Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt

dean gaudet
2005-07-14T01:14:10Z

On Wed, 13 Jul 2005, Chris Wedgwood wrote:

> On Wed, Jul 13, 2005 at 04:41:41PM -0700, dean gaudet wrote:
>
> > windows xp base rate is 100Hz... but multimedia apps can ask for
> > almost any rate they want (depends on the hw capabilities). i
> > recall seeing rates >1200Hz when you launch some of the media player
> > apps -- sorry i forget the exact number.
>
> Windows starts an additional high-speed timer as needed for this?

i don't think so -- i think it reprograms the divisor... but don't trust
me, check this doc:

http://www.microsoft.com/whdc/system/CEC/mm-timer.mspx

it goes into detail on the current and future timer support in winxp.

-dean