diff options
| author | Rangi <remy.oukaour+rangi42@gmail.com> | 2020-04-06 13:35:38 -0400 |
|---|---|---|
| committer | Rangi <remy.oukaour+rangi42@gmail.com> | 2020-04-06 14:44:07 -0400 |
| commit | a40ddc4668622c9068c3bf832e804ca7c9b6b4d7 (patch) | |
| tree | a357c448855286ae65eec1f1a0f8c27a70779761 | |
| parent | 10909e6b437f6c137c794337e94f32cdc7fe9eb4 (diff) | |
Ensure that the cartridge header is patched over all $00s, and comment on the entry point format
| -rw-r--r-- | home/header.asm | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/home/header.asm b/home/header.asm index 40041e75d..2e8c58949 100644 --- a/home/header.asm +++ b/home/header.asm @@ -56,14 +56,15 @@ SECTION "joypad", ROM0[$0060] jp Joypad -; Game Boy cartridge header - 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 cartridge header data is filled in by rgbfix. -; This makes sure it doesn't get used. - ds $0150 - @ +; The Game Boy cartridge header data is patched over by rgbfix. +; This makes sure it doesn't get used for anything else. + + ds $0150 - @, $00 |