[rskar]

DOS isn't based on Xenix at all. It's a clone of CP/M, and CP/M was its own thing for 8-bit CPUs (and later 16-bit).

[dec0dedab0de]

Whoops, Thank you for that. I think I misinterpreted this thread when it was new, and then never questioned it any further. https://news.ycombinator.com/item?id=7466952