diff options
Diffstat (limited to 'main.asm')
| -rw-r--r-- | main.asm | 173 |
1 files changed, 166 insertions, 7 deletions
@@ -2,6 +2,7 @@ option output-file,"main.lib" option output-format,lib + option +address24 org $8000 bank 0 @@ -10,28 +11,183 @@ ; include "snes.inc" include "macros.inc" + import "tiles.lib",labels + import "maps.lib",labels sei clc xce - .x16 - rep #$10 + INDEX16 ldx #$1fff txs - .x8 - .m8 - sep #$30 ; X,Y,A are 8 bit numbers + ACC8 + INDEX8 + jsr InitSNES + cli - include "init.inc" + ; Clear VRAM + ; + lda #$80 + sta VMAIN + stz VMADDL + stz VMADDH + DMA 9,zero,$18,0 - cli + ; Copy 4-colour tiles + ; + stz VMADDL + stz VMADDH + DMA 1,Col4Tiles,$18,Col4TilesLen + + ; Copy 16-colour tiles + ; + stz VMADDL + lda #$10 + sta VMADDH + DMA 1,Col16Tiles,$18,Col16TilesLen + + ; Copy sprites + ; + stz VMADDL + lda #$a0 + sta VMADDH + DMA 1,SpriteData,$18,SpriteDataLen + + ; Copy palette + ; + stz CGADD + DMA 0,PaletteData,$22,PaletteDataLen + + ; Copy BG3 + ; +copybg3: + INDEX16 + ldx #$0 + ldy #32*32 + stz VMADDL + lda #$40 + sta VMADDH +.loop + lda BG3Map,x + sta VMDATAL + stz VMDATAH + inx + dey + bne loop + X8 + + ; Initialise the screen + ; + lda #$01 + sta BGMODE + lda #$1f + sta TM + + lda #$44 + sta BG12NBA + stz BG34NBA + + lda #$60 + sta BG1SC + lda #$80 + sta BG2SC + lda #$40 + sta BG3SC + + lda #$0f + sta INIDISP ; Loop forever. Forever: jmp Forever +InitSNES: + lda #$8F + sta INIDISP + stz OBSEL + stz OAMADDL + stz OAMADDH + stz BGMODE + stz MOSAIC + stz BG1SC + stz BG2SC + stz BG3SC + stz BG4SC + stz BG12NBA + stz BG34NBA + stz BG1VOFS + stz BG1VOFS + stz BG2VOFS + stz BG2VOFS + stz BG3VOFS + stz BG3VOFS + stz BG4VOFS + stz BG4VOFS + stz BG1HOFS + stz BG1HOFS + stz BG2HOFS + stz BG2HOFS + stz BG3HOFS + stz BG3HOFS + stz BG4HOFS + stz BG4HOFS + lda #$80 + sta VMAIN + stz VMADDL + stz VMADDH + stz M7SEL + stz M7A + lda #$01 + sta M7A + stz M7B + stz M7B + stz M7C + stz M7C + stz M7D + sta M7D + stz M7X + stz M7X + stz M7Y + stz M7Y + stz CGADD + stz W12SEL + stz W34SEL + stz WOBJSEL + stz WH0 + stz WH1 + stz WH2 + stz WH3 + stz WBGLOG + stz WOBJLOG + sta TM + stz TS + stz TMW + stz TSW + lda #$30 + sta CGWSEL + stz CGADSUB + lda #$E0 + sta COLDATA + stz SETINI + stz NMITIMEN + lda #$FF + sta WRIO + stz WRMPYA + stz WRMPYB + stz WRDIVL + stz WRDIVH + stz WRDIVB + stz HTIMEL + stz HTIMEH + stz VTIMEL + stz VTIMEH + stz MDMAEN + stz HDMAEN + stz MEMSEL + rts + ; IRQ vectors ; @@ -41,3 +197,6 @@ vbl_handler: irq_handler: rti + +zero: + db 0 |