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Initial check in with cleaned up sources This is the initial check in the source code in a state where it builds byte accurate copies of all the various ROM versions included.
author William Astle <lost@l-w.ca>
date Sat, 08 Dec 2018 19:57:01 -0700
parents
children
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605ff82c4618 Initial check in with cleaned up sources
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1 *pragma nolist
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2 include defs.s
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3 *pragma list
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4 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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5 ; COLOR BASIC ROM
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6 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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7 org BASIC
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8 ; This is the official set of ROM entry points. It is unfortunate that the generic input ("console in") routine is not exposed
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9 ; here. It is also unfortunate that no open and close file routines are exposed. This and other oversignts led to a lot of
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10 ; software either having to re-invent the wheel or calling directly into the ROM instead of via these official entry points.
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11 POLCAT fdb KEYIN ; indirect jump, get a keystroke
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12 CHROUT fdb PUTCHR ; indirect jump, output character
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13 CSRDON fdb CASON ; indirect jump, turn cassette on and start reading
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14 BLKIN fdb GETBLK ; indirect jump, read a block from tape
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15 BLKOUT fdb SNDBLK ; indirect jump, write a block to tape
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16 JOYIN fdb GETJOY ; indirect jump, read joystick axes
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17 WRTLDR fdb WRLDR ; indirect jump, turn cassette on and write a leader
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18 ; Initialization code.
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19 LA00E lds #LINBUF+LBUFMX+1 ; put the stack in the line input buffer which is a safe place for now
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20 lda #0x37 ; enable the cartidge interrupt (to detect autostarting cartridges)
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21 sta PIA1+3
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22 lda RSTFLG ; get warm start flag
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23 cmpa #0x55 ; is it valid?
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24 bne BACDST ; brif not - cold start
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25 ldx RSTVEC ; get warm start routine pointer
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26 lda ,x ; get first byte of the routine
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27 cmpa #0x12 ; is it NOP?
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28 bne BACDST ; brif not - the routine is invalid so do a cold start
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29 jmp ,x ; transfer control to the warm start routine
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30 ; RESET/power on comes here
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31 RESVEC leay LA00E,pcr ; point to warm start check code
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32 LA02A ldx #PIA1 ; point to PIA1 - we're going to rely on the mirroring to reach PIA0
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33 clr -3,x ; set PIA0 DA to direction mode
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34 clr -1,x ; set PIA0 DB to direction mode
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35 clr -4,x ; set PIA0 DA to inputs
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36 ldd #0xff34
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37 sta -2,x ; set PIA0 DB to outputs
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38 stb -3,x ; set PIA0 DA to data mode
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39 stb -1,x ; set PIA0 DB to data mode
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40 clr 1,x ; set PIA1 DA to direction mode
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41 clr 3,x ; set PIA1 DB to direction mode
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42 deca
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43 sta ,x ; set PIA1 DA bits 7-1 as output, 0 as input
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44 lda #0xf8 ; set PIA1 DB bits 7-3 as output, 2-0 as input
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45 sta 2,x
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46 stb 1,x ; set PIA1 DA to data mode
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47 stb 3,x ; set PIA1 DB to data mode
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48 clr 2,x ; set VDG to alpha-numeric
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49 ldb #2 ; make RS232 marking ("stop" bit)
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50 stb ,x
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51 ldu #SAMREG ; point to SAM register
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52 ldb #16 ; 16 bits to clear
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53 LA056 sta ,u++ ; clear a bit
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54 decb ; done all?
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55 bne LA056 ; brif not
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56 sta SAMREG+9 ; put display at 0x400
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57 tfr b,dp ; set direct page to 0
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58 ldb #4 ; use as a mask to check RAMSZ input
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59 sta -2,x ; set RAMSZ strobe high
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60 bitb 2,x ; check RAMSZ input
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61 beq LA072 ; brif set for 4K RAMs
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62 clr -2,x ; set strobe low
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63 bitb 2,x ; check input
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64 beq LA070 ; brif set for 64K rams
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65 leau -2,u ; adjust pointer to set SAM for 16K RAMs
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66 LA070 sta -3,u ; program SAM for either 16K or 64K RAMs
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67 LA072 jmp ,y ; transfer control to startup routine
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68 ; Cold start jumps here
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69 BACDST ldx #VIDRAM+1 ; point past the top of the first 1K of memory (for double predec below)
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70 LA077 clr ,--x ; clear a byte (last will actually try clearing LSB of RESET vector in ROM)
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71 leax 1,x ; move forward one byte (will set Z if we're done)
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72 bne LA077 ; brif not donw yet
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73 jsr LA928 ; clear the screen
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74 clr ,x+ ; put the constant zero that lives before the program
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75 stx TXTTAB ; set beginning of program storage
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76 LA084 lda 2,x ; get value from memory
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77 coma ; make it different
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78 sta 2,x ; try putting different into memory
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79 cmpa 2,x ; did it matcH?
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80 bne LA093 ; brif not - we found the end of memory
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81 leax 1,x ; move pointer forward
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82 com 1,x ; restore the original memory contents
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83 bra LA084 ; try another byte
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84 LA093 stx TOPRAM ; save top of memory (one below actual top because we need a byte for VAL() to work)
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85 stx MEMSIZ ; save top of string space
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86 stx STRTAB ; set bottom of allocated string space
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87 leax -200,x ; allocate 200 bytes of string space
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88 stx FRETOP ; set top of actually free memory
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89 tfr x,s ; put the stack there
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90 ldx #LA10D ; point to variable initializer
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91 ldu #CMPMID ; point to variables to initialize (first batch)
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92 ldb #28 ; 28 bytes in first batch
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93 jsr LA59A ; copy bytes to variables
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94 ldu #IRQVEC ; point to variables to initialize (second batch)
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95 ldb #30 ; 30 bytes this time
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96 jsr LA59A ; copy bytes to variables
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97 ldx -12,x ; get SN error address
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98 stx 3,u ; set ECB's command handlers to error
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99 stx 8,u
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100 ldx #RVEC0 ; point to RAM vectors
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101 ldd #0x394b ; write 75 RTS opcodes (25 RAM vectors)
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102 LA0C0 sta ,x+ ; put an RTS
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103 decb ; done?
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104 bne LA0C0 ; brif not
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105 sta LINHDR-1 ; make temporary line header data for line encoding have a nonzero next line pointer
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106 jsr LAD19 ; do a "NEW"
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107 ldx #'E*256+'X ; magic number to detect ECB ROM
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108 cmpx EXBAS ; is there an ECB ROM?
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109 lbeq EXBAS+2 ; brif so - launch it
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110 andcc #0xaf ; start interrupts
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111 ldx #LA147-1 ; point to sign on message
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112 jsr LB99C ; print it out
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113 ldx #BAWMST ; warm start routine address
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114 stx RSTVEC ; set vector there
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115 lda #0x55 ; warm start valid flag
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116 sta RSTFLG ; mark warm start valid
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117 bra LA0F3 ; go to direct mode
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118 ; Warm start entry point
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119 BAWMST nop ; valid routine marker
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120 clr DEVNUM ; reset output/input to screen
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121 jsr LAD33 ; do a partial NEW
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122 andcc #0xaf ; start interrupts
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123 jsr LA928 ; clear the screen
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124 LA0F3 jmp LAC73 ; go to direct mode
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125 ; FIRQ service routine - this handles starting autostart cartridges
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126 BFRQSV tst PIA1+3 ; is it the cartridge interrupt?
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127 bmi LA0FC ; brif so
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128 rti
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129 LA0FC jsr LA7D1 ; delay for a while
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130 jsr LA7D1 ; delay for another while
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131 leay <LA108,pcr ; point to cartridge starter
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132 jmp LA02A ; go initialize everything clean for the cartridge
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133 LA108 clr RSTFLG ; force a cold start a cartridge reset
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134 jmp ROMPAK ; transfer control to the cartridge
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135 ; Variable initializers (first batch)
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136 LA10D fcb 18 ; mid band partition of the 1200/2400 Hz period
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137 fcb 24 ; upper limit of 1200 Hz period
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138 fcb 10 ; upper limit of 2400 Hz period
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139 fdb 128 ; number of 0x55s for cassette leader
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140 fcb 11 ; cursor blink delay
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141 fdb 87 ; 600 baud delay constant
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142 fdb 1 ; printer carriage return delay constant
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143 fcb 16 ; printer tab field width
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144 fcb 112 ; last printer tab zone
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145 fcb 132 ; printer carriage width
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146 fcb 0 ; printer carriage position
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147 fdb LB44A ; default execution address for EXEC
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148 inc CHARAD+1 ;* character fetching routines (DP portion) - we first do a two
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diff changeset
149 bne LA123 ;* two stage increment of CHARAD then load the value into A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
150 inc CHARAD ;* before transferring control to the bottom half routine in ROM
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
151 LA123 lda >0 ; NOTE: the 0 is a placeholder, extended addressing is required
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
152 jmp BROMHK
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
153 ; Variable initializers (second batch)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
154 jmp BIRQSV ; IRQ handler
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
155 jmp BFRQSV ; FIRQ handler
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
156 jmp LB44A ; default USR() address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
157 fcb 0x80,0x4f,0xc7,0x52,0x59 ; random seed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
158 fcb 0xff ; capslock flag - default to upper case
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
159 fdb DEBDEL ; keyboard debounce delay (why is it a variable?)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
160 jmp LB277 ; exponentiation handler vector
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
161 fcb 53 ; (command interpretation table) 53 commands
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
162 fdb LAA66 ; (command interpretation table) reserved words list (commands)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
163 fdb LAB67 ; (command interpretation table) jump table (commands)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
164 fcb 20 ; (command interpretation table) 20 functions
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
165 fdb LAB1A ; (command interpretation table) reserved words list (functions)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
166 fdb LAA29 ; (command interpretation table) jump table (functions)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
167 ; This is the signon message.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
168 LA147 fcc 'COLOR BASIC 1.1'
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
169 fcb 0x0d
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
170 fcc '(C) 1980 TANDY'
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
171 fcb 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
172 ; This is the "invalid colour" CLS easter egg text. Basically 11 wasted bytes
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
173 LA166 fcc 'MICROSOFT'
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
174 fcb 0x0d,0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
175 ; Read a character from current device and mask off bit 7 (keep it as 7 bit ASCII)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
176 LA171 bsr LA176 ; get character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
177 anda #0x7f ; mask off high bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
178 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
179 ; Generic read routine. Reads a character from the device specified by DEVNUM. If no input was available,
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
180 ; CINBFL will bet nonzero (on EOF). If input was available, CINBFL will be zero. Note that this routine
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
181 ; has undefined results when called on an output only device. All registers except CC and A are preserved.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
182 LA176 jsr RVEC4 ; do RAM hook
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
183 clr CINBFL ; flag data available
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
184 tst DEVNUM ; is it keyboard?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
185 beq LA1B1 ; brif so - blink cursor and wait for key press
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
186 tst CINCTR ; is there anything in cassette input buffer?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
187 bne LA186 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
188 com CINBFL ; flag EOF
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
189 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
190 ; Read character from cassette file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
191 LA186 pshs u,y,x,b ; preserve registers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
192 ldx CINPTR ; get input buffer pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
193 lda ,x+ ; get character from buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
194 pshs a ; save it for return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
195 stx CINPTR ; save new input buffer pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
196 dec CINCTR ; count character just consumed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
197 bne LA197 ; brif buffer is not empty yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
198 jsr LA635 ; go read another block, if any, to refill the buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
199 LA197 puls a,b,x,y,u,pc ; restore registers and return the character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
200 ; Blink the cursor. This might be better timed via an interrupt or something.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
201 LA199 dec BLKCNT ; is it time to blink the cursor?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
202 bne LA1AB ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
203 ldb #11 ; reset blink timer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
204 stb BLKCNT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
205 ldx CURPOS ; get cursor position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
206 lda ,x ; get character at the cursor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
207 adda #0x10 ; move to next color
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
208 ora #0x8f ; make sure it's a grahpics block with all elements lit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
209 sta ,x ; put new cursor block on screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
210 LA1AB ldx #DEBDEL ; we'll use the debounce delay for the cursor blink timer (10ms)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
211 LA1AE jmp LA7D3 ; go count X down
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
212 ; Blink cursor while waiting for a key press
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
213 LA1B1 pshs x,b ; save registers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
214 LA1B3 bsr LA199 ; go do a cursor iteration
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
215 bsr KEYIN ; go read a key
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
216 beq LA1B3 ; brif no key pressed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
217 ldb #0x60 ; VDG screen space character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
218 stb [CURPOS] ; blank cursor out
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
219 LA1BF puls b,x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
220 ; This is the actual keyboard polling routine. Returns 0 if no new key is down. Updated compared to 1.0 to reject
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
221 ; joystick buttons.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
222 KEYIN pshs u,x,b ; save registers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
223 bsr LA1C8 ; get keystroke
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
224 tsta ; set flags
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
225 puls b,x,u,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
226 LA1C8 ldu #PIA0 ; point to keyboard PIA
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
227 ldx #KEYBUF ; point to state table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
228 clra ; clear carry and set column strobe and counter to 0xff
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
229 deca
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
230 pshs x,a ; save colomn counter and a couple of holes for temporaries
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
231 sta 2,u ; initialize the column strobe to no columns active
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
232 skip1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
233 LA1D5 comb ; set carry flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
234 rol 2,u ; move to nextcolumn
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
235 bcc LA1BF ; brif we've done the last one
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
236 inc 0,s ; bump column count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
237 bsr LA239 ; read keyboard row data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
238 sta 1,s ; save key data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
239 eora ,x ; set any bit where a key state changed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
240 anda ,x ; ignore any where a key was released
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
241 ldb 1,s ; get new key data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
242 stb ,x+ ; save in state table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
243 tsta ; was a key down?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
244 beq LA1D5 ; brif not - check another
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
245 ldb 2,u ; get column strobe data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
246 stb 2,s ; save it for later
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
247 ldb #0xf8 ; make sure B is 0 after first ADDB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
248 LA1F1 addb #8 ; adjust to next row
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
249 lsra ; are we at the right row base?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
250 bcc LA1F1 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
251 addb 0,s ; add in column number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
252 beq LA244 ; brif it was @
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
253 cmpb #26 ; letter?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
254 bhi LA246 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
255 orb #0x40 ; add in upper case ASCII bias
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
256 bsr LA22E ; check for shift key
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
257 beq LA20B ; brif shift down
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
258 lda CASFLG ; check casplock
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
259 bne LA20B ; brif not caps mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
260 orb #0x20 ; convert to lower case
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
261 LA20B stb 0,s ; temp store ASCII value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
262 ldx DEBVAL ; get debounce dely counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
263 jsr LA7D3 ; wait while we count X down
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
264 ldb #0xff ; set column strobe to no columns
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
265 bsr LA237 ; read keyboard data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
266 inca ; do we have anything reading?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
267 bne LA220 ; brif so - reject keyboard read
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
268 LA21A ldb 2,s ; get saved column strobe
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
269 bsr LA237 ; read the keyboard data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
270 cmpa 1,s ; does it match the result before the delay?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
271 LA220 puls a ; get back return value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
272 bne LA22B ; brif we have a non-match or joystick button
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
273 cmpa #0x12 ; SHIFT-0?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
274 bne LA22C ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
275 com CASFLG ; swap capslock state
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
276 LA22B clra ; set Z and return zero for no key down
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
277 LA22C puls x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
278 LA22E lda #0x7f ; column strobe for SHIFT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
279 sta 2,u ; strobe keyboard
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
280 lda ,u ; get row data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
281 anda #0x40 ; only keep shift state
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
282 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
283 LA237 stb 2,u ; save requested column strobe
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
284 LA239 lda ,u ; read row data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
285 ora #0x80 ; mask joystick comparator input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
286 tst 2,u ; are we reading column 7?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
287 bmi LA243 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
288 ora #0xc0 ; also mask off the SHIFT key
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
289 LA243 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
290 LA244 ldb #51 ; scan code for @
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
291 LA246 ldx #CONTAB-0x36 ; point to first batch in control code list
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
292 cmpb #33 ; arrows, space, zero?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
293 blo LA263 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
294 ldx #CONTAB-0x54 ; point to second batch in control code list
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
295 cmpb #48 ; ENTER, CLEAR, BREAK, @?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
296 bhs LA263 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
297 bsr LA22E ; get shift status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
298 cmpb #43 ; number, colon, semicolon?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
299 bls LA25C ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
300 eora #0x40 ; invert shift sense if so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
301 LA25C tsta ; test shift status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
302 beq LA20B ; brif shift down - we have the code so check for debounce
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
303 addb #0x10 ; add in ASCII offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
304 bra LA20B ; check for debounce
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
305 LA263 aslb ; two entries for table entry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
306 bsr LA22E ; get shift status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
307 bne LA269 ; brif not down
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
308 incb ; move to shifted code entry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
309 LA269 ldb b,x ; get ASCII code
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
310 bra LA20B ; go check for debounce
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
311 fcb 0 ; unused in Color Basic 1.0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
312 CONTAB fcb 0x5e,0x5f ; <UP> (^, _)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
313 fcb 0x0a,0x5b ; <DOWN> (LF, [)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
314 fcb 0x08,0x15 ; <LEFT> (BS, ^U)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
315 fcb 0x09,0x5d ; <RIGHT> (TAB, ])
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
316 fcb 0x20,0x20 ; <SPACE>
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
317 fcb 0x30,0x12 ; <0> (0, ^R)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
318 fcb 0x0d,0x0d ; <ENTER> (CR, CR)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
319 fcb 0x0c,0x5c ; <CLEAR> (FF, \)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
320 fcb 0x03,0x03 ; <BREAK> (^C, ^C)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
321 fcb 0x40,0x13 ; <@> (@, ^S)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
322 ; Generic output routine.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
323 ; Output character in A to the device specified by DEVNUM. All registers are preserved except CC.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
324 ; Sending output to a device that does not support output is undefined.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
325 PUTCHR jsr RVEC3 ; call RAM hook
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
326 pshs b ; save B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
327 ldb DEVNUM ; get desired device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
328 incb ; set flags (Z for -1, etc.)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
329 puls b ; restore B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
330 bmi LA2BF ; brif < -1 (line printer)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
331 bne LA30A ; brif > -1 (screen)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
332 ; Write character to tape file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
333 pshs x,b,a ; save registers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
334 ldb FILSTA ; get file status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
335 decb ; input file?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
336 beq LA2A6 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
337 ldb CINCTR ; get character count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
338 incb ; account for this character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
339 bne LA29E ; brif buffer not full
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
340 bsr LA2A8 ; write previously full block to tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
341 LA29E ldx CINPTR ; get output buffer pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
342 sta ,x+ ; put character in output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
343 stx CINPTR ; save new buffer pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
344 inc CINCTR ; account for this character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
345 LA2A6 puls a,b,x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
346 ; Write a block of data to tape.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
347 LA2A8 ldb #1 ; data block type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
348 LA2AA stb BLKTYP ; set block type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
349 ldx #CASBUF ; point to output buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
350 stx CBUFAD ; set buffer pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
351 ldb CINCTR ; get number of bytes in the block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
352 stb BLKLEN ; set length to write
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
353 pshs u,y,a ; save registers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
354 jsr LA7E5 ; write a block to tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
355 puls a,y,u ; restore registers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
356 jmp LA650 ; reset buffer pointers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
357 LA2BF pshs x,b,a,cc ; save registers and interrupt status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
358 orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
359 bsr LA2FB ; set output to marking
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
360 clrb ; transmit a start bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
361 bsr LA2FD
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
362 ldb #8 ; send 8 bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
363 LA2CA pshs b ; save bit counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
364 clrb ; set output to
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
365 lsra ; get output bit to C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
366 rolb ; get it to the correct bit position for output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
367 aslb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
368 bsr LA2FD ; send the bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
369 puls b ; get back bit counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
370 decb ; sent all 8 bits?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
371 bne LA2CA ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
372 bsr LA2FB ; send stop bit (B is 0)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
373 puls cc,a ; restore interrupts and output character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
374 cmpa #0x0d ; carriage return?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
375 beq LA2E7 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
376 inc LPTPOS ; bump printer position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
377 ldb LPTPOS ; get current printer position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
378 cmpb LPTWID ; end of line?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
379 blo LA2ED ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
380 LA2E7 clr LPTPOS ; reset to start of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
381 bsr LA305 ; delay for carriage return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
382 bsr LA305
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
383 LA2ED ldb PIA1+2 ; get rs232 status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
384 lsrb ; is it "read"?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
385 bcs LA2ED ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
386 puls b,x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
387 fdb 0,0,0 ; unused space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
388 LA2FB ldb #2 ; set output to high (marking)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
389 LA2FD stb PIA1 ; set RS232 output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
390 bsr LA302 ; do baud delay (first iteration) then fall through for second
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
391 LA302 ldx LPTBTD ; get buard rate delay constant
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
392 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
393 LA305 ldx LPTLND ; get carriage return delay constant
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
394 jmp LA7D3 ; count X down
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
395 ; Output character to screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
396 LA30A pshs x,b,a ; save registers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
397 ldx CURPOS ; get cursor pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
398 cmpa #0x08 ; backspace?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
399 bne LA31D ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
400 cmpx #VIDRAM ; at top of screen?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
401 beq LA35D ; brif so - it's a no-op
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
402 lda #0x60 ; VDG space character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
403 sta ,-x ; put a space at previous location and move pointer back
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
404 bra LA344 ; save new cursor position and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
405 LA31D cmpa #0x0d ; carriage return?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
406 bne LA32F ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
407 ldx CURPOS ; get cursor pointer (why? we already have it)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
408 LA323 lda #0x60 ; VDG space character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
409 sta ,x+ ; put output space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
410 tfr x,d ; see if we at a multiple of 32 now
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
411 bitb #0x1f
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
412 bne LA323 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
413 bra LA344 ; go check for scrolling
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
414 LA32F cmpa #0x20 ; control character?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
415 blo LA35D ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
416 tsta ; is it graphics block?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
417 bmi LA342 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
418 cmpa #0x40 ; number or special?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
419 blo LA340 ; brif so (flip "case" bit)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
420 cmpa #0x60 ; upper case alpha?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
421 blo LA342 ; brif so - keep it unmodified
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
422 anda #0xdf ; clear bit 5 (inverse video)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
423 LA340 eora #0x40 ; flip inverse video bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
424 LA342 sta ,x+ ; output character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
425 LA344 stx CURPOS ; save new cursor position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
426 cmpx #VIDRAM+511 ; end of screen?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
427 bls LA35D ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
428 ldx #VIDRAM ; point to start of screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
429 LA34E ldd 32,x ; get two characters from next row
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
430 std ,x++ ; put them on this row
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
431 cmpx #VIDRAM+0x1e0 ; at start of last row on screen?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
432 blo LA34E ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
433 ldb #0x60 ; VDG space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
434 jsr LA92D ; blank out last line (borrow CLS's loop)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
435 LA35D puls a,b,x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
436 ; Set up device parameters for output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
437 LA35F jsr RVEC2 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
438 pshs x,b,a ; save registers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
439 clr PRTDEV ; flag device as a screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
440 lda DEVNUM ; get devicenumber
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
441 beq LA373 ; brif screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
442 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
443 beq LA384 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
444 ldx LPTCFW ; get tab width and last tab stop for printer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
445 ldd LPTWID ; get line width and current position for printer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
446 bra LA37C ; set parameters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
447 LA373 ldb CURPOS+1 ; get LSB of cursor position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
448 andb #0x1f ; now we have the offset into the line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
449 ldx #0x1010 ; 16 character tab, position 16 is last tab stop
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
450 lda #32 ; screen is 32 characters wide
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
451 LA37C stx DEVCFW ; save tab width and last tab stop for active device
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
452 stb DEVPOS ; save line position for current device
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
453 sta DEVWID ; save line width for current device
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
454 puls a,b,x,pc ; restore registers and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
455 LA384 com PRTDEV ; flag device as non-display
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
456 ldx #0x0100 ; tab width is 1, last tab field is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
457 clra ; line width is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
458 clrb ; character position on line is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
459 bra LA37C ; go set parameters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
460 ; This is the line input routine used for reading lines for Basic, both in immediate mode and for
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
461 ; INPUT and LINE INPUT. Exit with C set if terminated by BREAK and C clear if terminated by ENTER.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
462 ; The actualy entry point is LA390. Note that this routine echoes to *all* devices.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
463 LA38D jsr LA928 ; clear screen (CLEAR key handling)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
464 LA390 jsr RVEC12 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
465 clr IKEYIM ; reset cached input character from BREAK check
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
466 ldx #LINBUF+1 ; point to line input buffer (input pointer)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
467 ldb #1 ; Number of characters in line (we start at 1 so BS handling is easier)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
468 LA39A jsr LA171 ; get an input character, only keep low 7 bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
469 tst CINBFL ; is it EOF?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
470 bne LA3CC ; brif EOF
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
471 tst DEVNUM ; is it keyboard input?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
472 bne LA3C8 ; brif not - don't do line editing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
473 cmpa #0x0c ; form feed (CLEAR)?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
474 beq LA38D ; brif so - clear screen and reset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
475 cmpa #0x08 ; backspace?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
476 bne LA3B4 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
477 decb ; move back one character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
478 beq LA390 ; brif we were at the start of the line - reset and start again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
479 leax -1,x ; move input pointer back
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
480 bra LA3E8 ; echo the backspace and continue
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
481 LA3B4 cmpa #0x15 ; SHIFT-LEFT (kill line)?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
482 bne LA3C2 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
483 LA3B8 decb ; at start of line?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
484 beq LA390 ; brif so - reset and restart
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
485 lda #0x08 ; echo a backspace
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
486 jsr PUTCHR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
487 bra LA3B8 ; see if we've erased everything yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
488 LA3C2 cmpa #0x03 ; BREAK?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
489 orcc #1 ; set C if it is (only need Z for the next test
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
490 beq LA3CD ; brif BREAK - exit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
491 LA3C8 cmpa #0x0d ; ENTER (CR)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
492 bne LA3D9 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
493 LA3CC clra ; clear carry (it might not be clear on EOF)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
494 LA3CD pshs cc ; save ENTER/BREAK flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
495 jsr LB958 ; echo a carriage return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
496 clr ,x ; make sure we have a NUL at the end of the buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
497 ldx #LINBUF ; point to input buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
498 puls cc,pc ; restore ENTER/BREAK flag and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
499 LA3D9 cmpa #0x20 ; control character?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
500 blo LA39A ; brif so - skip it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
501 cmpa #'z+1 ; above z?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
502 bhs LA39A ; brif so - ignore it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
503 cmpb #LBUFMX ; is the buffer full?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
504 bhs LA39A ; brif so - ignore extra characters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
505 sta ,x+ ; put character in the buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
506 incb ; bump character count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
507 LA3E8 jsr PUTCHR ; echo character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
508 bra LA39A ; go handle next input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
509 ; Check if DEVNUM Is valid for reading. Raise FM error if open but not for reading. NO error if not open.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
510 LA3ED jsr RVEC5 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
511 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
512 beq LA415 ; brif keyboard - always valid
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
513 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
514 bne LA403 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
515 lda FILSTA ; get tape file status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
516 bne LA400 ; brif file is open
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
517 LA3FB ldb #22*2 ; raise NO error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
518 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
519 LA400 deca ; is it in input mode?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
520 beq LA415 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
521 LA403 jmp LA616 ; raise FM error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
522 ; Check if DEVNUM is valid for writing. Raise FM error if open but not for writing. NO error if not open.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
523 LA406 jsr RVEC6 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
524 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
525 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
526 bne LA415 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
527 lda FILSTA ; get file status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
528 beq LA3FB ; brif not open
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
529 deca ; is it open for reading?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
530 beq LA403 ; brif so - bad mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
531 LA415 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
532 ; CLOSE command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
533 CLOSE beq LA426 ; brif no file specified - close all files
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
534 jsr LA5A5 ; parse device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
535 LA41B bsr LA42D ; close specified file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
536 jsr GETCCH ; is there more?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
537 beq LA44B ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
538 jsr LA5A2 ; check for comma and parse another device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
539 bra LA41B ; go close this one
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
540 ; Close all files handler.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
541 LA426 jsr RVEC7 ; Yup. The RAM hook dance.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
542 lda #-1 ; start with tape file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
543 sta DEVNUM
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
544 ; Close file specified in DEVNUM. Note that this never fails.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
545 LA42D jsr RVEC8 ; You know it. RAM hook.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
546 lda DEVNUM ; get device we're closing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
547 clr DEVNUM ; reset to screen/keyboard
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
548 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
549 bne LA44B ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
550 lda FILSTA ; get file status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
551 cmpa #2 ; is it output?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
552 bne LA449 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
553 lda CINCTR ; is there anything waiting to be written?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
554 beq LA444 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
555 jsr LA2A8 ; write final block of data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
556 LA444 ldb #0xff ; write EOF block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
557 jsr LA2AA
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
558 LA449 clr FILSTA ; mark tape file closed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
559 LA44B rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
560 ; CSAVE command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
561 CSAVE jsr LA578 ; parse filename
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
562 jsr GETCCH ; see what we have after the file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
563 beq LA469 ; brif none
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
564 jsr LB26D ; make sure there's a comma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
565 ldb #'A ; make sure there's an A after
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
566 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
567 bne LA44B ; brif not end of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
568 clra ; file type 0 (basic program)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
569 jsr LA65C ; write out header block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
570 lda #-1 ; set output to tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
571 sta DEVNUM
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
572 clra ; set Z so we list the whole program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
573 jmp LIST ; go list the program to tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
574 LA469 clra ; file type 0 (basic program)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
575 ldx ZERO ; set to binary file mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
576 jsr LA65F ; write header block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
577 clr FILSTA ; close files
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
578 inc BLKTYP ; set block type to data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
579 jsr WRLDR ; write out a leader
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
580 ldx TXTTAB ; point to start of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
581 LA478 stx CBUFAD ; set buffer location
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
582 lda #255 ; block size to 255 bytes (max size)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
583 sta BLKLEN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
584 ldd VARTAB ; get end of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
585 subd CBUFAD ; how much is left?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
586 beq LA491 ; brif we have nothing left
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
587 cmpd #255 ; do we have a full block worth?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
588 bhs LA48C ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
589 stb BLKLEN ; save actual remainder as block length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
590 LA48C jsr SNDBLK ; write a block out
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
591 bra LA478 ; go do another block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
592 LA491 neg BLKTYP ; set block type to 0xff (EOF)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
593 clr BLKLEN ; no data in EOF block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
594 jmp LA7E7 ; write EOF, stop tape, and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
595 ; CLOAD and CLOADM commands
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
596 CLOAD clr FILSTA ; close tape file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
597 cmpa #'M ; is it ClOADM?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
598 beq LA4FE ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
599 leas 2,s ; clean up stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
600 jsr LA5C5 ; parse file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
601 jsr LA648 ; go find the file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
602 tst CASBUF+10 ; is it binary?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
603 beq LA4C8 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
604 lda CASBUF+9 ; is it ASCII?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
605 beq LA4CD ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
606 jsr LAD19 ; clear out existing program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
607 lda #-1 ; set up for reading from tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
608 sta DEVNUM
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
609 inc FILSTA ; set tape file to input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
610 jsr LA635 ; go read first block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
611 jmp LAC7C ; go to immediate mode to read in the program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
612 ; This is the EOF handler for immediate mode. It's rather assinine for this to be located here. It is
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
613 ; probably an artifact of a substantially different code layout prior to compacting the ROM to fit in
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
614 ; 8K.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
615 LA4BF jsr RVEC13 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
616 jsr LA42D ; close file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
617 jmp LAC73 ; go back to immediate mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
618 LA4C8 lda CASBUF+8 ; get file type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
619 beq LA4D0 ; brif basic program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
620 LA4CD jmp LA616 ; raise FM error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
621 LA4D0 jsr LAD19 ; erase existing program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
622 jsr CASON ; start reading tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
623 ldx TXTTAB ; get start of program storage
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
624 LA4D8 stx CBUFAD ; set load address for block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
625 ldd CBUFAD ; get start of block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
626 inca ; bump by 256
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
627 jsr LAC37 ; check if there's room for a maximum sized block of 255
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
628 jsr GETBLK ; go read a block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
629 bne LA4F8 ; brif there was an error during reading
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
630 lda BLKTYP ; get type of block read
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
631 beq LA4F8 ; brif header block - IO error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
632 bpl LA4D8 ; brif data block - read another
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
633 stx VARTAB ; save new end of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
634 bsr LA53B ; stop tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
635 ldx #LABED-1 ; point to "OK" prompt
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
636 jsr LB99C ; show prompt
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
637 jmp LACE9 ; reset various things and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
638 LA4F8 jsr LAD19 ; clear out partial program load
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
639 LA4FB jmp LA619 ; raise IO error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
640 ; This is the CLOADM command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
641 LA4FE jsr GETNCH ; eat the "M"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
642 bsr LA578 ; parse file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
643 jsr LA648 ; go find the file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
644 LA505 ldx ZERO ; default offset is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
645 jsr GETCCH ; see if there's something after the file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
646 beq LA511 ; brif no offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
647 jsr LB26D ; make sure there's a comma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
648 jsr LB73D ; evaluate offset to X
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
649 LA511 lda CASBUF+8 ; get file mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
650 cmpa #2 ; M/L program?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
651 bne LA4CD ; brif not - FM error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
652 ldd CASBUF+11 ; get load address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
653 leau D,x ; add in offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
654 stu EXECJP ; set EXEC default address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
655 tst CASBUF+10 ; is it binary?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
656 bne LA4CD ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
657 ldd CASBUF+13 ; get load address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
658 leax d,x ; add in offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
659 stx CBUFAD ; set buffer address for loading
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
660 jsr CASON ; start up tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
661 LA52E jsr GETBLK ; read a block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
662 bne LA4FB ; brif error reading
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
663 stx CBUFAD ; save new load address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
664 tst BLKTYP ; set flags on block type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
665 beq LA4FB ; brif another header - IO error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
666 bpl LA52E ; brif it was data - read more
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
667 LA53B jmp LA7E9 ; turn off tape and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
668 ; The EXEC command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
669 EXEC beq LA545 ; brif no argument - use default address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
670 jsr LB73D ; evaluate EXEC address to X
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
671 stx EXECJP ; set new default EXEC address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
672 LA545 jmp [EXECJP] ; transfer control to execution address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
673 ; Break check for LIST so it doesn't interrupt ASCII saves. Why is this here instead of with the rest of the break
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
674 ; check logic or packaged up with LIST?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
675 LA549 jsr RVEC11 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
676 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
677 inca ; is it tape?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
678 beq LA5A1 ; brif so - don't do break check
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
679 jmp LADEB ; do the actual break check
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
680 ; Evaluate an expression and make sure it is within the limits of the screen and sets the cursor position.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
681 ; This really should be located with the PRINT command.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
682 LA554 jsr LB3E4 ; evaluate a positive expression to D
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
683 subd #511 ; is it within bounds?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
684 lbhi LB44A ; brif not - error out
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
685 addd #VIDRAM+511 ; adjust to be within the screen (and undo the SUBD above)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
686 std CURPOS ; set cursor position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
687 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
688 ; INKEY$ function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
689 INKEY lda IKEYIM ; was a key down during break check?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
690 bne LA56B ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
691 jsr KEYIN ; poll the keyboard
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
692 LA56B clr IKEYIM ; reset the break check cache
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
693 sta FPA0+3 ; store result for later return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
694 lbne LB68F ; brif a key was down - return it as a string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
695 sta STRDES ; set string length to 0 (no key down)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
696 jmp LB69B ; return the NULL string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
697 ; Parse a filename
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
698 LA578 ldx #CFNBUF ; point to file name buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
699 clr ,x+ ; zero out file name length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
700 lda #0x20 ; space character to initialize file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
701 LA57F sta ,x+ ; put a space in the buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
702 cmpx #CASBUF ; at end of file name?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
703 bne LA57F ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
704 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
705 beq LA5A1 ; brif no name present
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
706 jsr LB156 ; evaluate the file name expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
707 jsr LB654 ; point to start of the file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
708 ldu #CFNBUF ; point to file name buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
709 stb ,u+ ; save string length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
710 beq LA5A1 ; brif empty - we're done
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
711 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
712 LA598 ldb #8 ; copy 8 bytes
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
713 ; Move B bytes from (X) to (U)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
714 LA59A lda ,x+ ; copy a byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
715 sta ,u+
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
716 decb ; done yet?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
717 bne LA59A ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
718 LA5A1 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
719 ; Parse a device number and check validity
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
720 LA5A2 jsr LB26D ; check for comma and SN error if not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
721 LA5A5 cmpa #'# ; do we have a #?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
722 bne LA5AB ; brif not (it's optional)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
723 jsr GETNCH ; munch the #
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
724 LA5AB jsr LB141 ; evaluate the expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
725 LA5AE jsr INTCNV ; convert it to an integer in D
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
726 rolb ; move sign of B into C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
727 adca #0 ; add sign of B to A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
728 bne LA61F ; brif A doesn't match the sign of B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
729 rorb ; restore B (ADCA will have set C if B was negative)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
730 stb DEVNUM ; set device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
731 jsr RVEC1 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
732 beq LA5C4 ; brif device number set to screen/keyboard (valid)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
733 bpl LA61F ; brif not negative (not valid)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
734 cmpb #-2 ; is it printer or tape?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
735 blt LA61F ; brif not (not valid)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
736 LA5C4 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
737 ; Read file name from the line and do an error if anything follows it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
738 LA5C5 bsr LA578 ; parse file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
739 jsr GETCCH ; set flags on current character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
740 LA5C9 beq LA5C4 ; brif nothing there - it's good
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
741 jmp LB277 ; raise SN error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
742 ; EOF functoin
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
743 EOF jsr RVEC14 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
744 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
745 pshs a ; save it (so we can restore it later)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
746 bsr LA5AE ; check the device number (which is in FPA0)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
747 jsr LA3ED ; check validity for reading
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
748 LA5DA clrb ; not EOF = 0 (FALSE)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
749 lda DEVNUM ; get device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
750 beq LA5E4 ; brif keyboard - never EOF
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
751 tst CINCTR ; is there anything in the input buffer?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
752 bne LA5E4 ; brif so - not EOF
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
753 comb ; set EOF flag to -1 (true)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
754 LA5E4 puls a ; get back original device
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
755 sta DEVNUM ; restore it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
756 LA5E8 sex ; sign extend result to 16 bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
757 jmp GIVABF ; go return the result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
758 ; SKIPF command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
759 SKIPF bsr LA5C5 ; parse file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
760 bsr LA648 ; look for the file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
761 jsr LA6D1 ; read the file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
762 bne LA619 ; brif error reading file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
763 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
764 ; OPEN command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
765 OPEN jsr RVEC0 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
766 jsr LB156 ; get file status (input/output)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
767 jsr LB6A4 ; get first character of status string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
768 pshs b ; save status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
769 bsr LA5A2 ; parse a comma then the device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
770 jsr LB26D ; make sure there's a comma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
771 bsr LA5C5 ; parse the file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
772 lda DEVNUM ; get device number of the file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
773 clr DEVNUM ; reset actual device to the screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
774 puls b ; get back status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
775 cmpb #'I ; INPUT?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
776 beq LA624 ; brif so - open a file for INPUT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
777 cmpb #'O ; OUTPUT?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
778 beq LA658 ; brif so - open a file for OUTPUT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
779 LA616 ldb #21*2 ; raise FM error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
780 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
781 LA619 ldb #20*2 ; raise I/O error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
782 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
783 LA61C ldb #18*2 ; raise AO error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
784 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
785 LA61F ldb #19*2 ; raise DN error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
786 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
787 LA624 inca ; are we opening the tape?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
788 bmi LA616 ; brif printer - FM error; printer can't be opened for READ
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
789 bne LA657 ; brif screen - screen is always open
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
790 bsr LA648 ; read header block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
791 lda CASBUF+9 ; clear A if binary or machine language file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
792 anda CASBUF+10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
793 beq LA616 ; bad file mode if not data file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
794 inc FILSTA ; open file for input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
795 LA635 jsr LA701 ; start tape, read block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
796 bne LA619 ; brif error during read
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
797 tst BLKTYP ; check block type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
798 beq LA619 ; brif header block - something's wrong
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
799 bmi LA657 ; brif EOF
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
800 lda BLKLEN ; get length of block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
801 beq LA635 ; brif empty block - read another
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
802 LA644 sta CINCTR ; set buffer count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
803 bra LA652 ; reset buffer pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
804 LA648 tst FILSTA ; is the file open?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
805 bne LA61C ; brif so - AO error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
806 bsr LA681 ; search for file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
807 bne LA619 ; brif error on read
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
808 LA650 clr CINCTR ; mark buffer empty
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
809 LA652 ldx #CASBUF ; set buffer pointer to start of buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
810 stx CINPTR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
811 LA657 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
812 LA658 inca ; check for tape device
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
813 bne LA657 ; brif not tape (nothing doing - it's always open)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
814 inca ; make file type 1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
815 LA65C ldx #0xffff ; ASCII and data mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
816 LA65F tst FILSTA ; is file open?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
817 bne LA61C ; brif so - raise error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
818 ldu #CASBUF ; point to tape buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
819 stu CBUFAD ; set address of block to write
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
820 sta 8,u ; set file type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
821 stx 9,u ; set ASCII flag and mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
822 ldx #CFNBUF+1 ; point to file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
823 jsr LA598 ; move file name to the tape buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
824 clr BLKTYP ; set for header block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
825 lda #15 ; 15 bytes in a header block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
826 sta BLKLEN ; set block length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
827 jsr LA7E5 ; write the block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
828 lda #2 ; set file type to output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
829 sta FILSTA
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
830 bra LA650 ; reset file pointers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
831 ; Search for correct cassette file name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
832 LA681 ldx #CASBUF ; point to cassette buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
833 stx CBUFAD ; set location to read blocks to
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
834 LA686 lda CURLIN ; are we in immediate mode?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
835 inca
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
836 bne LA696 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
837 jsr LA928 ; clear screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
838 ldx CURPOS ; get start of screen (set after clear)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
839 ldb #'S ; for "searching"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
840 stb ,x++ ; put it on the screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
841 stx CURPOS ; save cursor position to be one past the search indicator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
842 LA696 bsr LA701 ; read a block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
843 orb BLKTYP ; merge error flag with block type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
844 bne LA6D0 ; brif error or not header
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
845 ldx #CASBUF ; point to block just read
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
846 ldu #CFNBUF+1 ; point to the desired name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
847 ldb #8 ; compare 8 characters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
848 clr ,-s ; set flag to "match"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
849 LA6A6 lda ,x+ ; get character from just read block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
850 ldy CURLIN ; immediate mode?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
851 leay 1,y
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
852 bne LA6B4 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
853 clr DEVNUM ; set output to screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
854 jsr PUTCHR ; display character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
855 LA6B4 suba ,u+ ; subtract from desired file name (nonzero if no match)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
856 ora ,s ; merge with match flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
857 sta ,s ; save new match flag (will be nonzero if any character differs)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
858 decb ; done all characters?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
859 bne LA6A6 ; brif not - do another
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
860 lda ,s+ ; get match flag (and set flags)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
861 beq LA6CB ; brif we have a match
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
862 tst -9,u ; did we actually have a file name or will any file do?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
863 beq LA6CB ; brif any file will do
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
864 bsr LA6D1 ; go read past the file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
865 bne LA6D0 ; return on error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
866 bra LA686 ; keep looking
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
867 LA6CB lda #'F ; for "found"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
868 bsr LA6F8 ; put "F" on screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
869 clra ; set Z to indicat eno errors
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
870 LA6D0 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
871 LA6D1 tst CASBUF+10 ; check type of file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
872 bne LA6DF ; brif "blocked" file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
873 jsr CASON ; turn on tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
874 LA6D9 bsr GETBLK ; read a block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
875 bsr LA6E5 ; error or EOF?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
876 bra LA6D9 ; read another block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
877 LA6DF bsr LA701 ; read a single block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
878 bsr LA6E5 ; error or EOF?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
879 bra LA6DF ; read another block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
880 LA6E5 bne LA6ED ; got error reading block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
881 lda BLKTYP ; check block type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
882 nega ; A is 0 now if EOF
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
883 bmi LA700 ; brif not end of file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
884 deca ; clear error indicator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
885 LA6ED sta CSRERR ; set error flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
886 leas 2,s ; don't return to original caller
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
887 bra LA705 ; turn off motor and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
888 LA6F3 lda VIDRAM ; get first char on screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
889 eora #0x40 ; flip case
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
890 LA6F8 ldb CURLIN ; immediate mode?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
891 incb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
892 bne LA700 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
893 sta VIDRAM ; save flipped case character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
894 LA700 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
895 ; Read a single block from tape (for a "blocked" file)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
896 LA701 bsr CASON ; start tape going
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
897 bsr GETBLK ; read block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
898 LA705 jsr LA7E9 ; stop tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
899 ldb CSRERR ; get error status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
900 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
901 ; Read a block from tape - this does the heavy lifting
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
902 GETBLK orcc #0x50 ; disable interrupts (timing is important)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
903 bsr LA6F3 ; reverse video of upper left character in direct mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
904 ldx CBUFAD ; point to destination buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
905 clra ; reset read byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
906 LA712 bsr LA755 ; read a bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
907 rora ; move bit into accumulator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
908 cmpa #0x3c ; have we synched on the start of the block data yet?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
909 bne LA712 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
910 bsr LA749 ; read block type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
911 sta BLKTYP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
912 bsr LA749 ; get block size
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
913 sta BLKLEN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
914 adda BLKTYP ; accumulate checksum
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
915 sta CCKSUM ; save current checksum
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
916 lda BLKLEN ; get back count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
917 sta CSRERR ; initialize counter; we use this since it will be ovewritten later anyway
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
918 beq LA73B ; brif empty block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
919 LA72B bsr LA749 ; read a byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
920 sta ,x ; save in buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
921 cmpa ,x+ ; make sure it wrote
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
922 bne LA744 ; brif error if it didn't match
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
923 adda CCKSUM ; accumulate checksum
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
924 sta CCKSUM
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
925 dec CSRERR ; read all bytes?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
926 bne LA72B ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
927 LA73B bsr LA749 ; read checksum from tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
928 suba CCKSUM ; does it match?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
929 beq LA746 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
930 lda #1 ; checksum error flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
931 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
932 LA744 lda #2 ; non-RAM error flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
933 LA746 sta CSRERR ; save error status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
934 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
935 LA749 lda #8 ; read 8 bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
936 sta CPULWD ; initialize counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
937 LA74D bsr LA755 ; read a bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
938 rora ; put it into accumulator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
939 dec CPULWD ; got all 8 bits?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
940 bne LA74D ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
941 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
942 LA755 bsr LA75D ; get time between transitions
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
943 ldb CPERTM ; get timer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
944 decb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
945 cmpb CMPMID ; set C if timer is below the transition point - high or 1; clear otherwise
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
946 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
947 LA75D clr CPERTM ; reset timer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
948 tst CBTPHA ; check which phase we synched on
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
949 bne LA773 ; brif HI-LO synch
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
950 LA763 bsr LA76C ; read input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
951 bcs LA763 ; brif still high
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
952 LA767 bsr LA76C ; read input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
953 bcc LA767 ; brif still low
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
954 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
955 LA76C inc CPERTM ; bump timer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
956 ldb PIA1 ; get input bit to C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
957 rorb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
958 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
959 LA773 bsr LA76C ; read input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
960 bcc LA773 ; brif still low
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
961 LA777 bsr LA76C ; read output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
962 bcs LA777 ; brif still high
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
963 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
964 ; Start tape and look for sync bytes
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
965 CASON orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
966 bsr LA7CA ; turn on tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
967 clr CPULWD ; reset timer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
968 LA782 bsr LA763 ; wait for low-high transition
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
969 LA784 bsr LA7AD ; wait for it to go low again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
970 bhi LA797 ; brif in range for 1200 Hz
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
971 LA788 bsr LA7A7 ; wait for it to go high again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
972 blo LA79B ; brif in range for 2400 Hz
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
973 dec CPULWD ; decrement counter (synched on low-high)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
974 lda CPULWD ; get counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
975 cmpa #-96 ; have we seen 96 1-0-1-0 patterns (48 0x55s)?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
976 LA792 bne LA782 ; brif not - wait some more
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
977 sta CBTPHA ; save phase we synched on
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
978 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
979 LA797 bsr LA7A7 ; wait for it to go high again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
980 bhi LA784 ; brif another 1200 Hz, 2 in a row, try again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
981 LA79B bsr LA7AD ; wait for it to go low again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
982 blo LA788 ; brif another 2400 Hz; go try again for high
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
983 inc CPULWD ; bump counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
984 lda CPULWD ; get counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
985 suba #96 ; set 0 if we've seen enought 0-1-0-1 patterns (0xaa)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
986 bra LA792 ; set phase and return or keep waiting
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
987 LA7A7 clr CPERTM ; reset period timer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
988 bsr LA767 ; wait for high
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
989 bra LA7B1 ; set flags on result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
990 LA7AD clr CPERTM ; reset period timer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
991 bsr LA777 ; wait for low
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
992 LA7B1 ldb CPERTM ; get period count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
993 cmpb CMP0 ; is it too long for 1200Hz?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
994 bhi LA7BA ; brif so - reset counts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
995 cmpb CMP1 ; set C if 2400Hz, clear C if 1200 Hz
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
996 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
997 LA7BA clr CPULWD ; reset sync counter (too slow or drop out)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
998 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
999 ; MOTOR command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1000 MOTOR tfr a,b ; save ON/OFF
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1001 jsr GETNCH ; eat the ON/OFF token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1002 cmpb #0xaa ; OFF?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1003 beq LA7E9 ; brif so - turn off tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1004 cmpb #0x88 ; ON?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1005 jsr LA5C9 ; SN error if no match
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1006 ; Turn on tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1007 LA7CA lda PIA1+1 ; get motor control value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1008 ora #8 ; turn on bit 3 (starts motor)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1009 bsr LA7F0 ; put it back (dumb but it saves a byte)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1010 LA7D1 ldx ZERO ; maximum delay timer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1011 LA7D3 leax -1,x ; count down
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1012 bne LA7D3 ; brif not at 0 yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1013 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1014 ; Write a synch leader to tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1015 WRLDR orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1016 bsr LA7CA ; turn on tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1017 ldx SYNCLN ; get count of 0x55s to write
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1018 LA7DE bsr LA828 ; write a 0x55
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1019 leax -1,x ; done?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1020 bne LA7DE ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1021 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1022 ; Write sync bytes and a block, then stop tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1023 LA7E5 bsr WRLDR ; write sync
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1024 LA7E7 bsr SNDBLK ; write block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1025 ; Turn off tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1026 LA7E9 andcc #0xaf ; enable interrupts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1027 lda PIA1+1 ; get control register
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1028 anda #0xf7 ; disable motor bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1029 LA7F0 sta PIA1+1 ; set motor enable bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1030 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1031 ; Write a block to tape.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1032 SNDBLK orcc #0x50 ; disable interrupts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1033 ldb BLKLEN ; get block size
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1034 stb CSRERR ; initialize character counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1035 lda BLKLEN ; initialize checksum
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1036 beq LA805 ; brif empty block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1037 ldx CBUFAD ; point to tape buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1038 LA800 adda ,x+ ; accumulate checksum
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1039 decb ; end of block data?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1040 bne LA800 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1041 LA805 adda BLKTYP ; accumulate block type into checksum
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1042 sta CCKSUM ; save calculated checksum
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1043 ldx CBUFAD ; point to buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1044 bsr LA828 ; send a 0x55
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1045 lda #0x3c ; and then a 0x3c
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1046 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1047 lda BLKTYP ; send block type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1048 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1049 lda BLKLEN ; send block size
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1050 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1051 tsta ; empty block?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1052 beq LA824 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1053 LA81C lda ,x+ ; send character from block data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1054 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1055 dec CSRERR ; are we done yet?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1056 bne LA81C ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1057 LA824 lda CCKSUM ; send checksum
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1058 bsr LA82A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1059 LA828 lda #0x55 ; send a 0x55
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1060 LA82A pshs a ; save output byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1061 ldb #1 ; initialize bit probe
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1062 LA82E lda CLSTSN ; get ending value of last cycle
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1063 sta PIA1 ; set DA
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1064 ldy #LA85C ; point to sine wave table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1065 bitb ,s ; is bit set?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1066 bne LA848 ; brif so - do high frequency
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1067 LA83B lda ,y+ ; get next sample (use all for low frequency)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1068 cmpy #LA85C+36 ; end of table?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1069 beq LA855 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1070 sta PIA1 ; set output sample
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1071 bra LA83B ; do another sample
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1072 LA848 lda ,y++ ; get next sample (use every other for high frequency)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1073 cmpy #LA85C+36 ; end of table?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1074 beq LA855 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1075 sta PIA1 ; send output sample
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1076 bra LA848 ; do another sample
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1077 LA855 sta CLSTSN ; save last sample that *would* have been sent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1078 lslb ; shift mask to next bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1079 bcc LA82E ; brif not done all 8 bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1080 puls a,pc ; get back original character and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1081 ; This is the sample table for the tape sine wave
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1082 LA85C fcb 0x82,0x92,0xaa,0xba,0xca,0xda
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1083 fcb 0xea,0xf2,0xfa,0xfa,0xfa,0xf2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1084 fcb 0xea,0xda,0xca,0xba,0xaa,0x92
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1085 fcb 0x7a,0x6a,0x52,0x42,0x32,0x22
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1086 fcb 0x12,0x0a,0x02,0x02,0x02,0x0a
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1087 fcb 0x12,0x22,0x32,0x42,0x52,0x6a
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1088 ; SET command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1089 SET bsr LA8C1 ; get absolute screen position of graphics block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1090 pshs x ; save character location
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1091 jsr LB738 ; evaluate comma then expression in B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1092 puls x ; get back character pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1093 cmpb #8 ; valid colour?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1094 bhi LA8D5 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1095 decb ; normalize colours
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1096 bmi LA895 ; brif colour 0 (use current colour)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1097 lda #0x10 ; 16 patterns per colour
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1098 mul
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1099 bra LA89D ; go save the colour
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1100 LA895 ldb ,x ; get current value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1101 bpl LA89C ; brif not grahpic
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1102 andb #0x70 ; keep only the colour
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1103 skip1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1104 LA89C clrb ; reset block to all black
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1105 LA89D pshs b ; save colour
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1106 bsr LA90D ; force a )
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1107 lda ,x ; get current screen value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1108 bmi LA8A6 ; brif graphic block already
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1109 clra ; force all pixels off
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1110 LA8A6 anda #0x0f ; keep only pixel data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1111 ora GRBLOK ; set the desired pixel
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1112 ora ,s+ ; merge with desired colour
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1113 LA8AC ora #0x80 ; force it to be a graphic block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1114 sta ,x ; put new block on screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1115 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1116 ; RESET command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1117 RESET bsr LA8C1 ; get address of desired block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1118 bsr LA90D ; force a )
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1119 clra ; zero block (no pixels)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1120 ldb ,x ; is it graphics?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1121 bpl LA8AC ; brif not - just blank the block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1122 com GRBLOK ; invert pixel data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1123 andb GRBLOK ; turn off the desired pixel
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1124 stb ,x ; put new pixel data on screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1125 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1126 ; Parse SET/RESET/POINT coordinates except for closing )
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1127 LA8C1 jsr LB26A ; make sure it starts with (
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1128 LA8C4 jsr RVEC21 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1129 jsr LB70B ; get first coordinate
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1130 cmpb #63 ; valid horizontal coordinate
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1131 bhi LA8D5 ; brif out of range
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1132 pshs b ; save horizontal coordinate
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1133 jsr LB738 ; look for , followed by vertical coordinate
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1134 cmpb #31 ; in range for vertical?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1135 LA8D5 bhi LA948 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1136 pshs b ; save vertical coordinate
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1137 lsrb ; divide by two (two blocks per row)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1138 lda #32 ; 32 bytes per row
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1139 mul ; now we have the offset into video RAM
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1140 ldx #VIDRAM ; point to start of screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1141 leax d,x ; now X points to the correct character row
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1142 ldb 1,s ; get horizontal coordinate
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1143 lsrb ; divide by two (two per character cell)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1144 abx ; now we're pointing to the correct character cell
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1145 puls a,b ; get back coordinates (vertical in A)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1146 anda #1 ; keep only row offset of vertical
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1147 rorb ; get column offset of horizontal to C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1148 rola ; now we have "row * 2 + col" in A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1149 ldb #0x10 ; make a bit mask (one bit left of first pixel)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1150 LA8EE lsrb ; move mask right
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1151 deca ; at the right pixel?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1152 bpl LA8EE ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1153 stb GRBLOK ; save graphics block mask
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1154 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1155 ; POINT function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1156 POINT bsr LA8C4 ; evaluate coordinates
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1157 ldb #0xff ; default colour value is -1 (not graphics)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1158 lda ,x ; get character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1159 bpl LA90A ; brif not graphics
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1160 anda GRBLOK ; is desired pixel set?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1161 beq LA909 ; brif not - return 0 for "black"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1162 ldb ,x ; get graphics data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1163 lsrb ; shift right 4 to get colour in low bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1164 lsrb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1165 lsrb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1166 lsrb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1167 andb #7 ; lose the graphics block bias
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1168 LA909 incb ; shift colours into 1 to 8 range
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1169 LA90A jsr LA5E8 ; convert B to floating point
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1170 LA90D jmp LB267 ; make sure we have a ) and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1171 ; CLS command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1172 CLS jsr RVEC22 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1173 LA913 beq LA928 ; brif no colour - just do a basic screen clear
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1174 jsr LB70B ; evaluate colour number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1175 cmpb #8 ; valid colour?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1176 bhi LA937 ; brif not - do the easter egg
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1177 tstb ; color 0?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1178 beq LA925 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1179 decb ; normalize to 0 based colour numbers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1180 lda #0x10 ; 16 blocks per colour
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1181 mul ; now we have the base code for that colour
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1182 orb #0x0f ; set all pixels
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1183 LA925 orb #0x80 ; make it a graphics block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1184 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1185 LA928 ldb #0x60 ; VDG screen space character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1186 ldx #VIDRAM ; point to start of screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1187 LA92D stx CURPOS ; set cursor position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1188 LA92F stb ,x+ ; blank a character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1189 cmpx #VIDRAM+511 ; end of screen?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1190 bls LA92F ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1191 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1192 LA937 bsr LA928 ; clear te screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1193 ldx #LA166-1 ; point to the easter egg
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1194 jmp LB99C ; go display it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1195 ; Evaluate an expression to B, prefixed by a comma, and do FC error if 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1196 LA93F jsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1197 LA942 jsr LB70B ; evaluate expression to B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1198 tstb ; is it 0?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1199 bne LA984 ; brif not - return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1200 LA948 jmp LB44A ; raise FC error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1201 ; SOUND command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1202 SOUND bsr LA942 ; evaluate frequency
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1203 stb SNDTON ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1204 bsr LA93F ; evaluate duration (after a comma)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1205 LA951 lda #4 ; constant factor for duration (each increment is 1/15 of a second)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1206 mul
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1207 std SNDDUR ; save length of sound (IRQ will count it down)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1208 lda PIA0+3 ; enable 60 Hz interrupt
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1209 ora #1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1210 sta PIA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1211 clr ARYDIS ; clear array disable flag for some reason
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1212 bsr LA9A2 ; connect DAC to MUX output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1213 bsr LA976 ; turn on sound
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1214 LA964 bsr LA985 ; store mid range output value and delay
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1215 lda #0xfe ; store high value and delay
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1216 bsr LA987
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1217 bsr LA985 ; store mid range value and delay
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1218 lda #2 ; store low value and delay
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1219 bsr LA987
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1220 ldx SNDDUR ; has timer expired?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1221 bne LA964 ; brif not, do another wave
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1222 ; Disable sound output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1223 LA974 clra ; bit 3 to 0 will disable output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1224 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1225 ; Enable sound output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1226 LA976 lda #8 ; bit 3 set to enable output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1227 sta ,-s ; save desired value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1228 lda PIA1+3 ; get control register value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1229 anda #0xf7 ; reset value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1230 ora ,s+ ; set to desired value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1231 sta PIA1+3 ; set new sound output status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1232 LA984 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1233 LA985 lda #0x7e ; mid range value for DAC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1234 LA987 sta PIA1 ; set DAC output value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1235 lda SNDTON ; get frequency
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1236 LA98C inca ; increment it (gives shorter count with higher values, so higher frequencies work)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1237 bne LA98C ; brif not done yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1238 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1239 ; AUDIO command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1240 AUDIO tfr a,b ; save ON/OFF token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1241 jsr GETNCH ; munch the ON/OFF token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1242 cmpb #0xaa ; OFF?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1243 beq LA974 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1244 subb #0x88 ; ON?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1245 jsr LA5C9 ; do SN error if not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1246 incb ; now B is 1 - cassette sound source
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1247 bsr LA9A2 ; set MUX input to tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1248 bra LA976 ; enable sound
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1249 ; Set MUX source to value in B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1250 LA9A2 ldu #PIA0+1 ; point to PIA0 control register A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1251 bsr LA9A7 ; program bit 0 then fall through for bit 1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1252 LA9A7 lda ,u ; get control register value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1253 anda #0xf7 ; reset mux control bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1254 asrb ; shift desired value to C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1255 bcc LA9B0 ; brif this bit is clear
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1256 ora #8 ; set the bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1257 LA9B0 sta ,u++ ; set register value and move to next register
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1258 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1259 ; IRQ service routine
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1260 BIRQSV lda PIA0+3 ; check for VSYNC interrupt
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1261 bpl LA9C5 ; brif not - return. BUG: should clear HSYNC interrupt status first
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1262 lda PIA0+2 ; clear VSYNC interrupt status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1263 ldx >SNDDUR ; are we counting down for SOUND? (force extended in case DP is modified)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1264 beq LA9C5 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1265 leax -1,x ; count down one tick
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1266 stx >SNDDUR ; save new count (forced extended in case DP is modified)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1267 LA9C5 rti
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1268 ; JOYSTK function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1269 JOYSTK jsr LB70E ; evaluate which joystick axis is desired
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1270 cmpb #3 ; valid axis?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1271 lbhi LB44A ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1272 tstb ; want axis 0?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1273 bne LA9D4 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1274 bsr GETJOY ; read axis data if axis 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1275 LA9D4 ldx #POTVAL ; point to axis values
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1276 ldb FPA0+3 ; get desired axis
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1277 ldb b,x ; get axis value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1278 jmp LB4F3 ; return value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1279 ; Read all four joystick axes. Note that this routine will try 10 times to get a value that matches
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1280 ; the value obtained during the *previous call to this routine*. Thus, if the axis value has changed,
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1281 ; this routine will do the read *ten times* before just returning the last value. This is assininely
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1282 ; slow and probably a bug since it seems more logical to look for two matching reads in a row. Note
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1283 ; also that this routine should be using PSHS and PULS but it doesn't.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1284 GETJOY bsr LA974 ; turn off sound
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1285 ldx #POTVAL+4 ; point to the end of the axis data (we'll work backwards)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1286 ldb #3 ; start with axis 3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1287 LA9E5 lda #10 ; 10 tries to see if we match *the last call* to this routine
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1288 std ,--s ; save retry counter and axis number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1289 bsr LA9A2 ; set MUX for the correct axis
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1290 LA9EB ldd #0x4080 ; set initial trial value to mid range and the next difference to add/subtract to half
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1291 LA9EE sta ,-s ; store the add/subtract value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1292 orb #2 ; keep rs232 output marking
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1293 stb PIA1 ; set DAC output to the trial value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1294 eorb #2 ; remove RS232 output value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1295 lda PIA0 ; read the comparator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1296 bmi LA9FF ; brif comparator output is high (DAC is lower than the axis value)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1297 subb ,s ; subtract next bit value (split the difference toward 0)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1298 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1299 LA9FF addb ,s ; add next bit value (split the different toward infinity)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1300 lda ,s+ ; get bit value back
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1301 lsra ; cut in half
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1302 cmpa #1 ; have we done that last value for the DAC?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1303 bne LA9EE ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1304 lsrb ; normalize the axis value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1305 lsrb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1306 cmpb -1,x ; does it match the read from the last call to this routine?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1307 beq LAA12 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1308 dec ,s ; are we out of retries?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1309 bne LA9EB ; brif not - try again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1310 LAA12 stb ,-x ; save new value and move pointer back
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1311 ldd ,s++ ; get axis counter and clean up retry counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1312 decb ; move to next axis
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1313 bpl LA9E5 ; brif still more axes to do
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1314 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1315 ; This is the "bottom half" of the character fetching routines.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1316 BROMHK cmpa #'9+1 ; is it >= colon?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1317 bhs LAA28 ; brif so Z set if colon, C clear.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1318 cmpa #0x20 ; space?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1319 bne LAA24 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1320 jmp GETNCH ; move on to another character if space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1321 LAA24 suba #'0 ; normalize ascii digit to 0-9; we already handled above digit 9
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1322 suba #-'0 ; this will cause a carry for any value that was already positive
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1323 LAA28 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1324 ; Jump table for functions
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1325 LAA29 fdb SGN ; SGN 0x80
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1326 fdb INT ; INT 0x81
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1327 fdb ABS ; ABS 0x82
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1328 fdb USRJMP ; USR 0x83
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1329 fdb RND ; RND 0x84
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1330 fdb SIN ; SIN 0x85
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1331 fdb PEEK ; PEEK 0x86
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1332 fdb LEN ; LEN 0x87
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1333 fdb STR ; STR$ 0x88
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1334 fdb VAL ; VAL 0x89
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1335 fdb ASC ; ASC 0x8a
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1336 fdb CHR ; CHR$ 0x8b
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1337 fdb EOF ; EOF 0x8c
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1338 fdb JOYSTK ; JOYSTK 0x8d
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1339 fdb LEFT ; LEFT$ 0x8e
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1340 fdb RIGHT ; RIGHT$ 0x8f
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1341 fdb MID ; MID$ 0x90
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1342 fdb POINT ; POINT 0x91
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1343 fdb INKEY ; INKEY$ 0x92
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1344 fdb MEM ; MEM 0x93
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1345 ; Operator precedence and jump table (binary ops except relational)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1346 LAA51 fcb 0x79 ; +
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1347 fdb LB9C5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1348 fcb 0x79 ; -
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1349 fdb LB9BC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1350 fcb 0x7b ; *
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1351 fdb LBACC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1352 fcb 0x7b ; /
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1353 fdb LBB91
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1354 fcb 0x7f ; ^ (exponentiation)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1355 fdb EXPJMP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1356 fcb 0x50 ; AND
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1357 fdb LB2D5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1358 fcb 0x46 ; OR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1359 fdb LB2D4
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1360 ; Reserved words table for commands
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1361 LAA66 fcs 'FOR' ; 0x80
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1362 fcs 'GO' ; 0x81
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1363 fcs 'REM' ; 0x82
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1364 fcs "'" ; 0x83
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1365 fcs 'ELSE' ; 0x84
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1366 fcs 'IF' ; 0x85
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1367 fcs 'DATA' ; 0x86
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1368 fcs 'PRINT' ; 0x87
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1369 fcs 'ON' ; 0x88
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1370 fcs 'INPUT' ; 0x89
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1371 fcs 'END' ; 0x8a
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1372 fcs 'NEXT' ; 0x8b
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1373 fcs 'DIM' ; 0x8c
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1374 fcs 'READ' ; 0x8d
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1375 fcs 'RUN' ; 0x8e
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1376 fcs 'RESTORE' ; 0x8f
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1377 fcs 'RETURN' ; 0x90
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1378 fcs 'STOP' ; 0x91
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1379 fcs 'POKE' ; 0x92
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1380 fcs 'CONT' ; 0x93
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1381 fcs 'LIST' ; 0x94
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1382 fcs 'CLEAR' ; 0x95
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1383 fcs 'NEW' ; 0x96
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1384 fcs 'CLOAD' ; 0x97
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1385 fcs 'CSAVE' ; 0x98
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1386 fcs 'OPEN' ; 0x99
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1387 fcs 'CLOSE' ; 0x9a
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1388 fcs 'LLIST' ; 0x9b
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1389 fcs 'SET' ; 0x9c
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1390 fcs 'RESET' ; 0x9d
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1391 fcs 'CLS' ; 0x9e
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1392 fcs 'MOTOR' ; 0x9f
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1393 fcs 'SOUND' ; 0xa0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1394 fcs 'AUDIO' ; 0xa1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1395 fcs 'EXEC' ; 0xa2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1396 fcs 'SKIPF' ; 0xa3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1397 fcs 'TAB(' ; 0xa4
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1398 fcs 'TO' ; 0xa5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1399 fcs 'SUB' ; 0xa6
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1400 fcs 'THEN' ; 0xa7
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1401 fcs 'NOT' ; 0xa8
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1402 fcs 'STEP' ; 0xa9
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1403 fcs 'OFF' ; 0xaa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1404 fcs '+' ; 0xab
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1405 fcs '-' ; 0xac
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1406 fcs '*' ; 0xad
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1407 fcs '/' ; 0xae
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1408 fcs '^' ; 0xaf
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1409 fcs 'AND' ; 0xb0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1410 fcs 'OR' ; 0xb1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1411 fcs '>' ; 0xb2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1412 fcs '=' ; 0xb3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1413 fcs '<' ; 0xb4
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1414 ; Reserved word list for functions
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1415 LAB1A fcs 'SGN' ; 0x80
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1416 fcs 'INT' ; 0x81
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1417 fcs 'ABS' ; 0x82
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1418 fcs 'USR' ; 0x83
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1419 fcs 'RND' ; 0x84
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1420 fcs 'SIN' ; 0x85
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1421 fcs 'PEEK' ; 0x86
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1422 fcs 'LEN' ; 0x87
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1423 fcs 'STR$' ; 0x88
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1424 fcs 'VAL' ; 0x89
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1425 fcs 'ASC' ; 0x8a
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1426 fcs 'CHR$' ; 0x8b
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1427 fcs 'EOF' ; 0x8c
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1428 fcs 'JOYSTK' ; 0x8d
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1429 fcs 'LEFT$' ; 0x8e
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1430 fcs 'RIGHT$' ; 0x8f
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1431 fcs 'MID$' ; 0x90
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1432 fcs 'POINT' ; 0x91
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1433 fcs 'INKEY$' ; 0x92
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1434 fcs 'MEM' ; 0x93
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1435 ; Jump table for commands
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1436 LAB67 fdb FOR ; 0x80 FOR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1437 fdb GO ; 0x81 GO
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1438 fdb REM ; 0x82 REM
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1439 fdb REM ; 0x83 '
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1440 fdb REM ; 0x84 ELSE
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1441 fdb IFTOK ; 0x85 IF
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1442 fdb DATA ; 0x86 DATA
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1443 fdb PRINT ; 0x87 PRINT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1444 fdb ON ; 0x88 ON
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1445 fdb INPUT ; 0x89 INPUT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1446 fdb ENDTOK ; 0x8a END
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1447 fdb NEXT ; 0x8b NEXT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1448 fdb DIM ; 0x8c DIM
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1449 fdb READ ; 0x8d READ
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1450 fdb RUN ; 0x8e RUN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1451 fdb RESTOR ; 0x8f RESTORE
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1452 fdb RETURN ; 0x90 RETURN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1453 fdb STOP ; 0x91 STOP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1454 fdb POKE ; 0x92 POKE
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1455 fdb CONT ; 0x93 CONT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1456 fdb LIST ; 0x94 LIST
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1457 fdb CLEAR ; 0x95 CLEAR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1458 fdb NEW ; 0x96 NEW
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1459 fdb CLOAD ; 0x97 CLOAD
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1460 fdb CSAVE ; 0x98 CSAVE
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1461 fdb OPEN ; 0x99 OPEN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1462 fdb CLOSE ; 0x9a CLOSE
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1463 fdb LLIST ; 0x9b LLIST
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1464 fdb SET ; 0x9c SET
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1465 fdb RESET ; 0x9d RESET
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1466 fdb CLS ; 0x9e CLS
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1467 fdb MOTOR ; 0x9f MOTOR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1468 fdb SOUND ; 0xa0 SOUND
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1469 fdb AUDIO ; 0xa1 AUDIO
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1470 fdb EXEC ; 0xa2 EXEC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1471 fdb SKIPF ; 0xa3 SKIPF
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1472 ; Error message table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1473 LABAF fcc 'NF' ; 0 NEXT without FOR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1474 fcc 'SN' ; 1 Syntax error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1475 fcc 'RG' ; 2 RETURN without GOSUB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1476 fcc 'OD' ; 3 Out of data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1477 fcc 'FC' ; 4 Illegal function call
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1478 fcc 'OV' ; 5 Overflow
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1479 fcc 'OM' ; 6 Out of memory
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1480 fcc 'UL' ; 7 Undefined line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1481 fcc 'BS' ; 8 Bad subscript
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1482 fcc 'DD' ; 9 Redimensioned array
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1483 fcc '/0' ; 10 Division by 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1484 fcc 'ID' ; 11 Illegal direct statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1485 fcc 'TM' ; 12 Type mismatch
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1486 fcc 'OS' ; 13 Out of string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1487 fcc 'LS' ; 14 String too long
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1488 fcc 'ST' ; 15 String formula too complex
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1489 fcc 'CN' ; 16 Can't continue
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1490 fcc 'FD' ; 17 Bad file data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1491 fcc 'AO' ; 18 File already open
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1492 fcc 'DN' ; 19 Device number error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1493 fcc 'IO' ; 20 Input/output error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1494 fcc 'FM' ; 21 Bad file mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1495 fcc 'NO' ; 22 File not open
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1496 fcc 'IE' ; 23 Input past end of file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1497 fcc 'DS' ; 24 Direct statement in file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1498 LABE1 fcn ' ERROR'
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1499 LABE8 fcn ' IN '
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1500 LABED fcb 0x0d
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1501 LABEE fcc 'OK'
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1502 fcb 0x0d,0x00
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1503 LABF2 fcb 0x0d
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1504 fcn 'BREAK'
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1505 ; Search stack for a FOR/NEXT stack frame. Stop search when something that isn't a FOR/NEXT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1506 ; stack frame is found. Enter with the index variable descriptor pointer in VARDES, or NULL
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1507 ; for the first match.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1508 ;
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1509 ; NOTE: this routine can be reworked to avoid needed two temporaries by taking advantage of the
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1510 ; 6809's registers. This requires some minor tweaks where the routine is called. Further, the
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1511 ; use of B is completely pointless and, even if B is going to be used, why is it reloaded on
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1512 ; every loop?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1513 LABF9 leax 4,s ; skip past our caller and the main command loop return address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1514 LABFB ldb #18 ; each FOR/NEXT frame is 18 bytes
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1515 stx TEMPTR ; save current search pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1516 lda ,x ; get first byte of this frame
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1517 suba #0x80 ; set to 0 if FOR/NEXT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1518 bne LAC1A ; brif not FOR/NEXT (we hit the end of the stack for a GOSUB frame)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1519 ldx 1,x ; get index variable descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1520 stx TMPTR1 ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1521 ldx VARDES ; get desired index descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1522 beq LAC16 ; brif NULL - we found something
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1523 cmpx TMPTR1 ; does this one match?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1524 beq LAC1A ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1525 ldx TEMPTR ; get back frame pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1526 abx ; move to next entry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1527 bra LABFB ; check next block of data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1528 LAC16 ldx TMPTR1 ; get index variable of this frame
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1529 stx VARDES ; set it as the one found
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1530 LAC1A ldx TEMPTR ; get matching frame pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1531 tsta ; set Z if FOR/NEXT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1532 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1533 ; This is a block copy routine which copies from top to bottom. It's not clear that the use of
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1534 ; this routine actually saves any ROM space compared to just implementing the copies directly
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1535 ; once all the marshalling to set up the parameter variables is taken into account.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1536 LAC1E bsr LAC37 ; check to see if stack collides with D
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1537 LAC20 ldu V41 ; point to destination
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1538 leau 1,u ; offset for pre-dec
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1539 ldx V43 ; point to source
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1540 leax 1,x ; offset for pre-dec
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1541 LAC28 lda ,-x ; get source byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1542 pshu a ; store at destination (sta ,-u would be less weird)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1543 cmpx V47 ; at the bottom of the copy?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1544 bne LAC28 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1545 stu V45 ; save final destination address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1546 LAC32 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1547 ; Check for 2*B (0 <= B <= 127) bytes for free memory
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1548 LAC33 clra ; zero extend
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1549 aslb ; times 2 (loses bit 7 of B)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1550 addd ARYEND ; add to top of used memory
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1551 LAC37 addd #STKBUF ; add a fudge factor for interpreter operation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1552 bcs LAC44 ; brif >65535!
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1553 sts BOTSTK ; get current stack pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1554 cmpd BOTSTK ; is our new address above that?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1555 blo LAC32 ; brif not - no error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1556 LAC44 ldb #6*2 ; raise OM error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1557 ; The error servicing routine
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1558 LAC46 jsr RVEC16 ; do the RAM hook dance (ON ERROR reserved hook)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1559 LAC49 jsr RVEC17 ; do the RAM hook dance again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1560 jsr LA7E9 ; turn off tape
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1561 jsr LA974 ; disable sound
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1562 jsr LAD33 ; reset stack, etc.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1563 clr DEVNUM ; reset output to screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1564 jsr LB95C ; do a newline
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1565 jsr LB9AF ; send a ?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1566 ldx #LABAF ; point to error table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1567 abx ; offset to correct message
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1568 bsr LACA0 ; send a char from X
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1569 bsr LACA0 ; send another char from X
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1570 ldx #LABE1-1 ; point to "ERROR" message
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1571 LAC68 jsr LB99C ; print ERROR message (or BREAK)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1572 lda CURLIN ; are we in immediate mode?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1573 inca
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1574 beq LAC73 ; brif not - go to immediate mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1575 jsr LBDC5 ; print "IN ****"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1576 ; This is the immediate mode loop
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1577 LAC73 jsr LB95C ; do a newline if needed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1578 LAC76 ldx #LABEE-1 ; point to prompt (without leading CR)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1579 jsr LB99C ; show prompt
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1580 LAC7C jsr LA390 ; read an input line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1581 ldu #0xffff ; flag immediate mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1582 stu CURLIN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1583 bcs LAC7C ; brif we ended on BREAK - just go for another line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1584 tst CINBFL ; EOF?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1585 lbne LA4BF ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1586 stx CHARAD ; save start of input line as input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1587 jsr GETNCH ; get character from input line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1588 beq LAC7C ; brif no input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1589 bcs LACA5 ; brif numeric - adding or removing a line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1590 ldb #2*24 ; code for "direct statement in file"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1591 tst DEVNUM ; keyboard input?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1592 bne LAC46 ; brif not - complain about direct statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1593 jsr LB821 ; go tokenize the input line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1594 jmp LADC0 ; go execute the newly tokenized line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1595 LACA0 lda ,x+ ; get character and advance pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1596 jmp LB9B1 ; output it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1597 LACA5 jsr LAF67 ; convert line number to binary
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1598 ldx BINVAL ; get converted number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1599 stx LINHDR ; put it before the line we just read
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1600 jsr LB821 ; tokenize the input line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1601 stb TMPLOC ; save line length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1602 bsr LAD01 ; find where the line should be in the program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1603 bcs LACC8 ; brif the line number isn't already present
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1604 ldd V47 ; get address where the line is in the program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1605 subd ,x ; get the difference between here and the end of the line (negative)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1606 addd VARTAB ; subtract line length from the end of the program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1607 std VARTAB ; save new end of program address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1608 ldu ,x ; get start of next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1609 LACC0 pulu a ; get source byte (lda ,u+ would be less weird)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1610 sta ,x+ ; move it down
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1611 cmpx VARTAB ; have we moved everything yet?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1612 bne LACC0 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1613 LACC8 lda LINBUF ; see if there is actually a line to input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1614 beq LACE9 ; brif not - we just needed to remove the line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1615 ldd VARTAB ; get current end of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1616 std V43 ; set as source pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1617 addb TMPLOC ; add in the length of the new line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1618 adca #0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1619 std V41 ; save destination pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1620 jsr LAC1E ; make sure there's enough room and then make a hole for the new line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1621 ldu #LINHDR-2 ; point to the line (well, 4 bytes before it, incl line number and fake next line pointer)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1622 LACDD pulu a ; get byte from new line (lda ,u+ would be less weird)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1623 sta ,x+ ; stow it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1624 cmpx V45 ; at the end of the hole we just made?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1625 bne LACDD ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1626 ldx V41 ; get save new top of program address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1627 stx VARTAB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1628 LACE9 bsr LAD21 ; reset variables, etc.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1629 bsr LACEF ; adjust next line pointers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1630 bra LAC7C ; go read another input line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1631 ; Recompute next line pointers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1632 LACEF ldx TXTTAB ; point to start of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1633 LACF1 ldd ,x ; get address of next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1634 beq LAD16 ; brif end of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1635 leau 4,x ; move past pointer and line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1636 LACF7 lda ,u+ ; are we at the end of the line?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1637 bne LACF7 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1638 stu ,x ; save new next line pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1639 ldx ,x ; point to next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1640 bra LACF1 ; process the next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1641 ; Find a line in the program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1642 LAD01 ldd BINVAL ; get desired line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1643 ldx TXTTAB ; point to start of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1644 LAD05 ldu ,x ; get address of next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1645 beq LAD12 ; brif end of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1646 cmpd 2,x ; do we have a match?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1647 bls LAD14 ; brif our search number is <= the number here
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1648 ldx ,x ; move to next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1649 bra LAD05 ; check another line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1650 LAD12 orcc #1 ; set C for not found
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1651 LAD14 stx V47 ; save address of matching line *or* line just after where it would have been
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1652 LAD16 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1653 ; NEW command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1654 ; This routine has multiple entry points used for various "levels" of NEW
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1655 NEW bne LAD14 ; brif there was input given; should be LAD16!
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1656 LAD19 ldx TXTTAB ; point to start of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1657 clr ,x+ ; blank out program (with NULL next line pointer)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1658 clr ,x+
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1659 stx VARTAB ; save end of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1660 LAD21 ldx TXTTAB ; get start of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1661 jsr LAEBB ; put input pointer there
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1662 LAD26 ldx MEMSIZ ; reset string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1663 stx STRTAB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1664 jsr RESTOR ; reset DATA pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1665 ldx VARTAB ; clear out scalars and arrays
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1666 stx ARYTAB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1667 stx ARYEND
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1668 LAD33 ldx #STRSTK ; reset the string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1669 stx TEMPPT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1670 ldx ,s ; get return address (we're going to reset the stack)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1671 lds FRETOP ; reset the stack to top of memory
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1672 clr ,-s ; put stopper so FOR/NEXT search will actually stop here
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1673 clr OLDPTR ; reset "CONT" state
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1674 clr OLDPTR+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1675 clr ARYDIS ; un-disable arrays
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1676 jmp ,x ; return to original caller
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1677 ; FOR command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1678 FOR lda #0x80 ; disable array parsing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1679 sta ARYDIS
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1680 jsr LET ; assign start value to index
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1681 jsr LABF9 ; search stack for matching FOR/NEXT frame
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1682 leas 2,s ; lose return address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1683 bne LAD59 ; brif variable not already being used
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1684 ldx TEMPTR ; get address of matched data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1685 leas b,x ; move stack pointer to the end of it (B is set to 18 in the stack search)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1686 LAD59 ldb #9 ; is there room for 18 bytes in memory?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1687 jsr LAC33
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1688 jsr LAEE8 ; get address of the end of this statement in X
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1689 ldd CURLIN ; get line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1690 pshs x,b,a ; save next line address and current line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1691 ldb #0xa5 ; make sure we have TO
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1692 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1693 jsr LB143 ; make sure we have a numeric index
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1694 jsr LB141 ; evaluate terminal condition value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1695 ldb FP0SGN ; pack FPA0 in place
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1696 orb #0x7f
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1697 andb FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1698 stb FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1699 ldy #LAD7F ; where to come back to
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1700 jmp LB1EA ; stash terminal condition on the stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1701 LAD7F ldx #LBAC5 ; point to FP 1.0 (default step)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1702 jsr LBC14 ; unpack it to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1703 jsr GETCCH ; get character after the terminal
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1704 cmpa #0xa9 ; is it STEP?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1705 bne LAD90 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1706 jsr GETNCH ; eat STEP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1707 jsr LB141 ; evaluate step condition
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1708 LAD90 jsr LBC6D ; get "status" of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1709 jsr LB1E6 ; stash FPA0 on the stack (for step value)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1710 ldd VARDES ; get variable descriptor pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1711 pshs d ; put that on the stack too
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1712 lda #0x80 ; flag the frame as a FOR/NEXT frame
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1713 pshs a
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1714 ; Main command interpretation loop
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1715 LAD9E jsr RVEC20 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1716 andcc #0xaf ; make sure interrupts are running
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1717 bsr LADEB ; check for BREAK/pause
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1718 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1719 stx TINPTR ; save input pointer for start of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1720 lda ,x+ ; get current input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1721 beq LADB4 ; brif end of line - move to another line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1722 cmpa #': ; end of statement?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1723 beq LADC0 ; brif so - keep processing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1724 LADB1 jmp LB277 ; raise a syntax error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1725 LADB4 lda ,x++ ; get MSB of next line pointer and skip past pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1726 sta ENDFLG
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1727 beq LAE15 ; brif MSB of next line address is 0 (do END)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1728 ldd ,x+ ; get line number but only advance one
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1729 std CURLIN ; set current line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1730 stx CHARAD ; set input pointer to one before line text
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1731 LADC0 jsr GETNCH ; move past statement separator or to first character in line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1732 bsr LADC6 ; process a command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1733 bra LAD9E ; handle next statement or line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1734 LADC6 beq LAE40 ; return if end of statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1735 tsta ; is it a token?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1736 lbpl LET ; brif not - do a LET
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1737 cmpa #0xa3 ; above SKIPF?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1738 bhi LADDC ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1739 ldx COMVEC+3 ; point to jump table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1740 lsla ; two bytes per entry (loses the token bias)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1741 tfr a,b ; put it in B for unsigned ABX
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1742 abx
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1743 jsr GETNCH ; move past token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1744 jmp [,x] ; transfer control to the handler (which will return to the main loop)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1745 LADDC cmpa #0xb4 ; is it a non-executable token?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1746 bls LADB1 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1747 jmp [COMVEC+13] ; transfer control to ECB command handler
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1748 ; RESTORE command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1749 RESTOR ldx TXTTAB ; point to beginning of the program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1750 leax -1,x ; move back one (to compensate for "GETNCH")
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1751 LADE8 stx DATPTR ; save as new data pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1752 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1753 ; BREAK check
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1754 LADEB jsr KEYIN ; read keyboard
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1755 beq LADFA ; brif no key down
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1756 LADF0 cmpa #3 ; BREAK?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1757 beq STOP ; brif so - do a STOP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1758 cmpa #0x13 ; pause (SHIFT-@)?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1759 beq LADFB ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1760 sta IKEYIM ; cache key for later INKEY$ so break check doesn't break INKEY$
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1761 LADFA rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1762 LADFB jsr KEYIN ; read keyboard
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1763 beq LADFB ; brif no key down
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1764 bra LADF0 ; process pressed key in case BREAK or SHIFT-@ again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1765 ; END command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1766 ENDTOK jsr LA426 ; close files
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1767 jsr GETCCH ; re-get input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1768 bra LAE0B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1769 ; STOP command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1770 STOP orcc #1 ; flag "STOP"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1771 LAE0B bne LAE40 ; brif not end of statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1772 ldx CHARAD ; save current input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1773 stx TINPTR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1774 LAE11 ror ENDFLG ; save END/STOP flag (C)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1775 leas 2,s ; lose return address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1776 LAE15 ldx CURLIN ; get current input line (end of program comes here)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1777 cmpx #0xffff ; immediate mode?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1778 beq LAE22 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1779 stx OLDTXT ; save line where we stopped executing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1780 ldx TINPTR ; get input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1781 stx OLDPTR ; save location where we stopped executing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1782 LAE22 clr DEVNUM ; reset to screen/keyboard
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1783 ldx #LABF2-1 ; point to BREAK message
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1784 tst ENDFLG ; are we doing "BREAK"?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1785 lbpl LAC73 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1786 jmp LAC68 ; go do the BREAK message and return to main loop
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1787 ; CONT command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1788 CONT bne LAE40 ; brif not end of statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1789 ldb #2*16 ; code for can't continue
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1790 ldx OLDPTR ; get saved execution pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1791 lbeq LAC46 ; brif no saved pointer - raise CN error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1792 stx CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1793 ldx OLDTXT ; reset current line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1794 stx CURLIN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1795 LAE40 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1796 ; CLEAR command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1797 CLEAR beq LAE6F ; brif no argument
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1798 jsr LB3E6 ; evaluate string space size
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1799 pshs d ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1800 ldx MEMSIZ ; get memory size (top of memory)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1801 jsr GETCCH ; is there anything after the string space size?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1802 beq LAE5A ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1803 jsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1804 jsr LB73D ; get top of memory value in X
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1805 leax -1,x ; move back one (top of cleared space)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1806 cmpx TOPRAM ; is it within the memory available?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1807 bhi LAE72 ; brif higher than top of memory - OM error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1808 LAE5A tfr x,d ; so we can do math for checking memory usage
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1809 subd ,s++ ; subtract out string space value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1810 bcs LAE72 ; brif less than 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1811 tfr d,u ; U is bottom of cleared space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1812 subd #STKBUF ; also account for slop space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1813 bcs LAE72 ; brif less than 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1814 subd VARTAB ; is there still room for the program?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1815 blo LAE72 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1816 stu FRETOP ; set top of free memory
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1817 stx MEMSIZ ; set size of usable memory
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1818 LAE6F jmp LAD26 ; erase variables, etc.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1819 LAE72 jmp LAC44 ; raise OM error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1820 ; RUN command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1821 RUN jsr RVEC18 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1822 jsr LA426 ; close any open files
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1823 jsr GETCCH ; is there a line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1824 lbeq LAD21 ; brif no line number - start from beginning
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1825 jsr LAD26 ; clear variables, etc.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1826 bra LAE9F ; "GOTO" the line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1827 ; GO command (GOTO and GOSUB)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1828 GO tfr a,b ; save TO/SUB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1829 LAE88 jsr GETNCH ; eat the TO/SUB token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1830 cmpb #0xa5 ; TO?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1831 beq LAEA4 ; brif GOTO
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1832 cmpb #0xa6 ; SUB?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1833 bne LAED7 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1834 ldb #3 ; room for 6 bytes?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1835 jsr LAC33
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1836 ldu CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1837 ldx CURLIN ; get line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1838 lda #0xa6 ; flag for GOSUB frame
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1839 pshs u,x,a ; set stack frame
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1840 LAE9F bsr LAEA4 ; do "GOTO"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1841 jmp LAD9E ; go back to main loop
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1842 ; Actual GOTO is here
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1843 LAEA4 jsr GETCCH ; get current input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1844 jsr LAF67 ; convert number to binary
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1845 bsr LAEEB ; move input pointer to end of statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1846 leax 1,x ; point to start of next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1847 ldd BINVAL ; get desired line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1848 cmpd CURLIN ; is it beyond here?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1849 bhi LAEB6 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1850 ldx TXTTAB ; start search at beginning of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1851 LAEB6 jsr LAD05 ; find line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1852 bcs LAED2 ; brif not found
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1853 LAEBB leax -1,x ; move to just before start of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1854 stx CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1855 LAEBF rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1856 ; RETURN command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1857 RETURN bne LAEBF ; exit if argument given
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1858 lda #0xff ; set VARDES to an illegal value so we ignore FOR frames
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1859 sta VARDES
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1860 jsr LABF9 ; look for a GOSUB frame
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1861 tfr x,s ; reset stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1862 cmpa #0xa6-0x80 ; is it a GOSUB frame?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1863 beq LAEDA ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1864 ldb #2*2 ; code for RETURN without GOSUB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1865 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1866 LAED2 ldb #7*2 ; code for undefined line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1867 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1868 LAED7 jmp LB277 ; raise syntax error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1869 LAEDA puls a,x,u ; get back saved line number and input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1870 stx CURLIN ; reset line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1871 stu CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1872 ; DATA command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1873 DATA bsr LAEE8 ; move input pointer to end of statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1874 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1875 ; REM command (also ELSE)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1876 REM bsr LAEEB ; move input pointer to end of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1877 stx CHARAD ; save new input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1878 LAEE7 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1879 ; Return end of statement (LAEE8) or line (AEEB) in X
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1880 LAEE8 ldb #': ; colon is statement terminator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1881 skip1lda
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1882 LAEEB clrb ; make main terminator NUL
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1883 stb CHARAC ; save terminator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1884 clrb ; end of line - always terminates
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1885 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1886 LAEF1 tfr b,a ; save secondary terminator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1887 ldb CHARAC ; get main terminator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1888 sta CHARAC ; save secondary
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1889 LAEF7 lda ,x ; get input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1890 beq LAEE7 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1891 pshs b ; save terminator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1892 cmpa ,s+ ; does it match?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1893 beq LAEE7 ; brif so - bail
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1894 leax 1,x ; move pointer ahead
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1895 cmpa #'" ; start of string?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1896 beq LAEF1 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1897 inca ; functon token?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1898 bne LAF0C ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1899 leax 1,x ; skip second part of function token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1900 LAF0C cmpa #0x85+1 ; IF?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1901 bne LAEF7 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1902 inc IFCTR ; bump "IF" count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1903 bra LAEF7 ; get check another input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1904 ; IF command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1905 IFTOK jsr LB141 ; evaluate condition
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1906 jsr GETCCH ; find out what's after the conditin
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1907 cmpa #0x81 ; GO?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1908 beq LAF22 ; treat same as THEN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1909 ldb #0xa7 ; make sure we have a THEN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1910 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1911 LAF22 lda FP0EXP ; get true/false (false is 0)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1912 bne LAF39 ; brif condition true
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1913 clr IFCTR ; reset IF counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1914 LAF28 bsr DATA ; skip over statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1915 tsta ; end of line?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1916 beq LAEE7 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1917 jsr GETNCH ; get start of this statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1918 cmpa #0x84 ; ELSE?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1919 bne LAF28 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1920 dec IFCTR ; is it a matching ELSE?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1921 bpl LAF28 ; brif not - keep looking
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1922 jsr GETNCH ; eat the ELSE
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1923 LAF39 jsr GETCCH ; get current input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1924 lbcs LAEA4 ; brif numeric - to a GOTO
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1925 jmp LADC6 ; let main loop interpret the next command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1926 ; ON command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1927 ON jsr LB70B ; evaluate index expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1928 LAF45 ldb #0x81 ; make sure we have "GO"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1929 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1930 pshs a ; save TO/SUB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1931 cmpa #0xa6 ; SUB?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1932 beq LAF54 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1933 cmpa #0xa5 ; TO?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1934 LAF52 bne LAED7 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1935 LAF54 dec FPA0+3 ; are we at the right index?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1936 bne LAF5D ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1937 puls b ; get TO/SUB token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1938 jmp LAE88 ; go do GOTO or GOSUB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1939 LAF5D jsr GETNCH ; munch a character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1940 bsr LAF67 ; parse line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1941 cmpa #', ; is there another line following?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1942 beq LAF54 ; brif so - see if we're there yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1943 puls b,pc ; clean up TO/SUB token and return - we fell through
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1944 ; Parse a line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1945 LAF67 ldx ZERO ; initialize line number accumulator to 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1946 stx BINVAL
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1947 LAF6B bcc LAFCE ; brif not numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1948 suba #'0 ; adjust to actual value of digit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1949 sta CHARAC ; save digit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1950 ldd BINVAL ; get accumulated number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1951 cmpa #24 ; will this overflow?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1952 bhi LAF52 ; brif so - raise syntax error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1953 aslb ; times 2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1954 rola
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1955 aslb ; times 4
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1956 rola
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1957 addd BINVAL ; times 5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1958 aslb ; times 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1959 rola
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1960 addb CHARAC ; add in digit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1961 adca #0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1962 std BINVAL ; save new accumulated number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1963 jsr GETNCH ; fetch next character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1964 bra LAF6B ; process next digit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1965 ; LET command (the LET keyword requires Extended Basic)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1966 LET jsr LB357 ; evaluate destination variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1967 stx VARDES ; save descriptor pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1968 ldb #0xb3 ; make sure we have =
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1969 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1970 lda VALTYP ; get destination variable type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1971 pshs a ; save it for later
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1972 jsr LB156 ; evaluate the expression to assign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1973 puls a ; get back original variable type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1974 rora ; put type in C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1975 jsr LB148 ; make sure the current result matches the type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1976 lbeq LBC33 ; bri fnumeric - copy FPA0 to variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1977 LAFA4 ldx FPA0+2 ; point to descriptor of replacement string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1978 ldd FRETOP ; get bottom of string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1979 cmpd 2,x ; is the string already in string space?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1980 bhs LAFBE ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1981 cmpx VARTAB ; is the descriptor in variable space?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1982 blo LAFBE ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1983 LAFB1 ldb ,x ; get length of string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1984 jsr LB50D ; allocate space for this string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1985 ldx V4D ; get descriptor pointer back
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1986 jsr LB643 ; copy string into string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1987 ldx #STRDES ; point to temporary string descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1988 LAFBE stx V4D ; save descriptor pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1989 jsr LB675 ; remove string from string stack if appropriate
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1990 ldu V4D ; get back replacement descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1991 ldx VARDES ; get target descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1992 pulu a,b,y ; get string length (A) and data pointer (Y)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1993 sta ,x ; save new length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1994 sty 2,x ; save new pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1995 LAFCE rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1996 ; READ and INPUT commands.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1997 LAFCF fcc '?REDO' ; The ?REDO message
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1998 fcb 0x0d,0x00
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
1999 LAFD6 ldb #2*17 ; bad file data code
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2000 tst DEVNUM ; are we reading from the keyboard?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2001 beq LAFDF ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2002 LAFDC jmp LAC46 ; raise the error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2003 LAFDF lda INPFLG ; are we doing INPUT?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2004 beq LAFEA ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2005 ldx DATTXT ; get line number where the DATA statement happened
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2006 stx CURLIN ; set current line number to that so can report the correct location
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2007 jmp LB277 ; raise a syntax error on bad data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2008 LAFEA ldx #LAFCF-1 ; show the ?REDO if we're doing INPUT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2009 jsr LB99C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2010 ldx TINPTR ;* reset input pointer to start of statement (this will cause the
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2011 stx CHARAD ;* INPUT statement to be re-executed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2012 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2013 INPUT ldb #11*2 ; code for illegal direct statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2014 ldx CURLIN ; are we in immediate mode?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2015 leax 1,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2016 beq LAFDC ; brif so - raise ID error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2017 bsr LB002 ; go do the INPUT thing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2018 clr DEVNUM ; reset device to screen/keyboard
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2019 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2020 LB002 cmpa #'# ; is there a device number?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2021 bne LB00F ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2022 jsr LA5A5 ; parse device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2023 jsr LA3ED ; make sure it's valid for input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2024 jsr LB26D ; make sure we have a comma after the device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2025 LB00F cmpa #'" ; is there a prompt string?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2026 bne LB01E ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2027 jsr LB244 ; parse the prompt string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2028 ldb #'; ; make sure we have a semicolon after the prompt
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2029 jsr LB26F
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2030 jsr LB99F ; print the prompt
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2031 LB01E ldx #LINBUF ; point to line input buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2032 clr ,x ; NUL first byte to indicate no data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2033 tst DEVNUM ; is it keyboard input?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2034 bne LB049 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2035 bsr LB02F ; read a line from the keyboard
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2036 ldb #', ; put a comma at the start of the buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2037 stb ,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2038 bra LB049 ; go process some input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2039 LB02F jsr LB9AF ; send a ?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2040 jsr LB9AC ; send a space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2041 LB035 jsr LA390 ; read input from the keyboard
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2042 bcc LB03F ; brif not BREAK
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2043 leas 4,s ; clean up stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2044 LB03C jmp LAE11 ; go process BREAK
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2045 LB03F ldb #2*23 ; input past end of file error code
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2046 tst CINBFL ; was it EOF?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2047 bne LAFDC ; brif so - raise the error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2048 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2049 READ ldx DATPTR ; fetch current DATA pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2050 skip1lda ; set A to nonzero (for READ)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2051 LB049 clra ; set A to zero (for INPUT)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2052 sta INPFLG ; record whether we're doing READ or INPUT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2053 stx DATTMP ; save current input location
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2054 LB04E jsr LB357 ; evaluate a variable (destination of data)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2055 stx VARDES ; save descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2056 ldx CHARAD ; save interpreter input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2057 stx BINVAL
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2058 ldx DATTMP ; get data pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2059 lda ,x ; is there anything to read?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2060 bne LB069 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2061 lda INPFLG ; is it INPUT?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2062 bne LB0B9 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2063 jsr RVEC10 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2064 jsr LB9AF ; send a ? (so subsequent lines get ??)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2065 bsr LB02F ; go read an input line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2066 LB069 stx CHARAD ; save data pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2067 jsr GETNCH ; fetch next data character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2068 ldb VALTYP ; do we want a number?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2069 beq LB098 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2070 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2071 sta CHARAC ; save initial character as the delimiter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2072 cmpa #'" ; do we have a string delimiter?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2073 beq LB08B ; brif so - use " as both delimiters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2074 leax -1,x ; back up input if we don't have a delimiter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2075 clra ; set delimiter to NUL (end of line)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2076 sta CHARAC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2077 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2078 tst PRTDEV ; is it a file type device?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2079 bne LB08B ; brif so - use two NULs
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2080 lda #': ; use colon as one delimiter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2081 sta CHARAC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2082 lda #', ; and use comma as the other
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2083 LB08B sta ENDCHR ; save second terminator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2084 jsr LB51E ; parse out the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2085 jsr LB249 ; move input pointer past the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2086 jsr LAFA4 ; assign the string to the variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2087 bra LB09E ; go see if there's more to read
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2088 LB098 jsr LBD12 ; parse a numeric string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2089 jsr LBC33 ; assign the numbe to the variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2090 LB09E jsr GETCCH ; get current input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2091 beq LB0A8 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2092 cmpa #', ; check for comma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2093 lbne LAFD6 ; brif not - we have bad data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2094 LB0A8 ldx CHARAD ; get current data pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2095 stx DATTMP ; save the data pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2096 ldx BINVAL ; restore the interpreter input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2097 stx CHARAD
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2098 jsr GETCCH ; get current input from program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2099 beq LB0D5 ; brif end of statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2100 jsr LB26D ; make sure there's a comma between variables
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2101 bra LB04E ; go read another item
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2102 LB0B9 stx CHARAD ; reset input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2103 jsr LAEE8 ; search for end of statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2104 leax 1,x ; move past end of statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2105 tsta ; was it end of line?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2106 bne LB0CD ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2107 ldb #2*3 ; code for out of data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2108 ldu ,x++ ; get pointer to next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2109 beq LB10A ; brif end of program - raise OD error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2110 ldd ,x++ ; get line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2111 std DATTXT ; record it for raising errors in DATA statements
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2112 LB0CD lda ,x ; do we have a DATA statement?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2113 cmpa #0x86
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2114 bne LB0B9 ; brif not - keep scanning
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2115 bra LB069 ; go process the input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2116 LB0D5 ldx DATTMP ; get data pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2117 ldb INPFLG ; were we doing READ?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2118 lbne LADE8 ; brif so - save DATA pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2119 lda ,x ; is there something after the input in the input buffer?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2120 beq LB0E7 ; brif not - we consumed everything
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2121 ldx #LB0E8-1 ; print the ?EXTRA IGNORED message
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2122 jmp LB99C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2123 LB0E7 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2124 LB0E8 fcc '?EXTRA IGNORED'
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2125 fcb 0x0d,0x00
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2126 ; NEXT command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2127 NEXT bne LB0FE ; brif argument given
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2128 ldx ZERO ; set to NULL descriptor pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2129 bra LB101 ; go process "any index will do"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2130 LB0FE jsr LB357 ; evaluate the variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2131 LB101 stx VARDES ; save the index we're looking for
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2132 jsr LABF9 ; search the stack for the matching frame
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2133 beq LB10C ; brif we found a matching frame
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2134 ldb #0 ; code for NEXT without FOR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2135 LB10A bra LB153 ; raise the error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2136 LB10C tfr x,s ; reset the stack to the start of the stack frame
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2137 leax 3,x ; point to the STEP value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2138 jsr LBC14 ; copy the value to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2139 lda 8,s ; get step direction
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2140 sta FP0SGN ; save as sign of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2141 ldx VARDES ; point to index variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2142 jsr LB9C2 ; add (X) to FPA0 (steps the index)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2143 jsr LBC33 ; save new value to the index
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2144 leax 9,s ; point to terminal condition
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2145 jsr LBC96 ; compare the new index value with the terminal
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2146 subb 8,s ; set B=0 if we hit the terminal (or passed it with nonzero step)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2147 beq LB134 ; brif loop complete
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2148 ldx 14,s ; restore line number and input pointer to start of loop
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2149 stx CURLIN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2150 ldx 16,s
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2151 stx CHARAD
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2152 LB131 jmp LAD9E ; return to interpretation loop
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2153 LB134 leas 18,s ; remove the frame from the stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2154 jsr GETCCH ; get character after the index
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2155 cmpa #', ; do we have more indexes?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2156 bne LB131 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2157 jsr GETNCH ; munch the comma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2158 bsr LB0FE ; go process another value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2159 ; NOTE: despite the BSR on the preceding line, execution of the NEXT command will not fall
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2160 ; through this point, nor will the stack grow without bound. The BSR is required to make sure
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2161 ; the stack is aligned properly for the stack search for the subsequent index variable.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2162 ;
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2163 ; The following is the expression evaluation system. It has various entry points including for type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2164 ; checking. This really consists of two co-routines, one for evaluating operators and one for individual
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2165 ; terms. However, it does some rather confusing stack operations so it's a bit difficult to follow
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2166 ; just how some of this works.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2167 ;
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2168 ; Evaluate numeric expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2169 LB141 bsr LB156 ; evaluate an expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2170 ; TM error if string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2171 LB143 andcc #0xfe ; clear C to indicate we want a number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2172 skip2keepc
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2173 ; TM error if numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2174 LB146 orcc #1 ; set C to indicate we want a string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2175 ; TM error if: C = 1 and number, OR C = 0 and string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2176 LB148 tst VALTYP ; set flags on the current value to (doesn't change C)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2177 bcs LB14F ; brif we want a string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2178 bpl LB0E7 ; brif we have a number (we want a number)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2179 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2180 LB14F bmi LB0E7 ; brif we have a string (we want a string)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2181 LB151 ldb #12*2 ; code for TM error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2182 LB153 jmp LAC46 ; raise the error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2183 ; The general expression evaluation entry point
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2184 LB156 bsr LB1C6 ; back up input pointer to compensate for GETNCH below
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2185 LB158 clra ; set operator precedence to 0 (no previous operator)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2186 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2187 LB15A pshs b ; save relational operator flags
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2188 pshs a ; save previous operator precedence
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2189 ldb #1 ; make sure we aren't overflowing the stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2190 jsr LAC33
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2191 jsr LB223 ; go evaluate the first term
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2192 LB166 clr TRELFL ; flag no relational operators seen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2193 LB168 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2194 LB16A suba #0xb2 ; token for > (lowest relational operator)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2195 blo LB181 ; brif below relational operators
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2196 cmpa #3 ; there are three relational operators, is it one?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2197 bhs LB181 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2198 cmpa #1 ; set C if >
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2199 rola ; shift C into bit 0 (4: <, 2: =, 1: >)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2200 eora TRELFL ; flip the bit for this operator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2201 cmpa TRELFL ; did the result get lower?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2202 blo LB1DF ; brif so - we have a duplicate so raise an error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2203 sta TRELFL ; save new operator flags
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2204 jsr GETNCH ; munch the operator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2205 bra LB16A ; go see if we have another one
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2206 LB181 ldb TRELFL ; do we have a relational comparison?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2207 bne LB1B8 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2208 lbcc LB1F4 ; brif the token is above the relational operators
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2209 adda #7 ; put operators starting at 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2210 bhs LB1F4 ; brif we're above 0 - it's an operator, Jim
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2211 adca VALTYP ; add carry, numeric flag, and modified token number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2212 lbeq LB60F ; brif we have string and A is + - do concatenation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2213 adca #-1 ; restore operator number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2214 pshs a ; save operator number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2215 asla ; times 2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2216 adda ,s+ ; and times 3 (3 bytes per entry)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2217 ldx #LAA51 ; point to operator pecedence and jump table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2218 leax a,x ; point to correct entry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2219 LB19F puls a ; get precedence of previous operation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2220 cmpa ,x ; is hit higher (or same) than the current one?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2221 bhs LB1FA ; brif so - we need to process that operator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2222 bsr LB143 ; TM error if we have a string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2223 LB1A7 pshs a ; save previous operation precedence
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2224 bsr LB1D4 ; push operator handler address and FPA0 onto the stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2225 ldx RELPTR ; get pointer to arithmetic/logical table entry for last operation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2226 puls a ; get back precedence
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2227 bne LB1CE ; brif we had a relational operation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2228 tsta ; check precedence of previous operation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2229 lbeq LB220 ; brif end of expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2230 bra LB203 ; go handle operation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2231 LB1B8 asl VALTYP ; get type of value to C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2232 rolb ; mix it in to bit 0 of relational flags
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2233 bsr LB1C6 ; back up input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2234 ldx #LB1CB ; point to relational operator precedence and handler
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2235 stb TRELFL ; save relational comparison flags
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2236 clr VALTYP ; result will be numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2237 bra LB19F ; to process the operation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2238 LB1C6 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2239 jmp LAEBB ; back it up one and put it back
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2240 LB1CB fcb 0x64 ; precedence of relational comparison
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2241 fdb LB2F4 ; handler address for relational comparison
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2242 LB1CE cmpa ,x ; is last done operation higher (or same) precedence?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2243 bhs LB203 ; brif so - go process it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2244 bra LB1A7 ; go push things on the stack and process this operation otherwise
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2245 LB1D4 ldd 1,x ; get address of operatorroutine
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2246 pshs d ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2247 bsr LB1E2 ; push FPA0 onto the stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2248 ldb TRELFL ; get back relational operator flags
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2249 lbra LB15A ; go evaluate another operation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2250 LB1DF jmp LB277 ; raise a syntax error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2251 LB1E2 ldb FP0SGN ; get sign of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2252 lda ,x ; get precedence of this operation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2253 LB1E6 puls y ; get back original caller
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2254 pshs b ; save sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2255 LB1EA ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2256 ldx FPA0 ; get mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2257 ldu FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2258 pshs u,x,b ; stow FPA0 sign and mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2259 jmp ,y ; return to caller
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2260 LB1F4 ldx ZERO ; point to dummy value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2261 lda ,s+ ; get precedence of previous operation (and set flags)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2262 beq LB220 ; brif end of expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2263 LB1FA cmpa #0x64 ; relational operation?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2264 beq LB201 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2265 jsr LB143 ; type mismatch if string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2266 LB201 stx RELPTR ; save pointer to operator routine
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2267 LB203 puls b ; get relational flags
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2268 cmpa #0x5a ; NOT operation?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2269 beq LB222 ; brif so (it was unary)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2270 cmpa #0x7d ; unary negation?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2271 beq LB222 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2272 lsrb ; shift value type flag out of relational flags
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2273 stb RELFLG ; save relational operator flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2274 puls a,x,u ; get FP value back
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2275 sta FP1EXP ; set exponent and mantissa in FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2276 stx FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2277 stu FPA1+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2278 puls b ; and the sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2279 stb FP1SGN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2280 eorb FP0SGN ; set RESSGN if the two operand signs differ
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2281 stb RESSGN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2282 LB220 ldb FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2283 LB222 rts ; return or transfer control to operator handler routine
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2284 LB223 jsr RVEC15 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2285 clr VALTYP ; set type to numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2286 LB228 jsr GETNCH ; get first character in the term
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2287 bcc LB22F ; brif not numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2288 LB22C jmp LBD12 ; parse a number (and return)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2289 LB22F jsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2290 bcc LB284 ; brif alpha character (variable)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2291 cmpa #'. ; decimal point?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2292 beq LB22C ; brif so - evaluate number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2293 cmpa #0xac ; minus?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2294 beq LB27C ; brif so - process unary negation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2295 cmpa #0xab ; plus?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2296 beq LB228 ; brif so - ignore unary "posation"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2297 cmpa #'" ; string delimiter?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2298 bne LB24E ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2299 LB244 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2300 jsr LB518 ; go parse the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2301 LB249 ldx COEFPT ; get address of end of string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2302 stx CHARAD ; move input pointer past string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2303 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2304 LB24E cmpa #0xa8 ; NOT?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2305 bne LB25F ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2306 lda #0x5a ; precedence of unary NOT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2307 jsr LB15A ; process the operand of NOT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2308 jsr INTCNV ; convert to integer in D
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2309 coma ; do a bitwise complement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2310 comb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2311 jmp GIVABF ; resturn the result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2312 LB25F inca ; is it a function token?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2313 beq LB290 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2314 LB262 bsr LB26A ; only other legal thing must be a (expr)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2315 jsr LB156 ; evaluate parentheticized expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2316 LB267 ldb #') ; force a )
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2317 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2318 LB26A ldb #'( ; force a (
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2319 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2320 LB26D ldb #', ; force a ,
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2321 LB26F cmpb [CHARAD] ; does character match?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2322 bne LB277 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2323 jmp GETNCH ; each the character and return the next
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2324 LB277 ldb #2*1 ; raise syntax error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2325 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2326 LB27C lda #0x7d ; unary negation precedence
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2327 jsr LB15A ; evaluate argument
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2328 jmp LBEE9 ; flip sign of FPA0 and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2329 LB284 jsr LB357 ; evaluate variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2330 LB287 stx FPA0+2 ; save descriptor address in FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2331 lda VALTYP ; test variable type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2332 bne LB222 ; brif string - we're done
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2333 jmp LBC14 ; copy FP number from (X) into FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2334 LB290 jsr GETNCH ; get the actual token number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2335 tfr a,b ; save it (for offsetting X)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2336 lslb ; two bytes per jump table entry (and lose high bit)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2337 jsr GETNCH ; eat the token byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2338 cmpb #2*19 ; is it a valid token for Color Basic?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2339 bls LB29F ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2340 jmp [COMVEC+18] ; transfer control to Extended Basic if not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2341 LB29F pshs b ; save jump table offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2342 cmpb #2*14 ; does it expect a numeric argument?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2343 blo LB2C7 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2344 cmpb #2*18 ; does it need no arguments?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2345 bhs LB2C9 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2346 bsr LB26A ; force a (
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2347 lda ,s ; get token value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2348 cmpa #2*17 ; is it POINT?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2349 bhs LB2C9 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2350 jsr LB156 ; evaluate first argument string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2351 bsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2352 jsr LB146 ; TM error if string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2353 puls a ; get token value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2354 ldu FPA0+2 ; get string descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2355 pshs u,a ; now we save the first string argument and the token value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2356 jsr LB70B ; evaluate first numeric argument
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2357 puls a ; get back token value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2358 pshs b,a ; save second argument and token value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2359 fcb 0x8e ; opcode of LDX immediate (skips two bytes)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2360 LB2C7 bsr LB262 ; force a (
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2361 LB2C9 puls b ; get offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2362 ldx COMVEC+8 ; get jump table pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2363 abx ; add offset into table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2364 jsr [,x] ; go process function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2365 jmp LB143 ; make sure result is numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2366 ; operator OR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2367 LB2D4 skip1lda ; set flag to nonzero to signal OR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2368 ; operator AND
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2369 LB2D5 clra ; set flag to zero to signal AND
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2370 sta TMPLOC ; save AND/OR flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2371 jsr INTCNV ; convert second argument to intenger
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2372 std CHARAC ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2373 jsr LBC4A ; move first argument to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2374 jsr INTCNV ; convert first argument to integer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2375 tst TMPLOC ; is it AND or OR?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2376 bne LB2ED ; brif OR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2377 anda CHARAC ; do the bitwise AND
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2378 andb ENDCHR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2379 bra LB2F1 ; finish up
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2380 LB2ED ora CHARAC ; do the bitwise OR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2381 orb ENDCHR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2382 LB2F1 jmp GIVABF ; return integer result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2383 ; relational comparision operators
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2384 LB2F4 jsr LB148 ; TM error if type mismatch
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2385 BNE LB309 ; brif we have a string comparison
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2386 lda FP1SGN ; pack FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2387 ora #0x7f
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2388 anda FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2389 sta FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2390 ldx #FP1EXP ; point to packed FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2391 jsr LBC96 ; compare FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2392 bra LB33F ; handle truth comparison
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2393 LB309 clr VALTYP ; the result of a comparison is always a number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2394 dec TRELFL ; remove the string flag from the comparison data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2395 jsr LB657 ; get string details for second argument
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2396 stb STRDES ; save them in the temporary string descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2397 stx STRDES+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2398 ldx FPA1+2 ; get pointer to first argument descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2399 jsr LB659 ; get string details for second argument
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2400 lda STRDES ; get length of second argument
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2401 pshs b ; save length of first argument
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2402 suba ,s+ ; now A is the difference in string lengths
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2403 beq LB328 ; brif string lengths are equal
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2404 lda #1 ; flag for second argument is longer than first
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2405 bcc LB328 ; brif second string is longer than first
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2406 ldb STRDES ; get length of second string (shorter)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2407 nega ; invert default comparison result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2408 LB328 sta FP0SGN ; save default truth flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2409 ldu STRDES+2 ; get pointer to start of second string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2410 incb ; compensate for DECB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2411 LB32D decb ; have we compared everything?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2412 bne LB334 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2413 ldb FP0SGN ; get default truth value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2414 bra LB33F ; decide comparison truth
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2415 LB334 lda ,x+ ; get byte from first argument
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2416 cmpa ,u+ ; compare with second argument
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2417 beq LB32D ; brif equal - keep comparing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2418 ldb #0xff ; negative if first string is > second
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2419 bcc LB33F ; brif string A > string B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2420 negb ; invert result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2421 LB33F addb #1 ; convert to 0,1,2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2422 rolb ; shift left - now it's 4,2,1 for <, =, >
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2423 andb RELFLG ; keep only the truth we care about
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2424 beq LB348 ; brif no matching bits - it's false
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2425 ldb #0xff ; set true
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2426 LB348 jmp LBC7C ; convert result to FP and return it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2427 ; DIM command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2428 LB34B jsr LB26D ; make sure there's a comma between variables
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2429 DIM ldb #1 ; flag that we're dimensioning
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2430 bsr LB35A ; go allocate the variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2431 jsr GETCCH ; are we done?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2432 bne LB34B ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2433 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2434 ; This routine parses a variable. For scalars, it will return a NULL string or 0 value number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2435 ; if it is called from "evaluate term". Otherwise, it allocates the variable. For arrays, it will
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2436 ; allocate a default sized array if dimensioning is not underway and then attempt to look up
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2437 ; the requested coordinates in that array. Otherwise, it will allocate an array based on the
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2438 ; specified dimension values.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2439 LB357 clrb ; flag that we're not setting up an array
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2440 jsr GETCCH
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2441 LB35A stb DIMFLG ; save dimensioning flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2442 sta VARNAM ; save first character of variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2443 jsr GETCCH ; get input character (why? we already have it)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2444 bsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2445 lbcs LB277 ; brif our variable doesn't start with a letter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2446 clrb ; default second variable character to NUL
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2447 stb VALTYP ; set value type to numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2448 jsr GETNCH ; get second character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2449 bcs LB371 ; brif numeric - numbers are allowed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2450 bsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2451 bcs LB37B ; brif not alpha
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2452 LB371 tfr a,b ; save set second character of variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2453 LB373 jsr GETNCH ; get an input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2454 bcs LB373 ; brif numeric - still in variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2455 bsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2456 bcc LB373 ; brif alpha - still in variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2457 LB37B cmpa #'$ ; do we have the string sigil?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2458 bne LB385 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2459 com VALTYP ; set value type to string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2460 addb #0x80 ; set bit 7 of second variable character to indicate string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2461 jsr GETNCH ; eat the sigil
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2462 LB385 stb VARNAM+1 ; save second variable name character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2463 ora ARYDIS ; merge array disable flag (will set bit 7 of input character if no arrays)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2464 suba #'( ; do we have a subscript?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2465 lbeq LB404 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2466 clr ARYDIS ; disable the array disable flag - it's single use
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2467 ldx VARTAB ; point to the start of the variable table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2468 ldd VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2469 LB395 cmpx ARYTAB ; are we at the top of the variable table?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2470 beq LB3AB ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2471 cmpd ,x++ ; does the variable name match (and move pointer to variable data)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2472 beq LB3DC ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2473 leax 5,x ; move to next table entry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2474 bra LB395 ; see if we have a match
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2475 ; Set carry if not upper case alpha
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2476 LB3A2 cmpa #'A ; set C if less than A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2477 bcs LB3AA ; brif less than A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2478 suba #'Z+1 ; set C if greater than Z
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2479 suba #-('Z+1)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2480 LB3AA rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2481 LB3AB ldx #ZERO ; point to empty location (NULL/0 value)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2482 ldu ,s ; get caller address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2483 cmpu #LB287 ; coming from "evaluate term"?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2484 beq LB3DE ; brif so - don't allocate
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2485 ldd ARYEND ; get end of arrays
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2486 std V43 ; save as top of source block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2487 addd #7 ; 7 bytes per scalar entry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2488 std V41 ; save as top of destination block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2489 ldx ARYTAB ; get bottom of arrays
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2490 stx V47 ; save as bottom of source block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2491 jsr LAC1E ; move the arrays up to make a hole
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2492 ldx V41 ; get new top of arrays
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2493 stx ARYEND ; set new end of arrays
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2494 ldx V45 ; get bottom of destination block
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2495 stx ARYTAB ; set as new start of arrays
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2496 ldx V47 ; get old end of variables
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2497 ldd VARNAM ; get name of variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2498 std ,x++ ; set variable name and advance X to the value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2499 clra ; zero out the variable value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2500 clrb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2501 std ,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2502 std 2,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2503 sta 4,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2504 LB3DC stx VARPTR ; save descriptor address of return value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2505 LB3DE rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2506 ; Various integer conversion routines
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2507 LB3DF fcb 0x90,0x80,0x00,0x00,0x00 ; FP constant -32768
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2508 LB3E4 jsr GETNCH ; fetch input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2509 LB3E6 jsr LB141 ; evaluate numeric expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2510 LB3E9 lda FP0SGN ; get sign of value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2511 bmi LB44A ; brif negative (raise FC error)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2512 INTCNV lda FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2513 cmpa #0x90 ; is it within the range for a 16 bit integer?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2514 blo LB3FE ; brif smaller than 32768
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2515 ldx #LB3DF ; point to -32678 constant
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2516 jsr LBC96 ; is FPA0 equal to -32768?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2517 bne LB44A ; brif not - magnitude is too far negative
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2518 LB3FE jsr LBCC8 ; move binary point to the right of FPA0 and correct sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2519 ldd FPA0+2 ; get the resulting integer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2520 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2521 LB404 ldb DIMFLG ; get dimensioning flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2522 lda VALTYP ; get type of variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2523 pshs b,a ; save them (to avoid issues while evaluating dimension values)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2524 clrb ; reset dimension counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2525 LB40A ldx VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2526 pshs x,b ; save dimension counter and variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2527 bsr LB3E4 ; evaluate a dimension value (and skip either ( or ,)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2528 puls b,x,y ; get variable name, dimension counter, and dimensioning/type flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2529 stx VARNAM ; restore variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2530 ldu FPA0+2 ; get dimension size/index
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2531 pshs u,y ; save dimension size and dimensioning/type flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2532 incb ; bump dimension counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2533 jsr GETCCH ; get what's after the dimension count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2534 cmpa #', ; do we have another dimension?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2535 beq LB40A ; brif so - parse it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2536 stb TMPLOC ; save dimension counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2537 jsr LB267 ; make sure we have a )
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2538 puls a,b ; get back variable type and dimensioning flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2539 sta VALTYP ; restore variable type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2540 stb DIMFLG ; restore dimensioning flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2541 ldx ARYTAB ; get start of arrays
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2542 LB42A cmpx ARYEND ; are we at the end of the array table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2543 beq LB44F ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2544 ldd VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2545 cmpd ,x ; does it match?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2546 beq LB43B ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2547 ldd 2,x ; get length of this array
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2548 leax d,x ; move to next array
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2549 bra LB42A ; go check another entry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2550 LB43B ldb #2*9 ; code for redimensioned array error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2551 lda DIMFLG ; are we dimensioning?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2552 bne LB44C ; brif so - raise error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2553 ldb TMPLOC ; get number of dimensions given
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2554 cmpb 4,x ; does it match?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2555 beq LB4A0 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2556 LB447 ldb #8*2 ; raise "bad subscript"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2557 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2558 LB44A ldb #4*2 ; raise "illegal function call"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2559 LB44C jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2560 LB44F ldd #5 ; 5 bytes per array entry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2561 std COEFPT ; initialize array size to entry size
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2562 ldd VARNAM ; get variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2563 std ,x ; set array name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2564 ldb TMPLOC ; get dimension count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2565 stb 4,x ; set dimension count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2566 jsr LAC33 ; make sure we haven't overflowed memory
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2567 stx V41 ; save array descriptor address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2568 LB461 ldb #11 ; default dimension value (zero-based, gives max index of 10)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2569 clra ; zero extend (??? why not LDD above?)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2570 tst DIMFLG ; are we dimensioning?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2571 beq LB46D ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2572 puls a,b ; get dimension size
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2573 addd #1 ; account for zero based indexing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2574 LB46D std 5,x ; save dimension size
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2575 bsr LB4CE ; multiply by accumulated array size
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2576 std COEFPT ; save new array size
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2577 leax 2,x ; move to next dimension
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2578 dec TMPLOC ; have we done all dimensions?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2579 bne LB461 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2580 stx TEMPTR ; save end of array descriptor (minus 5)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2581 addd TEMPTR ; add total size of array to address of descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2582 lbcs LAC44 ; brif it overflows memory
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2583 tfr d,x ; save end of array for later
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2584 jsr LAC37 ; does array fit in memory?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2585 subd #STKBUF-5 ; subtract out the "stack fudge factor" but add 5 to the result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2586 std ARYEND ; save new end of arrays
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2587 clra ; set up for clearing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2588 LB48C leax -1,x ; move back one
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2589 sta 5,x ; blank out a byte in the array data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2590 cmpx TEMPTR ; have we reached the array header?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2591 bne LB48C ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2592 ldx V41 ; get address of start of descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2593 lda ARYEND ; get MSB of end of array back (B still has LSB)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2594 subd V41 ; subtract start of descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2595 std 2,x ; save length of array in array header
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2596 lda DIMFLG ; are we dimensioning?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2597 bne LB4CD ; brif so - we're done
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2598 LB4A0 ldb 4,x ; get number of dimensions
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2599 stb TMPLOC ; initialize counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2600 clra ; initialize accumulated offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2601 clrb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2602 LB4A6 std COEFPT ; save accumulated offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2603 puls a,b ; get desired index
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2604 std FPA0+2 ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2605 cmpd 5,x ; is it in range for this dimension?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2606 bhs LB4EB ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2607 ldu COEFPT ; get accumulated offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2608 beq LB4B9 ; brif first dimension
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2609 bsr LB4CE ; multiply accumulated offset by dimension length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2610 addd FPA0+2 ; add in offset into this dimension
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2611 LB4B9 leax 2,x ; move to next dimension in header
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2612 dec TMPLOC ; done all dimensions?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2613 bne LB4A6 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2614 std ,--s ; save D for multiply by 5 (should be pshs d)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2615 aslb ; times 2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2616 rola
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2617 aslb ; times 4
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2618 rola
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2619 addd ,s++ ; times 5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2620 leax d,x ; add in offset from start of array data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2621 leax 5,x ; offset to end of header
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2622 stx VARPTR ; save pointer to element data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2623 LB4CD rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2624 ; multiply 16 bit number at 5,x by the 16 bit number in COEFPT; return result in D; BS error if carry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2625 LB4CE lda #16 ; 16 shifts to do a multiply
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2626 sta V45 ; save shift counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2627 ldd 5,x ; get multiplier
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2628 std BOTSTK ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2629 clra ; zero out product
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2630 clrb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2631 LB4D8 aslb ; shift product left
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2632 rola
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2633 bcs LB4EB ; brif we have a carry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2634 asl COEFPT+1 ; shift other factor left
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2635 rol COEFPT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2636 bcc LB4E6 ; brif no carry - this bit position is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2637 addd BOTSTK ; add in multiplier at this bit position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2638 bcs LB4EB ; brif carry - do an error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2639 LB4E6 dec V45 ; have we done all 16 bits?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2640 bne LB4D8 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2641 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2642 LB4EB jmp LB447 ; raise a BS error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2643 ; MEM function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2644 ; BUG: this doesn't account for the STKBUF fudge factor used for memory availability checks
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2645 MEM tfr s,d ; get stack pointer where we can do math
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2646 subd ARYEND ; calculate number of bytes between the stack and the top of arrays
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2647 skip1 ; return result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2648 ; Convert unsigned value in B to FP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2649 LB4F3 clra ; zero extend
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2650 ; Convert signed value in D to FP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2651 GIVABF clr VALTYP ; set value type to numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2652 std FPA0 ; save value in FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2653 ldb #0x90 ; exponent for top two bytes to be an integer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2654 jmp LBC82 ; finish conversion to integer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2655 ; STR$ function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2656 STR jsr LB143 ; make sure we have a number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2657 ldu #STRBUF+2 ; convert FP number to string in temporary string buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2658 jsr LBDDC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2659 leas 2,s ; don't return to the function evaluator (which will do a numeric type check)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2660 ldx #STRBUF+1 ; point to number string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2661 bra LB518 ; to stash the string in string space and return to the "evaluate term" caller
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2662 ; Reserve B bytes of string space. Return start in X and FRESPC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2663 LB50D stx V4D ; save X somewhere in case the caller needs it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2664 LB50F bsr LB56D ; allocate string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2665 LB511 stx STRDES+2 ; save pointer to allocated space in the temporary descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2666 stb STRDES ; save length in the temporary descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2667 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2668 LB516 leax -1,x ; move pointer back one (to compensate for the increment below)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2669 ; Scan from X until either NUL or one of the string terminators is found
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2670 LB518 lda #'" ; set terminator to be string delimiter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2671 LB51A sta CHARAC ; set both delimiters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2672 sta ENDCHR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2673 LB51E leax 1,x ; move to next character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2674 stx RESSGN ; save start of string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2675 stx STRDES+2 ; save start of string in the temporary string descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2676 ldb #-1 ; initialize length counter to -1 (compensate for initial INCB)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2677 LB526 incb ; bump string length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2678 lda ,x+ ; get character from string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2679 beq LB537 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2680 cmpa CHARAC ; is it delimiter #1?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2681 beq LB533 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2682 cmpa ENDCHR ; is it delimiter #2?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2683 bne LB526 ; brif not - keep scanning
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2684 LB533 cmpa #'" ; string delimiter?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2685 beq LB539 ; brif so - don't move pointer back
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2686 LB537 leax -1,x ; move pointer back (so we don't consume the delimiter)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2687 LB539 stx COEFPT ; save end of string address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2688 stb STRDES ; save string length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2689 ldu RESSGN ; get start of string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2690 cmpu #STRBUF+2 ; is it at the start of the string buffer?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2691 bhi LB54C ; brif so - don't copy it to string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2692 bsr LB50D ; allocate string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2693 ldx RESSGN ; point to beginning of the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2694 jsr LB645 ; copy string data (B bytes) from (X) to (FRESPC)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2695 ; Put temporary string descriptor on the string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2696 LB54C ldx TEMPPT ; get top of string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2697 cmpx #CFNBUF ; is the string stack full?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2698 bne LB558 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2699 ldb #15*2 ; code for "string formula too complex"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2700 LB555 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2701 LB558 lda STRDES ; get string length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2702 sta 0,x ; save it in the string stack descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2703 ldd STRDES+2 ; get string data pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2704 std 2,x ; save in string stack descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2705 lda #0xff ; set value type to string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2706 sta VALTYP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2707 stx LASTPT ; set pointer to last used entry on the string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2708 stx FPA0+2 ; set pointer to descriptor in the current evaluation value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2709 leax 5,x ; advance string stack pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2710 stx TEMPPT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2711 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2712 ; Reserve B bytes in string space. If there isn't enough space, try compacting string space and
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2713 ; then try the allocation again. If it still fails, raise OS error.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2714 LB56D clr GARBFL ; flag that compaction not yet done
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2715 LB56F clra ; zero extend the length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2716 pshs d ; save requested string length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2717 ldd STRTAB ; get current bottom of strings
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2718 subd ,s+ ; calculate new bottom of strings and remove zero extension
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2719 cmpd FRETOP ; does the string fit?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2720 blo LB585 ; brif not - try compaction
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2721 std STRTAB ; save new bottom of strings
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2722 ldx STRTAB ; get bottom of strings
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2723 leax 1,x ; now X points to the real start of the allocated space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2724 stx FRESPC ; save the string pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2725 puls b,pc ; restore length and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2726 LB585 ldb #2*13 ; code for out of string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2727 com GARBFL ; have we compacted string space yet?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2728 beq LB555 ; brif so - raise error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2729 bsr LB591 ; compact string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2730 puls b ; get back string length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2731 bra LB56F ; go try allocation again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2732 ; Compact string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2733 ; This is an O(n^2) algorithm. It first searches all extant strings for the highest address data pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2734 ; that hasn't already been moved into the freshly compacted string space. If then moves that string data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2735 ; up to the highest address it can go to. It repeats this process over and over until it finds no string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2736 ; that isn't already in the compacted space. While doing this, it has to search all strings on the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2737 ; stack (this is why the string stack is needed - so we can track anonymous strings), all scalar string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2738 ; variables, and *every* entry in every string array.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2739 LB591 ldx MEMSIZ ; get to of string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2740 LB593 stx STRTAB ; save top of uncompacted stringspace
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2741 clra ; zero out D and reset pointer to discovered variable to NULL
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2742 clrb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2743 std V4B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2744 ldx FRETOP ; point to bottom of string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2745 stx V47 ; save as lowest match address (match will be higher)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2746 ldx #STRSTK ; point to start of string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2747 LB5A0 cmpx TEMPPT ; are we at the top of the string stack?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2748 beq LB5A8 ; brif so - done with the string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2749 bsr LB5D8 ; check for string in uncompacted space (and advance pointer)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2750 bra LB5A0 ; check another on the string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2751 LB5A8 ldx VARTAB ; point to start of scalar variables
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2752 LB5AA cmpx ARYTAB ; end of scalars?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2753 beq LB5B2 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2754 bsr LB5D2 ; check for string in uncompacted space and advance pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2755 bra LB5AA ; check another variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2756 LB5B2 stx V41 ; save address of end of variables (address of first array)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2757 LB5B4 ldx V41 ; get start of the next array
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2758 LB5B6 cmpx ARYEND ; end of arrays?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2759 beq LB5EF ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2760 ldd 2,x ; get length of array
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2761 addd V41 ; add to start of array
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2762 std V41 ; save address of next array
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2763 lda 1,x ; get second character of variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2764 bpl LB5B4 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2765 ldb 4,x ; get number of dimensions
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2766 aslb ; two bytes per dimension size
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2767 addb #5 ; add in fixed overhead for array descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2768 abx ; now X points to first array element
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2769 LB5CA cmpx V41 ; at the start of the next array?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2770 beq LB5B6 ; brif so - go handle another array
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2771 bsr LB5D8 ; check for string in uncompacted space (and advance pointer)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2772 bra LB5CA ; process next array element
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2773 LB5D2 lda 1,x ; get second character of variable name
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2774 leax 2,x ; move to variable data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2775 bpl LB5EC ; brif numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2776 LB5D8 ldb ,x ; get length of string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2777 beq LB5EC ; brif NULL - don't need to check data pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2778 ldd 2,x ; get data pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2779 cmpd STRTAB ; is it in compacted string space?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2780 bhi LB5EC ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2781 cmpd V47 ; is it better match than previous best?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2782 bls LB5EC ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2783 stx V4B ; save descriptor address of best match
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2784 std V47 ; save new best data pointer match
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2785 LB5EC leax 5,x ; move to next descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2786 LB5EE rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2787 LB5EF ldx V4B ; get descriptor address of the matched string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2788 beq LB5EE ; brif we didn't find one - we're done
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2789 clra ; zero extend length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2790 ldb ,x ; get string length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2791 decb ; subtract one (we won't have a NULL string here)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2792 addd V47 ; now D points to the address of the end of the string data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2793 std V43 ; save as top address of move
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2794 ldx STRTAB ; set top of uncompacted space as destination
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2795 stx V41
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2796 jsr LAC20 ; move string to top of uncompactedspace
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2797 ldx V4B ; point to string descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2798 ldd V45 ; get new data pointer address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2799 std 2,x ; update descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2800 ldx V45 ; get bottom of copy destination
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2801 leax -1,x ; move back below it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2802 jmp LB593 ; go search for another string to move (and set new bottom of string space)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2803 ; Concatenate two strings. We come here directly from the operator handler rather than via a JSR.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2804 LB60F ldd FPA0+2 ; get string descriptor for the first string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2805 pshs d ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2806 jsr LB223 ; evaluate a second string (concatenation is left associative)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2807 jsr LB146 ; make sure we have a string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2808 puls x ; get back first string descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2809 stx RESSGN ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2810 ldb ,x ; get length of first string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2811 ldx FPA0+2 ; get pointer to second string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2812 addb ,x ; add length of second string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2813 bcc LB62A ; brif combined length is OK
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2814 ldb #2*14 ; raise string too long error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2815 jmp LAC46
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2816 LB62A jsr LB50D ; reserve room for new string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2817 ldx RESSGN ; get descriptor address of the first string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2818 ldb ,x ; get length of first string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2819 bsr LB643 ; copy it to string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2820 ldx V4D ; get descriptor address of second string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2821 bsr LB659 ; get string details for second string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2822 bsr LB645 ; copy second string into new string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2823 ldx RESSGN ; get pointer to first string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2824 bsr LB659 ; remove it from the string stack if possible
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2825 jsr LB54C ; put new string on the string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2826 jmp LB168 ; return to expression evaluator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2827 ; Copy B bytes to space pointed to by FRESPC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2828 LB643 ldx 2,x ; get source address from string descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2829 LB645 ldu FRESPC ; get destination address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2830 incb ; compensate for decb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2831 bra LB64E ; do the copy
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2832 LB64A lda ,x+ ; copy a byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2833 sta ,u+
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2834 LB64E decb ; done yet?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2835 bne LB64A ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2836 stu FRESPC ; save destination pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2837 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2838 ; Fetch details of string in FPA0+2 and remove from the string stack if possible
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2839 LB654 jsr LB146 ; make sure we have a string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2840 LB657 ldx FPA0+2 ; get descriptor pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2841 LB659 ldb ,x ; get length of string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2842 bsr LB675 ; see if it's at the top of the string stack and remove it if so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2843 bne LB672 ; brif not removed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2844 ldx 5+2,x ; get start address of string just removed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2845 leax -1,x ; move pointer down 1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2846 cmpx STRTAB ; is it at the bottom of string space?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2847 bne LB66F ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2848 pshs b ; save length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2849 addd STRTAB ; add length to start of strings (A was cleared previously)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2850 std STRTAB ; save new string space start (deallocated space for this string)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2851 puls b ; get back string length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2852 LB66F leax 1,x ; restore pointer to pointing at the actual string data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2853 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2854 LB672 ldx 2,x ; get data pointer for the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2855 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2856 ; Remove string pointed to by X from the string stack if it is at the top of the stack; return with
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2857 ; A clear and Z set if string removed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2858 LB675 cmpx LASTPT ; is it at the top of the string stack?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2859 bne LB680 ; brif not - do nothing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2860 stx TEMPPT ; save new top of stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2861 leax -5,x ; move the "last" pointer back as well
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2862 stx LASTPT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2863 clra ; flag string removed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2864 LB680 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2865 ; LEN function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2866 LEN bsr LB686 ; get string details
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2867 LB683 jmp LB4F3 ; return unsigned length in B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2868 LB686 bsr LB654 ; get string details and remove from string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2869 clr VALTYP ; set value type to numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2870 tstb ; set flags according to length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2871 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2872 ; CHR$ function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2873 CHR jsr LB70E ; get 8 bit unsigned integer to B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2874 LB68F ldb #1 ; allocate a one byte string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2875 jsr LB56D
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2876 lda FPA0+3 ; get character code
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2877 jsr LB511 ; save reserved string details in temp descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2878 sta ,x ; put character in string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2879 LB69B leas 2,s ; don't go back to function handler - avoid numeric type check
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2880 LB69D jmp LB54C ; return temporary string on string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2881 ; ASC function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2882 ASC bsr LB6A4 ; get first character of argument
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2883 bra LB683 ; return unsigned code in B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2884 LB6A4 bsr LB686 ; fetch string details
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2885 beq LB706 ; brif NULL string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2886 ldb ,x ; get character at start of string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2887 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2888 ; LEFT$ function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2889 LEFT bsr LB6F5 ; get arguments from the stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2890 LB6AD clra ; clear pointer offset (set to start of string)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2891 LB6AE cmpb ,x ; are we asking for more characters than there are in the string?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2892 bls LB6B5 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2893 ldb ,x ; only return the number that are in the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2894 clra ; force starting offset to be the start of the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2895 LB6B5 pshs b,a ; save offset and length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2896 jsr LB50F ; reserve space in string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2897 ldx V4D ; point to original string descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2898 bsr LB659 ; get string details
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2899 puls b ; get string offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2900 abx ; now X points to the start of the data to copy
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2901 puls b ; get length of copy
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2902 jsr LB645 ; copy the data to the allocated space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2903 bra LB69D ; return temp string on string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2904 ; RIGHT$ function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2905 RIGHT bsr LB6F5 ; get arguments from stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2906 suba ,x ; subtract length of original string from desired length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2907 nega ; now A is offset into old string where we start copying
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2908 bra LB6AE ; go handle everything else
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2909 ; MID$ function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2910 MID ldb #255 ; default length is the whole string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2911 stb FPA0+3 ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2912 jsr GETCCH ; see what we have after offset
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2913 cmpa #') ; end of function?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2914 beq LB6DE ; brif so - no length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2915 jsr LB26D ; force a comma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2916 bsr LB70B ; get length parameter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2917 LB6DE bsr LB6F5 ; get string and offset parameters from the stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2918 beq LB706 ; brif we have a 0 offset requested (string offsets are 1-based)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2919 clrb ; clear length counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2920 deca ; subtract one from position parameter (we work on 0-based, param is 1-based)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2921 cmpa ,x ; is start greater than length of string?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2922 bhs LB6B5 ; brif so - return NULL string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2923 tfr a,b ; save absolute position parameter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2924 subb ,x ; now B is postition less length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2925 negb ; now B is amount of string to copy
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2926 cmpb FPA0+3 ; is it less than the length requested?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2927 bls LB6B5 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2928 ldb FPA0+3 ; set length to the requested length
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2929 bra LB6B5 ; go finish up copying the substring
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2930 ; Common routine for LEFT$, RIGHT$, MID$ - check for ) and fetch string data and first parameter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2931 ; from the stack. These were evaluated in the function evaluation handler. (It's not clear that doing
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2932 ; it that way is actually beneficial. However, this is what the ROM designers did, so here we are.)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2933 LB6F5 jsr LB267 ; make sure we have )
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2934 ldu ,s ; get return address - we're going to mess with the stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2935 ldx 5,s ; get address of string descriptor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2936 stx V4D ; save descriptor adddress
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2937 lda 4,s ; get first numeric parameter in both A and B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2938 ldb 4,s
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2939 leas 7,s ; clean up stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2940 tfr u,pc ; return to original caller
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2941 LB706 jmp LB44A ; raise FC error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2942 ; Evaluate an unsigned 8 bit expression to B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2943 LB709 jsr GETNCH ; move to next character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2944 LB70B jsr LB141 ; evaluate a numeric expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2945 LB70E jsr LB3E9 ; convert to integer in D
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2946 tsta ; are we negative or > 255?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2947 bne LB706 ; brif so - FC error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2948 jmp GETCCH ; fetch current input character and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2949 ; VAL function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2950 VAL jsr LB686 ; get string details
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2951 lbeq LBA39 ; brif NULL string - return 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2952 ldu CHARAD ; get input pointer so we can replace it later
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2953 stx CHARAD ; point interpreter at string data
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2954 abx ; calculate end address of the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2955 lda ,x ; get byte after the end of the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2956 pshs u,x,a ; save end of string address, input pointer, and character after end of string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2957 clr ,x ; put a NUL after the string (stops the number interpreter)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2958 jsr GETCCH ; get input character at start of string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2959 jsr LBD12 ; evaluate numeric expression in string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2960 puls a,x,u ; get back saved character and pointers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2961 sta ,x ; restore byte after string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2962 stu CHARAD ; restore interpeter's input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2963 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2964 ; Evaluate unsigned expression to BINVAL, then evaluate an unsigned expression to B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2965 LB734 bsr LB73D ; evaluate expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2966 stx BINVAL ; save result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2967 LB738 jsr LB26D ; make sure there's a comma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2968 bra LB70B ; evaluate unsigned expression to B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2969 ; Evaluate unsigned expression in X
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2970 LB73D jsr LB141 ; evaluate numeric expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2971 LB740 lda FP0SGN ; is it negative?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2972 bmi LB706 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2973 lda FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2974 cmpa #0x90 ; largest possible exponent for 16 bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2975 bhi LB706 ; brif too large
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2976 jsr LBCC8 ; move binary point to right of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2977 ldx FPA0+2 ; get resulting unsigned value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2978 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2979 ; PEEK function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2980 PEEK bsr LB740 ; get address to X
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2981 ldb ,x ; get the value at that address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2982 jmp LB4F3 ; return B as unsigned value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2983 ; POKE function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2984 POKE bsr LB734 ; evaluate address and byte value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2985 ldx BINVAL ; get address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2986 stb ,x ; put value there
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2987 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2988 ; LLIST command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2989 LLIST ldb #-2 ; set output device to printer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2990 stb DEVNUM
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2991 jsr GETCCH ; reset flags for input character and fall through to LIST
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2992 ; LIST command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2993 LIST pshs cc ; save zero flag (end of statement)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2994 jsr LAF67 ; parse line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2995 jsr LAD01 ; find address of that line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2996 stx LSTTXT ; save that address as the start of the list
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2997 puls cc ; get back ent of statement flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2998 beq LB784 ; brif end of line - list whole program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
2999 jsr GETCCH ; are we at the end of the line (one number)?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3000 beq LB789 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3001 cmpa #0xac ; is it "-"?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3002 bne LB783 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3003 jsr GETNCH ; eat the "-"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3004 beq LB784 ; brif no second number - list to end of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3005 jsr LAF67 ; evaluate the second number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3006 beq LB789 ; brif illegal number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3007 LB783 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3008 LB784 ldu #0xffff ; this will cause listing to do the entire program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3009 stu BINVAL
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3010 LB789 leas 2,s ; don't return to the caller - we'll jump back to the main loop
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3011 ldx LSTTXT ; get address of line to list
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3012 LB78D jsr LB95C ; do a newline if needed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3013 jsr LA549 ; do a break check
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3014 ldd ,x ; get address of next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3015 bne LB79F ; brif not end of program
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3016 LB797 jsr LA42D ; close output file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3017 clr DEVNUM ; reset device to screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3018 jmp LAC73 ; go back to immediate mode
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3019 LB79F stx LSTTXT ; save new line address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3020 ldd 2,x ; get line number of this line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3021 cmpd BINVAL ; is it above the end line?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3022 bhi LB797 ; brif so - return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3023 jsr LBDCC ; display line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3024 jsr LB9AC ; put a space after it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3025 ldx LSTTXT ; get line address
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3026 bsr LB7C2 ; detokenize the line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3027 ldx [LSTTXT] ; get pointer to next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3028 ldu #LINBUF+1 ; point to start of detokenized line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3029 LB7B9 lda ,u+ ; get byte from detokenized line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3030 beq LB78D ; brif end of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3031 jsr LB9B1 ; output character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3032 bra LB7B9 ; handle next character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3033 ; Detokenize a line from (X) to the line input buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3034 LB7C2 jsr RVEC24 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3035 leax 4,x ; move past next line pointer and line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3036 ldy #LINBUF+1 ; point to line input buffer (destination)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3037 LB7CB lda ,x+ ; get character from tokenized line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3038 beq LB820 ; brif end of input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3039 bmi LB7E6 ; brif it's a token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3040 cmpa #': ; colon?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3041 bne LB7E2 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3042 ldb ,x ; get what's after the colon
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3043 cmpb #0x84 ; ELSE?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3044 beq LB7CB ; brif so - suppress the colon
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3045 cmpb #0x83 ; '?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3046 beq LB7CB ; brif so - suppress the colon
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3047 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3048 LB7E0 lda #'! ; placeholder for unknown token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3049 LB7E2 bsr LB814 ; stow output character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3050 bra LB7CB ; go process another input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3051 LB7E6 ldu #COMVEC-10 ; point to command interptation table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3052 cmpa #0xff ; is it a function?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3053 bne LB7F1 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3054 lda ,x+ ; get function token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3055 leau 5,u ; shift to the function half of the interpretation tables
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3056 LB7F1 anda #0x7f ; remove token bias
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3057 LB7F3 leau 10,u ; move to next command/function table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3058 tst ,u ; is this table active?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3059 beq LB7E0 ; brif not - use place holder
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3060 suba ,u ; subtract number of tokens handled by this table entry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3061 bpl LB7F3 ; brif this token isn't handled here
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3062 adda ,u ; undo extra subtraction
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3063 ldu 1,u ; get reserved word list for this table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3064 LB801 deca ; are we at the right entry?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3065 bmi LB80A ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3066 LB804 tst ,u+ ; end of entry?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3067 bpl LB804 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3068 bra LB801 ; see if we're there yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3069 LB80A lda ,u ; get character from wordlist
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3070 bsr LB814 ; put character in the buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3071 tst ,u+ ; end of word?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3072 bpl LB80A ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3073 bra LB7CB ; go handle another input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3074 LB814 cmpy #LINBUF+LBUFMX ; is there room?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3075 bhs LB820 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3076 anda #0x7f ; lose bit 7
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3077 sta ,y+ ; save character in output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3078 clr ,y ; make sure there's always a NUL terminator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3079 LB820 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3080 ; Tokenize the line that the input pointer is pointing to; put result in the line input buffer; return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3081 ; length in D
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3082 LB821 jsr RVEC23 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3083 ldx CHARAD ; get input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3084 ldu #LINBUF ; set destination pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3085 LB829 clr V43 ; clear alpha string flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3086 clr V44 ; clear DATA flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3087 LB82D lda ,x+ ; get input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3088 beq LB852 ; brif end of input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3089 tst V43 ; are we handling an alphanumeric string?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3090 beq LB844 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3091 jsr LB3A2 ; set carry if not alpha
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3092 bcc LB852 ; brif alpha
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3093 cmpa #'0 ; is it below the digits?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3094 blo LB842 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3095 cmpa #'9 ; is it within the digits?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3096 bls LB852 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3097 LB842 clr V43 ; flag that we're past the alphanumeric string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3098 LB844 cmpa #0x20 ; space?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3099 beq LB852 ; brif so - keep it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3100 sta V42 ; save scan delimiter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3101 cmpa #'" ; string delimiter?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3102 beq LB886 ; brif so - copy until another "
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3103 tst V44 ; doing "DATA"?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3104 beq LB86B ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3105 LB852 sta ,u+ ; put character in output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3106 beq LB85C ; brif end of input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3107 cmpa #': ; colon?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3108 beq LB829 ; brif so - reset DATA and alpha string flags
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3109 LB85A bra LB82D ; go process another input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3110 LB85C clr ,u+ ; put a double NUL at the end
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3111 clr ,u+
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3112 tfr u,d ; calculate length of result (includes double NUL and an extra two bytes)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3113 subd #LINHDR
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3114 ldx #LINBUF-1 ; point to one before the output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3115 stx CHARAD ; set input pointer there
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3116 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3117 LB86B cmpa #'? ; print abbreviation?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3118 bne LB873 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3119 lda #0x87 ; token for PRINT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3120 bra LB852 ; go stash it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3121 LB873 cmpa #'' ; REM abbreviation?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3122 bne LB88A ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3123 ldd #0x3a83 ; colon plus ' token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3124 std ,u++ ; put it in the output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3125 LB87C clr V42 ; set delimiter to NUL
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3126 LB87E lda ,x+ ; get input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3127 beq LB852 ; brif end of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3128 cmpa V42 ; at the delimiter?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3129 beq LB852 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3130 LB886 sta ,u+ ; save in output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3131 bra LB87E ; keep scanning for delimiter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3132 LB88A cmpa #'0 ; is it below digits?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3133 blo LB892 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3134 cmpa #';+1 ; is it digit, colon, or semicolon?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3135 blo LB852 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3136 LB892 leax -1,x ; move input pointer back one (to point at this input character)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3137 pshs u,x ; save input and output pointers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3138 clr V41 ; set token type to 0 (command)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3139 ldu #COMVEC-10 ; point to command interpretation table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3140 LB89B clr V42 ; set token counter to 0 (0x80)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3141 LB89D leau 10,u ;
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3142 lda ,u ; get number of reserved words
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3143 beq LB8D4 ; brif this table isn't active
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3144 ldy 1,u ; point to reserved words list
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3145 LB8A6 ldx ,s ; get input pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3146 LB8A8 ldb ,y+ ; get character from reserved word table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3147 subb ,x+ ; compare with input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3148 beq LB8A8 ; brif exact match
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3149 cmpb #0x80 ; brif it was the last character in word and exact match
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3150 bne LB8EA ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3151 leas 2,s ; remove original input pointer from stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3152 puls u ; get back output pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3153 orb V42 ; create token value (B has 0x80 from above)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3154 lda V41 ; get token type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3155 bne LB8C2 ; brif function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3156 cmpb #0x84 ; is it ELSE?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3157 bne LB8C6 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3158 lda #': ; silently add a colon before ELSE
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3159 LB8C2 std ,u++ ; put two byte token into output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3160 bra LB85A ; go handle more input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3161 LB8C6 stb ,u+ ; save single byte token
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3162 cmpb #0x86 ; DATA?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3163 bne LB8CE ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3164 inc V44 ; set DATA flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3165 LB8CE cmpb #0x82 ; REM?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3166 beq LB87C ; brif so - skip over rest of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3167 LB8D2 bra LB85A ; go handle more input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3168 LB8D4 ldu #COMVEC-5 ; point to interpretation table, function style
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3169 LB8D7 com V41 ; invert token flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3170 bne LB89B ; brif we haven't already done functions
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3171 puls x,u ; restore input and output pointers
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3172 lda ,x+ ; copy first character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3173 sta ,u+
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3174 jsr LB3A2 ; set C if not alpha
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3175 bcs LB8D2 ; brif not alpha - it isn't a variable
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3176 com V43 ; set alphanumeric string flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3177 bra LB8D2 ; process more input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3178 LB8EA inc V42 ; bump token number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3179 deca ; checked all in this table?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3180 beq LB89D ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3181 leay -1,y ; unconsume last compared character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3182 LB8F1 ldb ,y+ ; end of entry?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3183 bpl LB8F1 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3184 bra LB8A6 ; check next reserved word
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3185 ; PRINT command
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3186 PRINT beq LB958 ; brif no argument - do a newline
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3187 bsr LB8FE ; process print options
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3188 clr DEVNUM ; reset output to screen
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3189 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3190 LB8FE cmpa #'@ ; is it PRINT @?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3191 bne LB907 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3192 jsr LA554 ; move cursor to correct location
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3193 bra LB911 ; handle some more
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3194 LB907 cmpa #'# ; device number specified?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3195 bne LB918 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3196 jsr LA5A5 ; parse device number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3197 jsr LA406 ; check for valid output file
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3198 LB911 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3199 beq LB958 ; brif nothing - do newline
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3200 jsr LB26D ; need comma after @ or #
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3201 LB918 jsr RVEC9 ; do the RAM hook boogaloo
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3202 LB91B beq LB965 ; brif end of input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3203 LB91D cmpa #0xa4 ; TAB(?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3204 beq LB97E ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3205 cmpa #', ; comma (next tab field)?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3206 beq LB966 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3207 cmpa #'; ; semicolon (do not advance print position)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3208 beq LB997 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3209 jsr LB156 ; evaluate expression
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3210 lda VALTYP ; get type of value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3211 pshs a ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3212 bne LB938 ; brif string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3213 jsr LBDD9 ; convert FP number to string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3214 jsr LB516 ; parse a string and put on string stack
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3215 LB938 bsr LB99F ; print string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3216 puls b ; get back variable type
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3217 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3218 tst PRTDEV ; is it a display device?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3219 beq LB949 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3220 bsr LB958 ; do a newline
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3221 jsr GETCCH ; get input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3222 bra LB91B ; process more print stuff
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3223 LB949 tstb ; set flags on print position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3224 bne LB954 ; brif not at start of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3225 jsr GETCCH ; get current input
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3226 cmpa #', ; comma?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3227 beq LB966 ; skip to next tab field if so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3228 bsr LB9AC ; send a space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3229 LB954 jsr GETCCH ; get input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3230 bne LB91D ; brif not end of statement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3231 LB958 lda #0x0d ; carriage return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3232 bra LB9B1 ; send it to output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3233 LB95C jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3234 LB95F beq LB958 ; brif width is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3235 lda DEVPOS ; get line position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3236 bne LB958 ; brif not at start of line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3237 LB965 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3238 LB966 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3239 beq LB975 ; brif line width is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3240 ldb DEVPOS ; get line position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3241 cmpb DEVLCF ; at or past last comma field?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3242 blo LB977 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3243 bsr LB958 ; move to next line
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3244 bra LB997 ; handle more stuff
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3245 LB975 ldb DEVPOS ; get line position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3246 LB977 subb DEVCFW ; subtract a comma field width
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3247 bhs LB977 ; brif we don't have a remainder yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3248 negb ; now B is number of of spaces needed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3249 bra LB98E ; go advance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3250 LB97E jsr LB709 ; evaluate TAB distance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3251 cmpa #') ; closing )?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3252 lbne LB277 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3253 jsr LA35F ; set up print parameters
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3254 subb DEVPOS ; subtract print position from desired position
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3255 bls LB997 ; brif we're already past it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3256 LB98E tst PRTDEV ; is it a display device?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3257 bne LB997 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3258 LB992 bsr LB9AC ; output a space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3259 decb ; done enough?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3260 bne LB992 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3261 LB997 jsr GETNCH ; get input character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3262 jmp LB91B ; process more items
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3263 ; cpoy string from (X-1) to output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3264 LB99C jsr LB518 ; parse the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3265 LB99F jsr LB657 ; get string details
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3266 LB9A2 incb ; compensate for decb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3267 LB9A3 decb ; done all of the string?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3268 beq LB965 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3269 lda ,x+ ; get character from string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3270 bsr LB9B1 ; send to output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3271 bra LB9A3 ; go do another character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3272 LB9AC lda #0x20 ; space character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3273 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3274 LB9AF lda #'? ; question mark character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3275 LB9B1 jmp PUTCHR ; output character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3276 ; The floating point math package and related functions and operations follow from here
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3277 ; to the end of the Color Basic ROM area
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3278 LB9B4 ldx #LBEC0 ; point to FP constant 0.5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3279 bra LB9C2 ; add 0.5 to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3280 LB9B9 jsr LBB2F ; unpack FP data from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3281 ; subtraction operator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3282 LB9BC com FP0SGN ; invert sign of FPA0 (subtracting is adding the negative)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3283 com RESSGN ; that also inverts the sign differential
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3284 bra LB9C5 ; go add the negative of FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3285 LB9C2 jsr LBB2F ; unpack FP data from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3286 ; addition operator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3287 LB9C5 tstb ; check exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3288 lbeq LBC4A ; copy FPA1 to FPA0 if FPA0 is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3289 ldx #FP1EXP ; point X to FPA1 (first operand) as the operand to denormalize
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3290 LB9CD tfr a,b ; put exponent of FPA1 into B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3291 tstb ; is FPA1 0?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3292 beq LBA3E ; brif exponent is 0 - no-op; adding 0 to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3293 subb FP0EXP ; get difference in exponents - number of bits to shift the smaller mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3294 beq LBA3F ; brif exponents are equal - no need to denormalize
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3295 bmi LB9E2 ; brif FPA0 > FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3296 sta FP0EXP ; replace result exponent with FPA1's (FPA1 is bigger)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3297 lda FP1SGN ; also copy sign over
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3298 sta FP0SGN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3299 ldx #FP0EXP ; point to FPA0 (we need to denormalize the smaller number)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3300 negb ; invert the difference - this is the number of bits to shift the mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3301 LB9E2 cmpb #-8 ; do we have to shift by a whole byte?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3302 ble LBA3F ; brif so start by shifting whole bytes to the right
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3303 clra ; clear overflow byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3304 lsr 1,x ; shift high bit of mantissa right (LSR will force a zero into the high bit)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3305 jsr LBABA ; shift remainder of mantissa right -B times
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3306 LB9EC ldb RESSGN ; get the sign flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3307 bpl LB9FB ; brif signs are the same (we add the mantissas then)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3308 com 1,x ; complement the mantissa and extra precision bytes
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3309 com 2,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3310 com 3,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3311 com 4,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3312 coma
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3313 adca #0 ; add one to A (COM sets C); this may cause a carry to enter the ADD below
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3314 LB9FB sta FPSBYT ; save extra precision byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3315 lda FPA0+3 ; add the main mantissa bytes (and propage carry from above)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3316 adca FPA1+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3317 sta FPA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3318 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3319 adca FPA1+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3320 sta FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3321 lda FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3322 adca FPA1+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3323 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3324 lda FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3325 adca FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3326 sta FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3327 tstb ; were signs the same?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3328 bpl LBA5C ; brif so - number may have gotten bigger so normalize if needed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3329 LBA18 bcs LBA1C ; brif we had a carry - result is positive?)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3330 bsr LBA79 ; do a proper negation of FPA0 mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3331 LBA1C clrb ; clear temporary exponent accumulator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3332 LBA1D lda FPA0 ; test high byte of mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3333 bne LBA4F ; brif not 0 - we need to do bit shifting
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3334 lda FPA0+1 ; shift left 8 bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3335 sta FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3336 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3337 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3338 lda FPA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3339 sta FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3340 lda FPSBYT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3341 sta FPA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3342 clr FPSBYT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3343 addb #8 ; account for 8 bits shifted
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3344 cmpb #5*8 ; shifted 5 bytes worth?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3345 blt LBA1D ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3346 LBA39 clra ; zero out exponent and sign - result is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3347 LBA3A sta FP0EXP ; set exponent and sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3348 sta FP0SGN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3349 LBA3E rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3350 LBA3F bsr LBAAE ; shift FPA0 mantissa to the right
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3351 clrb ; clear carry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3352 bra LB9EC ; get on with adding
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3353 LBA44 incb ; account for one bit shift
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3354 asl FPSBYT ; shift mantissa and extra precision left
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3355 rol FPA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3356 rol FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3357 rol FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3358 rol FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3359 LBA4F bpl LBA44 ; brif we haven't got a 1 in bit 7
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3360 lda FP0EXP ; get exponent of result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3361 pshs b ; subtract shift count from exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3362 suba ,s+
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3363 sta FP0EXP ; save adjusted exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3364 bls LBA39 ; brif we underflowed - set result to 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3365 skip2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3366 LBA5C bcs LBA66 ; brif mantissa overflowed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3367 asl FPSBYT ; get bit 7 of expra precision to C (used for round off)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3368 lda #0 ; set to 0 without affecting C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3369 sta FPSBYT ; clear out extra precision bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3370 bra LBA72 ; go round off result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3371 LBA66 inc FP0EXP ; bump exponent (for a right shift to bring carry in)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3372 beq LBA92 ; brif we overflowed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3373 ror FPA0 ; shift carry into mantissa, shift right
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3374 ror FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3375 ror FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3376 ror FPA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3377 LBA72 bcc LBA78 ; brif no round-off needed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3378 bsr LBA83 ; add one to mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3379 beq LBA66 ; brif carry - need to shift right again
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3380 LBA78 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3381 LBA79 com FP0SGN ; invert sign of value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3382 LBA7B com FPA0 ; first do a one's copmlement
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3383 com FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3384 com FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3385 com FPA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3386 LBA83 ldx FPA0+2 ; add one to mantissa (after one's complement gives two's complement)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3387 leax 1,x ; bump low word
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3388 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3389 bne LBA91 ; brif no carry from low word
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3390 ldx FPA0 ; bump high word
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3391 leax 1,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3392 stx FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3393 LBA91 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3394 LBA92 ldb #2*5 ; code for overflow
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3395 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3396 LBA97 ldx #FPA2-1 ; point to FPA2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3397 LBA9A lda 4,x ; shift mantissa right by 8 bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3398 sta FPSBYT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3399 lda 3,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3400 sta 4,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3401 lda 2,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3402 sta 3,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3403 lda 1,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3404 sta 2,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3405 lda FPCARY ; and handle extra precision on the left
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3406 sta 1,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3407 LBAAE addb #8 ; account for 8 bits shifted
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3408 ble LBA9A ; brif more shifts needed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3409 lda FPSBYT ; get sub byte (extra precision)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3410 subb #8 ; undo the 8 added above
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3411 beq LBAC4 ; brif difference is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3412 LBAB8 asr 1,x ; shift mantissa and sub byte one bit (keep mantissa high bit set)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3413 LBABA ror 2,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3414 ror 3,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3415 ror 4,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3416 rora
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3417 incb ; account for one shift
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3418 bne LBAB8 ; brif not enought shifts yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3419 LBAC4 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3420 LBAC5 fcb 0x81,0x00,0x00,0x00,0x00 ; packed FP 1.0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3421 LBACA bsr LBB2F ; unpack FP value from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3422 ; multiplication operator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3423 LBACC beq LBB2E ; brif exponent of FPA0 is 0 (result is 0)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3424 bsr LBB48 ; calculate exponent of product
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3425 LBAD0 lda #0 ; zero out mantissa of FPA2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3426 sta FPA2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3427 sta FPA2+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3428 sta FPA2+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3429 sta FPA2+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3430 ldb FPA0+3 ; multiply FPA1 by LSB of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3431 bsr LBB00
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3432 ldb FPSBYT ; save extra precision byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3433 stb VAE
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3434 ldb FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3435 bsr LBB00 ; again for next byte of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3436 ldb FPSBYT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3437 stb VAD
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3438 ldb FPA0+1 ; again for next byte of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3439 bsr LBB00
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3440 ldb FPSBYT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3441 stb VAC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3442 ldb FPA0 ; and finally for the high byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3443 bsr LBB02
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3444 ldb FPSBYT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3445 stb VAB
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3446 jsr LBC0B ; copy mantissa from FPA2 to FPA0 (result)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3447 jmp LBA1C ; normalize
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3448 LBB00 beq LBA97 ; brif multiplier is 0 - just shift, don't multiply
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3449 LBB02 coma ; set carry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3450 LBB03 lda FPA2 ; get FPA2 MS byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3451 rorb ; data bit to carry; will be 0 when all shifts done
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3452 beq LBB2E ; brif 8 shifts done
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3453 bcc LBB20 ; brif data bit is 0 - no addition
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3454 lda FPA2+3 ; add mantissa of FPA1 and FPA2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3455 adda FPA1+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3456 sta FPA2+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3457 lda FPA2+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3458 adca FPA1+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3459 sta FPA2+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3460 lda FPA2+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3461 adca FPA1+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3462 sta FPA2+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3463 lda FPA2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3464 adca FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3465 LBB20 rora ; shift carry into FPA2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3466 sta FPA2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3467 ror FPA2+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3468 ror FPA2+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3469 ror FPA2+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3470 ror FPSBYT
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3471 clra ; clear carry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3472 bra LBB03
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3473 LBB2E rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3474 ; Unpack FP value from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3475 LBB2F ldd 1,x ; copy mantissa (and sign)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3476 sta FP1SGN ; save sign bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3477 ora #0x80 ; make sure mantissa has bit 7 set
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3478 std FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3479 ldb FP1SGN ; get sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3480 eorb FP0SGN ; set if FPA0 sign differs
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3481 stb RESSGN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3482 ldd 3,x ; copy remainder of mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3483 std FPA1+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3484 lda ,x ; and exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3485 sta FP1EXP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3486 ldb FP0EXP ; fetch FPA0 exponent and set flags
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3487 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3488 ; Calculate eponent for product of FPA0 and FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3489 LBB48 tsta ; is FPA1 zero?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3490 beq LBB61 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3491 adda FP0EXP ; add to exponent of FPA0 (this is how scientific notation works)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3492 rora ; set V if we *don't* have an overflow
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3493 rola
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3494 bvc LBB61 ; brif exponent too larger or small
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3495 adda #0x80 ; restore the bias
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3496 sta FP0EXP ; set result exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3497 beq LBB63 ; brif 0 - clear FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3498 lda RESSGN ; the result sign (negative if signs differ) is the result sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3499 sta FP0SGN ; so set it as such
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3500 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3501 LBB5C lda FP0SGN ; get sign of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3502 coma ; invert sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3503 bra LBB63 ; zero sign and exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3504 LBB61 leas 2,s ; don't go back to caller (mul/div) - return to previous caller
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3505 LBB63 lbpl LBA39 ; brif we underflowed - go zero things out
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3506 LBB67 jmp LBA92 ; raise overflow error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3507 ; fast multiply by 10 - leave result in FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3508 LBB6A jsr LBC5F ; copy FPA0 to FPA1 (for addition later)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3509 beq LBB7C ; brif exponent is 0 - it's a no-op then
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3510 adda #2 ; this gives "times 4"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3511 bcs LBB67 ; raise overflow if required
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3512 clr RESSGN ; set result sign to "signs the same"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3513 jsr LB9CD ; add FPA1 to FPA0 "times 5"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3514 inc FP0EXP ; times 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3515 beq LBB67 ; brif overflow
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3516 LBB7C rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3517 LBB7D fcb 0x84,0x20,0x00,0x00,0x00 ; packed FP constant 10.0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3518 ; Divide by 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3519 LBB82 jsr LBC5F ; move FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3520 ldx #LBB7D ; point to constant 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3521 clrb ; zero sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3522 LBB89 stb RESSGN ; result will be positive or zero
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3523 jsr LBC14 ; unpack constant 10 to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3524 skip2 ; fall through to division (divide FPA1 by 10)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3525 LBB8F bsr LBB2F ; unpack FP number from (X) to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3526 ; division operator
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3527 LBB91 beq LBC06 ; brif FPA0 is 0 - division by zero
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3528 neg FP0EXP ; get exponent of reciprocal of the divisor
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3529 bsr LBB48 ; calculate exponent of quotient
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3530 inc FP0EXP ; bump exponent (due to division algorithm below)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3531 beq LBB67 ; brif overflow
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3532 ldx #FPA2 ; point to temporary storage location
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3533 ldb #4 ; do 5 bytes
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3534 stb TMPLOC ; save counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3535 ldb #1 ; shift counter and quotient byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3536 LBBA4 lda FPA0 ; compare mantissa of FPA0 to FPA1, set C if FPA1 less
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3537 cmpa FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3538 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3539 lda FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3540 cmpa FPA1+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3541 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3542 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3543 cmpa FPA1+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3544 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3545 lda FPA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3546 cmpa FPA1+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3547 bne LBBBD
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3548 coma ; set C if FPA0 = FPA1 (it "goes")
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3549 LBBBD tfr cc,a ; save "it goes" status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3550 rolb ; rotate carry into quotient
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3551 bcc LBBCC ; brif carry clear - haven't done 8 shifts yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3552 stb ,x+ ; save quotient byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3553 dec TMPLOC ; done enough bytes?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3554 bmi LBBFC ; brif done all 5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3555 beq LBBF8 ; brif last byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3556 ldb #1 ; reset shift counter and quotient byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3557 LBBCC tfr a,cc ; get back carry status
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3558 bcs LBBDE ; brif it "went"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3559 LBBD0 asl FPA1+3 ; shift mantissa (dividend) left
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3560 rol FPA1+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3561 rol FPA1+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3562 rol FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3563 bcs LBBBD ; brif carry - it "goes" so we have to bump quotient
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3564 bmi LBBA4 ; brif high order bit is set - compare mantissas
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3565 bra LBBBD ; otherwise, count a 0 bit and try next bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3566 LBBDE lda FPA1+3 ; subtract mantissa of FPA0 from mantissa of FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3567 suba FPA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3568 sta FPA1+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3569 lda FPA1+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3570 sbca FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3571 sta FPA1+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3572 lda FPA1+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3573 sbca FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3574 sta FPA1+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3575 lda FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3576 sbca FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3577 sta FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3578 bra LBBD0 ; go check for another go
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3579 LBBF8 ldb #0x40 ; only two bits in last byte (for rounding)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3580 bra LBBCC ; go do the last byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3581 LBBFC rorb ; get low bits to bits 7,6 and C to bit 5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3582 rorb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3583 rorb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3584 stb FPSBYT ; save result extra precision
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3585 bsr LBC0B ; move FPA2 mantissa to FPA0 (result)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3586 jmp LBA1C ; go normalize the result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3587 LBC06 ldb #2*10 ; division by zero
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3588 jmp LAC46 ; raise error
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3589 ; Copy mantissa of FPA2 to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3590 LBC0B ldx FPA2 ; copy high word
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3591 stx FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3592 ldx FPA2+2 ; copy low word
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3593 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3594 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3595 ; unpack FP number at (X) to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3596 LBC14 pshs a ; save register
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3597 ldd 1,x ; get mantissa high word and sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3598 sta FP0SGN ; set sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3599 ora #0x80 ; make sure mantissa always has bit 7 set
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3600 std FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3601 clr FPSBYT ; clear extra precision
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3602 ldb ,x ; get exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3603 ldx 3,x ; copy mantissa low word
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3604 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3605 stb FP0EXP ; save exponent (and set flags)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3606 puls a,pc ; restore register and return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3607 LBC2A ldx #V45 ; point to FPA4
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3608 bra LBC35 ; pack FPA0 there
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3609 LBC2F ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3610 skip2 ; fall through to pack FPA0 there
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3611 LBC33 ldx VARDES ; get variable descriptor pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3612 ; Pack FPA0 to (X)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3613 LBC35 lda FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3614 sta ,x ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3615 lda FP0SGN ; get sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3616 ora #0x7f ; force set low bits - only keep sign in high bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3617 anda FPA0 ; merge in bits 6-0 of high byte of mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3618 sta 1,x ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3619 lda FPA0+1 ; copy next highest byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3620 sta 2,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3621 ldu FPA0+2 ; and the low word of the mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3622 stu 3,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3623 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3624 ; Copy FPA1 to FPA0; return with sign in A
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3625 LBC4A lda FP1SGN ; copy sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3626 LBC4C sta FP0SGN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3627 ldx FP1EXP ; copy exponent, mantissa high byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3628 stx FP0EXP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3629 clr FPSBYT ; clear extra precision
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3630 lda FPA1+1 ; copy mantissa second highest byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3631 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3632 lda FP0SGN ; set sign for return
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3633 ldx FPA1+2 ; copy low word of mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3634 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3635 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3636 ; Copy FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3637 LBC5F ldd FP0EXP ; copy exponent and high byte of mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3638 std FP1EXP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3639 ldx FPA0+1 ; copy middle bytes of mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3640 stx FPA1+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3641 ldx FPA0+3 ; copy low byte of mantissa and sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3642 stx FPA1+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3643 tsta ; set flags on exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3644 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3645 ; check FPA0: return B = 0, if FPA0 is 0, 0xff if negative, and 0x01 if positive
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3646 LBC6D ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3647 beq LBC79 ; brif 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3648 LBC71 ldb FP0SGN ; get sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3649 LBC73 rolb ; get sign to C
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3650 ldb #0xff ; set for negative result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3651 bcs LBC79 ; brif negative
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3652 negb ; set to 1 for positive
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3653 LBC79 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3654 ; SGN function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3655 SGN bsr LBC6D ; get sign of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3656 LBC7C stb FPA0 ; save result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3657 clr FPA0+1 ; clear next lower 8 bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3658 ldb #0x88 ; exponent if mantissa is 8 bit integer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3659 LBC82 lda FPA0 ; get high bits of mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3660 suba #0x80 ; set C if mantissa was positive (will cause a negation if it was negative)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3661 LBC86 stb FP0EXP ; set exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3662 ldd ZERO ; clear out low word
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3663 std FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3664 sta FPSBYT ; clear extra precision
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3665 sta FP0SGN ; set sign to positive
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3666 jmp LBA18 ; normalize the result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3667 ; ABS function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3668 ABS clr FP0SGN ; force FPA0 to be positive (yes, it's that simple)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3669 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3670 ; Compare packed FP number at (X) to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3671 ; Return with B = -1, 0, 1 for FPA0 <, =, > (X) and flags set based on that
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3672 LBC96 ldb ,x ; get exponent of (X)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3673 beq LBC6D ; brif (X) is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3674 ldb 1,x ; get MS byte of mantissa of (X)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3675 eorb FP0SGN ; set bit 7 if signs of (X) and FPA0 differ
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3676 bmi LBC71 ; brif signs differ - no need to compare the magnitude
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3677 LBCA0 ldb FP0EXP ; compare exponents and brif different
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3678 cmpb ,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3679 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3680 ldb 1,x ; compare mantissa (but we have to pack the FPA0 bits first
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3681 orb #0x7f ; keep only sign bit (note: signs are the same)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3682 andb FPA0 ; merge in the mantissa bits from FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3683 cmpb 1,x ; do the packed versions match?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3684 bne LBCC3 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3685 ldb FPA0+1 ; compare second byte of mantissas
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3686 cmpb 2,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3687 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3688 ldb FPA0+2 ; compare third byte of mantissas
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3689 cmpb 3,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3690 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3691 ldb FPA0+3 ; compare low byte of mantissas, but use subtraction so B = 0 on match
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3692 subb 4,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3693 bne LBCC3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3694 rts ; return B = 0 if (X) = FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3695 LBCC3 rorb ; shift carry to bit 7 (C set if FPA0 < (X))
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3696 eorb FP0SGN ; invert the comparision sense if the signs are negative
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3697 bra LBC73 ; interpret comparison result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3698 ; Shift mantissa of FPA0 until the binary point is immediately to the right of the mantissa and set up the
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3699 ; result as a two's complement value.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3700 LBCC8 ldb FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3701 beq LBD09 ; brif FPA0 is zero - we don't have to do anything, just blank it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3702 subb #0xa0 ; calculate number of shifts to get to the correct exponent (binary point to the right)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3703 lda FP0SGN ; do we have a positive number?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3704 bpl LBCD7 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3705 com FPCARY ; negate the mantissa and set extra inbound precision to the correct sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3706 jsr LBA7B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3707 LBCD7 ldx #FP0EXP ; point to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3708 cmpb #-8 ; moving by whole bytes?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3709 bgt LBCE4 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3710 jsr LBAAE ; do bit shifting
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3711 clr FPCARY ; clear carry in byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3712 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3713 LBCE4 clr FPCARY ; clear the extra carry in precision
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3714 lda FP0SGN ; get sign of value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3715 rola ; get sign to carry (so rotate repeats the sign)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3716 ror FPA0 ; shift the first bit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3717 jmp LBABA ; do the shifting dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3718 ; INT function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3719 INT ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3720 cmpb #0xa0 ; is the number big enough that there can be no fractional part?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3721 bhs LBD11 ; brif so - we don't have to do anything
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3722 bsr LBCC8 ; go shift binary point to the right of the mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3723 stb FPSBYT ; save extra precision bits
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3724 lda FP0SGN ; get original sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3725 stb FP0SGN ; force result to be positive
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3726 suba #0x80 ; set C if we had a positive result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3727 lda #0xa0 ; set exponent to match denormalized result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3728 sta FP0EXP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3729 lda FPA0+3 ; save low byte
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3730 sta CHARAC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3731 jmp LBA18 ; go normalize (this will correct for the two's complement representation of negatives)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3732 LBD09 stb FPA0 ; replace mantissa of FPA0 with contents of B
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3733 stb FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3734 stb FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3735 stb FPA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3736 LBD11 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3737 ; Convert ASCII string to FP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3738 ; BUG: no overflow is checked on the decimal exponent in exponential notation.
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3739 LBD12 ldx ZERO ; zero out FPA0 and temporaries
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3740 stx FP0SGN
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3741 stx FP0EXP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3742 stx FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3743 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3744 stx V47
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3745 stx V45
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3746 bcs LBD86 ; brif input character is numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3747 jsr RVEC19 ; do the RAM hook dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3748 cmpa #'- ; regular negative sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3749 bne LBD2D ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3750 com COEFCT ; invert sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3751 bra LBD31 ; process stuff after the sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3752 LBD2D cmpa #'+ ; regular plus?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3753 bne LBD35 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3754 LBD31 jsr GETNCH ; get character after sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3755 bcs LBD86 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3756 LBD35 cmpa #'. ; decimal point?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3757 beq LBD61 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3758 cmpa #'E ; scientific notation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3759 bne LBD65 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3760 jsr GETNCH ; eat the "E"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3761 bcs LBDA5 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3762 cmpa #0xac ; negative sign (token)?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3763 beq LBD53 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3764 cmpa #'- ; regular negative?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3765 beq LBD53 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3766 cmpa #0xab ; plus sign (token)?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3767 beq LBD55 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3768 cmpa #'+ ; regular plus?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3769 beq LBD55
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3770 bra LBD59 ; brif no sign found
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3771 LBD53 com V48 ; set exponent sign to negative
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3772 LBD55 jsr GETNCH ; eat the sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3773 bcs LBDA5 ; brif numeric
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3774 LBD59 tst V48 ; is the exponent sign negatvie?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3775 beq LBD65 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3776 neg V47 ; negate base 10 exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3777 bra LBD65
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3778 LBD61 com V46 ; toggle decimal point flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3779 bne LBD31 ; brif we haven't seen two decimal points
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3780 LBD65 lda V47 ; get base 10 exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3781 suba V45 ; subtract number of places to the right
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3782 sta V47 ; we now have a complete decimal exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3783 beq LBD7F ; brif we have no base 10 shifting required
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3784 bpl LBD78 ; brif positive exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3785 LBD6F jsr LBB82 ; divide FPA0 by 10 (shift decimal point left)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3786 inc V47 ; bump exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3787 bne LBD6F ; brif we haven't reached 0 yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3788 bra LBD7F ; return result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3789 LBD78 jsr LBB6A ; multiply by 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3790 dec V47 ; downshift the exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3791 bne LBD78 ; brif not at 0 yet
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3792 LBD7F lda COEFCT ; get desired sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3793 bpl LBD11 ; brif it will be positive - no need to do anything
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3794 jmp LBEE9 ; flip the sign of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3795 LBD86 ldb V45 ; get the decimal count
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3796 subb V46 ; (if decimal seen, will add one; otherwise it does nothing)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3797 stb V45
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3798 pshs a ; save new digit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3799 jsr LBB6A ; multiply partial result by 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3800 puls b ; get back digit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3801 subb #'0 ; remove ASCII bias
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3802 bsr LBD99 ; add B to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3803 bra LBD31 ; go process another digit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3804 LBD99 jsr LBC2F ; save FPA0 to FPA3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3805 jsr LBC7C ; convert B to FP number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3806 ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3807 jmp LB9C2 ; add FPA3 and FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3808 LBDA5 ldb V47 ; get exponent value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3809 aslb ; times 2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3810 aslb ; times 4
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3811 addb V47 ; times 5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3812 aslb ; times 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3813 suba #'0 ; remove ASCII bias
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3814 pshs b ; save acculated result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3815 adda ,s+ ; add new digit to accumulated result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3816 sta V47 ; save new accumulated decimal exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3817 bra LBD55 ; interpret another exponent character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3818 LBDB6 fcb 0x9b,0x3e,0xbc,0x1f,0xfd ; packed FP: 99999999.9
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3819 LBDBB fcb 0x9e,0x6e,0x6b,0x27,0xfd ; packed FP: 999999999
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3820 LBDC0 fcb 0x9e,0x6e,0x6b,0x28,0x00 ; pakced FP: 1E9
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3821 LBDC5 ldx #LABE8-1 ; point to "IN" message
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3822 bsr LBDD6 ; output the string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3823 ldd CURLIN ; get basic line number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3824 LBDCC std FPA0 ; save 16 bit unsigned integer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3825 ldb #0x90 ; exponent for upper 16 bits of FPA0 to be an integer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3826 coma ; set C (force normalization to treat as positive)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3827 jsr LBC86 ; zero bottom half, save exponent, and normalize
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3828 bsr LBDD9 ; convert FP number to ASCII string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3829 LBDD6 jmp LB99C ; output string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3830 ; Convert FP number to ASCII string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3831 LBDD9 ldu #STRBUF+3 ; point to buffer address that will not cause string to go to string space
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3832 LBDDC lda #0x20 ; default sign is a space character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3833 ldb FP0SGN ; get sign of value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3834 bpl LBDE4 ; brif positive
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3835 lda #'- ; use negative sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3836 LBDE4 sta ,u+ ; save sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3837 stu COEFPT ; save output buffer pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3838 sta FP0SGN ; save sign character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3839 lda #'0 ; result is 0 if exponent is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3840 ldb FP0EXP ; get exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3841 lbeq LBEB8 ; brif FPA0 is 0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3842 clra ; base 10 exponent is 0 for > 1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3843 cmpb #0x80 ; is number > 1?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3844 bhi LBDFF ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3845 ldx #LBDC0 ; point to 1E+09
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3846 jsr LBACA ; shift decimal to the right by 9 spaces
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3847 lda #-9 ; account for shift
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3848 LBDFF sta V45 ; save base 10 exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3849 LBE01 ldx #LBDBB ; point to 999999999
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3850 jsr LBCA0 ; are we above that?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3851 bgt LBE18 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3852 LBE09 ldx #LBDB6 ; point to 99999999.9
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3853 jsr LBCA0 ; are we above that?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3854 bgt LBE1F ; brif in range
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3855 jsr LBB6A ; multiply by 10 (we were small)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3856 dec V45 ; account for shift
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3857 bra LBE09 ; see if we've come into range
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3858 LBE18 jsr LBB82 ; divide by 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3859 inc V45 ; account for shift
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3860 bra LBE01 ; see if we've come into range
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3861 LBE1F jsr LB9B4 ; add 0.5 to FPA0 (rounding)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3862 jsr LBCC8 ; do the integer dance
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3863 ldb #1 ; default decimal flag (force immediate decimal)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3864 lda V45 ; get base 10 exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3865 adda #10 ; account for "unormalized" number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3866 bmi LBE36 ; brif number < 1.0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3867 cmpa #11 ; do we have more than 9 places?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3868 bhs LBE36 ; brif so - do scientific notation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3869 deca
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3870 tfr a,b
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3871 lda #2 ; force no scientific notation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3872 LBE36 deca ; subtract wo without affecting carry
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3873 deca
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3874 sta V47 ; save exponent - 0 is do not display in scientific notation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3875 stb V45 ; save number of places to left of decimal
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3876 bgt LBE4B ; brif >= 1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3877 ldu COEFPT ; point to string buffer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3878 lda #'. ; put decimal
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3879 sta ,u+
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3880 tstb ; is there anything to left of decimal?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3881 beq LBE4B ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3882 lda #'0 ; store a zero
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3883 sta ,u+
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3884 LBE4B ldx #LBEC5 ; point to powers of 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3885 ldb #0x80 ; set digit counter to 0x80
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3886 LBE50 lda FPA0+3 ; add mantissa to power of 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3887 adda 3,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3888 sta FPA0+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3889 lda FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3890 adca 2,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3891 sta FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3892 lda FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3893 adca 1,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3894 sta FPA0+1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3895 lda FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3896 adca ,x
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3897 sta FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3898 incb ; add one to digit counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3899 rorb ; put carry into bit 7
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3900 rolb ; set V if carry and sign differ
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3901 bvc LBE50 ; brif positive mantissa or carry is 0 and negative mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3902 bcc LBE72 ; brif negative mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3903 subb #10+1 ; take 9's complement if adding mantissa
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3904 negb
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3905 LBE72 addb #'0-1 ; add ASCII bias
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3906 leax 4,x ; move to next power of 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3907 tfr b,a ; save digit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3908 anda #0x7f ; remove add/subtract flag
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3909 sta ,u+ ; put in output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3910 dec V45 ; do we need a decimal yet?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3911 bne LBE84 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3912 lda #'. ; put decimal
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3913 sta ,u+
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3914 LBE84 comb ; toggle bit 7 (add/sub flag)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3915 andb #0x80 ; only keep bit 7
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3916 cmpx #LBEC5+9*4 ; done all places?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3917 bne LBE50 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3918 LBE8C lda ,-u ; get last character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3919 cmpa #'0 ; was it 0?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3920 beq LBE8C ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3921 cmpa #'. ; decimal?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3922 bne LBE98 ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3923 leau -1,u ; move past decimal if it isn't needed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3924 LBE98 lda #'+ ; plus sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3925 ldb V47 ; get scientific notation exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3926 beq LBEBA ; brif not scientific notation
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3927 bpl LBEA3 ; brif positive exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3928 lda #'- ; negative sign for base 10 exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3929 negb ; switch to positive exponent
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3930 LBEA3 sta 2,u ; put sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3931 lda #'E ; put "E"
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3932 sta 1,u
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3933 lda #'0-1 ; init to ASCII 0 (compensate for INC)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3934 LBEAB inca ; bump digit
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3935 subb #10 ; have we hit the correct one yet?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3936 bcc LBEAB ; brif not
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3937 addb #'9+1 ; convert units digit to ASCII
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3938 std 3,u ; put exponent in output
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3939 clr 5,u ; put trailing NUL
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3940 bra LBEBC ; go reset pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3941 LBEB8 sta ,u ; store last character
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3942 LBEBA clr 1,u ; put NUL at the end
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3943 LBEBC ldx #STRBUF+3 ; point to start of string
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3944 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3945 LBEC0 fcb 0x80,0x00,0x00,0x00,0x00 ; packed FP 0.5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3946 LBEC5 fqb -100000000
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3947 fqb 10000000
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3948 fqb -1000000
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3949 fqb 100000
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3950 fqb -10000
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3951 fqb 1000
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3952 fqb -100
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3953 fqb 10
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3954 fqb -1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3955 LBEE9 lda FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3956 beq LBEEF ; brif 0 - don't flip sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3957 com FP0SGN ; flip sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3958 LBEEF rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3959 ; Expand a polynomial of the form
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3960 ; AQ+BQ^3+CQ^5+DQ^7..... where Q is FPA0 and X points to a table
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3961 LBEF0 stx COEFPT ; save coefficient table pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3962 jsr LBC2F ; copy FPA0 to FPA3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3963 bsr LBEFC ; multiply FPA3 by FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3964 bsr LBF01 ; expand polynomial
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3965 ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3966 LBEFC jmp LBACA ; multiply FPA0 by FPA3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3967 LBEFF stx COEFPT ; save coefficient table counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3968 LBF01 jsr LBC2A ; move FPA0 to FPA4
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3969 ldx COEFPT ; get the current coefficient
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3970 ldb ,x+ ; get the number of entries
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3971 stb COEFCT ; save as counter
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3972 stx COEFPT ; save new pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3973 LBF0C bsr LBEFC ; multiply (X) and FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3974 ldx COEFPT ; get this coefficient
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3975 leax 5,x ; move to next one
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3976 stx COEFPT ; save new pointer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3977 jsr LB9C2 ; add (X) to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3978 ldx #V45 ; point X to FPA4
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3979 dec COEFCT ; done all coefficients?
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3980 bne LBF0C ; brif more left
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3981 rts
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3982 ; RND function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3983 RND jsr LBC6D ; set flags on FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3984 bmi LBF45 ; brif negative - set seed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3985 beq LBF3B ; brif 0 - do random between 0 and 1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3986 bsr LBF38 ; convert to integer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3987 jsr LBC2F ; save range value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3988 bsr LBF3B ; get random number
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3989 ldx #V40 ; point to FPA3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3990 bsr LBEFC ; multply (X) by FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3991 ldx #LBAC5 ; point to FP 1.0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3992 jsr LB9C2 ; add 1 to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3993 LBF38 jmp INT ; return integer value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3994 LBF3B ldx RVSEED+1 ; move variable random number seed to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3995 stx FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3996 ldx RVSEED+3
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3997 stx FPA0+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3998 LBF45 ldx RSEED ; move fixed seed to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
3999 stx FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4000 ldx RSEED+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4001 stx FPA1+2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4002 jsr LBAD0 ; multiply them
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4003 ldd VAD ; get lowest order product bytes
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4004 addd #0x658b ; add a constant
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4005 std RVSEED+3 ; save it as new seed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4006 std FPA0+2 ; save in result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4007 ldd VAB ; get high order extra product bytes
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4008 adcb #0xb0 ; add upper bytes of constant
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4009 adca #5
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4010 std RVSEED+1 ; save as new seed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4011 std FPA0 ; save as result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4012 clr FP0SGN ; set result to positive
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4013 lda #0x80 ; set exponent to 0 < FPA0 < 1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4014 sta FP0EXP
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4015 lda FPA2+2 ; get a byte from FPA2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4016 sta FPSBYT ; save as extra precision
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4017 jmp LBA1C ; go normalize FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4018 RSEED fqb 0x40e64dab ; constant random number generator seed
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4019 ; SIN function
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4020 SIN jsr LBC5F ; copy FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4021 ldx #LBFBD ; point to 2*pi
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4022 ldb FP1SGN ; get sign of FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4023 jsr LBB89 ; divide FPA0 by 2*pi
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4024 jsr LBC5F ; copy FPA0 to FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4025 bsr LBF38 ; convert FPA0 to an integer
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4026 clr RESSGN ; set result to positive
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4027 lda FP1EXP ; get exponent of FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4028 ldb FP0EXP ; get exponent of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4029 jsr LB9BC ; subtract FPA0 from FPA1
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4030 ldx #LBFC2 ; point to FP 0.25
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4031 jsr LB9B9 ; subtract FPA0 from 0.25 (pi/2)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4032 lda FP0SGN ; get result sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4033 pshs a ; save it
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4034 bpl LBFA6 ; brif positive
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4035 jsr LB9B4 ; add 0.5 (pi) to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4036 lda FP0SGN ; get sign of result
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4037 bmi LBFA9 ; brif negative
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4038 com RELFLG ; if 3pi/2 >= arg >= pi/2
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4039 LBFA6 jsr LBEE9 ; flip sign of FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4040 LBFA9 ldx #LBFC2 ; point to 0.25
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4041 jsr LB9C2 ; add 0.25 (pi/2) to FPA0
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4042 puls a ; get original sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4043 tsta ; was it positive
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4044 bpl LBFB7 ; brif so
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4045 jsr LBEE9 ; flip result sign
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4046 LBFB7 ldx #LBFC7 ; point to series coefficients
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4047 jmp LBEF0 ; go calculate value
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4048 LBFBD fcb 0x83,0x49,0x0f,0xda,0xa2 ; 2*pi
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4049 LBFC2 fcb 0x7f,0x00,0x00,0x00,0x00 ; 0.25
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4050 ; modified taylor series SIN coefficients
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4051 LBFC7 fcb 6-1 ; six coefficients
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4052 fcb 0x84,0xe6,0x1a,0x2d,0x1b ; -((2pi)^11)/11!
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4053 fcb 0x86,0x28,0x07,0xfb,0xf8 ; ((2pi)^9)/9!
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4054 fcb 0x87,0x99,0x68,0x89,0x01 ; -((2pi)^7)/7!
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4055 fcb 0x87,0x23,0x35,0xdf,0xe1 ; ((2pi)^5)/5!
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4056 fcb 0x86,0xa5,0x5d,0xe7,0x28 ; -(2pi)^3)/3!
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4057 fcb 0x83,0x49,0x0f,0xda,0xa2 ; 2*pi
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4058 ; these 12 bytes are unused
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4059 fcb 0xa1,0x54,0x46,0x8f,0x13,0x8f,0x52,0x43
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4060 fcb 0x89,0xcd,0xa6,0x81
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4061 ; these are the hardware interrupt vectors (coco1/2 only)
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4062 fdb SW3VEC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4063 fdb SW2VEC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4064 fdb FRQVEC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4065 fdb IRQVEC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4066 fdb SWIVEC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4067 fdb NMIVEC
605ff82c4618 Initial check in with cleaned up sources
William Astle <lost@l-w.ca>
parents:
diff changeset
4068 fdb RESVEC