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Author Topic: Is there a way to actually patch a NES Game Genie code to rom?  (Read 2 times)
don knotts
Guest
« on: July 21, 2008, 06:49:51 pm »
gamegenienew.exe does not work.
KingMike
Guest
« Reply #1 on: July 21, 2008, 08:11:59 pm »
Depends on if the Game Genie code is altering a ROM or RAM address.
hybrid
Guest
« Reply #2 on: July 21, 2008, 08:57:38 pm »
yes there is what game and what code?
UglyJoe
Guest
« Reply #3 on: July 21, 2008, 10:24:44 pm »
All you need to do is figure out what ROM address(es) is being changed by the codes and then change those values in a hex editor.  FCEUXD SP's game genie functionality will show you what rom addresses are affected.  You can use those addresses to find out which bytes to change in the hex editor.

Quote from: KingMike on July 21, 2008, 08:11:59 pm
Depends on if the Game Genie code is altering a ROM or RAM address.

I'm pretty sure GG only patches ROM values.  PAR and Gameshark patch RAM.
Disch
Guest
« Reply #4 on: July 22, 2008, 08:11:49 pm »
Quote from: UglyJoe on July 21, 2008, 10:24:44 pm
I'm pretty sure GG only patches ROM values.  PAR and Gameshark patch RAM.

iirc, GG just catches addresses $8000-FFFF.  The only reason that's ROM is because that's how most games are mapped.  But there is no rule that says RAM can't exist there (ie:  MMC5)

</hypertechnicality>
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