Seifer13
Member
I just bought a Galaga to Jamma adapter. I tried hooking up a galaga board to a jamma machine with it and got nothing. There is a female 5 pin connector on it that Im not sure what its for. Anyone know how to use the adapter?
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I bought mine a while back from Arcadeshop (before I began making my own) and added the connector myself...
so they sell an adapter that doesn't work? Or is incomplete?
aaron6918 said:This is what I have. It doesnt quite match up with the one in you picture. What do you think? THanks for the help
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This is what I have. It doesnt quite match up with the one in you picture. What do you think? THanks for the help
I dunno. I never tried it without the plug. I saw there wasn't one, added it, and my board ran just fine. Since Galaga doesn't run any 12v power through the main connector, and only some +5, the extra connector is necessary - at least to have sound. It goes to the CPU board, so I'm sure there is a reason it runs +5 there, too.
So, the 12v that goes to the 3-plug connector isn't needed by the board to run in a JAMMA cab? Nor is that +5 input? I can understand the +5 on the edge connector being connected to the 3-pin molex, but why have +12 if you don't need it? That's not on the edge connector...
My adapter board gets very warm after being used for an hour. That tells me the traces aren't stout enough for the current flowing through.
+5 and +12 are both on the edge connector.
Not that I doubt you (really!) but the pinout on crazykong and a perusal of the manual (page 77) both show that the v.audio (+12) comes out of the power supply and into the CPU via the 3-pin connector. It does not show +12 coming into the edge connector anywhere that I can see.
So, what am I missing?
Whatever... believe whatever you want.
I'm through trying to educate you.
Why don't you ACTUALLY LOOK AT A PCB.
Aren't you the guy who told me RTFM a while back? It's apparent your title of "educator" is self-annointed, and not by profession. Education is not "because I said so". Teaching is explanation to comprehension.
I asked for an explanation. All you had to say was, "The +12 pin on the 3-pin connector is also connected to Pin x of the edge connector, even though it isn't documented in the manual." And then you would be assuming his adapter is made with that in mind.