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Article #625596Re: 360/20, was PDP 11/40 system manual
From: Peter Flass
Date: Fri, 17 Aug 2018 18:40
Date: Fri, 17 Aug 2018 18:40
23 lines
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2593 bytes
John Levine <jo...@taugh.com> wrote: > In article <f4077026-2b80-47e0...@googlegroups.com>, > Quadibloc <jsa...@ecn.ab.ca> wrote: >>> Maybe making a cheap 1401 wouldn't have been a bad idea. >> >> And don't forget that the 360/20 wasn't compatible either. > > The instruction set was different (mostly upward compatible with a > real 360 which as far as I can tell, never mattered) but most of the > peripherals were the same. > > The 2560 MFCM card read/punch/interpret/sort/crumple device and the > internal modems were unique to the /20 but the 1403 printer, 2415 tape, > and everything else were regular 360 devices. The 2311 disk was the > same physical drive and pack, but the disks used fixed sectors so you > couldn't read or write them on anything but another /20. > True? I thought you could read, but not write them, because the sectors looked like CKD blocks, but maybe I'm thinking of another system. -- Pete
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X-Received: by 2002:a6b:3ad4:: with SMTP id h203-v6mr15929100ioa.94.1534531254787; Fri, 17 Aug 2018 11:40:54 -0700 (PDT) X-BeenThere: alt.folklore.computers@googlegroups.com Received: by 2002:a6b:7508:: with SMTP id l8-v6ls1368467ioh.1.gmail; Fri, 17 Aug 2018 11:40:54 -0700 (PDT) X-Received: by 2002:a6b:6312:: with SMTP id p18-v6mr7233462iog.43.1534531254260; Fri, 17 Aug 2018 11:40:54 -0700 (PDT) Path: mbox-mo1.pugleaf.net!g5-v6ni1107iti.0!nntp.google.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!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: 360/20, was PDP 11/40 system manual Date: Fri, 17 Aug 2018 14:40:53 -0400 Organization: A noiseless patient Spider Lines: 23 Message-ID: <1333283745.556223976.095645.peter_flass-yahoo.com@news.eternal-september.org> References: <21aaeee8-c41a-4442-a4eb-ea6a29b1e4f1@googlegroups.com> <pkmrkc$6lm$1@dont-email.me> <44cb1c4c-62c4-4ddb-8261-762e02825158@googlegroups.com> <f4077026-2b80-47e0-8279-3abab7f5cef0@googlegroups.com> <pl74iu$2cq2$1@gal.iecc.com> Mime-Version: 1.0 Injection-Info: reader02.eternal-september.org; posting-host="2e496bef88fc0241b89c212218c61757"; logging-data="17173"; mail-complaints-to="ab...@eternal-september.org"; posting-account="U2FsdGVkX1+ZzsiVvVvGAKZ4z5m42/FV" User-Agent: NewsTap/5.3.1 (iPad) Cancel-Lock: sha1:ckoKZ49mxFkJ96IE/x+q0qAvzgk= sha1:GhGe0GODcu4XDgr8zj1j7Kc77q4= Bytes: 2203 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit