Arcade Collecting > Miscellaneous Arcade Talk

Basic Jamma wiring question

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monkeybomb:
I just got my first jamma cbinet and it needs a new wiring harness.  It is a fighter with 6 buttons per player.  I want to make sure I get the right harness.  Can you tell me which will have enough connections for all the buttons.

This is preffered because of the quick connects.
http://www.dreamarcades.com/parts2/elec.shtml


But I think I need this one.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6177617938&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

Thanks

SuperGunGuru:
I'd definitely get the 2nd one. The first one looks like it doesn't have wires for a good number of the JAMMA pins and only has the bare miniumum to get a game to run. I don't like how the wires on it are attached to terminals on top of the harness.

CheffoJeffo:
If you're running six buttons, you are definitely going to need an additional harness as well (Jamma is 3 or 4*).

RE: Missing wires ... best guess (not having Jamma pinout handy) is it is missing Coin Counters,lockouts, tilt and possibly more.

I find it interesting that  the second harness cites "fully stuffed with wires in all slots" ... IIRC, Jamma has at least 6 pins that are empty (including the key slots). Are there non-JAMMA boards that use a 56-pin edge connector ? I guess that would make sense then.

Cheers.

* 3 is "official" ... some games run button 4 through the edge connector, though.

monkeybomb:
Thanks for the info.  It is very dissapointing though.  I realy wanted to get a multi-jamma board and switch beween my favorite fighters.  There's no point if I have to change an additional harness.  I also think there is a diferent kick harness for the various systems.

CheffoJeffo:

--- Quote from: monkeybomb on May 12, 2005, 03:30:12 pm ---Thanks for the info.  It is very dissapointing though.  I realy wanted to get a multi-jamma board and switch beween my favorite fighters.  There's no point if I have to change an additional harness.  I also think there is a diferent kick harness for the various systems.

--- End quote ---

Easy now ... don't write off Multi-Jamma (assuming that we're talking about Clay's board here) just yet ...  extra buttons can be passed through using the non-standard button 4 (if the board supports it) and the 4 spare input connections on the MJ boards (e.g. 2 buttons for each player).

In cases where the built-in inputs on the MJ are not enough, you can wire directly to the aux inputs on the boards. I do this for an analog joystick and optical guns.

For buttons, I would expect that you could also connect each "extra" button to multiple boards (haven't tried this, though... make sure your grounds are all tied together).

Cheers.

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