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> >Which ones did you have in mind?  :))  
>   
> Shared IRQ polling in particular.  I haven't done any  
> code for this, but I suspect the code to clear the  
> PCI interrupt controller for the next request may be  
> different than what you would do for the 8259's on  
> the ISA bus.  
 
I'll have to go refresh my memory on shared IRQ's since I've never done  
one, but I thought the driver told the kernel upon return if it had  
serviced the IRQ.  If it had, the kernel was done with it; if not, the  
kernel called the next driver in that IRQ's chain.  
 
- Peter  
 
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