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Article #625471Re: different architecture, was PDP 11/40 system manual
From: Peter Flass
Date: Wed, 15 Aug 2018 15:20
Date: Wed, 15 Aug 2018 15:20
24 lines
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2567 bytes
Scott Lurndal <scott@slp53.sl.home> wrote: > John Levine <jo...@taugh.com> writes: >> In article <mdd1sb0...@panix5.panix.com>, >> Rich Alderson <ne...@alderson.users.panix.com> wrote: >>>> GE 635. It was OK, but the profusion of byte instructions added to >>>> the later models of -10 suggest that it didn't work that well. >>> >>> "Profusion of byte instructions"? Lemme see, LDB, DPB, ILDB, IDBP, IBP/ADJBP. >>> Or are you talking about the string instructions added by the VAX crowd who >>> got into the microcode? >> >> The latter. They do resemble the Vax instructions which resemble 360 >> instructions like ED and TRT. > > or EDT and TRN on the contemporaneous B-3500 (albeit not microcoded). > > http://vseries.lurndal.org/doku.php?id=instructions:edt > http://vseries.lurndal.org/doku.php?id=instructions:trn > If you have a TR instruction, TRT is trivial to implement in hardware. -- Pete
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X-Received: by 2002:a1c:6c01:: with SMTP id h1-v6mr2046201wmc.7.1534346460537; Wed, 15 Aug 2018 08:21:00 -0700 (PDT) X-BeenThere: alt.folklore.computers@googlegroups.com Received: by 2002:adf:df10:: with SMTP id y16-v6ls647570wrl.1.gmail; Wed, 15 Aug 2018 08:20:59 -0700 (PDT) X-Received: by 2002:adf:ce85:: with SMTP id r5-v6mr2275230wrn.22.1534346459679; Wed, 15 Aug 2018 08:20:59 -0700 (PDT) Path: mbox-mo1.pugleaf.net!a22-v6ni6264wmg.0!nntp.google.com!goblin3!goblin2!goblin1!goblin.stu.neva.ru!eternal-september.org!feeder.eternal-september.org!reader02.eternal-september.org!.POSTED!not-for-mail From: Peter Flass <peter...@yahoo.com> Newsgroups: alt.folklore.computers Subject: Re: different architecture, was PDP 11/40 system manual Date: Wed, 15 Aug 2018 11:20:59 -0400 Organization: A noiseless patient Spider Lines: 24 Message-ID: <773958644.556039128.132461.peter_flass-yahoo.com@news.eternal-september.org> References: <21aaeee8-c41a-4442-a4eb-ea6a29b1e4f1@googlegroups.com> <1355830485.555945700.866949.peter_flass-yahoo.com@news.eternal-september.org> <pkut64$lt6$1@gal.iecc.com> <mdd1sb0n1tl.fsf@panix5.panix.com> <pkvhkl$2brk$2@gal.iecc.com> <ejWcD.81722$vh4.54414@fx37.iad> Mime-Version: 1.0 Injection-Info: reader02.eternal-september.org; posting-host="c2bd7c5be71e2013232f5b745031d513"; logging-data="17778"; mail-complaints-to="ab...@eternal-september.org"; posting-account="U2FsdGVkX18xCWk9NgRqXmUjdNvJsG8q" User-Agent: NewsTap/5.3.1 (iPad) Cancel-Lock: sha1:u2Gpwn0VG9jqNy1LSYqJALFlXDE= sha1:ArKWPWXwtS4P0g+4V5YMI2RNjuw= Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit