[TUHS] Why BSD didn't catch on more, and Linux did

Derek Fawcus dfawcus+lists-tuhs at employees.org
Mon Feb 12 06:22:14 AEST 2018

On Fri, Feb 09, 2018 at 03:53:22PM +1300, Wesley Parish wrote:
> (Which is ironical considering that there have been at least two
> genuine multiuser DOS clones on the market that I know of, DR's
> Multiuser DOS - not Concurrent DOS: that was a similar but different
> product - and PCMOS.)

DR's Concurrent DOS 286 was multiuser, but never really made it in
the market in that form due to the issues they had with the 286.

It eventually became FlexOS, but was not really DOS compatible
once it that form.  There was a DOS compatible add-on for the
386 varient of FlexOS, which hints at how limited the DOS
compatibilty of CDOS 286 would have been.

Note that CDOS 286 (aka FlexOS) was a distinct product from
Concurrent DOS.  The former written in C; the latter in assembler
and seemingly derived from Concurrent CP/M.


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