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PCI/PNP Resource Management
IRQ and DMA Settings
The BIOS has the capability to automatically configure all of the boot and Plug & Play compatible
devices. Normally, you should set them as [Available], so that the BIOS can automatically assign
the IRQs and DMA channels. In the old days, you might assign each IRQ or DMA channel to a
Legacy ISA card, and you had to change the setting to [Reserved] to reserve IRQ/DMA for this
ISA card. This happened mostly on the ISA bus sound cards. Legacy ISA devices are compliant
with the original PC AT bus specification and require a specific interrupt / DMA channel to function
properly.
Now, ISA bus is disappeared on the motherboard, only PCI PnP devices are considered. PCI PnP
devices, on the other hand, adhere to the Plug & Play standard and can use any interrupt / DMA
channel. The IRQ/DMA assignments here are just to reserve some particular resources for them,
and you can go to Device Manager for the assignments.
CMOS Setup Utility - Copyright (C) 1985-2005, American Megatrends, Inc.
IRQ & DMA Settings
IRQ & DMA Settings
Help Item
IRQ3
[Available]
Available: Specified
IRQ4
[Available]
IRQ is available to be
IRQ5
[Available]
used by PCI/PnP
IRQ7
[Available]
devices.
IRQ9
[Available]
Reserved: Specified
IRQ10
[Available]
IRQ is reserved for
IRQ11
[Available]
use by Legacy ISA
IRQ14
[Available]
devices.
IRQ15
[Available]
DMA Channel 0
[Available]
DMA Channel 1
[Available]
DMA Channel 3
[Available]
DMA Channel 5
[Available]
DMA Channel 6
[Available]
DMA Channel 7
[Available]
↑↓←→:Move Enter:Select +/-/:Value F10:Save ESC:Exit F1:General Help
F7:Previous Values F8:Fail-Safe Defaults F9:Optimized Defaults
[Available]
CMOS Setup Utility - Copyright (C) 1985-2005, American Megatrends, Inc.
PCI/PNP Resource Management
Advanced PCI/PnP Settings
Help Item
WARNING: Setting wrong values in below sections
IRQ & DMA Settings
may cause system to malfunction.
► IRQ & DMA Settings
[Press Enter]
Plug & Play O/S
[No]
PCI Latency Timer
[64]
Allocate IRQ to PCI VGA
[Yes]
Palette Snooping
[Disabled]
PCI IDE BusMaster
[Enabled]
↑↓←→:Move Enter:Select +/-/:Value F10:Save ESC:Exit F1:General Help
F7:Previous Values F8:Fail-Safe Defaults F9:Optimized Defaults
[Press Enter]
