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40 lines
609 B
ArmAsm
40 lines
609 B
ArmAsm
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.include "atari7800.inc"
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.export _mono_clrscr
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.import _screen
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.import pusha0,pushax
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.include "extzp.inc"
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.code
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.proc _mono_clrscr
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lda #<_screen
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ldx #>_screen
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sta ptr7800
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stx ptr7800+1
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ldx #screenrows
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@L1: ldy #mono_charsperline
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lda #0
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@L2: sta (ptr7800),y
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dey
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bne @L2
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lda ptr7800
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clc
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adc #mono_charsperline
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bcc @L3
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inc ptr7800+1
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@L3: dex
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bne @L1
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rts
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.endproc
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;-------------------------------------------------------------------------------
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; force the init constructor to be imported
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.import mono_initconio
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conio_init = mono_initconio
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