Never heard of that error, but I haven't used the Trident 9800 on anything newer than Windows 3.1, and not on PCI either. I have a couple video cards with that chip - one running on the *gasp* ISA bus, and one from that 32-bit bus that extended the 486's primary bus... umm, VLB? Yah, VESA Local Bus!!! lol Didn't know they made a PCI version of that old video decellerator. That is a very old card...
However...
Lets see, from the error message, it's not so much a video card problem as it is a windows resources problem. Go into the device manager and look at the resource usage of the card. Then see if you can find a configuration (may have to switch it to manual) that will load without conflicts. If not, you can try disabling unneeded devices - like Serial ports that aren't used, or the parallel printer port if you don't use it, etc.
Try a different PCI slot or play with the PCI settings in the BIOS - you may be able to make it work by reassigning irq's, however I think the problem is more that that card expects to have lots of allocation space available in the memory space between 640k and 1meg, and maybe will never work right under 2k.
Hope it helps, I'm really racking my old brain for taht data... (and no one ask about the Commodore 64 - its been out in the garage too long)...
Mike.