Technical data

Server Software and Utilities
2-8
Assigning IRQs
The following information is important for managing server IRQ assignments.
The default setting for PCI expansion boards is Auto Select, which automatically
assigns IRQs to PCI expansion boards. If you have ISA expansion boards or you
wish to manually control PCI IRQ assignments, you must do the following to assign
IRQs to expansion slots.
1. Reboot the server and press <F2> when the DIGITAL logo screen appears.
2. Select
Advanced
at the top of the screen menu.
3. Select
PCI Configuration.
The following table shows the menu
selections.
Advanced
Menu Fields Settings Comments
PCI Configuration: [submenu]
PCI IRQ line # Disabled Disables the specific IRQ Line number.
Auto select
(1)
Automatically assigns IRQs to PCI slots.
3
4
5
7
9
10
11
12
14
15
Select a number to assign to the PCI IRQ line. If
the IRQ number is already in use, an asterick (*)
appears to the left of the line.
PCI/PNP ISA UMB Region Exclusion
Use this selection to reserve a specific block of
upper memory for ISA adapters. Press [Enter] to
display memory addresses available.
PCI/PNP ISA IRQ Resource Exclusion
Use this selection to reserve IRQ numbers for
ISA adapters. Press [Enter] to display IRQs.
(1)
Factory default
4. Follow the guidelines for PCI IRQ Assignments