B-2 Interrupt Request/PCI IRQ Device/I/O Port Address Assignments
This appendix provides the Interrupt Requests (IRQs), PCI IRQ device, and I/O
port addresses that are factory assigned for this system. Use these values for
reference when installing an optional device.
Interrupt Request Assignments
Table B-1 lists the factory assigned Interrupt Requests (IRQs).
Table B-1. Interrupt Request Assignments
IRQ Peripheral Device (Controller) IRQ Peripheral Device (Controller)
0 System timer 8 Real-time clock
1 Keyboard 9 PCI/ISA/SCI
2 Cascaded connection 10 PCI/ISA
3 COM2 serial port (PCI/ISA) 11 ESMINT/PCI/ISA
4 COM1 serial port (PCI/ISA) 12 Mouse
5 PCI/ISA/LPT2 parallel port 13 Math co-processor
6 Floppy disk 14 Primary IDE (CD-ROM drive)
7 LPT1 parallel port 15