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all code broken up

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This commit is contained in:
Michael Steil
2008-10-13 02:14:07 +00:00
parent 76875ac392
commit babaa8be94
9 changed files with 1916 additions and 2028 deletions
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memory.s
+130 -222
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@@ -1,242 +1,150 @@
.segment "CODE"
; ----------------------------------------------------------------------------
; "DIM" STATEMENT
; ----------------------------------------------------------------------------
NXDIM:
jsr CHKCOM
DIM:
tax
jsr PTRGET2
jsr CHRGOT
bne NXDIM
rts
; ----------------------------------------------------------------------------
; PTRGET -- GENERAL VARIABLE SCAN
; CALLED BY "NEXT" AND "FOR" TO SCAN THROUGH
; THE STACK FOR A FRAME WITH THE SAME VARIABLE.
;
; SCANS VARIABLE NAME AT TXTPTR, AND SEARCHES THE
; VARTAB AND ARYTAB FOR THE NAME.
; IF NOT FOUND, CREATE VARIABLE OF APPROPRIATE TYPE.
; RETURN WITH ADDRESS IN VARPNT AND Y,A
; (FORPNT) = ADDRESS OF VARIABLE IF "FOR" OR "NEXT"
; = $XXFF IF CALLED FROM "RETURN"
; <<< BUG: SHOULD BE $FFXX >>>
;
; ACTUAL ACTIVITY CONTROLLED SOMEWHAT BY TWO FLAGS:
; DIMFLG -- NONZERO IF CALLED FROM "DIM"
; ELSE = 0
; RETURNS .NE. IF VARIABLE NOT FOUND,
; (X) = STACK PNTR AFTER SKIPPING ALL FRAMES
;
; SUBFLG -- = $00
; = $40 IF CALLED FROM "GETARYPT"
; .EQ. IF FOUND
; (X) = STACK PNTR OF FRAME FOUND
; ----------------------------------------------------------------------------
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
; ----------------------------------------------------------------------------
; CHECK IF (A) IS ASCII LETTER A-Z
;
; RETURN CARRY = 1 IF A-Z
; = 0 IF NOT
; ----------------------------------------------------------------------------
ISLETC:
cmp #$41
bcc L2F3C
sbc #$5B
sec
sbc #$A5
L2F3C:
rts
; ----------------------------------------------------------------------------
; VARIABLE NOT FOUND, SO MAKE ONE
; ----------------------------------------------------------------------------
NAMENOTFOUND:
pla
pha
cmp #<FRM_VARIABLE_CALL
bne MAKENEWVARIABLE
.ifdef CONFIG_SAFE_NAMENOTFOUND
GTFORPNT:
tsx
inx
inx
inx
inx
L2279:
lda STACK+1,x
cmp #$81
bne L22A1
lda FORPNT+1
bne L228E
lda STACK+2,x
cmp #>FRM_VARIABLE_CALL
bne MAKENEWVARIABLE
.endif
LD015:
lda #<C_ZERO
ldy #>C_ZERO
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
; ----------------------------------------------------------------------------
.ifndef CBM2_KBD
C_ZERO:
.byte $00,$00
.endif
; ----------------------------------------------------------------------------
; MAKE A NEW SIMPLE VARIABLE
; MOVE BLOCK OF MEMORY UP
;
; MOVE ARRAYS UP 7 BYTES TO MAKE ROOM FOR NEW VARIABLE
; ENTER 7-BYTE VARIABLE DATA IN THE HOLE
; ON ENTRY:
; (Y,A) = (HIGHDS) = DESTINATION END+1
; (LOWTR) = LOWEST ADDRESS OF SOURCE
; (HIGHTR) = HIGHEST SOURCE ADDRESS+1
; ----------------------------------------------------------------------------
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
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
sty HIGHTR+1
clc
adc #BYTES_PER_VARIABLE
bcc L2F68
iny
L2F68:
sta HIGHDS
sty HIGHDS+1
jsr BLTU
bcs L22C6
dec HIGHTR+1
sec
L22C6:
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
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
; ----------------------------------------------------------------------------
; PUT ADDRESS OF VALUE OF VARIABLE IN VARPNT AND Y,A
; CHECK IF ENOUGH ROOM LEFT ON STACK
; FOR "FOR", "GOSUB", OR EXPRESSION EVALUATION
; ----------------------------------------------------------------------------
SET_VARPNT_AND_YA:
lda LOWTR
clc
adc #$02
ldy LOWTR+1
bcc L2F9E
iny
L2F9E:
sta VARPNT
sty VARPNT+1
CHKMEM:
asl a
adc #SPACE_FOR_GOSUB
bcs MEMERR
sta INDEX
tsx
cpx INDEX
bcc MEMERR
rts
; ----------------------------------------------------------------------------
; CHECK IF ENOUGH ROOM BETWEEN ARRAYS AND STRINGS
; (Y,A) = ADDR ARRAYS NEED TO GROW TO
; ----------------------------------------------------------------------------
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