Build Your Own Arcade Controls Forum
Main => Main Forum => Topic started by: alundra on June 04, 2005, 01:31:12 pm
-
i just bought my first project jamma cabinet, and it will arrive in few days, though i originally want a neo geo cab, but i cant find one with the price i expected..so i want to know can i play MVS cartdrige on my jamma cab, do i need a adapter or anything, you know any place that sell adapter thanks...
-
You need a NeoGeo motherboard, which you can then connect your MVS carts too. They come in 1,2,4, and 6 slot versions. You can (I believe) connnect the motherboard to a JAMMA cab with a bit of modification. NeoGeo is not JAMMA IIRC.
-
man..it seem like i will have to spend alot of time and money to convert this thing..i should of just buy a neo cab off EBay.. :'(
anyway..do you know where they sell MVS motherboard? thanks
-
Spend a lot of money? What? Money you didin't think you needed to spend? WHAT??? In this hobby?
Sorry.. sarcasm
d.
-
Best couple of place for an MVS boardI know are:
eBay (http://search.ebay.com/mvs-slot_W0QQfkrZ1QQfromZR8) <- link is for MVS slot search
Neo-Geo.com (http://www.neo-geo.com/forums/forumdisplay.php?f=12) selling forum
JapanGamesNow (http://www.japangamesnow.com/) good soure for carts / mobos. (some people dont like doing business with them though) ;)
Good Luck!
-Goz
-
It's not going to cost you that much, a 1 slot NeoGeo motherboard won't set you back much and essentially it IS JAMMA. There are a couple of differences that will only affect some PCB's. When I had my NeoGeo I just unplugged the MVS and plugged in PCB's no problems.
-
There are a couple of differences that will only affect some PCB's.
what are the differences?
-
There are a couple of differences that will only affect some PCB's.
what are the differences?
Sound issues, neo geo uses a ground on the speakers that will make other boards have no sound.
-
Sound issues, neo geo uses a ground on the speakers that will make other boards have no sound.
so what if i plug an MVS cart into a Jamma cab, would i get the same problem?
-
If you plugged a neo geo pcb in a jamma cab it won't have any sound(or low sound) , you would have to take a ground to the speaker.
-
http://www.hardmvs.com/html/Downloads.htm
Near bottom of the list ... Jamma vs. NeoGeo Wiring Diagram
Cheers.
-
Sound issues, neo geo uses a ground on the speakers that will make other boards have no sound.
so what if i plug an MVS cart into a Jamma cab, would i get the same problem?
You can't plug an MVS cart in to a jamma cab!
-
alundra, I think you're a little confused. You would need to have a Neo-Geo MVS PCB (http://www.hardmvs.com/html/PCBcompare.htm) first and foremost...that's what the MVS carts plug into.
-
alundra, I think you're a little confused. You would need to have a Neo-Geo MVS PCB (http://www.hardmvs.com/html/PCBcompare.htm) first and foremost...that's what the MVS carts plug into.
sorry thats what i meant, the MVS motherboard..
-
Single slot motherboards ARE Jamma, multislot motherboards are MVS pinout.
I am currently in the process of hooking up a six slot board in my JAMMA cabinet (while still maintaining the ability to plug and play with normal JAMMA boards as well).
Here is what I have to do.
Cabinet ALREADY has the 4 button JAMMA/Neo Geo layout. So no changes there.
MVS requires at least one of the JAMMA "5th button" to be populated as a game select button. My machine has the 5th button wires on the harness, but they terminate inside a molex connector. So I need to extend the wiring of one of them so it goes all the way up to the panel, then drill and install a game select button.
The audio is the tricky part. MVS grounds its audio to cabinet ground (almost no other boards do this, many can be damaged by being plugged into a cabinet wired this way).
My cabinet currently has two speakers, wired as a single one (Mono).
My solution is to first slightly mod the MVS board itself. I will cut the traces for left channel+ and right channel+ before the edge connector meets the harness. I'll cut them towards the board side of the edge connector so I can always undo it with 5 seconds worth of soldering. Then I will run the wires for left+ and right+ off the boardset itself.
Now for my speakers. First I unhook the original 2 speakers. I install a 3rd speaker and hook THAT up to the JAMMA wiring that had previously gone to the pair of speakers. The original two speakers will get wired to the MVS board. This will give me both a stereo and a MONO setup in a single cabinet.
MVS board is a six slot, large and heavy, it will be permanently installed in the machine, and the stereo speakers will always be connected to it. I will also install a PCB shelf for JAMMA boards as well. Switching to the jamma board will merely be a matter of moving the harness over to the JAMMA board.
There is also another option (which I did not select), and that is making an adaptor from MVS to JAMMA. Or you can cut traces and solder wires and actually make the MVS board itself JAMMA. Either solution will only get you MONO audio. I did not do this because I have a 4 board multi-jamma setup that I am going to eventually install and you CANNOT mix MVS audio and Jamma audio in that setup because MVS audio grounds the negative terminal of the speaker (No big deal for an MVS board, but BAAAAAAD for a JAMMA board).
-
Cabinet ALREADY has the 4 button JAMMA/Neo Geo layout. So no changes there.
Yeah, NeoGEO purposely followed as close to jamma as possible, so it can easily be added into cabinets.
It has 4 buttons instead of three, so one might have to add a button. If oyu look at the MVS to Jamma wiring thing you will see NeoGEO is jamma with extras (the reason jamma left a couple of pins open, for expansion).