mirror of
https://github.com/cc65/cc65.git
synced 2024-12-23 19:29:37 +00:00
31 lines
637 B
ArmAsm
31 lines
637 B
ArmAsm
|
;
|
||
|
|
; Ullrich von Bassewitz, 08.08.1998
|
||
|
|
;
|
||
|
|
; void cclearxy (unsigned char x, unsigned char y, unsigned char length);
|
||
|
|
; void cclear (unsigned char length);
|
||
|
|
;
|
||
|
|
|
||
|
|
.export _cclearxy, _cclear
|
||
|
|
.import popa, _gotoxy, cputdirect
|
||
|
|
.importzp tmp1
|
||
|
|
|
||
|
|
_cclearxy:
|
||
|
|
pha ; Save the length
|
||
|
|
jsr popa ; Get y
|
||
|
|
jsr _gotoxy ; Call this one, will pop params
|
||
|
|
pla ; Restore the length and run into _cclear
|
||
|
|
|
||
|
|
_cclear:
|
||
|
|
cmp #0 ; Is the length zero?
|
||
|
|
beq L9 ; Jump if done
|
||
|
|
sta tmp1
|
||
|
|
L1: lda #$20 ; Blank - screen code
|
||
|
|
jsr cputdirect ; Direct output
|
||
|
|
dec tmp1
|
||
|
|
bne L1
|
||
|
|
L9: rts
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|