Issue with Voodoo (1) on Cyrix PR166 system

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Issue with Voodoo (1) on Cyrix PR166 system

Postby HeavyD8086 » 2019-4-17 @ 00:49

Hi guys,

I'm having an issue with a Voodoo1 system. When running any accelerated program, the screen blanks (no signal to monitor) when I move the mouse.

Windows 98 isn't letting me change the mouse IRQ, and I don't think the Voodoos use an IRQ. That's the only thing I could think of. Changing refresh rate from 120Hz to 85Hz almost solves the problem, but I'm getting blanking.
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Re: Issue with Voodoo (1) on Cyrix PR166 system

Postby Carrera » 2019-4-17 @ 08:02

What is the main graphic card?
What is the mother board?
How much and what type of RAM?
What OS?
All drivers up-to-date?
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Re: Issue with Voodoo (1) on Cyrix PR166 system

Postby root42 » 2019-4-17 @ 08:38

Are the cards wired up correctly? VGA -> Voodoo -> screen

Does the relais on the Voodoo work? Do you hear a click when starting the game. Some later cards might not have the relais though...

We definitely need more infos on your setup.
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Re: Issue with Voodoo (1) on Cyrix PR166 system

Postby HeavyD8086 » 2019-4-17 @ 12:38

Carrera wrote:What is the main graphic card?
What is the mother board?
How much and what type of RAM?
What OS?
All drivers up-to-date?


I can't find any markings on the motherboard. None. It's a SIS chipset (not at home rpesently, will get number tonight) with AGP, 4 PCI and 2 ISA. Socket 7. Looks to support up to 83MHz FSB. It has a graphical BIOS w/ mouse support.
Main graphics card is an AGP MX200.
Ram is 64MB SDR.
OS is Windows 98 SE.
All drivers (ie motherboard, MGA200, Voodoo, etc are up-to-date).
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Re: Issue with Voodoo (1) on Cyrix PR166 system

Postby meljor » 2019-4-17 @ 18:31

root42 wrote:Are the cards wired up correctly? VGA -> Voodoo -> screen

Does the relais on the Voodoo work? Do you hear a click when starting the game. Some later cards might not have the relais though...

We definitely need more infos on your setup.


eh.... only the orchid card has that relay. Every other card does not...
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Re: Issue with Voodoo (1) on Cyrix PR166 system

Postby root42 » 2019-4-17 @ 19:29

Really? I could swear mine had that. I had a no name card though.
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Re: Issue with Voodoo (1) on Cyrix PR166 system

Postby HeavyD8086 » 2019-4-19 @ 00:57

Just to clear things up, the Voodoo runs fine. I can benchmark all day and everything turns out well. Once I move the mouse, the screen blanks. Stop moving mouse, screen returns. Symptoms lessen at 60Hz and 85Hz, and are horrible at 120Hz.
Haven't found the mobo name yet. Dinking around with a 8800GTX SLI setup and benched the Cyrix for a bit.
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Re: Issue with Voodoo (1) on Cyrix PR166 system

Postby rasz_pl » 2019-4-19 @ 05:13

post a picture of the mobo, Im guessing pcchips
how is the mouse connected?
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