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Maintenance and Service Guide 6–11
Table 6-8
System Interrupts
Hardware IRQ System Function
IRQ0 System timer
IRQ1 Quick Launch buttons
IRQ2 Cascaded
IRQ3 USB2 Enhanced Host Controller—24CD
IRQ4 COM1
IRQ5* Conexant AC—Link Audio
SMBus Controller—24C3
Data Fax Modem with SmartCP
IRQ6 Diskette drive
IRQ7* Parallel port
IRQ8 System CMOS/real-time clock
IRQ9* Microsoft ACPI-compliant system
IRQ10* USB UHCI controller—24C2
GM/GME Graphic Controller
Realtek RTL8139 Family PCI fast Ethernet Controller
IRQ11 USB EHCI controller—24CD
USB UHCI controller—24C4
USB UHCI controller—24C7
Pro/Wireless 2200BG
TI OHCI 1394 host controller
TI PCI1410 CardBus controller
*Default configuration
✎
ExpressCard may assert IRQ3, IRQ4, IRQ5, IRQ7, or IRQ20.