mirror of https://github.com/a2-4am/4cade.git
46 lines
894 B
Plaintext
46 lines
894 B
Plaintext
;license:MIT
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;(c) 2019-2022 by 4am
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;
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!cpu 6502
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!to "build/FX.INDEXED/STAGGER.UD",plain
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*=$6000
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row1 = $fe
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row2 = $ff
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!source "src/fx/macros.a"
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lda #$00
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sta row1
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lda #$2E
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sta row2
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ldy #$27
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@loop1 lda row1
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jsr HGRHalfBlockCopy
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dey
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jsr HGRStaggerCopy
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dey
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bpl @loop1
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iny ; Y -> 0
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@loop2 lda row2
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jsr HGRHalfBlockCopy
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iny
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jsr HGRStaggerCopy
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iny
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cpy #$28
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bne @loop2
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lda #$40
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jsr WaitForKeyWithTimeout
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bmi @exit
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dey ; Y -> #$27
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inc row1
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inc row1
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dec row2
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dec row2
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bpl @loop1
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@exit rts
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!source "src/wait.a"
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+HGR_HALF_BLOCK_COPY_ROUTINES
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