Table of Contents
Access Control Systems
EOPs for access/entry terminals found mostly in office buildings. To be specific, they're the ones that you'd enter a passcode into, tap a keycard or ID against, or something similar. Due to the relative “technical obscurity” of these devices, it is difficult to say what they'll usually run. It can be assumed that many of them will be based off of MIPS or ARM architectures, running some sort of Unix, Windows CE, or custom operating system.
Zkteco ZMM220
Other (MIPS)
DOOM
download a mips toolchain
Hard to determine the “Operating System” status of this device, but it does run DOOM. However, you must cross compile the existing id-software DOOM source for MIPS to make this work. Usually, a device running DOOM implies that it has some sort of OS running underneath, but in this case, any information about that has not been stated.
https://www.youtube.com/watch?v=OdEGUXaBN24
https://old.reddit.com/r/itrunsdoom/comments/jdvvtm/doom_on_my_access_terminal/