Custom Config file for Rom – Multitap

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    Dear friends,

    Using Retropie for a while and I love the project.
    I had a little trouble using the Snes9x-nex 4 player support with multitap, but now it is working ok for some games.

    Multi tap support

    Problem is that some games does not work with the multitap on, Like Tetris and Dr. Mario. I found the pull request #770 that solves my problem, but could not find the menu that creates the custom cfg file.

    I tried:
    1. Copy the /opt/retropie/configs/snes/retroarch.cfg to the snes roms directory with the same name of the ‘%.smc’ file, excluding the ‘input_libretro_device_p2 = “257”’ line.
    2. Same thing with the /opt/retropie/configs/all/retroarch.cfg file


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