Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!apple!wingo@apple.com
From: wingo@apple.com (Anthony Wingo)
Newsgroups: comp.sys.mac.programmer
Subject: Re: TicksCount
Message-ID: <14021@goofy.Apple.COM>
Date: 12 Jun 91 01:20:05 GMT
References: <5721@hemuli.tik.vtt.fi> <1991Jun11.092513.14329@cs.uri.edu>
Sender: usenet@Apple.COM
Organization: Apple Computer
Lines: 25

In article <1991Jun11.092513.14329@cs.uri.edu>, reynhout@cs.uri.edu (Andrew Reynhout) writes:
> 
> In article <5721@hemuli.tik.vtt.fi> aku@tik.vtt.fi (Arto Kujala) writes:
> >Is there a way to get more accurate time than function TickCount
> >gives?
> >
> >1/100 sec precision would be appropriate.
> 
>    Unfortunately, you'd need discrete hardware to do this.  The Mac gets its
> clock signals from the 60Hz AC input.  Of course, it would be very *simple*
> hardware...perhaps there is something out there.
> 
>    Hmm.  In europe, where the freq of the AC is 50Hz, does TickCount() have a
> 1/50sec resolution?
> -- 
>    <reynhout@cs.uri.edu>
> 
> 
Actually, the 60Hz tick is divided down from the crystal.  And it isn't 60Hz either,
it is 60.15 Hz, which can be a nuisence if your using it for timing. (See IM III-18
and V-566).

Use the Time Manager (IM IV-297) for more accurate counting.

 - Tony Wingo