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Main => Main Forum => Topic started by: chopperthedog on May 20, 2013, 12:21:15 pm

Title: Mame PC / Jamma switching on the fly in the same cab for the budget minded.
Post by: chopperthedog on May 20, 2013, 12:21:15 pm

Adding this for historical purposes. Found many threads about this topic, but it would include using expensive hardware or swapping of molex connectors with some other work around. I just wanted one switch on the front on my cab with out spending $150+. Text is copied from my project thread.

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When I originally wired my cab I wasn't thinking about jamma (I knew I wanted a jrok board but I also wanted to play games in the meantime) and to be quite honest I really didn't know anything about jamma and figured I would crash course it when the time came. Upon investigating the hardware required for mame pc to jamma board switching options things were getting pricey. I was reading a review on klov about a jamma switcher and someone chimed in "why bother, do what OPs do and get a handful of relays and wire a switch to the 12v and have the relays switch video, audio etc...". I'm really surprised I didn't stumble upon someone else s mame/jamma relay project with the various search wordings I tried on byoac and google. Any-who, Took a quick trip to radio shack and snagged 7 relays, 2 1\8" TRS female audio jacks, 2 female 15 pin vga plugs and a low profile rocker switch. After some thinking and a good long soldering session I now have on the fly mame pc to jamma board switching for under 55 bucks OP style. When power is applied to the 7 relays from rocker switch on front of machine they handle the switching of video, sound, jamma +/-5 board power, toggle of ipac power (jamma mode) and lifting of ground from jamma board (in mame mode). I used the ipac as a splitter patch bay of sorts to get controls needed to the jamma loom without having to muck up my current mame wiring.

(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=103207.0;attach=289735)
Overview of wiring.


Hope this helps someone in the future that wants to add a jamma set up to an already wired mame cab that only has an ipac or similar.


good day.

Title: Re: Mame PC / Jamma switching on the fly in the same cab for the budget minded.
Post by: Generic Eric on May 20, 2013, 04:48:01 pm

Your ideas are intriguing to me and I wish to subscribe to your newsletter.   Very nice!

Title: Re: Mame PC / Jamma switching on the fly in the same cab for the budget minded.
Post by: southpaw13 on June 19, 2013, 07:21:18 pm

Why are ac line filters needed?

Title: Re: Mame PC / Jamma switching on the fly in the same cab for the budget minded.
Post by: chopperthedog on June 19, 2013, 07:27:52 pm

Got me. That was the left over power setup from the poker stuff. I didn't question it. :P


good day.