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cc65/libsrc/atari7800/clrscr.s
2022-04-02 09:39:55 +03:00

32 lines
527 B
ArmAsm

.include "atari7800.inc"
.export _clrscr
.import CURS_X
.import CURS_Y
.import _screen
.import pushax, __bzero
.code
.proc _clrscr
lda #0
sta CURS_X
sta CURS_Y
lda #<(_screen)
ldx #>(_screen)
jsr pushax
ldx #>(charsperline * screenrows)
lda #<(charsperline * screenrows)
jmp __bzero
.endproc
;-------------------------------------------------------------------------------
; force the init constructor to be imported
.import initconio
conio_init = initconio