OSDev.org

1)how do we calculate CPU speed?
2)if RTc is usage of timer ..then y they use different interrupt number?
3)how many times ssytem timer interrupts per second (IRQ0)
and how many timees RTc(IRQ8)

I think u can caluculate using the combination of timer interrupt & CPU performance counter. (i'm not sure)

To calculate the performnace refer to the
Intel Architecture Software Developer's Manual Volume 3 (System Programming Guide)
under the section 2.6.6 Reading Performance -Monitoring and Time-Stamp counters

with default setting timer counter interrupts 18 times per second. But u can change this.

rgds
YogaRamanan.T

18.2 times per second, to be more precise.

Not to be picky, or anything... but that .2'll manifest itself in a largely different MHz rating in the end

Cheers,
Jeff