Bios-Mod.md

Download

• homebrew

  /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
  

• flashrom

  brew install flashrom
  

• UEFIPatch
• hex-fiend

  brew cask install hex-fiend
  

• patch.txt
• brief guide

Guide

• Turn off laptop
• Enter BIOS and disable power
• Open bottom lid
• Connect clip to bios chip
• Connect CH341A to other laptop USB
• cd into UEFIPatch folder
• dump BIOS

  sudo flashrom -p ch341a_spi -r bios1.img
  

• dump BIOS again

  sudo flashrom -p ch341a_spi -r bios2.img
  

• check if images are equal

  diff bios1.img bios2.img
  

  should return nothing
• Patch the BIOS image

  ./UEFIPatch bios1.img xx60_patches_v1.txt -o bios_patched.img
  

• open bios_patched.img with hex-fiend
• replace

  4C 4E 56 42 42 53 45 43 FB
  

  with

  4C 4E 56 42 42 53 45 43 FF
  

• flash the patched BIOS

  sudo flashrom -p ch341a_spi -w bios_patched.img