- AGP and PCI-1 share an IRQ
- PCI-2 owns independent one
- PCI-3 and ATA66 controller share an IRQ
- PCI-4, PCI-5 and USB 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
- PIRQ_2 is for PCI-3 and ATA66 controller
- PIRQ_3 is for PCI-4, PCI-5 and USB
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