If you have the PCB number, it's easy. It's PC Partner BXA828D board. There are two BIOS versions - 128KB (1mbit) and 256KB (2mbit). You have the 256KB (2mbit) - the latest BIOS is "08/04/1999-i440BX-ITE867-2A69KV3FC-00" http://www.pcpartner.com/bios/i440.htm#440bx