mirror of
https://github.com/a2-4am/4cade.git
synced 2024-06-01 08:41:31 +00:00
66 lines
1.2 KiB
Plaintext
66 lines
1.2 KiB
Plaintext
;license:MIT
|
|
;(c) 2019 by 4am
|
|
;
|
|
!cpu 6502
|
|
!to "build/FX/R.BY.PIXEL",plain
|
|
*=$6000
|
|
|
|
tmp = $fc
|
|
maskindex = $fd
|
|
row = $fe
|
|
col = $ff
|
|
|
|
lda #$00
|
|
sta col
|
|
@colloop
|
|
lda #$06
|
|
sta maskindex
|
|
jsr WaitForVBL
|
|
@maskloop
|
|
ldx maskindex
|
|
lda copymasks,x
|
|
sta @copymask
|
|
lda #$17
|
|
sta row
|
|
@rowloop
|
|
lda row
|
|
asl
|
|
asl
|
|
asl
|
|
jsr HGRCalc
|
|
clc
|
|
ldx #$08
|
|
ldy col
|
|
@blockloop
|
|
lda ($26),y
|
|
eor ($3c),y
|
|
@copymask=*+1
|
|
and #$FD ; SMC
|
|
eor ($26),y
|
|
sta ($26),y
|
|
lda $27
|
|
adc #4
|
|
sta $27
|
|
eor #$60
|
|
sta $3d
|
|
dex
|
|
bne @blockloop
|
|
dec row
|
|
bpl @rowloop
|
|
lda #8
|
|
jsr WaitForKeyWithTimeout
|
|
bmi @exit
|
|
dec maskindex
|
|
bpl @maskloop
|
|
inc col
|
|
lda col
|
|
cmp #40
|
|
bne @colloop
|
|
@exit rts
|
|
copymasks
|
|
!byte $FF,$BF,$9F,$8F,$87,$83,$81
|
|
|
|
!source "src/wait.a"
|
|
!source "src/fx/fx.hgr.common.a"
|
|
!source "src/fx/hw.vbl.a"
|