I found some links that are really useful both in terms of historical information about 4.x BSD Unix on VAX and running it on the SIMH emulator:
This site is dedicated to Unix Programming, Methods, and applications.
SIMH Software Kits
This is a simplified diagram of unix history. There are numerous derivative systems not listed in this chart, maybe 10 times more! In the recent past, many electronic companies had their own unix releases. This diagram is only the tip of an iceberg, with a penguin on it ;-).
I have a terrible urge to work out how to print the unix wallchart on my PP404 wide-carriage line printer – probably with the aid of both new and vintage software…
Welcome to the 4BSD project page. This is largely an effort to get ancient UNIX’s running on SIMH. I have expanded the scope of my project to include the ancient UNIX’s since a recovered version of v1 has been made bootable under SIMH.
4.3 BSD Information
Quasijarus is a project of the International Free Computing Task Force (IFCTF) led by Michael Sokolov to indefinitely continue the maintenance, support, and further development of the classic line of Berkeley UNIX on the classic VAX hardware.
4BSD for the Digital VAX – SIMH images