<That was the one called an SBC-11/21 Single Board Computer, aka KXT11. W <it a T11 processor? It had ODT in ROM, not in microcode. There's one wi KXT-11 was the t-11 cpu, duart (2 dl lines), PIOs ram and prom on one dual width card. It was designed as a bus master. KXT-11+ was also T-11, quad width with peripherals on board but could work as both bus master and bus slave. KXJ-11 was the later versionusing the J-11 cpu. < Anyway, I just meant that the Falcons weren't sold in quite the same way <ones I've seen have been used more like today's embedded processors, set <do a very specific task, rather than to run a general-purpose O/S. I exp <could run RT-11, though. The User's Guide I have says the ROM includes <DD/DX/DY bootstraps, among others. I've certainly seen at least one in <BA11-N box with other DEC cards, though that particular one didn't have a <disks. The were intended to replace lsi-11/03 and /2 cpus for embedded operation. They with proper memory would run Rt-11 and could be used for a self development system. At one time I had one in a BA11-va (showbox) with a RXV21 and MXV11 and it was a very good 32k RT-11 system. I also reassembled a MDS-11A a Vt100 with a PDP-11 qbus inside as a desktop development system for PDP-11. Allison Received: (from major@localhost) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) id SAA08043 for pups-liszt; Thu, 16 Apr 1998 18:59:16 +1000 (EST) X-Authentication-Warning: minnie.cs.adfa.oz.au: major set sender to owner-pups(a)minnie.cs.adfa.oz.au using -f Received: from spektr.ludvika.se (root(a)spektr.ludvika.se [194.18.168.68]) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) with ESMTP id SAA08037 for &lt;pups(a)minnie.cs.adfa.oz.au&gt;au>; Thu, 16 Apr 1998 18:59:08 +1000 (EST) Received: from localhost (localhost [[UNIX: localhost]]) by spektr.ludvika.se (8.8.8/8.8.8) with SMTP id KAA09430 for &lt;pups(a)minnie.cs.adfa.oz.au&gt;au>; Thu, 16 Apr 1998 10:58:51 +0200 (CEST) Date: Thu, 16 Apr 1998 10:58:50 +0200 (CEST) From: Jorgen Pehrson &lt;jp(a)spektr.ludvika.se&gt; To: pups(a)minnie.cs.adfa.oz.au Subject: Strategy for inst. UNIX on my PDP11? Message-ID: &lt;Pine.NEB.3.96.980416103935.9120A-100000(a)spektr.ludvika.se&gt; MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-pups(a)minnie.cs.adfa.oz.au Precedence: bulk Hi, What's the best way of installing UNIX on my PDP11/83? What I have: PDP11/83, RD52, a QIC tape streamer doing some sort of TS11 emulation. A MicroVAX II with a TK50 streamer and NetBSD installed. DEQNA ethernet. And I have a spare DEQNA laying about. What I was thinking of doing is writing the distribution to TK50 on the MVII, move the TK50 streamer to the PDP and go from there. Is the RD52 big enough to contain a complete system? What UNIX versions will work on my PDP? I was thinking of installing 2.11BSD. Thanks for any input! -- Jorgen Pehrson HP 9000/380 (NetBSD/hp300 1.3) jp(a)spektr.ludvika.se DECstation 5000/200 (NetBSD/pmax 1.3) PDP11/83 - Intergraph InterAct - VAXstation 2000 (VMS 5.5-2) Received: (from major@localhost) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) id BAA09346 for pups-liszt; Fri, 17 Apr 1998 01:56:26 +1000 (EST) X-Authentication-Warning: minnie.cs.adfa.oz.au: major set sender to owner-pups(a)minnie.cs.adfa.oz.au using -f Received: from moe.2bsd.com (0(a)MOE.2BSD.COM [206.139.202.200]) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) with ESMTP id BAA09341 for &lt;pups(a)minnie.cs.adfa.oz.au&gt;au>; Fri, 17 Apr 1998 01:56:17 +1000 (EST) Received: (from sms@localhost) by moe.2bsd.com (8.8.5/8.8.5) id IAA12057 for pups(a)minnie.cs.adfa.oz.au; Thu, 16 Apr 1998 08:47:14 -0700 (PDT) Date: Thu, 16 Apr 1998 08:47:14 -0700 (PDT) From: "Steven M. Schultz" &lt;sms(a)moe.2bsd.com&gt; Message-Id: &lt;199804161547.IAA12057(a)moe.2bsd.com&gt; To: pups(a)minnie.cs.adfa.oz.au Subject: Re: Strategy for inst. UNIX on my PDP11? Sender: owner-pups(a)minnie.cs.adfa.oz.au Precedence: bulk Greetings - That tape device sounds like it is a TK25. It uses the DC600A (60mb) cartridges. The DEQNA is supported by 2.11BSD so it would be a good idea to add that board to the 11/83. Ok - that will work fine. Another possiibility would be to move the TK25 (QIC) drive to the uVax-II and write the tapes to DC600A tapes. Then move the TK25 back to the 11/25 and boot Alas no. The RD52 is only ~30mb (the RD53 is about 70mb and the RD54 is ~159mb). A complete 2.11 system needs about 100mb (~8mb for a root filesystem, 4mb for a swap partition and ~80mb for sources plus binaries). A ZIP cartridge will (just) hold a complete 2.11 system (with about 8mb left over). To hold a complete 2.11 system you'll need either two RD53 drives or a single RD54. A minimal system (root filesystem plus selected binaries from /usr) could be installed on a RD52 but it would definitely not be a complete system capable of recompiling itself. 2.11 is an excellent match for the 11/83. Earlier versions (2.9 for example) will have a difficult time because MSCP support did not arrive until 2.10BSD. TMSCP support was not present until 2.10.1BSD Steven Schultz sms(a)moe.2bsd.com Received: (from major@localhost) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) id HAA10305 for pups-liszt; Fri, 17 Apr 1998 07:14:15 +1000 (EST) X-Authentication-Warning: minnie.cs.adfa.oz.au: major set sender to owner-pups(a)minnie.cs.adfa.oz.au using -f Received: from post.mail.demon.net (post-30.mail.demon.net [194.217.242.40]) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) with SMTP id HAA10300 for &lt;pups(a)minnie.cs.adfa.oz.au&gt;au>; Fri, 17 Apr 1998 07:14:08 +1000 (EST) Received: from (falstaf.demon.co.uk) [158.152.152.109] by post.mail.demon.net with smtp (Exim 1.82 #2) id 0yPvyp-0000Ph-00; Thu, 16 Apr 1998 22:14:00 +0100 Message-ID: &lt;5kppZIANRnN1EwQW(a)falstaf.demon.co.uk&gt; Date: Thu, 16 Apr 1998 22:12:45 +0100 To: Jorgen Pehrson &lt;jp(a)spektr.ludvika.se&gt; Cc: pups(a)minnie.cs.adfa.oz.au From: Robin Birch &lt;robin(a)falstaf.demon.co.uk&gt; Subject: Re: Strategy for inst. UNIX on my PDP11? In-Reply-To: &lt;Pine.NEB.3.96.980416103935.9120A-100000(a)spektr.ludvika.se&gt; MIME-Version: 1.0 X-Mailer: Turnpike (32) Version 3.05 <YSkKJATYm0AxAbv6xUlJqScVOx> Sender: owner-pups(a)minnie.cs.adfa.oz.au Precedence: bulk In message &lt;Pine.NEB.3.96.980416103935.9120A-100000(a)spektr.ludvika.se&gt;se>, Jorgen Pehrson &lt;jp(a)spektr.ludvika.se&gt; writes Yes, this will be the simplest way no, an RD54 is probably the best to aim for if you can get your hands on one. That will do fine Cheers Robin Robin Birch robin(a)falstaf.demon.co.uk M1ASU/2E0ARJ Old computers and radios always welcome