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63 lines
1.1 KiB
Plaintext
63 lines
1.1 KiB
Plaintext
;license:MIT
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;(c) 2019 by 4am
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;
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!cpu 6502
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!to "build/FX/DIAGONAL",plain
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*=$6000
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row = $fd
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col = $fe
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counter = $ff
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!source "src/fx/macros.a"
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+SWITCH_TO_MASKS copymasks
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lda #64 ; 40 + 24
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sta counter
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lda #39
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sta col
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@colloop
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lda #23
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sta row
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ldy col
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jsr WaitForVBL
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@rowloop
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tya
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bmi +
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cpy #40
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bcs +
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lda row
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jsr HGRBlockCopyWithMask
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+ iny
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bmi +
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cpy #40
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bcs +
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lda row
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jsr HGRBlockCopy
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+
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dec row
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bpl @rowloop
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lda #64
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jsr WaitForKeyWithTimeout
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bmi @exit
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dec col
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dec counter
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bne @colloop
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@exit rts
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copymasks
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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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!source "src/wait.a"
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!source "src/fx/fx.hgr.common.a"
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!source "src/fx/hw.vbl.a"
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