Asus P1-AH1 - Manual (Page 78)

5-18 Chapter 5: BIOS setup
The IRQ Resources item becomes user-configurable only when you
set the Resources Controlled By item to [Manual].
IRQ Resources
IRQ-5 assigned to [PCI Device]
IRQ-7 assigned to [PCI Device]
IRQ-9 assigned to [PCI Device]
IRQ-10 assigned to [PCI Device]
IRQ-11 assigned to [PCI Device]
IRQ-14 assigned to [PCI Device]
IRQ-15 assigned to [PCI Device]
Select Menu
Item Specific Help
Legacy ISA for
devices compliant
with the original PC
AT bus specification,
PCI/ISA PnP for
devices compliant
with the Plug and
Play standard whether
designed for PCI or
ISA bus architecture.
IRQ Resources
IRQ-xx assigned to [PCI Device]
When set to [PCI Device], the specific IRQ is free for use of PCI/PnP
devices. When set to [Reserved], the IRQ is reserved for legacy ISA
devices. Configuration options: [PCI Device] [Reserved]
Maximum Payload Size [4096]
Allows you to set the maximum TLP payload size (in bytes) for the PCI
Express devices. Configuration options: [128] [256] [512] [1024] [2048]
[4096]