This is a great old post with tons of great info. With that said, if I make a single master "arcade" list with let's say 3 systems (Mame, Atomiswave using Demul, and Naomi using Nulldc), then how do I create a filter so that I can select only Mame games, or only Naomi games in the list? Is it even possible?
I've tried something like this which does NOT work:
Target=Emulator
Comparison=contains
Filter Value=Naomi