> > b) why do we use the 8254?
>
> As a source of the system time tick. We could probably use the RTC
> periodic interrupt instead, but HZ got fixed at 100 on i386 long time ago
> and the best approximation we can get from the RTC is 128 ;-) as it only
> allows powers of 2. Alphas use 1024 for HZ so they do not suffer from
> this problem.
This 100 Hz dependency ought to be broken. And the time is now -
in a development kernel. If userspace breaks let it break, the fix
cannot be far away considering that alpha systems works just fine.
Helge Hafting
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