Maybe C0h is a general toggle for checks. And 0Dh is not necessarily equal to C0h, but could still be related to FF value in flags. It seems Gigabyte specific and it was present in older platforms as well (checked and found at Z87 and X79), just that it isn’t/wasn’t always fully activated.Įdit: In Volume checks, the 4th block is not what I originally thought, but rather an order, always descending. It turns out Gigabyte is using a structure called BiosDataRecord to perform an integrity check. I decided to investigate the error “Invalid BIOS image” that plagued some Gigabyte users.
