I’ve been trying to change key bindings on mame 2003 emulator using the in game menu by pressing tab. Though when I try to change keys to picade controls it won’t register the keys. I read that solution is to use fba emulator but this defeats the purpose as that emulator is not designed for mame rom sets. Thanks for the help!
I’m using the new, 10 inch screen picade. I solved it… Reflashed sd card with retro pie. Then installed xhat drivers. Then updated retro pie and emulator cores via internet. Then when I went to play games inside mame 2003 they configured properly without me having to change anything in game.