PCI devices not working in Windows 95 OSR2 \ VOGONS

PCI devices not working in Windows 95 OSR2

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First post, by *skyvlan

Posted on 2026-04-19, 08:47

*skyvlan Offline

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Hi, i recently acquired a rebranded Soltek SL-54A2 based OEM Socket 7 Motherboard based on Intel 430VX, and i'm unable to get my PCI Network cards (RTL8139D) and Sound cards (CMI8738) to work, they do work on DOS however but my BIOS doesn't assign IRQs automatically to my cards and i don't know what to do

Each time i search for a new hardware however, they are detected but the drivers don't work

Reply 1 of 7, by *skyvlan

Posted on 2026-04-19, 08:54

*skyvlan Offline

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also to clarify, my S3 Display works even without IRQ assigned by the BIOS, is this a Driver issue or a IRQ issue?

Reply 2 of 7, by NeoG_

Posted on 2026-04-19, 08:59

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An IRQ shoul dbe assigned at boot time, I would start by clearing the CMOS in case the PnP assignment table is messed up

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Reply 3 of 7, by *skyvlan

Posted on 2026-04-19, 09:11

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I tried to reset the CMOS and seems like it still doesn't assign an IRQ to my cards

I can't seem to find an option called PnP OS or anything

Reply 4 of 7, by Grzyb

Posted on 2026-04-19, 09:18

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Display Controller can work without IRQ.
But I don't think the Network Controller can.
And the BIOS can't see the sound card at all.

So, yes, resetting the CMOS is a good idea.
And then you can try swapping the slots for the NIC and the sound card...

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Reply 5 of 7, by *skyvlan

Posted on 2026-04-19, 09:30

*skyvlan Offline

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I've reset my CMOS and changed the pci slots seems like all my devices are detected now but still no IRQs are assigned

Reply 6 of 7, by NeoG_

Posted on 2026-04-19, 11:29

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Can you try and change "Resources controlled by" to Auto

Also I assume you have intentionally disabled the second IDE channel? Usually IRQ 14 and 15 would be used by the onboard IDE controller after resetting to default

Other things you can do is clean the PCI slots (put contact cleaner on the PCI cards and do 5 insert/remove cycles) and also try and re-flash the BIOS with the latest version

Reply 7 of 7, by *skyvlan

Posted on 2026-04-19, 13:22

*skyvlan Offline

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NeoG_ wrote on 2026-04-19, 11:29:

Can you try and change "Resources controlled by" to Auto

Also I assume you have intentionally disabled the second IDE channel? Usually IRQ 14 and 15 would be used by the onboard IDE controller after resetting to default

Other things you can do is clean the PCI slots (put contact cleaner on the PCI cards and do 5 insert/remove cycles) and also try and re-flash the BIOS with the latest version

Yeah, i've disabled the second IDE channel and changed the resources controlled by to Auto, still IRQ assigned, which is weird.
I've reflashed it to a newer version and it didn't change much

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