Article View: alt.folklore.computers
Article #625487Re: different architecture, was PDP 11/40 system manual
From: Scott Lurndal
Date: Tue, 14 Aug 2018 13:26
Date: Tue, 14 Aug 2018 13:26
23 lines
2858 bytes
2858 bytes
John Levine <jo...@taugh.com> writes: >In article <5b71ce88...@news.dslextreme.com> you write: >>Your so-called "categories" are arbitrary and mostly meaningless. Even before >>the advent of the 360, they were always "general purpose" computers. Meaning >>they could be used for any application, given the proper programming. The >>salient differences were in CPU speed, storage capacity, and data transfer >>rates. ... > >Yes and no. The architecture of the binary word addressed 704x/709x >scientific machines was rather different from the decimal word 7070 or >the character addressed 705/7080. Sure, they were all Turing >complete, but the 7080 was bad at floating point arithmetic and the >7090 was bad at moving character strings around. But even then, IBM didn't soley define the computer business. > >We all think it's obvious to have byte/word addressing where the word >addresses are byte addresses with the low bits zero, but it wasn't >obvious at all before IBM invented it for the 360. Digit addressibility in the B3500 is quite similar, which considered 4 digits a word.
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X-Received: by 2002:a6b:7a01:: with SMTP id h1-v6mr9600202iom.16.1534253171294; Tue, 14 Aug 2018 06:26:11 -0700 (PDT) X-BeenThere: alt.folklore.computers@googlegroups.com Received: by 2002:a24:2909:: with SMTP id p9-v6ls1645360itp.0.canary-gmail; Tue, 14 Aug 2018 06:26:10 -0700 (PDT) X-Received: by 2002:a24:f5c1:: with SMTP id k184-v6mr4201680ith.7.1534253170568; Tue, 14 Aug 2018 06:26:10 -0700 (PDT) MIME-Version: 1.0 Path: mbox-mo1.pugleaf.net!g5-v6ni765iti.0!nntp.google.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!weretis.net!feeder6.news.weretis.net!feeder4.news.weretis.net!newsreader4.netcologne.de!news.netcologne.de!peer03.ams1!peer.ams1.xlned.com!news.xlned.com!peer03.am4!peer.am4.highwinds-media.com!peer02.iad!feed-me.highwinds-media.com!news.highwinds-media.com!post02.iad!fx33.iad.POSTED!not-for-mail X-newsreader: xrn 9.03-beta-14-64bit Sender: scott@dragon.sl.home (Scott Lurndal) From: scott@slp53.sl.home (Scott Lurndal) Reply-To: sl...@pacbell.net Subject: Re: different architecture, was PDP 11/40 system manual Newsgroups: alt.folklore.computers References: <21aaeee8-c41a-4442-a4eb-ea6a29b1e4f1@googlegroups.com> <1769532633.555587539.250400.peter_flass-yahoo.com@news.eternal-september.org> <d62afda2-8a91-4665-88a4-cb16bc0f47ab@googlegroups.com> <5b71ce88.4681852@news.dslextreme.com> <pksssc$2p6c$1@gal.iecc.com> Lines: 24 Message-ID: <RLAcD.120268$_Y1.60109@fx33.iad> X-Complaints-To: ab...@usenetserver.com NNTP-Posting-Date: Tue, 14 Aug 2018 13:26:09 UTC Organization: UsenetServer - www.usenetserver.com Date: Tue, 14 Aug 2018 13:26:09 GMT X-Received-Bytes: 2078 X-Received-Body-CRC: 1082282044 Bytes: 2364 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit