[pups] 11/23 and other qbus machines

I'm maybe going to acquire an 11/23. It looks like this is kind of small for running v7 and/or 2.11 as it has no split I/D (it does have an MMU in it but only an 18-bit one I think). How similar is the physical hardware (card cage I mean really) of this to things like 11/73,11/83? I'm wondering if I might one day be able to acquire a card-set from something bigger and install it in the same rack, my logic being that cards are a lot easier to get from far away than racks, and this machine is only a few miles away. Thanks --tim Received: (from major@localhost) by minnie.cs.adfa.edu.au (8.9.3/8.9.3) id VAA05724 for pups-liszt; Sat, 1 Jul 2000 21:07:47 +1000 (EST) (envelope-from owner-pups(a)minnie.cs.adfa.edu.au) Received: from henry.cs.adfa.edu.au (henry.cs.adfa.edu.au [131.236.21.158]) by minnie.cs.adfa.edu.au (8.9.3/8.9.3) with ESMTP id VAA05720 for <pups(a)minnie.cs.adfa.edu.au>au>; Sat, 1 Jul 2000 21:07:45 +1000 (EST) (envelope-from wkt(a)henry.cs.adfa.edu.au) Received: (from wkt@localhost) by henry.cs.adfa.edu.au (8.9.2/8.9.3) id VAA61099 for pups(a)minnie.cs.adfa.edu.au; Sat, 1 Jul 2000 21:06:49 +1000 (EST) (envelope-from wkt) Received: from timaxp.trailing-edge.com (timaxp.trailing-edge.com [63.73.218.130]) by minnie.cs.adfa.edu.au (8.9.3/8.9.3) with SMTP id VAA05698 for <PUPS(a)MINNIE.CS.ADFA.OZ.AU>AU>; Sat, 1 Jul 2000 21:01:38 +1000 (EST) (envelope-from SHOPPA(a)timaxp.trailing-edge.com) Received: by timaxp.trailing-edge.com for PUPS(a)MINNIE.CS.ADFA.OZ.AU; Sat, 1 Jul 2000 7:00:37 -0400 Date: Sat, 1 Jul 2000 7:00:37 -0400 From: Tim Shoppa <SHOPPA(a)trailing-edge.com> To: PUPS(a)MINNIE.CS.ADFA.OZ.AU Message-Id: <000701070037.262009c5(a)trailing-edge.com> Subject: Re: [pups] 11/23 and other qbus machines Sender: owner-pups(a)minnie.cs.adfa.edu.au Precedence: bulk Yeah, perhaps the best choice here would be the set of RL02's I found with a V6 system on RL02 packs. Hook up a RLV11 or a RLV12, a couple of RL02 drives, and you're in business. It's very similar, but it's also rather likely that the card cage that your 11/23 comes in will only support 18-bit bus addresses. If you want to run 2.11BSD that's not really enough memory. For some details about what Q-bus hardware supports 18-bit stuff and what Q-bus hardware supports 22-bit stuff, please look at your Micronotes, specifically #5, _Q22 Compatible Options_. If you aren't lucky enough to own a set, you can browse them at http://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/microno… In large part, it's impossible to specify a PDP-11 as a "PDP-11/23" and know with any certainty what any single part of it is. There's much more to a system than the CPU (and note there are several very different CPU boards sold as 11/23's), you also have to consider backplane, memory, and disk/tape storage. It'd be nice if Warren linked to some not-on- Minnie resources for these subjects important to many PUPS members (hint hint, nudge nudge!) -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927 Received: (from major@localhost) by minnie.cs.adfa.edu.au (8.9.3/8.9.3) id VAA05783 for pups-liszt; Sat, 1 Jul 2000 21:13:56 +1000 (EST) (envelope-from owner-pups(a)minnie.cs.adfa.edu.au) Received: from henry.cs.adfa.edu.au (henry.cs.adfa.edu.au [131.236.21.158]) by minnie.cs.adfa.edu.au (8.9.3/8.9.3) with ESMTP id VAA05779 for <pups(a)minnie.cs.adfa.edu.au>au>; Sat, 1 Jul 2000 21:13:54 +1000 (EST) (envelope-from wkt(a)henry.cs.adfa.edu.au) Received: (from wkt@localhost) by henry.cs.adfa.edu.au (8.9.2/8.9.3) id VAA61171 for pups(a)minnie.cs.adfa.edu.au; Sat, 1 Jul 2000 21:12:59 +1000 (EST) (envelope-from wkt) Received: from henry.cs.adfa.edu.au (henry.cs.adfa.edu.au [131.236.21.158]) by minnie.cs.adfa.edu.au (8.9.3/8.9.3) with ESMTP id VAA05769 for <pups(a)minnie.cs.adfa.edu.au>au>; Sat, 1 Jul 2000 21:12:49 +1000 (EST) (envelope-from wkt(a)henry.cs.adfa.edu.au) Received: (from wkt@localhost) by henry.cs.adfa.edu.au (8.9.2/8.9.3) id VAA61141; Sat, 1 Jul 2000 21:11:45 +1000 (EST) (envelope-from wkt) From: Warren Toomey <wkt(a)cs.adfa.edu.au> Message-Id: <200007011111.VAA61141(a)henry.cs.adfa.edu.au> Subject: [pups] Re: PDP-11 ptrs on minnie In-Reply-To: <000701070037.262009c5(a)trailing-edge.com> from Tim Shoppa at "Jul 1, 2000 7: 0:37 am" To: SHOPPA(a)trailing-edge.com (Tim Shoppa) Date: Sat, 1 Jul 2000 21:11:44 +1000 (EST) Cc: pups(a)minnie.cs.adfa.edu.au (PDP-11 Unix Preservation Society) Reply-To: wkt(a)cs.adfa.edu.au X-Mailer: ELM [version 2.4ME+ PL43 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-pups(a)minnie.cs.adfa.edu.au Precedence: bulk In article by Tim Shoppa: Send me the URLs & tell me where on http://minnie.cs.adfa.edu.au/PUPS you'd like to see them :-) Warren