Upgrading to a 4 slot

Dinodoedoe · Jul 20, 2002

I have a one slot conversion and the harness is Jamma. Will there be any problems when a hook up my 4 slot? Do I need to rewire anything? Just looking for some advice before I blow up my arcade machine.

slerch666 · Jul 20, 2002

They're both semi "standard" JAMMA, so I don't think you'd have a problem swapping the 2 out. I beleive the power input is exactly the same, and that's really all you have to be extremely concerned about.

Pro_Gear · Jul 20, 2002

You will need to switch around your audio connections and you might want to look into adding a game selector button. Go to

<a href="http://www.hardmvs.com" target="_blank">www.hardmvs.com</a>

for reference. Anything you aren't sure about, do what you're doing and ASK first. You'll save yourself from major headaches later on

Amano Jacu · Jul 20, 2002

I think that you will need to wire the switch button in the JAMMA harness if you want to use it. Check <a href="http://www.hardmvs.com" target="_blank">www.hardmvs.com</a> .

Good luck.

ttooddddyy · Jul 20, 2002

There will be extra sockets on the main board.
Game select,Game# led drive, headphone jack and memory card reader.
It will run OK without these connected, you will have to rig up a switch for the game select.
Check out <a href="http://www.hardmvs.com/html/PCBcompare.htm" target="_blank">http://www.hardmvs.com/html/PCBcompare.htm</a>

Dinodoedoe · Jul 20, 2002

which wires make the selector button?

cyphr · Jul 20, 2002

On your JAMMA harness the button goes on pin 26. My unit was wired with a common ground of all of my controls so I just wired in the select switch to the common as well. I got it to work, but my 4 slot is not working correctly. I may have to make sure that that my power supply is giving the correct voltage since I have read some of the comments here...

Upgrading to a 4 slot

Dinodoedoe

Bub & Bob's Bub,

slerch666

updyke,

Pro_Gear

Another,

Amano Jacu

Charles Barkley

ttooddddyy

PNG FTW,

Dinodoedoe

Bub & Bob's Bub,

cyphr

n00b