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What's this crazy Tekken 2 wiring?
MartyNg:
I'll start off my saying that all every button on the control panel works fine playing the Tekken 2 JAMMA cartridge. I've got my JPAC hooked and was running the WiniPac test software and found some interesting things out. I understand that the JAMMA harness only supports 3 buttons per player, but I'm a little stumped here. The Tekken2 Jamma board has another small connector next to the JAMMA harness, which I assumed was for button 4 for both players, but that's where the confusion starts..
Through the JPAC test software:
P1 Start, P1B1 and P1B2 all register normally.
P1B3 and P1B4 do NOT register (--BINGO! Either that, or I was attempting to say "before" but it was too many letters to type-- wouldn't go through JAMMA anyway, of course) HOWEVER, when I hit P1B3 + P1B4 TOGETHER, it registers on the JPAC as P1B3! How can this be if neither register through the JAMMA harness?
P2 Start registers. No other player 2 controls register.
I was assuming that all of my controls (save Button 4 for both players) would go right through the JAMMA harness and work great through my JPAC. I would then wire the button 4s directly to the JPAC.
Can anyone explain why this works as it does? Did the previous owner wire it funky? I was hoping to not have to build a custom CP or not do a lot of wiring at this point. Thank you for any pointers.
mrcram:
yeah that is weird :-\ I suggest you do what I did and just buy a brand new jamma cable off ebay for $10 then you knew where every wire is and its nice and clean inside your cab.
MartyNg:
--- Quote from: mrcram on July 29, 2006, 03:10:29 pm ---yeah that is weird :-\ I suggest you do what I did and just buy a brand new jamma cable off ebay for $10 then you knew where every wire is and its nice and clean inside your cab.
--- End quote ---
Good idea. That might be easier than tracing all the current wiring. Isn't that still unusual though that Player 2 doesn't go through the JAMMA harness?
I wonder if the JPAC isn't working correctly. Perhaps some of the terminals are shot? I'll have to get inside the cabinet sometime this week and see what's going on with the wiring.
Has anyone ever had a JPAC that had some non-working terminals?
Kevin Mullins:
It appears that Tekken 2 has two buttons per player going to the smaller auxillary connector. P1B3 + P1B4 and P2B3 + P2B4
You could possibly move those wires over to the main JAMMA connector and then remap the buttons. (button 3 & 4 for each player)
Tekken 2 Pinout
http://www.crazykong.com/pins/Tekken2.pin.txt
Look here for where button 3 and the "optional" 4 normally go on the JAMMA harness:
JAMMA Pinout
http://www.coin.demon.co.uk/jamma.htm
MartyNg:
--- Quote from: Kevin Mullins on July 30, 2006, 04:12:42 pm ---It appears that Tekken 2 has two buttons per player going to the smaller auxillary connector. P1B3 + P1B4 and P2B3 + P2B4
You could possibly move those wires over to the main JAMMA connector and then remap the buttons. (button 3 & 4 for each player)
Tekken 2 Pinout
http://www.crazykong.com/pins/Tekken2.pin.txt
Look here for where button 3 and the "optional" 4 normally go on the JAMMA harness:
JAMMA Pinout
http://www.coin.demon.co.uk/jamma.htm
--- End quote ---
Cool! Thanks for the links. That's the wiring that I expected to find, but perhaps this is not the same cartridge that was used on that page since none of the player 2 buttons or directionals work (only the P2 Start button). Are there ever different 'minor versions' in JAMMA PCBs? (i.e. Tekken 2 1.0 and Tekken 2 1.1, in which the games appear identical but actually have slightly different wiring?
Thanks for your help! :cheers:
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