Hi,

basically most mobos I have seen will share IRQs. They have a 
sheme of corresponding slots devices that share IRQs, like AGP 
and PCI3, USB and PCI2, PCI4 and PCI1.

mike

On 18 Oct 2001, at 18:25, Dan Melomedman wrote:

> This brings up another question. On my Athlon motherboard (DFI
> AK76-SN), all IRQs above 9 want to be shared, the BIOS simply wants
> them shared, and the CMOS config does not have means to disable IRQ
> sharing (there are plenty of spare IRQs below IRQ9). It was said
> Windows deals with this with ACPI by reassigning IRQs to devices after
> boot. It's possible the mobo manufacturer simply assumed all of us
> will be running Windows, and did not provide any configs in CMOS setup
> for dealing with shared IRQs. My older ASUS P5A motherboard never had
> IRQ sharing problems, and by default BIOS wasn't sharing them, in
> addition the CMOS setup had a configuration menu for per slot IRQ
> assignments. That said, does your motherboard share IRQs? If it does,
> that might as well be your answer, since sharing IRQs should lower
> performance. 
> 
>