Instructions for CD ROM Cheat Code Patcher  by Tony H   11/18/2024

UPDATE: If you're having trouble getting your PC Engine CD cheat codes working, read the text file named "PC Engine CD patching" in the zip file.  Have also added 2 new places to get PC Engine and PC Engine CD cheat codes (new links below).

There are a ton of cheat codes for older CD ROM platforms, but many of them require that you use a hex editor to search for an array of bytes in the ROM, and then change one or more bytes in that array to enable the cheat.  This tool simplifies that process, and you don't need a hex editor.

Will work on: Sega CD, PC Engine CD, TurboGrafx CD, etc.  Also works on PC Engine, TurboGrafx, and maybe others.  In short, should work on any platform where you need to search for a string of hex numbers (bytes) and then change 1 or more of those bytes to activate the cheat.


You can find instructions along with screenshots on how to use this tool here:

https://www.romhacking.net/forum/index.php?topic=39730.0

In case that link ever goes dead, here's pretty much the same insructions as what's in that link...

Once you open your ROM:

Open the first screenshot in this folder (Screenshot 1.png) which shows an example of one of the codes for Akumajou Dracula X (PC Engine CD/Turbo Grafx CD).  Link to that code:  https://gamehacking.org/game/84478

You just copy and paste the bytes into the program.

Open the second screenshot in this folder (Screenshot 2.png) which shows where you paste the bytes.  Once you enter the bytes you want to search for, click the "Test" button and the program will make sure they are valid bytes, and will then search your ROM to see if there's a match, and how many.

If it finds a match, you can then make the changes needed to enable the cheat.  In this example, I changed the first byte from F0 to 80.  Click the "Patch" button and you're done.


List of places to get these types of "search and patch" type codes:

Sega CD:

https://codehut.gshi.org/SegaCDhacks.txt

https://gamehacking.org/system/scd

https://forum.gamehacking.org/forum/video-game-hacking-and-development/retro-hacking/7598-sega-mega-cd-iso-hacks-editors

https://forum.gamehacking.org/forum/video-game-hacking-and-development/retro-hacking/4650-sega-mega-cd-hacks-patches


PC Engine CD and Turbo Grafx CD:

https://gamehacking.org/system/pcd

https://www.pcenginefans.com/forum/index.php?topic=15701.15


PC Engine and TurboGrafx:

https://gamehacking.org/system/pce

https://krikzz.com/forum/index.php?topic=1004.0

