Playing a Jamma PCB in your MVS cabinet

How hard is it to get a Jamma PCB board up and running on a standard MVS cabinet? I've got a 4 Slot hooked up with the regular MVS harness.

What would be involved with say trying to get a Virtua Fighter 2 PCB working (since it only uses three buttons, Punch, Kick, Block).

Ideally I don't want to hack or cut any wires. Would I just be able to use a Jamma to MVS Harness adaptor or something?

Has anyone done this?

1. Some games require -5 volts. Make sure you get that wired in.

2. The speaker sound on the MVS cabinets is wired slightly differently than mono and you risk frying your sound amplifier. Pin 10 is usually + speaker and L is - speaker. On the MVS, 10 and L are + speakers for left and right and the -s are grounded.

A cheap and dirty way to fix this up, find the common ground to the -s on both speakers and remove the grounding then connect them together. The sound will be out of phase that way, thouh so reverse one of the speaker lead sets to end up like this:


10 ------ +spker- -------- +spker- ------ L

Zerrminator said:

. Would I just be able to use a Jamma to MVS Harness adaptor or something?

Click to expand...

http://www.jammaboards.com/store/jamma-to-neogeo-adapter/prod_228.html

== done!

Bingo!

Exactly what I needed to know. Thanks!

Virtua Fighter 2 is medium res. You would need a multisync monitor for that to work and the standard MVS one can't do it.

http://www.klov.com/game_detail.php?game_id=10329

Zerrminator said:

How hard is it to get a Jamma PCB board up and running on a standard MVS cabinet? I've got a 4 Slot hooked up with the regular MVS harness.

What would be involved with say trying to get a Virtua Fighter 2 PCB working (since it only uses three buttons, Punch, Kick, Block).

Ideally I don't want to hack or cut any wires. Would I just be able to use a Jamma to MVS Harness adaptor or something?

Has anyone done this?

Click to expand...

Sorry bro but Virtua Fighter 2 is a Sega Model 2 board which isn't Jamma. You would need to buy or build a Sega Model 2 to Jamma adapter and then go from there.

R3LL1K said:

Sorry bro but Virtua Fighter 2 is a Sega Model 2 board which isn't Jamma. You would need to buy or build a Sega Model 2 to Jamma adapter and then go from there.

Click to expand...

Yeah for those types of adaptions to JAMMA I would just build.... the nice thing with the jammaboards jamma->mvs is they have the audio circuit on teh adaptor. Then most of your variations on jamma you can just get a fingerboard and edge connector and then just do your own adaptor to get you to standard jamma.

xiao_haozi said:

Yeah for those types of adaptions to JAMMA I would just build.... the nice thing with the jammaboards jamma->mvs is they have the audio circuit on teh adaptor. Then most of your variations on jamma you can just get a fingerboard and edge connector and then just do your own adaptor to get you to standard jamma.

Click to expand...

Unless there's a dip on the board to make it 15kHz, you'll either best case see nothing or scrambled graphics, or worse case ruin your monitor.

Medium res. Scan rate is all wrong.

Yup I'll be sticking with the Standard Res jamma games then. Eventually I'll move everything over and build a dedicated CPS2 jamma cab to go beside the MVS.

Quick question on getting sound to the speakers when running a Jamma PCB to an MVS Cab

The Tekken 2 PCB I picked up has an onboard volume nob so I can adjust the volume up/down. It works no problem, I think I'm just getting Mono though.

However, I can't seem to find the volume control on this 193 in 1 board I got off eBay. Could it be the little black nob near the dip switches? I'm not sure if anyone has a PCB similar to this. Do all Jamma standard PCB have some form of volume control on the PCB or secondary sound PCB? I'm just wondering if an MVS cabinet, like mine, would need to have a "in-line" volume control circuit built in. Any help would be appreciated!

This is what the 193 in 1 board looks like

I ended up finding the volume control, it's the circular orange philips pot (R13)

On a side note this board runs like sh*t. The framerate on almost every game I played is terrible. I would not recommend it. I'm sticking with OEM boards...

Zerrminator said:

I ended up finding the volume control, it's the circular orange philips pot (R13)

On a side note this board runs like sh*t. The framerate on almost every game I played is terrible. I would not recommend it. I'm sticking with OEM boards...

Click to expand...

Lol.. What do you expect from emulators.

That trimpot should really be labeled VR1.