6 pci pnp, Plug and play o/s [no, Pci latency timer [64 – Asus P4RD1-MX User Manual
Page 66: Allocate irq to pci vga [yes

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Chapter 2: BIOS setup
Plug and Play O/S [No]
When set to [No], BIOS configures all the devices in the system. When set
to [Yes] and if you install a Plug and Play operating system, the operating
system configures the Plug and Play devices not required for boot.
Configuration options: [No] [Yes]
PCI Latency Timer [64]
Allows you to select the value in units of PCI clocks for the PCI device
latency timer register.
Configuration options: [32] [64] [96] [128] [160] [192] [224] [248]
Allocate IRQ to PCI VGA [Yes]
When set to [Yes], BIOS assigns an IRQ to PCI VGA card if the card requests
for an IRQ. When set to [No], BIOS does not assign an IRQ to the PCI VGA
card even if requested.
Configuration options: [No] [Yes]
Take caution when changing the settings of the PCI PnP menu items.
Incorrect field values can cause the system to malfunction.
Advanced PCI/PnP Settings
WARNING: Setting wrong values in below sections
may cause system to malfunction.
Plug And Play O/S
[No]
PCI Latency Timer
[64]
Allocate IRQ to PCI VGA
[Yes]
Palette Snooping
[Disabled]
IRQ-3 assigned to
[PCI Device]
IRQ-4 assigned to
[PCI Device]
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]
NO:lets the BIOS
configure all the
devices in the system
YES:lets the operation
system config Plug and
Play (PnP) devices not
required for boot if
your system has a Plug
and Play operating
system.
MIDI IRQ Select [IRQ5]
Allows you to set the MIDI port IRQ address.
Configuration options: [IRQ5] [IRQ7] [IRQ10] [IRQ11]
2.4.6 PCI PnP
The PCI PnP menu items allow you to change the advanced settings for
PCI/PnP devices. The menu includes setting IRQ and DMA channel resources
for either PCI/PnP or legacy ISA devices, and setting the memory size block
for legacy ISA devices.