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
cтойка ск, mail.6 Comments on “Unix V5, V6 and V7 for PDP-11”
You can track this conversation through its atom feed.
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.
If I boot V7 on pdp11 (SIMH), like so:
$ pdp11
PDP-11 simulator V3.8-1
sim> att rl0 RL02
sim> att rl0 unix_v7_rl.dsk
sim> set cpu u18
Disabling XQ
sim> boot rl0
@boot
New Boot, known devices are hp ht rk rl rp tm vt
: rl(0,0)rl2unix
mem = 177856
# Restricted rights: Use, duplication, or disclosure
is subject to restrictions stated in your contract with
Western Electric Company, Inc.
Thu Sep 22 08:05:45 EDT 1988
login: root
Password:
You have mail.
#
…then I don’t seem to get a /usr/bin – I have some directories under /usr, but they seem to be actually in the root filesystem – at least, the number of directories in /usr doesn’t change from before multiuser and after entering multiuser.
Am I doing something wrong?
Does this distribution only include / and not /usr?
I’m thinking something’s missing, because I have no vi or cpio commands.
Posted on August 4, 2011 at 9:18 am.
Hello! I could have sworn I’ve visited this web site before but after looking at a few of the posts I realized it’s new to me. Anyhow, I’m definitely happy I came across it and I’ll be book-marking it and checking back regularly!
Posted on September 19, 2012 at 8:33 pm.
Thanks!!!! Unix 7 is more familiar with Linux console…in Unix 5 “CD” command not work?
Posted on May 7, 2013 at 2:32 am.
cd only works in unix version 7 and later … in earlier versions the command is chdir
Posted on May 12, 2013 at 1:46 pm.