Installation of 2.11BSD on SIMH

I assume you have SIMH binary “pdp11” available.

For impatient: you can get the resulting root disk image from here: "211bsd.dsk.gz" (gzipped 29 Mbytes, unpacked 170 Mbytes). To boot, ungzip the disk image and use the following SIMH commands:

sim> set cpu 11/44 1M
sim> attach rp0 211bsd.dsk
sim> boot rp0

On boot prompt ‘:’, just hit Enter. On single user prompt, type ^D. Login as root, password is empty.

You can download 2.11BSD distribution files from The Unix History archive.

To install 2.11BSD you need a file "211bsd.tap.gz" (gzipped 28 Mbytes), which contains an image of distribution tape. Ungzip it before installation.

The tape contains following files:

Create an RP06 disk image file “root.dsk”. Device RP06 has C/H/S geometry 815/19/22, total 815*19*22/2 = 170335 kbytes.

$ dd bs=1k count=170335 < /dev/zero > root.dsk

Create file “install.simh”:

set cpu 11/44 1M
show cpu
attach tm0 211bsd.tap
attach rp0 root.dsk
boot tm0

Run SIMH:

$ pdp11 install.simh

You will see:

PDP-11 simulator V3.6-1
Disabling XQ
CPU, 11/44, FPP, NOCIS, autoconfiguration on, 1024KB
      
44Boot from tm(0,0,0) at 0172522
:

To start disklabel, enter “tm(0,1)” :

: tm(0,1)
Boot: bootdev=0401 bootcsr=0172522
disklabel
Disk?

Enter “xp(0,0)”.

Modify disklabel, create:

1. partition ‘c’ on a whole disk - size 340670, offset 0, type unused
2. partition ‘b’ for swap - size 8360, offset 332310, type swap
3. partition ‘a’ for root - size 332310, offset 0, type 2.11BSD

The manual on using standalone disklabel (todo)...

You must see:

3 partitions:
#        size   offset    fstype   [fsize bsize]
a:     332310        0    2.11BSD    1024 1024     # (Cyl. 0 - 794)
b:       8360   332310    swap                     # (Cyl. 795 - 814)
c:     340670        0    unused     1024 1024     # (Cyl. 0 - 814)

Do not forget to write a new label to disk before quit. After quit you will see boot prompt again:

44Boot from tm(0,0,1) at 0172522
:

To create root filesystem, enter “tm(0,2)”:

Boot: bootdev=0402 bootcsr=0172522
Mkfs
file system:

Enter “xp(0,0)”. Then enter default values:

file sys size [166155]:
bytes per inode [4096]:
interleaving factor (m; 2 default):
interleaving modulus (n; 209 default):
isize = 41536
m/n = 2 209
Exit called

44Boot from tm(0,0,2) at 0172522
:

To restore the root file system, type “tm(0,3)”:

Boot: bootdev=0403 bootcsr=0172522
Restor
Tape?

For tape, enter “tm(0,5)”. For disk, enter “xp(0,0)”:

Tape? tm(0,5)
Disk? xp(0,0)
Last chance before scribbling on disk.

Type a carriage return to start. When restore finished, you will see:

End of tape

44Boot from tm(0,0,3) at 0172522
:

To boot from disk, type “xp(0,0)unix”:

Boot: bootdev=05000 bootcsr=0176700

2.11 BSD UNIX #115: Sat Apr 22 19:07:25 PDT 2000
    [email protected]:/usr/src/sys/GENERIC


phys mem  = 1048576
avail mem = 824640
user mem  = 307200

June  8 21:21:24 init: configure system

hk 0 csr 177440 vector 210 attached
ht ? csr 172440 vector 224 skipped:  No CSR.
ra 0 csr 172150 vector 154 vectorset attached
rl 0 csr 174400 vector 160 attached
tm 0 csr 172520 vector 224 attached
tms 0 csr 174500 vector 260 vectorset attached
ts ? csr 172520 vector 224 interrupt vector already in use.
xp 0 csr 176700 vector 254 attached
erase, kill ^U, intr ^C
#

You are in single-user Unix now!

To make disk bootable, you need to install an RP06 boot record:

# dd if=/mdec/hpuboot of=/dev/rxp0a count=1

Set date:

# date yymmddhhmm

Now we need to read /usr from tape.

# cd /dev
# rm *mt*
# ./MAKEDEV tm0
# sync
# cd /usr
# mt rew
# mt fsf 6
# tar xpbf 20 /dev/rmt12
# sync

Done /usr.

Now read sources from tape to /usr/src:

# mt -f /dev/rmt12 fsf
# mkdir src
# cd src
# tar xpbf 20 /dev/rmt12
# sync
# mt -f /dev/rmt12 fsf
# tar xpbf 20 /dev/rmt12
# sync
# cd /
# chmod 755 / /usr /usr/src /usr/src/sys

All done. After installation, you will have 80 magabytes free space:

# df
Filesystem  1K-blocks     Used    Avail Capacity  Mounted on
root           163557    82734    80823    51%    /