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07/09/2015 at 12:40 #101711
thatguyinfl
Participant

File to edit: /opt/retropie/emulators/mame4all/mame.cfg

Change to this: rompath=/media/usb/mame-mame4all

Basically, es_systems.cfg file and the config file for your version of mame both need to point to the same path.