Specifications
System DMA specifications
| Hardware | DMA System function |
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| DMA0 | Not applicable |
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| DMA1* | Not applicable |
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| DMA2* | Not applicable |
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| DMA3 | Not applicable |
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| DMA4 | Direct memory access controller |
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| DMA5* | Not applicable |
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| DMA6 | Not assigned |
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| DMA7 | Not assigned |
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| *PC Card controller can use DMA 1, 2, or 5. |
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System interrupt specifications |
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Hardware IRQ | System function |
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IRQ0 | System timer |
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IRQ1 | Standard |
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IRQ8 | System |
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IRQ12 | Synaptics PS/2 TouchPad |
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IRQ13 | Numeric data processor |
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IRQ16 | Intel® ICH9 Family USB universal Host Controller 2937 |
| Mobile Intel 4 Series Express Chipset Family |
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IRQ17 | High Definition Audio Controller |
| Intel® ICH9 Family USB universal Host Controller 2938 |
| Marvel Yukon 88E8072 |
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IRQ18 | Intel® ICH9 Family USB universal Host Controller 2939 |
| Intel® ICH9 Family USB universal Host Controller 2936 |
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IRQ19 | Intel® ICH9 Family USB2 Enhanced Controller 293C |
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IRQ20 | Intel® ICH9 Family USB2 Enhanced Controller 293A |
| Intel® ICH9 Family USB universal Host Controller 2934 |
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IRQ21 | Intel® |
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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 |
