Messages in this thread | | | Date | Wed, 21 Apr 1999 10:02:07 -0400 (EDT) | From | "Richard B. Johnson" <> | Subject | Re: A/D converter |
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On Wed, 21 Apr 1999, Philip Blundell wrote:
> >The maximum number available is slightly less than 50,000. This is > >on my fastest dual-pentium 400 Mhz. Other machines I have tested are > >slower. > > That equates to one interrupt every 20us, which seems pretty slow. Did you > attempt to discover what the bottleneck was? You might find that the parallel > port circuitry is slowing things down -- the ACK pin doesn't connect directly > to an interrupt line. >
Yes it does. And, in fact, a simple real-mode DOS ISR which uses the same hardware (as stated) runs approximately 10 times faster. I get damn tired of having everybody and their brother "explain" that I don't know what I'm doing. I presented true, factual, information. It was not a complaint. It was just fact. Take it or leave it.
Cheers, Dick Johnson ***** FILE SYSTEM WAS MODIFIED ***** Penguin : Linux version 2.2.6 on an i686 machine (400.59 BogoMips). Warning : It's hard to remain at the trailing edge of technology.
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