pokered/home/header.asm

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1.1 KiB
NASM
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; rst vectors (unused)
SECTION "rst0", ROM0[$0000]
rst $38
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ds $08 - @, 0 ; unused
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SECTION "rst8", ROM0[$0008]
rst $38
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ds $10 - @, 0 ; unused
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SECTION "rst10", ROM0[$0010]
rst $38
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ds $18 - @, 0 ; unused
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SECTION "rst18", ROM0[$0018]
rst $38
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ds $20 - @, 0 ; unused
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SECTION "rst20", ROM0[$0020]
rst $38
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ds $28 - @, 0 ; unused
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SECTION "rst28", ROM0[$0028]
rst $38
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ds $30 - @, 0 ; unused
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SECTION "rst30", ROM0[$0030]
rst $38
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ds $38 - @, 0 ; unused
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SECTION "rst38", ROM0[$0038]
rst $38
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ds $40 - @, 0 ; unused
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; Game Boy hardware interrupts
SECTION "vblank", ROM0[$0040]
jp VBlank
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ds $48 - @, 0 ; unused
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SECTION "lcd", ROM0[$0048]
rst $38
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ds $50 - @, 0 ; unused
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SECTION "timer", ROM0[$0050]
jp Timer
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ds $58 - @, 0 ; unused
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SECTION "serial", ROM0[$0058]
jp Serial
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ds $60 - @, 0 ; unused
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SECTION "joypad", ROM0[$0060]
reti
SECTION "Header", ROM0[$0100]
Start::
; Nintendo requires all Game Boy ROMs to begin with a nop ($00) and a jp ($C3)
; to the starting address.
nop
jp _Start
; The Game Boy cartridge header data is patched over by rgbfix.
; This makes sure it doesn't get used for anything else.
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ds $0150 - @