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Ensure that the cartridge header is patched over all $00s, and comment on the entry point format

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This commit is contained in:
Rangi 2020-04-06 13:35:38 -04:00
parent 10909e6b43
commit a40ddc4668
1 changed files with 6 additions and 5 deletions
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11
home/header.asm
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@ -56,14 +56,15 @@ SECTION "joypad", ROM0[$0060]
jp Joypad jp Joypad
; Game Boy cartridge header
SECTION "Header", ROM0[$0100] SECTION "Header", ROM0[$0100]
Start:: Start::
; Nintendo requires all Game Boy ROMs to begin with a nop ($00) and a jp ($C3)
; to the starting address.
nop nop
jp _Start jp _Start
; The cartridge header data is filled in by rgbfix. ; The Game Boy cartridge header data is patched over by rgbfix.
; This makes sure it doesn't get used. ; This makes sure it doesn't get used for anything else.
ds $0150 - @
ds $0150 - @, $00