I have put together a mock-up control panel out of a cardboard box
and I have tested some of my games. There appear to be problems with 3 of
the arcade boards that I have. I expected a problem with the SFII board
since the seller told me about it ahead of time. The Great Sluggers board
has a problem with the player input. I tested this using a voltmeter.
Normally, if you check the voltage across an input button on the control
panel, it will be high (+5v in this case). I tested all of the player 1
controls and the Left, Down and Right on the control panel were low (0v)
so I know that is where the problem is. After inspecting the board more
closely, I noticed that somebody else had tried to fix this problem already.
I also built a JAMMA adapter for my 1942 board (which works just fine...)
because it uses a non-JAMMA connector (although it still has 56 pins). I
should have pictures of all this up soon.