2019-04-02 19:11:11 +00:00
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; Ullrich von Bassewitz, 08.08.1998
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;
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; void cvlinexy (unsigned char x, unsigned char y, unsigned char length);
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; void cvline (unsigned char length);
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;
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.include "atari5200.inc"
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.export _cvlinexy, _cvline
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.import gotoxy, putchar
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.importzp tmp1
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_cvlinexy:
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pha ; Save the length
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jsr gotoxy ; Call this one, will pop params
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pla ; Restore the length and run into _cvline
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_cvline:
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cmp #0 ; Is the length zero?
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beq L9 ; Jump if done
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sta tmp1
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L1: lda COLCRS_5200
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pha
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lda #CH_VLINE ; Vertical bar
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jsr putchar ; Write, no cursor advance
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pla
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sta COLCRS_5200
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inc ROWCRS_5200
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dec tmp1
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bne L1
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L9: rts
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