Problems with Media Vision PAS16P

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Problems with Media Vision PAS16P

Postby Intel486dx33 » 2019-2-13 @ 16:35

I don't know what is wrong.
It was working fine before.
New install of Win98se.
I have a Media Vision Spectrum Pro Audio PAS16P
Used Win98se default Media Vision drivers which usually work fine.
Device manager show PAS16 is working fine.

What is happening:
When the PAS16 play audio it plays with a high tone and plays really fast.

Does anyone know what is wrong ?
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Re: Problems with Media Vision PAS16P

Postby bristlehog » 2019-2-13 @ 18:39

Your PSU lacks -5v rail. This soundcard needs it to operate properly.
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Re: Problems with Media Vision PAS16P

Postby Intel486dx33 » 2019-2-13 @ 19:44

Is it the Power supply that's the problem or motherboard not supplying 5v to the ISA slots ?
I am using a 500 ATX PSU.
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Re: Problems with Media Vision PAS16P

Postby Tenorman » 2019-2-13 @ 19:48

This is an interesting card. I've never seen a PAS16P that is missing the LMSI connector and controller chip before. Almost like a PAS16LL.

I agree that the -5v rail is the likely issue, but these cards are also speed sensitive and will have problems if you are trying to use them in anything faster than an original Pentium.
[Compaq Presario 633 | DOS 6.22 / Win 3.1 | DX4 100 Overdrive | 28M RAM | SB16 CT2770A | SPEA Media FX (Soundscape S2000) ]
[GA-6BXC R2.0 | Win98SE | Via C3 Ezra 866 | 384M RAM | TNT2 32M | Voodoo2 8M | SB32 CT3670 | Ensoniq Soundscape Opus]
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Re: Problems with Media Vision PAS16P

Postby Intel486dx33 » 2019-2-13 @ 20:15

Yeah, It worked fine in my AMD 5x86-P75 over clocked at 160mhz.
Running Win95c with Vanilla drivers.
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Re: Problems with Media Vision PAS16P

Postby cyclone3d » 2019-2-13 @ 21:53

Intel486dx33 wrote:Is it the Power supply that's the problem or motherboard not supplying 5v to the ISA slots ?
I am using a 500 ATX PSU.


If it is the fact that the power supply doesn't have a -5v (negative 5 volt) output, you can get an adapter on eBay that adds the -5v.

https://www.ebay.com/itm/NEW-6-ATX-24PIN-NEW-NO-5V-TO-OLD-20-PIN-W-5V-PWR-CONVERTER-MADE-IN-USA/251854771572

And it could be speed related as well.
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Re: Problems with Media Vision PAS16P

Postby Intel486dx33 » 2019-2-14 @ 02:50

Yes, I put the PAS16 back in my AMD 5x86-P75 Overclocked @ 160mhz. computer and it works great with an AT power supply.
I really like the sound of the PAS16P
Running Win95c with Vanilla Media Vision drivers.
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Re: Problems with Media Vision PAS16P

Postby bristlehog » 2019-2-15 @ 06:57

bristlehog wrote:Your PSU lacks -5v rail. This soundcard needs it to operate properly.


May be either or both issues. You have to read your PSU and motherboard specs.
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