mirror of
https://frontier.innolan.net/github/AmigaExamples.git
synced 2026-09-12 22:32:43 +00:00
138 lines
2.2 KiB
ArmAsm
138 lines
2.2 KiB
ArmAsm
include "includes.i"
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xdef PokeBitplanePointers
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xdef copperList
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xdef onscreen
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xdef offscreen
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xdef copperListBplPtr
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byteMap:
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dc.l Entry
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dc.l endCode-byteMap
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Entry:
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lea userstack,a7
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lea CUSTOM,a6
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move #$7ff,DMACON(a6) ; disable all dma
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move #$7fff,INTENA(a6) ; disable all interrupts
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jsr InstallPalette
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lea Level3InterruptHandler,a3
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move.l a3,LVL3_INT_VECTOR
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move.w #(INTF_SETCLR|INTF_VERTB|INTF_INTEN),INTENA(a6)
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move.l offscreen,a0
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move.l #4,d0 ; color#
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jsr CpuFillColor
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move.l onscreen,a0
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move.l #4,d0 ; color#
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jsr CpuFillColor
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jsr SwitchBuffers
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jsr Init ; enable the playfield
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.mainLoop:
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move.l offscreen,a0
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move.l #4,d0 ; color#
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jsr CpuFillColor
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move.l direction,d0
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add.l d0,xpos
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move.l xpos,d0
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move.l #50,d1
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move.l offscreen,a0
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lea text,a1
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jsr DrawText
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jsr WaitVerticalBlank
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jsr SwitchBuffers
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cmp.l #320-(26*8),xpos
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ble .notright
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move.l direction,d0
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muls.w #-1,d0
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move.l d0,direction
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bra .mainLoop
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.notright:
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cmp.l #0,xpos
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bne .mainLoop
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move.l direction,d0
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muls.w #-1,d0
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move.l d0,direction
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bra .mainLoop
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text:
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dc.b "My first text on an Amiga!"
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dc.b 0
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align 4
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xpos:
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dc.l 0
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direction:
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dc.l 1
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Level3InterruptHandler:
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movem.l d0-a6,-(sp)
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lea CUSTOM,a6
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.checkVerticalBlank:
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move.w INTREQR(a6),d0
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and.w #INTF_VERTB,d0
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beq.s .checkCopper
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.verticalBlank:
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move.w #INTF_VERTB,INTREQ(a6) ; clear interrupt bit
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.checkCopper:
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move.w INTREQR(a6),d0
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and.w #INTF_COPER,d0
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beq.s .interruptComplete
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.copperInterrupt:
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move.w #INTF_COPER,INTREQ(a6) ; clear interrupt bit
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.interruptComplete:
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movem.l (sp)+,d0-a6
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rte
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copperList:
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copperListBplPtr:
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dc.w BPL1PTL,0
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dc.w BPL1PTH,0
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dc.w BPL2PTL,0
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dc.w BPL2PTH,0
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dc.w BPL3PTL,0
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dc.w BPL3PTH,0
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dc.w BPL4PTL,0
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dc.w BPL4PTH,0
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dc.w BPL5PTL,0
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dc.w BPL5PTH,0
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dc.w BPL6PTL,0
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dc.w BPL6PTH,0
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dc.w $106,$c00 ;AGA sprites, palette and dual playfield reset
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dc.w $1FC,0 ;AGA sprites and burst reset
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dc.l $fffffffe
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dc.l $fffffffe
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InstallPalette:
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include "out/font-palette.s"
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rts
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onscreen:
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dc.l bitplanes1
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offscreen:
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dc.l bitplanes2
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section .bss
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bitplanes1:
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ds.b IMAGESIZE+(512)
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bitplanes2:
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ds.b IMAGESIZE+(512*2)
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startUserstack:
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ds.b $1000 ; size of stack
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userstack:
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