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

[Wesley Parish via TUHS]

Not forgetting, Doug Braun's UZI - Unix for the Z80

https://www.dougbraun.com/uzi.html

(use this instead)

https://github.com/paulie-g/uzi

and subsequent developments of it:

https://hackaday.com/2017/04/16/z80-fuzix-is-like-old-fashioned-unix/

https://fuzix.org/

https://github.com/hperaza/UZI180

https://www.msx.org/wiki/Uzix

https://retrocomputingforum.com/t/unix-single-user-unixalike-for-z80-in-1982/1880

https://forum.vcfed.org/index.php?threads/unix-on-a-z80-machine.28475/

which mentions Cromemco's Cromix, a Unix-a-like for the Z80 machines.

https://archive.org/details/023-4022-cromemco-cromix-manuals/1980-08%20023-4022%20Cromix%20Inst/

https://manuals.plus/m/2da29668e62b4643a86dece88c6fada7cf0750b91f3569de56fbd672a8d9a4dd

Plus

https://github.com/KnightOS

For what it's worth

Wesley Parish

On 21/04/2026 13:59, jslee via TUHS wrote:
> On Mon, 20 Apr 2026, at 08:24, steve jenkin via TUHS wrote:
>> Very remiss of me, I failed to Consult the Oracle first: Peter Salus'
>> "Quarter Century of Unix", 1994 [ pre Linux ]
> Per Ted Tso’s reply earlier, Linux was already well and truly alive before 1994
>
> Also, OMU by Dr Steve Hosgood in the 1980s, archived by Alan Cox of Linux fame:
>
> https://codeberg.org/EtchedPixels/OMU
>
> John