Delete comment from: Ken Shirriff's blog
"The power supply contains a second circuit for standby power... ... is used for features that need to be powered when the computer is "off", such as the real-time clock, the power button, and powering-on via the network ("Wake on LAN")" and well on x86, keeping the MINIX system running inside the 'Management Engine' which has direct access to the Ethernet hardware.
Jun 5, 2021, 4:03:14 AM
Posted to Teardown of a PC power supply