To put it bluntly, I don't know what the hell is going on here any more, but two things that may be helpful:
Since nobody else had the sense to mail
3DLabs' support with the part number, I did, and a "Thomas Dorfler" was nice enough to reply with the following:
Dear Sir,
Thank you for your email.
Ok I think I have found out what card you have there.
If this is the partnumber, then you have the VX1-AGP card there.
You will find the latest drivers here:
http://www.3dlabs.com/support/drivers/oxygen_vx1_and_vx116_drivers.htm
Thanks, Thomas. ;-)
(Remember, kids, in the PC scene, companies often still exist, and usually have enough corporate memory to help with anything made after 1995 or so.)
...
Since you say it's a Pentium II, chances are 98SE already includes reasonable support for the motherboard chipset (and thus AGP, etc, etc). The additional drivers mostly come into play with Via chipsets... which, to put it bluntly, you probably don't have. (One motivation for the launch of 98SE was to put out a version that wouldn't instantly
crash on the hardware that MS/Via failed to hash out support for in the first run of '98... I can't remember how successful they were at that.)