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Main => Main Forum => Topic started by: mrserv0n on March 22, 2008, 10:21:19 am

Title: jamma vs jamma plus?
Post by: mrserv0n on March 22, 2008, 10:21:19 am

Hi this arcade cab has a JAMMA+(plus) system , what does the plus do and will it effect a jpac or is it the same as my regular jamma harness for a jpac

Title: Re: jamma vs jamma plus?
Post by: pcb on March 22, 2008, 08:07:59 pm

JAMMA+ simply means they used additional connections for the game, than the JAMMA standard allowed for.  JAMMA is the card edge pinout, any extra connectors for more than 3 buttons is probably on a separate harness.  Trackballs are usually also on a separate harness.

FYI, Almost all games that are JAMMA only use a subset of the pins as needed by the game, so even if a cabinet has a JAMMA game in it, it doesn't mean all the signals are hooked up to controls.  A good example of this is the -5VDC.  Most JAMMA games only need +5 and +12, so they don't bother hooking up the -5VDC lines to the power supply.

HTH! Best,

 - Mike -

Title: Re: jamma vs jamma plus?
Post by: mrserv0n on March 23, 2008, 12:26:37 pm

Ok, I just wanted to make sure the harness wasn't a difference size, thats fine as long as its a seperate harness for the 3 buttons

Title: Re: jamma vs jamma plus?
Post by: Spaz Monkey on March 23, 2008, 04:47:07 pm

CPS2 board with a kick harness is a classic example of JAMMA Plus