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Copy pathloadbackground.asm
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loadbackground.asm
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.include "consts.inc"
.include "header.inc"
.include "reset.inc"
.include "utils.inc"
.segment "ZEROPAGE"
Frame: .res 1
Clock60: .res 1
BackgroundPointer: .res 2
.segment "CODE"
.proc LoadPalette
PPU_SETADDR $3F00
LDY #0
LOOPPALETTE:
LDA PaletteData,Y
STA PPU_DATA
INY
CPY #32
BNE LOOPPALETTE
RTS
.endproc
.proc LoadBackground
LDA #<BackgroundData
STA BackgroundPointer
LDA #>BackgroundData
STA BackgroundPointer+1
PPU_SETADDR $2000
LDX #$00
LDY #$00
OUTER_LOOP:
INNER_LOOP:
LDA (BackgroundPointer),y
STA PPU_DATA
INY
CPY #0
BEQ INCREASE_HI_BYTE
JMP INNER_LOOP
INCREASE_HI_BYTE:
INC BackgroundPointer+1
INX
CPX #4
BNE OUTER_LOOP
RTS
.endproc
RESET:
INIT_NES
LDA #0
STA Frame
MAIN:
JSR LoadPalette
JSR LoadBackground
ENABLE_PPU_RENDERING:
LDA #%10010000
STA PPU_CTRL
LDA #0
STA PPU_SCROLL
STA PPU_SCROLL
LDA #%00011110
STA PPU_MASK
LOOPFOREVER:
JMP LOOPFOREVER
NMI:
INC Frame
LDA Frame
CMP #60
BNE NMI_RETURN
INC Clock60
LDA #0
STA Frame
NMI_RETURN:
RTI
IRQ:
RTI
PaletteData:
.byte $22,$29,$1A,$0F, $22,$36,$17,$0F, $22,$30,$21,$0F, $22,$27,$17,$0F
.byte $22,$16,$27,$18, $22,$1A,$30,$27, $22,$16,$30,$27, $22,$0F,$36,$17
BackgroundData:
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$36,$37,$36,$37,$36,$37,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$35,$25,$25,$25,$25,$25,$25,$38,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$36,$37,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$39,$3A,$3B,$3A,$3B,$3A,$3B,$3C,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$35,$25,$25,$38,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$39,$3A,$3B,$3C,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$53,$54,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$55,$56,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$53,$54,$24,$24,$24,$24,$24,$24,$24,$24,$45,$45,$53,$54,$45,$45,$53,$54,$45,$45,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$55,$56,$24,$24,$24,$24,$24,$24,$24,$24,$47,$47,$55,$56,$47,$47,$55,$56,$47,$47,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$60,$61,$62,$63,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$24,$31,$32,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$64,$65,$66,$67,$24,$24,$24,$24
.byte $24,$24,$24,$24,$24,$30,$26,$34,$33,$24,$24,$24,$24,$36,$37,$36,$37,$24,$24,$24,$24,$24,$24,$24,$68,$69,$26,$6A,$24,$24,$24,$24
.byte $24,$24,$24,$24,$30,$26,$26,$26,$26,$33,$24,$24,$35,$25,$25,$25,$25,$38,$24,$24,$24,$24,$24,$24,$68,$69,$26,$6A,$24,$24,$24,$24
.byte $B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5
.byte $B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7
.byte $B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B6
.byte $B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7
.byte $B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5,$B4,$B5
.byte $B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7,$B6,$B7
AttributeData:
.byte %00000000, %00000000, %00000000, %00000000, %00000000, %00000000, %00000000, %00000000
.byte %00000000, %10101010, %10101010, %00000000, %00000000, %00000000, %10101010, %00000000
.byte %00000000, %00000000, %00000000, %00000000, %11111111, %00000000, %00000000, %00000000
.byte %00000000, %00000000, %00000000, %00000000, %00000000, %00000000, %00000000, %00000000
.byte %11111111, %00000000, %00000000, %00001111, %00001111, %00000011, %00000000, %00000000
.byte %00000000, %00000000, %00000000, %00000000, %00000000, %00000000, %00000000, %00000000
.byte %11111111, %11111111, %11111111, %11111111, %11111111, %11111111, %11111111, %11111111
.byte %11111111, %11111111, %11111111, %11111111, %11111111, %11111111, %11111111, %11111111
.segment "CHARS"
.incbin "mario.chr"
.segment "VECTORS"
.word NMI
.word RESET
.word IRQ