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Article #625611Re: PDP 11/40 system manual
From: David Wade
Date: Fri, 10 Aug 2018 11:36
Date: Fri, 10 Aug 2018 11:36
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3314 bytes
On 10/08/2018 00:44, Michael Black wrote: > On Thu, 9 Aug 2018, Elliott Roper wrote: > > > >> I guess everybody's idea of elegance is skewed by the first machine you >> really really loved. >> > I think that's true. I started with the 6502 and when I started looking > at 8080 code, it looked "odd". Just different from what I was used to. > I moved to the 6809, lots of similarity to the 6502, and then the 68000, > but didn't stick with it since that clearance Atari 520st had a fault > that I never fully tracked down. I think one reason I didn't use Linux > until 2001 was because I kept hoping to come across a used Mac that was > good enough to run Linux, me wanting to stick with the 68000. That > didn't happen, though after I bought a used 200MHz Pentium to run Linux > in 2001, I soon found a very cheap Mac 6100 which had the RISC CPU in it > and could run Linux, but I never got to that. > > Of course, by then it was really just habit, it's not like I've ever > programmed anything in assembly language after the 6809. > > Michael > If one is looking for elegance in early machines, then the Ferranti Pegasus is an interesting starting point. According to Simon Lavington's book https://www.amazon.co.uk/Pegasus-Story-History-Vintage-Computer/dp/1900747405 it was one of the first computers to be designed to be easy to program, rather than easy to build. It has a remarkably orthogonal instructions, with uniform address modifications on each instruction. A nice page about it here:- https://cswww.essex.ac.uk/staff/lavington/Pegasus/index.htm Dave Wade
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X-Received: by 2002:a1c:e082:: with SMTP id x124-v6mr148404wmg.28.1533900970528; Fri, 10 Aug 2018 04:36:10 -0700 (PDT) X-BeenThere: alt.folklore.computers@googlegroups.com Received: by 2002:a1c:2d8e:: with SMTP id t136-v6ls310950wmt.7.gmail; Fri, 10 Aug 2018 04:36:09 -0700 (PDT) X-Received: by 2002:a1c:7c19:: with SMTP id x25-v6mr175006wmc.20.1533900969679; Fri, 10 Aug 2018 04:36:09 -0700 (PDT) Path: mbox-mo1.pugleaf.net!i6-v6ni2703wmf.0!nntp.google.com!goblin1!goblin.stu.neva.ru!eternal-september.org!feeder.eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail From: David Wade <g4ugm@dave.invalid> Newsgroups: alt.folklore.computers Subject: Re: PDP 11/40 system manual Date: Fri, 10 Aug 2018 12:36:11 +0100 Organization: A noiseless patient Spider Lines: 43 Message-ID: <pkjtb9$r4g$1@dont-email.me> References: <21aaeee8-c41a-4442-a4eb-ea6a29b1e4f1@googlegroups.com> <0001HW.211B94B1040CADA5700004B5B2CF@news.giganews.com> <ft2elhF238vU3@mid.individual.net> <0001HW.211CFAE60460A23F700004B5B2CF@news.giganews.com> <alpine.LNX.2.20.1808091939460.10949@thrush> Mime-Version: 1.0 Injection-Date: Fri, 10 Aug 2018 11:36:09 -0000 (UTC) Injection-Info: reader02.eternal-september.org; posting-host="ca36dbe8d3ec4adf291b5a7a3c43963e"; logging-data="27792"; mail-complaints-to="ab...@eternal-september.org"; posting-account="U2FsdGVkX184WF+BB2YuHY3JgNA1J8LK" User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 Cancel-Lock: sha1:q/xk0v7C/WO0CH/07La5Xm+hn6g= In-Reply-To: <alpine.LNX.2.20.1808091939460.10949@thrush> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit