,0x15 ; <LEFT> (BS, ^U)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	306 fcb 0x09,0x5d ; <RIGHT> (TAB, ])
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	307 fcb 0x20,0x20 ; <SPACE>
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	308 fcb 0x30,0x12 ; <0> (0, ^R)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	309 fcb 0x0d,0x0d ; <ENTER> (CR, CR)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	310 fcb 0x0c,0x5c ; <CLEAR> (FF, \)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	311 fcb 0x03,0x03 ; <BREAK> (^C, ^C)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	312 fcb 0x40,0x13 ; <@> (@, ^S)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	313 ; Generic output routine.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	314 ; 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	315 ; 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	316 PUTCHR jsr RVEC3 ; call RAM hook
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	317 pshs b ; save B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	318 ldb DEVNUM ; get desired device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	319 incb ; set flags (Z for -1, etc.)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	320 puls b ; restore B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	321 bmi LA2BF ; brif < -1 (line printer)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	322 bne LA30A ; brif > -1 (screen)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	323 ; Write character to tape file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	324 pshs x,b,a ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	325 ldb FILSTA ; get file status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	326 decb ; input file?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	327 beq LA2A6 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	328 ldb CINCTR ; get character count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	329 incb ; account for this character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	330 bne LA29E ; brif buffer not full
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	331 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	332 LA29E ldx CINPTR ; get output buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	333 sta ,x+ ; put character in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	334 stx CINPTR ; save new buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	335 inc CINCTR ; account for this character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	336 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	337 ; Write a block of data to tape.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	338 LA2A8 ldb #1 ; data block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	339 LA2AA stb BLKTYP ; set block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	340 ldx #CASBUF ; point to output buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	341 stx CBUFAD ; set buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	342 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	343 stb BLKLEN ; set length to write
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	344 pshs u,y,a ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	345 jsr LA7E5 ; write a block to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	346 puls a,y,u ; restore registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	347 jmp LA650 ; reset buffer pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	348 ; This routine is changed to send 8 bits of data as of Color Basic 1.1.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	349 ; Color Basic 1.2 adds a handshake ; before sending any data.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	350 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	351 orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	352 bsr LA2FB ; set to marking (stop bit)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	353 asla ; send 7 data bits, one start bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	354 ldb #8 ; 8 bits to send
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	355 LA2C8 pshs b ; save bit counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	356 clrb ; initialize output byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	357 lsra ; get output bit to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	358 rolb ; now move it to the right bit in the output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	359 rolb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	360 stb PIA1 ; send bit to printer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	361 bsr LA302 ; do the baud delay (this delay is improved in later versions)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	362 nop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	363 nop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	364 nop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	365 bsr LA302
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	366 puls b ; get bit counter back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	367 decb ; sent all 8 bits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	368 bne LA2C8 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	369 bsr LA2FB ; send stop bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	370 puls cc,a ; restore output character and interrupt status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	371 cmpa #0x0d ; carriage return?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	372 beq LA2ED ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	373 inc LPTPOS ; bump output position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	374 ldb LPTPOS ; get new position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	375 cmpb LPTWID ; at end of line?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	376 blo LA2F3 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	377 LA2ED clr LPTPOS ; reset output position to start of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	378 bsr LA305 ; do carriage return delay
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	379 bsr LA305
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	380 LA2F3 ldb PIA1+2 ; read rs232 status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	381 lsrb ; get status bit to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	382 bcs LA2F3 ; brif still not ready
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	383 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	384 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	385 LA2FD stb PIA1 ; set RS232 output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	386 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	387 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	388 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	389 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	390 jmp LA7D3 ; count X down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	391 ; Output character to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	392 LA30A pshs x,b,a ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	393 ldx CURPOS ; get cursor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	394 cmpa #0x08 ; backspace?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	395 bne LA31D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	396 cmpx #VIDRAM ; at top of screen?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	397 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	398 lda #0x60 ; VDG space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	399 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	400 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	401 LA31D cmpa #0x0d ; carriage return?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	402 bne LA32F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	403 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	404 LA323 lda #0x60 ; VDG space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	405 sta ,x+ ; put output space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	406 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	407 bitb #0x1f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	408 bne LA323 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	409 bra LA344 ; go check for scrolling
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	410 LA32F cmpa #0x20 ; control character?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	411 blo LA35D ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	412 tsta ; is it graphics block?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	413 bmi LA342 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	414 cmpa #0x40 ; number or special?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	415 blo LA340 ; brif so (flip "case" bit)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	416 cmpa #0x60 ; upper case alpha?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	417 blo LA342 ; brif so - keep it unmodified
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	418 anda #0xdf ; clear bit 5 (inverse video)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	419 LA340 eora #0x40 ; flip inverse video bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	420 LA342 sta ,x+ ; output character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	421 LA344 stx CURPOS ; save new cursor position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	422 cmpx #VIDRAM+511 ; end of screen?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	423 bls LA35D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	424 ldx #VIDRAM ; point to start of screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	425 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	426 std ,x++ ; put them on this row
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	427 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	428 blo LA34E ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	429 ldb #0x60 ; VDG space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	430 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	431 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	432 ; Set up device parameters for output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	433 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	434 pshs x,b,a ; save registers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	435 clr PRTDEV ; flag device as a screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	436 lda DEVNUM ; get devicenumber
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	437 beq LA373 ; brif screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	438 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	439 beq LA384 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	440 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	441 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	442 bra LA37C ; set parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	443 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	444 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	445 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	446 lda #32 ; screen is 32 characters wide
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	447 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	448 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	449 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	450 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	451 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	452 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	453 clra ; line width is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	454 clrb ; character position on line is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	455 bra LA37C ; go set parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	456 ; 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	457 ; 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	458 ; 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	459 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	460 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	461 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	462 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	463 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	464 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	465 tst CINBFL ; is it EOF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	466 bne LA3CC ; brif EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	467 tst DEVNUM ; is it keyboard input?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	468 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	469 cmpa #0x0c ; form feed (CLEAR)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	470 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	471 cmpa #0x08 ; backspace?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	472 bne LA3B4 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	473 decb ; move back one character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	474 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	475 leax -1,x ; move input pointer back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	476 bra LA3E8 ; echo the backspace and continue
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	477 LA3B4 cmpa #0x15 ; SHIFT-LEFT (kill line)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	478 bne LA3C2 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	479 LA3B8 decb ; at start of line?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	480 beq LA390 ; brif so - reset and restart
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	481 lda #0x08 ; echo a backspace
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	482 jsr PUTCHR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	483 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	484 LA3C2 cmpa #0x03 ; BREAK?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	485 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	486 beq LA3CD ; brif BREAK - exit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	487 LA3C8 cmpa #0x0d ; ENTER (CR)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	488 bne LA3D9 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	489 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	490 LA3CD pshs cc ; save ENTER/BREAK flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	491 jsr LB958 ; echo a carriage return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	492 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	493 ldx #LINBUF ; point to input buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	494 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	495 LA3D9 cmpa #0x20 ; control character?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	496 blo LA39A ; brif so - skip it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	497 cmpa #'z+1 ; above z?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	498 bhs LA39A ; brif so - ignore it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	499 cmpb #LBUFMX ; is the buffer full?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	500 bhs LA39A ; brif so - ignore extra characters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	501 sta ,x+ ; put character in the buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	502 incb ; bump character count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	503 LA3E8 jsr PUTCHR ; echo character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	504 bra LA39A ; go handle next input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	505 ; 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	506 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	507 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	508 beq LA415 ; brif keyboard - always valid
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	509 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	510 bne LA403 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	511 lda FILSTA ; get tape file status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	512 bne LA400 ; brif file is open
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	513 LA3FB ldb #22*2 ; raise NO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	514 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	515 LA400 deca ; is it in input mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	516 beq LA415 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	517 LA403 jmp LA616 ; raise FM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	518 ; 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	519 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	520 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	521 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	522 bne LA415 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	523 lda FILSTA ; get file status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	524 beq LA3FB ; brif not open
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	525 deca ; is it open for reading?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	526 beq LA403 ; brif so - bad mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	527 LA415 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	528 ; CLOSE command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	529 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	530 jsr LA5A5 ; parse device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	531 LA41B bsr LA42D ; close specified file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	532 jsr GETCCH ; is there more?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	533 beq LA44B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	534 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	535 bra LA41B ; go close this one
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	536 ; Close all files handler.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	537 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	538 lda #-1 ; start with tape file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	539 sta DEVNUM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	540 ; 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	541 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	542 lda DEVNUM ; get device we're closing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	543 clr DEVNUM ; reset to screen/keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	544 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	545 bne LA44B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	546 lda FILSTA ; get file status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	547 cmpa #2 ; is it output?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	548 bne LA449 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	549 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	550 beq LA449 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	551 jsr LA2A8 ; write final block of data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	552 LA444 ldb #0xff ; write EOF block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	553 jsr LA2AA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	554 LA449 clr FILSTA ; mark tape file closed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	555 LA44B rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	556 ; CSAVE command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	557 CSAVE jsr LA578 ; parse filename
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	558 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	559 beq LA469 ; brif none
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	560 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	561 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	562 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	563 bne LA44B ; brif not end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	564 clra ; file type 0 (basic program)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	565 jsr LA65C ; write out header block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	566 lda #-1 ; set output to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	567 sta DEVNUM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	568 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	569 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	570 LA469 clra ; file type 0 (basic program)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	571 ldx ZERO ; set to binary file mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	572 jsr LA65F ; write header block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	573 clr FILSTA ; close files
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	574 inc BLKTYP ; set block type to data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	575 jsr WRLDR ; write out a leader
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	576 ldx TXTTAB ; point to start of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	577 LA478 stx CBUFAD ; set buffer location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	578 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	579 sta BLKLEN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	580 ldd VARTAB ; get end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	581 subd CBUFAD ; how much is left?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	582 beq LA491 ; brif we have nothing left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	583 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	584 bhs LA48C ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	585 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	586 LA48C jsr SNDBLK ; write a block out
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	587 bra LA478 ; go do another block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	588 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	589 clr BLKLEN ; no data in EOF block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	590 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	591 ; CLOAD and CLOADM commands
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	592 CLOAD clr FILSTA ; close tape file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	593 cmpa #'M ; is it ClOADM?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	594 beq LA4FE ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	595 leas 2,s ; clean up stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	596 jsr LA5C5 ; parse file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	597 jsr LA648 ; go find the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	598 tst CASBUF+10 ; is it binary?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	599 beq LA4C8 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	600 lda CASBUF+9 ; is it ASCII?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	601 beq LA4CD ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	602 jsr LAD19 ; clear out existing program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	603 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	604 sta DEVNUM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	605 inc FILSTA ; set tape file to input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	606 jsr LA635 ; go read first block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	607 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	608 ; 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	609 ; 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	610 ; 8K.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	611 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	612 jsr LA42D ; close file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	613 jmp LAC73 ; go back to immediate mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	614 LA4C8 lda CASBUF+8 ; get file type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	615 beq LA4D0 ; brif basic program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	616 LA4CD jmp LA616 ; raise FM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	617 LA4D0 jsr LAD19 ; erase existing program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	618 jsr CASON ; start reading tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	619 ldx TXTTAB ; get start of program storage
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	620 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	621 ldd CBUFAD ; get start of block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	622 inca ; bump by 256
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	623 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	624 jsr GETBLK ; go read a block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	625 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	626 lda BLKTYP ; get type of block read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	627 beq LA4F8 ; brif header block - IO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	628 bpl LA4D8 ; brif data block - read another
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	629 stx VARTAB ; save new end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	630 bsr LA53B ; stop tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	631 ldx #LABED-1 ; point to "OK" prompt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	632 jsr LB99C ; show prompt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	633 jmp LACE9 ; reset various things and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	634 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	635 LA4FB jmp LA619 ; raise IO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	636 ; This is the CLOADM command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	637 LA4FE jsr GETNCH ; eat the "M"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	638 bsr LA578 ; parse file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	639 jsr LA648 ; go find the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	640 LA505 ldx ZERO ; default offset is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	641 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	642 beq LA511 ; brif no offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	643 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	644 jsr LB73D ; evaluate offset to X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	645 LA511 lda CASBUF+8 ; get file mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	646 cmpa #2 ; M/L program?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	647 bne LA4CD ; brif not - FM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	648 ldd CASBUF+11 ; get load address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	649 leau D,x ; add in offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	650 stu EXECJP ; set EXEC default address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	651 tst CASBUF+10 ; is it binary?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	652 bne LA4CD ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	653 ldd CASBUF+13 ; get load address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	654 leax d,x ; add in offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	655 stx CBUFAD ; set buffer address for loading
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	656 jsr CASON ; start up tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	657 LA52E jsr GETBLK ; read a block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	658 bne LA4FB ; brif error reading
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	659 stx CBUFAD ; save new load address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	660 tst BLKTYP ; set flags on block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	661 beq LA4FB ; brif another header - IO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	662 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	663 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	664 ; The EXEC command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	665 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	666 jsr LB73D ; evaluate EXEC address to X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	667 stx EXECJP ; set new default EXEC address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	668 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	669 ; 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	670 ; check logic or packaged up with LIST?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	671 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	672 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	673 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	674 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	675 jmp LADEB ; do the actual break check
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	676 ; 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	677 ; 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	678 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	679 subd #511 ; is it within bounds?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	680 lbhi LB44A ; brif not - error out
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	681 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	682 std CURPOS ; set cursor position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	683 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	684 ; INKEY$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	685 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	686 bne LA56B ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	687 jsr KEYIN ; poll the keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	688 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	689 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	690 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	691 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	692 jmp LB69B ; return the NULL string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	693 ; Parse a filename
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	694 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	695 clr ,x+ ; zero out file name length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	696 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	697 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	698 cmpx #CASBUF ; at end of file name?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	699 bne LA57F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	700 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	701 beq LA5A1 ; brif no name present
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	702 jsr LB156 ; evaluate the file name expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	703 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	704 ldu #CFNBUF ; point to file name buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	705 stb ,u+ ; save string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	706 beq LA5A1 ; brif empty - we're done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	707 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	708 LA598 ldb #8 ; copy 8 bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	709 ; Move B bytes from (X) to (U)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	710 LA59A lda ,x+ ; copy a byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	711 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	712 decb ; done yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	713 bne LA59A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	714 LA5A1 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	715 ; Parse a device number and check validity
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	716 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	717 LA5A5 cmpa #'# ; do we have a #?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	718 bne LA5AB ; brif not (it's optional)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	719 jsr GETNCH ; munch the #
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	720 LA5AB jsr LB141 ; evaluate the expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	721 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	722 rolb ; move sign of B into C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	723 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	724 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	725 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	726 stb DEVNUM ; set device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	727 jsr RVEC1 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	728 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	729 bpl LA61F ; brif not negative (not valid)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	730 cmpb #-2 ; is it printer or tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	731 blt LA61F ; brif not (not valid)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	732 LA5C4 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	733 ; 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	734 LA5C5 bsr LA578 ; parse file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	735 jsr GETCCH ; set flags on current character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	736 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	737 jmp LB277 ; raise SN error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	738 ; EOF functoin
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	739 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	740 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	741 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	742 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	743 jsr LA3ED ; check validity for reading
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	744 LA5DA clrb ; not EOF = 0 (FALSE)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	745 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	746 beq LA5E4 ; brif keyboard - never EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	747 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	748 bne LA5E4 ; brif so - not EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	749 comb ; set EOF flag to -1 (true)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	750 LA5E4 puls a ; get back original device
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	751 sta DEVNUM ; restore it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	752 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	753 jmp GIVABF ; go return the result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	754 ; SKIPF command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	755 SKIPF bsr LA5C5 ; parse file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	756 bsr LA648 ; look for the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	757 jsr LA6D1 ; read the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	758 bne LA619 ; brif error reading file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	759 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	760 ; OPEN command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	761 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	762 jsr LB156 ; get file status (input/output)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	763 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	764 pshs b ; save status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	765 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	766 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	767 bsr LA5C5 ; parse the file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	768 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	769 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	770 puls b ; get back status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	771 cmpb #'I ; INPUT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	772 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	773 cmpb #'O ; OUTPUT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	774 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	775 LA616 ldb #21*2 ; raise FM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	776 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	777 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	778 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	779 LA61C ldb #18*2 ; raise AO 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 LA61F ldb #19*2 ; raise DN error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	782 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	783 LA624 inca ; are we opening the tape?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	784 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	785 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	786 bsr LA648 ; read header block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	787 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	788 anda CASBUF+10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	789 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	790 inc FILSTA ; open file for input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	791 LA635 jsr LA701 ; start tape, read block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	792 bne LA619 ; brif error during read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	793 tst BLKTYP ; check block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	794 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	795 bmi LA657 ; brif EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	796 lda BLKLEN ; get length of block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	797 beq LA635 ; brif empty block - read another
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	798 LA644 sta CINCTR ; set buffer count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	799 bra LA652 ; reset buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	800 LA648 tst FILSTA ; is the file open?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	801 bne LA61C ; brif so - AO error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	802 bsr LA681 ; search for file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	803 bne LA619 ; brif error on read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	804 LA650 clr CINCTR ; mark buffer empty
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	805 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	806 stx CINPTR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	807 LA657 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	808 LA658 inca ; check for tape device
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	809 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	810 inca ; make file type 1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	811 LA65C ldx #0xffff ; ASCII and data mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	812 LA65F tst FILSTA ; is file open?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	813 bne LA61C ; brif so - raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	814 ldu #CASBUF ; point to tape buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	815 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	816 sta 8,u ; set file type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	817 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	818 ldx #CFNBUF+1 ; point to file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	819 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	820 clr BLKTYP ; set for header block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	821 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	822 sta BLKLEN ; set block length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	823 jsr LA7E5 ; write the block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	824 lda #2 ; set file type to output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	825 sta FILSTA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	826 bra LA650 ; reset file pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	827 ; Search for correct cassette file name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	828 LA681 ldx #CASBUF ; point to cassette buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	829 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	830 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	831 inca
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	832 bne LA696 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	833 jsr LA928 ; clear screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	834 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	835 ldb #'S ; for "searching"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	836 stb ,x++ ; put it on the screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	837 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	838 LA696 bsr LA701 ; read a block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	839 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	840 bne LA6D0 ; brif error or not header
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	841 ldx #CASBUF ; point to block just read
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	842 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	843 ldb #8 ; compare 8 characters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	844 clr ,-s ; set flag to "match"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	845 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	846 ldy CURLIN ; immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	847 leay 1,y
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	848 bne LA6B4 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	849 clr DEVNUM ; set output to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	850 jsr PUTCHR ; display character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	851 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	852 ora ,s ; merge with match flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	853 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	854 decb ; done all characters?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	855 bne LA6A6 ; brif not - do another
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	856 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	857 beq LA6CB ; brif we have a match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	858 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	859 beq LA6CB ; brif any file will do
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	860 bsr LA6D1 ; go read past the file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	861 bne LA6D0 ; return on error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	862 bra LA686 ; keep looking
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	863 LA6CB lda #'F ; for "found"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	864 bsr LA6F8 ; put "F" on screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	865 clra ; set Z to indicat eno errors
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	866 LA6D0 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	867 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	868 bne LA6DF ; brif "blocked" file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	869 jsr CASON ; turn on tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	870 LA6D9 bsr GETBLK ; read a block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	871 bsr LA6E5 ; error or EOF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	872 bra LA6D9 ; read another block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	873 LA6DF bsr LA701 ; read a single block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	874 bsr LA6E5 ; error or EOF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	875 bra LA6DF ; read another block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	876 LA6E5 bne LA6ED ; got error reading block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	877 lda BLKTYP ; check block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	878 nega ; A is 0 now if EOF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	879 bmi LA6F3 ; brif not end of file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	880 deca ; clear error indicator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	881 LA6ED sta CSRERR ; set error flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	882 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	883 bra LA705 ; turn off motor and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	884 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	885 eora #0x40 ; flip case
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	886 LA6F8 ldb CURLIN ; immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	887 incb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	888 bne LA700 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	889 sta VIDRAM ; save flipped case character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	890 LA700 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	891 ; 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	892 LA701 bsr CASON ; start tape going
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	893 bsr GETBLK ; read block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	894 LA705 jsr LA7E9 ; stop tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	895 ldb CSRERR ; get error status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	896 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	897 ; 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	898 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	899 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	900 ldx CBUFAD ; point to destination buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	901 clra ; reset read byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	902 LA712 bsr LA755 ; read a bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	903 rora ; move bit into accumulator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	904 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	905 bne LA712 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	906 bsr LA749 ; read block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	907 sta BLKTYP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	908 bsr LA749 ; get block size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	909 sta BLKLEN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	910 adda BLKTYP ; accumulate checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	911 sta CCKSUM ; save current checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	912 lda BLKLEN ; get back count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	913 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	914 beq LA73B ; brif empty block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	915 LA72B bsr LA749 ; read a byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	916 sta ,x ; save in buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	917 cmpa ,x+ ; make sure it wrote
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	918 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	919 adda CCKSUM ; accumulate checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	920 sta CCKSUM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	921 dec CSRERR ; read all bytes?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	922 bne LA72B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	923 LA73B bsr LA749 ; read checksum from tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	924 suba CCKSUM ; does it match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	925 beq LA746 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	926 lda #1 ; checksum error flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	927 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	928 LA744 lda #2 ; non-RAM error flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	929 LA746 sta CSRERR ; save error status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	930 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	931 LA749 lda #8 ; read 8 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	932 sta CPULWD ; initialize counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	933 LA74D bsr LA755 ; read a bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	934 rora ; put it into accumulator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	935 dec CPULWD ; got all 8 bits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	936 bne LA74D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	937 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	938 LA755 bsr LA75D ; get time between transitions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	939 ldb CPERTM ; get timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	940 decb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	941 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	942 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	943 LA75D clr CPERTM ; reset timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	944 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	945 bne LA773 ; brif HI-LO synch
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	946 LA763 bsr LA76C ; read input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	947 bcs LA763 ; brif still high
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	948 LA767 bsr LA76C ; read input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	949 bcc LA767 ; brif still low
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	950 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	951 LA76C inc CPERTM ; bump timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	952 ldb PIA1 ; get input bit to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	953 rorb
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 LA773 bsr LA76C ; read input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	956 bcc LA773 ; brif still low
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	957 LA777 bsr LA76C ; read output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	958 bcs LA777 ; brif still high
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	959 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	960 ; Start tape and look for sync bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	961 CASON orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	962 bsr LA7CA ; turn on tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	963 clr CPULWD ; reset timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	964 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	965 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	966 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	967 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	968 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	969 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	970 lda CPULWD ; get counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	971 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	972 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	973 sta CBTPHA ; save phase we synched on
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	974 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	975 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	976 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	977 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	978 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	979 inc CPULWD ; bump counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	980 lda CPULWD ; get counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	981 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	982 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	983 LA7A7 clr CPERTM ; reset period timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	984 bsr LA767 ; wait for high
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	985 bra LA7B1 ; set flags on result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	986 LA7AD clr CPERTM ; reset period timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	987 bsr LA777 ; wait for low
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	988 LA7B1 ldb CPERTM ; get period count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	989 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	990 bhi LA7BA ; brif so - reset counts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	991 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	992 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	993 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	994 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	995 ; MOTOR command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	996 MOTOR tfr a,b ; save ON/OFF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	997 jsr GETNCH ; eat the ON/OFF token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	998 cmpb #0xaa ; OFF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	999 beq LA7E9 ; brif so - turn off tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1000 cmpb #0x88 ; ON?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1001 jsr LA5C9 ; SN error if no match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1002 ; Turn on tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1003 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	1004 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	1005 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	1006 LA7D1 ldx ZERO ; maximum delay timer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1007 LA7D3 leax -1,x ; count down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1008 bne LA7D3 ; brif not at 0 yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1009 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1010 ; Write a synch leader to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1011 WRLDR orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1012 bsr LA7CA ; turn on tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1013 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	1014 LA7DE bsr LA828 ; write a 0x55
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1015 leax -1,x ; done?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1016 bne LA7DE ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1017 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1018 ; 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	1019 LA7E5 bsr WRLDR ; write sync
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1020 LA7E7 bsr SNDBLK ; write block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1021 ; Turn off tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1022 LA7E9 andcc #0xaf ; enable interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1023 lda PIA1+1 ; get control register
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1024 anda #0xf7 ; disable motor bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1025 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	1026 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1027 ; Write a block to tape.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1028 SNDBLK orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1029 ldb BLKLEN ; get block size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1030 stb CSRERR ; initialize character counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1031 lda BLKLEN ; initialize checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1032 beq LA805 ; brif empty block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1033 ldx CBUFAD ; point to tape buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1034 LA800 adda ,x+ ; accumulate checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1035 decb ; end of block data?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1036 bne LA800 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1037 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	1038 sta CCKSUM ; save calculated checksum
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1039 ldx CBUFAD ; point to buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1040 bsr LA828 ; send a 0x55
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1041 lda #0x3c ; and then a 0x3c
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1042 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1043 lda BLKTYP ; send block type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1044 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1045 lda BLKLEN ; send block size
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 tsta ; empty block?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1048 beq LA824 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1049 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	1050 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1051 dec CSRERR ; are we done yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1052 bne LA81C ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1053 LA824 lda CCKSUM ; send checksum
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 LA828 lda #0x55 ; send a 0x55
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1056 LA82A pshs a ; save output byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1057 ldb #1 ; initialize bit probe
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1058 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	1059 sta PIA1 ; set DA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1060 ldy #LA85C ; point to sine wave table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1061 bitb ,s ; is bit set?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1062 bne LA848 ; brif so - do high frequency
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1063 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	1064 cmpy #LA85C+36 ; end of table?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1065 beq LA855 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1066 sta PIA1 ; set output sample
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1067 bra LA83B ; do another sample
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1068 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	1069 cmpy #LA85C+36 ; end of table?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1070 beq LA855 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1071 sta PIA1 ; send output sample
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1072 bra LA848 ; do another sample
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1073 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	1074 lslb ; shift mask to next bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1075 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	1076 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	1077 ; 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	1078 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	1079 fcb 0xea,0xf2,0xfa,0xfa,0xfa,0xf2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1080 fcb 0xea,0xda,0xca,0xba,0xaa,0x92
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1081 fcb 0x7a,0x6a,0x52,0x42,0x32,0x22
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1082 fcb 0x12,0x0a,0x02,0x02,0x02,0x0a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1083 fcb 0x12,0x22,0x32,0x42,0x52,0x6a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1084 ; SET command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1085 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	1086 pshs x ; save character location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1087 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	1088 puls x ; get back character pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1089 cmpb #8 ; valid colour?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1090 bhi LA8D5 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1091 decb ; normalize colours
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1092 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	1093 lda #0x10 ; 16 patterns per colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1094 mul
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1095 bra LA89D ; go save the colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1096 LA895 ldb ,x ; get current value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1097 bpl LA89C ; brif not grahpic
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1098 andb #0x70 ; keep only the colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1099 skip1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1100 LA89C clrb ; reset block to all black
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1101 LA89D pshs b ; save colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1102 bsr LA90D ; force a )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1103 lda ,x ; get current screen value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1104 bmi LA8A6 ; brif graphic block already
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1105 clra ; force all pixels off
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1106 LA8A6 anda #0x0f ; keep only pixel data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1107 ora GRBLOK ; set the desired pixel
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1108 ora ,s+ ; merge with desired colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1109 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	1110 sta ,x ; put new block on screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1111 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1112 ; RESET command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1113 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	1114 bsr LA90D ; force a )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1115 clra ; zero block (no pixels)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1116 ldb ,x ; is it graphics?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1117 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	1118 com GRBLOK ; invert pixel data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1119 andb GRBLOK ; turn off the desired pixel
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1120 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	1121 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1122 ; 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	1123 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	1124 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	1125 jsr LB70B ; get first coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1126 cmpb #63 ; valid horizontal coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1127 bhi LA8D5 ; brif out of range
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1128 pshs b ; save horizontal coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1129 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	1130 cmpb #31 ; in range for vertical?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1131 LA8D5 bhi LA948 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1132 pshs b ; save vertical coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1133 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	1134 lda #32 ; 32 bytes per row
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1135 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	1136 ldx #VIDRAM ; point to start of screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1137 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	1138 ldb 1,s ; get horizontal coordinate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1139 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	1140 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	1141 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	1142 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	1143 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	1144 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	1145 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	1146 LA8EE lsrb ; move mask right
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1147 deca ; at the right pixel?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1148 bpl LA8EE ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1149 stb GRBLOK ; save graphics block mask
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1150 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1151 ; POINT function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1152 POINT bsr LA8C4 ; evaluate coordinates
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1153 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	1154 lda ,x ; get character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1155 bpl LA90A ; brif not graphics
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1156 anda GRBLOK ; is desired pixel set?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1157 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	1158 ldb ,x ; get graphics data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1159 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	1160 lsrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1161 lsrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1162 lsrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1163 andb #7 ; lose the graphics block bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1164 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	1165 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	1166 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	1167 ; CLS command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1168 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	1169 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	1170 jsr LB70B ; evaluate colour number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1171 cmpb #8 ; valid colour?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1172 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	1173 tstb ; color 0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1174 beq LA925 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1175 decb ; normalize to 0 based colour numbers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1176 lda #0x10 ; 16 blocks per colour
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1177 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	1178 orb #0x0f ; set all pixels
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1179 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	1180 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1181 LA928 ldb #0x60 ; VDG screen space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1182 ldx #VIDRAM ; point to start of screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1183 LA92D stx CURPOS ; set cursor position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1184 LA92F stb ,x+ ; blank a character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1185 cmpx #VIDRAM+511 ; end of screen?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1186 bls LA92F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1187 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1188 LA937 bsr LA928 ; clear te screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1189 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	1190 jmp LB99C ; go display it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1191 ; 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	1192 LA93F jsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1193 LA942 jsr LB70B ; evaluate expression to B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1194 tstb ; is it 0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1195 bne LA984 ; brif not - return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1196 LA948 jmp LB44A ; raise FC error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1197 ; SOUND command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1198 SOUND bsr LA942 ; evaluate frequency
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1199 stb SNDTON ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1200 bsr LA93F ; evaluate duration (after a comma)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1201 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	1202 mul
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1203 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	1204 lda PIA0+3 ; enable 60 Hz interrupt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1205 ora #1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1206 sta PIA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1207 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	1208 bsr LA9A2 ; connect DAC to MUX output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1209 bsr LA976 ; turn on sound
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1210 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	1211 lda #0xfe ; store high value and delay
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1212 bsr LA987
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1213 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	1214 lda #2 ; store low value and delay
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1215 bsr LA987
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1216 ldx SNDDUR ; has timer expired?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1217 bne LA964 ; brif not, do another wave
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1218 ; Disable sound output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1219 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	1220 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1221 ; Enable sound output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1222 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	1223 sta ,-s ; save desired value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1224 lda PIA1+3 ; get control register value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1225 anda #0xf7 ; reset value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1226 ora ,s+ ; set to desired value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1227 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	1228 LA984 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1229 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	1230 LA987 sta PIA1 ; set DAC output value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1231 lda SNDTON ; get frequency
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1232 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	1233 bne LA98C ; brif not done yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1234 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1235 ; AUDIO command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1236 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	1237 jsr GETNCH ; munch the ON/OFF token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1238 cmpb #0xaa ; OFF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1239 beq LA974 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1240 subb #0x88 ; ON?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1241 jsr LA5C9 ; do SN error if not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1242 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	1243 bsr LA9A2 ; set MUX input to tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1244 bra LA976 ; enable sound
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1245 ; Set MUX source to value in B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1246 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	1247 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	1248 LA9A7 lda ,u ; get control register value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1249 anda #0xf7 ; reset mux control bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1250 asrb ; shift desired value to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1251 bcc LA9B0 ; brif this bit is clear
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1252 ora #8 ; set the bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1253 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	1254 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1255 ; IRQ service routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1256 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	1257 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	1258 lda PIA0+2 ; clear VSYNC interrupt status
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1259 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	1260 beq LA9C5 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1261 leax -1,x ; count down one tick
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1262 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	1263 LA9C5 rti
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1264 ; JOYSTK function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1265 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	1266 cmpb #3 ; valid axis?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1267 lbhi LB44A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1268 tstb ; want axis 0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1269 bne LA9D4 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1270 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	1271 LA9D4 ldx #POTVAL ; point to axis values
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1272 ldb FPA0+3 ; get desired axis
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1273 ldb b,x ; get axis value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1274 jmp LB4F3 ; return value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1275 ; 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	1276 ; 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	1277 ; 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	1278 ; 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	1279 ; 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	1280 GETJOY bsr LA974 ; turn off sound
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1281 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	1282 ldb #3 ; start with axis 3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1283 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	1284 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	1285 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	1286 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	1287 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	1288 orb #2 ; keep rs232 output marking
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1289 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	1290 eorb #2 ; remove RS232 output value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1291 lda PIA0 ; read the comparator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1292 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	1293 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	1294 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1295 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	1296 lda ,s+ ; get bit value back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1297 lsra ; cut in half
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1298 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	1299 bne LA9EE ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1300 lsrb ; normalize the axis value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1301 lsrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1302 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	1303 beq LAA12 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1304 dec ,s ; are we out of retries?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1305 bne LA9EB ; brif not - try again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1306 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	1307 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	1308 decb ; move to next axis
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1309 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	1310 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1311 ; 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	1312 BROMHK cmpa #'9+1 ; is it >= colon?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1313 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	1314 cmpa #0x20 ; space?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1315 bne LAA24 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1316 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	1317 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	1318 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	1319 LAA28 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1320 ; Jump table for functions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1321 LAA29 fdb SGN ; SGN 0x80
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1322 fdb INT ; INT 0x81
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1323 fdb ABS ; ABS 0x82
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1324 fdb USRJMP ; USR 0x83
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1325 fdb RND ; RND 0x84
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1326 fdb SIN ; SIN 0x85
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1327 fdb PEEK ; PEEK 0x86
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1328 fdb LEN ; LEN 0x87
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1329 fdb STR ; STR$ 0x88
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1330 fdb VAL ; VAL 0x89
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1331 fdb ASC ; ASC 0x8a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1332 fdb CHR ; CHR$ 0x8b
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1333 fdb EOF ; EOF 0x8c
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1334 fdb JOYSTK ; JOYSTK 0x8d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1335 fdb LEFT ; LEFT$ 0x8e
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1336 fdb RIGHT ; RIGHT$ 0x8f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1337 fdb MID ; MID$ 0x90
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1338 fdb POINT ; POINT 0x91
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1339 fdb INKEY ; INKEY$ 0x92
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1340 fdb MEM ; MEM 0x93
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1341 ; 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	1342 LAA51 fcb 0x79 ; +
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1343 fdb LB9C5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1344 fcb 0x79 ; -
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1345 fdb LB9BC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1346 fcb 0x7b ; *
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1347 fdb LBACC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1348 fcb 0x7b ; /
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1349 fdb LBB91
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1350 fcb 0x7f ; ^ (exponentiation)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1351 fdb EXPJMP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1352 fcb 0x50 ; AND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1353 fdb LB2D5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1354 fcb 0x46 ; OR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1355 fdb LB2D4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1356 ; Reserved words table for commands
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1357 LAA66 fcs 'FOR' ; 0x80
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1358 fcs 'GO' ; 0x81
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1359 fcs 'REM' ; 0x82
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1360 fcs "'" ; 0x83
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1361 fcs 'ELSE' ; 0x84
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1362 fcs 'IF' ; 0x85
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1363 fcs 'DATA' ; 0x86
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1364 fcs 'PRINT' ; 0x87
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1365 fcs 'ON' ; 0x88
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1366 fcs 'INPUT' ; 0x89
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1367 fcs 'END' ; 0x8a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1368 fcs 'NEXT' ; 0x8b
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1369 fcs 'DIM' ; 0x8c
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1370 fcs 'READ' ; 0x8d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1371 fcs 'RUN' ; 0x8e
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1372 fcs 'RESTORE' ; 0x8f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1373 fcs 'RETURN' ; 0x90
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1374 fcs 'STOP' ; 0x91
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1375 fcs 'POKE' ; 0x92
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1376 fcs 'CONT' ; 0x93
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1377 fcs 'LIST' ; 0x94
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1378 fcs 'CLEAR' ; 0x95
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1379 fcs 'NEW' ; 0x96
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1380 fcs 'CLOAD' ; 0x97
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1381 fcs 'CSAVE' ; 0x98
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1382 fcs 'OPEN' ; 0x99
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1383 fcs 'CLOSE' ; 0x9a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1384 fcs 'LLIST' ; 0x9b
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1385 fcs 'SET' ; 0x9c
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1386 fcs 'RESET' ; 0x9d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1387 fcs 'CLS' ; 0x9e
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1388 fcs 'MOTOR' ; 0x9f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1389 fcs 'SOUND' ; 0xa0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1390 fcs 'AUDIO' ; 0xa1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1391 fcs 'EXEC' ; 0xa2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1392 fcs 'SKIPF' ; 0xa3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1393 fcs 'TAB(' ; 0xa4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1394 fcs 'TO' ; 0xa5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1395 fcs 'SUB' ; 0xa6
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1396 fcs 'THEN' ; 0xa7
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1397 fcs 'NOT' ; 0xa8
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1398 fcs 'STEP' ; 0xa9
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1399 fcs 'OFF' ; 0xaa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1400 fcs '+' ; 0xab
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1401 fcs '-' ; 0xac
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1402 fcs '*' ; 0xad
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1403 fcs '/' ; 0xae
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1404 fcs '^' ; 0xaf
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1405 fcs 'AND' ; 0xb0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1406 fcs 'OR' ; 0xb1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1407 fcs '>' ; 0xb2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1408 fcs '=' ; 0xb3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1409 fcs '<' ; 0xb4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1410 ; Reserved word list for functions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1411 LAB1A fcs 'SGN' ; 0x80
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1412 fcs 'INT' ; 0x81
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1413 fcs 'ABS' ; 0x82
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1414 fcs 'USR' ; 0x83
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1415 fcs 'RND' ; 0x84
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1416 fcs 'SIN' ; 0x85
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1417 fcs 'PEEK' ; 0x86
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1418 fcs 'LEN' ; 0x87
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1419 fcs 'STR$' ; 0x88
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1420 fcs 'VAL' ; 0x89
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1421 fcs 'ASC' ; 0x8a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1422 fcs 'CHR$' ; 0x8b
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1423 fcs 'EOF' ; 0x8c
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1424 fcs 'JOYSTK' ; 0x8d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1425 fcs 'LEFT$' ; 0x8e
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1426 fcs 'RIGHT$' ; 0x8f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1427 fcs 'MID$' ; 0x90
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1428 fcs 'POINT' ; 0x91
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1429 fcs 'INKEY$' ; 0x92
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1430 fcs 'MEM' ; 0x93
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1431 ; Jump table for commands
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1432 LAB67 fdb FOR ; 0x80 FOR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1433 fdb GO ; 0x81 GO
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1434 fdb REM ; 0x82 REM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1435 fdb REM ; 0x83 '
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1436 fdb REM ; 0x84 ELSE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1437 fdb IFTOK ; 0x85 IF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1438 fdb DATA ; 0x86 DATA
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1439 fdb PRINT ; 0x87 PRINT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1440 fdb ON ; 0x88 ON
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1441 fdb INPUT ; 0x89 INPUT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1442 fdb ENDTOK ; 0x8a END
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1443 fdb NEXT ; 0x8b NEXT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1444 fdb DIM ; 0x8c DIM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1445 fdb READ ; 0x8d READ
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1446 fdb RUN ; 0x8e RUN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1447 fdb RESTOR ; 0x8f RESTORE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1448 fdb RETURN ; 0x90 RETURN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1449 fdb STOP ; 0x91 STOP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1450 fdb POKE ; 0x92 POKE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1451 fdb CONT ; 0x93 CONT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1452 fdb LIST ; 0x94 LIST
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1453 fdb CLEAR ; 0x95 CLEAR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1454 fdb NEW ; 0x96 NEW
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1455 fdb CLOAD ; 0x97 CLOAD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1456 fdb CSAVE ; 0x98 CSAVE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1457 fdb OPEN ; 0x99 OPEN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1458 fdb CLOSE ; 0x9a CLOSE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1459 fdb LLIST ; 0x9b LLIST
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1460 fdb SET ; 0x9c SET
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1461 fdb RESET ; 0x9d RESET
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1462 fdb CLS ; 0x9e CLS
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1463 fdb MOTOR ; 0x9f MOTOR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1464 fdb SOUND ; 0xa0 SOUND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1465 fdb AUDIO ; 0xa1 AUDIO
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1466 fdb EXEC ; 0xa2 EXEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1467 fdb SKIPF ; 0xa3 SKIPF
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1468 ; Error message table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1469 LABAF fcc 'NF' ; 0 NEXT without FOR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1470 fcc 'SN' ; 1 Syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1471 fcc 'RG' ; 2 RETURN without GOSUB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1472 fcc 'OD' ; 3 Out of data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1473 fcc 'FC' ; 4 Illegal function call
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1474 fcc 'OV' ; 5 Overflow
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1475 fcc 'OM' ; 6 Out of memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1476 fcc 'UL' ; 7 Undefined line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1477 fcc 'BS' ; 8 Bad subscript
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1478 fcc 'DD' ; 9 Redimensioned array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1479 fcc '/0' ; 10 Division by 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1480 fcc 'ID' ; 11 Illegal direct statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1481 fcc 'TM' ; 12 Type mismatch
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1482 fcc 'OS' ; 13 Out of string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1483 fcc 'LS' ; 14 String too long
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1484 fcc 'ST' ; 15 String formula too complex
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1485 fcc 'CN' ; 16 Can't continue
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1486 fcc 'FD' ; 17 Bad file data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1487 fcc 'AO' ; 18 File already open
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1488 fcc 'DN' ; 19 Device number error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1489 fcc 'IO' ; 20 Input/output error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1490 fcc 'FM' ; 21 Bad file mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1491 fcc 'NO' ; 22 File not open
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1492 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	1493 fcc 'DS' ; 24 Direct statement in file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1494 LABE1 fcn ' ERROR'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1495 LABE8 fcn ' IN '
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1496 LABED fcb 0x0d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1497 LABEE fcc 'OK'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1498 fcb 0x0d,0x00
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1499 LABF2 fcb 0x0d
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1500 fcn 'BREAK'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1501 ; 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	1502 ; 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	1503 ; for the first match.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1504 ;
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1505 ; 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	1506 ; 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	1507 ; 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	1508 ; every loop?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1509 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	1510 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	1511 stx TEMPTR ; save current search pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1512 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	1513 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	1514 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	1515 ldx 1,x ; get index variable descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1516 stx TMPTR1 ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1517 ldx VARDES ; get desired index descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1518 beq LAC16 ; brif NULL - we found something
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1519 cmpx TMPTR1 ; does this one match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1520 beq LAC1A ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1521 ldx TEMPTR ; get back frame pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1522 abx ; move to next entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1523 bra LABFB ; check next block of data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1524 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	1525 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	1526 LAC1A ldx TEMPTR ; get matching frame pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1527 tsta ; set Z if FOR/NEXT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1528 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1529 ; 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	1530 ; 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	1531 ; 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	1532 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	1533 LAC20 ldu V41 ; point to destination
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1534 leau 1,u ; offset for pre-dec
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1535 ldx V43 ; point to source
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1536 leax 1,x ; offset for pre-dec
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1537 LAC28 lda ,-x ; get source byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1538 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	1539 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	1540 bne LAC28 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1541 stu V45 ; save final destination address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1542 LAC32 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1543 ; 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	1544 LAC33 clra ; zero extend
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1545 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	1546 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	1547 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	1548 bcs LAC44 ; brif >65535!
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1549 sts BOTSTK ; get current stack pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1550 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	1551 blo LAC32 ; brif not - no error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1552 LAC44 ldb #6*2 ; raise OM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1553 ; The error servicing routine
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1554 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	1555 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	1556 jsr LA7E9 ; turn off tape
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1557 jsr LA974 ; disable sound
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1558 jsr LAD33 ; reset stack, etc.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1559 clr DEVNUM ; reset output to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1560 jsr LB95C ; do a newline
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1561 jsr LB9AF ; send a ?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1562 ldx #LABAF ; point to error table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1563 abx ; offset to correct message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1564 bsr LACA0 ; send a char from X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1565 bsr LACA0 ; send another char from X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1566 ldx #LABE1-1 ; point to "ERROR" message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1567 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	1568 lda CURLIN ; are we in immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1569 inca
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1570 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	1571 jsr LBDC5 ; print "IN ****"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1572 ; This is the immediate mode loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1573 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	1574 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	1575 jsr LB99C ; show prompt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1576 LAC7C jsr LA390 ; read an input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1577 ldu #0xffff ; flag immediate mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1578 stu CURLIN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1579 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	1580 tst CINBFL ; EOF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1581 lbne LA4BF ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1582 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	1583 jsr GETNCH ; get character from input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1584 beq LAC7C ; brif no input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1585 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	1586 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	1587 tst DEVNUM ; keyboard input?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1588 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	1589 jsr LB821 ; go tokenize the input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1590 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	1591 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	1592 jmp LB9B1 ; output it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1593 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	1594 ldx BINVAL ; get converted number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1595 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	1596 jsr LB821 ; tokenize the input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1597 stb TMPLOC ; save line length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1598 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	1599 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	1600 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	1601 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	1602 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	1603 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	1604 ldu ,x ; get start of next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1605 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	1606 sta ,x+ ; move it down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1607 cmpx VARTAB ; have we moved everything yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1608 bne LACC0 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1609 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	1610 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	1611 ldd VARTAB ; get current end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1612 std V43 ; set as source pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1613 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	1614 adca #0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1615 std V41 ; save destination pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1616 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	1617 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	1618 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	1619 sta ,x+ ; stow it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1620 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	1621 bne LACDD ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1622 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	1623 stx VARTAB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1624 LACE9 bsr LAD21 ; reset variables, etc.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1625 bsr LACEF ; adjust next line pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1626 bra LAC7C ; go read another input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1627 ; Recompute next line pointers
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1628 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	1629 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	1630 beq LAD16 ; brif end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1631 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	1632 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	1633 bne LACF7 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1634 stu ,x ; save new next line pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1635 ldx ,x ; point to next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1636 bra LACF1 ; process the next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1637 ; Find a line in the program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1638 LAD01 ldd BINVAL ; get desired line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1639 ldx TXTTAB ; point to start of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1640 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	1641 beq LAD12 ; brif end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1642 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	1643 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	1644 ldx ,x ; move to next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1645 bra LAD05 ; check another line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1646 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	1647 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	1648 LAD16 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1649 ; NEW command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1650 ; 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	1651 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	1652 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	1653 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	1654 clr ,x+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1655 stx VARTAB ; save end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1656 LAD21 ldx TXTTAB ; get start of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1657 jsr LAEBB ; put input pointer there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1658 LAD26 ldx MEMSIZ ; reset string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1659 stx STRTAB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1660 jsr RESTOR ; reset DATA pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1661 ldx VARTAB ; clear out scalars and arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1662 stx ARYTAB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1663 stx ARYEND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1664 LAD33 ldx #STRSTK ; reset the string stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1665 stx TEMPPT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1666 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	1667 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	1668 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	1669 clr OLDPTR ; reset "CONT" state
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1670 clr OLDPTR+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1671 clr ARYDIS ; un-disable arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1672 jmp ,x ; return to original caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1673 ; FOR command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1674 FOR lda #0x80 ; disable array parsing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1675 sta ARYDIS
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1676 jsr LET ; assign start value to index
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1677 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	1678 leas 2,s ; lose return address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1679 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	1680 ldx TEMPTR ; get address of matched data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1681 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	1682 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	1683 jsr LAC33
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1684 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	1685 ldd CURLIN ; get line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1686 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	1687 ldb #0xa5 ; make sure we have TO
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1688 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1689 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	1690 jsr LB141 ; evaluate terminal condition value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1691 ldb FP0SGN ; pack FPA0 in place
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1692 orb #0x7f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1693 andb FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1694 stb FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1695 ldy #LAD7F ; where to come back to
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1696 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	1697 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	1698 jsr LBC14 ; unpack it to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1699 jsr GETCCH ; get character after the terminal
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1700 cmpa #0xa9 ; is it STEP?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1701 bne LAD90 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1702 jsr GETNCH ; eat STEP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1703 jsr LB141 ; evaluate step condition
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1704 LAD90 jsr LBC6D ; get "status" of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1705 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	1706 ldd VARDES ; get variable descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1707 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	1708 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	1709 pshs a
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1710 ; Main command interpretation loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1711 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	1712 andcc #0xaf ; make sure interrupts are running
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1713 bsr LADEB ; check for BREAK/pause
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1714 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1715 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	1716 lda ,x+ ; get current input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1717 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	1718 cmpa #': ; end of statement?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1719 beq LADC0 ; brif so - keep processing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1720 LADB1 jmp LB277 ; raise a syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1721 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	1722 sta ENDFLG
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1723 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	1724 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	1725 std CURLIN ; set current line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1726 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	1727 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	1728 bsr LADC6 ; process a command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1729 bra LAD9E ; handle next statement or line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1730 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	1731 tsta ; is it a token?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1732 lbpl LET ; brif not - do a LET
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1733 cmpa #0xa3 ; above SKIPF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1734 bhi LADDC ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1735 ldx COMVEC+3 ; point to jump table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1736 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	1737 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	1738 abx
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1739 jsr GETNCH ; move past token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1740 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	1741 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	1742 bls LADB1 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1743 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	1744 ; RESTORE command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1745 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	1746 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	1747 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	1748 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1749 ; BREAK check
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1750 LADEB jsr KEYIN ; read keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1751 beq LADFA ; brif no key down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1752 LADF0 cmpa #3 ; BREAK?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1753 beq STOP ; brif so - do a STOP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1754 cmpa #0x13 ; pause (SHIFT-@)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1755 beq LADFB ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1756 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	1757 LADFA rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1758 LADFB jsr KEYIN ; read keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1759 beq LADFB ; brif no key down
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1760 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	1761 ; END command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1762 ENDTOK jsr LA426 ; close files
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1763 jsr GETCCH ; re-get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1764 bra LAE0B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1765 ; STOP command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1766 STOP orcc #1 ; flag "STOP"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1767 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	1768 ldx CHARAD ; save current input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1769 stx TINPTR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1770 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	1771 leas 2,s ; lose return address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1772 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	1773 cmpx #0xffff ; immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1774 beq LAE22 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1775 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	1776 ldx TINPTR ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1777 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	1778 LAE22 clr DEVNUM ; reset to screen/keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1779 ldx #LABF2-1 ; point to BREAK message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1780 tst ENDFLG ; are we doing "BREAK"?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1781 lbpl LAC73 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1782 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	1783 ; CONT command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1784 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	1785 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	1786 ldx OLDPTR ; get saved execution pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1787 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	1788 stx CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1789 ldx OLDTXT ; reset current line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1790 stx CURLIN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1791 LAE40 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1792 ; CLEAR command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1793 CLEAR beq LAE6F ; brif no argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1794 jsr LB3E6 ; evaluate string space size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1795 pshs d ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1796 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	1797 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	1798 beq LAE5A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1799 jsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1800 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	1801 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	1802 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	1803 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	1804 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	1805 subd ,s++ ; subtract out string space value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1806 bcs LAE72 ; brif less than 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1807 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	1808 subd #STKBUF ; also account for slop space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1809 bcs LAE72 ; brif less than 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1810 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	1811 blo LAE72 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1812 stu FRETOP ; set top of free memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1813 stx MEMSIZ ; set size of usable memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1814 LAE6F jmp LAD26 ; erase variables, etc.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1815 LAE72 jmp LAC44 ; raise OM error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1816 ; RUN command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1817 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	1818 jsr LA426 ; close any open files
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1819 jsr GETCCH ; is there a line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1820 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	1821 jsr LAD26 ; clear variables, etc.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1822 bra LAE9F ; "GOTO" the line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1823 ; GO command (GOTO and GOSUB)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1824 GO tfr a,b ; save TO/SUB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1825 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	1826 cmpb #0xa5 ; TO?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1827 beq LAEA4 ; brif GOTO
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1828 cmpb #0xa6 ; SUB?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1829 bne LAED7 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1830 ldb #3 ; room for 6 bytes?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1831 jsr LAC33
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1832 ldu CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1833 ldx CURLIN ; get line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1834 lda #0xa6 ; flag for GOSUB frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1835 pshs u,x,a ; set stack frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1836 LAE9F bsr LAEA4 ; do "GOTO"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1837 jmp LAD9E ; go back to main loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1838 ; Actual GOTO is here
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1839 LAEA4 jsr GETCCH ; get current input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1840 jsr LAF67 ; convert number to binary
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1841 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	1842 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	1843 ldd BINVAL ; get desired line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1844 cmpd CURLIN ; is it beyond here?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1845 bhi LAEB6 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1846 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	1847 LAEB6 jsr LAD05 ; find line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1848 bcs LAED2 ; brif not found
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1849 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	1850 stx CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1851 LAEBF rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1852 ; RETURN command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1853 RETURN bne LAEBF ; exit if argument given
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1854 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	1855 sta VARDES
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1856 jsr LABF9 ; look for a GOSUB frame
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1857 tfr x,s ; reset stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1858 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	1859 beq LAEDA ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1860 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	1861 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1862 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	1863 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1864 LAED7 jmp LB277 ; raise syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1865 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	1866 stx CURLIN ; reset line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1867 stu CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1868 ; DATA command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1869 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	1870 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1871 ; REM command (also ELSE)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1872 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	1873 stx CHARAD ; save new input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1874 LAEE7 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1875 ; 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	1876 LAEE8 ldb #': ; colon is statement terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1877 skip1lda
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1878 LAEEB clrb ; make main terminator NUL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1879 stb CHARAC ; save terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1880 clrb ; end of line - always terminates
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1881 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1882 LAEF1 tfr b,a ; save secondary terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1883 ldb CHARAC ; get main terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1884 sta CHARAC ; save secondary
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1885 LAEF7 lda ,x ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1886 beq LAEE7 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1887 pshs b ; save terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1888 cmpa ,s+ ; does it match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1889 beq LAEE7 ; brif so - bail
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1890 leax 1,x ; move pointer ahead
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1891 cmpa #'" ; start of string?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1892 beq LAEF1 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1893 inca ; functon token?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1894 bne LAF0C ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1895 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	1896 LAF0C cmpa #0x85+1 ; IF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1897 bne LAEF7 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1898 inc IFCTR ; bump "IF" count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1899 bra LAEF7 ; get check another input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1900 ; IF command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1901 IFTOK jsr LB141 ; evaluate condition
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1902 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	1903 cmpa #0x81 ; GO?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1904 beq LAF22 ; treat same as THEN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1905 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	1906 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1907 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	1908 bne LAF39 ; brif condition true
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1909 clr IFCTR ; reset IF counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1910 LAF28 bsr DATA ; skip over statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1911 tsta ; end of line?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1912 beq LAEE7 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1913 jsr GETNCH ; get start of this statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1914 cmpa #0x84 ; ELSE?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1915 bne LAF28 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1916 dec IFCTR ; is it a matching ELSE?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1917 bpl LAF28 ; brif not - keep looking
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1918 jsr GETNCH ; eat the ELSE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1919 LAF39 jsr GETCCH ; get current input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1920 lbcs LAEA4 ; brif numeric - to a GOTO
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1921 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	1922 ; ON command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1923 ON jsr LB70B ; evaluate index expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1924 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	1925 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1926 pshs a ; save TO/SUB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1927 cmpa #0xa6 ; SUB?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1928 beq LAF54 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1929 cmpa #0xa5 ; TO?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1930 LAF52 bne LAED7 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1931 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	1932 bne LAF5D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1933 puls b ; get TO/SUB token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1934 jmp LAE88 ; go do GOTO or GOSUB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1935 LAF5D jsr GETNCH ; munch a character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1936 bsr LAF67 ; parse line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1937 cmpa #', ; is there another line following?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1938 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	1939 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	1940 ; Parse a line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1941 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	1942 stx BINVAL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1943 LAF6B bcc LAFCE ; brif not numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1944 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	1945 sta CHARAC ; save digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1946 ldd BINVAL ; get accumulated number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1947 cmpa #24 ; will this overflow?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1948 bhi LAF52 ; brif so - raise syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1949 aslb ; times 2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1950 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1951 aslb ; times 4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1952 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1953 addd BINVAL ; times 5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1954 aslb ; times 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1955 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1956 addb CHARAC ; add in digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1957 adca #0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1958 std BINVAL ; save new accumulated number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1959 jsr GETNCH ; fetch next character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1960 bra LAF6B ; process next digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1961 ; 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	1962 LET jsr LB357 ; evaluate destination variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1963 stx VARDES ; save descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1964 ldb #0xb3 ; make sure we have =
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1965 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1966 lda VALTYP ; get destination variable type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1967 pshs a ; save it for later
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1968 jsr LB156 ; evaluate the expression to assign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1969 puls a ; get back original variable type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1970 rora ; put type in C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1971 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	1972 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	1973 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	1974 ldd FRETOP ; get bottom of string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1975 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	1976 bhs LAFBE ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1977 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	1978 blo LAFBE ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1979 LAFB1 ldb ,x ; get length of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1980 jsr LB50D ; allocate space for this string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1981 ldx V4D ; get descriptor pointer back
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1982 jsr LB643 ; copy string into string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1983 ldx #STRDES ; point to temporary string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1984 LAFBE stx V4D ; save descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1985 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	1986 ldu V4D ; get back replacement descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1987 ldx VARDES ; get target descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1988 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	1989 sta ,x ; save new length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1990 sty 2,x ; save new pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1991 LAFCE rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1992 ; READ and INPUT commands.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1993 LAFCF fcc '?REDO' ; The ?REDO message
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1994 fcb 0x0d,0x00
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1995 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	1996 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	1997 beq LAFDF ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1998 LAFDC jmp LAC46 ; raise the error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	1999 LAFDF lda INPFLG ; are we doing INPUT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2000 beq LAFEA ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2001 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	2002 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	2003 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	2004 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	2005 jsr LB99C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2006 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	2007 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	2008 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2009 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	2010 ldx CURLIN ; are we in immediate mode?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2011 leax 1,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2012 beq LAFDC ; brif so - raise ID error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2013 bsr LB002 ; go do the INPUT thing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2014 clr DEVNUM ; reset device to screen/keyboard
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2015 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2016 LB002 cmpa #'# ; is there a device number?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2017 bne LB00F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2018 jsr LA5A5 ; parse device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2019 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	2020 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	2021 LB00F cmpa #'" ; is there a prompt string?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2022 bne LB01E ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2023 jsr LB244 ; parse the prompt string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2024 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	2025 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2026 jsr LB99F ; print the prompt
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2027 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	2028 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	2029 tst DEVNUM ; is it keyboard input?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2030 bne LB049 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2031 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	2032 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	2033 stb ,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2034 bra LB049 ; go process some input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2035 LB02F jsr LB9AF ; send a ?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2036 jsr LB9AC ; send a space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2037 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	2038 bcc LB03F ; brif not BREAK
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2039 leas 4,s ; clean up stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2040 LB03C jmp LAE11 ; go process BREAK
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2041 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	2042 tst CINBFL ; was it EOF?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2043 bne LAFDC ; brif so - raise the error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2044 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2045 READ ldx DATPTR ; fetch current DATA pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2046 skip1lda ; set A to nonzero (for READ)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2047 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	2048 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	2049 stx DATTMP ; save current input location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2050 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	2051 stx VARDES ; save descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2052 ldx CHARAD ; save interpreter input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2053 stx BINVAL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2054 ldx DATTMP ; get data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2055 lda ,x ; is there anything to read?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2056 bne LB069 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2057 lda INPFLG ; is it INPUT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2058 bne LB0B9 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2059 jsr RVEC10 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2060 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	2061 bsr LB02F ; go read an input line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2062 LB069 stx CHARAD ; save data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2063 jsr GETNCH ; fetch next data character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2064 ldb VALTYP ; do we want a number?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2065 beq LB098 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2066 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2067 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	2068 cmpa #'" ; do we have a string delimiter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2069 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	2070 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	2071 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	2072 sta CHARAC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2073 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2074 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	2075 bne LB08B ; brif so - use two NULs
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2076 lda #': ; use colon as one delimiter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2077 sta CHARAC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2078 lda #', ; and use comma as the other
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2079 LB08B sta ENDCHR ; save second terminator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2080 jsr LB51E ; parse out the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2081 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	2082 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	2083 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	2084 LB098 jsr LBD12 ; parse a numeric string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2085 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	2086 LB09E jsr GETCCH ; get current input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2087 beq LB0A8 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2088 cmpa #', ; check for comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2089 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	2090 LB0A8 ldx CHARAD ; get current data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2091 stx DATTMP ; save the data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2092 ldx BINVAL ; restore the interpreter input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2093 stx CHARAD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2094 jsr GETCCH ; get current input from program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2095 beq LB0D5 ; brif end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2096 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	2097 bra LB04E ; go read another item
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2098 LB0B9 stx CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2099 jsr LAEE8 ; search for end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2100 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	2101 tsta ; was it end of line?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2102 bne LB0CD ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2103 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	2104 ldu ,x++ ; get pointer to next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2105 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	2106 ldd ,x++ ; get line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2107 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	2108 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	2109 cmpa #0x86
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2110 bne LB0B9 ; brif not - keep scanning
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2111 bra LB069 ; go process the input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2112 LB0D5 ldx DATTMP ; get data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2113 ldb INPFLG ; were we doing READ?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2114 lbne LADE8 ; brif so - save DATA pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2115 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	2116 beq LB0E7 ; brif not - we consumed everything
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2117 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	2118 jmp LB99C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2119 LB0E7 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2120 LB0E8 fcc '?EXTRA IGNORED'
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2121 fcb 0x0d,0x00
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2122 ; NEXT command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2123 NEXT bne LB0FE ; brif argument given
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2124 ldx ZERO ; set to NULL descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2125 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	2126 LB0FE jsr LB357 ; evaluate the variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2127 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	2128 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	2129 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	2130 ldb #0 ; code for NEXT without FOR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2131 LB10A bra LB153 ; raise the error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2132 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	2133 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	2134 jsr LBC14 ; copy the value to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2135 lda 8,s ; get step direction
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2136 sta FP0SGN ; save as sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2137 ldx VARDES ; point to index variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2138 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	2139 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	2140 leax 9,s ; point to terminal condition
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2141 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	2142 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	2143 beq LB134 ; brif loop complete
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2144 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	2145 stx CURLIN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2146 ldx 16,s
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2147 stx CHARAD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2148 LB131 jmp LAD9E ; return to interpretation loop
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2149 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	2150 jsr GETCCH ; get character after the index
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2151 cmpa #', ; do we have more indexes?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2152 bne LB131 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2153 jsr GETNCH ; munch the comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2154 bsr LB0FE ; go process another value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2155 ; 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	2156 ; 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	2157 ; 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	2158 ;
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2159 ; 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	2160 ; 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	2161 ; 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	2162 ; just how some of this works.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2163 ;
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2164 ; Evaluate numeric expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2165 LB141 bsr LB156 ; evaluate an expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2166 ; TM error if string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2167 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	2168 skip2keepc
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2169 ; TM error if numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2170 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	2171 ; 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	2172 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	2173 bcs LB14F ; brif we want a string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2174 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	2175 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2176 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	2177 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	2178 LB153 jmp LAC46 ; raise the error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2179 ; The general expression evaluation entry point
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2180 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	2181 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	2182 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2183 LB15A pshs b ; save relational operator flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2184 pshs a ; save previous operator precedence
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2185 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	2186 jsr LAC33
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2187 jsr LB223 ; go evaluate the first term
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2188 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	2189 LB168 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2190 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	2191 blo LB181 ; brif below relational operators
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2192 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	2193 bhs LB181 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2194 cmpa #1 ; set C if >
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2195 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	2196 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	2197 cmpa TRELFL ; did the result get lower?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2198 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	2199 sta TRELFL ; save new operator flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2200 jsr GETNCH ; munch the operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2201 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	2202 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	2203 bne LB1B8 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2204 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	2205 adda #7 ; put operators starting at 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2206 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	2207 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	2208 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	2209 adca #-1 ; restore operator number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2210 pshs a ; save operator number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2211 asla ; times 2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2212 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	2213 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	2214 leax a,x ; point to correct entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2215 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	2216 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	2217 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	2218 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	2219 LB1A7 pshs a ; save previous operation precedence
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2220 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	2221 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	2222 puls a ; get back precedence
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2223 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	2224 tsta ; check precedence of previous operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2225 lbeq LB220 ; brif end of expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2226 bra LB203 ; go handle operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2227 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	2228 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	2229 bsr LB1C6 ; back up input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2230 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	2231 stb TRELFL ; save relational comparison flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2232 clr VALTYP ; result will be numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2233 bra LB19F ; to process the operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2234 LB1C6 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2235 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	2236 LB1CB fcb 0x64 ; precedence of relational comparison
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2237 fdb LB2F4 ; handler address for relational comparison
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2238 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	2239 bhs LB203 ; brif so - go process it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2240 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	2241 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	2242 pshs d ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2243 bsr LB1E2 ; push FPA0 onto the stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2244 ldb TRELFL ; get back relational operator flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2245 lbra LB15A ; go evaluate another operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2246 LB1DF jmp LB277 ; raise a syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2247 LB1E2 ldb FP0SGN ; get sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2248 lda ,x ; get precedence of this operation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2249 LB1E6 puls y ; get back original caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2250 pshs b ; save sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2251 LB1EA ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2252 ldx FPA0 ; get mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2253 ldu FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2254 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	2255 jmp ,y ; return to caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2256 LB1F4 ldx ZERO ; point to dummy value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2257 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	2258 beq LB220 ; brif end of expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2259 LB1FA cmpa #0x64 ; relational operation?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2260 beq LB201 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2261 jsr LB143 ; type mismatch if string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2262 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	2263 LB203 puls b ; get relational flags
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2264 cmpa #0x5a ; NOT operation?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2265 beq LB222 ; brif so (it was unary)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2266 cmpa #0x7d ; unary negation?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2267 beq LB222 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2268 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	2269 stb RELFLG ; save relational operator flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2270 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	2271 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	2272 stx FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2273 stu FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2274 puls b ; and the sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2275 stb FP1SGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2276 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	2277 stb RESSGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2278 LB220 ldb FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2279 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	2280 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	2281 clr VALTYP ; set type to numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2282 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	2283 bcc LB22F ; brif not numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2284 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	2285 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	2286 bcc LB284 ; brif alpha character (variable)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2287 cmpa #'. ; decimal point?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2288 beq LB22C ; brif so - evaluate number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2289 cmpa #0xac ; minus?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2290 beq LB27C ; brif so - process unary negation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2291 cmpa #0xab ; plus?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2292 beq LB228 ; brif so - ignore unary "posation"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2293 cmpa #'" ; string delimiter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2294 bne LB24E ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2295 LB244 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2296 jsr LB518 ; go parse the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2297 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	2298 stx CHARAD ; move input pointer past string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2299 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2300 LB24E cmpa #0xa8 ; NOT?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2301 bne LB25F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2302 lda #0x5a ; precedence of unary NOT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2303 jsr LB15A ; process the operand of NOT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2304 jsr INTCNV ; convert to integer in D
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2305 coma ; do a bitwise complement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2306 comb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2307 jmp GIVABF ; resturn the result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2308 LB25F inca ; is it a function token?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2309 beq LB290 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2310 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	2311 jsr LB156 ; evaluate parentheticized expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2312 LB267 ldb #') ; force a )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2313 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2314 LB26A ldb #'( ; force a (
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2315 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2316 LB26D ldb #', ; force a ,
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2317 LB26F cmpb [CHARAD] ; does character match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2318 bne LB277 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2319 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	2320 LB277 ldb #2*1 ; raise syntax error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2321 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2322 LB27C lda #0x7d ; unary negation precedence
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2323 jsr LB15A ; evaluate argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2324 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	2325 LB284 jsr LB357 ; evaluate variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2326 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	2327 lda VALTYP ; test variable type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2328 bne LB222 ; brif string - we're done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2329 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	2330 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	2331 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	2332 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	2333 jsr GETNCH ; eat the token byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2334 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	2335 bls LB29F ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2336 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	2337 LB29F pshs b ; save jump table offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2338 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	2339 blo LB2C7 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2340 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	2341 bhs LB2C9 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2342 bsr LB26A ; force a (
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2343 lda ,s ; get token value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2344 cmpa #2*17 ; is it POINT?
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 jsr LB156 ; evaluate first argument string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2347 bsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2348 jsr LB146 ; TM error if string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2349 puls a ; get token value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2350 ldu FPA0+2 ; get string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2351 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	2352 jsr LB70B ; evaluate first numeric argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2353 puls a ; get back token value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2354 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	2355 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	2356 LB2C7 bsr LB262 ; force a (
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2357 LB2C9 puls b ; get offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2358 ldx COMVEC+8 ; get jump table pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2359 abx ; add offset into table
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2360 jsr [,x] ; go process function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2361 jmp LB143 ; make sure result is numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2362 ; operator OR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2363 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	2364 ; operator AND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2365 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	2366 sta TMPLOC ; save AND/OR flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2367 jsr INTCNV ; convert second argument to intenger
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2368 std CHARAC ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2369 jsr LBC4A ; move first argument to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2370 jsr INTCNV ; convert first argument to integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2371 tst TMPLOC ; is it AND or OR?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2372 bne LB2ED ; brif OR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2373 anda CHARAC ; do the bitwise AND
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2374 andb ENDCHR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2375 bra LB2F1 ; finish up
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2376 LB2ED ora CHARAC ; do the bitwise OR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2377 orb ENDCHR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2378 LB2F1 jmp GIVABF ; return integer result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2379 ; relational comparision operators
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2380 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	2381 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	2382 lda FP1SGN ; pack FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2383 ora #0x7f
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2384 anda FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2385 sta FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2386 ldx #FP1EXP ; point to packed FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2387 jsr LBC96 ; compare FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2388 bra LB33F ; handle truth comparison
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2389 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	2390 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	2391 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	2392 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	2393 stx STRDES+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2394 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	2395 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	2396 lda STRDES ; get length of second argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2397 pshs b ; save length of first argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2398 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	2399 beq LB328 ; brif string lengths are equal
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2400 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	2401 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	2402 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	2403 nega ; invert default comparison result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2404 LB328 sta FP0SGN ; save default truth flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2405 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	2406 incb ; compensate for DECB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2407 LB32D decb ; have we compared everything?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2408 bne LB334 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2409 ldb FP0SGN ; get default truth value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2410 bra LB33F ; decide comparison truth
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2411 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	2412 cmpa ,u+ ; compare with second argument
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2413 beq LB32D ; brif equal - keep comparing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2414 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	2415 bcc LB33F ; brif string A > string B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2416 negb ; invert result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2417 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	2418 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	2419 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	2420 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	2421 ldb #0xff ; set true
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2422 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	2423 ; DIM command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2424 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	2425 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	2426 bsr LB35A ; go allocate the variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2427 jsr GETCCH ; are we done?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2428 bne LB34B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2429 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2430 ; 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	2431 ; 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	2432 ; 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	2433 ; 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	2434 ; specified dimension values.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2435 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	2436 jsr GETCCH
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2437 LB35A stb DIMFLG ; save dimensioning flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2438 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	2439 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	2440 bsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2441 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	2442 clrb ; default second variable character to NUL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2443 stb VALTYP ; set value type to numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2444 jsr GETNCH ; get second character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2445 bcs LB371 ; brif numeric - numbers are allowed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2446 bsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2447 bcs LB37B ; brif not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2448 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	2449 LB373 jsr GETNCH ; get an input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2450 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	2451 bsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2452 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	2453 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	2454 bne LB385 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2455 com VALTYP ; set value type to string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2456 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	2457 jsr GETNCH ; eat the sigil
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2458 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	2459 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	2460 suba #'( ; do we have a subscript?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2461 lbeq LB404 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2462 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	2463 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	2464 ldd VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2465 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	2466 beq LB3AB ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2467 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	2468 beq LB3DC ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2469 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	2470 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	2471 ; Set carry if not upper case alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2472 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	2473 bcs LB3AA ; brif less than A
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2474 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	2475 suba #-('Z+1)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2476 LB3AA rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2477 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	2478 ldu ,s ; get caller address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2479 cmpu #LB287 ; coming from "evaluate term"?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2480 beq LB3DE ; brif so - don't allocate
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2481 ldd ARYEND ; get end of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2482 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	2483 addd #7 ; 7 bytes per scalar entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2484 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	2485 ldx ARYTAB ; get bottom of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2486 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	2487 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	2488 ldx V41 ; get new top of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2489 stx ARYEND ; set new end of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2490 ldx V45 ; get bottom of destination block
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2491 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	2492 ldx V47 ; get old end of variables
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2493 ldd VARNAM ; get name of variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2494 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	2495 clra ; zero out the variable value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2496 clrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2497 std ,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2498 std 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2499 sta 4,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2500 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	2501 LB3DE rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2502 ; Various integer conversion routines
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2503 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	2504 LB3E4 jsr GETNCH ; fetch input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2505 LB3E6 jsr LB141 ; evaluate numeric expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2506 LB3E9 lda FP0SGN ; get sign of value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2507 bmi LB44A ; brif negative (raise FC error)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2508 INTCNV lda FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2509 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	2510 blo LB3FE ; brif smaller than 32768
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2511 ldx #LB3DF ; point to -32678 constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2512 jsr LBC96 ; is FPA0 equal to -32768?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2513 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	2514 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	2515 ldd FPA0+2 ; get the resulting integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2516 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2517 LB404 ldb DIMFLG ; get dimensioning flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2518 lda VALTYP ; get type of variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2519 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	2520 clrb ; reset dimension counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2521 LB40A ldx VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2522 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	2523 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	2524 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	2525 stx VARNAM ; restore variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2526 ldu FPA0+2 ; get dimension size/index
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2527 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	2528 incb ; bump dimension counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2529 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	2530 cmpa #', ; do we have another dimension?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2531 beq LB40A ; brif so - parse it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2532 stb TMPLOC ; save dimension counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2533 jsr LB267 ; make sure we have a )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2534 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	2535 sta VALTYP ; restore variable type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2536 stb DIMFLG ; restore dimensioning flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2537 ldx ARYTAB ; get start of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2538 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	2539 beq LB44F ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2540 ldd VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2541 cmpd ,x ; does it match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2542 beq LB43B ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2543 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	2544 leax d,x ; move to next array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2545 bra LB42A ; go check another entry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2546 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	2547 lda DIMFLG ; are we dimensioning?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2548 bne LB44C ; brif so - raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2549 ldb TMPLOC ; get number of dimensions given
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2550 cmpb 4,x ; does it match?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2551 beq LB4A0 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2552 LB447 ldb #8*2 ; raise "bad subscript"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2553 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2554 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	2555 LB44C jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2556 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	2557 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	2558 ldd VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2559 std ,x ; set array name
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2560 ldb TMPLOC ; get dimension count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2561 stb 4,x ; set dimension count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2562 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	2563 stx V41 ; save array descriptor address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2564 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	2565 clra ; zero extend (??? why not LDD above?)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2566 tst DIMFLG ; are we dimensioning?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2567 beq LB46D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2568 puls a,b ; get dimension size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2569 addd #1 ; account for zero based indexing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2570 LB46D std 5,x ; save dimension size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2571 bsr LB4CE ; multiply by accumulated array size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2572 std COEFPT ; save new array size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2573 leax 2,x ; move to next dimension
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2574 dec TMPLOC ; have we done all dimensions?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2575 bne LB461 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2576 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	2577 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	2578 lbcs LAC44 ; brif it overflows memory
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2579 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	2580 jsr LAC37 ; does array fit in memory?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2581 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	2582 std ARYEND ; save new end of arrays
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2583 clra ; set up for clearing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2584 LB48C leax -1,x ; move back one
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2585 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	2586 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	2587 bne LB48C ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2588 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	2589 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	2590 subd V41 ; subtract start of descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2591 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	2592 lda DIMFLG ; are we dimensioning?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2593 bne LB4CD ; brif so - we're done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2594 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	2595 stb TMPLOC ; initialize counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2596 clra ; initialize accumulated offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2597 clrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2598 LB4A6 std COEFPT ; save accumulated offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2599 puls a,b ; get desired index
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2600 std FPA0+2 ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2601 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	2602 bhs LB4EB ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2603 ldu COEFPT ; get accumulated offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2604 beq LB4B9 ; brif first dimension
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2605 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	2606 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	2607 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	2608 dec TMPLOC ; done all dimensions?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2609 bne LB4A6 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2610 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	2611 aslb ; times 2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2612 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2613 aslb ; times 4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2614 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2615 addd ,s++ ; times 5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2616 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	2617 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	2618 stx VARPTR ; save pointer to element data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2619 LB4CD rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2620 ; 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	2621 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	2622 sta V45 ; save shift counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2623 ldd 5,x ; get multiplier
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2624 std BOTSTK ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2625 clra ; zero out product
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2626 clrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2627 LB4D8 aslb ; shift product left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2628 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2629 bcs LB4EB ; brif we have a carry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2630 asl COEFPT+1 ; shift other factor left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2631 rol COEFPT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2632 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	2633 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	2634 bcs LB4EB ; brif carry - do an error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2635 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	2636 bne LB4D8 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2637 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2638 LB4EB jmp LB447 ; raise a BS error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2639 ; MEM function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2640 ; 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	2641 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	2642 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	2643 skip1 ; return result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2644 ; Convert unsigned value in B to FP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2645 LB4F3 clra ; zero extend
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2646 ; Convert signed value in D to FP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2647 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	2648 std FPA0 ; save value in FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2649 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	2650 jmp LBC82 ; finish conversion to integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2651 ; STR$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2652 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	2653 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	2654 jsr LBDDC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2655 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	2656 ldx #STRBUF+1 ; point to number string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2657 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	2658 ; 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	2659 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	2660 LB50F bsr LB56D ; allocate string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2661 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	2662 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	2663 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2664 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	2665 ; 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	2666 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	2667 LB51A sta CHARAC ; set both delimiters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2668 sta ENDCHR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2669 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	2670 stx RESSGN ; save start of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2671 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	2672 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	2673 LB526 incb ; bump string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2674 lda ,x+ ; get character from string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2675 beq LB537 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2676 cmpa CHARAC ; is it delimiter #1?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2677 beq LB533 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2678 cmpa ENDCHR ; is it delimiter #2?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2679 bne LB526 ; brif not - keep scanning
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2680 LB533 cmpa #'" ; string delimiter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2681 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	2682 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	2683 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	2684 stb STRDES ; save string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2685 ldu RESSGN ; get start of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2686 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	2687 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	2688 bsr LB50D ; allocate string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2689 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	2690 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	2691 ; 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	2692 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	2693 cmpx #CFNBUF ; is the string stack full?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2694 bne LB558 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2695 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	2696 LB555 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2697 LB558 lda STRDES ; get string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2698 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	2699 ldd STRDES+2 ; get string data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2700 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	2701 lda #0xff ; set value type to string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2702 sta VALTYP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2703 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	2704 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	2705 leax 5,x ; advance string stack pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2706 stx TEMPPT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2707 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2708 ; 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	2709 ; 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	2710 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	2711 LB56F clra ; zero extend the length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2712 pshs d ; save requested string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2713 ldd STRTAB ; get current bottom of strings
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2714 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	2715 cmpd FRETOP ; does the string fit?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2716 blo LB585 ; brif not - try compaction
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2717 std STRTAB ; save new bottom of strings
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2718 ldx STRTAB ; get bottom of strings
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2719 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	2720 stx FRESPC ; save the string pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2721 puls b,pc ; restore length and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2722 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	2723 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	2724 beq LB555 ; brif so - raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2725 bsr LB591 ; compact string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2726 puls b ; get back string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2727 bra LB56F ; go try allocation again
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2728 ; Compact string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2729 ; 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	2730 ; 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	2731 ; 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	2732 ; 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	2733 ; 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	2734 ; 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	2735 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	2736 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	2737 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	2738 clrb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2739 std V4B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2740 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	2741 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	2742 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	2743 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	2744 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	2745 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	2746 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	2747 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	2748 LB5AA cmpx ARYTAB ; end of scalars?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2749 beq LB5B2 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2750 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	2751 bra LB5AA ; check another variable
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2752 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	2753 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	2754 LB5B6 cmpx ARYEND ; end of arrays?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2755 beq LB5EF ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2756 ldd 2,x ; get length of array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2757 addd V41 ; add to start of array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2758 std V41 ; save address of next array
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2759 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	2760 bpl LB5B4 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2761 ldb 4,x ; get number of dimensions
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2762 aslb ; two bytes per dimension size
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2763 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	2764 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	2765 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	2766 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	2767 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	2768 bra LB5CA ; process next array element
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2769 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	2770 leax 2,x ; move to variable data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2771 bpl LB5EC ; brif numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2772 LB5D8 ldb ,x ; get length of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2773 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	2774 ldd 2,x ; get data pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2775 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	2776 bhi LB5EC ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2777 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	2778 bls LB5EC ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2779 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	2780 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	2781 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	2782 LB5EE rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2783 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	2784 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	2785 clra ; zero extend length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2786 ldb ,x ; get string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2787 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	2788 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	2789 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	2790 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	2791 stx V41
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2792 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	2793 ldx V4B ; point to string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2794 ldd V45 ; get new data pointer address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2795 std 2,x ; update descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2796 ldx V45 ; get bottom of copy destination
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2797 leax -1,x ; move back below it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2798 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	2799 ; 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	2800 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	2801 pshs d ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2802 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	2803 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	2804 puls x ; get back first string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2805 stx RESSGN ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2806 ldb ,x ; get length of first string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2807 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	2808 addb ,x ; add length of second string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2809 bcc LB62A ; brif combined length is OK
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2810 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	2811 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2812 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	2813 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	2814 ldb ,x ; get length of first string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2815 bsr LB643 ; copy it to string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2816 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	2817 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	2818 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	2819 ldx RESSGN ; get pointer to first string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2820 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	2821 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	2822 jmp LB168 ; return to expression evaluator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2823 ; 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	2824 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	2825 LB645 ldu FRESPC ; get destination address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2826 incb ; compensate for decb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2827 bra LB64E ; do the copy
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2828 LB64A lda ,x+ ; copy a byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2829 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2830 LB64E decb ; done yet?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2831 bne LB64A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2832 stu FRESPC ; save destination pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2833 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2834 ; 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	2835 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	2836 LB657 ldx FPA0+2 ; get descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2837 LB659 ldb ,x ; get length of string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2838 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	2839 bne LB672 ; brif not removed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2840 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	2841 leax -1,x ; move pointer down 1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2842 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	2843 bne LB66F ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2844 pshs b ; save length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2845 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	2846 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	2847 puls b ; get back string length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2848 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	2849 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2850 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	2851 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2852 ; 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	2853 ; 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	2854 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	2855 bne LB680 ; brif not - do nothing
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2856 stx TEMPPT ; save new top of stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2857 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	2858 stx LASTPT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2859 clra ; flag string removed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2860 LB680 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2861 ; LEN function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2862 LEN bsr LB686 ; get string details
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2863 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	2864 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	2865 clr VALTYP ; set value type to numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2866 tstb ; set flags according to length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2867 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2868 ; CHR$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2869 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	2870 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	2871 jsr LB56D
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2872 lda FPA0+3 ; get character code
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2873 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	2874 sta ,x ; put character in string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2875 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	2876 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	2877 ; ASC function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2878 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	2879 bra LB683 ; return unsigned code in B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2880 LB6A4 bsr LB686 ; fetch string details
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2881 beq LB706 ; brif NULL string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2882 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	2883 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2884 ; LEFT$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2885 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	2886 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	2887 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	2888 bls LB6B5 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2889 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	2890 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	2891 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	2892 jsr LB50F ; reserve space in string space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2893 ldx V4D ; point to original string descriptor
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2894 bsr LB659 ; get string details
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2895 puls b ; get string offset
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2896 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	2897 puls b ; get length of copy
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2898 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	2899 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	2900 ; RIGHT$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2901 RIGHT bsr LB6F5 ; get arguments from stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2902 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	2903 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	2904 bra LB6AE ; go handle everything else
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2905 ; MID$ function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2906 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	2907 stb FPA0+3 ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2908 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	2909 cmpa #') ; end of function?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2910 beq LB6DE ; brif so - no length
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2911 jsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2912 bsr LB70B ; get length parameter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2913 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	2914 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	2915 clrb ; clear length counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2916 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	2917 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	2918 bhs LB6B5 ; brif so - return NULL string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2919 tfr a,b ; save absolute position parameter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2920 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	2921 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	2922 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	2923 bls LB6B5 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2924 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	2925 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	2926 ; 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	2927 ; 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	2928 ; 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	2929 LB6F5 jsr LB267 ; make sure we have )
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2930 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	2931 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	2932 stx V4D ; save descriptor adddress
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2933 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	2934 ldb 4,s
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2935 leas 7,s ; clean up stack
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2936 tfr u,pc ; return to original caller
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2937 LB706 jmp LB44A ; raise FC error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2938 ; 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	2939 LB709 jsr GETNCH ; move to next character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2940 LB70B jsr LB141 ; evaluate a numeric expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2941 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	2942 tsta ; are we negative or > 255?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2943 bne LB706 ; brif so - FC error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2944 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	2945 ; VAL function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2946 VAL jsr LB686 ; get string details
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2947 lbeq LBA39 ; brif NULL string - return 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2948 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	2949 stx CHARAD ; point interpreter at string data
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2950 abx ; calculate end address of the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2951 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	2952 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	2953 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	2954 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	2955 jsr LBD12 ; evaluate numeric expression in string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2956 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	2957 sta ,x ; restore byte after string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2958 stu CHARAD ; restore interpeter's input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2959 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2960 ; 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	2961 LB734 bsr LB73D ; evaluate expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2962 stx BINVAL ; save result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2963 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	2964 bra LB70B ; evaluate unsigned expression to B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2965 ; Evaluate unsigned expression in X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2966 LB73D jsr LB141 ; evaluate numeric expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2967 LB740 lda FP0SGN ; is it negative?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2968 bmi LB706 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2969 lda FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2970 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	2971 bhi LB706 ; brif too large
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2972 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	2973 ldx FPA0+2 ; get resulting unsigned value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2974 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2975 ; PEEK function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2976 PEEK bsr LB740 ; get address to X
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2977 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	2978 jmp LB4F3 ; return B as unsigned value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2979 ; POKE function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2980 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	2981 ldx BINVAL ; get address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2982 stb ,x ; put value there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2983 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2984 ; LLIST command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2985 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	2986 stb DEVNUM
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2987 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	2988 ; LIST command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2989 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	2990 jsr LAF67 ; parse line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2991 jsr LAD01 ; find address of that line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2992 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	2993 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	2994 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	2995 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	2996 beq LB789 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2997 cmpa #0xac ; is it "-"?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2998 bne LB783 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	2999 jsr GETNCH ; eat the "-"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3000 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	3001 jsr LAF67 ; evaluate the second number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3002 beq LB789 ; brif illegal number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3003 LB783 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3004 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	3005 stu BINVAL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3006 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	3007 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	3008 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	3009 jsr LA549 ; do a break check
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3010 ldd ,x ; get address of next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3011 bne LB79F ; brif not end of program
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3012 LB797 jsr LA42D ; close output file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3013 clr DEVNUM ; reset device to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3014 jmp LAC73 ; go back to immediate mode
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3015 LB79F stx LSTTXT ; save new line address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3016 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	3017 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	3018 bhi LB797 ; brif so - return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3019 jsr LBDCC ; display line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3020 jsr LB9AC ; put a space after it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3021 ldx LSTTXT ; get line address
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3022 bsr LB7C2 ; detokenize the line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3023 ldx [LSTTXT] ; get pointer to next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3024 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	3025 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	3026 beq LB78D ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3027 jsr LB9B1 ; output character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3028 bra LB7B9 ; handle next character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3029 ; 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	3030 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	3031 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	3032 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	3033 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	3034 beq LB820 ; brif end of input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3035 bmi LB7E6 ; brif it's a token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3036 cmpa #': ; colon?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3037 bne LB7E2 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3038 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	3039 cmpb #0x84 ; ELSE?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3040 beq LB7CB ; brif so - suppress the colon
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3041 cmpb #0x83 ; '?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3042 beq LB7CB ; brif so - suppress the colon
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3043 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3044 LB7E0 lda #'! ; placeholder for unknown token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3045 LB7E2 bsr LB814 ; stow output character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3046 bra LB7CB ; go process another input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3047 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	3048 cmpa #0xff ; is it a function?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3049 bne LB7F1 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3050 lda ,x+ ; get function token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3051 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	3052 LB7F1 anda #0x7f ; remove token bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3053 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	3054 tst ,u ; is this table active?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3055 beq LB7E0 ; brif not - use place holder
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3056 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	3057 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	3058 adda ,u ; undo extra subtraction
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3059 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	3060 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	3061 bmi LB80A ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3062 LB804 tst ,u+ ; end of entry?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3063 bpl LB804 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3064 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	3065 LB80A lda ,u ; get character from wordlist
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3066 bsr LB814 ; put character in the buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3067 tst ,u+ ; end of word?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3068 bpl LB80A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3069 bra LB7CB ; go handle another input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3070 LB814 cmpy #LINBUF+LBUFMX ; is there room?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3071 bhs LB820 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3072 anda #0x7f ; lose bit 7
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3073 sta ,y+ ; save character in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3074 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	3075 LB820 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3076 ; 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	3077 ; length in D
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3078 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	3079 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3080 ldu #LINBUF ; set destination pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3081 LB829 clr V43 ; clear alpha string flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3082 clr V44 ; clear DATA flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3083 LB82D lda ,x+ ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3084 beq LB852 ; brif end of input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3085 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	3086 beq LB844 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3087 jsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3088 bcc LB852 ; brif alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3089 cmpa #'0 ; is it below the digits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3090 blo LB842 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3091 cmpa #'9 ; is it within the digits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3092 bls LB852 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3093 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	3094 LB844 cmpa #0x20 ; space?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3095 beq LB852 ; brif so - keep it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3096 sta V42 ; save scan delimiter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3097 cmpa #'" ; string delimiter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3098 beq LB886 ; brif so - copy until another "
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3099 tst V44 ; doing "DATA"?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3100 beq LB86B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3101 LB852 sta ,u+ ; put character in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3102 beq LB85C ; brif end of input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3103 cmpa #': ; colon?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3104 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	3105 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	3106 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	3107 clr ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3108 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	3109 subd #LINHDR
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3110 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	3111 stx CHARAD ; set input pointer there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3112 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3113 LB86B cmpa #'? ; print abbreviation?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3114 bne LB873 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3115 lda #0x87 ; token for PRINT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3116 bra LB852 ; go stash it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3117 LB873 cmpa #'' ; REM abbreviation?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3118 bne LB88A ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3119 ldd #0x3a83 ; colon plus ' token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3120 std ,u++ ; put it in the output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3121 LB87C clr V42 ; set delimiter to NUL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3122 LB87E lda ,x+ ; get input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3123 beq LB852 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3124 cmpa V42 ; at the delimiter?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3125 beq LB852 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3126 LB886 sta ,u+ ; save in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3127 bra LB87E ; keep scanning for delimiter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3128 LB88A cmpa #'0 ; is it below digits?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3129 blo LB892 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3130 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	3131 blo LB852 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3132 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	3133 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	3134 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	3135 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	3136 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	3137 LB89D leau 10,u ;
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3138 lda ,u ; get number of reserved words
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3139 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	3140 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	3141 LB8A6 ldx ,s ; get input pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3142 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	3143 subb ,x+ ; compare with input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3144 beq LB8A8 ; brif exact match
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3145 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	3146 bne LB8EA ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3147 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	3148 puls u ; get back output pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3149 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	3150 lda V41 ; get token type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3151 bne LB8C2 ; brif function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3152 cmpb #0x84 ; is it ELSE?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3153 bne LB8C6 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3154 lda #': ; silently add a colon before ELSE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3155 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	3156 bra LB85A ; go handle more input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3157 LB8C6 stb ,u+ ; save single byte token
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3158 cmpb #0x86 ; DATA?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3159 bne LB8CE ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3160 inc V44 ; set DATA flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3161 LB8CE cmpb #0x82 ; REM?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3162 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	3163 LB8D2 bra LB85A ; go handle more input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3164 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	3165 LB8D7 com V41 ; invert token flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3166 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	3167 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	3168 lda ,x+ ; copy first character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3169 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3170 jsr LB3A2 ; set C if not alpha
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3171 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	3172 com V43 ; set alphanumeric string flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3173 bra LB8D2 ; process more input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3174 LB8EA inc V42 ; bump token number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3175 deca ; checked all in this table?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3176 beq LB89D ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3177 leay -1,y ; unconsume last compared character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3178 LB8F1 ldb ,y+ ; end of entry?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3179 bpl LB8F1 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3180 bra LB8A6 ; check next reserved word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3181 ; PRINT command
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3182 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	3183 bsr LB8FE ; process print options
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3184 clr DEVNUM ; reset output to screen
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3185 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3186 LB8FE cmpa #'@ ; is it PRINT @?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3187 bne LB907 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3188 jsr LA554 ; move cursor to correct location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3189 bra LB911 ; handle some more
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3190 LB907 cmpa #'# ; device number specified?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3191 bne LB918 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3192 jsr LA5A5 ; parse device number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3193 jsr LA406 ; check for valid output file
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3194 LB911 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3195 beq LB958 ; brif nothing - do newline
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3196 jsr LB26D ; need comma after @ or #
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3197 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	3198 LB91B beq LB965 ; brif end of input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3199 LB91D cmpa #0xa4 ; TAB(?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3200 beq LB97E ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3201 cmpa #', ; comma (next tab field)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3202 beq LB966 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3203 cmpa #'; ; semicolon (do not advance print position)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3204 beq LB997 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3205 jsr LB156 ; evaluate expression
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3206 lda VALTYP ; get type of value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3207 pshs a ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3208 bne LB938 ; brif string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3209 jsr LBDD9 ; convert FP number to string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3210 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	3211 LB938 bsr LB99F ; print string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3212 puls b ; get back variable type
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3213 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3214 tst PRTDEV ; is it a display device?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3215 beq LB949 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3216 bsr LB958 ; do a newline
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3217 jsr GETCCH ; get input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3218 bra LB91B ; process more print stuff
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3219 LB949 tstb ; set flags on print position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3220 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	3221 jsr GETCCH ; get current input
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3222 cmpa #', ; comma?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3223 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	3224 bsr LB9AC ; send a space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3225 LB954 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3226 bne LB91D ; brif not end of statement
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3227 LB958 lda #0x0d ; carriage return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3228 bra LB9B1 ; send it to output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3229 LB95C jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3230 LB95F beq LB958 ; brif width is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3231 lda DEVPOS ; get line position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3232 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	3233 LB965 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3234 LB966 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3235 beq LB975 ; brif line width is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3236 ldb DEVPOS ; get line position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3237 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	3238 blo LB977 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3239 bsr LB958 ; move to next line
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3240 bra LB997 ; handle more stuff
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3241 LB975 ldb DEVPOS ; get line position
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3242 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	3243 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	3244 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	3245 bra LB98E ; go advance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3246 LB97E jsr LB709 ; evaluate TAB distance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3247 cmpa #') ; closing )?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3248 lbne LB277 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3249 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3250 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	3251 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	3252 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	3253 bne LB997 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3254 LB992 bsr LB9AC ; output a space
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3255 decb ; done enough?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3256 bne LB992 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3257 LB997 jsr GETNCH ; get input character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3258 jmp LB91B ; process more items
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3259 ; cpoy string from (X-1) to output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3260 LB99C jsr LB518 ; parse the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3261 LB99F jsr LB657 ; get string details
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3262 LB9A2 incb ; compensate for decb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3263 LB9A3 decb ; done all of the string?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3264 beq LB965 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3265 lda ,x+ ; get character from string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3266 bsr LB9B1 ; send to output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3267 bra LB9A3 ; go do another character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3268 LB9AC lda #0x20 ; space character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3269 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3270 LB9AF lda #'? ; question mark character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3271 LB9B1 jmp PUTCHR ; output character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3272 ; 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	3273 ; 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	3274 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	3275 bra LB9C2 ; add 0.5 to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3276 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	3277 ; subtraction operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3278 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	3279 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	3280 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	3281 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	3282 ; addition operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3283 LB9C5 tstb ; check exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3284 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	3285 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	3286 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	3287 tstb ; is FPA1 0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3288 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	3289 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	3290 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	3291 bmi LB9E2 ; brif FPA0 > FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3292 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	3293 lda FP1SGN ; also copy sign over
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3294 sta FP0SGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3295 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	3296 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	3297 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	3298 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	3299 clra ; clear overflow byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3300 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	3301 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	3302 LB9EC ldb RESSGN ; get the sign flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3303 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	3304 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	3305 com 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3306 com 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3307 com 4,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3308 coma
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3309 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	3310 LB9FB sta FPSBYT ; save extra precision byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3311 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	3312 adca FPA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3313 sta FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3314 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3315 adca FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3316 sta FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3317 lda FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3318 adca FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3319 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3320 lda FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3321 adca FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3322 sta FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3323 tstb ; were signs the same?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3324 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	3325 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	3326 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	3327 LBA1C clrb ; clear temporary exponent accumulator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3328 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	3329 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	3330 lda FPA0+1 ; shift left 8 bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3331 sta FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3332 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3333 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3334 lda FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3335 sta FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3336 lda FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3337 sta FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3338 clr FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3339 addb #8 ; account for 8 bits shifted
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3340 cmpb #5*8 ; shifted 5 bytes worth?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3341 blt LBA1D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3342 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	3343 LBA3A sta FP0EXP ; set exponent and sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3344 sta FP0SGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3345 LBA3E rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3346 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	3347 clrb ; clear carry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3348 bra LB9EC ; get on with adding
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3349 LBA44 incb ; account for one bit shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3350 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	3351 rol FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3352 rol FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3353 rol FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3354 rol FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3355 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	3356 lda FP0EXP ; get exponent of result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3357 pshs b ; subtract shift count from exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3358 suba ,s+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3359 sta FP0EXP ; save adjusted exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3360 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	3361 skip2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3362 LBA5C bcs LBA66 ; brif mantissa overflowed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3363 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	3364 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	3365 sta FPSBYT ; clear out extra precision bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3366 bra LBA72 ; go round off result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3367 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	3368 beq LBA92 ; brif we overflowed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3369 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	3370 ror FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3371 ror FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3372 ror FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3373 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	3374 bsr LBA83 ; add one to mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3375 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	3376 LBA78 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3377 LBA79 com FP0SGN ; invert sign of value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3378 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	3379 com FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3380 com FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3381 com FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3382 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	3383 leax 1,x ; bump low word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3384 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3385 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	3386 ldx FPA0 ; bump high word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3387 leax 1,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3388 stx FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3389 LBA91 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3390 LBA92 ldb #2*5 ; code for overflow
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3391 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3392 LBA97 ldx #FPA2-1 ; point to FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3393 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	3394 sta FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3395 lda 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3396 sta 4,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3397 lda 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3398 sta 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3399 lda 1,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3400 sta 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3401 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	3402 sta 1,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3403 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	3404 ble LBA9A ; brif more shifts needed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3405 lda FPSBYT ; get sub byte (extra precision)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3406 subb #8 ; undo the 8 added above
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3407 beq LBAC4 ; brif difference is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3408 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	3409 LBABA ror 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3410 ror 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3411 ror 4,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3412 rora
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3413 incb ; account for one shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3414 bne LBAB8 ; brif not enought shifts yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3415 LBAC4 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3416 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	3417 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	3418 ; multiplication operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3419 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	3420 bsr LBB48 ; calculate exponent of product
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3421 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	3422 sta FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3423 sta FPA2+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3424 sta FPA2+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3425 sta FPA2+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3426 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	3427 bsr LBB00
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3428 ldb FPSBYT ; save extra precision byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3429 stb VAE
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3430 ldb FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3431 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	3432 ldb FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3433 stb VAD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3434 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	3435 bsr LBB00
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 VAC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3438 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	3439 bsr LBB02
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 VAB
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3442 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	3443 jmp LBA1C ; normalize
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3444 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	3445 LBB02 coma ; set carry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3446 LBB03 lda FPA2 ; get FPA2 MS byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3447 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	3448 beq LBB2E ; brif 8 shifts done
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3449 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	3450 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	3451 adda FPA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3452 sta FPA2+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3453 lda FPA2+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3454 adca FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3455 sta FPA2+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3456 lda FPA2+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3457 adca FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3458 sta FPA2+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3459 lda FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3460 adca FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3461 LBB20 rora ; shift carry into FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3462 sta FPA2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3463 ror FPA2+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3464 ror FPA2+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3465 ror FPA2+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3466 ror FPSBYT
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3467 clra ; clear carry
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3468 bra LBB03
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3469 LBB2E rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3470 ; Unpack FP value from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3471 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	3472 sta FP1SGN ; save sign bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3473 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	3474 std FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3475 ldb FP1SGN ; get sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3476 eorb FP0SGN ; set if FPA0 sign differs
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3477 stb RESSGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3478 ldd 3,x ; copy remainder of mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3479 std FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3480 lda ,x ; and exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3481 sta FP1EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3482 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	3483 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3484 ; 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	3485 LBB48 tsta ; is FPA1 zero?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3486 beq LBB61 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3487 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	3488 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	3489 rola
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3490 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	3491 adda #0x80 ; restore the bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3492 sta FP0EXP ; set result exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3493 beq LBB63 ; brif 0 - clear FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3494 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	3495 sta FP0SGN ; so set it as such
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3496 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3497 LBB5C lda FP0SGN ; get sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3498 coma ; invert sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3499 bra LBB63 ; zero sign and exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3500 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	3501 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	3502 LBB67 jmp LBA92 ; raise overflow error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3503 ; 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	3504 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	3505 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	3506 adda #2 ; this gives "times 4"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3507 bcs LBB67 ; raise overflow if required
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3508 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	3509 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	3510 inc FP0EXP ; times 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3511 beq LBB67 ; brif overflow
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3512 LBB7C rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3513 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	3514 ; Divide by 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3515 LBB82 jsr LBC5F ; move FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3516 ldx #LBB7D ; point to constant 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3517 clrb ; zero sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3518 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	3519 jsr LBC14 ; unpack constant 10 to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3520 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	3521 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	3522 ; division operator
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3523 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	3524 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	3525 bsr LBB48 ; calculate exponent of quotient
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3526 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	3527 beq LBB67 ; brif overflow
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3528 ldx #FPA2 ; point to temporary storage location
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3529 ldb #4 ; do 5 bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3530 stb TMPLOC ; save counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3531 ldb #1 ; shift counter and quotient byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3532 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	3533 cmpa FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3534 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3535 lda FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3536 cmpa FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3537 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3538 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3539 cmpa FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3540 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3541 lda FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3542 cmpa FPA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3543 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3544 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	3545 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	3546 rolb ; rotate carry into quotient
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3547 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	3548 stb ,x+ ; save quotient byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3549 dec TMPLOC ; done enough bytes?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3550 bmi LBBFC ; brif done all 5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3551 beq LBBF8 ; brif last byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3552 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	3553 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	3554 bcs LBBDE ; brif it "went"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3555 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	3556 rol FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3557 rol FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3558 rol FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3559 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	3560 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	3561 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	3562 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	3563 suba FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3564 sta FPA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3565 lda FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3566 sbca FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3567 sta FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3568 lda FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3569 sbca FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3570 sta FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3571 lda FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3572 sbca FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3573 sta FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3574 bra LBBD0 ; go check for another go
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3575 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	3576 bra LBBCC ; go do the last byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3577 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	3578 rorb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3579 rorb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3580 stb FPSBYT ; save result extra precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3581 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	3582 jmp LBA1C ; go normalize the result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3583 LBC06 ldb #2*10 ; division by zero
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3584 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3585 ; Copy mantissa of FPA2 to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3586 LBC0B ldx FPA2 ; copy high word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3587 stx FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3588 ldx FPA2+2 ; copy low word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3589 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3590 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3591 ; unpack FP number at (X) to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3592 LBC14 pshs a ; save register
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3593 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	3594 sta FP0SGN ; set sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3595 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	3596 std FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3597 clr FPSBYT ; clear extra precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3598 ldb ,x ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3599 ldx 3,x ; copy mantissa low word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3600 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3601 stb FP0EXP ; save exponent (and set flags)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3602 puls a,pc ; restore register and return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3603 LBC2A ldx #V45 ; point to FPA4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3604 bra LBC35 ; pack FPA0 there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3605 LBC2F ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3606 skip2 ; fall through to pack FPA0 there
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3607 LBC33 ldx VARDES ; get variable descriptor pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3608 ; Pack FPA0 to (X)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3609 LBC35 lda FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3610 sta ,x ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3611 lda FP0SGN ; get sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3612 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	3613 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	3614 sta 1,x ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3615 lda FPA0+1 ; copy next highest byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3616 sta 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3617 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	3618 stu 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3619 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3620 ; 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	3621 LBC4A lda FP1SGN ; copy sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3622 LBC4C sta FP0SGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3623 ldx FP1EXP ; copy exponent, mantissa high byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3624 stx FP0EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3625 clr FPSBYT ; clear extra precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3626 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	3627 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3628 lda FP0SGN ; set sign for return
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3629 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	3630 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3631 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3632 ; Copy FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3633 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	3634 std FP1EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3635 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	3636 stx FPA1+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3637 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	3638 stx FPA1+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3639 tsta ; set flags on exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3640 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3641 ; 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	3642 LBC6D ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3643 beq LBC79 ; brif 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3644 LBC71 ldb FP0SGN ; get sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3645 LBC73 rolb ; get sign to C
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3646 ldb #0xff ; set for negative result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3647 bcs LBC79 ; brif negative
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3648 negb ; set to 1 for positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3649 LBC79 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3650 ; SGN function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3651 SGN bsr LBC6D ; get sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3652 LBC7C stb FPA0 ; save result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3653 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	3654 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	3655 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	3656 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	3657 LBC86 stb FP0EXP ; set exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3658 ldd ZERO ; clear out low word
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3659 std FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3660 sta FPSBYT ; clear extra precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3661 sta FP0SGN ; set sign to positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3662 jmp LBA18 ; normalize the result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3663 ; ABS function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3664 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	3665 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3666 ; 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	3667 ; 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	3668 LBC96 ldb ,x ; get exponent of (X)
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3669 beq LBC6D ; brif (X) is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3670 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	3671 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	3672 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	3673 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	3674 cmpb ,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3675 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3676 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	3677 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	3678 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	3679 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	3680 bne LBCC3 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3681 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	3682 cmpb 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3683 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3684 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	3685 cmpb 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3686 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3687 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	3688 subb 4,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3689 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3690 rts ; return B = 0 if (X) = FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3691 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	3692 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	3693 bra LBC73 ; interpret comparison result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3694 ; 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	3695 ; result as a two's complement value.
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3696 LBCC8 ldb FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3697 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	3698 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	3699 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	3700 bpl LBCD7 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3701 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	3702 jsr LBA7B
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3703 LBCD7 ldx #FP0EXP ; point to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3704 cmpb #-8 ; moving by whole bytes?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3705 bgt LBCE4 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3706 jsr LBAAE ; do bit shifting
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3707 clr FPCARY ; clear carry in byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3708 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3709 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	3710 lda FP0SGN ; get sign of value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3711 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	3712 ror FPA0 ; shift the first bit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3713 jmp LBABA ; do the shifting dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3714 ; INT function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3715 INT ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3716 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	3717 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	3718 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	3719 stb FPSBYT ; save extra precision bits
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3720 lda FP0SGN ; get original sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3721 stb FP0SGN ; force result to be positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3722 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	3723 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	3724 sta FP0EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3725 lda FPA0+3 ; save low byte
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3726 sta CHARAC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3727 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	3728 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	3729 stb FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3730 stb FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3731 stb FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3732 LBD11 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3733 ; Convert ASCII string to FP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3734 ; 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	3735 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	3736 stx FP0SGN
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3737 stx FP0EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3738 stx FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3739 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3740 stx V47
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3741 stx V45
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3742 bcs LBD86 ; brif input character is numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3743 jsr RVEC19 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3744 cmpa #'- ; regular negative sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3745 bne LBD2D ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3746 com COEFCT ; invert sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3747 bra LBD31 ; process stuff after the sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3748 LBD2D cmpa #'+ ; regular plus?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3749 bne LBD35 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3750 LBD31 jsr GETNCH ; get character after sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3751 bcs LBD86 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3752 LBD35 cmpa #'. ; decimal point?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3753 beq LBD61 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3754 cmpa #'E ; scientific notation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3755 bne LBD65 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3756 jsr GETNCH ; eat the "E"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3757 bcs LBDA5 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3758 cmpa #0xac ; negative sign (token)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3759 beq LBD53 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3760 cmpa #'- ; regular negative?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3761 beq LBD53 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3762 cmpa #0xab ; plus sign (token)?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3763 beq LBD55 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3764 cmpa #'+ ; regular plus?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3765 beq LBD55
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3766 bra LBD59 ; brif no sign found
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3767 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	3768 LBD55 jsr GETNCH ; eat the sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3769 bcs LBDA5 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3770 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	3771 beq LBD65 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3772 neg V47 ; negate base 10 exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3773 bra LBD65
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3774 LBD61 com V46 ; toggle decimal point flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3775 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	3776 LBD65 lda V47 ; get base 10 exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3777 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	3778 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	3779 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	3780 bpl LBD78 ; brif positive exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3781 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	3782 inc V47 ; bump exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3783 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	3784 bra LBD7F ; return result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3785 LBD78 jsr LBB6A ; multiply by 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3786 dec V47 ; downshift the exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3787 bne LBD78 ; brif not at 0 yet
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3788 LBD7F lda COEFCT ; get desired sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3789 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	3790 jmp LBEE9 ; flip the sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3791 LBD86 ldb V45 ; get the decimal count
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3792 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	3793 stb V45
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3794 pshs a ; save new digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3795 jsr LBB6A ; multiply partial result by 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3796 puls b ; get back digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3797 subb #'0 ; remove ASCII bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3798 bsr LBD99 ; add B to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3799 bra LBD31 ; go process another digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3800 LBD99 jsr LBC2F ; save FPA0 to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3801 jsr LBC7C ; convert B to FP number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3802 ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3803 jmp LB9C2 ; add FPA3 and FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3804 LBDA5 ldb V47 ; get exponent value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3805 aslb ; times 2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3806 aslb ; times 4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3807 addb V47 ; times 5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3808 aslb ; times 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3809 suba #'0 ; remove ASCII bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3810 pshs b ; save acculated result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3811 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	3812 sta V47 ; save new accumulated decimal exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3813 bra LBD55 ; interpret another exponent character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3814 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	3815 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	3816 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	3817 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	3818 bsr LBDD6 ; output the string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3819 ldd CURLIN ; get basic line number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3820 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	3821 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	3822 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	3823 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	3824 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	3825 LBDD6 jmp LB99C ; output string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3826 ; Convert FP number to ASCII string
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3827 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	3828 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	3829 ldb FP0SGN ; get sign of value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3830 bpl LBDE4 ; brif positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3831 lda #'- ; use negative sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3832 LBDE4 sta ,u+ ; save sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3833 stu COEFPT ; save output buffer pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3834 sta FP0SGN ; save sign character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3835 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	3836 ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3837 lbeq LBEB8 ; brif FPA0 is 0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3838 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	3839 cmpb #0x80 ; is number > 1?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3840 bhi LBDFF ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3841 ldx #LBDC0 ; point to 1E+09
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3842 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	3843 lda #-9 ; account for shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3844 LBDFF sta V45 ; save base 10 exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3845 LBE01 ldx #LBDBB ; point to 999999999
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3846 jsr LBCA0 ; are we above that?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3847 bgt LBE18 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3848 LBE09 ldx #LBDB6 ; point to 99999999.9
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3849 jsr LBCA0 ; are we above that?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3850 bgt LBE1F ; brif in range
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3851 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	3852 dec V45 ; account for shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3853 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	3854 LBE18 jsr LBB82 ; divide by 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3855 inc V45 ; account for shift
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3856 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	3857 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	3858 jsr LBCC8 ; do the integer dance
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3859 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	3860 lda V45 ; get base 10 exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3861 adda #10 ; account for "unormalized" number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3862 bmi LBE36 ; brif number < 1.0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3863 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	3864 bhs LBE36 ; brif so - do scientific notation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3865 deca
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3866 tfr a,b
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3867 lda #2 ; force no scientific notation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3868 LBE36 deca ; subtract wo without affecting carry
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 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	3871 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	3872 bgt LBE4B ; brif >= 1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3873 ldu COEFPT ; point to string buffer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3874 lda #'. ; put decimal
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3875 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3876 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	3877 beq LBE4B ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3878 lda #'0 ; store a zero
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 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	3881 ldb #0x80 ; set digit counter to 0x80
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3882 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	3883 adda 3,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3884 sta FPA0+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3885 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3886 adca 2,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3887 sta FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3888 lda FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3889 adca 1,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3890 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3891 lda FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3892 adca ,x
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3893 sta FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3894 incb ; add one to digit counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3895 rorb ; put carry into bit 7
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3896 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	3897 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	3898 bcc LBE72 ; brif negative mantissa
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3899 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	3900 negb
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3901 LBE72 addb #'0-1 ; add ASCII bias
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3902 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	3903 tfr b,a ; save digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3904 anda #0x7f ; remove add/subtract flag
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3905 sta ,u+ ; put in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3906 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	3907 bne LBE84 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3908 lda #'. ; put decimal
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3909 sta ,u+
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3910 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	3911 andb #0x80 ; only keep bit 7
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3912 cmpx #LBEC5+9*4 ; done all places?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3913 bne LBE50 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3914 LBE8C lda ,-u ; get last character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3915 cmpa #'0 ; was it 0?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3916 beq LBE8C ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3917 cmpa #'. ; decimal?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3918 bne LBE98 ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3919 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	3920 LBE98 lda #'+ ; plus sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3921 ldb V47 ; get scientific notation exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3922 beq LBEBA ; brif not scientific notation
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3923 bpl LBEA3 ; brif positive exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3924 lda #'- ; negative sign for base 10 exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3925 negb ; switch to positive exponent
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3926 LBEA3 sta 2,u ; put sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3927 lda #'E ; put "E"
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3928 sta 1,u
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3929 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	3930 LBEAB inca ; bump digit
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3931 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	3932 bcc LBEAB ; brif not
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3933 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	3934 std 3,u ; put exponent in output
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3935 clr 5,u ; put trailing NUL
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3936 bra LBEBC ; go reset pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3937 LBEB8 sta ,u ; store last character
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3938 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	3939 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	3940 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3941 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	3942 LBEC5 fqb -100000000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3943 fqb 10000000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3944 fqb -1000000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3945 fqb 100000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3946 fqb -10000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3947 fqb 1000
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3948 fqb -100
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3949 fqb 10
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3950 fqb -1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3951 LBEE9 lda FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3952 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	3953 com FP0SGN ; flip sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3954 LBEEF rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3955 ; Expand a polynomial of the form
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3956 ; 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	3957 LBEF0 stx COEFPT ; save coefficient table pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3958 jsr LBC2F ; copy FPA0 to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3959 bsr LBEFC ; multiply FPA3 by FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3960 bsr LBF01 ; expand polynomial
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3961 ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3962 LBEFC jmp LBACA ; multiply FPA0 by FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3963 LBEFF stx COEFPT ; save coefficient table counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3964 LBF01 jsr LBC2A ; move FPA0 to FPA4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3965 ldx COEFPT ; get the current coefficient
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3966 ldb ,x+ ; get the number of entries
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3967 stb COEFCT ; save as counter
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3968 stx COEFPT ; save new pointer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3969 LBF0C bsr LBEFC ; multiply (X) and FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3970 ldx COEFPT ; get this coefficient
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3971 leax 5,x ; move to next one
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 jsr LB9C2 ; add (X) to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3974 ldx #V45 ; point X to FPA4
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3975 dec COEFCT ; done all coefficients?
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3976 bne LBF0C ; brif more left
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3977 rts
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3978 ; RND function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3979 RND jsr LBC6D ; set flags on FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3980 bmi LBF45 ; brif negative - set seed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3981 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	3982 bsr LBF38 ; convert to integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3983 jsr LBC2F ; save range value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3984 bsr LBF3B ; get random number
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3985 ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3986 bsr LBEFC ; multply (X) by FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3987 ldx #LBAC5 ; point to FP 1.0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3988 jsr LB9C2 ; add 1 to FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3989 LBF38 jmp INT ; return integer value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3990 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	3991 stx FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3992 ldx RVSEED+3
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3993 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3994 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	3995 stx FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3996 ldx RSEED+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3997 stx FPA1+2
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3998 jsr LBAD0 ; multiply them
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	3999 ldd VAD ; get lowest order product bytes
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4000 addd #0x658b ; add a constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4001 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	4002 std FPA0+2 ; save in result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4003 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	4004 adcb #0xb0 ; add upper bytes of constant
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4005 adca #5
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4006 std RVSEED+1 ; save as new seed
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4007 std FPA0 ; save as result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4008 clr FP0SGN ; set result to positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4009 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	4010 sta FP0EXP
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4011 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	4012 sta FPSBYT ; save as extra precision
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4013 jmp LBA1C ; go normalize FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4014 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	4015 ; SIN function
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4016 SIN jsr LBC5F ; copy FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4017 ldx #LBFBD ; point to 2*pi
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4018 ldb FP1SGN ; get sign of FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4019 jsr LBB89 ; divide FPA0 by 2*pi
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4020 jsr LBC5F ; copy FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4021 bsr LBF38 ; convert FPA0 to an integer
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4022 clr RESSGN ; set result to positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4023 lda FP1EXP ; get exponent of FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4024 ldb FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4025 jsr LB9BC ; subtract FPA0 from FPA1
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4026 ldx #LBFC2 ; point to FP 0.25
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4027 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	4028 lda FP0SGN ; get result sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4029 pshs a ; save it
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4030 bpl LBFA6 ; brif positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4031 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	4032 lda FP0SGN ; get sign of result
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4033 bmi LBFA9 ; brif negative
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4034 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	4035 LBFA6 jsr LBEE9 ; flip sign of FPA0
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4036 LBFA9 ldx #LBFC2 ; point to 0.25
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4037 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	4038 puls a ; get original sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4039 tsta ; was it positive
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4040 bpl LBFB7 ; brif so
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4041 jsr LBEE9 ; flip result sign
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4042 LBFB7 ldx #LBFC7 ; point to series coefficients
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4043 jmp LBEF0 ; go calculate value
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4044 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	4045 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	4046 ; modified taylor series SIN coefficients
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4047 LBFC7 fcb 6-1 ; six coefficients
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4048 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	4049 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	4050 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	4051 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	4052 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	4053 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	4054 ; these 12 bytes are unused
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4055 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	4056 fcb 0x89,0xcd,0xa6,0x81
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4057 ; 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	4058 fdb SW3VEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4059 fdb SW2VEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4060 fdb FRQVEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4061 fdb IRQVEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4062 fdb SWIVEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4063 fdb NMIVEC
605ff82c4618 Initial check in with cleaned up sources William Astle <lost@l-w.ca> parents: diff changeset	4064 fdb RESVEC

Mercurial > hg > index.cgi

annotate bas10.s @ 1:704b2c9dc19e default tip