mirror of
https://github.com/a2-4am/4cade.git
synced 2024-11-30 13:50:45 +00:00
199 lines
3.8 KiB
Plaintext
199 lines
3.8 KiB
Plaintext
;license:MIT
|
|
;(c) 2019 by 4am
|
|
;
|
|
!cpu 6502
|
|
!to "build/FX/SOFT.L",plain
|
|
*=$6000
|
|
|
|
y = $fc
|
|
row = $fd
|
|
col = $fe
|
|
counter = $ff
|
|
|
|
!source "src/fx/macros.a"
|
|
!source "src/constants.a"
|
|
|
|
lda #(40+7-1) ; columns + blocks per row - 1
|
|
sta counter
|
|
|
|
lda #39
|
|
sta col
|
|
ColLoop
|
|
lda #23
|
|
sta row
|
|
RowLoop
|
|
; [speedopt] calculate HGR base addresses once per row
|
|
lda row
|
|
asl
|
|
asl
|
|
asl
|
|
+HGR_CALC
|
|
|
|
ldy col
|
|
+IS_Y_OFFSCREEN
|
|
bcs @block2
|
|
|
|
; [speedopt] HGRBlockCopyWithMask but hardcoded for this block's masks
|
|
ldx #7
|
|
clc
|
|
-
|
|
+COPY_BIT $3c, $26, copymasks1
|
|
+HGR_INC_WITHIN_BLOCK
|
|
dex
|
|
bpl -
|
|
|
|
; [speedopt] reset HGR base addresses instead of recalculating them from scratch
|
|
+RESET_HGR_CALC
|
|
@block2
|
|
iny
|
|
+IS_Y_OFFSCREEN
|
|
bcs @block3
|
|
|
|
ldx #7
|
|
clc
|
|
-
|
|
+COPY_BIT $3c, $26, copymasks2
|
|
+HGR_INC_WITHIN_BLOCK
|
|
dex
|
|
bpl -
|
|
|
|
+RESET_HGR_CALC
|
|
@block3
|
|
iny
|
|
+IS_Y_OFFSCREEN
|
|
bcs @block4
|
|
|
|
ldx #7
|
|
clc
|
|
-
|
|
+COPY_BIT $3c, $26, copymasks3
|
|
+HGR_INC_WITHIN_BLOCK
|
|
dex
|
|
bpl -
|
|
|
|
+RESET_HGR_CALC
|
|
@block4
|
|
iny
|
|
+IS_Y_OFFSCREEN
|
|
bcs @block5
|
|
|
|
ldx #7
|
|
clc
|
|
-
|
|
+COPY_BIT $3c, $26, copymasks4
|
|
+HGR_INC_WITHIN_BLOCK
|
|
dex
|
|
bpl -
|
|
|
|
+RESET_HGR_CALC
|
|
@block5
|
|
iny
|
|
+IS_Y_OFFSCREEN
|
|
bcs @block6
|
|
|
|
ldx #7
|
|
clc
|
|
-
|
|
+COPY_BIT $3c, $26, copymasks5
|
|
+HGR_INC_WITHIN_BLOCK
|
|
dex
|
|
bpl -
|
|
|
|
+RESET_HGR_CALC
|
|
@block6
|
|
iny
|
|
+IS_Y_OFFSCREEN
|
|
bcs @block7
|
|
|
|
ldx #7
|
|
clc
|
|
-
|
|
+COPY_BIT $3c, $26, copymasks6
|
|
+HGR_INC_WITHIN_BLOCK
|
|
dex
|
|
bpl -
|
|
|
|
+RESET_HGR_CALC
|
|
@block7
|
|
iny
|
|
+IS_Y_OFFSCREEN
|
|
bcs @nextrow
|
|
|
|
; [speedopt] HGRBlockCopy but inlined
|
|
ldx #7
|
|
clc
|
|
- lda ($3c),y
|
|
sta ($26),y
|
|
+HGR_INC_WITHIN_BLOCK
|
|
dex
|
|
bpl -
|
|
|
|
; don't need RESET_HGR_CALC here because we're done with this row
|
|
@nextrow
|
|
dec row
|
|
+LBPL RowLoop
|
|
lda $c000
|
|
bmi @exit
|
|
dec col
|
|
dec counter
|
|
+LBNE ColLoop
|
|
@exit rts
|
|
|
|
copymasks1
|
|
!byte %10000000
|
|
!byte %10000000
|
|
!byte %10000000
|
|
!byte %10001000
|
|
!byte %10001000
|
|
!byte %10000000
|
|
!byte %10000000
|
|
!byte %10000000
|
|
copymasks2
|
|
!byte %10000000
|
|
!byte %10000000
|
|
!byte %10010100
|
|
!byte %10001000
|
|
!byte %10001000
|
|
!byte %10010100
|
|
!byte %10000000
|
|
!byte %10000000
|
|
copymasks3
|
|
!byte %10000000
|
|
!byte %10000000
|
|
!byte %10011100
|
|
!byte %10011100
|
|
!byte %10011100
|
|
!byte %10011100
|
|
!byte %10000000
|
|
!byte %10000000
|
|
copymasks4
|
|
!byte %10000000
|
|
!byte %10101010
|
|
!byte %10011100
|
|
!byte %10111110
|
|
!byte %10011100
|
|
!byte %10011100
|
|
!byte %10101010
|
|
!byte %10000000
|
|
copymasks5
|
|
!byte %10000000
|
|
!byte %10111110
|
|
!byte %10111110
|
|
!byte %10111110
|
|
!byte %10111110
|
|
!byte %10111110
|
|
!byte %10111110
|
|
!byte %10000000
|
|
copymasks6
|
|
!byte %11010101
|
|
!byte %10111110
|
|
!byte %11111111
|
|
!byte %10111110
|
|
!byte %11111111
|
|
!byte %10111110
|
|
!byte %10111110
|
|
!byte %11010101
|
|
|
|
!source "src/wait.a"
|
|
!source "src/fx/fx.hgr.common.a"
|