Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!wuarchive!udel!brahms.udel.edu!lamb
From: lamb@brahms.udel.edu (Richard E Lamb)
Newsgroups: sci.electronics
Subject: Re: Servo driver
Message-ID: <18984@brahms.udel.edu>
Date: 22 Feb 91 16:40:43 GMT
References: <18861@brahms.udel.edu> <3417@polari.UUCP>
Distribution: all
Organization: University of Delaware
Lines: 12

In article <3417@polari.UUCP> mzenier@polari.UUCP (Mark Zenier) writes:
>In article <18861@brahms.udel.edu> lamb@brahms.udel.edu (Richard E Lamb) writes:
>
>Isn't there an 18 Hz real time clock interrupt that would stick its
>nose into any timing loops on a PC?
>
Yes, there is, but it tends to be a fairly constant time period unless
there is a key entered.  The jitter problem was real strange.  It wasn't
noticible at 8 Mhz, and I NEVER saw it on the Z-80 version.  I admit that
blaming it on refresh was perhaps grabbing at straws.  It was never a really
obnoxious problem, but I did spend an inordinant amount of  time trying to 
figure it out..... any OTHER ideas?


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