🚀 go-pugleaf

In article <4348@dnlunx.pttrnl.nl> filetp@dnlunx.pttrnl.nl (Peter Filet) writes:
>I am developing an Operating System, in the Protected Mode of the i286
>processor.
>Up until now I've used the basic hardware timer interrupt (08H) to switch
>tasks. Unfortunately, this interrupt occurrs merely 18 times per second,
>which doesn't give me much flexibility in assigning time slices to a
>task.
>
>I've been told that the 8253-5 and 8254.2 controllers offer me more
>interrupts per second, thus more flexibility for task switching.
>
>Could anyone please provide me with some (detailed) info on programming
>these controllers ?

You should be very cautious of this; as I recall, the disk drive
routines in the BIOS are heavily dependent on the clock interrupt
(they use it for timing purposes).

I tried to do this a long time ago ('84?) for a real time application,
but gave up trying for this reason.

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