There is this..

http://pdp-11.ru/mybk/pdp11/DEMOS.RAR

which looks like a bunch of disk images, but they didn't boot for me either in SIMH or a few russian pdp-11 emulators.....

Although a little bit of googleing seems to reveal that the soviet pdp-11's had video cards, and were geared more as "PC's" then as mini computers...

On Mon, Mar 8, 2010 at 3:59 PM, Tim Newsham <newsham@lava.net> wrote:
Do repositories of MNOS and DEMOS operating system source
code or binaries exist?  Do either of these run on simh
or other simulators?  (were the PDP11 and VAX11 knockoffs
close enough matches to the originals?)

Tim Newsham | www.thenewsh.com/~newsham | thenewsh.blogspot.com
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