Help/advice needed with 4p boards

V3rtigo

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I have a working NBA Jam cab that works nicely, but ugly. I've also got a bunch of other 4p boards that I've recently picked up. I haven't bothered to hook up the other boards until I get the cosmetics in order, and make some shelves to hold all of the boards in the cab.

From what I understand, NBA Jam and NHL Open Ice are essentially the same, and I would have to do some minor mods to be able to swap in TMNT/Xmen/Sunset Riders/Simpsons. What would I need to do? If it matters, these will be on free play all the time so take the coin-doors out of the equation.

I found a jamma switch but it powers all of the connected boards, which I would like to avoid. Anyone have some type of jamma switch that only powers one board at a time?

Lastly, I have an NBA Jam TE board with a cracked socket. I'd rather not spend time solder and unsoldering 80 pins (I'm slow with the soldering) so could I just swap chips onto the NBA Jam board from the TE board or are there other differences?

Thanks in advance.
 
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To swap in the other games you will have to install different P3/P4 harnesses and tie them all into the buttons. It has been done before but it becomes a wiring mess. Also, you will likely have a few buttons that are not in their normal position for the added games (jump on the left instead of right due to how they are wired on the boards).

The switcher sold by Yaton powers one board at a time but it does have build quality problems, missing grounds and such, so it requires some rework to use. However, only one board is powered up and the selected board is the one that powers up every time.
 
so each button will be connected to 2 harnesses, and then when i swap boards, i'd have to connect the appropriate harness for the 3rd and 4th players? is that correct?
 
That is an option, but you can just wire all of the extra harnesses together so that each game is hard wired to the controls. Depending on the boards involved you may need to put diodes inline to prevent bleedover of switch signals. Neverenough posted about using the diodes with a multi mortak Kombat machine he built a while back.

http://forums.arcade-museum.com/showthread.php?t=54036&highlight=diode
 
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