HP Vectra VE 5/series 2 - Manual (Page 98)

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
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