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45 lines
941 B
ArmAsm
45 lines
941 B
ArmAsm
;
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; jede jede@oric.org 2017-02-25
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;
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.export _clrscr
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.import OLD_CHARCOLOR, OLD_BGCOLOR
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.include "telestrat.inc"
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.proc _clrscr
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; Switch to text mode
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BRK_TELEMON(XTEXT)
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lda #<SCREEN ; Get position screen
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ldy #>SCREEN
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sta RES
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sty RES+1
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ldy #<(SCREEN+SCREEN_XSIZE*SCREEN_YSIZE)
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ldx #>(SCREEN+SCREEN_XSIZE*SCREEN_YSIZE)
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lda #' '
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BRK_TELEMON XFILLM ; Calls XFILLM : it fills A value from RES address and size of X and Y value
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; reset prompt position
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lda #<(SCREEN+40)
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sta ADSCRL
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lda #>(SCREEN+40)
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sta ADSCRH
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; reset display position
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ldx #$01
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stx SCRY
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dex
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stx SCRX
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; At this step X is equal to $00
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dex
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; At this step X is equal to $FF
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stx OLD_BGCOLOR
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stx OLD_CHARCOLOR
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rts
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.endproc
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