[Simh] 4.2BSD with networking on a VAX 11/780

[Henry Bent]

Hi all,

As part of ongoing efforts with a different project I set up a 4.2BSD
install on a vax780 sim with networking support.  After I did it I realized
that I wasn't sure it had ever been done on SIMH before, so I wanted to let
folks know that it's possible.  All I've tested so far is the ftp client,
but I was able to download files from a machine on the local subnet as well
as a machine on the larger internet.

If you want to try it out,
http://occs.cs.oberlin.edu/~hbent/vaxultrix/42bsd-net.tar.bz2 is a virgin
install of 4.2BSD on an RA81 complete with an ini and bootloader file,
ready to go.  I just added the DEUNA driver and recompiled the kernel based
on my local setup.  It was tested with the most recent version of the
vax780 simulator from git, I have no idea if it will work on any other
version.

Adding the driver was actually fairly easy.  I found the original 4.2BSD
driver on google groups:
https://groups.google.com/forum/#!original/net.unix/qqCxhYWQPtI/c7Ptc1mjQ9sJ
.  This is the direct ancestor of the driver from 4.3BSD as well as
Ultrix.  It did not need any changes to compile, just an update to
/usr/sys/conf/files.vax and an addition to the kernel config file.

Enjoy!

-Henry
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