- AGP and PCI-1 share an IRQ
- PCI-2 and PCI-3 share an IRQ
- PCI-4 , PCI-6 and USB controller-1 share an IRQ
- PCI-5 and HPT 370 Chip share an IRQ
Manually assigning the IRQs is possible in BIOS "PnP/PCI
configuration" submenu,
- PIRQ_0 is for AGP and PCI-1
- PIRQ_1 is for PCI-2 and PCI-3.
- PIRQ_2 is for PCI-5 and HPT 370 Chip.
- PIRQ_3 is for PCI-4, PCI-6 and USB controller-1.
PS. The IRQ of USB controller-2 is arbitrated by ICH2 automaticaly
and can't be manually assigned to a specific one.
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