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From: naftoli@aecom.UUCP
Newsgroups: comp.sys.mac
Subject: Re: Animated watch cursor.
Message-ID: <881@aecom.UUCP>
Date: Sun, 1-Feb-87 13:57:49 EST
Article-I.D.: aecom.881
Posted: Sun Feb  1 13:57:49 1987
Date-Received: Tue, 3-Feb-87 02:07:50 EST
References: <7488@decwrl.DEC.COM> <603@runx.OZ> <607@runx.OZ> <176@trwspf.UUCP> <777@vaxb.calgary.UUCP>
Organization: Albert Einstein College of Medicine, NY
Lines: 15
Summary: I don't think it is implemented using vertical retrace tasks

In article <777@vaxb.calgary.UUCP>, radford@calgary.UUCP (Radford Neal) writes:
> I presume these animated watch cursors are implemented by installing a
> vertical retrace interrupt routine. If so, they aren't a very reliable
> guide to whether the application as a whole is still operating. My guess
> is that the watch cursor will keep turning as long as you can move the
> mouse.

I don't think it is implemented using vertical retrace since it spins
irregularly.  If it was implemented using vertical retrace, I would
think it would spin at regular intervals.
-- 
Robert N. Berlinger
Systems Analyst, Scientific Computing Center		Compuserve: 73047,741
Albert Einstein College of Medicine			Easylink:   62956067
UUCP: ...{philabs,cucard,pegasus,rocky2}!aecom!naftoli	GEnie:	    R.Berlinger