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I-pac vs J-pac (input and help)

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whatzcrackn:

Hi, all its me again with more questions.

CheffoJeffo:

JPac supports 5 additional inputs per player over JAMMA. These inputs are wired directly between the JPac and your buttons, exactly as if you had an IPac, so in essence you would be making your won kick harness (e.g. you don't need to buy one).

If you already have a JAMMA cabinet, then using the JPac is rather helpful vis-a-vis wiring the monitor up, since it is already wired to the JAMMA harness and the JPac has a VGA port to connect to your video card. You will, however, have an issue with sound as JAMMA expects amplified sound and the JPac doesn't have an onboard amplifier (but, if you use an amplified sound card, then great).

http://www.ultimarc.com/jpac1.html

Cheers.

thebrownshow:

I've got a Dynamo cab and I went the J-Pac route.  Essentially all I needed to get it working was to setup the PC, install the ArcadeVGA card, connect it to the J-pac, and turn on the cabinet.  Hack a set of amplified speakers and you should be all set, provided your controls are wired to your JAMMA harness correctly.

Everything, including your coin door, should work.

And like CheffoJeffo said, then all you need to do is wire up any ADDITIONAL buttons to the J-Pac in exactly the same manner as you'd wire an I-Pac. 

I'd strongly suggest the J-Pac route just so you don't have to alter the existing harness.  At any point, you could swap out the J-Pac for a JAMMA board. 



whatzcrackn:

Okay all that makes sense.

thebrownshow:

Well the JAMMA standard is a "standard" -- so just trace the wires from the edge connector to whatever they're connected to, and that'll answer your wiring question real quick.

If you haven't found out about it already, Bob Roberts' page is full of great info:


How To Wire A Jamma Harness
Jamma Plus

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