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36 lines
963 B
ArmAsm
36 lines
963 B
ArmAsm
;
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; 2019-07-07, Jede (jede@oric.org)
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;
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; void cclearxy (unsigned char x, unsigned char y, unsigned char length);
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; void cclear (unsigned char length);
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;
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.export _cclearxy, _cclear
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.import update_adscr, display_conio
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.importzp tmp1
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.import popax
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.include "telestrat.inc"
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_cclearxy:
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pha ; Save the length
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jsr popax ; Get X and Y
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sta SCRY ; Store Y
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stx SCRX ; Store X
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jsr update_adscr
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pla ; Restore the length and run into _cclear
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_cclear:
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tax ; Is the length equal to zero?
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beq @L2 ; Yes we skip
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@L1:
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stx tmp1 ; Save X
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lda #' ' ; Erase current char
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jsr display_conio
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ldx tmp1
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dex
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bne @L1
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@L2:
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rts
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