mirror of
https://github.com/a2-4am/4cade.git
synced 2024-11-28 00:52:00 +00:00
76 lines
1.5 KiB
Plaintext
76 lines
1.5 KiB
Plaintext
;license:MIT
|
|
;(c) 2018 by 4am
|
|
;
|
|
!cpu 6502
|
|
!to "build/FX/ONESQUARE",plain
|
|
*=$6000
|
|
|
|
lda #<@coords
|
|
sta $FE
|
|
lda #>@coords
|
|
sta $FF
|
|
ldy #$00
|
|
@loop1
|
|
lda ($FE),y
|
|
bpl @copy
|
|
lda #$18
|
|
jsr WaitForKeyWithTimeout
|
|
bmi @exit
|
|
bpl @next ; always branches
|
|
@copy
|
|
tax
|
|
iny
|
|
lda ($fe),y
|
|
tay
|
|
txa
|
|
jsr HGRBlockToWhite
|
|
@next
|
|
inc $FE
|
|
bne +
|
|
inc $FF
|
|
+ inc $FE
|
|
bne +
|
|
inc $FF
|
|
+ ldy #$00
|
|
lda ($FE),y
|
|
cmp #$80
|
|
bne @loop1
|
|
|
|
@loop2
|
|
dec $FE
|
|
lda $FE
|
|
cmp #$FF
|
|
bne +
|
|
dec $FF
|
|
+ dec $FE
|
|
lda $FE
|
|
cmp #$FF
|
|
bne +
|
|
dec $FF
|
|
+ ldy #$00
|
|
lda ($FE),y
|
|
cmp #$80
|
|
beq @exit
|
|
lda ($FE),y
|
|
bpl @copy2
|
|
lda #$18
|
|
jsr WaitForKeyWithTimeout
|
|
bmi @exit
|
|
bpl @loop2 ; always branches
|
|
@copy2
|
|
tax
|
|
iny
|
|
lda ($fe),y
|
|
tay
|
|
txa
|
|
jsr HGRBlockCopy
|
|
beq @loop2 ; always branches
|
|
@exit rts
|
|
|
|
!byte $80,$80
|
|
@coords
|
|
!source "src/fx/fx.hgr.onesquare.data.a"
|
|
!byte $80
|
|
!source "src/wait.a"
|
|
!source "src/fx/fx.hgr.common.a"
|