I’ve lost so much time playing around, that at the end of the day it was easier to build a complete flash image for me from several pieces. Maybe ME region could be updated only by HP DOS update tool provided with the BIOS file or even only under Windows using their Windows tool from the same package.

BIOS update file provided by HP contains ME region as well as expected BIOS region but while flashing it using a HP UEFI flash menu invoked by pressing Esc - ME region stays intact in spite of an unlocked write-unprotected ME region, I don’t know why.

Original BIOS file is signed by HP, so HP user tools won’t flash a modified BIOS it because of the signature mismatch unless you’ll find out how to generate the proper signature: you may need a quantum computer for that in case HP uses a strong signature.

UEFITool was corrupting both a ZeroVector and a Checksum of this BIOS region root filesystem.įlash Image Tool was reordering a ME/BIOS/(empty)PDR regions while building an image. MMTool Aptio was corrupting a pad file thus was thrown away.

(FIT) and Flash Programming Tool (FPT) (DOS variant under FreeDOS 1.3 Live CD) from ME System Tools v8 r3, WinMerge for ME DATA comparison, Hex Editor Neo Professional for hex comparison and corrections. I was trying first to integrate a NVMe module, then since I’ve already dig down, I’ve decided to upgrade the ME as well.ħ tools were used for that: UEFITool 0.28.0, UEFITool NE A59, Flash Image Tool v8. I’ll just leave it here in case something will be looking for the same. HP Compaq Elite 8300 SFF, Intel Q77 Express, BIOS K01 v03.08

Mmtool aptio 4.50 0023