C. irq and i/o port address, Appendix c, Irq and i/o port address – NEC Server 140Rc-4 User Manual
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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
PCI (BMC IRQ)
3
COM B serial port (PCI)
11
BMCIRQ/PCI/ISA
4
COM A serial port (PCI)
12
Mouse
5
PCI/LPT2 parallel port (BMC IRQ)
13
Numeric processor
6
Floppy disk
14
Primary IDE (CD-ROM drive)
7
LPT1 parallel port
15
PCI
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