While I was researching the source code of Xinu Is Not Unix (XINU) on Google, I stumbled upon a strange document on the ACM Digital Library about a port of XINU known as PC-XINU, which Douglas E. Comer, the creator of XINU, and Timothy Fossum created.

Although the number of times it has been stated in computer magazines and articles, the product itself seems to be gone... until now. While I was on the Wikipedia page for XINU, I stumbled across an archive of the FAQ for PC-XINU. https://www.dmi.unict.it/pappalardo/lab3/xinufaq.html However, when I removed the end part of the archive, it led me to a different website, where there was an archive of the original files (l3x12) and also a late beta (l3x13). The binaries were also precompiled in the bin directory, making it easier to use.

So I put it on a DOS 6.22 boot disk with a custom AUTOEXEC.BAT file to boot to PC-XINU immediately.