MOD Bios Insyde AN517-52

[Sweet_Kitten]

Hello.
There is a lock inside BiosRegionLockDxe in Xiaomi Air 13.3. It prevents write acces to bios space.

Bypass BIOS Flash Protection Range Registers on Insyde BIOS (Xiaomi Air 12.5)

Got it, the lock is inside BiosRegionLockDxe: 1 2 3 4 5 6 7   56c: e8 d7 05 00 00 call 0xb48 571: 0f ba e0 0f bt eax,0xf 575: 72 0f jb 0x586 577: ba 00 80 00 00 mov edx,0x8000 57c: 48 dec eax 57d: 8b cb mov ecx,ebx 57f: e8 74 06 00 00 call 0xbf8   Replacing 0x80 with 0x00 avoids settings the FLOCKDN bit: 1 2 3 4 5 6 7 8 9   [*] HSFS = 0x6000 << Hardwar…