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IRQ Assignments: Dell Dimension XPS Dxxx Systems
IRQ Assignments: Dell™ Dimension™ XPS Dxxx Systems
| IRQ Line |
System Resource |
IRQ Line |
System Resource |
| IRQ0 |
System timer |
IRQ8 |
RTC |
| IRQ1 |
Keyboard buffer |
IRQ9 |
Available2 |
| IRQ2 |
Enables IRQ8 through IRQ15 |
IRQ10 |
Available |
| IRQ3 |
Available1 |
IRQ11 |
Default PCI IRQ3 |
| IRQ4 |
Serial port |
IRQ12 |
Mouse port |
| IRQ5 |
Available |
IRQ13 |
Math coprocessor |
| IRQ6 |
Diskette/tape drive
controller |
IRQ14 |
Primary EIDE channel |
| IRQ7 |
Parallel port |
IRQ15 |
Secondary EIDE channel |
| 1 |
IRQ3 is available provided that no
other device in the computer (such as a modem) is using
COM2 or COM4. |
| 2 |
IRQ9 is available to PCI cards only. |
| 3 |
The PCI IRQ is assigned to an
available IRQ line after all ISA expansion cards have
been configured. If an ISA expansion card is configured
for IRQ11, the PCI IRQ is assigned to another available
IRQ line. |
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