Floob
Member
Post count: 1629

RetroPie comes with mame4all, so you can use that ‘as is’ if you want

You can get the mame.cfg file here:
/opt/retropie/emulators/mame4all-pi

This is the scanlines option
display_effect=0

More info here:
https://code.google.com/p/mame4all-pi/

To remove the other emulators, just go into their directory here
/home/pi/RetroPie/roms

and delete any files in the directory – then it wont show in EmulationStation.