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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.IRQAssignmentDefaults
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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."