HP Vectra XU 6/XXX HP Vectra XU 6/xxx Pc User’s Guide - d4369-90001 - Page 126

IRQs, DMAs, and I/O Addresses Used by Your PC

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5 Technical Information System Specifications IRQs, DMAs, and I/O Addresses Used by Your PC The IRQ, DMA, and I/O address mappings shown here are for a PC with a basic configuration. The resources used by your PC may vary, depending upon which accessory boards are bundled with the PC. IRQs used by PC IRQ0 IRQ1 IRQ2 IRQ3 IRQ4 IRQ5 IRQ6 IRQ7 IRQ8 IRQ9 IRQ10 IRQ11 IRQ12 IRQ13 IRQ14 IRQ15 system timer keyboard system cascade free if not used for serial port free if not used for serial port free if not used for parallel port or audio flexible disk drive controller free if not used for parallel port or audio real-time clock available for PCI, if not used by ISA board available for PCI, if not used by ISA board or audio available for PCI, if not used by ISA board free if the mouse is disabled in SETUP processor integrated IDE controller available for PCI, if not used by ISA board or secondary IDE controller DMAs used by PC DMA 0 DMA 1 DMA 2 DMA 3 DMA 4 DMA 5 DMA 6 DMA 7 free free if not used for parallel port or audio flexible disk drive controller free if not used for audio used to cascade DMA channels 0-3 free if not used for audio free free if not used for audio 114 English

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5
Technical Information
System Specifications
114
English
IRQs, DMAs, and I/O Addresses Used by Your PC
The IRQ, DMA, and I/O address mappings shown here are for a PC with
a basic configuration. The resources used by your PC may vary,
depending upon which accessory boards are bundled with the PC.
IRQs used by PC
IRQ0
system timer
IRQ1
keyboard
IRQ2
system cascade
IRQ3
free if not used for serial port
IRQ4
free if not used for serial port
IRQ5
free if not used for parallel port or audio
IRQ6
flexible disk drive controller
IRQ7
free if not used for parallel port or audio
IRQ8
real-time clock
IRQ9
available for PCI, if not used by ISA board
IRQ10
available for PCI, if not used by ISA board or audio
IRQ11
available for PCI, if not used by ISA board
IRQ12
free if the mouse is disabled in SETUP
IRQ13
processor
IRQ14
integrated IDE controller
IRQ15
available for PCI, if not used by ISA board or
secondary IDE controller
DMAs used by PC
DMA 0
free
DMA 1
free if not used for parallel port or audio
DMA 2
flexible disk drive controller
DMA 3
free if not used for audio
DMA 4
used to cascade DMA channels 0-3
DMA 5
free if not used for audio
DMA 6
free
DMA 7
free if not used for audio