Appendix C
IRQ and I/O Port Address
The factory-set interrupt requests and I/O port addresses are listed below. Find an appropriate one to install an optional
device.
Interrupt Request
The factory-set IRQs are assigned as follows:
IRQ
Peripheral Device (Controller)
0
System timer
1
Keyboard
2
Cascaded connection
3
COM B serial port (PCI)
4
COM A serial port (PCI)
5
PCI/LPT2 parallel port
6
Floppy disk
7
LPT1 parallel port
IRQ
Peripheral Device (Controller)
8
Real-time clock
9
PCI/SCI
10
PCI
11
BMCIRQ/PCI
12
Mouse
13
Numeric processor
14
Primary IDE (CD-ROM drive)
15
PCI