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35 lines
699 B
ArmAsm
35 lines
699 B
ArmAsm
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; Ullrich von Bassewitz, 08.08.1998
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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 popa, _gotoxy, cputdirect
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.importzp tmp1
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_cclearxy:
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pha ; Save the length
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jsr popa ; Get y
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jsr _gotoxy ; Call this one, will pop params
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pla ; Restore the length and run into _cclear
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_cclear:
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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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.ifdef DIRECT_SCREEN
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L1: lda #0 ; Blank - screen code
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.else
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L1: lda #$20 ; Blank
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.endif
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jsr cputdirect ; Direct output
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dec tmp1
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bne L1
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L9: rts
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