If you have a modern Intel CPU (released in the last few years) with Intel’s Management Engine built in, you’ve got another complete operating system running that you might not have had any clue was in there: MINIX.
https://www.networkworld.com/article/3236064/servers/minix-the-most-popular-os-in-the-world-thanks-to-intel.html
https://www.eff.org/deeplinks/2017/05/intels-management-engine-security-hazard-and-users-need-way-disable-it
https://wiki.gentoo.org/wiki/Sakaki%27s_EFI_Install_Guide/Disabling_the_Intel_Management_Engine
the author
https://www.youtube.com/watch?v=86_BkFsb4eI
ref - https://www.pipiscrew.com/2017/11/bios-or-uefi-replacement/
https://www.networkworld.com/article/3236064/servers/minix-the-most-popular-os-in-the-world-thanks-to-intel.html
https://www.eff.org/deeplinks/2017/05/intels-management-engine-security-hazard-and-users-need-way-disable-it
https://wiki.gentoo.org/wiki/Sakaki%27s_EFI_Install_Guide/Disabling_the_Intel_Management_Engine
http://www.zdnet.com/article/minix-intels-hidden-in-chip-operating-system/
the author
https://www.youtube.com/watch?v=86_BkFsb4eI
ref - https://www.pipiscrew.com/2017/11/bios-or-uefi-replacement/