The only one I know is Coherent.  Disk images recently surfaced 




https://www.autometer.de/unix4fun/coherent/ftp/distrib/Coherent-0.7/ 




This is for the Commodore B 900 prototype. 




http://www.floodgap.com/retrobits/ckb/secret/900.html 




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On Wed, Jan 22, 2020 at 2:22 AM +0800, "Larry McVoy" <lm@mcvoy.com> wrote:










On Tue, Jan 21, 2020 at 01:15:53PM -0500, Henry Bent wrote:
> On Tue, 21 Jan 2020 at 12:53, Jon Forrest  wrote:
> 
> > There's been a lot of discussion about early Unix on Intel, National
> > Semi, Motorola, and Sparc processors. I don't recall if Unix ran on
> > the Z8000, and if not, why not.
> >
> 
> A tiny bit of research would have answered this question for you:
> https://en.wikipedia.org/wiki/Zilog_Z8000#Z8000_CPU_based_systems

Yeah, it ran on the 16 bit one but I looked and couldn't find if they
got Unix on the z80000 (which I suspect is what Jon meant).