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Article #986Re: How do i determine the clock frequency on a 80xxx?
From: Kevin Todd Schmidt
Date: Tue, 29 Sep 1992 20:03
Date: Tue, 29 Sep 1992 20:03
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1235 bytes
47@unpcs1.cs.unp.ac.za (menglund) writes: >I am wanting to know how to determine a machines clock frequency dynamically >within a program. (eg: 8MHz, 16MHz ect). The way I do it is to measure the time it takes to execute a big block of NOP's. You may need to loop around the block a few times to get an accurate measurement. Then, based on the number of NOP's executed you can calculate the clock speed since you know the number of clocks needed for a NOP to execute. If you have any questions let me know. Kevin -- Jet Propulsion Laboratory | schmke@cco.caltech.edu 4800 Oak Grove Dr. | schmidt@spc5.jpl.nasa.gov M/S 525-3684 | Pasadena, CA 91109 |
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Path: arc1-ca.pugleaf.net!sparky!uunet!know!cass.ma02.bull.com!think.com!yale.edu!qt.cs.utexas.edu!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!nntp-server.caltech.edu!schmke From: schmke@cco.caltech.edu (Kevin Todd Schmidt) Newsgroups: comp.sys.intel Subject: Re: How do i determine the clock frequency on a 80xxx? Message-ID: <1aacqcINNhs@gap.caltech.edu> Date: 29 Sep 92 20:03:24 GMT References: <47.1.717776998@unpcs1.cs.unp.ac.za> Organization: California Institute of Technology, Pasadena Lines: 19 NNTP-Posting-Host: sandman.caltech.edu