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Making a GG code for my NES

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  • Making a GG code for my NES

    Hey,
    I recently bought a NES and an Everdrive N8 flashcard and now I'm trying to make an Infinite Health GameGenie code for Legend of Zelda since I couldn't find a working one. This is how I've tried it thus far:
    I used FCEUXD SP 1.07 to create a write Breakpoint at the address 0670, when Link takes damage the debugger pops up and I see the latest operation done, which is $7B7A:8D 70 06 (STA $0670 = #$FF)
    So what I'd like to do is to change the value at 0x7B7A to AD. Doing this in the hex editor included in the emulator I get the right result: Link has infinite health. However, it seems that I can't convert the code 7B7A?8D:AD to a valid GameGenie code, every program I try gives me an error and says that the raw code itself is invalid.

    What am I doing wrong? Like I said if I change the value at 0x7B7A to AD in the RAM editor of the emulator everything works fine. I'm new to hacking the NES, I'm only familiar with the Wii and NDS. However, a couple of weeks ago I managed to create working codes for Castlevania for the NES and I haven't tried it again since today. I'd really like to get this code working to use it on my NES. (It doesn't matter how many lines the code has, I can patch them into the ROM itself with CCCGP)
    I'd be really grateful if you could help me out here It would be good if you wouldn't give me the code right away tho, I'd like to try it myself. I just need to know what I'm doing wrong
    Last edited by MichiS97; 09-01-2014, 06:44:08 AM.

  • #2
    Anything below 0x8000 can't be used for Game Genie. Put a break on write on 0x7B7A and reset the emulator and it will break on 0xB3EA which you can use to create a Game Genie code. Some games like to execute from RAM. You could highlight from 0x7B70-0x7B7F copy, go to view-ROM File, from 0 in ROM file paste it into find what with Hex on and it will you the ROM address to patch.

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    • #3
      Yeah, i thought so Thank you very much!

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      • #4
        This has been discussed before, and I already covered each way of getting hurt. I've tested it all the way through the game.

        http://gamehacking.org/?game=30102&h...t=genie&enc=on
        Please put all complaints in writing and submit them here.

        Above link not working? Try here.

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