questions about port and timer functions

Benjamin Riefenstahl
Sun Jan 18 16:07:00 GMT 1998

Hi Patrick,

Patrick J. Fay wrote:
[suggests asm( "rdtsc" ) for timing]

Yeah, right I forgot about that one. That is Pentium only IRC, but than
Pentiums are fairly standard these days and certainly o.k. for lab
tests. How do you calculate that frequency constant? Is there a direct
method to determine that?

There is also QueryPerformanceCounter() which is probably just a wrapper
around rdtsc. It has the additional advantage that you can use
QueryPerformanceFrequency() to get at the frequency.

so long, benny
Benjamin Riefenstahl (
Crocodial Communications EntwicklungsGmbH
Ophagen 16a, D-20257 Hamburg, Germany
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