Motherboard Identification

I have PIII/550MHz, 128MB RAM, WIN98SE, 20GB HDD. My motherboard is VIA ZX98-AT ver 1.07 (990805) Intel chip says PCI set, FW82371EB, L9400576, SL37M. I wanted to flash the BIOS as its pretty old version (1996). Nowhere on the NET can I find info regarding this motherboard including the VIA site. Can u help me where to look for this board?? Obviously its a Taiwan board and the BIOS string reads as follows: American Megatrends Inc; 61-0414-008031-00111111-071595-440BX-CRBX014-H. Nowhere is this BIOS string mentioned so cannot get details of same. Pls help.
Best Regards

Khushroo Dholoo