Application Conflicts

Some applications can leave unnecessary files or data behind after they are deleted from your system. Device drivers can also create application errors. If application errors occur, see your application device driver or operating system documentation for troubleshooting information.

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 3-1. IRQ Assignment Defaults

IRQ Line

Assignment

IRQ0

System timer

 

 

IRQ1

Keyboard controller

 

 

IRQ2

Interrupt controller 1 to enable IRQ8 through IRQ15

 

 

IRQ3

Serial port 2 (COM2 and COM4)

 

 

IRQ4

Serial port 1 (COM1 and COM3)

 

 

IRQ5

Available

 

 

IRQ6

Diskette drive controller

 

 

IRQ7

Parallel port

IRQ8

Real-time clock

 

 

IRQ9

ACPI functions (used for power management)

 

 

IRQ10

Available

 

 

IRQ11

Available

 

 

IRQ12

PS/2 mouse port unless the mouse is disabled through the System Setup program

 

 

IRQ13

Math coprocessor

 

 

IRQ14

Available

 

 

IRQ15

Available

NOTE: For the full name of an abbreviation or acronym used in this table, see "Abbreviations and Acronyms."

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Dell 1600SC manual Application Conflicts, IRQ Assignment Conflicts, IRQ Assignment Defaults, IRQ Line Assignment