Irq assignment conflicts – Dell PowerEdge C1100 User Manual
Page 113
Troubleshooting Your System
113
13 Replace processor 1 with processor 2. See "Installing the Processor" on
14 Repeat step 9 through step 11.
If you have tested both the processors and the problem persists, the system
board is faulty. See "Getting Help" on page 123.
IRQ Assignment Conflicts
Most PCI devices can share an IRQ with another device, but they cannot use
an IRQ simultaneously. To avoid this type of conflict, see the documentation
for each PCI device for specific IRQ requirements.
Table 4-1. Assignment Specific IRQ Requirements
IRQ Line
Assignment
IRQ Line
Assignment
IRQ0
System timer
IRQ8
Real-time clock
IRQ1
Keyboard controller IRQ9
ACPI functions
(used for power
management)
IRQ2
Interrupt controller
1 to enable IRQ8
through IRQ15
IRQ10
Available
IRQ3
Default for COM2 IRQ11
Available
IRQ4
Default for COM1 IRQ12
Available
IRQ5
Remote access
controller
IRQ13
Math coprocessor
IRQ6
Reserved
IRQ14
IDE CD drive
controller
IRQ7
Reserved
IRQ15
Available
book.book Page 113 Tuesday, February 26, 2013 11:33 AM