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Article #625508Re: PDP 11/40 system manual
From: Charlie Gibbs
Date: Wed, 15 Aug 2018 23:58
Date: Wed, 15 Aug 2018 23:58
29 lines
2874 bytes
2874 bytes
On 2018-08-15, hanc...@bbs.cpcn.com <hanc...@bbs.cpcn.com> wrote: > On Friday, August 10, 2018 at 6:10:47 PM UTC-4, John Levine wrote: > >> The S/360 was a tour de force but it had plenty of uglies that people >> have been dealing with ever since, the worst of which was 24 bit >> addressing. > > I think in the very early 1960s when they envisioned S/360, 24 > bit (16 meg) was deemed more than adequate. Storage was very > expensive back then. I don't believe S/360 ever existed 16 meg, > indeed, I think it took a long time until S/370 even exceeded it. > > Our 370-158 had all of 6 meg, serving a large organization and > 500 terminals. I never heard of a 360 having a full 16MB, and I suspect that nobody could justify the cost. A while after the 370 line came out, I remember reading in a trade rag how IBM rocked the industry by slashing the price of a megabyte of memory from $75,000 to a mere $15,000. (And those were early-'70s dollars.) And now SD cards are a dollar a gigabyte. <shakes head in wonder> -- /~\ cgibbs@kltpzyxm.invalid (Charlie Gibbs) \ / I'm really at ac.dekanfrus if you read it the right way. X Top-posted messages will probably be ignored. See RFC1855. / \ Fight low-contrast text in web pages! http://contrastrebellion.com
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X-Received: by 2002:a5d:4042:: with SMTP id w2-v6mr2295653wrp.17.1534377596124; Wed, 15 Aug 2018 16:59:56 -0700 (PDT) X-BeenThere: alt.folklore.computers@googlegroups.com Received: by 2002:adf:e38b:: with SMTP id e11-v6ls924638wrm.5.gmail; Wed, 15 Aug 2018 16:59:55 -0700 (PDT) X-Received: by 2002:a5d:490a:: with SMTP id x10-v6mr2286277wrq.27.1534377595631; Wed, 15 Aug 2018 16:59:55 -0700 (PDT) MIME-Version: 1.0 Path: mbox-mo1.pugleaf.net!p4-v6ni17096wmb.0!nntp.google.com!goblin1!goblin2!goblin.stu.neva.ru!newsfeed.xs4all.nl!newsfeed8.news.xs4all.nl!85.12.16.70.MISMATCH!peer03.ams1!peer.ams1.xlned.com!news.xlned.com!peer03.am4!peer.am4.highwinds-media.com!peer03.iad!feed-me.highwinds-media.com!news.highwinds-media.com!spln!extra.newsguy.com!newsp.newsguy.com!news3 From: Charlie Gibbs <cgibbs@kltpzyxm.invalid> Newsgroups: alt.folklore.computers Subject: Re: PDP 11/40 system manual Date: 15 Aug 2018 23:58:51 GMT Organization: NewsGuy - Unlimited Usenet $23.95 Lines: 29 Message-ID: <pl2enr02fij@news3.newsguy.com> References: <21aaeee8-c41a-4442-a4eb-ea6a29b1e4f1@googlegroups.com> <mdd7ekzl6pr.fsf@panix5.panix.com> <pki8ae$ca0$1@dont-email.me> <1028478389.555543171.735142.peter_flass-yahoo.com@news.eternal-september.org> <pkl2h6$abc$2@gal.iecc.com> <715eff9f-01d8-439d-98a2-5e199e66ddc7@googlegroups.com> NNTP-Posting-Host: pec066fbc577cb8671d10961721b866258a89447b82227fac.newsdawg.com User-Agent: slrn/1.0.3 (Linux) X-Received-Bytes: 2158 X-Received-Body-CRC: 537628732 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit