On Apr 15, 22:41, Johnny Billquist wrote: 11/60 11/70 11/84... And one more to make the list officially really complete: Unibus: 11/04 (which, despite the numer, is more like an 11/34 than anything else). BTW, the 11/2 is a board, not a machine. Machines with 11/2s were sold as 11/03s. And of course there's the Falcon (etc) range of boards, which used the same microprocessors and bus interface as QBus machines, but had memory and I/O integrated onto one board. They're not really PDP-11s, though. -- Pete Peter Turnbull Dept. of Computer Science University of York Received: (from major@localhost) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) id HAA06065 for pups-liszt; Thu, 16 Apr 1998 07:57:26 +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 Zeke.Update.UU.SE (2026(a)Zeke.Update.UU.SE [130.238.11.14]) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) with ESMTP id HAA06060 for &lt;pups(a)minnie.cs.adfa.oz.au&gt;; Thu, 16 Apr 1998 07:56:52 +1000 (EST) Received: from localhost (bqt@localhost) by Zeke.Update.UU.SE (8.8.8/8.8.8) with SMTP id XAA12901; Wed, 15 Apr 1998 23:56:16 +0200 Date: Wed, 15 Apr 1998 23:56:14 +0200 (MET DST) From: Johnny Billquist &lt;bqt(a)Update.UU.SE&gt; To: Pete Turnbull &lt;pete(a)dunnington.u-net.com&gt; cc: pups(a)minnie.cs.adfa.oz.au Subject: Re: PDP-11 Addressing Modes In-Reply-To: &lt;9804152208.ZM16395(a)indy.dunnington.york.ac.uk&gt; Message-ID: &lt;Pine.VUL.3.93.980415234941.9250J-100000(a)Zeke.Update.UU.SE&gt; MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-pups(a)minnie.cs.adfa.oz.au Precedence: bulk On Wed, 15 Apr 1998, Pete Turnbull wrote: You got to be kidding?!? <FLAME ON> The 68K is a miserable beast at the best of times. Separated address and data registers, PC is a special register, some addressing modes are not allowed in some instructions, some manipulations can only be done on data register, not address registers, immediate mode is just an assembler fake, it's actually another instruction, the semantics of some instructions differ depending on what type of arguments you use, writing PIC can be a real pain unless you have the 68K20. The list is long and sad. The 68K is what happens if you take a good design (PDP-11) and mungle up every part of the design. It's like if they never really understood why the PDP-11 was done they way it was, and copied the parts they though nifty and continued with adding their own strange ideas on top of it. <FLAME OFF> Having said all this, it's still a nice thing compared to Intel stuff, I guess. :-) (But I've only programmed the Z80...) Johnny Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt(a)update.uu.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol Received: (from major@localhost) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) id IAA06096 for pups-liszt; Thu, 16 Apr 1998 08:01:13 +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 psychvax.psych.usyd.edu.au (psychvax.psych.usyd.edu.au [129.78.83.1]) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) with ESMTP id IAA06090 for &lt;pups(a)minnie.cs.adfa.oz.au&gt;; Thu, 16 Apr 1998 08:01:08 +1000 (EST) Received: (from johnh@localhost) by psychvax.psych.usyd.edu.au (8.8.8/8.8.8) id IAA06424 for pups(a)minnie.cs.adfa.oz.au; Thu, 16 Apr 1998 08:00:52 +1000 Date: Thu, 16 Apr 1998 08:00:52 +1000 From: John Holden &lt;johnh(a)psychvax.psych.usyd.edu.au&gt; Message-Id: &lt;199804152200.IAA06424(a)psychvax.psych.usyd.edu.au&gt; To: pups(a)minnie.cs.adfa.oz.au Subject: Re: PDP-11 Newbie Alert --- (gotta start somewhere) Sender: owner-pups(a)minnie.cs.adfa.oz.au Precedence: bulk The 11/20 used a switch mode power supply (H720) (I still have a functional machine!). You would have to go back to something like a PDP8/e (got one of these two!) for a huge linear power supply. It has a huge SCR for the overvoltage crowbar in order to dump all the energy in the filter capacitors Received: (from major@localhost) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) id IAA06106 for pups-liszt; Thu, 16 Apr 1998 08:01:19 +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 Zeke.Update.UU.SE (2026(a)Zeke.Update.UU.SE [130.238.11.14]) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) with ESMTP id IAA06088 for &lt;pups(a)minnie.cs.adfa.oz.au&gt;; Thu, 16 Apr 1998 08:00:32 +1000 (EST) Received: from localhost (bqt@localhost) by Zeke.Update.UU.SE (8.8.8/8.8.8) with SMTP id AAA12933; Thu, 16 Apr 1998 00:00:22 +0200 Date: Thu, 16 Apr 1998 00:00:20 +0200 (MET DST) From: Johnny Billquist &lt;bqt(a)Update.UU.SE&gt; To: Pete Turnbull &lt;pete(a)dunnington.u-net.com&gt; cc: PDP Unix Preservation &lt;pups(a)minnie.cs.adfa.oz.au&gt; Subject: Re: PDP-11 Newbie Alert --- (gotta start somewhere) In-Reply-To: &lt;9804152230.ZM16484(a)indy.dunnington.york.ac.uk&gt; Message-ID: &lt;Pine.VUL.3.93.980415235648.9250K-100000(a)Zeke.Update.UU.SE&gt; MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-pups(a)minnie.cs.adfa.oz.au Precedence: bulk On Wed, 15 Apr 1998, Pete Turnbull wrote: Sigh. Why can't I get the last word. :-) Is there anyone who can figure out any more models? Eh? I'd definitely say that the Falcon was a PDP-11, it does sport a F11. Actually, it was called the 11/21, or something like that, wasn't it? But it was a board, and not a machine... What about the VT103? Johnny Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt(a)update.uu.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol Received: (from major@localhost) by minnie.cs.adfa.oz.au (8.8.5/8.8.5) id JAA06285 for pups-liszt; Thu, 16 Apr 1998 09:08:21 +1000 (EST) X-Authentication-Warning: minnie.cs.adfa.oz.au: major set sender to owner-pups(a)minnie.cs.adfa.oz.au using -f