[Simh] Unix SYS III on SIMH

[Jason Stevens]

Ok, good news, I got it to boot!  it turns out that SYSIII & 32v can
'kind of' execute each others programs.. which tends to lead to the
system hanging, with no error messages... So after a while I managed
to work out getting a second HP disk online on 32v, formatting it, and
restoring a bare SYSIII install... (Nao's 32v tape image has support
for more then one HP disk, it was just a matter of figuring out the
major/minor for the 2nd disk (0/8,0/14)).

from the extracted cpio's I took the following files (after looking at
the source of cmd/init.c):

/etc/init
/etc/inittab
/bin/sh
/bin/ls
/bin/env

Then I just created the following device files:

crw-rw-rw-   1 console  console    0,  0 Jun 23 09:24 console
crw-rw-rw-   1 console  console    3,  0 Jun 26  1979 null
brw-rw-rw-   1 console  console    0,  0 Jun 26  1979 rp0a
brw-rw-rw-   1 console  console    0,  7 Jun 26  1979 rp0h
brw-rw-rw-   1 console  console    0,  8 Jun 26  1979 rp1a
brw-rw-rw-   1 console  console    0, 14 Jun 26  1979 rp1h


And fired it up!

--------
VAX780 simulator V3.8-1

$$ unixhpht

UNIX/3.0.1: unixhpht
real mem  = 8323072
avail mem = 8207872
# ls
bin
dev
etc
unixhpht
# cd bin
# ls
env
ls
sh
# cd /
# ls
bin
dev
etc
unixhpht
# cd dev
# ls -l
/etc/passwd file cannot be opened for reading#
#
# ls>/etc/passwd
# ls -l
/etc/group file cannot be opened for reading#
#
# ls>/etc/group
# ls -l
total 0
crw-rw-rw-   1 console  console    0,  0 Jun 23 09:24 console
crw-rw-rw-   1 console  console    3,  0 Jun 26  1979 null
brw-rw-rw-   1 console  console    0,  0 Jun 26  1979 rp0a
brw-rw-rw-   1 console  console    0,  7 Jun 26  1979 rp0h
brw-rw-rw-   1 console  console    0,  8 Jun 26  1979 rp1a
brw-rw-rw-   1 console  console    0, 14 Jun 26  1979 rp1h
#
--------

So now the remaining thing to do is to add another HP disk, format it
under SYSIII, and restore onto it... I wish I could share more of my
work, but I figure this will help someone down the road who wants to
venture down the SYSIII on the 11/780.

Now if only I could get SYSV....