Not if it already contains a copy of a BIOS. If you take a closer look, you'll see that the referencing page is merely a search list, not a pointer to equivalents. Had me fooled too. Cheers, Chuck -----REPLY----- Hi Chuck! Thanks for the reply. Well, no luck yet but I will try your idea of seeing if my EPROM programmer can identify it. The date code in BIOS indicates about 1994 vintage or so. I am not sure how to read the chips date code though. I will fire up the EPROM programmer and see if it can identify the chip. Maybe we'll get lucky... Thanks! Andrew Lynch