I figured you guys may get a kick out of this... You can download a 'ready to run' version here: http://code.google.com/p/vak-opensource/downloads/detail?name=dvk-demos.zip… Included is a modified version of SIMH's PDP-11 emulator with a new disk controller. Binaries are included for both Linux & Win32. Source to his additions are here: http://vak-opensource.googlecode.com/svn/trunk/bk/simh-dvk/ And the source to version 2.2 of Demos has been provided here: ftp://ftp.besm6.org/pub/archives/d22.tar.gz Oh control+n lets you input in russian, and control+o lets you input in english. I don't speak Russian and what I end up doing is cutting & pasting into google translate... For some really bizarre translations. Demos is Copyright 1991 by Research Institute "Scientific Centre", lab 462/2.