250 lines
4.0 KiB
Plaintext
250 lines
4.0 KiB
Plaintext
#include "memmap.i65"
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#include "dma.i65"
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GAME_MAIN:
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sep #$20 : .as
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jsr snes_init
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jsr setup_gfx
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jsr setup_hdma
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jsr tests
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jsr colortest
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sep #$20 : .as
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lda #$00
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sta @AVR_CMD
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sta @AVR_PARAM
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rep #$20 : .al
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sta @AVR_PARAM+1
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jsr menu_init
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sep #$20 : .as
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jsr menuloop
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cli
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stz $4200
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jmp @infloop ;infinite loop in WRAM
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colortest:
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sep #$20 : .as
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rep #$10 : .xl
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stz $2130
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rts
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setup_gfx:
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sep #$20 : .as
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rep #$10 : .xl
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stz $420b
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stz $420c
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;clear tilemap buffers
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ldx #$0000
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stx $2181
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lda #$01
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sta $2183
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DMA0(#$08, #0, #^zero, #!zero, #$80)
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;copy 2bpp font (can be used as 4-bit lores font!)
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ldx #$4000
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stx $2116
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DMA0(#$01, #$2000, #^font2, #!font2, #$18)
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;copy 4bpp font
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ldx #$0000
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stx $2116
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DMA0(#$01, #$4000, #^font4, #!font4, #$18)
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;clear BG1 tilemap
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ldx #BG1_TILE_BASE
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stx $2116
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DMA0(#$09, #$800, #^zero, #!zero, #$18)
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;clear BG2 tilemap
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ldx #BG2_TILE_BASE
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stx $2116
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DMA0(#$09, #$800, #^zero, #!zero, #$18)
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;copy logo tiles
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ldx #$2000
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stx $2116
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DMA0(#$01, #$3480, #^logo, #!logo, #$18)
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;copy logo tilemap
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ldx #BG1_TILE_BASE
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stx $2116
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DMA0(#$01, #$280, #^logomap, #!logomap, #$18)
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;set palette
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stz $2121
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DMA0(#$00, #$200, #^palette, #!palette, #$22)
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;copy hdma tables so we can work "without" the cartridge
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;palette
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lda #^hdma_pal
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ldx #!hdma_pal
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stx $2181
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sta $2183
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DMA0(#$00, #52, #^hdma_pal_src, #!hdma_pal_src, #$80)
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;CG addr for palette
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lda #^hdma_cg_addr
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ldx #!hdma_cg_addr
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stx $2181
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sta $2183
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DMA0(#$00, #227, #^hdma_cg_addr_src, #!hdma_cg_addr_src, #$80)
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;screen mode
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lda #^hdma_mode
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ldx #!hdma_mode
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stx $2181
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sta $2183
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DMA0(#$00, #5, #^hdma_mode_src, #!hdma_mode_src, #$80)
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;bg scroll
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lda #^hdma_scroll
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ldx #!hdma_scroll
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stx $2181
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sta $2183
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DMA0(#$00, #11, #^hdma_scroll_src, #!hdma_scroll_src, #$80);
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;color math
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lda #^hdma_math
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ldx #!hdma_math
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stx $2181
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sta $2183
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DMA0(#$00, #19, #^hdma_math_src, #!hdma_math_src, #$80);
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;copy infinite loop to WRAM
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lda #$80
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sta infloop
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lda #$fe
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sta infloop+1
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rts
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tests:
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sep #$20 : .as ;8-bit accumulator
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rep #$10 : .xl ;16-bit index
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lda #$03 ;mode 3, mode 5 via HDMA :D
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sta $2105
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lda #$54 ;Tilemap addr 0xA800
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sta $2107 ;for BG1
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lda #$50 ;Tilemap addr 0xA000
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sta $2108 ;for BG2
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lda #$40 ;chr base addr:
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sta $210b ;BG1=0x0000, BG2=0x8000
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lda #$03 ;enable BG1+BG2
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sta $212c ;BG Main
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sta $212d ;BG Sub
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lda #$00 ;224 (01=448)
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sta $2133 ;
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lda #$00
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sta $2130
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stz $2121
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lda #$0f
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sta $2100 ;screen on, full brightness
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lda #9
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sta bar_yl
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rts
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snes_init:
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sep #$20 : .as ;8-bit accumulator
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rep #$10 : .xl ;16-bit index
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lda #$01
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sta $420d ; FAAAAAST
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lda #$8f
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sta $2100 ;INIDISP: force blank
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stz $2101 ;
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stz $2102 ;
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stz $2103 ;
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stz $2104 ; (OAM Data?!)
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stz $2104 ; (OAM Data?!)
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stz $2105 ;
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stz $2106 ;
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stz $2107 ;
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stz $2108 ;
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stz $2109 ;
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stz $210a ;
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stz $210b ;
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stz $210c ;
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stz $210d ;
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stz $210d ;
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stz $210e ;
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stz $210e ;
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stz $210f ;
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stz $210f ;
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lda #$05
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sta $2110 ;
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stz $2110 ;
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stz $2111 ;
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stz $2111 ;
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stz $2112 ;
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stz $2112 ;
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stz $2113 ;
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stz $2113 ;
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stz $2114 ;
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stz $2114 ;
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lda #$80
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sta $2115 ;
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stz $2116 ;
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stz $2117 ;
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stz $2118 ;(VRAM Data?!)
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stz $2119 ;(VRAM Data?!)
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stz $211a ;
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stz $211b ;
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lda #$01
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sta $211b ;
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stz $211c ;
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stz $211c ;
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stz $211d ;
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stz $211d ;
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stz $211e ;
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sta $211e ;
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stz $211f ;
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stz $211f ;
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stz $2120 ;
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stz $2120 ;
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stz $2121 ;
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stz $2122 ; (CG Data?!)
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stz $2123 ;
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stz $2124 ;
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stz $2125 ;
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stz $2126 ;
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stz $2127 ;
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stz $2128 ;
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stz $2129 ;
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stz $212a ;
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stz $212b ;
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stz $212c ;
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stz $212d ;
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stz $212e ;
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lda #$30
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sta $2130 ;
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stz $2131 ;
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lda #$e0
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sta $2132 ;
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stz $2133 ;
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stz $4200 ;
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lda #$ff
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sta $4201 ;
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stz $4202 ;
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stz $4203 ;
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stz $4204 ;
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stz $4205 ;
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stz $4206 ;
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stz $4207 ;
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stz $4208 ;
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stz $4209 ;
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stz $420a ;
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stz $420b ;
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stz $420c ;
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;clear WRAM lower page
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; ldx #$0200
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; stx $2181
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; lda #$00
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; sta $2183
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; DMA0(#$08, #$FF00, #^zero, #!zero, #$80)
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; ldx #$0000
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; stx $2181
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; lda #$00
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; sta $2183
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; DMA0(#$08, #$1e0, #^zero, #!zero, #$80)
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rts
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