Hi Ray. > Now 500 x 10 = 5000 usec, or 1/200 seconds. But the loop > actually takes 10 seconds to iterate. This implies that > usleep() has a minimum delay of 10/500 seconds, or 20 > msec, built into it (at least on my test system).
The standard PC BIOS sets up the hardware timer with a tick interval of 18.2 ms which is probably what you are seeing. Memory says that the reason for this is that there are 2^16 (65,536) such ticks per hour, and that apparently made the original IBM PC BIOS somewhat simpler as a result. Best wishes from Riley. --- * Nothing as pretty as a smile, nothing as ugly as a frown. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.488 / Virus Database: 287 - Release Date: 5-Jun-2003 - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs
