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47 lines
839 B
ArmAsm
47 lines
839 B
ArmAsm
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;
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; Maciej 'YTM/Elysium' Witkowiak
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;
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; 27.10.2001, 23.12.2002
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; void clrscr (void);
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.export _clrscr
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.include "../inc/jumptab.inc"
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.include "../inc/geossym.inc"
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.include "../inc/const.inc"
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.import fixcursor
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.importzp cursor_c, cursor_r
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_clrscr:
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lda #ST_WR_FORE | ST_WR_BACK
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sta dispBufferOn
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lda curPattern ; save current pattern
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pha
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lda #0 ; set pattern to clear
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jsr SetPattern
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ldx #0
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stx r3L
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stx r3H
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stx r2L
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stx cursor_c
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inx
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stx cursor_r
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jsr fixcursor ; home cursor
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lda #199
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sta r2H
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lda graphMode
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bpl L40
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lda #>639 ; 80 columns
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ldx #<639
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bne L99
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L40: lda #>319 ; 40 columns
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ldx #<319
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L99: sta r4H
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stx r4L
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jsr Rectangle
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pla
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jmp SetPattern ; restore pattern
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