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)
IRQ
Peripheral Device (Controller)
0
System timer
8
Real-time clock
1
(Keyboard)
9
PCI/SCI
2
Cascaded connection
10
Reserved
3
COM B serial port (PCI)
11
BMCIRQ
4
COM A serial port (PCI)
12
(Mouse)
5
Reserved
13
Reserved
6
Reserved
14
Primary IDE (optical disk drive)
7
Reserved
15
Reserved
Summary of Contents for Express5800/R140a-4
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