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942e57e826bfaf83a76f656adb0f8b8e30f1ec56
AmigaExamples/028.game2/game1.s
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alpine9000 942e57e826 Fast screen setup
2016-04-18 19:31:24 +10:00

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include "includes.i"
xdef copperList
xdef copperListBpl1Ptr
xdef copperListBpl2Ptr
xdef backgroundOnscreen
xdef backgroundOffscreen
xdef foregroundOnscreen
xdef foregroundOffscreen
xdef foregroundScrollX
xdef backgroundScrollX
xdef map
xdef itemsMap
xdef mapSize
xdef moving
xdef foregroundScrollPixels
byteMap:
dc.l Entry
dc.l endCode-byteMap
Entry:
lea userstack,a7
lea CUSTOM,a6
move #$7ff,DMACON(a6) ; disable all dma
move #$7fff,INTENA(a6) ; disable all interrupts
lea Level3InterruptHandler,a3
move.l a3,LVL3_INT_VECTOR
;; d0 - fg bitplane pointer offset
;; d1 - bg bitplane pointer offset
move.l #0,d0
move.l #1,d1
jsr SwitchBuffers
move.w #(INTF_SETCLR|INTF_VERTB|INTF_INTEN),INTENA(a6)
move.w #(DMAF_BLITTER|DMAF_SETCLR!DMAF_MASTER),DMACON(a6)
lea panelCopperListBpl1Ptr,a0
lea panel,a1
jsr PokePanelBitplanePointers
jsr Init ; enable the playfield
jsr InstallSpriteColorPalette
jsr InstallGreyPalette
Reset:
move.l #0,foregroundScrollX
move.l #0,backgroundScrollX
jsr BlueFill
move.l #-1,frameCount
MainLoop:
MOVE.W #$0024,BPLCON2(a6)
SetupBoardLoop:
add.l #1,frameCount
move.l frameCount,d6
move.l #(FOREGROUND_SCROLL_PIXELS*16)-1,foregroundScrollPixels
;; move.l #FOREGROUND_SCROLL_PIXELS,foregroundScrollPixels
;; jsr WaitVerticalBlank
bsr HoriScrollPlayfield
jsr SwitchBuffers ; takes bitplane pointer offset in d0
move.l foregroundScrollX,d0
move.w #1,moving
bsr Update
bsr RenderNextForegroundFrame
;; bsr RenderNextBackgroundFrame
;; cmp.l #FOREGROUND_PLAYAREA_WIDTH_WORDS*15,frameCount
cmp.l #FOREGROUND_PLAYAREA_WIDTH_WORDS,frameCount
bge .gotoGameLoop
bra SetupBoardLoop
.gotoGameLoop:
jsr WaitVerticalBlank
bra GameLoop
GameLoop:
add.l #1,frameCount
move.l frameCount,d6
;; cmp.l #FOREGROUND_PLAYAREA_WIDTH_WORDS*15+25,d6
cmp.l #FOREGROUND_PLAYAREA_WIDTH_WORDS+25,d6
bne .c1
move.w #(DMAF_SPRITE|DMAF_BLITTER|DMAF_SETCLR!DMAF_COPPER!DMAF_RASTER!DMAF_MASTER),DMACON(a6)
jsr InitialisePig
.c1:
bsr InstallNextGreyPalette
move.l #FOREGROUND_SCROLL_PIXELS,foregroundScrollPixels
jsr WaitVerticalBlank
bsr HoriScrollPlayfield
jsr SwitchBuffers ; takes bitplane pointer offset in d0
move.l foregroundScrollX,d0
lsr.l #FOREGROUND_SCROLL_SHIFT_CONVERT,d0 ; convert to pixels
and.b #$f,d0
cmp.b #$f,d0
bne .s2
move.w #0,moving
.s2:
jsr ProcessJoystick
bsr Update
bsr RenderNextForegroundFrame
bsr RenderNextBackgroundFrame
if 0
move.w #$f00,COLOR00(a6)
endif
bra GameLoop
Update:
;; right
jsr UpdatePig
.backgroundUpdates:
add.l #BACKGROUND_SCROLL_PIXELS,backgroundScrollX
btst #FOREGROUND_DELAY_BIT,d6
beq .skipForegroundUpdates
;; ---- Foreground updates ----------------------------------------
.foregroundUpdates:
move.l foregroundScrollX,d0
lsr.l #FOREGROUND_SCROLL_SHIFT_CONVERT,d0 ; convert to pixels
andi.l #$f,d0
cmp.w #0,moving
beq .c1
move.l foregroundScrollPixels,d0
add.l d0,foregroundScrollX
jsr ScrollSprites
move.l foregroundScrollX,d0
lsr.l #FOREGROUND_SCROLL_SHIFT_CONVERT,d0 ; convert to pixels
andi.l #$f,d0
cmp.b #0,d0
bne .c1
bsr ResetAnimPattern
bsr ResetDeAnimPattern
.c1:
.skipForegroundUpdates:
rts
HoriScrollPlayfield:
;; d0 - fg x position in pixels
;; d1 - bg x position in pixels
;; movem.l d0-d6,-(sp)
move.l backgroundScrollX,d0
lsr.l #BACKGROUND_SCROLL_SHIFT_CONVERT,d0 ; convert to pixels
move.w d0,d2
lsr.w #3,d0 ; bytes to scroll
and.w #$F,d2 ; pixels = 0xf - (hpos - (hpos_bytes*8))
move.w #$F,d0
sub.w d2,d0 ; bits to delay
move.w d0,d5 ; d5 == bg bits to delay
move.l foregroundScrollX,d0
lsr.l #FOREGROUND_SCROLL_SHIFT_CONVERT,d0 ; convert to pixels
move.w d0,d2
lsr.w #3,d0 ; bytes to scroll
and.w #$F,d2 ; pixels = 0xf - (hpos - (hpos_bytes*8))
move.w #$F,d0
sub.w d2,d0 ; bits to delay
lsl.w #4,d5
or.w d5,d0
move.w d0,copperListScrollPtr
;; move.w d0,BPLCON1(a6)
;; movem.l (sp)+,d0-d6
rts
ResetAnimPattern:
lea animIndex,a0
move.l animIndexPatternPtr,a1
move.l #7,d0
.loop:
move.l (a1)+,(a0)+
dbra d0,.loop
add.l #8,animIndexPatternPtr
cmp.l #$ffffffff,(a1)
bne .s1
lea animIndexPattern,a0
move.l a0,animIndexPatternPtr
.s1:
rts
ResetDeAnimPattern:
lea deAnimIndex,a0
move.l deAnimIndexPatternPtr,a1
move.l #7,d0
.loop:
move.l (a1)+,(a0)+
dbra d0,.loop
add.l #8,deAnimIndexPatternPtr
cmp.l #$ffffffff,(a1)
bne .s1
lea deAnimIndexPattern,a0
move.l a0,deAnimIndexPatternPtr
.s1:
rts
RenderNextBackgroundFrame:
lea backgroundMap,a2
move.l backgroundScrollX,d0
lsr.l #BACKGROUND_SCROLL_TILE_INDEX_CONVERT,d0
and.b #$fe,d0
add.l d0,a2
cmp.w #$FFFF,20(a2)
bne .skip
move.l #0,backgroundScrollX
.skip:
bsr RenderBackgroundTile
rts
RenderNextForegroundFrame:
lea map,a2
move.l foregroundScrollX,d0
lsr.l #FOREGROUND_SCROLL_TILE_INDEX_CONVERT,d0
lsr.l #1,d0
and.b #$f0,d0
add.l d0,a2
move.l #FOREGROUND_PLAYAREA_HEIGHT_WORDS-1,d3 ; 8 tiles per column
.loop:
move.l d3,d2
bsr RenderForegroundTile
bsr ClearForegroundTile
jsr RenderItemSprite
add.l #2,a2
dbra d3,.loop
rts
RenderForegroundTile_NoAnim:
;; a2 - address of tileIndex
move.l foregroundScrollX,d0
lsr.w #FOREGROUND_SCROLL_SHIFT_CONVERT,d0 ; convert to pixels
lsr.w #3,d0 ; bytes to scroll
move.l foregroundOffscreen,a0
add.l d0,a0
lea tilemap,a1
add.w (a2),a1 ; source tile
add.l #(BITPLANE_WIDTH_BYTES*SCREEN_BIT_DEPTH*(256-(16*8)+32)/4)+BITPLANE_WIDTH_BYTES-FOREGROUND_PLAYAREA_RIGHT_MARGIN_BYTES,a0
jsr BlitTile
rts
RenderForegroundTile:
;; a2 - address of tileIndex
move.l foregroundScrollX,d0
lsr.w #FOREGROUND_SCROLL_SHIFT_CONVERT,d0 ; convert to pixels
lsr.w #3,d0 ; bytes to scroll
move.l foregroundOffscreen,a0
add.l d0,a0
lea tilemap,a1
add.w (a2),a1 ; source tile
add.l #(BITPLANE_WIDTH_BYTES*SCREEN_BIT_DEPTH*(256-(16*8)+32)/4)+BITPLANE_WIDTH_BYTES-FOREGROUND_PLAYAREA_RIGHT_MARGIN_BYTES,a0
lea animIndex,a4
move.l d2,d1
lsl.l #2,d1
add.l d1,a4
move.l (a4),d1
lsr.l #2,d1 ; anim scaling (speed)
cmp.l #10,d1
bge .s1
add.l d1,a1
jsr BlitTile
cmp.l #2,(a4)
blt .s2
.s1:
sub.l #2,(a4)
.s2:
rts
ClearForegroundTile:
lea tilemap,a1
move.l a2,a4
sub.l #FOREGROUND_PLAYAREA_WIDTH_WORDS*8,a4
sub.l d0,d0
move.w (a4),d0
add.l d0,a1
;; add.w (a2,-FOREGROUND_PLAYAREA_WIDTH_WORDS),a1 ; source tile
lea map,a3
add.l #FOREGROUND_PLAYAREA_WIDTH_WORDS*FOREGROUND_PLAYAREA_HEIGHT_WORDS,a3
cmp.l a3,a2 ; don't clear until the full play area has scrolled in
blt .s3
sub.l #FOREGROUND_PLAYAREA_WIDTH_WORDS,a0
lea deAnimIndex,a4
move.l d2,d1
lsl.l #2,d1
add.l d1,a4
move.l (a4),d1
lsr.l #2,d1 ; anim scaling (speed)
cmp.l #10,d1
bge .s1
add.l d1,a1
add.l #2,(a4)
bra .s2
.s1:
add.w #11520,a1 ; source tile
.s2:
jsr BlitTile
.s3:
rts
RenderBackgroundTile:
;; a2 - map
move.l backgroundScrollX,d0
lsr.w #BACKGROUND_SCROLL_SHIFT_CONVERT,d0 ; convert to pixels
lsr.w #3,d0 ; bytes to scroll
move.l backgroundOffscreen,a0
add.l d0,a0
lea backgroundTilemap,a1
add.l #BITPLANE_WIDTH_BYTES-2,a0 ; dest
add.w (a2),a1 ; source tile
move.l backgroundScrollX,d2
lsr.b #BACKGROUND_SCROLL_SHIFT_CONVERT,d2 ; convert to pixels
andi.w #$f,d2 ; find the shift component
jsr BlitTile
rts
Level3InterruptHandler:
movem.l d0-a6,-(sp)
lea CUSTOM,a6
.checkVerticalBlank:
move.w INTREQR(a6),d0
and.w #INTF_VERTB,d0
beq .checkCopper
.verticalBlank:
move.w #INTF_VERTB,INTREQ(a6) ; clear interrupt bit
add.l #1,verticalBlankCount
jsr SetupSpriteData
.checkCopper:
move.w INTREQR(a6),d0
and.w #INTF_COPER,d0
beq.s .interruptComplete
.copperInterrupt:
move.w #INTF_COPER,INTREQ(a6) ; clear interrupt bit
.interruptComplete:
movem.l (sp)+,d0-a6
rte
copperList:
panelCopperListBpl1Ptr:
dc.w BPL1PTL,0
dc.w BPL1PTH,0
dc.w BPL2PTL,0
dc.w BPL2PTH,0
dc.w BPL3PTL,0
dc.w BPL3PTH,0
dc.w BPL4PTL,0
dc.w BPL4PTH,0
dc.w BPLCON1,0
dc.w DDFSTRT,(RASTER_X_START/2-SCREEN_RES)
dc.w DDFSTOP,(RASTER_X_START/2-SCREEN_RES)+(8*((SCREEN_WIDTH/16)-1))
dc.w BPLCON0,(4<<12)|COLOR_ON ; 4 bit planes
dc.w BPL1MOD,SCREEN_WIDTH_BYTES*4-SCREEN_WIDTH_BYTES
dc.w BPL2MOD,SCREEN_WIDTH_BYTES*4-SCREEN_WIDTH_BYTES
include "out/panel-copper-list.s"
dc.W $5bd1,$fffe
dc.w BPL1MOD,BITPLANE_WIDTH_BYTES*SCREEN_BIT_DEPTH-SCREEN_WIDTH_BYTES-2
dc.w BPL2MOD,BITPLANE_WIDTH_BYTES*SCREEN_BIT_DEPTH-SCREEN_WIDTH_BYTES-2
dc.w BPLCON1
copperListScrollPtr:
dc.w 0
copperListBpl1Ptr:
;; this is where bitplanes are assigned to playfields
;; http://amigadev.elowar.com/read/ADCD_2.1/Hardware_Manual_guide/node0079.html
;; 3 bitplanes per playfield, playfield1 gets bitplanes 1,3,5
dc.w BPL1PTL,0
dc.w BPL1PTH,0
dc.w BPL3PTL,0
dc.w BPL3PTH,0
dc.w BPL5PTL,0
dc.w BPL5PTH,0
copperListBpl2Ptr:
;; 3 bitplanes per playfield, playfield2 gets bitplanes 2,4,6
dc.w BPL2PTL,0
dc.w BPL2PTH,0
dc.w BPL4PTL,0
dc.w BPL4PTH,0
dc.w BPL6PTL,0
dc.w BPL6PTH,0
dc.w DDFSTRT,(RASTER_X_START/2-SCREEN_RES)-8 ; -8 for extra scrolling word
dc.w DDFSTOP,(RASTER_X_START/2-SCREEN_RES)+(8*((SCREEN_WIDTH/16)-1))
dc.w BPLCON0,(SCREEN_BIT_DEPTH*2<<12)|COLOR_ON|DBLPF
tileMapCopperPalettePtr:
include "tilemap-copper-list.s"
dc.l $fffffffe
InstallSpriteColorPalette:
include "out/sprite_pig_up-palette.s"
include "out/sprite_coin1-palette.s"
rts
InstallColorPalette:
lea tileMapCopperPalettePtr,a1
lea tilemapPalette,a0
add.l #2,a1
move.l #15,d0
.loop:
move.w (a0),(a1)
add.l #2,a0
add.l #4,a1
dbra d0,.loop
rts
InstallGreyPalette:
lea tileMapCopperPalettePtr,a1
lea greyPalette,a0
add.l #2,a1
move.l #15,d0
.loop:
move.w (a0),(a1)
add.l #2,a0
add.l #4,a1
dbra d0,.loop
rts
InstallNextGreyPalette:
lea tileMapCopperPalettePtr,a1
move.l fadePtr,a0
lea fadeComplete,a2
cmp.l a2,a0
bge .done
add.l #2,a1
move.l #15,d0
.loop:
move.w (a0),(a1)
add.l #2,a0
add.l #4,a1
dbra d0,.loop
move.l frameCount,d0
lsr.l #1,d0
btst.l #0,d0
beq .done
add.l #16*2,fadePtr
.done
rts
InstallPalette:
include "out/tilemap-palette.s"
rts
foregroundOnscreen:
dc.l foregroundBitplanes1
foregroundOffscreen:
dc.l foregroundBitplanes2
backgroundOnscreen:
dc.l backgroundBitplanes1
backgroundOffscreen:
dc.l backgroundBitplanes1
tilemap:
incbin "out/foreground.bin"
backgroundTilemap:
incbin "out/background.bin"
panel:
incbin "out/panel.bin"
map:
include "out/foreground-map.s"
dc.w $FFFF
itemsMap:
include "out/items-indexes.s"
dc.w $FFFF
mapSize:
dc.l itemsMap-map
backgroundMap:
include "out/background-map.s"
dc.w $FFFF
foregroundScrollPixels:
dc.l FOREGROUND_SCROLL_PIXELS
foregroundScrollX:
dc.l 0
backgroundScrollX:
dc.l 0
frameCount:
dc.l 0
verticalBlankCount:
dc.l 0
moving:
dc.w 0
fadePtr:
dc.l fade
animIndex:
ds.l 16,0
deAnimIndex:
ds.l 16,0
animIndexPatternPtr:
dc.l animIndexPattern
animIndexPattern:
dc.l 0
dc.l 8*4
dc.l 10*4
dc.l 16*4
dc.l 12*4
dc.l 14*4
dc.l 16*4
dc.l 0
dc.l 0
dc.l 16*4
dc.l 10*4
dc.l 6*4
dc.l 2*4
dc.l 16*4
dc.l 14*4
dc.l 0
dc.l 0
dc.l 8*4
dc.l 10*4
dc.l 16*4
dc.l 12*4
dc.l 14*4
dc.l 16*4
dc.l 0
dc.l 0
dc.l 16*4
dc.l 10*4
dc.l 8*4
dc.l 12*4
dc.l 4*4
dc.l 12*4
dc.l 0
dc.l $ffffffff
deAnimIndexPatternPtr:
dc.l deAnimIndexPattern
deAnimIndexPattern:
dc.l 0
dc.l 0*4
dc.l 2*4
dc.l 4*4
dc.l 2*4
dc.l 6*4
dc.l 2*4
dc.l 0
dc.l 0
dc.l 8*4
dc.l 4*4
dc.l 6*4
dc.l 2*4
dc.l 4*4
dc.l 2*4
dc.l 0
dc.l 0
dc.l 0*4
dc.l 4*4
dc.l 2*4
dc.l 4*4
dc.l 2*4
dc.l 6*4
dc.l 0
dc.l 0
dc.l 6*4
dc.l 0*4
dc.l 2*4
dc.l 2*4
dc.l 8*4
dc.l 2*4
dc.l 0
dc.l $ffffffff
greyPalette:
include "tilemap-grey-table.s"
tilemapPalette:
include "tilemap-palette-table.s"
fade:
include "fade.s"
section .bss
foregroundBitplanes1:
ds.b IMAGESIZE*3
foregroundBitplanes2:
ds.b IMAGESIZE*3
backgroundBitplanes1:
ds.b IMAGESIZE*2
startUserstack:
ds.b $1000 ; size of stack
userstack:
end
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