Dell PowerEdge C8000 - Manual (Page 223)

Troubleshooting 223
CAUTION: You should only perform troubleshooting and simple repairs as
authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not
authorized by Dell is not covered by your warranty. Read and follow the safety
instructions that came with the product.
If the problem is not resolved by replacing the battery, see "Getting Help"
on page 241.
NOTE: Some software may cause the system time to speed up or slow down. If the
system seems to operate normally except for the time kept in the System Setup
program, the problem may be caused by software rather than by a defective
battery.
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.
PCI IRQ pool definition is the BIOS code assigned at run time.
IRQ Line Assignment IRQ Line
Assignment
IRQ0 8254 timer IRQ8 Real-time clock
IRQ1 Keyboard controller IRQ9 PCI IRQ pool definition
IRQ2 Cascade for IRQ9 IRQ10 PCI IRQ pool definition
IRQ3 Serial port (COM2) or
PCI IRQ pool definition
IRQ11 PCI IRQ pool definition
IRQ4 Serial port (COM1) or
PCI IRQ pool definition
IRQ12 Mouse controller
IRQ5 PCI IRQ pool definition IRQ13 Processor
IRQ6 PCI IRQ pool definition IRQ14 Primary IDE controller
IRQ7 Reserved IRQ15 Secondary IDE controller