Those are codes used by Cowering's ROM renaming utilities (GoodNES, GoodGen, GoodPCE, etc.). There's a full list in the documentation, but from what I remember: A - Alternate version (correct dump, but of another version of the cartridge) C - Bad checksum (?) H - Hacked X - Bad header (?) ! - Verified good dump A number instead of J, U, or E - Released in another region, most commonly I've seen (4), which I believe normally indicates a Brazil version. I'm not 100% sure on these. RTFM . |