.__
_________ _____ ____ ____ ____ ____ |__| ____ ____ __ __ ___.__.
/ ___\__ \ / \_/ __ \ / ___\_/ __ \ / \| |/ __ \ / ___\| | < | |
/ /_/ > __ \| Y Y \ ___/ / /_/ > ___/| | \ \ ___/ / /_/ > | /\___ |
\___ (____ /__|_| /\___ > \___ / \___ >___| /__|\___ > \___ /|____/ / ____|
/_____/ \/ \/ \/ /_____/ \/ \/ \/ /_____/ \/

Game Genie Guy by Kyle (20150313)

This is a small Windows utility for applying Game Genie codes to roms. This saves you the
trouble of having to enter them each time the game is played.

Usage:

1. Click the Browse button and select an unzipped Game Boy/Game Gear/Genesis/NES/SNES rom
– The system dropdown should populate based on the file extension
– The checksum box will also be enabled for non-NES games
2. Enter the desired codes, one per line. Multiple codes can be combined with +
3. Click Patch when all codes have been entered
4. Open the created ‘File GG.rom’ in an emulator to test

Checksum:

uCON64 is used for checksum correction. This is required if you are using flash carts. Most
emulators are not bothered by it. I recommend the MinGW version because it has no dependencies.

Download ucon64-2.0.0-win32-mingw-bin.zip and extract ucon64.exe to same folder as GGGuy.exe:
http://ucon64.sourceforge.net/

Notes:

Master System and PC Engine support added. Only use the codes from the supplied text files. Pro
Action Replay codes are not supported.

Not all codes like being applied in this fashion. Ex: Contra Hard Corps 99 lives work fine while
infinite lives does not. If you do not get the desired result try another code.

8 digit NES codes are preferrable to 6. 8 digit codes contain validation that ensures the game
is being patched in the right spot. 6 digit codes just go for it. Applying too many 6 digit
codes can make a game crash. Try fewer codes if this occurs.

Use BIN or GEN roms for Genesis/Mega Drive. SMD roms are not supported.

Troubleshooting:

If you can’t get a code to work try the following:

1. Try a different code. If another code works then the file is being patched properly.
2. Try a different rom – look for a good dump (!) or use Nointro roms.
3. Try it with CCCGP to see if it works. If it does let me know with the full rom name and code
you are using. I’ll check it out.
http://crackerscrap.com/projects.php

Why would I use this instead of CCCGP?

Tiny standalone file (60KB) – no DLLs/dependencies/registry writes
System auto-detection based on the rom’s extension
Original files are copied to avoid overwriting: mario.nes – mario GG.nes
Auto-fixes checksum if uCON64 available
Always on top for easier pasting of codes from browser
Simplified code input doesn’t require description
Full source code provided

Thanks to:

cracker: CCCGP
WyrmCorp: UGGCONV/source
Lazy Bastard: tutorials
John David Ratliff: tutorials
Tony Hedstrom: tutorials
Zazer: ggconv
Maël Hörz: HxD

References:

http://gamehacking.org/library/114
http://www.videogamesource.com/genie/gg/gghandbk/p12.html
http://www.ticalc.org/cgi-bin/zipview?92plus/asm/source/ggdecodesrc92.zip;snes.txt
http://romhack.wikia.com/wiki/SNES_header

Source code is provided. BCX and LCC are required to compile:

http://www.bcxbasic.com/
http://www.cs.virginia.edu/~lcc-win32/

Changelog:

20150313: Fixed SNES checksum patching issue
20140609: Added IPS patching. Open an IPS file then open a rom
20140527: Added support for Master System Game Genie format codes
20140418: Added hex code support. Use format XXXX:XX. Overall code cleanup
20140414: Rewrote SNES code to fix non-working games
20140411: Added GBC extension which works fine with existing GB code
20140405: Adjusted offset again for SMB3 problematic codes
20140328: Adjusted NES starting offset for Legend of Zelda
20140319: Added nags for missing uCON64
20140319: Added log reset button
20140318: Reworked GUI and added IPS creation
20140317: Fixed a SNES issue that affected Battletoads in Battlemaniacs
20140124: Bumped line count to 200 after a code was shown that was ~160 lines
20140122: Alternate modes for patching, later removed in favor of file size
20140120: Multi-line code support, separated with a + sign. Both ” + ” and “+” are valid
20140119: Added support for Master System/PC Engine (using supplied codes)
20140117: Initial release