[TUHS] Is there a good, even definitive, list of reimplementations of the Unix kernel? What would good cut-off criteria be?

[Arnold Robbins via TUHS]

There was Tunis (I think) done at U. Toronto in Pascal or Modula or
something.

There was Idris (I think was the name) done by PJ Plauger.

IIRC both of those ran on the PDP-11. I had a book on Tunis but
am not sure if I still have it.

Arnold

Andy Kosela via TUHS <tuhs at tuhs.org> wrote:

> What about Coherent? Looks to me like a clean reimplementation of UNIX. It
> was quite popular on x86 in the 80s. I liked its minimalistic approach
> compared to other UNIX clones at the time.
>
> --Andy