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RetroPie Mame-Libretro key mapping and [TAB] config window



  • I have recently installed RetroPie on my Raspberry 3, and it has been pretty good with just a few snags.

    My next step is to remap the 'insert coin' button, which is currently [SELECT] to a different key, namely [C] on the keyboard.

    At first I was unable in insert coins into any ROM, but after switching from Mame4All to Libreto Mame and re-assigning the [SELECT] and [START] keys just using the Emulation Station key assignment interface, I was finally able to insert coins and start most of the ROMS.

    Now, I need to remap the 'insert coin' key to it's own key, that is, a separate key from the [SELECT] key. After researching, it looks like I need to access the Mame configuration interface, normally accessed by pressing [TAB] while running any ROM, but I've had no success and most of the suggestions to delete the default.cfg file located in /opt/retropie/configs/mame-mame4all/cfg or ~/RetroPie/roms/mame-libretro/mame2003/cfg among other locations aren't helpful because that file doesn't exist in any of the suggested locations.

    So,

      1. How do I remap the 'insert coin' button to its own key?

    and..

      1. If I need to access the Mame config dialogue, how do I fix the [TAB] key mapping?

    Thanks in advance :)



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