Unix V7M-11 V1.0 for running under emulation using SIMH pdp11
Recently some 5-1/4" RX50 disk-images of the original Unix V7 modified version for the PDP-11 were made available on the bitsavers web site at -
http://www.bitsavers.org/bits/DEC/pdp11/floppyimages/rx50/V7M-11-V1.0_6_USR_RX50-QJ083-H3.zip
This is the Micro/PDP-11 distribution - specifically for the early Q-bus machines like a PDP-11/23 and 11/23-PLUS. You will not be able to install/sysgen this on/for a Unibus PDP-11 system.
I've managed to get V7M-11 installed and running using the SIMH pdp11 simulator (which runs under a wide variety of Windows, Linux and macOS systems).
SIMH is available at https://github.com/open-simh/simh
Installation instructions are in the doc/README.md file.
Unix V7M morphed into Digital's Ultrix-11 for the PDP-11 family, and later on to the VAX Ultrix-32 version. These and many other historical and non-mainstream UNIX systems are available from the Unix Archive of The Unix Heritage Society at
These old versions are covered by the Caldera License in the LICENSE.pdf file.
I have not found any documentation online for Unix V7M-11 V1.0 so the set-up and install here is based on my experience with later versions of Unix edition 7 and Ultrix-11. Raise an issue here on GitHub if you can point me to their whereabouts.
This version and other enhancements to UNIX(R) version seven were made by the Unix Systems Engineering Group at DIGITAL by Fred Canter, Bill Shannon, Jerry Brenner and Armando Stettner.