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System DMA specifications
Hardware DMA System function
DMA0 Not applicable
DMA1* Not applicable
DMA2* Not applicable
DMA3 Not applicable
DMA4 Direct memory access controller
System interrupt specifications (discrete)
Hardware IRQ System function
IRQ0 System timer
IRQ1 Standard PS/2 Keyboard
IRQ7 Intel 5 Series/3400 Chipset Family SMBus Controller-3B30
IRQ8 System CMOS/real time clock
IRQ12 Synaptics PS/2 Port TouchPad
IRQ13 Numeric data processor
IRQ16 Intel 5 Series/3400 Chipset Family USB Enhanced Host Controller - 3B3C
Intel 5 Series/3400 Chipset Family PCI Express Root Port 2 -3B44
Intel Management Engine Interface
Intel processor PCI Express Root Port 1 - D138
IRQ17 High Definition Audio Controller
Intel 5 Series/3400 Chipset Family PCI Express Root Port 1 -3B42
IRQ19 Intel 5 Series 4 Port SATA AHCI Controller
IRQ21 Intel® 5 Series/3400 Chipset Family USB Enhanced Host Controller - 3B34
IRQ22 High Definition Audio Controller
IRQ23 HP Mobile Data Protection Sensor
IRQ81-190 Microsoft ACPI-Compliant System
IRQ-2 ATI Mobility Radeon HD 5470
IRQ-4 Intel WiFi Link 1000 BGN
112 Chapter 6 Specifications