Messages in this thread | | | Date | Wed, 28 Jul 1999 22:34:49 +0100 (GMT) | From | Riley Williams <> | Subject | Re: [PATCH] HZ==100 assumptions |
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Hi Eric.
>> However, the standard used by MSDOS (which I assume is what >> you're referring to) is for the clock to tick ~18.2 times per >> second (to be more accurate, 65536 ticks per hour), in which >> case the correct
> This is incorrect. The BIOS/MSDOS clock is generated from a > 14.31818MHz crystal clock divided by 12 * 65536.
Curious...
Q> # echo 8k14318180 12 / 65536 /p | dc Q> 18.20650736 Q> #
...since that also gives ~18.2 ticks per second, thus confirming my claim that the MSDOS standard is ~18.2 ticks per second, rather than one tick every 18.2 ms as claimed by the original poster.
For reference...
Q> # echo 2k 1000 18.2 /p | dc Q> 54.94 Q> #
...18.2 ticks per second corresponds to a tick every ~55 ms, not every 18.2 ms as was claimed.
Best wishes from Riley.
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