HP CQ41-217TU, CQ41-205TX, CQ41-204TX manual System DMA specifications, Hardware DMA System function

Specifications

System DMA specifications

Hardware	DMA System function
DMA0	Reserve
DMA1	Reserve
DMA2	Reserve
DMA3	Reserve
DMA4	Direct memory access controller
DMA5	Reserve
DMA6	Reserve
DMA7	Reserve

System interrupt specifications (for models with discrete graphics subsystems)

Hardware IRQ	System function
IRQ1	Standard PS/2 Keyboard
IRQ12	PS/2 Compatible Mouse
IRQ13	Numeric data processor
IRQ16	High Definition Audio Controller
IRQ16	Standard OpenHCD USB Host Controller
IRQ16	Standard Opened USB Host Controller
IRQ17	PCI standard PCI-to-PCI bridge
IRQ17	Standard Enhanced PCI to USB Host Controller
IRQ18	Broadcom 802.11g Network Adapter
IRQ18	PCI standard PCI-to-PCI bridge
IRQ18	PCI standard PCI-to-PCI bridge
IRQ18	Standard OpenHCD USB Host Controller
IRQ18	Standard OpenHCD USB Host Controller
IRQ19	High Definition Audio Controller
IRQ19	PCI standard PCI-to-PCI bridge
IRQ19	Realtek RTL8102E/RTL8103E Family PCI-E Fast Ethernet NIC (NDIS 6.20)
IRQ19	Standard Enhanced PCI to USB Host Controller
IRQ22	Standard AHCI 1.0 Serial ATA Controller
IRQ(-2)	ATI Mobility Radeon HD 4330 Series
IRQ81-190	Microsoft ACPI-Compliant System

6–6 Maintenance and Service Guide