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From: todd@uhccux.UUCP (The Perplexed Wiz)
Newsgroups: comp.sys.ibm.pc
Subject: Re: millisecond timing
Message-ID: <688@uhccux.UUCP>
Date: Wed, 15-Jul-87 15:24:46 EDT
Article-I.D.: uhccux.688
Posted: Wed Jul 15 15:24:46 1987
Date-Received: Sat, 18-Jul-87 01:49:28 EDT
References: <4343@jade.BERKELEY.EDU> <62@b.gp.cs.cmu.edu>
Reply-To: todd@uhccux.UUCP (The Perplexed Wiz)
Organization: U. of Hawaii, Manoa (Honolulu)
Lines: 21

In article <62@b.gp.cs.cmu.edu> ralf@b.gp.cs.cmu.edu (Ralf Brown) writes:
>It is possible to get timing loops which are independent of CPU speed (well,
>almost--they can't handle changing clock speed in the middle).  Turbo Pascal
>does this to get the DELAY function to work regardless of clock speed, and

I haven't tried it but there is an assembly language routine in the
Feb 1987 issue of "Behavior Research Methods, Instruments, & Computers"
that claims to provide 1msec timing accuracy on an IBM PC.

	Graves, Roger, & Bradley, Ron (1987).  Millisecond interval
		timer and auditory reaction time programs for the
		IBM PC.  Behavior Research Methods, Instruments,
		and Computers, 19: 30-35.

...todd

-- 
Todd Ogasawara, U. of Hawaii Center for Teaching Excellence
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