HP Vectra XA 5/xxx HP Vectra XA 5/XXX Series 5 PC Minitower User’s Gu - Page 63

3 Troubleshooting Your PC Technical Information IRQs, DMAs, and I/O Addresses Used by Your PC IRQs used by 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. DMAs used by PC I/O Addresses 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 IRQ6 flexible disk drive controller IRQ7 free if not used for parallel port IRQ8 real-time clock IRQ9 available for PCI devices, if not used by ISA board IRQ10 available for PCI devices, if not used by ISA board IRQ11 available for PCI devices, if not used by ISA board IRQ12 mouse IRQ13 co-processor IRQ14 integrated IDE hard disk drive controller IRQ15 free if not used by second IDE controller DMA 0 DMA 1 DMA 2 DMA 3 DMA 4 DMA 5 DMA 6 DMA 7 free free if not used for parallel port in Setup flexible disk drive controller free if not used for parallel port in Setup used to cascade DMA channels 0-3 free free free 170h - 177h, 376h IDE secondary channel 1F0h - 1F7h, 3F6h IDE primary channel 278h - 27Fh (and 3A8h) parallel port 2E8h - 2EFh serial port 2F8h - 2FFh serial port 370h - 371h integrated I/O controller 378h - 37Fh parallel port 3B0h - 3DFh (3B0-3BB,3O0-3DF) integrated video graphics controller 3E8h - 3EFh serial port 3F0h - 3F5h, 3F7h integrated flexible disk controller 3F8h - 3FFh serial port 496h - 497h HP reserved 678h - 67Bh parallel port if ECP mode is selected 778h - 77Bh parallel port if ECP mode is selected English 53