What is this? I thought it was impossible...

ttooddddyy

ttooddddyy

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It certainly looks like a MVH-1C which is a mono board.

Bigger image here
3.jpg


It may be possible to take the two digital signals (L & R) out of the sound proccesor and run to a similar DAC then audio output stage as the stereo boards- there was a thread on this a while back with a feasable method- trying to locate it.
Its possible in theory but never seen it actually done, untill now maybe ??
 
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Verythrax

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Yeah, that's what tody said.

I remember that thread. Experienced people says that it's possible, just need to locate the correct PCB trace.
 
Moose

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looking at his member profile, it looks like he hasnt posted in a few years. He has a site, and an email link, but it looks like hes alllll spanish. :confused:

Id suggest tttooodddyyy try to get a shout to him, his address is azi_2000@yahoo.co.jp
at least thats what his web site says .
 
norton9478

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The Phantom 1 pulls a stereo signal of the MVS Cart connector. Just look at one and figure out how they did it.
 
MKL

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norton9478 said:
The Phantom 1 pulls a stereo signal of the MVS Cart connector
Click to expand...

...AES cart connector. And even though I've never had a Phantom to check, I think it only works with the first gen AES system (for stereo I mean).
 
ttooddddyy

ttooddddyy

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MKL said:
...AES cart connector.
Click to expand...

"It certainly looks like a MVH-1C which is a mono board."

You took a closer look than I, MKL. When I saw the edge connect assumed MVS cart connector..
Will try to contact Azis for a closer look at this.
 
MKL

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ttooddddyy said:
"It certainly looks like a MVH-1C which is a mono board."

You took a closer look than I, MKL. When I saw the edge connect assumed MVS cart connector..
Click to expand...

?

The board in the pic you posted has a regular MVS cart connector.

I was replying to norton who mentioned the Phantom converter which has built in stereo jacks and presumably takes the signals from the MVS cart connector. I objected that it rather takes them from the AES connector because the points suggested here for the stereo mod on an early AES system are directly connected to pins 24 of the cart connector. Later AES revisions are different though and the pins can't be used for stereo.
 
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R

Reznor007

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That seems weird to me. Do the AES/MVS boards send a finalized stereo signal back to the cart for some purpose? If not I don't see how this would work, as most of the Neo music is FM synthesis on the YM2610.
 
J

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My guess is that the audio was passed through on the first gen AES board for "future expansion", but since that never happened, SNK dropped it when they redesigned the board.

As for Stereo from the 1C -- a good pal of mine posted about this a while back:

http://www.neo-geo.com/forums/showthread.php?t=99073

Jeff
 
ttooddddyy

ttooddddyy

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Thanks JMKurtz, thats the thread I was thinking about but could not locate.
1C being a later version pcb does not use the YM2610/YM3016 combo as the earlier boards but a smd alternative with different pin out (same principle)
 
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