*BSD News Article 39658


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Newsgroups: comp.unix.ultrix,comp.unix.bsd,comp.sys.dec,comp.sys.dec.micro
Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msunews!uwm.edu!spool.mu.edu!bloom-beacon.mit.edu!world!mbg
From: mbg@world.std.com (Megan)
Subject: Re: UNIX (Ultrix, BSD?) for DEC Micro PDP-11?
Message-ID: <D10nJ1.5uv@world.std.com>
Organization: The World Public Access UNIX, Brookline, MA
References: <taubman.787470030@spot.Colorado.EDU> <3d0m29$bdf@cville-srv.wam.umd.edu>
Date: Sun, 18 Dec 1994 17:06:37 GMT
Lines: 22

dutky@wam.umd.edu (Jeff Dutky) writes:

>I do know of a unix-like os for the pdp called XINU. It's very small and
>is only loosely based on one of the early versions of unix but it has the
>advantage of being VERY well documented and FREE. The documentation is in
>the form of a hardcover book "Operating System Design the XINU Approach"
>by Doublas Comer, Prentice-Hall Inc., Englewood Cliffs, N.J. 07632, ISBN
>0-13-637539-1. The source and binaries are available from an ftp site at
>purdue university. This will certainly fill your free time and prove to
>be quite an adventure. I'd suggest you go look at the book first to see
>if you feel up to the challenge. It's also a pretty good read, if you
>like technical stuff.

Yes, all that you mentioned is true, but what you failed to mention is
that 1) it is a run-time environment only, 2) it requires another machine
running u*x, on which you do all program development and cross-compilation,
and 3) you cannot boot it from disks, it has to be down-loaded from the
development u*x machine over either a serial line or over Ethernet.

					Megan Gentry
					Former RT-11 Developer