
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
9
–
1
Keyboard
10
PCI
2
–
11
PCI
3
COM B
12
Mouse
4
COM A
13
Numeric coprocessor
5
PCI
14
Primary IDE
6
Floppy disk
15
Secondary IDE
7
Parallel
16
USB
8
Real-time clock
Содержание Express 5800/120Lh
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