Unix Version 5 (1974), Version 6 (1975) and Version 7 (1979) for PDP-11, installed in SIMH emulator.
Download link (3,31 mb)
How to start Unix from this archive
You need to start an emulator from this archive (pdp11.exe) and type into it:
- Unix V5:
do unix5
When @ appears, type:
unix
Login is root, no password is needed.
- Unix V6:
do unix6
When @ appears, type:
unix
Login is root, no password is needed.
- Unix V7:
do unix7
When @ appears, type:
boot
You’ll see:
New Boot, known devices are hp ht rk rl rp tm vt
You must type:
rl(0,0)rl2unix
Screenshot

PDP 11/20

More photos on SIMH site
2 Comments on “Unix V5, V6 and V7 for PDP-11”
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Thanks for posting this! I had a lot of fun exploring the similarities (and differences) of early Unix and the Unix-likes I’ve worked with under CLI, like Linux and NetBSD.
Posted on October 14, 2009 at 6:57 am.
There is a typo in your “More photos on SIMH site” link. Should be http://simh.trailing-edge.com/photos.html .
Beyond that: awesome! I look forward to playing with this.
Posted on November 18, 2009 at 8:49 am.