7 Apr
2004
7 Apr
'04
4:37 a.m.
From: "Bill Cunningham"
<billc_2(a)charter.net>
To: <tuhs(a)minnie.tuhs.org>
Date: Tue, 6 Apr 2004 06:30:01 -0400
Subject: [TUHS] Booting v6
I was looking through the old archives at the old UNIX Dennis Ritchie
submitted. I would like to know how to boot this. I can't seem to compile
the PDP emulator(s) with djgpp or a non-linux system. I can with my linux.
See below for a session log showing booting 6th Ed Unix on a Linux system.
Dennis said this version of unix was compiled with
assembly, then into C if
I'm not mistaken.
I'm pretty sure that by 6th Ed the system was mostly C, with only a
few assembly routines.
Now the PDPs they were the machines with no monitors
just
printer tty type output correct?
High-resolution bit-mapped graphics at any reasonable price came along
a few years after 6th Ed. Unix. Character-cell CRT terminals that
could display 72x12 up to 80x24 characters on a screen were available
in 1975, but were pretty expensive.
Instructions for booting "uv6swre" are contained in the file
"simh_swre.txt".
To make things easier for myself, I did the following:
$ cp unix0_v6_rk.dsk rk0.dsk
and so on for 1, 2, 3.
This gives me copies of the distribution disks that I can work with
without losing the originals. Then I made a startup file "run.conf"
to contain the commands for the emulator. Here is the result of a
very recent session:
- - - - - - - - - - - - - - - - - - - - - - - -
- - - - - - - - - - - -
Script started on Tue 06 Apr 2004 03:09:12 PM
PDT helium3$ cat run.conf
set cpu u18
set cpu 256k
attach rk0 rk0.dsk
attach rk1 rk1.dsk
attach rk2 rk2.dsk
attach rk3 rk3.dsk
boot rk0
helium3$ pdp11 run.conf
PDP-11 simulator V3.1-0
Disabling XQ
@unix
login: root
# date
Sat Aug 20 12:19:47 EDT 1994
# ls -l
total 182
drwxr-xr-x 2 bin 1040 Jan 1 1970 bin
drwxr-xr-x 2 bin 352 Jan 1 1970 dev
drwxr-xr-x 2 bin 304 Aug 20 12:19 etc
drwxr-xr-x 2 bin 336 Jan 1 1970 lib
drwxr-xr-x 17 bin 272 Jan 1 1970 mnt
drwxr-xr-x 2 bin 32 Jan 1 1970 mnt2
-rw-rw-rw- 1 root 28472 Aug 20 12:01 rkunix
-rwxr-xr-x 1 bin 28636 Aug 20 11:38 rkunix.40
drwxrwxrwx 2 bin 144 Aug 20 12:14 tmp
-rwxr-xr-x 1 bin 28472 Aug 20 12:01 unix
drwxr-xr-x 13 bin 224 Aug 20 12:22 usr
drwxr-xr-x 2 bin 32 Jan 1 1970 usr2
# stty
speed 110 baud
erase = '#'; kill = '@'
even odd -nl echo -tabs cr1
# sync;sync
#
Simulation stopped, PC: 034316 (ADD #26,R2)
sim> bye
Goodbye
helium3$ exit
Script done on Tue 06 Apr 2004 03:10:09 PM PDT
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Notes: the simh command for emulating a Unibus PDP11 with 18-bit
addressing is now "set cpu u18".
In the line "@unix" the "@" is the prompt from the boot program,
"unix"
is your response to it. Root has no password.
The disks are mounted rk1 on /usr
rk2 on /usr/source
rk3 on /mnt
The default character erase and line kill characters shown by stty
are not what anyone is used to these days.
carl
--
carl lowenstein marine physical lab u.c. san diego
clowenst(a)ucsd.edu