split up flow.s

This commit is contained in:
Michael Steil 2008-10-18 07:43:05 +00:00
parent df3ceaa06c
commit e8a3a5418f
4 changed files with 229 additions and 226 deletions

View File

@ -367,228 +367,3 @@ CLEAR:
bne RET1 bne RET1
jmp CLEARC jmp CLEARC
.endif .endif
.ifdef APPLE
.include "apple_loadsave.s"
.endif
.ifdef KIM
.include "kim_loadsave.s"
.endif
.ifdef MICROTAN
.include "microtan_loadsave.s"
.endif
; ----------------------------------------------------------------------------
; "RUN" COMMAND
; ----------------------------------------------------------------------------
RUN:
bne L27CF
jmp SETPTRS
L27CF:
jsr CLEARC
jmp L27E9
; ----------------------------------------------------------------------------
; "GOSUB" STATEMENT
;
; LEAVES 7 BYTES ON STACK:
; 2 -- RETURN ADDRESS (NEWSTT)
; 2 -- TXTPTR
; 2 -- LINE #
; 1 -- GOSUB TOKEN
; ----------------------------------------------------------------------------
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" STATEMENT
; ALSO USED BY "RUN" AND "GOSUB"
; ----------------------------------------------------------------------------
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 #$00
sta TXTPTR+1
L281E:
rts
; ----------------------------------------------------------------------------
; "POP" AND "RETURN" STATEMENTS
; ----------------------------------------------------------------------------
POP:
bne L281E
lda #$FF
.ifdef CONFIG_2
sta FORPNT+1 ; bugfix, wrong in AppleSoft II
.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" STATEMENT
; EXECUTED BY SKIPPING TO NEXT COLON OR EOL
; ----------------------------------------------------------------------------
DATA:
jsr DATAN
; ----------------------------------------------------------------------------
; ADD (Y) TO TXTPTR
; ----------------------------------------------------------------------------
ADDON:
tya
clc
adc TXTPTR
sta TXTPTR
bcc L2852
inc TXTPTR+1
L2852:
rts
; ----------------------------------------------------------------------------
; SCAN AHEAD TO NEXT ":" OR EOL
; ----------------------------------------------------------------------------
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" STATEMENT
; ----------------------------------------------------------------------------
IF:
jsr FRMEVL
jsr CHRGOT
cmp #TOKEN_GOTO
beq L2884
lda #TOKEN_THEN
jsr SYNCHR
L2884:
lda FAC
bne L288D
; ----------------------------------------------------------------------------
; "REM" STATEMENT, OR FALSE "IF" STATEMENT
; ----------------------------------------------------------------------------
REM:
jsr REMN
beq ADDON
L288D:
jsr CHRGOT
bcs L2895
jmp GOTO
L2895:
jmp EXECUTE_STATEMENT
; ----------------------------------------------------------------------------
; "ON" STATEMENT
;
; ON <EXP> GOTO <LIST>
; ON <EXP> GOSUB <LIST>
; ----------------------------------------------------------------------------
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

215
flow2.s Normal file
View File

@ -0,0 +1,215 @@
.segment "CODE"
; ----------------------------------------------------------------------------
; "RUN" COMMAND
; ----------------------------------------------------------------------------
RUN:
bne L27CF
jmp SETPTRS
L27CF:
jsr CLEARC
jmp L27E9
; ----------------------------------------------------------------------------
; "GOSUB" STATEMENT
;
; LEAVES 7 BYTES ON STACK:
; 2 -- RETURN ADDRESS (NEWSTT)
; 2 -- TXTPTR
; 2 -- LINE #
; 1 -- GOSUB TOKEN
; ----------------------------------------------------------------------------
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" STATEMENT
; ALSO USED BY "RUN" AND "GOSUB"
; ----------------------------------------------------------------------------
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 #$00
sta TXTPTR+1
L281E:
rts
; ----------------------------------------------------------------------------
; "POP" AND "RETURN" STATEMENTS
; ----------------------------------------------------------------------------
POP:
bne L281E
lda #$FF
.ifdef CONFIG_2
sta FORPNT+1 ; bugfix, wrong in AppleSoft II
.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" STATEMENT
; EXECUTED BY SKIPPING TO NEXT COLON OR EOL
; ----------------------------------------------------------------------------
DATA:
jsr DATAN
; ----------------------------------------------------------------------------
; ADD (Y) TO TXTPTR
; ----------------------------------------------------------------------------
ADDON:
tya
clc
adc TXTPTR
sta TXTPTR
bcc L2852
inc TXTPTR+1
L2852:
rts
; ----------------------------------------------------------------------------
; SCAN AHEAD TO NEXT ":" OR EOL
; ----------------------------------------------------------------------------
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" STATEMENT
; ----------------------------------------------------------------------------
IF:
jsr FRMEVL
jsr CHRGOT
cmp #TOKEN_GOTO
beq L2884
lda #TOKEN_THEN
jsr SYNCHR
L2884:
lda FAC
bne L288D
; ----------------------------------------------------------------------------
; "REM" STATEMENT, OR FALSE "IF" STATEMENT
; ----------------------------------------------------------------------------
REM:
jsr REMN
beq ADDON
L288D:
jsr CHRGOT
bcs L2895
jmp GOTO
L2895:
jmp EXECUTE_STATEMENT
; ----------------------------------------------------------------------------
; "ON" STATEMENT
;
; ON <EXP> GOTO <LIST>
; ON <EXP> GOSUB <LIST>
; ----------------------------------------------------------------------------
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

11
loadsave.s Normal file
View File

@ -0,0 +1,11 @@
.segment "CODE"
.ifdef APPLE
.include "apple_loadsave.s"
.endif
.ifdef KIM
.include "kim_loadsave.s"
.endif
.ifdef MICROTAN
.include "microtan_loadsave.s"
.endif

View File

@ -15,7 +15,9 @@
.include "message.s" .include "message.s"
.include "memory.s" .include "memory.s"
.include "program.s" .include "program.s"
.include "flow.s" .include "flow1.s"
.include "loadsave.s"
.include "flow2.s"
.include "misc1.s" .include "misc1.s"
.include "print.s" .include "print.s"
.include "input.s" .include "input.s"