HP 6820s HP Compaq 6820s Notebook PC - Maintenance and Service Guide - Page 93
System interrupt specifications, Hardware IRQ, System function
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System interrupt specifications Hardware IRQ System function IRQ0 IRQ1 System timer Standard 101-/102-Key or Microsoft® Natural Keyboard IRQ2 Cascaded IRQ3 Intel 82801DB/DBM USB2 Enhanced Host Controller-24CD IRQ4 COM1 IRQ5* Conexant AC-Link Audio Intel 82801DB/DBM 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* Intel USB UHCI controller-24C2 Intel 82852/82855 GM/GME Graphic Controller Realtek RTL8139 Family PCI Fast Ethernet Controller IRQ11 Intel USB EHCI controller-24CD Intel USB UHCI controller-24C4 Intel USB UHCI controller-24C7 Intel Pro/Wireless 2200BG TI OHCI 1394 host controller TI PCI1410 CardBus controller IRQ12 Synaptics PS/2 TouchPad IRQ13 Numeric data processor IRQ14 Primary IDE channel IRQ15 Secondary IDE channel *Default configuration; audio possible configurations are IRQ5, IRQ7, IRQ9, IRQ10, or none. NOTE: ExpressCards may assert IRQ3, IRQ4, IRQ5, IRQ7, IRQ9, IRQ10, IRQ11, or IRQ15. Either the infrared or the serial port may assert IRQ3 or IRQ4. System interrupt specifications 85