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34 lines
650 B
Plaintext
34 lines
650 B
Plaintext
coord = $FE
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lda #<@coords
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sta coord
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lda #>@coords
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sta coord+1
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ldy #0
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@loop
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lda (coord),y
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bpl @copy
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lda #$28
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jsr WaitForKeyWithTimeout
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bmi @exit
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bpl @next ; always branches
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@copy
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tax
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iny
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lda (coord),y
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tay
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txa
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jsr HGRHalfBlockCopy
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@next
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inc coord
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bne +
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inc coord+1
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+ inc coord
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bne +
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inc coord+1
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+ ldy #$00
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lda ($FE),y
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cmp #$80
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bne @loop
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@exit rts
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