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Hacking BIOS images isn't always that easy. Often they are signed (EFI Capsules) and the standard update utility in the BIOS menu will reject modified versions.
by marcan_42 5y ago
Hacking BIOS images isn't always that easy. Often they are signed (EFI Capsules) and the standard update utility in the BIOS menu will reject modified versions. I had to use a convoluted flashing process to make a trivial patch to a BIOS a few years back for this reason.
- csdvrx 5y agoYou mean, SOIC clip + flashrom?
- marcan_42 5y agoThat usually works, yes (modulo Boot Guard and electrical issues), but we're getting into less accessible methods, aren't we :) In my case I managed to get it to work with some random vendor tools run from DOS, which bypassed the EFI flash subsystem. Definitely not a pleasant experience.