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From: darrelj@sdcrdcf.UUCP (Darrel VanBuer)
Newsgroups: net.works
Subject: Re: mickey-mouse mice - (nf)
Message-ID: <904@sdcrdcf.UUCP>
Date: Sat, 10-Mar-84 10:41:14 EST
Article-I.D.: sdcrdcf.904
Posted: Sat Mar 10 10:41:14 1984
Date-Received: Sun, 25-Mar-84 07:38:41 EST
References: <2724@fortune.UUCP>
Reply-To: darrelj@sdcrdcf.UUCP (Darrel VanBuer)
Organization: System Development Corporation, Santa Monica
Lines: 24

A previous note complained of the Macintosh mouse having the tracking ball
at the opposite end from the button, and (tentatively) recalling the Xerox
Alto had the ball under the buttons.
The mice in Xerox equipment have gone thru three generations on the Altos
and Dolphins.
1) back into antiquity (i.e. 10 years) they used a Hawley mouse with the
main ball under the buttons (actually requires levers, the switches are at
the other end)
2) about a year ago, Hawley turned the mouse around and took out the levers,
so the ball in not under the buttons.
3) Xerox has just switched to their own optical design (which works on
almost any textured surface, even a table cloth) which has the "ball" back
under the buttons again.
Mistracking from ball position may be slightly less for all Xerox mice
because the mouse is smaller than the Apple mice.

-- 
Darrel J. Van Buer, PhD
System Development Corp.
2500 Colorado Ave
Santa Monica, CA 90406
(213)820-4111 x5449
...{allegra,burdvax,cbosgd,hplabs,ihnp4,sdccsu3,trw-unix}!sdcrdcf!darrelj
VANBUER@USC-ECL.ARPA