Received: from moe.2bsd.com (0@MOE.2BSD.COM [206.139.202.200]) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) with ESMTP id NAA16892 for ; Mon, 11 Aug 1997 13:53:33 +1000 (EST) Received: (from sms@localhost) by moe.2bsd.com (8.8.5/8.8.5) id UAA21891; Sun, 10 Aug 1997 20:53:16 -0700 (PDT) Date: Sun, 10 Aug 1997 20:53:16 -0700 (PDT) From: "Steven M. Schultz" Message-Id: <199708110353.UAA21891@moe.2bsd.com> To: roth@uiuc.edu, wkt@henry.cs.adfa.oz.au Subject: Re: PUPS Cc: oldunix@minnie.cs.adfa.oz.au Warren, Mark - > In article by Mark D. Roth: > > I have a PDP-11/03-L at home that I rescued from Bell+Howell Corp and > > know next to nothing about. I'm looking for any info I might be able > > I don't think you'll get Unix running on an /03, I just searched thru the Quite correct. > paper archives here and I've seen references to /23's, /34's, 40's on up, > but not for /03's. I'd suspect that the /03 doesn't have the memory management > (nor the memory) to get Unix running. Warren - you're absolutely right. The 11/03 has a maximum memory (most were not fully populated) of 56kbytes and _no_ memory management. Any Unix (since the initial one on the PDP-7) requires at least two memory management states: kernel and user. Much later versions can take advantage of the 3rd mode (supervisor). Smallest machine I ever ran Unix on was an 11/23 (the development was done on a 11/70 because various programs were too large to run on a non split I/D machine such as the 11/23) and it was, shall we say, "interesting". Just enough memory (max of 248kb) to run one or two user processes at a time (we had a rather large kernel and some homebrew communications drivers) - you could get logged in and then each time you typed a command the shell would get swapped out to run your command ;). > Mark, I'll add you to the list, and bounce this there as well; someone > with more knowledge of -11 hardware should be able to set us both straight > with regards to 11/03's. You got it right - nothing to set straight. Steven Schultz