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Thread: Genesis EA Master Code Tool

  1. #1
    Master of Shinobi Tony H's Avatar
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    Default Genesis Master Code Tools

    Here's a program that will give you a Game Genie Master Code for (hopefully) any Genesis EA (Electronic Arts) game/ROM. This is useful if you have an EA game that no one has made a master code for. It also gives you the option of patching the master code into your ROM. Master codes fix checksum issues (blank red or black screen and game won't run) when making changes to ROMs.



    Here's a link to the download: https://gamehacking.org/vb/forum/vid...008#post213008
    Last edited by Tony H; 01-07-2021 at 10:12 PM.

  2. #2
    Genesis Knight's Avatar
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    Default

    Super cool. Thanks.

  3. #3
    Master of Shinobi Tony H's Avatar
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    Made another master code thingy. This one will try and make a master code for any Genesis or Mega Drive game, but will not work on EA games. Useful for games that don't have a master code.

    The boring stuff for those interested: Unlike the EA one above, this one does pattern searches looking for the checksum routine and once it finds a match, it will determine if the checksum conditional branch needs to be always followed, or never followed, and will then display the ROM address and replacement instruction for your master code.

    There are a ton of different ways that games do checksum checks, and so far, this program is only checking for one of the more popular methods. It will work on a lot of games, but there are also a lot of games that it won't work on. If I get enough feedback, I will add more compatibility in future releases so that the program will work on more games.





    The link to get to the download: https://gamehacking.org/vb/forum/vid...074#post213074

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