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cc65/libsrc/creativision/cclear.s
2017-02-01 20:09:03 +01:00

27 lines
551 B
ArmAsm

;*
;* 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 length
jsr popa ; get Y
jsr _gotoxy
pla
_cclear:
cmp #0 ; Zero length?
beq L2
sta tmp1
L1: lda #$20 ; Space
jsr cputdirect
dec tmp1
bne L1
L2: rts