103 lines
2.9 KiB
NASM
103 lines
2.9 KiB
NASM
org $02E94A
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JSL CheckForSpecialAreaGraphics
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org $0ED5A8
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OverworldPalettesLoader:
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; ==============================================================================
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org $3F8000
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CheckForChangeGraphicsNormalLoadBoat:
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{
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LDA $8A : CMP.b #$30 : BNE .boat_area
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PHB : PHK : PLB
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JSR ApplyGraphics1
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JSR ApplyGraphics2
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PLB
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RTL
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.boat_area
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RTL
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}
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CheckForSpecialAreaGraphics:
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{
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JSL OverworldPalettesLoader
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LDA $8A : CMP.b #$81 : BNE .korok_area
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PHB : PHK : PLB
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JSL ApplyKorokSpriteSheets
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PLB
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.korok_area
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RTL
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}
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; ==============================================================================
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ApplyGraphics1:
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{
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REP #$20 ; A = 16, XY = 8
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LDX #$80 : STX $2115 ; Set the video port register every time we write it increase by 1
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LDA #$2C00 : STA $2116 ; Destination of the DMA $5800 in vram <- this need to be divided by 2
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LDA #$1801 : STA $4300 ; DMA Transfer Mode and destination register
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; "001 => 2 registers write once (2 bytes: p, p+1)"
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LDA.w #BoatBitmap : STA $4302 ; Source address where you want gfx from ROM
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LDX.b #BoatBitmap>>16 : STX $4304
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LDA #$2000 : STA $4305 ; size of the transfer 4 sheets of $800 each
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LDX #$01 : STX $420B ; Do the DMA
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SEP #$30
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RTS
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BoatBitmap:
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incbin gfx/boat.bin
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}
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ApplyGraphics2:
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{
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REP #$20 ; A = 16, XY = 8
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LDX #$80 : STX $2115 ; Set the video port register every time we write it increase by 1
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LDA #$5000 : STA $2116 ; Destination of the DMA $7800 in vram <- this need to be divided by 2
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LDA #$1801 : STA $4300 ; DMA Transfer Mode and destination register
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; "001 => 2 registers write once (2 bytes: p, p+1)"
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LDA.w #AdditionalBitmap : STA $4302 ; Source address where you want gfx from ROM
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LDX.b #AdditionalBitmap>>16 : STX $4304
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LDA #$2000 : STA $4305 ; size of the transfer 4 sheets of $800 each
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LDX #$01 : STX $420B ; Do the DMA
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SEP #$30
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RTS
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AdditionalBitmap:
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incbin gfx/boat2.bin
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}
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; ==============================================================================
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ApplyKorokSpriteSheets:
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{
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REP #$20 ; A = 16, XY = 8
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LDX #$80 : STX $2100 ; turn the screen off (required)
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LDX #$80 : STX $2115 ; Set the video port register every time we write it increase by 1
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LDA #$5000 : STA $2116 ; Destination of the DMA $5800 in vram <- this need to be divided by 2
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LDA #$1801 : STA $4300 ; DMA Transfer Mode and destination register
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; "001 => 2 registers write once (2 bytes: p, p+1)"
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LDA.w #KorokSpriteSheets : STA $4302 ; Source address where you want gfx from ROM
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LDX.b #KorokSpriteSheets>>16 : STX $4304
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LDA #$1800 : STA $4305 ; size of the transfer 4 sheets of $800 each
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LDX #$01 : STX $420B ; Do the DMA
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LDX #$0F : STX $2100 ; Turn the screen back on
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SEP #$30
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RTL
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KorokSpriteSheets:
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incbin gfx/korok.bin
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}
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