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Article #12501

Re: A better theory for Endian origins

#12501
From: Jim Haynes
Date: Fri, 08 Jan 1993 21:45
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In article <1993Jan8.185448.2405@news.uiowa.edu> jones@pyrite.cs.uiowa.edu (Douglas W. Jones,201H MLH,3193350740,3193382879) writes:
>The decision whether to go big-endian or little-endian on byte numbering
>has natural ties to the bit numbering in a word, and this is, I think,
>one of the historical forces behind the war of the endians.

Now this opens the can of another bunch of old war stories.  The Burroughs
B5500 had the bits numbered in one direction in the hardware maintenance
manuals and the opposite direction in the software manuals.  If I remember
correctly (at chance!) the numbering was 1 2 3 4 for the hardware people
and 3 2 1 0 for the software, yet the machine was big-endian.

Then the G.E./Honeywell machines had the bits numbered in one direction
in the CPU and in the opposite direction in the I/O controller.  At least
on the G.E. 635 generation
-- 
haynes@cats.ucsc.edu
haynes@cats.bitnet

"Ya can talk all ya wanna, but it's dif'rent than it was!"
"No it aint!  But ya gotta know the territory!"
        Meredith Willson: "The Music Man"
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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!hal.com!darkstar.UCSC.EDU!cats.ucsc.edu!haynes
From: haynes@cats.ucsc.edu (Jim Haynes)
Newsgroups: comp.arch
Subject: Re: A better theory for Endian origins
Message-ID: <1iksm4INN70g@darkstar.UCSC.EDU>
Date: 8 Jan 93 21:45:40 GMT
References: <1ikepuINNgt7@spim.mti.sgi.com> <1993Jan8.185448.2405@news.uiowa.edu>
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