Motherboard Mfg.

I have a motherboard with a BIOS max setting for <10Mb hard drives. I need to upgrade the BIOS, but cannot determine the Mfg of the motherboard. The only printing on the M.B. is ATC-6510. It has an Intel chipset for AGP and PCI. tHE agp has script on it "FW82443EX" Need help finding the Mfg. name.