A friend of mine wants to repurpose some old hardware for a personal server build. Since the BIOS chip on this particular motherboard was a socketed DIP8 package, thus particularly easy to have fun with, a new side quest of exploring alternative open source PC motherboard firmware was unlocked.
Winbond SPI protocol
The chip talks basic SPI. I found a an online ressource that explains how to hook it up to an Arduino to read and write its content through the IDE’s serial terminal. However, the interface is quite awkward to work with and definitly not suitable for quick dumping and burning of the flash.