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It appears that the 9010A can be used for measuring frequency up to about
4 mhz. No tidy, more a compare function using the probe. Look in the docs
with theFrederick's f9010.zip in the archive. This would be useful with
test routines where you are looking for just a few specific frequencies,
for example, on Pacman, the interrupt needs to be at a set frequency-this
you could check. Or on Bally/Stern MPUs the 555 timer has a set frequency
that should be checked every repair...<br><br>
Here is the description:<br>
<font face="Courier, Courier" size=4><b>------------------------------------<begin>--------------------------------<br>
Frequency counter using the probe<br><br>
</b>There is a FREQUENCY command that enables a frequency counter on the
probe -- up to around 4 MHZ, any way. The compiler will insert
assembly language code into your compiled code and when frequency
requesting is done, the compiler will execute that code. The way
the frequency counter is used would look something like this:<br>
<dl>
<dd>:equate frequency as :next
<dd> execute frequency<br><br>
</dl>The result of the frequency measurement will be placed into either
<u>REG0.or REGF depending upon which version of this compiler you
have. It’s up to you to determine whether the frequency count goes
into REG0 or REGF for your version of the compiler, I’m sorry to
say. The example code provided here assumes that REG0 is the
register which receives the value. You can simply do a test by
displaying both REG0 and REGF, doing the FREQUENCY command, and then
displaying REG0 and REGF again to see which one changed. After you
know which register is used, make a note.<br><br>
After you have equated “frequency” to a program number, to use the
frequency counter, then, you could do something like this:<br>
<dl>
<dd> execute frequency
<dd> if REG0 > 1860000 goto 1
<dd> display CLOCK LOOKS BAD
<dd> goto 2
<dd>label 1
<dd> display FREQUNCY LOOKS GOOD
<dd>label 2</u></font>
</dl>----------------------------------------------------------------------------------------------------------<30>--------------------------------------------------<br><br>
I wonder if this will work with the rksic.exe compiler? I like using that
compiler as it is all in one system, and I find it cumbersome to run
several compilers in DOS windows...but the documentation provided with
Frederick Rice's f9010.zip is superior to anything I had found
before.<br><br>
-->> The Fluke archive is @
<a href="http://www3.telus.net/Flippers/Fluke" eudora="autourl">http://www3.telus.net/Flippers/Fluke</a>
<<--<br><br>
John :-#)#<br><br>
At 08:06 AM 22/01/2002 -0500, Kev wrote:<br><br>
<blockquote type=cite class=cite cite>What model is yours & what are the differences between the various HP<br>
models?<br><br>
Thanks,<br>
Kev<br><br>
<br>
> I picked up a HP Signature Voltmeter from eBay for a good price a year or<br>
> so ago, has a nice counter built in...I have some spare parts, thanks to<br>
Al<br>
> K. who sent me a dead one.<br>
><br>
> John :-#)#<br><br>
<br>
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Received on Tue Feb 12 07:08:23 2002
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