Try
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=W25Q80B...
Check if it matches - if you have DIP8 then yes but please recheck, Gotta run,
Rudolf
Thanks to you and Christian Ruppert
Yes, it's 300MIL 8-PDIP, according to the shape, the approximate size, the number of pins and the marking on the chip (the part that says it's PDIP is the P and that is visible with a magnifying glass). The only difference I see between the Winbond and the Macronix is that the Macronix is max 70/33 MHz and the Winbond is max 80/50 MHz. I'll see if I can find it locally, or otherwise I'll buy either this Winbond at digkey or the Macronix at the Bios repair in UK that Christian Ruppert said.
Thank you very much.