Irq assignment conflicts – Dell PowerEdge C6100 User Manual

Page 127

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Troubleshooting Your System

127

13 Replace processor 1 with processor 2. See "Installing a Processor" on

page 68.

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 143.

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

8254 timer

IRQ8

RTC

IRQ1

Keyboard controller IRQ9

SCI

IRQ2

Cascade for IRQ9

IRQ10

VGA

IRQ3

Serial port

IRQ11

USB controller

IRQ4

Serial port

IRQ12

Mouse controller

IRQ5

Free

IRQ13

Numeric data
Processor

IRQ6

Free

IRQ14

Primary IDE
controller

IRQ7

Free

IRQ15

Secondary IDE
controller

book.book Page 127 Thursday, March 4, 2010 4:38 PM

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