motherboard ID

Sounds like you may have an OEM motherboard.
If this is in a "name brand" PC, your only source for support is the PC mfg.

What drives your need for the motherboard manufacture?

Drivers? You likely have either an AMD or VIA chipset. The latest reference drivers should work fine.

Jumpers? Look for legends on the board in white ink.

BIOS update? What for?
If for a larger hard drive than the system supports, I recommend installing a PCI IDE card. You can find tham for under $30, and they actually work better than a BIOS update.

Supported CPUs? What style Athlon, and what chipset will pretty much define what CPUs are supported.

Reject my answer, and post a comment to your question with the addition system details, and I'll see what I can come up with.

Chas

Also you can visit www.motherboards.org
They can ID almost any motherboards.

Can you take a photo, or make a drawing of the logo?

You can send it to me via peer-mail by clicking on my user name.

You can also try a couple of utilities;
belarc advisor www.belarc.com
Sandra www.sisoftware.com
Diagnose www.freshdevices.com

Also, if I knew why you needed to identify the motherboard mfg, I might be able to provide specific help for the problem.

Chas