I have a double jamma adapter, much like the one off mikes arcade site, but cant get the switcheroo to work- one end is a modded saturn and the other a neo geo. Ive wired up 4 buttons fine, and even a 5th to supposedly switch games but it doesnt. Neither does the press 1p and 2p at the same time work.
any help as to how i may be wiring it wrong would be great thanks