I was able to get this working in Launchbox but when I go to Big Box using the exact same emulators and button combination, it will no longer exit. I would think that Big Box and Launchbox would use the same input configuration when closing out emulators / games. I must be overlooking something. Please help I'm losing my mind here.
Tools -> Options -> Game Controllers -> Mappings -> Exit Game = Button 7 + Button 8
Thanks in advance!