On Wed, Aug 28, 2002 at 08:18:25AM -0400, Richard B. Johnson wrote:
> No, no, no. There is no such port read that takes 18 microseconds, even
> on old '386 machines with real ISR slots. A port read on those took
> almost exactly 300 nanoseconds and, in fact, was the limiting factor
> for the programmed I/O devices on the ISA bus.
Amazing how they can do that with a bus clock that is much slower -)
-- --------------------------------------------------------- Victor Yodaiken Finite State Machine Labs: The RTLinux Company. www.fsmlabs.com www.rtlinux.com- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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