[linux-audio-user] Is everyone sick of interrupts yet?

[Mark Knecht]

Florian Schmidt wrote:
> On Tue, 28 Sep 2004 09:57:15 -0700
> Mark Knecht <mknecht at controlnet.com> wrote:
> 
> 
>>One last little sickening detail I forgot to add before. Sorry for
>>doing it now.
>>
>>In the older 'compatibility model' we knew the 'prioity of the
>>interrupt from the interrupt number:
>>0,1,8,9,10,11,12,13,14,15,3,4,5,6,7. It was hardwired.
> 
> 
> Hi,
> 
> i welcome your chiming in because now you got me confused :) 
> 
> http://roht.informatik.uni-halle.de/~ladischc/pic_priorities.html
> 
> That page says one can change the irq prios directly in the PIC. So, are
> they hardwired now, or not?
> 
> Flo
> 
> 
Florian,
    It may be possible to change the priorities in the the old PIC 
model. I do not know of anyone that actually does it nor do I know what 
the real world implications of doing it might be.

    It is my understand that in a 'IBM Compatible PC' that the interrupt 
priorities are never changed. I suppose it's possible that the 
capability exists to do so but that no one really uses it.

    I do know that the ability to change the priorities is considered 
one advantage of the newer APIC model.

    Of course, I could be quite wrong!! Take it all with a grain of salt!

Cheers,
Mark