HP 2730p HP EliteBook 2730p Notebook PC - Maintenance and Service Guide - Page 83

System DMA specifications Specifications Hardware DMA System function DMA0 Not applicable DMA1* Not applicable DMA2* Not applicable DMA3 Not applicable DMA4 Direct memory access controller DMA5* Not applicable DMA6 Not assigned DMA7 Not assigned *PC Card controller can use DMA 1, 2, or 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. Maintenance and Service Guide 6-3