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IRQ Reservation Submenu of the PCI Configurations Submenu
The IRQ Reservation submenu of the PCI Configurations submenu allows the user to mark various IRQs as reserved for
use by legacy ISA devices. When an IRQ is reserved, the BIOS does not use it for embedded PCI or ISA devices.
Figure 9. IRQ Reservation Submenu
Table 9: Fields, Options and Defaults for the IRQ Reservation Submenu of the PCI Configurations Submenu
Menu Field Options Default Description
IRQ 3: • Available
• Reserved
[Available] Reserves IRQ 3. If Reserved is selected, BIOS reserves IRQ 3 for use by
legacy ISA devices and does not use it for embedded PCI/ISA devices.
IRQ 3 is removed from the IRQ bitmap in the PCI IRQ routing table.
IRQ 4: • Available
• Reserved
[Available] Reserves IRQ 4.
IRQ 5: • Available
• Reserved
[Available] Reserves IRQ 5.
IRQ 7: • Available
• Reserved
[Available] Reserves IRQ 7.
IRQ 9: • Available
• Reserved
[Available] Reserves IRQ 9.
IRQ 10: • Available
• Reserved
[Available] Reserves IRQ 10.
IRQ 11: • Available
• Reserved
[Available] Reserves IRQ 11.
F1 Help
ESC Exit
Select Item
Select Menu
-/Space
Enter
F9 Setup Defaults
F10 Save and Exit
Change Values
Select Sub-Menu
▲
Main Advanced Security Power Savings Exit
Item Specific Help
Reserve the specified
IRQ for use by legacy
ISA devices.
IRQ Reservation
PhoenixBIOS Setup Utility
IRQ 3: [Available]
IRQ 4: [Available]
IRQ 5: [Available]
IRQ 7: [Available]
IRQ 9: [Available]
IRQ 10: [Available]
IRQ 11: [Available]
Advanced Menu