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paolo.iocco
2023-03-13 08:36:51 +00:00
parent 5347889cd2
commit f29dcc4188
5439 changed files with 1065799 additions and 0 deletions
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174
trunk/workspace/AVR-Computer/msbasic/misc2.s Normal file
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.segment "CODE"
; ----------------------------------------------------------------------------
; "FRE" FUNCTION
;
; COLLECTS GARBAGE AND RETURNS # BYTES OF MEMORY LEFT
; ----------------------------------------------------------------------------
FRE:
lda VALTYP
beq L3188
jsr FREFAC
L3188:
jsr GARBAG
sec
lda FRETOP
sbc STREND
tay
lda FRETOP+1
sbc STREND+1
; FALL INTO GIVAYF TO FLOAT THE VALUE
; NOTE THAT VALUES OVER 32767 WILL RETURN AS NEGATIVE
; ----------------------------------------------------------------------------
; FLOAT THE SIGNED INTEGER IN A,Y
; ----------------------------------------------------------------------------
GIVAYF:
ldx #$00
stx VALTYP
sta FAC+1
sty FAC+2
ldx #$90
jmp FLOAT1
POS:
ldy POSX
; ----------------------------------------------------------------------------
; FLOAT (Y) INTO FAC, GIVING VALUE 0-255
; ----------------------------------------------------------------------------
SNGFLT:
lda #$00
beq GIVAYF
; ----------------------------------------------------------------------------
; CHECK FOR DIRECT OR RUNNING MODE
; GIVING ERROR IF DIRECT MODE
; ----------------------------------------------------------------------------
ERRDIR:
ldx CURLIN+1
inx
bne RTS9
ldx #ERR_ILLDIR
.ifdef CONFIG_2
.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 CONFIG_2
ldx #ERR_UNDEFFN
.endif
lda (FNCNAM),y
.ifndef CONFIG_2
beq L31AF
.endif
sta VARPNT
tax
iny
lda (FNCNAM),y
.ifdef CONFIG_2
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