Q: How are the IRQ resources shared on the SE6 and SL6?
A: The AGP slot, built-in VGA, PCI-1, and PCI-5 share an IRQ
PCI-2, PCI-6, and AC'97 audio codec share an IRQ
PCI-3 has its own IRQ
PCI-4 and USB controllers share an IRQ
Manually assigning the IRQs is possible in the "PnP/PCI configuration" BIOS submenu.
PIRQ_0 is for AGP, built-in VGA, PCI-1 and PCI-5
PIRQ_1 is for PCI-2, PCI-6 and AC'97
PIRQ_2 is for PCI-3
PIRQ_3 is for PCI-4 and USB controllers