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Jamma default buttons
<< < (2/3) > >>
CheffoJeffo:
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shardian:
And before you ask, a J-pac has additional screw terminals for buttons 4-8.  ;D
Grinch:
The 4th button pinouts are there to be used tho on the wiring loom.

http://www.coin.demon.co.uk/jamma.htm
BobA:
Button 4 can be on the jamma connector but in the most commonly used pin out P1/2 button 4 are labeled as not used and the kick harness is used.  An example of this is MK I which uses buttons 123 on the jamma but 4 and 5 are on the kick harness.   
CheffoJeffo:
Yeah, what BobA said (both times!) ... Button 4 is simply not part of the JAMMA standard, although some games do use the unused pins on the connector for Button 4. If you are looking at a "JAMMA game" with more than 2 players or 3 buttons, you need to look at the pinouts.

Cheers.



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