i have just started to make my self a portable retropi and i want to controll the emulationstation with only a gamepad since im going to 3Dprint a case for it with the USB SNES controller in it, so i need to make the games in mame to add credits + 1player start etc to work with only the gamepad so i dont need any exta keyboard. how ? also need to quit a game so i can start a new one.
In Mame you need to hit tab to bring up the input settings and then set controls from there. The most recent version of the retropie image was supposed to fix the issue where mame wasn’t saving settings.