mirror of
https://github.com/cc65/cc65.git
synced 2024-11-03 10:07:02 +00:00
72 lines
1.4 KiB
ArmAsm
72 lines
1.4 KiB
ArmAsm
|
;
|
||
|
|
; 2017-12-27, groepaz
|
||
|
|
;
|
||
|
|
; void cpeeks (char* s, unsigned length);
|
||
|
|
;
|
||
|
|
.export soft80_cpeeks
|
||
|
|
.import soft80_cpeekc, soft80_kplot, popax
|
||
|
|
|
||
|
|
.importzp ptr1, ptr2
|
||
|
|
|
||
|
|
.include "c64.inc"
|
||
|
|
.include "soft80.inc"
|
||
|
|
|
||
|
|
soft80_cpeeks:
|
||
|
|
eor #<$FFFF ; counting a word upward is faster
|
||
|
|
sta ptr2 ; so, we use -(length + 1)
|
||
|
|
txa
|
||
|
|
eor #>$FFFF
|
||
|
|
sta ptr2+1
|
||
|
|
|
||
|
|
jsr popax
|
||
|
|
sta ptr1
|
||
|
|
stx ptr1+1
|
||
|
|
|
||
|
|
; save current cursor position
|
||
|
|
lda CURS_X
|
||
|
|
pha
|
||
|
|
lda CURS_Y
|
||
|
|
pha
|
||
|
|
|
||
|
|
; get the string
|
||
|
|
@lp:
|
||
|
|
jsr soft80_cpeekc
|
||
|
|
ldy #0
|
||
|
|
sta (ptr1),y
|
||
|
|
|
||
|
|
; advance cursor position
|
||
|
|
ldy CURS_X
|
||
|
|
ldx CURS_Y
|
||
|
|
iny
|
||
|
|
cpy #charsperline
|
||
|
|
bne @sk2
|
||
|
|
ldy #0
|
||
|
|
inx
|
||
|
|
@sk2:
|
||
|
|
sty CURS_X
|
||
|
|
stx CURS_Y
|
||
|
|
clc
|
||
|
|
jsr soft80_kplot
|
||
|
|
|
||
|
|
inc ptr1
|
||
|
|
bne @sk
|
||
|
|
inc ptr1+1
|
||
|
|
@sk:
|
||
|
|
inc ptr2
|
||
|
|
bne @lp
|
||
|
|
inc ptr2+1
|
||
|
|
bne @lp
|
||
|
|
|
||
|
|
; terminate the string
|
||
|
|
lda #0
|
||
|
|
ldy #0
|
||
|
|
sta (ptr1),y
|
||
|
|
|
||
|
|
; restore the cursor position
|
||
|
|
pla
|
||
|
|
tax ; CURS_Y
|
||
|
|
pla
|
||
|
|
tay ; CURS_X
|
||
|
|
clc
|
||
|
|
jmp soft80_kplot
|