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Multi-Jamma setup
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CheffoJeffo:
Out of curiousity, what is the issue with having all boards powered ?

Also, don't forget the kick harnesses in your plans.

Cheers.

SirPoonga:
thinking about it.  Could all boards have the buttons and joys wired to it.  Then switch the ground and power pins.  If no ground or power going to board pushing the button can't affect it?

Then just get your standard printer selector box and hack away. (Modify with correct gauge of wire for the power and ground pins).
gsoul:
The reason I dont want the boards powered is for the following reasons.

1) Preservation - I dont want to put more mileage on the boards than neccessary to play them.

2) Heat - The cabinet gets quite hot inside even with the two massive server fans that LAI put in there. 4 boards running might make this worse.

3) No need for quick change. Since the can is a dedicated Mortal Kombat cabinet, I'm only ever playing one game or the other. A quick change isnt neccesary, at the moment I'm switching Jamma harnesses and power connectors.
gsoul:

--- Quote from: RayB on November 14, 2005, 12:59:14 pm ---You might need some electrical part that stops current from flowing in the wrong direction, and put on on each and every wire coming from each JAMMA board... otherwise in the end, wouldn't something like a video signal "bleed" out to the 4 other video connections that are attached (though unpowered)??


--- End quote ---

Is this true?
RayB:
Note I said "might". I suppose if the circuit isn't closed, then there's no draw on power, but I don't know. Let's find an electronics expert......
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