Add include files
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with-asar/src/header.inc
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25
with-asar/src/header.inc
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includeonce
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lorom
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org $00FFE0
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; Native mode
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dw $FFFF
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dw $FFFF
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dw $FFFF
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dw $FFFF
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dw $FFFF
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dw VBlank
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dw $FFFF
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dw $FFFF
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; Emulation mode
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dw $FFFF
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dw $FFFF
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dw $FFFF
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dw $FFFF
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dw $FFFF
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dw $FFFF
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dw Reset
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dw $FFFF
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102
with-asar/src/init.asm
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102
with-asar/src/init.asm
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includeonce
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macro init()
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sei ; Disabled interrupts
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clc ; clear carry to switch to native mode
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xce ; Xchange carry & emulation bit. native mode
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rep #$18 ; Binary mode (decimal mode off)
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ldx #$1FFF ; set stack to $1FFF
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txs
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jsr Init
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endmacro
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org $008000
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Init:
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sep #$30 ; X,Y,A are 8 bit numbers
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lda #$8F ; screen off, full brightness
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sta $2100 ; brightness + screen enable register
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stz $2101 ; Sprite register (size + address in VRAM)
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stz $2102 ; Sprite registers (address of sprite memory [OAM])
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stz $2103 ; "" ""
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stz $2105 ; Mode 0, = Graphic mode register
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stz $2106 ; noplanes, no mosaic, = Mosaic register
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stz $2107 ; Plane 0 map VRAM location
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stz $2108 ; Plane 1 map VRAM location
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stz $2109 ; Plane 2 map VRAM location
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stz $210A ; Plane 3 map VRAM location
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stz $210B ; Plane 0+1 Tile data location
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stz $210C ; Plane 2+3 Tile data location
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stz $210D ; Plane 0 scroll x (first 8 bits)
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stz $210D ; Plane 0 scroll x (last 3 bits) #$0 - #$07ff
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lda #$FF ; The top pixel drawn on the screen isn't the top one in the tilemap, it's the one above that.
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sta $210E ; Plane 0 scroll y (first 8 bits)
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sta $2110 ; Plane 1 scroll y (first 8 bits)
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sta $2112 ; Plane 2 scroll y (first 8 bits)
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sta $2114 ; Plane 3 scroll y (first 8 bits)
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lda #$07 ; Since this could get quite annoying, it's better to edit the scrolling registers to fix this.
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sta $210E ; Plane 0 scroll y (last 3 bits) #$0 - #$07ff
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sta $2110 ; Plane 1 scroll y (last 3 bits) #$0 - #$07ff
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sta $2112 ; Plane 2 scroll y (last 3 bits) #$0 - #$07ff
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sta $2114 ; Plane 3 scroll y (last 3 bits) #$0 - #$07ff
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stz $210F ; Plane 1 scroll x (first 8 bits)
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stz $210F ; Plane 1 scroll x (last 3 bits) #$0 - #$07ff
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stz $2111 ; Plane 2 scroll x (first 8 bits)
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stz $2111 ; Plane 2 scroll x (last 3 bits) #$0 - #$07ff
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stz $2113 ; Plane 3 scroll x (first 8 bits)
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stz $2113 ; Plane 3 scroll x (last 3 bits) #$0 - #$07ff
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lda #$80 ; increase VRAM address after writing to $2119
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sta $2115 ; VRAM address increment register
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stz $2116 ; VRAM address low
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stz $2117 ; VRAM address high
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stz $211A ; Initial Mode 7 setting register
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stz $211B ; Mode 7 matrix parameter A register (low)
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lda #$01
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sta $211B ; Mode 7 matrix parameter A register (high)
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stz $211C ; Mode 7 matrix parameter B register (low)
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stz $211C ; Mode 7 matrix parameter B register (high)
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stz $211D ; Mode 7 matrix parameter C register (low)
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stz $211D ; Mode 7 matrix parameter C register (high)
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stz $211E ; Mode 7 matrix parameter D register (low)
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sta $211E ; Mode 7 matrix parameter D register (high)
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stz $211F ; Mode 7 center position X register (low)
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stz $211F ; Mode 7 center position X register (high)
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stz $2120 ; Mode 7 center position Y register (low)
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stz $2120 ; Mode 7 center position Y register (high)
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stz $2121 ; Color number register ($0-ff)
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stz $2123 ; BG1 & BG2 Window mask setting register
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stz $2124 ; BG3 & BG4 Window mask setting register
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stz $2125 ; OBJ & Color Window mask setting register
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stz $2126 ; Window 1 left position register
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stz $2127 ; Window 2 left position register
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stz $2128 ; Window 3 left position register
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stz $2129 ; Window 4 left position register
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stz $212A ; BG1, BG2, BG3, BG4 Window Logic register
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stz $212B ; OBJ, Color Window Logic Register (or,and,xor,xnor)
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stz $212C ; Main Screen designation (planes, sprites enable)
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stz $212D ; Sub Screen designation
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stz $212E ; Window mask for Main Screen
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stz $212F ; Window mask for Sub Screen
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lda #$30
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sta $2130 ; Color addition & screen addition init setting
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stz $2131 ; Add/Sub sub designation for screen, sprite, color
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lda #$E0
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sta $2132 ; color data for addition/subtraction
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stz $2133 ; Screen setting (interlace x,y/enable SFX data)
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stz $4200 ; Enable V-blank, interrupt, Joypad register
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lda #$FF
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sta $4201 ; Programmable I/O port
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stz $4202 ; Multiplicand A
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stz $4203 ; Multiplier B
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stz $4204 ; Multiplier C
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stz $4205 ; Multiplicand C
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stz $4206 ; Divisor B
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stz $4207 ; Horizontal Count Timer
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stz $4208 ; Horizontal Count Timer MSB (most significant bit)
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stz $4209 ; Vertical Count Timer
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stz $420A ; Vertical Count Timer MSB
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stz $420B ; General DMA enable (bits 0-7)
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stz $420C ; Horizontal DMA (HDMA) enable (bits 0-7)
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stz $420D ; Access cycle designation (slow/fast rom)
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cli ; Enable interrupts
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rts
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@ -0,0 +1,2 @@
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incsrc header.inc
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incsrc init.asm
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