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Article #74683Re: Backing store patent and X
From: Henry Thompson
Date: Thu, 28 Feb 1991 10:41
Date: Thu, 28 Feb 1991 10:41
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As regards the comments about Xerox PARC, I can certainly confirm that
the Interlisp-D window system used the backing-store approach (the
memory for the screen itself has the bits you see, each window has the
bits it is currently covering up) as early as 1978. Richard Burton
was responsible in the first instance. It is possible, even probably
given the antecedants of that work, that Smalltalk used this approach
as early as 1976. Peter Deutsch, for one, should know -- Peter, are
you listening?
So, what is the date on the Backing Store patent?
--
Henry Thompson, Human Communication Research Centre, University of Edinburgh
2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 31 667-1011 x6517
Fax: (44) 31 662-4912 ARPA: ht@cogsci.ed.ac.uk JANET: ht@uk.ac.ed.cogsci
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 1025b4,1b253318bf044b49 X-Google-Attributes: gid1025b4,public X-Google-ArrivalTime: 1991-03-01 00:25:54 PST Path: arc1-ca.pugleaf.net!gmdzi!unido!mcsun!ukc!edcastle!edcogsci!cogsci!ht From: ht@cogsci.ed.ac.uk (Henry Thompson) Newsgroups: gnu.misc.discuss Subject: Re: Backing store patent and X Message-ID: <HT.91Feb28104153@scott.cogsci.ed.ac.uk> Date: 28 Feb 91 10:41:53 GMT References: <ERU.91Feb25203738@tnvsu1.tele.nokia.fi> Sender: ht@cogsci.ed.ac.uk Distribution: gnu Organization: HCRC, University of Edinburgh Lines: 15 In-reply-to: eru@tnvsu1.tele.nokia.fi's message of 25 Feb 91 18:37:38 GMT