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Specifications 6–5

System DMA specifications

System interrupt 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.

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

Marvell 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.

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