2. IRQ and I/O Port Address
Express5800/53Xi, Y53Xi User's Guide
82
Chapter 4 Appendix
2.
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 IRQs are assigned at factory as follows:
IRQ
Peripheral Device (Controller)
IRQ
Peripheral Device (Controller)
0 System
timer
8 Real-time
clock
1 –
9 SCI
2 Cascade
connection
10 –
3 –
11 –
4
COM1 serial port
12
–
5 –
13 Numeric
processor
6 –
14 –
7 –
15 –
•
PIRQ and PCI Device
The factory-set PCI device interrupts are assigned as follows. You cannot change setting.
Menu item
Interrupt
PCI IRQ 16
PCI1, PCI2, USB2, Display Adapter, MEI, USB3.0
PCI IRQ 17
PCI IRQ 18
LAN2
PCI IRQ 19
SATA1, SATA2, SOL
PCI IRQ 20
LAN1
PCI IRQ 21
–
PCI IRQ 22
Audio
PCI IRQ 23
USB1