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Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!ihnp4!bentley!rld
From: rld@bentley.UUCP (Bob Duncanson)
Newsgroups: net.arch
Subject: Re: IBM-ASCII-C-Etc
Message-ID: <418@bentley.UUCP>
Date: Tue, 22-May-84 16:05:53 EDT
Article-I.D.: bentley.418
Posted: Tue May 22 16:05:53 1984
Date-Received: Wed, 23-May-84 09:39:09 EDT
References: <7032@umcp-cs.UUCP> <1083@sdcrdcf.UUCP>
Organization: AT&T Bell Laboratories, Piscataway
Lines: 23

> From: darrelj@sdcrdcf.UUCP
> Date: Tue, 15-May-84 08:26:39 EDT
> Article-I.D.: sdcrdcf.1083
> 
> 					... EBCDIC text can be
> shifted to upper case by just ORing X'40' (a blank) ...

So? in ASCII, a lowercase character can be shifted to uppercase by
SUBtracting an x'20' (also a blank).  Your machine has a SUBtract, I hope.
Converting upper to lower is ADDing the same x'20'.
ADD usually takes no longer than OR.
-- 

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 -************-------------		Bob Duncanson
 -************-------------		AT&T Bell Laboratories
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