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Specifications
Maintenance and Service Guide 6–7
System interrupt specifications
System I/O address specifications
Hardware IRQ System function
IRQ1 Standard 101-/102-Key or Microsoft Natural PS/2 Keyboard with HP QLB
IRQ4 ITE consumer infrared (CIR) receiver
IRQ12 Synaptics PS/2 Port TouchPad
IRQ13 Numeric data processor
IRQ14 ATA channel 0
IRQ15 ATA channel 1
IRQ16 High-definition audio controller
IRQ16 Standard OpenHCD USB host controller
IRQ16 Standard OpenHCD USB host controller
IRQ17 SDA standard compliant SD host controller
IRQ17 Standard enhanced PCI to USB host controller
IRQ18 Standard OpenHCD USB host controller
IRQ18 Standard OpenHCD USB host controller
IRQ18 WLAN adapter
IRQ19 High-definition audio controller
IRQ19 Realtek RTL8103 Family PCI-E 10/100 Ethernet NIC (NDIS 6.0)
IRQ19 Standard enhanced PCI to USB host controller
IRQ22 Standard AHCI 1.0 serial ATA controller
IRQ23 G-sensor
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This table contains default values. The actual resource allocation is determined by the operating system.
I/O address (hex) System function (shipping configuration)
000 - 00F Direct memory access controller
000 - CF7 PCI bus
010 - 01F Motherboard resources
020 - 021 Programmable interrupt controller
02E - 02F Motherboard resources
040 - 043 System timer
060 - 060 Standard 101-/102-Key or Microsoft Natural PS/2 Keyboard with HP QLB
061 - 061 System speaker
062 - 062 Microsoft ACPI-compliant embedded controller
064 - 064 Standard 101-/102-Key or Microsoft Natural PS/2 Keyboard with HP QLB
066 - 066 Microsoft ACPI-compliant embedded controller
070 - 071 System CMOS/real-time clock
(Continued)