NEC Corporation FC-N22A Manual De Usuario
162
7.2 INTERRUPT LEVELS
The table below lists interrupt levels. Interrupt levels 0 to 23 are assigned. A smaller interrupt
level has a higher priority.
List of assignment levels
Interrupt level
Setting at shipment from factory
IRQ00
Counter/timer
IRQ01
Keyboard (PS/2)
IRQ02
Interrupt controller
IRQ03
COM 2
IRQ04
COM 1 (serial port)
IRQ05
(Not used)
IRQ06
(Not used)
IRQ07
(Not used)
IRQ08
System CMOS/realtime clock
IRQ09
Microsoft ACPI-Compliant System
IRQ10
SMBus controller
IRQ11
(Not used)
IRQ12
Touch pad
IRQ13
Math coprocessor
IRQ14
Primary IDE
IRQ15
Secondary IDE
IRQ16
Express Card/PC card bus controller/USB UHCI4 Internal GA, PCI Express Root
Port 2
Port 2
IRQ17
Wireless LAN/IEEE1394 PCI Express Root Port1
IRQ18
EHCI2/USB UHCI2/SD card
IRQ19
USB UHCI1/SATAAHCI controller
IRQ20
Internal LAN
IRQ21
USB UHCI5
IRQ22
HDA Sound
IRQ23
USB UHCI0/USB EHCI
Assignment may vary depending on whether the device is used or not by the peripheral device
setting of BIOS.
setting of BIOS.