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From: jcb@loral.UUCP (Jay Bowden)
Newsgroups: comp.sys.ibm.pc
Subject: Elapsed time finer than 55 ms on PC?
Keywords: PC CLOCK TIME
Message-ID: <2402@loral.UUCP>
Date: 9 Oct 89 14:22:38 GMT
Organization: Loral Instrumentation, San Diego
Lines: 20


 I am hoping for information on measuring elapsed time in
 finer ticks than the clock tick (55 ms) on a standard PC
 (not AT).  Can I read the current value of the counter
 inside the 8253 that is generating the clock tick?  Even
 better would be a little code that does something like this...

 My ultimate use is to time tag bytes that come in from the
 serial port, to characterize delays (modem vs. direct, etc).

 Thanks!

 - Jay


-- 
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Jay Bowden, EE/Consultant; see also Bowden Engineering
Currently contracted at Loral Instrumentation, San Diego
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