264 lines
3.4 KiB
ArmAsm
264 lines
3.4 KiB
ArmAsm
;
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; hisprite.s
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;
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; Created by Quinn Dunki on 7/19/16
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; Copyright (c) 2015 One Girl, One Laptop Productions. All rights reserved.
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;
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.org $6000
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.include "macros.s"
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; Softswitches
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TEXT = $c050
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HIRES1 = $c057
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HIRES2 = $c058
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; ROM entry points
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COUT = $fded
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ROMWAIT = $fca8
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; Zero page locations we use (unused by Monitor, Applesoft, or ProDOS)
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PARAM0 = $06
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PARAM1 = $07
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PARAM2 = $08
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PARAM3 = $09
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SCRATCH0 = $19
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SCRATCH1 = $1a
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SPRITEPTR_L = $1b
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SPRITEPTR_H = $1c
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MAXSPRITEINDEX = 5 ; Sprite count - 1
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MAXPOSX = 127 ; This demo doesn't wanna do 16 bit math
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MAXPOSY = 127
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; Macros
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.macro BLITBYTE xPos,yPos,addr
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lda #xPos
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sta PARAM0
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lda #yPos
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sta PARAM1
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lda #<addr
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sta PARAM2
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lda #>addr
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sta PARAM3
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jsr BlitSpriteOnByte
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.endmacro
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.macro BLIT xPos,yPos,addr
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lda #xPos
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sta PARAM0
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lda #yPos
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sta PARAM1
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lda #<addr
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sta PARAM2
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lda #>addr
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sta PARAM3
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jsr BlitSprite
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.endmacro
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.macro WAIT
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lda #$80
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jsr $fca8
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.endmacro
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main:
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jsr EnableHires
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lda #$00
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jsr VenetianFill
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mainLoop:
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; Draw sprites
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renderLoop:
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; Find our sprite pointer
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lda spriteNum
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asl
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tax
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lda META_BUFFERS+1,x
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sta SPRITEPTR_H
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lda META_BUFFERS,x
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sta SPRITEPTR_L
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; Find Y coordinate
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ldy #1
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lda (SPRITEPTR_L),y
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sta PARAM1
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; Find X coordinate
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ldy #0
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lda (SPRITEPTR_L),y
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sta PARAM0
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jsr BOXW_MAG
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; Next sprite
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dec spriteNum
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bmi restartList
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jmp renderLoop
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restartList:
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lda #MAXSPRITEINDEX
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sta spriteNum
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VBL_SYNC
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; Background restore
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backgroundLoop:
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; Find our sprite pointer
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lda spriteNum
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asl
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tax
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lda META_BUFFERS+1,x
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sta SPRITEPTR_H
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lda META_BUFFERS,x
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sta SPRITEPTR_L
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; Find Y coordinate
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ldy #1
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lda (SPRITEPTR_L),y
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sta PARAM1
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; Find X coordinate
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ldy #0
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lda (SPRITEPTR_L),y
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sta PARAM0
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jsr BlackRect
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; Next sprite
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dec spriteNum
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bmi backgroundRestartList
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jmp backgroundLoop
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backgroundRestartList:
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lda #MAXSPRITEINDEX
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sta spriteNum
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jmp mainLoop ; Skip movement
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movementLoop:
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; Find our sprite pointer
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lda spriteNum
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asl
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tax
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lda META_BUFFERS+1,x
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sta SPRITEPTR_H
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lda META_BUFFERS,x
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sta SPRITEPTR_L
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; Apply X velocity to X coordinate
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clc
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ldy #0
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lda (SPRITEPTR_L),y
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ldy #2
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adc (SPRITEPTR_L),y
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bmi flipX
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cmp #MAXPOSX
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bpl flipX
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; Store the new X
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ldy #0
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sta (SPRITEPTR_L),y
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adjustY:
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; Apply Y velocity to Y coordinate
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clc
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ldy #1
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lda (SPRITEPTR_L),y
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ldy #3
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adc (SPRITEPTR_L),y
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bmi flipY
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cmp #MAXPOSY
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bpl flipY
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; Store the new Y
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ldy #1
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sta (SPRITEPTR_L),y
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continueMovementList:
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dec spriteNum
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bmi movementRestartList
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jmp movementLoop
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flipX:
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lda (SPRITEPTR_L),y
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eor #$ff
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inc
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sta (SPRITEPTR_L),y
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bra adjustY
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flipY:
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lda (SPRITEPTR_L),y
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eor #$ff
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inc
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sta (SPRITEPTR_L),y
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bra continueMovementList
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movementRestartList:
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lda #MAXSPRITEINDEX
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sta spriteNum
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jmp renderLoop
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rts
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; delayShort
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; Sleeps for ~1/30th second
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;
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delayShort:
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SAVE_AXY
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ldy #$06 ; Loop a bit
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delayShortOuter:
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ldx #$ff
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delayShortInner:
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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dex
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bne delayShortInner
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dey
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bne delayShortOuter
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RESTORE_AXY
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rts
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spriteNum:
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.byte MAXSPRITEINDEX
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bgFilename:
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.byte "KOL",0
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.include "graphics.s"
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.include "hgrtableX.s"
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.include "hgrtableY.s"
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.include "spriteBuffers.s"
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.include "spritegen0.s"
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;.include "spritegen1.s"
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;.include "spritegen2.s"
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;.include "spritegen3.s"
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;.include "spritegen4.s"
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; Suppress some linker warnings - Must be the last thing in the file
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.SEGMENT "ZPSAVE"
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.SEGMENT "EXEHDR"
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.SEGMENT "STARTUP"
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.SEGMENT "INIT"
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.SEGMENT "LOWCODE"
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