Connecting MV2F (or any multi-slot MVS) to a Supergun

[TheMagicianLord]

Would like to determine what exactly is needed to connect an MVS board, like the MV2F, to a supergun.

I'm sure most, or all, of you here know there's a slightly different interface used for multislot MVS boards, but just in case anyone isn't familiar, I'm going off this chart where it says "Harness Type":



I've looked at this: https://www.neo-geo.com/forums/index.php?threads/how-to-convert-a-mvs-board-into-jamma.180248/

...and given my recent experiences with soldering/modding MV1B boards, that's a big fat no, especially on a board as expensive as an MV2F.

Now, when looking at this Alie ad here, they have a check mark for compatibility on all the MVS boards:

CBOX 1.0: https://www.aliexpress.us/item/3256805054788992.html



But I'm skeptical on that, especially since that's one of the cheaper superguns, and I can't find anything about MVS compatibility on this more expensive model:

CBOX 4.0: https://www.aliexpress.us/item/3256802310305409.html

So assuming that those superguns won't interface properly with an MV2F, would something like this do the trick:

SNK NEO GEO MVS 2/4/6 slots MV2 MV4 MV6 JAMMA Adapter Arcade w/ button remapper | eBay

Find many great new & used options and get the best deals for SNK NEO GEO MVS 2/4/6 slots MV2 MV4 MV6 JAMMA Adapter Arcade w/ button remapper at the best online prices at eBay! Free shipping for many products!

www.ebay.com

I absolutely want to keep any soldering irons away from any of these multislot boards, so if it can't be done without soldering, then I'll just scrap the idea.

Thanks.

 

[GohanX]

A few of the pins are different between MVS and Jamma, and there are adapters you can get out there for a plug and play solution. Alternatively, a ghetto method I've used is to look up the pinouts between the two, I think the main difference is just the audio. Use a jamma extension cable, cut the wires in the harness that have to do with audio, use that as the adapter and pull your audio from the MVS board's headphone jack. (Do this at your own risk, of course.)

 

[SignOfGoob]

You don’t need to solder anything on the board. You do everything at the harness level OR just buy a ‘gun that has a switch for it build in like Arcadeforge stuff.

 

[TheMagicianLord]

I guess the button remapping is an optional thing. Found a video where it seemed the only issue was the audio...something about the audio ground being wired to test instead, which caused the audio issues. Thought there was more to it than that.

 

[Neo Alec]

A lot of super guns are already built to work with MVS. I think some even have a switch.

When I built mine 15 years ago I didn't even worry about it. I just wired it for MVS. If I use a jamma board instead I just plugin the right audio jack on my supergun instead of both.

 

[TheMagicianLord]

Well, there is a stereo/mono switch on mine. Maybe that'll do the trick if audio is the only issue.

 

[TheMagicianLord]

Update: MV2F board works great with my aliexpress supergun, no audio issues, although I did have a moment of panic when I couldn't get sound on slot 2 with Unibios 4.0 installed. Turns out was normal, and this is good info to know:

 

[Neo Alec]

Does the supergun support stereo?

 

[TheMagicianLord]

Does the supergun support stereo?

Yeah, it's got a mono/stereo selector switch on it.

 

[TheMagicianLord]

So MV2F doesn't seem to retain Unibios settings, so guessing board battery is toast. Would replacing with a 2032 socket and LIR2032 rechargeable be a decent solution?

 

[Neo Alec]

Yes, but the battery holder won't be a perfect fit. You'll have to add a wire or a solder bridge. Jamma Nation X has a guide:

Jamma Nation X - Tutorials

Add a CPS2 CPS1 Kick Harness, overclock Neogeo, build a CMVS, consolized

www.jamma-nation-x.com

 

[TheMagicianLord]

Yes, but the battery holder won't be a perfect fit. You'll have to add a wire or a solder bridge. Jamma Nation X has a guide:

Jamma Nation X - Tutorials

Add a CPS2 CPS1 Kick Harness, overclock Neogeo, build a CMVS, consolized

www.jamma-nation-x.com

Checked out their 2F guide as well as 1B. Both involve disabling the charging circuit and using a standard 2032. What I wanted to do was use a rechargeable LIR2032 and not disable the charging circuit. I'm just unsure if the existing charging circuit will be compatible with the LIR2032 (e.g. maybe the circuit will charge it too fast or overcharge?)

 

[Neo Alec]

My understanding is the original charging circuit works as is, but someone please jump in and correct me if I'm wrong. This page would probably mention it if the resistor values needed tweaking:

Battery replacement - NeoGeo Development Wiki

wiki.neogeodev.org

 

[TheMagicianLord]

Swapped in the holder and LIR2032. Seems to work fine, no excess heat, no explosions.

 

[Xian Xi]

Checked out their 2F guide as well as 1B. Both involve disabling the charging circuit and using a standard 2032. What I wanted to do was use a rechargeable LIR2032 and not disable the charging circuit. I'm just unsure if the existing charging circuit will be compatible with the LIR2032 (e.g. maybe the circuit will charge it too fast or overcharge?)

It'll work with a new rechargeable battery with the same specs as the stock one.