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115 lines
2.3 KiB
Plaintext
115 lines
2.3 KiB
Plaintext
;license:MIT
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;(c) 2018 by 4am
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;
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!cpu 6502
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!to "build/FX/TRI.FIZZLE",plain
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*=$6000
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phase = $FC ; byte, $80 or $00
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maskindex = $FD ; byte
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coord = $FE ; word
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lda #$80
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sta phase
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lda #0
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sta maskindex
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@outerloop
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lda #<Coordinates
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sta coord
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lda #>Coordinates
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sta coord+1
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@loop
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dec maskindex
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bpl +
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lda #3
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sta maskindex
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+ ldx maskindex
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lda maskslo,x
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ldy maskshi,x
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jsr SetCopyMask
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ldy #0
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lda (coord),y
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bmi @nextPhase
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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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bit phase
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bmi +
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jsr HGRBlockCopy
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jmp @wait
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+ jsr HGRBlockCopyWithMask
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@wait
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lda #$0C
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jsr WaitForKeyWithTimeout
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bmi @exit
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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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+ bne @loop
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@nextPhase
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bit phase
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bpl @exit
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asl phase
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bcs @outerloop ; always branches
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@exit rts
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maskslo
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!byte <mask1
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!byte <mask2
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!byte <mask3
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!byte <mask4
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maskshi
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!byte >mask1
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!byte >mask2
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!byte >mask3
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!byte >mask4
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mask1
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!byte %11111111
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!byte %11111110
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!byte %11111100
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!byte %11111000
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!byte %11110000
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!byte %11100000
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!byte %11000000
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!byte %10000000
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mask2
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!byte %11111111
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!byte %10111111
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!byte %10011111
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!byte %10001111
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!byte %10000111
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!byte %10000011
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!byte %10000001
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!byte %10000000
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mask3
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!byte %10000000
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!byte %10000001
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!byte %10000011
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!byte %10000111
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!byte %10001111
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!byte %10011111
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!byte %10111111
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!byte %11111111
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mask4
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!byte %10000000
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!byte %11000000
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!byte %11100000
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!byte %11110000
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!byte %11111000
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!byte %11111100
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!byte %11111110
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!byte %11111111
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Coordinates
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!source "src/fx/fx.hgr.block.fizzle.data.a"
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!source "src/wait.a"
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!source "src/fx/fx.hgr.common.a"
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