Date: Wed, 01 Nov 1995 01:20:59 -0800 From: David Greenman <davidg@Root.COM> To: "Garrett A. Wollman" <wollman@lcs.mit.edu> Cc: "Justin T. Gibbs" <gibbs@freefall.freebsd.org>, current@freebsd.org Subject: Re: Time problems Message-ID: <199511010920.BAA10684@corbin.Root.COM> In-Reply-To: Your message of "Tue, 31 Oct 95 12:47:55 EST." <9510311747.AA29686@halloran-eldar.lcs.mit.edu>
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>calibration. There are two possible sources of error involved here: > > 1) The part of your chipset that emulates the timer/counter is >operating at the wrong rate (or the DELAY function isn't working right >for it). > > 2) Your CPU's cycle counter is not operating at the nominal >rate, or its rate in MHz is not close to an integer. > >In talking to David Greenman about this problem, we found that one of >his machines which exhibits this problem suffers from (1). Other >people have suggested (2) for their motherboards. (David's >motherboard took about 12 seconds to perform a ten-second delay.) It was the other way around - it too 8.5 seconds to do a DELAY(10000000). -DG
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