Re: i386: Selectable Frequency of the Timer Interrupt

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Hi,


Vojtech Pavlik @ Tue, 12 Jul 2005 14:10:08 +0200 wrote:
(http://lkml.org/lkml/2005/7/12/122)

>On Mon, Jul 11, 2005 at 05:38:05PM -0700, George Anzinger wrote:
>> HZ  	TICK RATE	jiffie(ns)	second(ns)	 error (ppbillion)
>>  100	 1193180	10000000	1000000000	       0

>The PIT crystal runs at 14.3181818 MHz (CGA dotclock, found on ISA, ...)
>and is divided by 12 to get PIT tick rate
>	14.3181818 MHz / 12 = 1193182 Hz

What exactly is the frequency of the PIT? Many internet resources say 1193180 
(including the original post), some say 1193181, and you say 1193182 Hz.
Which one is correct? (Ignoring temperature for now..)

IMO 1193181 could be, because it matches the almost-magical number 0x1234DD.


Jan Engelhardt
-- 

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" 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.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]
  Powered by Linux