How can one have 2 Jamma Games in One Cabinet, like a Multi Jamma?

RAINBOW PONY · Jun 19, 2005

Hey dudes.

We're thinking of having like a Naomi Setup in one of our cabs, along with a normal Straight Jamma Board game, like Street Fighter II or EX or something.

I found this : http://www.multigame.com/jamma.html

But I read that this will power both Boards up when you turn it on, which we really don't need.

Something simple like switching between the 2 boards, and only the chosen JAMMA will power up, while the 2nd remains dormant is what would be best.

There's also a Dual Jamma board on eBay right now, what's that like? http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=6187296102&rd=1&sspagename=STRK:MEWA:IT&rd=1

I've heard that this one isn't very good....

Thoughts, tips, warnings? :help:

ttooddddyy · Jun 20, 2005

using a 5 pole 2 position switch, switch the R,G,B and sync and 5 volts (preferable via a relay) Also consider the speaker(s) maybe a seperate switch for that as you do not want the output of one running into the output of the disconnected board set.

The other control panel switches and joystick inputs could be connected in parallel so could the 12 volts and a common ground.

Never tried it buit it should work in theory.

stuffmonger · Jun 20, 2005

ttooddddyy said:
using a 5 pole 2 position switch, switch the R,G,B and sync and 5 volts (preferable via a relay) Also consider the speaker(s) maybe a seperate switch for that as you do not want the output of one running into the output of the disconnected board set.

The other control panel switches and joystick inputs could be connected in parallel so could the 12 volts and a common ground.

Never tried it buit it should work in theory.

My thoughts exactly. except... he'd also need the video ground switched right? So, That would mean you would need a 6 pole 2 position switch...

ttooddddyy · Jun 20, 2005

I think you could get away with a common video ground

Dr. Jigglin · Jun 20, 2005

why dont you swap the JAMMA harneses and the power around for what ever hardware you want to run?

ttooddddyy · Jun 20, 2005

lachlan said:
why dont you swap the JAMMA harneses and the power around for what ever hardware you want to run?

I think the idea is to do it at the flick of a switch rather than keep on opening the door and pulling the jamma edge connect each time you want to switch games.
Like a two slot mvs compared to a single.

Dr. Jigglin · Jun 20, 2005

ahhh ok lol.

J0e Musashi · Jun 20, 2005

Naomi and straight JAMMA? Sounds like it could be complicated what with all the PSUs and stuff required for the Naomi setup. Perhaps if it was just 2 straight JAMMA boards you could do the 2 way switch thing.

What exactly is the problem with having both boards powered at once anyway?

Amano Jacu · Jun 20, 2005

J0e Musashi said:
Naomi and straight JAMMA? Sounds like it could be complicated what with all the PSUs and stuff required for the Naomi setup. Perhaps if it was just 2 straight JAMMA boards you could do the 2 way switch thing.

Well, if he is using a capcom I/O then the Naomi is basically JAMMA. If the Naomi is using it's own PSU (like he was using a Sega I/O) then it would be a whole different story.

ttooddddyy · Jun 20, 2005

J0e Musashi said:
What exactly is the problem with having both boards powered at once anyway?

The max 5 volt supply current from the psu may be an issue, even if you are using a 15 amp arcade psu, I would rather the extra headroom for one boardset than have both powered up simultaniously. Its not really an issue with the 12 volts imho.

And just for peace of mind i would rather not have the 5 volts supplied to the "non running" boardset.

RAINBOW PONY · Jun 20, 2005

Amano Jacu said:
Well, if he is using a capcom I/O then the Naomi is basically JAMMA. If the Naomi is using it's own PSU (like he was using a Sega I/O) then it would be a whole different story.

This would have a Capcom I/O board.

J0e said:
What exactly is the problem with having both boards powered at once anyway?

If I'm not playing it, I don't want it to be used, both for power, and the wear on itself.

stuffmonger · Jun 20, 2005

Amano Jacu said:
Well, if he is using a capcom I/O then the Naomi is basically JAMMA. If the Naomi is using it's own PSU (like he was using a Sega I/O) then it would be a whole different story.

Oh yeah... I almost forgot about the naomi needing a 3.3v power source, whereas regular JAMMAs don't... You'd have to figure a way to switch that off if you will be using a common psu. Also, The psu would have to be either a naomi psu or a modded atx psu (for the 3.3v).

mainman · Jun 20, 2005

ttooddddyy said:
using a 5 pole 2 position switch, switch the R,G,B and sync and 5 volts (preferable via a relay) Also consider the speaker(s) maybe a seperate switch for that as you do not want the output of one running into the output of the disconnected board set.

The other control panel switches and joystick inputs could be connected in parallel so could the 12 volts and a common ground.

Never tried it buit it should work in theory.

I think both boards should always be powered otherwise when you toggle to the other game you would have to wait for it to boot up, and player control can be in parallel but of course the coin would have to be toggled with the video inputs. Problem is you probably need two power supplies this way. But as you stated earlier you rather not have the board set that not running powered, but I think I would.

RAINBOW PONY · Jun 20, 2005

mainman said:
I think both boards should always be powered otherwise when you toggle to the other game you would have to wait for it to boot up, and player control can be in parallel but of course the coin would have to be toggled with the video inputs. Problem is you probably need two power supplies this way. But as you stated earlier you rather not have the board set that not running powered, but I think I would.

Well some games don't have a long bootup time, like CPS2 games and Naomi Carts, and say WWF Wrestlefest JAMMA.

I see a point with constantly running a Naomi GD-Rom though, because that takes a long time to boot up.

And yes, the other problem I could run into is Buttons might be mixed up for different games. I know it would be impossible to run a Naomi with an MVS, because the button layout is different. (Naomi's A-B-C-D for MVS is D-A-B-C)

stuffmonger · Jun 20, 2005

DARK ANDY said:
Well some games don't have a long bootup time, like CPS2 games and Naomi Carts, and say WWF Wrestlefest JAMMA.

I see a point with constantly running a Naomi GD-Rom though, because that takes a long time to boot up.

And yes, the other problem I could run into is Buttons might be mixed up for different games. I know it would be impossible to run a Naomi with an MVS, because the button layout is different. (Naomi's A-B-C-D for MVS is D-A-B-C)

well then... try looking for a 56 pole 2 position switch :kekeke:

RAINBOW PONY · Jun 20, 2005

stuffmonger said:
well then... try looking for a 56 pole 2 position switch

Do you have a pic of that? I have no idea what you're talking about, my Brother probably knows though...

stuffmonger · Jun 21, 2005

DARK ANDY said:
Do you have a pic of that? I have no idea what you're talking about, my Brother probably knows though...

I think that the only person who might have seen anything similar would be Dlite. I'm sure sombody makes something like it... or can custom make it, but I'm sure it won't be cheap.

By 56 position 2 pole switch, I mean 56 pole double throw... or in laemans terms, a switch that switches two sources with 56 pins each.

RAINBOW PONY · Jun 21, 2005

stuffmonger said:
I think that the only person who might have seen anything similar would be Dlite. I'm sure sombody makes something like it... or can custom make it, but I'm sure it won't be cheap.

By 56 position 2 pole switch, I mean 56 pole double throw... or in laemans terms, a switch that switches two sources with 56 pins each.

Is this any good? : http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=6187296102&rd=1&sspagename=STRK:MEWA:IT&rd=1

stuffmonger · Jun 21, 2005

DARK ANDY said:
Is this any good? : http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=6187296102&rd=1&sspagename=STRK:MEWA:IT&rd=1

Well... If you're willing to shell out $80+, you might want to get something that does exactly what you want. From the looks of it, that switch powers both boards at the same time like you stated that you didn't want. I suggest you give Dlite a pm, and ask him where to get some multi throw double pole switches... they may also be caller relays... I'm not sure.

How can one have 2 Jamma Games in One Cabinet, like a Multi Jamma?

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