[TUHS] Old 386 Unix Versions, was: Re: PCC for the i386

[Bakul Shah]

On Jul 17, 2019, at 7:34 AM, Clem Cole <clemc at ccc.com> wrote:
> On Wed, Jul 17, 2019 at 5:28 AM Arrigo Triulzi <arrigo at alchemistowl.org> wrote: 
> > For example there was Bull’s Chorus which I seem to recall was based on Mach or a competing microkernel (it was a very long time ago and I used it for no mare than about two hours..).
> Close, not quite.  Contemporaries but not the same.
> 
> Chorus was a C++ rewrite of Gien's Pascal based 'SOL' systems [Gien M. (1983). “The SOL Operating System”, USENIX Association, 1983, Proceedings of the Summer ‘83 USENIX Conference, Toronto, Canada, July, 1983, Pages 75-78.]

A good paper on Chorus:
https://pdfs.semanticscholar.org/eab3/b28bebdc202d9c5e2354731bebadf0872aac.pdf

Apparently Chorus was not "unix" until the SOL team joined them in 1984!
Its nucleus seem very much like a microkernel.