HP Presario CQ20-100 Compaq Presario CQ20 Notebook PC - Maintenance and Servic - Page 78

System interrupt specifications - series

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System interrupt specifications Specifications Hardware IRQ System function IRQ0 System timer IRQ1 Standard 101-/102-Key or Microsoft® Natural Keyboard IRQ8 System CMOS/real-time clock IRQ12 Synaptics PS/2 TouchPad IRQ13 Numeric data processor IRQ16 Intel ICH9 Family USB universal Host Controller 2937 Mobile Intel 4 Series Express Chipset Family IRQ17 High Definition Audio Controller Intel ICH9 Family USB universal Host Controller 2938 Marvel Yukon 88E8072 PCIE-Gigabit Ethernet Controller IRQ18 Intel ICH9 Family USB universal Host Controller 2939 Intel ICH9 Family USB universal Host Controller 2936 IRQ19 Intel ICH9 Family USB2 Enhanced Controller 293C IRQ20 Intel ICH9 Family USB2 Enhanced Controller 293A Intel ICH9 Family USB universal Host Controller 2934 IRQ21 Intel ICH9M-E/M SATA AHCI Controller IRQ22 Intel ICH9 Family USB universal Host Controller 2935 *Default configuration; audio possible configurations are IRQ5, IRQ7, IRQ9, IRQ10, or none. ✎ PC Cards may assert IRQ3, IRQ4, IRQ5, IRQ7, IRQ9, IRQ10, IRQ11, or IRQ15. Either the infrared or the serial port may assert IRQ3 or IRQ4. ✎ For operating systems after Windows 2000, APIC (Advanced programming interrupt controller) is used. Maintenance and Service Guide 6-5

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Specifications
Maintenance and Service Guide
6–5
System interrupt specifications
Hardware IRQ
System function
IRQ0
System timer
IRQ1
Standard 101-/102-Key or Microsoft® Natural Keyboard
IRQ8
System CMOS/real-time clock
IRQ12
Synaptics PS/2 TouchPad
IRQ13
Numeric data processor
IRQ16
Intel ICH9 Family USB universal Host Controller 2937
Mobile Intel 4 Series Express Chipset Family
IRQ17
High Definition Audio Controller
Intel ICH9 Family USB universal Host Controller 2938
Marvel Yukon 88E8072 PCIE-Gigabit Ethernet Controller
IRQ18
Intel ICH9 Family USB universal Host Controller 2939
Intel ICH9 Family USB universal Host Controller 2936
IRQ19
Intel ICH9 Family USB2 Enhanced Controller 293C
IRQ20
Intel ICH9 Family USB2 Enhanced Controller 293A
Intel ICH9 Family USB universal Host Controller 2934
IRQ21
Intel ICH9M-E/M SATA AHCI Controller
IRQ22
Intel ICH9 Family USB universal Host Controller 2935
*Default configuration; audio possible configurations are IRQ5, IRQ7, IRQ9, IRQ10, or none.
✎
PC Cards may assert IRQ3, IRQ4, IRQ5, IRQ7, IRQ9, IRQ10, IRQ11, or IRQ15. Either the infrared or the serial port
may assert IRQ3 or IRQ4.
✎
For operating systems after Windows 2000, APIC (Advanced programming interrupt controller) is used.