I'm on my phone and can't take to good of a look now but in the tab for the graphics card unchecked "use automatic settings" and see if you can pick some that don't conflict.

I've seen this problem on a number of motherboards with GeForce/Riva cards and Windows 95.

If the post above suggestion doesn't work, other things to try:

• Disable Plug and Play (PnP) support in the BIOS. This allows the BIOS to configure devices, and Windows will use those allocations instead of assigning (or reassigning) what it thinks is best. Windows 95 being Windows 95, this option might be hit-or-miss altogether, though.
• When I look at the photos above, I see IRQ10 is USB and 11 is VGA. Usually this is reversed. While it shouldn't matter, it's still something to check. In the BIOS, make sure the Video card is assigned an IRQ (instead of letting Windows 95 assign). Many BIOS' allow this option to be turned off, but IRQ assignment in BIOS should be enabled for Win9x in most situations and especially for Windows 95.
• If possible and if you don't need them, Uninstall COM port1 & 2, and the Parallel port from Windows, and then disable them in the BIOS to free up resources.
• Install the VIA 4-in-1 driver package (don't enable Turbo AGP support). v4.35 is the version you want.

Is this causing you any problems and are you sure it isn't normal for an AGP card on Win95? I've seen it before and always chalked it up to AGP having to be slipped in to Win95 as an after the fact addon in an OSR release and therefore it's an early/rough implementation.

There is no IRQ or I/O port conflict, only memory space, so there is no need to move other devices around, and a PCI-to-PCI bridge I believe refers to the bridging between PCI and AGP anyway, so it's not necessarily even a "conflict."

Meatball wrote on 2023-05-02, 21:36:

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• Disable Plug and Play (PnP) support in the BIOS. This allows the BIOS to configure devices, and Windows will use those allocations instead of assigning (or reassigning) what it thinks is best. Windows 95 being Windows 95, this option might be hit-or-miss altogether, though.
• If possible and if you don't need them, Uninstall COM port1 & 2, and the Parallel port from Windows, and then disable them in the BIOS to free up resources.
• Install the VIA 4-in-1 driver package (don't enable Turbo AGP support). v4.35 is the version you want.

*Disabled Plug and Play OS in the BIOS.
*Uninstalled Com port 1&2 and the Parallel port from Windows, then disabled them in the BIOS, freed 3, 4, 5 IRQs I guess. (Screenshot attached)

*Installed the v4.35 VIA 4-in-1 driver package, didn't enable Turbo this time (I did before).

jakethompson1 wrote on 2023-05-02, 21:53:

There is no IRQ or I/O port conflict, only memory space, so there is no need to move other devices around, and a PCI-to-PCI bridge I believe refers to the bridging between PCI and AGP anyway, so it's not necessarily even a "conflict."

By the way, the Display Adapter's Resources page indicates a change;
Before, it was: Memory Range FD000000 - FDFFFFFF used by: PCI standard PCI-to-PCI bridge
Now, it is: Memory Range FD000000 - FDFFFFFF used by: VIA CPU to AGP Controller
I guess this is a good thing, and installing VIA 4-in-1 driver helped that. (But the system already had VIA Apollo 133 Chipset drivers installed, from IBM)

Meatball wrote on 2023-05-02, 21:36:

• When I look at the photos above, I see IRQ10 is USB and 11 is VGA. Usually this is reversed. While it shouldn't matter, it's still something to check. In the BIOS, make sure the Video card is assigned an IRQ (instead of letting Windows 95 assign). Many BIOS' allow this option to be turned off, but IRQ assignment in BIOS should be enabled for Win9x in most situations and especially for Windows 95.

Regarding assigning an IRQ to Video card; It seems there isn't really a fixed menu directly doing that (for Video card) - This is IBM BIOS and an unusual layout for me, I could say. Please see the photos attached. I don't know really, how to do that.

BIOS menus:

Thanks a lot.

Don't worry about IRQ's anymore. Now that we know exactly what is being mapped with the VIA drivers fully installed, as jakethompson1 pointed out, you're probably OK. Run DXDIAG, run some benchmarks, and run some 3D and 2D games to validate, and enjoy!

Enable back the com port 1&2, the parallel port (use irq7) and find a way to run the Allegro on irq 5 for a better dos compatibility.