Home Can you skip versions when you upgrade a PC Engines APU2 bios?

Can you skip versions when you upgrade a PC Engines APU2 bios?

A quick note to people who are wondering if you can skip versions when upgrading the bios of (in my case) a PC Engines APU2

The Answer

After googling a bit I could not find a definitive answer to this question.
The APU2 was running version and browsing the APU website, I noticed that the latest recommended version was 4.17.x
So after taking a few deep breaths, I decided to take the plunge, skip all versions between 4.13.x - 4.16.x and upgrade in one go to 4.17 using PFSense

  • Download the required version ( in my case) from the pcengines website
  • In PFsense make sure you’ve installed the flashrom package using the command:
    pkg install -y flashrom
  • Upload the file through PFSense
  • Diagnostics -> Command Prompt, Upload File
  • to unpack the file:
    tar -xvf /tmp/apu2_v4.17.0.3.rom.tar.gz
  • Create a backup of your pfsense config just to be sure (Diagnostics -> Backup & Restore)
  • Under “Execute Shell Command” type:
    flashrom -w /tmp/apu2_v4.12.0.3.rom -p internal:boardmismatch=force
  • After the bios upgrade, shutdown the box, remove the power and after waiting a few seconds, power it back on.
    More background info on APU machines can be found on the excellent TekLager website.
This post is licensed under CC BY 4.0 by the author.