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msbasic/misc1.s at master · Kilynho/msbasic · GitHub
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Kilynho
msbasic
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misc1.s
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misc1.s
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.segment
"CODE"
; ----------------------------------------------------------------------------
; CONVERT LINE NUMBER
; ----------------------------------------------------------------------------
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" STATEMENT
;
; LET <VAR> = <EXP>
; <VAR> = <EXP>
; ----------------------------------------------------------------------------
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
; ----------------------------------------------------------------------------
; REAL VARIABLE = EXPRESSION
; ----------------------------------------------------------------------------
jmp
SETFOR
LETSTRING:
.ifndef
CONFIG_SMALL
pla
.endif
; ----------------------------------------------------------------------------
; INSTALL STRING, DESCRIPTOR ADDRESS IS AT FAC+3,4
; ----------------------------------------------------------------------------
PUTSTR:
.ifdef
CONFIG_CBM_ALL
ldy FORPNT+
1
.ifdef CBM1
cpy #
$D0
; TI$
.else
cpy #
$DE
.
endif
bne
LC92B
jsr
FREFAC
cmp
#
$06
.ifdef CBM2
bne
IQERR1
.else
jne IQERR
.
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
sta TISTR,x
dex
bpl
LC912
cli
rts
LC91C:
lda (INDEX),y
jsr
CHRGOT2
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
RET5:
rts
.ifdef
AIM65
LB89D:
cmp
#
$21
bne
RET5
lda #
$80
sta PRIFLG
jmp
CHRGET
.endif
.ifdef
CONFIG_FILE
PRINTH:
jsr
CMD
jmp
LCAD6
CMD:
jsr
GETBYT
beq
LC98F
lda #
$2C
jsr
SYNCHR
LC98F:
php
jsr
CHKOUT
stx CURDVC
plp
jmp
PRINT
.endif
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