msbasic/msbasic.s

4577 lines
81 KiB
ArmAsm

; Microsoft BASIC for 6502
.debuginfo +
.if .def(cbmbasic1)
CBM1 := 1
.include "defines_cbm.s"
.elseif .def(osi)
OSI := 1
.include "defines_osi.s"
.elseif .def(applesoft)
APPLE := 1
.include "defines_apple.s"
.elseif .def(kb9)
KIM := 1
.include "defines_kim.s"
.elseif .def(cbmbasic2)
CBM2 := 1
.include "defines_cbm.s"
.elseif .def(kbdbasic)
KBD := 1
.include "defines_kbd.s"
.endif
.ifdef CONFIG_SMALL
BYTES_FP := 4
.else
BYTES_FP := 5
.endif
.ifdef APPLE
BYTES_PER_ELEMENT := 6 ; ???
.else
BYTES_PER_ELEMENT := BYTES_FP
.endif
BYTES_PER_VARIABLE := BYTES_FP+2
MANTISSA_BYTES := BYTES_FP-1
BYTES_PER_FRAME := 2*BYTES_FP+8
FOR_STACK1 := 2*BYTES_FP+5
FOR_STACK2 := BYTES_FP+4
.ifdef CBM1
MAX_EXPON = 12
.else
MAX_EXPON = 10
.endif
.include "macros.s"
.include "zeropage.s"
.setcpu "6502"
.macpack longbranch
STACK := $0100
.segment "HEADER"
.ifdef KBD
jmp LE68C
.byte $00,$13,$56
.endif
.include "token.s"
.include "error.s"
.segment "CODE"
QT_ERROR:
.ifdef KBD
.byte " err"
.else
.ifdef APPLE
.byte " ERR"
.byte $07,$07
.else
.byte " ERROR"
.endif
.endif
.byte $00
.ifndef KBD
QT_IN:
.byte " IN "
.byte $00
QT_OK:
.ifdef APPLE
.byte $0D,$00,$00
.byte "K"
.else
.byte $0D,$0A
.ifdef CONFIG_CBM_ALL
.byte "READY."
.else
.byte "OK"
.endif
.endif
.byte $0D,$0A,$00
.else
.byte $54,$D2 ; ???
OKPRT:
jsr LDE42
.byte $0D,$0D
.byte ">>"
.byte $0D,$0A,$00
rts
nop
.endif
QT_BREAK:
.ifdef KBD
.byte $0D,$0A
.byte " Brk"
.byte $00
.byte $54,$D0 ; ???
.else
.byte $0D,$0A
.byte "BREAK"
.byte $00
.endif
GTFORPNT:
tsx
inx
inx
inx
inx
L2279:
lda STACK+1,x
cmp #$81
bne L22A1
lda FORPNT+1
bne L228E
lda STACK+2,x
sta FORPNT
lda STACK+3,x
sta FORPNT+1
L228E:
cmp STACK+3,x
bne L229A
lda FORPNT
cmp STACK+2,x
beq L22A1
L229A:
txa
clc
adc #BYTES_PER_FRAME
tax
bne L2279
L22A1:
rts
BLTU:
jsr REASON
sta STREND
sty STREND+1
BLTU2:
sec
lda HIGHTR
sbc LOWTR
sta INDEX
tay
lda HIGHTR+1
sbc LOWTR+1
tax
inx
tya
beq L22DD
lda HIGHTR
sec
sbc INDEX
sta HIGHTR
bcs L22C6
dec HIGHTR+1
sec
L22C6:
lda HIGHDS
sbc INDEX
sta HIGHDS
bcs L22D6
dec HIGHDS+1
bcc L22D6
L22D2:
lda (HIGHTR),y
sta (HIGHDS),y
L22D6:
dey
bne L22D2
lda (HIGHTR),y
sta (HIGHDS),y
L22DD:
dec HIGHTR+1
dec HIGHDS+1
dex
bne L22D6
rts
CHKMEM:
asl a
adc #SPACE_FOR_GOSUB
bcs MEMERR
sta INDEX
tsx
cpx INDEX
bcc MEMERR
rts
REASON:
cpy FRETOP+1
bcc L231E
bne L22FC
cmp FRETOP
bcc L231E
L22FC:
pha
ldx #FAC-TEMP1-1
tya
L2300:
pha
lda TEMP1,x
dex
bpl L2300
jsr GARBAG
ldx #TEMP1-FAC+1
L230B:
pla
sta FAC,x
inx
bmi L230B
pla
tay
pla
cpy FRETOP+1
bcc L231E
bne MEMERR
cmp FRETOP
bcs MEMERR
L231E:
rts
MEMERR:
ldx #ERR_MEMFULL
ERROR:
lsr Z14
.ifdef CONFIG_CBM_ALL
lda Z03 ; output
beq LC366 ; is screen
jsr CLRCH ; otherwise redirect output back to screen
lda #$00
sta Z03
LC366:
.endif
jsr CRDO
jsr OUTQUES
L2329:
lda ERROR_MESSAGES,x
.ifndef CONFIG_SMALL
pha
and #$7F
.endif
jsr OUTDO
.ifdef CONFIG_SMALL
lda ERROR_MESSAGES+1,x
.ifdef KBD
and #$7F
.endif
jsr OUTDO
.else
inx
pla
bpl L2329
.endif
jsr STKINI
lda #<QT_ERROR
ldy #>QT_ERROR
PRINT_ERROR_LINNUM:
jsr STROUT
ldy CURLIN+1
iny
beq RESTART
jsr INPRT
RESTART:
.ifdef KBD
jsr CRDO
nop
L2351X:
jsr OKPRT
L2351:
jsr LFDDA
LE28E:
bpl RESTART
.else
lsr Z14
lda #<QT_OK
ldy #>QT_OK
.ifdef CONFIG_CBM_ALL
jsr STROUT
.else
jsr GOWARM
.endif
L2351:
jsr INLIN
.endif
stx TXTPTR
sty TXTPTR+1
jsr CHRGET
.ifdef CONFIG_11
tax
.endif
.ifdef KBD
beq L2351X
.else
beq L2351
.endif
ldx #$FF
stx CURLIN+1
bcc NUMBERED_LINE
jsr PARSE_INPUT_LINE
jmp NEWSTT2
NUMBERED_LINE:
jsr LINGET
jsr PARSE_INPUT_LINE
sty EOLPNTR
.ifdef KBD
jsr LFD3E
lda JMPADRS+1
sta LOWTR
sta $96
lda JMPADRS+2
sta LOWTR+1
sta $97
lda $13
sta $06FE
lda $14
sta $06FF
inc $13
bne LE2D2
inc $14
bne LE2D2
jmp SYNERR
LE2D2:
jsr LF457
ldx #$96
jsr LE4D4
bcs LE2FD
LE2DC:
ldx #$00
lda (JMPADRS+1,x)
sta ($96,x)
inc JMPADRS+1
bne LE2E8
inc JMPADRS+2
LE2E8:
inc $96
bne LE2EE
inc $97
LE2EE:
ldx #$2B
jsr LE4D4
bne LE2DC
lda $96
sta VARTAB
lda $97
sta VARTAB+1
LE2FD:
jsr SETPTRS
jsr LE33D
lda Z00
LE306:
beq LE28E
cmp #$A5
beq LE306
clc
.else
jsr FNDLIN
bcc PUT_NEW_LINE
ldy #$01
lda (LOWTR),y
sta INDEX+1
lda VARTAB
sta INDEX
lda LOWTR+1
sta DEST+1
lda LOWTR
dey
sbc (LOWTR),y
clc
adc VARTAB
sta VARTAB
sta DEST
lda VARTAB+1
adc #$FF
sta VARTAB+1
sbc LOWTR+1
tax
sec
lda LOWTR
sbc VARTAB
tay
bcs L23A5
inx
dec DEST+1
L23A5:
clc
adc INDEX
bcc L23AD
dec INDEX+1
clc
L23AD:
lda (INDEX),y
sta (DEST),y
iny
bne L23AD
inc INDEX+1
inc DEST+1
dex
bne L23AD
PUT_NEW_LINE:
.ifdef CBM2
jsr SETPTRS
jsr LE33D
lda INPUTBUFFER
beq L2351
clc
.else
lda INPUTBUFFER
beq FIX_LINKS
lda MEMSIZ
ldy MEMSIZ+1
sta FRETOP
sty FRETOP+1
.endif
.endif
lda VARTAB
sta HIGHTR
adc EOLPNTR
sta HIGHDS
ldy VARTAB+1
sty HIGHTR+1
bcc L23D6
iny
L23D6:
sty HIGHDS+1
jsr BLTU
.ifdef CBM2_APPLE
lda LINNUM
ldy LINNUM+1
sta INPUTBUFFER-2
sty INPUTBUFFER-1
.endif
lda STREND
ldy STREND+1
sta VARTAB
sty VARTAB+1
ldy EOLPNTR
dey
L23E6:
lda INPUTBUFFER-4,y
sta (LOWTR),y
dey
bpl L23E6
FIX_LINKS:
jsr SETPTRS
.ifdef CBM2_KBD
jsr LE33D
jmp L2351
LE33D:
.endif
lda TXTTAB
ldy TXTTAB+1
sta INDEX
sty INDEX+1
clc
L23FA:
ldy #$01
lda (INDEX),y
.ifdef CBM2_KBD
beq RET3
.else
bne L2403
jmp L2351
.endif
L2403:
ldy #$04
L2405:
iny
lda (INDEX),y
bne L2405
iny
tya
adc INDEX
tax
ldy #$00
sta (INDEX),y
lda INDEX+1
adc #$00
iny
sta (INDEX),y
stx INDEX
sta INDEX+1
bcc L23FA
.ifdef KBD
SLOD:
ldx #$01
.byte $2C
PLOD:
ldx #$00
ldy CURLIN+1
iny
sty JMPADRS
jsr LFFD3
jsr LF422
ldx #$02
jsr LFF64
ldx #$6F
ldy #$00
jsr LE39A
jsr LE33D
jmp CLEARC
.byte $FF
.byte $FF
.byte $FF
VER:
lda #$13
ldx FAC
beq LE397
lda $DFF9
LE397:
jmp FLOAT
LE39A:
lda VARTAB,x
clc
adc $051B,y
sta VARTAB,y
lda VARTAB+1,x
adc $051C,y
sta VARTAB+1,y
RET3:
rts
.else
.ifdef APPLE
INLIN:
ldx #$DD
INLIN1:
stx $33
jsr L2900
cpx #$EF
bcs L0C32
ldx #$EF
L0C32:
lda #$00
sta $0200,x
ldx #$FF
ldy #$01
rts
RDKEY:
jsr LFD0C
and #$7F
.else
.ifdef CBM2
RET3:
rts
.else
L2420:
.ifdef OSI
jsr OUTDO
.endif
dex
bpl INLIN2
L2423:
.ifdef OSI
jsr OUTDO
.endif
jsr CRDO
.endif
INLIN:
ldx #$00
INLIN2:
jsr GETLN
.ifndef CONFIG_CBM_ALL
cmp #$07
beq L2443
.endif
cmp #$0D
beq L2453
.ifndef CONFIG_CBM_ALL
cmp #$20 ; line editing
bcc INLIN2
cmp #$7D
bcs INLIN2
cmp #$40 ; @
beq L2423
cmp #$5F ; _
beq L2420
L2443:
cpx #$47
bcs L244C
.endif
sta INPUTBUFFER,x
inx
.ifdef OSI
.byte $2C
.else
bne INLIN2
.endif
L244C:
.ifndef CONFIG_CBM_ALL
lda #$07
jsr OUTDO
bne INLIN2
.endif
L2453:
jmp L29B9
GETLN:
.ifdef CONFIG_CBM_ALL
jsr CHRIN
ldy Z03
bne L2465
.else
jsr MONRDKEY
.endif
.ifdef OSI
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
and #$7F
.endif
.endif
cmp #$0F
bne L2465
pha
lda Z14
eor #$FF
sta Z14
pla
L2465:
rts
.endif /* KBD */
PARSE_INPUT_LINE:
ldx TXTPTR
ldy #$04
sty DATAFLG
L246C:
lda INPUTBUFFERX,x
.ifdef CONFIG_CBM_ALL
bpl LC49E
cmp #$FF
beq L24AC
inx
bne L246C
LC49E:
.endif
cmp #$20
beq L24AC
sta ENDCHR
cmp #$22
beq L24D0
bit DATAFLG
bvs L24AC
cmp #$3F
bne L2484
lda #TOKEN_PRINT
bne L24AC
L2484:
cmp #$30
bcc L248C
cmp #$3C
bcc L24AC
L248C:
sty STRNG2
ldy #$00
sty EOLPNTR
dey
stx TXTPTR
dex
L2496:
iny
L2497:
inx
L2498:
.ifdef KBD
jsr LF42D
.else
lda INPUTBUFFERX,x
.ifndef CBM2
cmp #$20
beq L2497
.endif
.endif
sec
sbc TOKEN_NAME_TABLE,y
beq L2496
cmp #$80
bne L24D7
ora EOLPNTR
L24AA:
ldy STRNG2
L24AC:
inx
iny
sta INPUTBUFFER-5,y
lda INPUTBUFFER-5,y
beq L24EA
sec
sbc #$3A
beq L24BF
cmp #$49
bne L24C1
L24BF:
sta DATAFLG
L24C1:
sec
sbc #TOKEN_REM-':'
bne L246C
sta ENDCHR
L24C8:
lda INPUTBUFFERX,x
beq L24AC
cmp ENDCHR
beq L24AC
L24D0:
iny
sta INPUTBUFFER-5,y
inx
bne L24C8
L24D7:
ldx TXTPTR
inc EOLPNTR
L24DB:
iny
lda MATHTBL+28+1,y
bpl L24DB
lda TOKEN_NAME_TABLE,y
bne L2498
lda INPUTBUFFERX,x
bpl L24AA
L24EA:
sta INPUTBUFFER-3,y
.if INPUTBUFFER >= $0100
dec TXTPTR+1
.endif
lda #<INPUTBUFFER-1
sta TXTPTR
rts
FNDLIN:
.ifdef KBD
jsr CHRGET
jmp LE444
LE440:
php
jsr LINGET
LE444:
jsr LF457
ldx #$FF
plp
beq LE464
jsr CHRGOT
beq L2520
cmp #$A5
bne L2520
jsr CHRGET
beq LE464
bcs LE461
jsr LINGET
beq L2520
LE461:
jmp SYNERR
LE464:
stx $13
stx $14
.else
lda TXTTAB
ldx TXTTAB+1
FL1:
ldy #$01
sta LOWTR
stx LOWTR+1
lda (LOWTR),y
beq L251F
iny
iny
lda LINNUM+1
cmp (LOWTR),y
bcc L2520
beq L250D
dey
bne L2516
L250D:
lda LINNUM
dey
cmp (LOWTR),y
bcc L2520
beq L2520
L2516:
dey
lda (LOWTR),y
tax
dey
lda (LOWTR),y
bcs FL1
L251F:
clc
.endif
L2520:
rts
NEW:
bne L2520
SCRTCH:
lda #$00
tay
sta (TXTTAB),y
iny
sta (TXTTAB),y
lda TXTTAB
.ifdef CBM2_KBD
clc
.endif
adc #$02
sta VARTAB
lda TXTTAB+1
adc #$00
sta VARTAB+1
SETPTRS:
jsr STXTPT
.ifndef APPLE
.ifdef CONFIG_11
lda #$00
CLEAR:
bne L256A
.endif
.endif
CLEARC:
.ifdef KBD
lda #<CONST_MEMSIZ
ldy #>CONST_MEMSIZ
.else
lda MEMSIZ
ldy MEMSIZ+1
.endif
sta FRETOP
sty FRETOP+1
.ifdef CONFIG_CBM_ALL
jsr CLALL
.endif
lda VARTAB
ldy VARTAB+1
sta ARYTAB
sty ARYTAB+1
sta STREND
sty STREND+1
jsr RESTORE
STKINI:
ldx #TEMPST
stx TEMPPT
pla
.ifdef CBM2_KBD
tay
.else
.ifdef APPLE
sta STACK+249
.else
sta STACK+253
.endif
.endif
pla
.ifndef CBM2_KBD
.ifdef APPLE
sta STACK+250
.else
sta STACK+254
.endif
.endif
ldx #STACK_TOP
txs
.ifdef CBM2_KBD
pha
tya
pha
.endif
lda #$00
sta OLDTEXT+1
sta SUBFLG
L256A:
rts
STXTPT:
clc
lda TXTTAB
adc #$FF
sta TXTPTR
lda TXTTAB+1
adc #$FF
sta TXTPTR+1
rts
.ifdef KBD
LE4C0:
ldy #<LE444
ldx #>LE444
LE4C4:
jsr LFFD6
jsr LFFED
lda $0504
clc
adc #$08
sta $0504
rts
LE4D4:
lda $01,x
cmp JMPADRS+2
bne LE4DE
lda $00,x
cmp JMPADRS+1
LE4DE:
rts
LIST:
jsr LE440
bne LE4DE
pla
pla
L25A6:
jsr CRDO
.else
LIST:
bcc L2581
beq L2581
cmp #TOKEN_MINUS
bne L256A
L2581:
jsr LINGET
jsr FNDLIN
jsr CHRGOT
beq L2598
cmp #TOKEN_MINUS
bne L2520
jsr CHRGET
jsr LINGET
bne L2520
L2598:
pla
pla
lda LINNUM
ora LINNUM+1
bne L25A6
lda #$FF
sta LINNUM
sta LINNUM+1
L25A6:
.endif
ldy #$01
.ifdef CONFIG_DATAFLAG
sty DATAFLG
.endif
lda (LOWTRX),y
beq L25E5
jsr ISCNTC
.ifndef KBD
jsr CRDO
.endif
iny
lda (LOWTRX),y
tax
iny
lda (LOWTRX),y
cmp LINNUM+1
bne L25C1
cpx LINNUM
beq L25C3
L25C1:
bcs L25E5
L25C3:
sty FORPNT
jsr LINPRT
lda #$20
L25CA:
ldy FORPNT
and #$7F
L25CE:
jsr OUTDO
.ifdef CONFIG_DATAFLAG
cmp #$22
bne LA519
lda DATAFLG
eor #$FF
sta DATAFLG
LA519:
.endif
iny
.ifdef CONFIG_11
beq L25E5
.endif
lda (LOWTRX),y
bne L25E8
tay
lda (LOWTRX),y
tax
iny
lda (LOWTRX),y
stx LOWTRX
sta LOWTRX+1
bne L25A6
L25E5:
jmp RESTART
L25E8:
bpl L25CE
.ifdef CONFIG_DATAFLAG
cmp #$FF
beq L25CE
bit DATAFLG
bmi L25CE
.endif
sec
sbc #$7F
tax
sty FORPNT
ldy #$FF
L25F2:
dex
beq L25FD
L25F5:
iny
lda TOKEN_NAME_TABLE,y
bpl L25F5
bmi L25F2
L25FD:
iny
lda TOKEN_NAME_TABLE,y
bmi L25CA
jsr OUTDO
bne L25FD
FOR:
lda #$80
sta SUBFLG
jsr LET
jsr GTFORPNT
bne L2619
txa
adc #FOR_STACK1
tax
txs
L2619:
pla
pla
lda #FOR_STACK2
jsr CHKMEM
jsr DATAN
clc
tya
adc TXTPTR
pha
lda TXTPTR+1
adc #$00
pha
lda CURLIN+1
pha
lda CURLIN
pha
lda #TOKEN_TO
jsr SYNCHR
jsr CHKNUM
jsr FRMNUM
lda FACSIGN
ora #$7F
and FAC+1
sta FAC+1
lda #<STEP
ldy #>STEP
sta INDEX
sty INDEX+1
jmp L2CED
STEP:
lda #<CON_ONE
ldy #>CON_ONE
jsr LOAD_FAC_FROM_YA
jsr CHRGOT
cmp #TOKEN_STEP
bne L2665
jsr CHRGET
jsr FRMNUM
L2665:
jsr SIGN
jsr FRM_STACK2
lda FORPNT+1
pha
lda FORPNT
pha
lda #$81
pha
NEWSTT:
jsr ISCNTC
lda TXTPTR
ldy TXTPTR+1
.ifdef CBM2_KBD
cpy #>INPUTBUFFER
.endif
.ifdef CBM2
nop
.endif
.ifdef CBM2_KBD
beq LC6D4
.else
beq L2683
.endif
sta OLDTEXT
sty OLDTEXT+1
LC6D4:
ldy #$00
L2683:
lda (TXTPTR),y
.ifndef CONFIG_11
beq LA5DC
cmp #$3A
beq NEWSTT2
SYNERR1:
jmp SYNERR
LA5DC:
.else
bne COLON
.endif
ldy #$02
lda (TXTPTR),y
clc
.ifdef CBM2_KBD
jeq L2701
.else
beq L2701
.endif
iny
lda (TXTPTR),y
sta CURLIN
iny
lda (TXTPTR),y
sta CURLIN+1
tya
adc TXTPTR
sta TXTPTR
bcc NEWSTT2
inc TXTPTR+1
NEWSTT2:
jsr CHRGET
jsr EXECUTE_STATEMENT
jmp NEWSTT
EXECUTE_STATEMENT:
.ifndef CONFIG_11_NOAPPLE
beq RET1
.ifndef APPLE
sec
.endif
.else
beq RET2
.endif
EXECUTE_STATEMENT1:
sbc #$80
.ifndef CONFIG_11
jcc LET
.else
bcc LET1
.endif
cmp #NUM_TOKENS
.ifdef CBM2_KBD
bcs LC721
.else
bcs SYNERR1
.endif
asl a
tay
lda TOKEN_ADDRESS_TABLE+1,y
pha
lda TOKEN_ADDRESS_TABLE,y
pha
jmp CHRGET
.ifdef CONFIG_11
LET1:
jmp LET
COLON:
cmp #$3A
beq NEWSTT2
SYNERR1:
jmp SYNERR
.endif
.ifdef CBM2_KBD
LC721:
.ifdef KBD
cmp #$45
.else
cmp #$4B
.endif
bne SYNERR1
jsr CHRGET
lda #TOKEN_TO
jsr SYNCHR
jmp GOTO
.endif
RESTORE:
sec
lda TXTTAB
sbc #$01
ldy TXTTAB+1
bcs SETDA
dey
SETDA:
sta DATPTR
sty DATPTR+1
RET2:
rts
.ifndef CONFIG_CBM_ALL
ISCNTC:
.endif
.ifdef KBD
jsr LE8F3
bcc RET1
LE633:
jsr LDE7F
beq STOP
cmp #$03
bne LE633
.endif
.ifdef OSI
jmp MONISCNTC
nop
nop
nop
nop
lsr a
bcc RET2
jsr GETLN
cmp #$03
.endif
.ifdef APPLE
lda $C000
cmp #$83
beq L0ECC
rts
L0ECC:
jsr RDKEY
cmp #$03
.endif
.ifdef KIM
lda #$01
bit $1740
bmi RET2
ldx #$08
lda #$03
clc
cmp #$03
.endif
STOP:
bcs END2
END:
clc
END2:
bne RET1
lda TXTPTR
ldy TXTPTR+1
.ifdef CBM2_KBD
ldx CURLIN+1
inx
.endif
beq END4
sta OLDTEXT
sty OLDTEXT+1
CONTROL_C_TYPED:
lda CURLIN
ldy CURLIN+1
sta OLDLIN
sty OLDLIN+1
END4:
pla
pla
L2701:
lda #<QT_BREAK
ldy #>QT_BREAK
.ifndef KBD
ldx #$00
stx Z14
.endif
bcc L270E
jmp PRINT_ERROR_LINNUM
L270E:
jmp RESTART
.ifdef KBD
LE664:
tay
jmp SNGFLT
.endif
CONT:
bne RET1
ldx #ERR_CANTCONT
ldy OLDTEXT+1
bne L271C
jmp ERROR
L271C:
lda OLDTEXT
sta TXTPTR
sty TXTPTR+1
lda OLDLIN
ldy OLDLIN+1
sta CURLIN
sty CURLIN+1
RET1:
rts
.ifdef KBD
PRT:
jsr GETBYT
txa
ror a
ror a
ror a
sta $8F
rts
LE68C:
ldy #$12
LE68E:
lda LEA30,y
sta $03A2,y
dey
bpl LE68E
rts
.endif
.if .def(CONFIG_NULL) || .def(CBM1)
; CBM1 has the keyword removed,
; but the code is, still here
NULL:
jsr GETBYT
bne RET1
inx
cpx #NULL_MAX
bcs L2739
dex
stx Z15
rts
L2739:
jmp IQERR
.endif
.ifndef CONFIG_11_NOAPPLE
CLEAR:
bne RET1
jmp CLEARC
.endif
.ifdef APPLE
SAVE:
jsr L0F42
jsr LFECD
jsr L0F51
jmp LFECD
LOAD:
jsr L0F42
jsr LFEFD
jsr L0F51
jsr LFEFD
lda #<QT_LOADED
ldy #>QT_LOADED
jsr STROUT
jmp FIX_LINKS
QT_LOADED:
.byte 0 ; XXX PATCHED
.byte "OADED"
.byte 0
L0F42:
lda #$6C
ldy #$00
sta $3C
sty $3D
lda #$6E
sta $3E
sty $3F
rts
L0F51:
lda $6A
ldy $6B
sta $3C
sty $3D
lda $6C
ldy $6D
sta $3E
sty $3F
rts
.endif
.ifdef KIM
SAVE:
tsx
stx INPUTFLG
lda #$37
sta $F2
lda #$FE
sta $17F9
lda TXTTAB
ldy TXTTAB+1
sta $17F5
sty $17F6
lda VARTAB
ldy VARTAB+1
sta $17F7
sty $17F8
jmp L1800
ldx INPUTFLG
txs
lda #<QT_SAVED
ldy #>QT_SAVED
jmp STROUT
QT_LOADED:
.byte "LOADED"
.byte $00
QT_SAVED:
.byte "SAVED"
.byte $0D,$0A,$00,$00,$00,$00,$00,$00
.byte $00,$00,$00,$00,$00,$00,$00,$00
.byte $00,$00,$00,$00,$00,$00,$00
LOAD:
lda TXTTAB
ldy TXTTAB+1
sta $17F5
sty $17F6
lda #$FF
sta $17F9
lda #$A6
ldy #$27 ; XXX
sta L0001
sty L0001+1
jmp L1873
ldx #$FF
txs
lda #$48
ldy #$23 ; XXX
sta L0001
sty L0001+1
lda #<QT_LOADED
ldy #>QT_LOADED
jsr STROUT
ldx $17ED
ldy $17EE
txa
bne L27C2
nop
L27C2:
nop
stx VARTAB
sty VARTAB+1
jmp FIX_LINKS
.endif
RUN:
bne L27CF
jmp SETPTRS
L27CF:
jsr CLEARC
jmp L27E9
GOSUB:
lda #$03
jsr CHKMEM
lda TXTPTR+1
pha
lda TXTPTR
pha
lda CURLIN+1
pha
lda CURLIN
pha
lda #TOKEN_GOSUB
pha
L27E9:
jsr CHRGOT
jsr GOTO
jmp NEWSTT
GOTO:
jsr LINGET
jsr REMN
lda CURLIN+1
cmp LINNUM+1
bcs L2809
tya
sec
adc TXTPTR
ldx TXTPTR+1
bcc L280D
inx
bcs L280D
L2809:
lda TXTTAB
ldx TXTTAB+1
L280D:
.ifdef KBD
jsr LF457
bne UNDERR
.else
jsr FL1
bcc UNDERR
.endif
lda LOWTRX
sbc #$01
sta TXTPTR
lda LOWTRX+1
sbc #$00
sta TXTPTR+1
L281E:
rts
POP:
bne L281E
lda #$FF
.ifdef CBM2_KBD
sta FORPNT+1 ; bugfix, wrong in AppleSoft
.else
sta FORPNT
.endif
jsr GTFORPNT
txs
cmp #TOKEN_GOSUB
beq RETURN
ldx #ERR_NOGOSUB
.byte $2C
UNDERR:
ldx #ERR_UNDEFSTAT
jmp ERROR
SYNERR2:
jmp SYNERR
RETURN:
pla
pla
sta CURLIN
pla
sta CURLIN+1
pla
sta TXTPTR
pla
sta TXTPTR+1
DATA:
jsr DATAN
ADDON:
tya
clc
adc TXTPTR
sta TXTPTR
bcc L2852
inc TXTPTR+1
L2852:
rts
DATAN:
ldx #$3A
.byte $2C
REMN:
ldx #$00
stx CHARAC
ldy #$00
sty ENDCHR
L285E:
lda ENDCHR
ldx CHARAC
sta CHARAC
stx ENDCHR
L2866:
lda (TXTPTR),y
beq L2852
cmp ENDCHR
beq L2852
iny
cmp #$22
.ifndef CONFIG_11
beq L285E
bne L2866
.else
bne L2866
beq L285E
.endif
IF:
jsr FRMEVL
jsr CHRGOT
cmp #TOKEN_GOTO
beq L2884
lda #TOKEN_THEN
jsr SYNCHR
L2884:
lda FAC
bne L288D
REM:
jsr REMN
beq ADDON
L288D:
jsr CHRGOT
bcs L2895
jmp GOTO
L2895:
jmp EXECUTE_STATEMENT
ON:
jsr GETBYT
pha
cmp #TOKEN_GOSUB
beq L28A4
L28A0:
cmp #TOKEN_GOTO
bne SYNERR2
L28A4:
dec FAC_LAST
bne L28AC
pla
jmp EXECUTE_STATEMENT1
L28AC:
jsr CHRGET
jsr LINGET
cmp #$2C
beq L28A4
pla
L28B7:
rts
LINGET:
ldx #$00
stx LINNUM
stx LINNUM+1
L28BE:
bcs L28B7
sbc #$2F
sta CHARAC
lda LINNUM+1
sta INDEX
cmp #$19
bcs L28A0
; <<<<<DANGEROUS CODE>>>>>
; NOTE THAT IF (A) = $AB ON THE LINE ABOVE,
; ON.1 WILL COMPARE = AND CAUSE A CATASTROPHIC
; JUMP TO $22D9 (FOR GOTO), OR OTHER LOCATIONS
; FOR OTHER CALLS TO LINGET.
;
; YOU CAN SEE THIS IS YOU FIRST PUT "BRK" IN $22D9,
; THEN TYPE "GO TO 437761".
;
; ANY VALUE FROM 437760 THROUGH 440319 WILL CAUSE
; THE PROBLEM. ($AB00 - $ABFF)
; <<<<<DANGEROUS CODE>>>>>
lda LINNUM
asl a
rol INDEX
asl a
rol INDEX
adc LINNUM
sta LINNUM
lda INDEX
adc LINNUM+1
sta LINNUM+1
asl LINNUM
rol LINNUM+1
lda LINNUM
adc CHARAC
sta LINNUM
bcc L28EC
inc LINNUM+1
L28EC:
jsr CHRGET
jmp L28BE
LET:
jsr PTRGET
sta FORPNT
sty FORPNT+1
lda #TOKEN_EQUAL
jsr SYNCHR
.ifndef CONFIG_SMALL
lda VALTYP+1
pha
.endif
lda VALTYP
pha
jsr FRMEVL
pla
rol a
jsr CHKVAL
bne LETSTRING
.ifndef CONFIG_SMALL
pla
LET2:
bpl L2923
jsr ROUND_FAC
jsr AYINT
ldy #$00
lda FAC+3
sta (FORPNT),y
iny
lda FAC+4
sta (FORPNT),y
rts
L2923:
.endif
jmp SETFOR
LETSTRING:
.ifndef CONFIG_SMALL
pla
PUTSTR:
.endif
.ifdef CONFIG_CBM_ALL
ldy FORPNT+1
.ifdef CBM1
cpy #$D0
.else
cpy #$DE
.endif
bne LC92B
jsr FREFAC
cmp #$06
.ifdef CBM2_KBD
bne IQERR1
.else
beq LC8E2
jmp IQERR
LC8E2:
.endif
ldy #$00
sty FAC
sty FACSIGN
LC8E8:
sty STRNG2
jsr LC91C
jsr MUL10
inc STRNG2
ldy STRNG2
jsr LC91C
jsr COPY_FAC_TO_ARG_ROUNDED
tax
beq LC902
inx
txa
jsr LD9BF
LC902:
ldy STRNG2
iny
cpy #$06
bne LC8E8
jsr MUL10
jsr QINT
ldx #$02
sei
LC912:
lda FAC+2,x
.ifdef CBM2
sta $8D,x
.else
sta $0200,x
.endif
dex
bpl LC912
cli
rts
LC91C:
lda (INDEX),y
jsr L00CF
bcc LC926
IQERR1:
jmp IQERR
LC926:
sbc #$2F
jmp ADDACC
LC92B:
.endif
ldy #$02
lda (FAC_LAST-1),y
cmp FRETOP+1
bcc L2946
bne L2938
dey
lda (FAC_LAST-1),y
cmp FRETOP
bcc L2946
L2938:
ldy FAC_LAST
cpy VARTAB+1
bcc L2946
bne L294D
lda FAC_LAST-1
cmp VARTAB
bcs L294D
L2946:
lda FAC_LAST-1
ldy FAC_LAST
jmp L2963
L294D:
ldy #$00
lda (FAC_LAST-1),y
jsr STRINI
lda DSCPTR
ldy DSCPTR+1
sta STRNG1
sty STRNG1+1
jsr MOVINS
lda #FAC
ldy #$00
L2963:
sta DSCPTR
sty DSCPTR+1
jsr FRETMS
ldy #$00
lda (DSCPTR),y
sta (FORPNT),y
iny
lda (DSCPTR),y
sta (FORPNT),y
iny
lda (DSCPTR),y
sta (FORPNT),y
rts
.ifdef CONFIG_CBM_ALL
PRINTH:
jsr CMD
jmp LCAD6
CMD:
jsr GETBYT
beq LC98F
lda #$2C
jsr SYNCHR
LC98F:
php
jsr CHKOUT
stx Z03
plp
jmp PRINT
.endif
PRSTRING:
jsr STRPRT
L297E:
jsr CHRGOT
PRINT:
beq CRDO
PRINT2:
beq L29DD
cmp #TOKEN_TAB
beq L29F5
cmp #TOKEN_SPC
.ifdef CBM2_KBD
clc
.endif
beq L29F5
cmp #','
.ifdef KIM
clc
.endif
beq L29DE
cmp #$3B
beq L2A0D
jsr FRMEVL
bit VALTYP
bmi PRSTRING
jsr FOUT
jsr STRLIT
.ifndef CONFIG_CBM_ALL
ldy #$00
lda (FAC_LAST-1),y
clc
adc Z16
.ifdef KBD
cmp #$28
.else
cmp Z17
.endif
bcc L29B1
jsr CRDO
L29B1:
.endif
jsr STRPRT
.ifdef KBD
jmp L297E
LE86C:
pla
jmp CONTROL_C_TYPED
LE870:
jsr GETBYT
txa
LE874:
beq LE878
bpl LE8F2
LE878:
jmp IQERR
CRDO:
lda #$0A
sta $10
jsr OUTDO
LE882:
lda #$0D
jsr OUTDO
PRINTNULLS:
lda #$00
sta $10
eor #$FF
.else
jsr OUTSP
bne L297E
L29B9:
.ifdef CBM2
lda #$00
sta INPUTBUFFER,x
ldx #<(INPUTBUFFER-1)
ldy #>(INPUTBUFFER-1)
.else
.ifndef APPLE
ldy #$00
sty INPUTBUFFER,x
ldx #LINNUM+1
.endif
.endif
.ifdef CONFIG_CBM_ALL
lda Z03
bne L29DD
LC9D2:
.endif
CRDO:
.ifdef CBM1
lda Z03
bne LC9D8
sta $05
LC9D8:
.endif
lda #$0D
.ifndef CONFIG_CBM_ALL
sta Z16
.endif
jsr OUTDO
.ifdef APPLE
lda #$80
.else
lda #$0A
.endif
jsr OUTDO
PRINTNULLS:
.ifdef CBM1
lda Z03
bne L29DD
.endif
.if .def(CONFIG_NULL) || .def(CBM1)
txa
pha
ldx Z15
beq L29D9
lda #$00
L29D3:
jsr OUTDO
dex
bne L29D3
L29D9:
stx Z16
pla
tax
.else
.ifdef APPLE
lda #$00
sta $50
.endif
eor #$FF
.endif
.endif
L29DD:
rts
L29DE:
lda Z16
.ifndef CONFIG_CBM_ALL
.ifdef KBD
cmp #$1A
.else
cmp Z18
.endif
bcc L29EA
jsr CRDO
jmp L2A0D
L29EA:
.endif
sec
L29EB:
.ifdef CONFIG_CBM_ALL
sbc #$0A
.else
.ifdef KBD
sbc #$0D
.else
sbc #$0E
.endif
.endif
bcs L29EB
eor #$FF
adc #$01
bne L2A08
L29F5:
.ifdef CONFIG_11_NOAPPLE
php
.else
pha
.endif
jsr GTBYTC
cmp #$29
.ifndef CONFIG_11_NOAPPLE
.ifdef APPLE
beq L1185
jmp SYNERR
L1185:
.else
bne SYNERR4
.endif
pla
cmp #TOKEN_TAB
.ifdef APPLE
bne L2A09
.else
bne L2A0A
.endif
.else
.ifdef CBM2_KBD
bne SYNERR4
.else
beq @1
jmp SYNERR
@1:
.endif
plp ;; XXX c64 has this
bcc L2A09
.endif
txa
sbc Z16
bcc L2A0D
.ifndef CONFIG_11
beq L2A0D
.endif
L2A08:
tax
.ifdef CONFIG_11
L2A09:
inx
.endif
L2A0A:
.ifndef CONFIG_11
jsr OUTSP
.endif
dex
.ifndef CONFIG_11
bne L2A0A
.else
bne L2A13
.endif
L2A0D:
jsr CHRGET
jmp PRINT2
.ifdef CONFIG_11
L2A13:
jsr OUTSP
bne L2A0A
.endif
STROUT:
jsr STRLIT
STRPRT:
jsr FREFAC
tax
ldy #$00
inx
L2A22:
dex
beq L29DD
lda (INDEX),y
jsr OUTDO
iny
cmp #$0D
bne L2A22
jsr PRINTNULLS
jmp L2A22
OUTSP:
.ifdef CBM2
lda $0E
beq LCA40
lda #$20
.byte $2C
LCA40:
.endif
.ifdef CONFIG_CBM_ALL
lda #$1D
.else
lda #$20
.endif
.byte $2C
OUTQUES:
lda #$3F
OUTDO:
.ifndef KBD
bit Z14
bmi L2A56
.endif
.ifndef CBM2_KBD
pha
.endif
.ifdef CBM1
cmp #$1D
beq LCA6A
cmp #$9D
beq LCA5A
cmp #$14
bne LCA64
LCA5A:
lda $05
beq L2A4E
lda Z03
bne L2A4E
dec $05
LCA64:
and #$7F
.endif
.ifndef CBM2
cmp #$20
bcc L2A4E
.endif
LCA6A:
.ifdef CONFIG_CBM1_PATCHES
lda Z03
jsr PATCH6
nop
.endif
.ifdef CONFIG_PRINT_CR
lda Z16
cmp Z17
bne L2A4C
.ifdef APPLE
nop ; PATCH!
nop ; don't print CR
nop
.else
jsr CRDO
.endif
L2A4C:
.endif
.ifndef CONFIG_CBM_ALL
inc Z16
.endif
L2A4E:
.ifndef CBM2_KBD
pla
.endif
.ifdef KIM
sty DIMFLG
.endif
.ifdef APPLE
ora #$80
.endif
jsr MONCOUT
.ifdef APPLE
and #$7F
.endif
.ifdef KIM
ldy DIMFLG
.endif
.ifdef OSI
nop
nop
nop
nop
.endif
L2A56:
and #$FF
LE8F2:
rts
.ifdef KBD
LE8F3:
pha
lda $047F
clc
beq LE900
lda #$00
sta $047F
sec
LE900:
pla
rts
.endif
L2A59:
lda INPUTFLG
beq L2A6E
.ifdef CBM2_KIM_APPLE
bmi L2A63
ldy #$FF
bne L2A67
L2A63:
.endif
.ifdef CONFIG_CBM1_PATCHES
jsr PATCH5
nop
.else
lda Z8C
ldy Z8C+1
.endif
L2A67:
sta CURLIN
sty CURLIN+1
SYNERR4:
jmp SYNERR
L2A6E:
.ifdef CONFIG_CBM_ALL
lda Z03
beq LCA8F
ldx #ERR_BADDATA
jmp ERROR
LCA8F:
.endif
lda #<ERRREENTRY
ldy #>ERRREENTRY
jsr STROUT
lda OLDTEXT
ldy OLDTEXT+1
sta TXTPTR
sty TXTPTR+1
LE920:
rts
.ifndef CONFIG_SMALL
GET:
jsr ERRDIR
.ifdef CONFIG_CBM_ALL
cmp #$23
bne LCAB6
jsr CHRGET
jsr GETBYT
lda #$2C
jsr SYNCHR
jsr CHKIN
stx Z03
LCAB6:
.endif
ldx #<(INPUTBUFFER+1)
ldy #>(INPUTBUFFER+1)
.if INPUTBUFFER >= $0100
lda #$00
sta INPUTBUFFER+1
.else
sty INPUTBUFFER+1
.endif
lda #$40
jsr PROCESS_INPUT_LIST
.ifdef CONFIG_CBM_ALL
ldx Z03
bne LCAD8
.endif
rts
.endif
.ifdef CONFIG_CBM_ALL
INPUTH:
jsr GETBYT
lda #$2C
jsr SYNCHR
jsr CHKIN
stx Z03
jsr L2A9E
LCAD6:
lda Z03
LCAD8:
jsr CLRCH
ldx #$00
stx Z03
rts
LCAE0:
.endif
INPUT:
.ifndef KBD
lsr Z14
.endif
cmp #$22
bne L2A9E
jsr STRTXT
lda #$3B
jsr SYNCHR
jsr STRPRT
L2A9E:
jsr ERRDIR
lda #$2C
sta INPUTBUFFER-1
LCAF8:
.ifdef APPLE
jsr INLINX
.else
jsr NXIN
.endif
.ifdef KBD
bmi L2ABE
NXIN:
jsr LFDDA
bmi LE920
pla
jmp LE86C
.else
.ifdef CONFIG_CBM_ALL
lda Z03
beq LCB0C
lda Z96
and #$02
beq LCB0C
jsr LCAD6
jmp DATA
LCB0C:
.endif
lda INPUTBUFFER
bne L2ABE
.ifdef CONFIG_CBM_ALL
lda Z03
bne LCAF8
.ifdef CONFIG_CBM1_PATCHES
jmp PATCH1
.else
clc
jmp CONTROL_C_TYPED
.endif
NXIN:
lda Z03
bne LCB21
.else
clc
jmp CONTROL_C_TYPED
NXIN:
.endif
jsr OUTQUES
jsr OUTSP
LCB21:
jmp INLIN
.endif /* KBD */
.ifdef KBD
GETC:
jsr CONINT
jsr LF43D
jmp LE664
.endif
READ:
ldx DATPTR
ldy DATPTR+1
.ifdef CBM2_KBD
lda #$98 ; AppleSoft, too
.byte $2C
L2ABE:
lda #$00
.else
.byte $A9
L2ABE:
tya
.endif
PROCESS_INPUT_LIST:
sta INPUTFLG
stx INPTR
sty INPTR+1
PROCESS_INPUT_ITEM:
jsr PTRGET
sta FORPNT
sty FORPNT+1
lda TXTPTR
ldy TXTPTR+1
sta TXPSV
sty TXPSV+1
ldx INPTR
ldy INPTR+1
stx TXTPTR
sty TXTPTR+1
jsr CHRGOT
bne INSTART
bit INPUTFLG
.ifndef CONFIG_SMALL
bvc L2AF0
jsr MONRDKEY
.ifdef APPLE
and #$7F
.endif
sta INPUTBUFFER
.ifdef CBM1
ldy #>(INPUTBUFFER-1)
ldx #<(INPUTBUFFER-1)
.else
ldx #<(INPUTBUFFER-1)
ldy #>(INPUTBUFFER-1)
.endif
bne L2AF8
L2AF0:
.endif
bmi FINDATA
.ifdef CONFIG_CBM_ALL
lda Z03
bne LCB64
.endif
.ifdef KBD
jsr OUTQUESSP
.else
jsr OUTQUES
.endif
LCB64:
jsr NXIN
L2AF8:
stx TXTPTR
sty TXTPTR+1
INSTART:
jsr CHRGET
bit VALTYP
bpl L2B34
.ifndef CONFIG_SMALL
bit INPUTFLG
bvc L2B10
.ifdef CONFIG_CBM1_PATCHES
lda #$00
jsr PATCH4
nop
.else
inx
stx TXTPTR
lda #$00
sta CHARAC
beq L2B1C
.endif
L2B10:
.endif
sta CHARAC
cmp #$22
beq L2B1D
lda #$3A
sta CHARAC
lda #$2C
L2B1C:
clc
L2B1D:
sta ENDCHR
lda TXTPTR
ldy TXTPTR+1
adc #$00
bcc L2B28
iny
L2B28:
jsr STRLT2
jsr POINT
.ifdef CONFIG_SMALL
jsr LETSTRING
.else
jsr PUTSTR
.endif
jmp INPUT_MORE
L2B34:
jsr FIN
.ifdef CONFIG_SMALL
jsr SETFOR
.else
lda VALTYP+1
jsr LET2
.endif
INPUT_MORE:
jsr CHRGOT
beq L2B48
cmp #$2C
beq L2B48
jmp L2A59
L2B48:
lda TXTPTR
ldy TXTPTR+1
sta INPTR
sty INPTR+1
lda TXPSV
ldy TXPSV+1
sta TXTPTR
sty TXTPTR+1
jsr CHRGOT
beq INPDONE
jsr CHKCOM
jmp PROCESS_INPUT_ITEM
FINDATA:
jsr DATAN
iny
tax
bne L2B7C
ldx #ERR_NODATA
iny
lda (TXTPTR),y
beq GERR
iny
lda (TXTPTR),y
sta Z8C
iny
lda (TXTPTR),y
iny
sta Z8C+1
L2B7C:
lda (TXTPTR),y
tax
jsr ADDON
cpx #$83
bne FINDATA
jmp INSTART
INPDONE:
lda INPTR
ldy INPTR+1
ldx INPUTFLG
.ifdef OSI
beq L2B94
.else
bpl L2B94
.endif
jmp SETDA
L2B94:
ldy #$00
lda (INPTR),y
beq L2BA1
.ifdef CONFIG_CBM_ALL
lda Z03
bne L2BA1
.endif
lda #<ERREXTRA
ldy #>ERREXTRA
jmp STROUT
L2BA1:
rts
ERREXTRA:
.ifdef KBD
.byte "?Extra"
.else
.byte "?EXTRA IGNORED"
.endif
.byte $0D,$0A,$00
ERRREENTRY:
.ifdef KBD
.byte "What?"
.else
.byte "?REDO FROM START"
.endif
.byte $0D,$0A,$00
.ifdef KBD
LEA30:
.byte "B"
.byte $FD
.byte "GsBASIC"
.byte $00,$1B,$0D,$13
.byte " BASIC"
.endif
NEXT:
bne NEXT1
ldy #$00
beq NEXT2
NEXT1:
jsr PTRGET
NEXT2:
sta FORPNT
sty FORPNT+1
jsr GTFORPNT
beq NEXT3
ldx #$00
GERR:
beq JERROR
NEXT3:
txs
.ifndef CBM2_KBD
inx
inx
inx
inx
.endif
txa
.ifdef CBM2_KBD
clc
adc #$04
pha
adc #BYTES_FP+1
sta DEST
pla
.else
inx
inx
inx
inx
inx
.ifndef CONFIG_SMALL
inx
.endif
stx DEST
.endif
ldy #>STACK
jsr LOAD_FAC_FROM_YA
tsx
lda STACK+BYTES_FP+4,x
sta FACSIGN
lda FORPNT
ldy FORPNT+1
jsr FADD
jsr SETFOR
ldy #>STACK
jsr FCOMP2
tsx
sec
sbc STACK+BYTES_FP+4,x
beq L2C22
lda STACK+2*BYTES_FP+5,x
sta CURLIN
lda STACK+2*BYTES_FP+6,x
sta CURLIN+1
lda STACK+2*BYTES_FP+8,x
sta TXTPTR
lda STACK+2*BYTES_FP+7,x
sta TXTPTR+1
L2C1F:
jmp NEWSTT
L2C22:
txa
adc #2*BYTES_FP+7
tax
txs
jsr CHRGOT
cmp #$2C
bne L2C1F
jsr CHRGET
jsr NEXT1
FRMNUM:
jsr FRMEVL
CHKNUM:
clc
.byte $24
CHKSTR:
sec
CHKVAL:
bit VALTYP
bmi L2C41
bcs L2C43
L2C40:
rts
L2C41:
bcs L2C40
L2C43:
ldx #ERR_BADTYPE
JERROR:
jmp ERROR
FRMEVL:
ldx TXTPTR
bne L2C4E
dec TXTPTR+1
L2C4E:
dec TXTPTR
ldx #$00
.byte $24
FRMEVL1:
pha
txa
pha
lda #$01
jsr CHKMEM
jsr FRM_ELEMENT
lda #$00
sta CPRTYP
FRMEVL2:
jsr CHRGOT
L2C65:
sec
sbc #TOKEN_GREATER
bcc L2C81
cmp #$03
bcs L2C81
cmp #$01
rol a
eor #$01
eor CPRTYP
cmp CPRTYP
bcc SNTXERR
sta CPRTYP
jsr CHRGET
jmp L2C65
L2C81:
ldx CPRTYP
bne FRM_RELATIONAL
bcs L2D02
adc #$07
bcc L2D02
adc VALTYP
bne L2C92
jmp CAT
L2C92:
adc #$FF
sta INDEX
asl a
adc INDEX
tay
FRM_PRECEDENCE_TEST:
pla
cmp MATHTBL,y
bcs FRM_PERFORM1
jsr CHKNUM
L2CA3:
pha
L2CA4:
jsr FRM_RECURSE
pla
ldy LASTOP
bpl PREFNC
tax
beq GOEX
bne FRM_PERFORM2
FRM_RELATIONAL:
lsr VALTYP
txa
rol a
ldx TXTPTR
bne L2CBB
dec TXTPTR+1
L2CBB:
dec TXTPTR
ldy #$1B
sta CPRTYP
bne FRM_PRECEDENCE_TEST
PREFNC:
cmp MATHTBL,y
bcs FRM_PERFORM2
bcc L2CA3
FRM_RECURSE:
lda MATHTBL+2,y
pha
lda MATHTBL+1,y
pha
jsr FRM_STACK1
lda CPRTYP
jmp FRMEVL1
SNTXERR:
jmp SYNERR
FRM_STACK1:
lda FACSIGN
ldx MATHTBL,y
FRM_STACK2:
tay
pla
sta INDEX
.ifndef KBD
inc INDEX ; bug: assumes not on page boundary
.endif
pla
sta INDEX+1
.ifdef KBD
inc INDEX
bne LEB69
inc INDEX+1
LEB69:
.endif
tya
pha
L2CED:
jsr ROUND_FAC
.ifndef CONFIG_SMALL
lda FAC+4
pha
.endif
lda FAC+3
pha
lda FAC+2
pha
lda FAC+1
pha
lda FAC
pha
jmp (INDEX)
L2D02:
ldy #$FF
pla
GOEX:
beq EXIT
FRM_PERFORM1:
cmp #$64
beq L2D0E
jsr CHKNUM
L2D0E:
sty LASTOP
FRM_PERFORM2:
pla
lsr a
sta CPRMASK
pla
sta ARG
pla
sta ARG+1
pla
sta ARG+2
pla
sta ARG+3
pla
.ifndef CONFIG_SMALL
sta ARG+4
pla
.endif
sta ARGSIGN
eor FACSIGN
sta STRNG1
EXIT:
lda FAC
rts
FRM_ELEMENT:
lda #$00
sta VALTYP
L2D31:
jsr CHRGET
bcs L2D39
L2D36:
jmp FIN
L2D39:
jsr ISLETC
bcs FRM_VARIABLE
.ifdef CONFIG_CBM_ALL
cmp #$FF
bne LCDC1
lda #<CON_PI
ldy #>CON_PI
jsr LOAD_FAC_FROM_YA
jmp CHRGET
CON_PI:
.byte $82,$49,$0f,$DA,$A1
LCDC1:
.endif
cmp #$2E
beq L2D36
cmp #TOKEN_MINUS
beq MIN
cmp #TOKEN_PLUS
beq L2D31
cmp #$22
bne NOT_
STRTXT:
lda TXTPTR
ldy TXTPTR+1
adc #$00
bcc L2D57
iny
L2D57:
jsr STRLIT
jmp POINT
NOT_:
cmp #TOKEN_NOT
bne L2D74
ldy #$18
bne EQUL
EQUOP:
jsr AYINT
lda FAC_LAST
eor #$FF
tay
lda FAC_LAST-1
eor #$FF
jmp GIVAYF
L2D74:
cmp #TOKEN_FN
bne L2D7B
jmp L31F3
L2D7B:
cmp #TOKEN_SGN
bcc PARCHK
jmp UNARY
PARCHK:
jsr CHKOPN
jsr FRMEVL
CHKCLS:
lda #$29
.byte $2C
CHKOPN:
lda #$28
.byte $2C
CHKCOM:
lda #$2C
SYNCHR: ; XXX all CBM code calls SYNCHR instead of CHKCOM
ldy #$00
cmp (TXTPTR),y
bne SYNERR
jmp CHRGET
SYNERR:
ldx #ERR_SYNTAX
jmp ERROR
MIN:
ldy #$15
EQUL:
pla
pla
jmp L2CA4
FRM_VARIABLE:
jsr PTRGET
FRM_VARIABLE_CALL = *-1
sta FAC_LAST-1
sty FAC_LAST
.ifdef CONFIG_CBM_ALL
lda VARNAM
ldy VARNAM+1
.endif
ldx VALTYP
beq L2DB1
.ifdef CONFIG_CBM_ALL
.ifdef CONFIG_CBM1_PATCHES
jmp PATCH2
clc
LCE3B:
.else
ldx #$00
stx $6D
bit $62
bpl LCE53
cmp #$54
bne LCE53
.endif
cpy #$C9
bne LCE53
jsr LCE76
sty EXPON
dey
sty STRNG2
ldy #$06
sty INDX
ldy #$24
jsr LDD3A
jmp LD353
LCE53:
.endif
.ifdef KBD
ldx #$00
stx STRNG1+1
.endif
rts
L2DB1:
.ifndef CONFIG_SMALL
ldx VALTYP+1
bpl L2DC2
ldy #$00
lda (FAC+3),y
tax
iny
lda (FAC+3),y
tay
txa
jmp GIVAYF
L2DC2:
.endif
.ifdef CONFIG_CBM1_PATCHES
jmp PATCH3
.endif
.ifdef CBM2
bit $62
bpl LCE90
cmp #$54
bne LCE82
.endif
.ifndef CONFIG_CBM_ALL
jmp LOAD_FAC_FROM_YA
.endif
.ifdef CBM1
.byte $19
.endif
.ifdef CONFIG_CBM_ALL
LCE69:
cpy #$49
.ifdef CBM1
bne LCE82
.else
bne LCE90
.endif
jsr LCE76
tya
ldx #$A0
jmp LDB21
LCE76:
.ifdef CBM1
lda #$FE
ldy #$01
.else
lda #$8B
ldy #$00
.endif
sei
jsr LOAD_FAC_FROM_YA
cli
sty FAC+1
rts
LCE82:
cmp #$53
bne LCE90
cpy #$54
bne LCE90
lda Z96
jmp FLOAT
LCE90:
lda FAC+3
ldy FAC+4
jmp LOAD_FAC_FROM_YA
.endif
UNARY:
asl a
pha
tax
jsr CHRGET
cpx #<(TOKEN_LEFTSTR*2-1)
bcc L2DEF
jsr CHKOPN
jsr FRMEVL
jsr CHKCOM
jsr CHKSTR
pla
tax
lda FAC_LAST
pha
lda FAC_LAST-1
pha
txa
pha
jsr GETBYT
pla
tay
txa
pha
jmp L2DF4
L2DEF:
jsr PARCHK
pla
tay
L2DF4:
lda UNFNC-TOKEN_SGN-TOKEN_SGN+$100,y
sta JMPADRS+1
lda UNFNC-TOKEN_SGN-TOKEN_SGN+$101,y
sta JMPADRS+2
.ifdef KBD
jsr LF47D
.else
jsr JMPADRS
.endif
jmp CHKNUM
OR:
ldy #$FF
.byte $2C
TAND:
ldy #$00
sty EOLPNTR
jsr AYINT
lda FAC_LAST-1
eor EOLPNTR
sta CHARAC
lda FAC_LAST
eor EOLPNTR
sta ENDCHR
jsr COPY_ARG_TO_FAC
jsr AYINT
lda FAC_LAST
eor EOLPNTR
and ENDCHR
eor EOLPNTR
tay
lda FAC_LAST-1
eor EOLPNTR
and CHARAC
eor EOLPNTR
jmp GIVAYF
RELOPS:
jsr CHKVAL
bcs STRCMP
lda ARGSIGN
ora #$7F
and ARG+1
sta ARG+1
lda #<ARG
ldy #$00
jsr FCOMP
tax
jmp NUMCMP
STRCMP:
lda #$00
sta VALTYP
dec CPRTYP
jsr FREFAC
sta FAC
stx FAC+1
sty FAC+2
lda ARG_LAST-1
ldy ARG_LAST
jsr FRETMP
stx ARG_LAST-1
sty ARG_LAST
tax
sec
sbc FAC
beq L2E74
lda #$01
bcc L2E74
ldx FAC
lda #$FF
L2E74:
sta FACSIGN
ldy #$FF
inx
STRCMP1:
iny
dex
bne L2E84
ldx FACSIGN
NUMCMP:
bmi CMPDONE
clc
bcc CMPDONE
L2E84:
lda (ARG_LAST-1),y
cmp (FAC+1),y
beq STRCMP1
ldx #$FF
bcs CMPDONE
ldx #$01
CMPDONE:
inx
txa
rol a
and CPRMASK
beq L2E99
lda #$FF
L2E99:
jmp FLOAT
NXDIM:
jsr CHKCOM
DIM:
tax
jsr PTRGET2
jsr CHRGOT
bne NXDIM
rts
PTRGET:
ldx #$00
jsr CHRGOT
PTRGET2:
stx DIMFLG
PTRGET3:
sta VARNAM
jsr CHRGOT
jsr ISLETC
bcs NAMOK
SYNERR3:
jmp SYNERR
NAMOK:
ldx #$00
stx VALTYP
.ifndef CONFIG_SMALL
stx VALTYP+1
.endif
jsr CHRGET
bcc L2ECD
jsr ISLETC
bcc L2ED8
L2ECD:
tax
L2ECE:
jsr CHRGET
bcc L2ECE
jsr ISLETC
bcs L2ECE
L2ED8:
cmp #$24
.ifdef CONFIG_SMALL
bne L2EF9
.else
bne L2EE2
.endif
lda #$FF
sta VALTYP
.ifndef CONFIG_SMALL
bne L2EF2
L2EE2:
cmp #$25
bne L2EF9
lda SUBFLG
bne SYNERR3
lda #$80
sta VALTYP+1
ora VARNAM
sta VARNAM
L2EF2:
.endif
txa
ora #$80
tax
jsr CHRGET
L2EF9:
stx VARNAM+1
sec
ora SUBFLG
sbc #$28
bne L2F05
jmp ARRAY
L2F05:
lda #$00
sta SUBFLG
lda VARTAB
ldx VARTAB+1
ldy #$00
L2F0F:
stx LOWTR+1
L2F11:
sta LOWTR
cpx ARYTAB+1
bne L2F1B
cmp ARYTAB
beq NAMENOTFOUND
L2F1B:
lda VARNAM
cmp (LOWTR),y
bne L2F29
lda VARNAM+1
iny
cmp (LOWTR),y
beq SET_VARPNT_AND_YA
dey
L2F29:
clc
lda LOWTR
adc #BYTES_PER_VARIABLE
bcc L2F11
inx
bne L2F0F
ISLETC:
cmp #$41
bcc L2F3C
sbc #$5B
sec
sbc #$A5
L2F3C:
rts
NAMENOTFOUND:
pla
pha
cmp #<FRM_VARIABLE_CALL
bne MAKENEWVARIABLE
.ifdef CONFIG_SAFE_NAMENOTFOUND
tsx
lda STACK+2,x
cmp #>FRM_VARIABLE_CALL
bne MAKENEWVARIABLE
.endif
LD015:
lda #<C_ZERO
ldy #>C_ZERO
rts
.ifndef CBM2_KBD
C_ZERO:
.byte $00,$00
.endif
MAKENEWVARIABLE:
.ifdef CONFIG_CBM_ALL
lda VARNAM
ldy VARNAM+1
cmp #$54
bne LD02F
cpy #$C9
beq LD015
cpy #$49
bne LD02F
LD02C:
jmp SYNERR
LD02F:
cmp #$53
bne LD037
cpy #$54
beq LD02C
LD037:
.endif
lda ARYTAB
ldy ARYTAB+1
sta LOWTR
sty LOWTR+1
lda STREND
ldy STREND+1
sta HIGHTR
sty HIGHTR+1
clc
adc #BYTES_PER_VARIABLE
bcc L2F68
iny
L2F68:
sta HIGHDS
sty HIGHDS+1
jsr BLTU
lda HIGHDS
ldy HIGHDS+1
iny
sta ARYTAB
sty ARYTAB+1
ldy #$00
lda VARNAM
sta (LOWTR),y
iny
lda VARNAM+1
sta (LOWTR),y
lda #$00
iny
sta (LOWTR),y
iny
sta (LOWTR),y
iny
sta (LOWTR),y
iny
sta (LOWTR),y
.ifndef CONFIG_SMALL
iny
sta (LOWTR),y
.endif
SET_VARPNT_AND_YA:
lda LOWTR
clc
adc #$02
ldy LOWTR+1
bcc L2F9E
iny
L2F9E:
sta VARPNT
sty VARPNT+1
rts
GETARY:
lda EOLPNTR
asl a
adc #$05
adc LOWTR
ldy LOWTR+1
bcc L2FAF
iny
L2FAF:
sta HIGHDS
sty HIGHDS+1
rts
NEG32768:
.byte $90,$80,$00,$00
MAKINT:
jsr CHRGET
.ifdef CBM2_KBD
jsr FRMEVL
.else
jsr FRMNUM
.endif
MKINT:
.ifdef CBM2_KBD
jsr CHKNUM
.endif
lda FACSIGN
bmi MI1
AYINT:
lda FAC
cmp #$90
bcc MI2
lda #<NEG32768
ldy #>NEG32768
jsr FCOMP
MI1:
bne IQERR
MI2:
jmp QINT
ARRAY:
lda DIMFLG
.ifndef CONFIG_SMALL
ora VALTYP+1
.endif
pha
lda VALTYP
pha
ldy #$00
L2FDE:
tya
pha
lda VARNAM+1
pha
lda VARNAM
pha
jsr MAKINT
pla
sta VARNAM
pla
sta VARNAM+1
pla
tay
tsx
lda STACK+2,x
pha
lda STACK+1,x
pha
lda FAC_LAST-1
sta STACK+2,x
lda FAC_LAST
sta STACK+1,x
iny
jsr CHRGOT
cmp #$2C
beq L2FDE
sty EOLPNTR
jsr CHKCLS
pla
sta VALTYP
pla
.ifndef CONFIG_SMALL
sta VALTYP+1
and #$7F
.endif
sta DIMFLG
ldx ARYTAB
lda ARYTAB+1
L301F:
stx LOWTR
sta LOWTR+1
cmp STREND+1
bne L302B
cpx STREND
beq MAKE_NEW_ARRAY
L302B:
ldy #$00
lda (LOWTR),y
iny
cmp VARNAM
bne L303A
lda VARNAM+1
cmp (LOWTR),y
beq USE_OLD_ARRAY
L303A:
iny
lda (LOWTR),y
clc
adc LOWTR
tax
iny
lda (LOWTR),y
adc LOWTR+1
bcc L301F
SUBERR:
ldx #ERR_BADSUBS
.byte $2C
IQERR:
ldx #ERR_ILLQTY
JER:
jmp ERROR
USE_OLD_ARRAY:
ldx #ERR_REDIMD
lda DIMFLG
bne JER
jsr GETARY
lda EOLPNTR
ldy #$04
cmp (LOWTR),y
bne SUBERR
jmp FIND_ARRAY_ELEMENT
MAKE_NEW_ARRAY:
jsr GETARY
jsr REASON
lda #$00
tay
sta STRNG2+1
ldx #BYTES_PER_ELEMENT
.ifdef OSI
stx STRNG2
.endif
lda VARNAM
sta (LOWTR),y
.ifndef CONFIG_SMALL
bpl L3078
dex
L3078:
.endif
iny
lda VARNAM+1
sta (LOWTR),y
.ifndef OSI
bpl L3081
dex
.ifndef KBD
dex
.endif
L3081:
stx STRNG2
.endif
lda EOLPNTR
iny
iny
iny
sta (LOWTR),y
L308A:
ldx #$0B
lda #$00
bit DIMFLG
bvc L309A
pla
clc
adc #$01
tax
pla
adc #$00
L309A:
iny
sta (LOWTR),y
iny
txa
sta (LOWTR),y
jsr MULTIPLY_SUBSCRIPT
stx STRNG2
sta STRNG2+1
ldy INDEX
dec EOLPNTR
bne L308A
adc HIGHDS+1
bcs GME
sta HIGHDS+1
tay
txa
adc HIGHDS
bcc L30BD
iny
beq GME
L30BD:
jsr REASON
sta STREND
sty STREND+1
lda #$00
inc STRNG2+1
ldy STRNG2
beq L30D1
L30CC:
dey
sta (HIGHDS),y
bne L30CC
L30D1:
dec HIGHDS+1
dec STRNG2+1
bne L30CC
inc HIGHDS+1
sec
lda STREND
sbc LOWTR
ldy #$02
sta (LOWTR),y
lda STREND+1
iny
sbc LOWTR+1
sta (LOWTR),y
lda DIMFLG
bne RTS9
iny
FIND_ARRAY_ELEMENT:
lda (LOWTR),y
sta EOLPNTR
lda #$00
sta STRNG2
L30F6:
sta STRNG2+1
iny
pla
tax
sta FAC_LAST-1
pla
sta FAC_LAST
cmp (LOWTR),y
bcc FAE2
bne GSE
iny
txa
cmp (LOWTR),y
bcc FAE3
GSE:
jmp SUBERR
GME:
jmp MEMERR
FAE2:
iny
FAE3:
lda STRNG2+1
ora STRNG2
clc
beq L3124
jsr MULTIPLY_SUBSCRIPT
txa
adc FAC_LAST-1
tax
tya
ldy INDEX
L3124:
adc FAC_LAST
stx STRNG2
dec EOLPNTR
bne L30F6
.ifdef OSI
asl STRNG2
rol a
bcs GSE
asl STRNG2
rol a
bcs GSE
tay
lda STRNG2
.else
.ifndef CBM1_APPLE
sta STRNG2+1
.endif
ldx #BYTES_FP
.ifdef KBD
lda VARNAM+1
.else
lda VARNAM
.endif
bpl L3135
dex
L3135:
.ifndef KBD
lda VARNAM+1
bpl L313B
dex
dex
L313B:
.endif
.ifdef KBD
stx RESULT+1
.else
stx RESULT+2
.endif
lda #$00
jsr MULTIPLY_SUBS1
txa
.endif
adc HIGHDS
sta VARPNT
tya
adc HIGHDS+1
sta VARPNT+1
tay
lda VARPNT
RTS9:
rts
MULTIPLY_SUBSCRIPT:
sty INDEX
lda (LOWTR),y
sta RESULT_LAST-2
dey
lda (LOWTR),y
MULTIPLY_SUBS1:
sta RESULT_LAST-1
lda #$10
sta INDX
ldx #$00
ldy #$00
L3163:
txa
asl a
tax
tya
rol a
tay
bcs GME
asl STRNG2
rol STRNG2+1
bcc L317C
clc
txa
adc RESULT_LAST-2
tax
tya
adc RESULT_LAST-1
tay
bcs GME
L317C:
dec INDX
bne L3163
rts
FRE:
lda VALTYP
beq L3188
jsr FREFAC
L3188:
jsr GARBAG
sec
lda FRETOP
sbc STREND
tay
lda FRETOP+1
sbc STREND+1
GIVAYF:
ldx #$00
stx VALTYP
sta FAC+1
sty FAC+2
ldx #$90
jmp FLOAT1
POS:
ldy Z16
SNGFLT:
lda #$00
beq GIVAYF
ERRDIR:
ldx CURLIN+1
inx
bne RTS9
ldx #ERR_ILLDIR
.ifdef CBM2_KBD
.byte $2C
LD288:
ldx #ERR_UNDEFFN
.endif
L31AF:
jmp ERROR
DEF:
jsr FNC
jsr ERRDIR
jsr CHKOPN
lda #$80
sta SUBFLG
jsr PTRGET
jsr CHKNUM
jsr CHKCLS
lda #TOKEN_EQUAL
jsr SYNCHR
.ifndef CONFIG_SMALL
pha
.endif
lda VARPNT+1
pha
lda VARPNT
pha
lda TXTPTR+1
pha
lda TXTPTR
pha
jsr DATA
jmp L3250
FNC:
lda #TOKEN_FN
jsr SYNCHR
ora #$80
sta SUBFLG
jsr PTRGET3
sta FNCNAM
sty FNCNAM+1
jmp CHKNUM
L31F3:
jsr FNC
lda FNCNAM+1
pha
lda FNCNAM
pha
jsr PARCHK
jsr CHKNUM
pla
sta FNCNAM
pla
sta FNCNAM+1
ldy #$02
.ifndef CBM2_KBD
ldx #ERR_UNDEFFN
.endif
lda (FNCNAM),y
.ifndef CBM2_KBD
beq L31AF
.endif
sta VARPNT
tax
iny
lda (FNCNAM),y
.ifdef CBM2_KBD
beq LD288
.endif
sta VARPNT+1
.ifndef CONFIG_SMALL
iny
.endif
L3219:
lda (VARPNT),y
pha
dey
bpl L3219
ldy VARPNT+1
jsr STORE_FAC_AT_YX_ROUNDED
lda TXTPTR+1
pha
lda TXTPTR
pha
lda (FNCNAM),y
sta TXTPTR
iny
lda (FNCNAM),y
sta TXTPTR+1
lda VARPNT+1
pha
lda VARPNT
pha
jsr FRMNUM
pla
sta FNCNAM
pla
sta FNCNAM+1
jsr CHRGOT
beq L324A
jmp SYNERR
L324A:
pla
sta TXTPTR
pla
sta TXTPTR+1
L3250:
ldy #$00
pla
sta (FNCNAM),y
pla
iny
sta (FNCNAM),y
pla
iny
sta (FNCNAM),y
pla
iny
sta (FNCNAM),y
.ifndef CONFIG_SMALL
pla
iny
sta (FNCNAM),y
.endif
rts
STR:
jsr CHKNUM
ldy #$00
jsr FOUT1
pla
pla
LD353:
lda #$FF
ldy #$00
beq STRLIT
STRINI:
ldx FAC_LAST-1
ldy FAC_LAST
stx DSCPTR
sty DSCPTR+1
STRSPA:
jsr GETSPA
stx FAC+1
sty FAC+2
sta FAC
rts
STRLIT:
ldx #$22
stx CHARAC
stx ENDCHR
STRLT2:
sta STRNG1
sty STRNG1+1
sta FAC+1
sty FAC+2
ldy #$FF
L3298:
iny
lda (STRNG1),y
beq L32A9
cmp CHARAC
beq L32A5
cmp ENDCHR
bne L3298
L32A5:
cmp #$22
beq L32AA
L32A9:
clc
L32AA:
sty FAC
tya
adc STRNG1
sta STRNG2
ldx STRNG1+1
bcc L32B6
inx
L32B6:
stx STRNG2+1
lda STRNG1+1
.if INPUTBUFFER >= $0100
beq LD399
cmp #>INPUTBUFFER
.endif
bne PUTNEW
LD399:
tya
jsr STRINI
ldx STRNG1
ldy STRNG1+1
jsr MOVSTR
PUTNEW:
ldx TEMPPT
cpx #TEMPST+9
bne PUTEMP
ldx #ERR_FRMCPX
JERR:
jmp ERROR
PUTEMP:
lda FAC
sta 0,x
lda FAC+1
sta 1,x
lda FAC+2
sta 2,x
ldy #$00
stx FAC_LAST-1
sty FAC_LAST
.ifdef CBM2_KBD
sty FACEXTENSION
.endif
dey
sty VALTYP
stx LASTPT
inx
inx
inx
stx TEMPPT
rts
GETSPA:
lsr DATAFLG
L32F1:
pha
eor #$FF
sec
adc FRETOP
ldy FRETOP+1
bcs L32FC
dey
L32FC:
cpy STREND+1
bcc L3311
bne L3306
cmp STREND
bcc L3311
L3306:
sta FRETOP
sty FRETOP+1
sta FRESPC
sty FRESPC+1
tax
pla
rts
L3311:
ldx #ERR_MEMFULL
lda DATAFLG
bmi JERR
jsr GARBAG
lda #$80
sta DATAFLG
pla
bne L32F1
GARBAG:
.ifdef KBD
ldx #<CONST_MEMSIZ
lda #>CONST_MEMSIZ
.else
ldx MEMSIZ
lda MEMSIZ+1
.endif
FINDHIGHESTSTRING:
stx FRETOP
sta FRETOP+1
ldy #$00
sty FNCNAM+1
.ifdef CBM2_KBD
sty FNCNAM
.endif
lda STREND
ldx STREND+1
sta LOWTR
stx LOWTR+1
lda #TEMPST
ldx #$00
sta INDEX
stx INDEX+1
L333D:
cmp TEMPPT
beq L3346
jsr CHECK_VARIABLE
beq L333D
L3346:
lda #BYTES_PER_VARIABLE
sta DSCLEN
lda VARTAB
ldx VARTAB+1
sta INDEX
stx INDEX+1
L3352:
cpx ARYTAB+1
bne L335A
cmp ARYTAB
beq L335F
L335A:
jsr CHECK_SIMPLE_VARIABLE
beq L3352
L335F:
sta HIGHDS
stx HIGHDS+1
lda #$03
sta DSCLEN
L3367:
lda HIGHDS
ldx HIGHDS+1
L336B:
cpx STREND+1
bne L3376
cmp STREND
bne L3376
jmp MOVE_HIGHEST_STRING_TO_TOP
L3376:
sta INDEX
stx INDEX+1
.ifdef CONFIG_SMALL
ldy #$01
.else
ldy #$00
lda (INDEX),y
tax
iny
.endif
lda (INDEX),y
php
iny
lda (INDEX),y
adc HIGHDS
sta HIGHDS
iny
lda (INDEX),y
adc HIGHDS+1
sta HIGHDS+1
plp
bpl L3367
.ifndef CONFIG_SMALL
txa
bmi L3367
.endif
iny
lda (INDEX),y
.ifdef KBD
ldy #$00
.endif
.ifdef CBM1
jsr LE7F3
.else
.ifndef CONFIG_SMALL
ldy #$00
.endif
asl a
adc #$05
.endif
adc INDEX
sta INDEX
bcc L33A7
inc INDEX+1
L33A7:
ldx INDEX+1
L33A9:
cpx HIGHDS+1
bne L33B1
cmp HIGHDS
beq L336B
L33B1:
jsr CHECK_VARIABLE
beq L33A9
CHECK_SIMPLE_VARIABLE:
.ifndef CONFIG_SMALL
lda (INDEX),y
bmi CHECK_BUMP
.endif
iny
lda (INDEX),y
bpl CHECK_BUMP
iny
CHECK_VARIABLE:
lda (INDEX),y
beq CHECK_BUMP
iny
lda (INDEX),y
tax
iny
lda (INDEX),y
cmp FRETOP+1
bcc L33D5
bne CHECK_BUMP
cpx FRETOP
bcs CHECK_BUMP
L33D5:
cmp LOWTR+1
bcc CHECK_BUMP
bne L33DF
cpx LOWTR
bcc CHECK_BUMP
L33DF:
stx LOWTR
sta LOWTR+1
lda INDEX
ldx INDEX+1
sta FNCNAM
stx FNCNAM+1
lda DSCLEN
sta Z52
CHECK_BUMP:
lda DSCLEN
clc
adc INDEX
sta INDEX
bcc L33FA
inc INDEX+1
L33FA:
ldx INDEX+1
ldy #$00
rts
MOVE_HIGHEST_STRING_TO_TOP:
.ifdef CBM2_KBD
lda FNCNAM+1
ora FNCNAM
.else
ldx FNCNAM+1
.endif
beq L33FA
lda Z52
.ifdef CBM1
sbc #$03
.else
and #$04
.endif
lsr a
tay
sta Z52
lda (FNCNAM),y
adc LOWTR
sta HIGHTR
lda LOWTR+1
adc #$00
sta HIGHTR+1
lda FRETOP
ldx FRETOP+1
sta HIGHDS
stx HIGHDS+1
jsr BLTU2
ldy Z52
iny
lda HIGHDS
sta (FNCNAM),y
tax
inc HIGHDS+1
lda HIGHDS+1
iny
sta (FNCNAM),y
jmp FINDHIGHESTSTRING
CAT:
lda FAC_LAST
pha
lda FAC_LAST-1
pha
jsr FRM_ELEMENT
jsr CHKSTR
pla
sta STRNG1
pla
sta STRNG1+1
ldy #$00
lda (STRNG1),y
clc
adc (FAC_LAST-1),y
bcc L3454
ldx #ERR_STRLONG
jmp ERROR
L3454:
jsr STRINI
jsr MOVINS
lda DSCPTR
ldy DSCPTR+1
jsr FRETMP
jsr MOVSTR1
lda STRNG1
ldy STRNG1+1
jsr FRETMP
jsr PUTNEW
jmp FRMEVL2
MOVINS:
ldy #$00
lda (STRNG1),y
pha
iny
lda (STRNG1),y
tax
iny
lda (STRNG1),y
tay
pla
MOVSTR:
stx INDEX
sty INDEX+1
MOVSTR1:
tay
beq L3490
pha
L3487:
dey
lda (INDEX),y
sta (FRESPC),y
tya
bne L3487
pla
L3490:
clc
adc FRESPC
sta FRESPC
bcc L3499
inc FRESPC+1
L3499:
rts
FRESTR:
jsr CHKSTR
FREFAC:
lda FAC_LAST-1
ldy FAC_LAST
FRETMP:
sta INDEX
sty INDEX+1
jsr FRETMS
php
ldy #$00
lda (INDEX),y
pha
iny
lda (INDEX),y
tax
iny
lda (INDEX),y
tay
pla
plp
bne L34CD
cpy FRETOP+1
bne L34CD
cpx FRETOP
bne L34CD
pha
clc
adc FRETOP
sta FRETOP
bcc L34CC
inc FRETOP+1
L34CC:
pla
L34CD:
stx INDEX
sty INDEX+1
rts
FRETMS:
.ifdef KBD
cpy #$00
.else
cpy LASTPT+1
.endif
bne L34E2
cmp LASTPT
bne L34E2
sta TEMPPT
sbc #$03
sta LASTPT
ldy #$00
L34E2:
rts
CHRSTR:
jsr CONINT
txa
pha
lda #$01
jsr STRSPA
pla
ldy #$00
sta (FAC+1),y
pla
pla
jmp PUTNEW
LEFTSTR:
jsr SUBSTRING_SETUP
cmp (DSCPTR),y
tya
SUBSTRING1:
bcc L3503
lda (DSCPTR),y
tax
tya
L3503:
pha
SUBSTRING2:
txa
SUBSTRING3:
pha
jsr STRSPA
lda DSCPTR
ldy DSCPTR+1
jsr FRETMP
pla
tay
pla
clc
adc INDEX
sta INDEX
bcc L351C
inc INDEX+1
L351C:
tya
jsr MOVSTR1
jmp PUTNEW
RIGHTSTR:
jsr SUBSTRING_SETUP
clc
sbc (DSCPTR),y
eor #$FF
jmp SUBSTRING1
MIDSTR:
lda #$FF
sta FAC_LAST
jsr CHRGOT
cmp #$29
beq L353F
jsr CHKCOM
jsr GETBYT
L353F:
jsr SUBSTRING_SETUP
.ifdef CBM2_KBD
beq GOIQ
.endif
dex
txa
pha
clc
ldx #$00
sbc (DSCPTR),y
bcs SUBSTRING2
eor #$FF
cmp FAC_LAST
bcc SUBSTRING3
lda FAC_LAST
bcs SUBSTRING3
SUBSTRING_SETUP:
jsr CHKCLS
pla
.ifndef CONFIG_11
sta JMPADRS+1
pla
sta JMPADRS+2
.else
tay
pla
sta Z52
.endif
pla
pla
pla
tax
pla
sta DSCPTR
pla
sta DSCPTR+1
.ifdef CONFIG_11
lda Z52
pha
tya
pha
.endif
ldy #$00
txa
.ifndef CBM2_KBD
beq GOIQ
.endif
.ifndef CONFIG_11
inc JMPADRS+1
jmp (JMPADRS+1)
.else
rts
.endif
LEN:
jsr GETSTR
SNGFLT1:
jmp SNGFLT
GETSTR:
jsr FRESTR
ldx #$00
stx VALTYP
tay
rts
ASC:
jsr GETSTR
beq GOIQ
ldy #$00
lda (INDEX),y
tay
.ifndef CONFIG_11_NOAPPLE
jmp SNGFLT1
.else
jmp SNGFLT
.endif
GOIQ:
jmp IQERR
GTBYTC:
jsr CHRGET
GETBYT:
jsr FRMNUM
CONINT:
jsr MKINT
ldx FAC_LAST-1
bne GOIQ
ldx FAC_LAST
jmp CHRGOT
VAL:
jsr GETSTR
bne L35AC
jmp ZERO_FAC
L35AC:
ldx TXTPTR
ldy TXTPTR+1
stx STRNG2
sty STRNG2+1
ldx INDEX
stx TXTPTR
clc
adc INDEX
sta DEST
ldx INDEX+1
stx TXTPTR+1
bcc L35C4
inx
L35C4:
stx DEST+1
ldy #$00
lda (DEST),y
pha
lda #$00
sta (DEST),y
jsr CHRGOT
jsr FIN
pla
ldy #$00
sta (DEST),y
POINT:
ldx STRNG2
ldy STRNG2+1
stx TXTPTR
sty TXTPTR+1
rts
.ifdef KBD
LF422:
lda VARTAB
sec
sbc #$02
ldy VARTAB+1
bcs LF42C
dey
LF42C:
rts
LF42D:
lda Z00,x
LF430:
cmp #$61
bcc LF43A
cmp #$7B
bcs LF43A
LF438:
sbc #$1F
LF43A:
rts
LF43B:
ldx #$5D
LF43D:
txa
and #$7F
cmp $0340
beq LF44D
sta $0340
lda #$03
jsr LDE48
LF44D:
jsr LDE7F
bne RTS4
cpx #$80
bcc LF44D
RTS4:
rts
LF457:
lda TXTTAB
ldx TXTTAB+1
LF45B:
sta JMPADRS+1
stx JMPADRS+2
ldy #$01
lda (JMPADRS+1),y
beq LF438
iny
iny
lda (JMPADRS+1),y
dey
cmp $14
bne LF472
lda (JMPADRS+1),y
cmp $13
LF472:
bcs LF43A
dey
lda (JMPADRS+1),y
tax
dey
lda (JMPADRS+1),y
bcc LF45B
LF47D:
jmp (JMPADRS+1)
.else
GTNUM:
jsr FRMNUM
jsr GETADR
COMBYTE:
jsr CHKCOM
jmp GETBYT
GETADR:
lda FACSIGN
.ifdef APPLE
nop
nop
.else
bmi GOIQ
.endif
lda FAC
cmp #$91
bcs GOIQ
jsr QINT
lda FAC_LAST-1
ldy FAC_LAST
sty LINNUM
sta LINNUM+1
rts
PEEK:
.ifdef CBM2_KBD
lda $12
pha
lda $11
pha
.endif
jsr GETADR
ldy #$00
.ifdef CBM1
cmp #$C0
bcc LD6F3
cmp #$E1
bcc LD6F6
LD6F3:
.endif
.ifdef CBM2_KBD
nop
nop
nop
nop
nop
nop
nop
nop
.endif
lda (LINNUM),y
tay
.ifdef CBM2_KBD
pla
sta $11
pla
sta $12
.endif
LD6F6:
jmp SNGFLT
POKE:
jsr GTNUM
txa
ldy #$00
sta (LINNUM),y
rts
WAIT:
jsr GTNUM
stx FORPNT
ldx #$00
jsr CHRGOT
.ifdef CBM2
beq EASTER_EGG
.else
beq L3628
.endif
jsr COMBYTE
L3628:
stx FORPNT+1
ldy #$00
L362C:
lda (LINNUM),y
eor FORPNT+1
and FORPNT
beq L362C
RTS3:
rts
.endif
.include "float.s"
.include "chrget.s"
.include "rnd.s"
.include "trig.s"
.include "init.s"