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From: kim@amdahl.amdahl.com (Kim DeVaughn)
Newsgroups: comp.sys.amiga
Subject: The time (my watch has troubles) has come ...
Message-ID: <16516@amdahl.amdahl.com>
Date: Sun, 18-Oct-87 23:56:33 EDT
Article-I.D.: amdahl.16516
Posted: Sun Oct 18 23:56:33 1987
Date-Received: Tue, 20-Oct-87 00:38:23 EDT
Organization: Amdahl Corporation,  Sunnyvale, CA 94086
Lines: 47
Keywords: I hope there are knobs in there


[ There ain't no such thing as a free line. ]

I've been burning-in my B2000, and have noticed that accuracy of both the
normal internal clock (timer, really) and the battery-backed-up RTC are
unacceptable.

Can someone at CATS (Dave, George, Carolyn) please tell me if/where the
trimmers are so I can get these clocks running right?  I'd prefer not to
have to go thru the hassle of returning the machine to the dealer for just
an adjustment.

Though it should not matter, I have a 68010 in the machine (you *don't* have
any s/w timing loops in there, do you?)

In case you're interested, here are the numbers (all +/- 1 sec.):


Internal clock/timer:

   204 sec. slow in  69,520 sec.
   302 sec. slow in 102,600 sec.

Or approximately 0.29% SLOW.


RTC:

    61 sec. fast in 103,060 sec.

Or approximately 0.06% FAST.


Why aren't these locked to the line frequency, which has very good long-term
accuracy, though may suffer from short-term stability?


/kim



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