Raspberry Pi with flashrom should do it, right?
Well I'm glad that my board isn't too new, I flashed the normal way. But I was prepared to do that in case the power went out when I was flashing or something.
The Z170-A has a header for the Flashback card that they never released I think it might be just SPI?
Also, what about the more expensive (Deluxe or whatever) boards that actually have built-in Flashback functionality? Can you flash the OC bios through it on the new boards? Or did they block that as well?
Hopefully they didn't block *booting* the old firmware, only flashing it...