English
65
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.
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
DMAs
used by PC
DMA 0
free
DMA 1
free if not used for parallel port in
Setup
DMA 2
flexible disk drive controller
DMA 3
free if not used for parallel port in
Setup
DMA 4
used to cascade DMA channels 0-3
DMA 5
free
DMA 6
free
DMA 7
free
I/O Addresses
used by PC
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
Summary of Contents for Vectra VL5 5
Page 1: ...HP Vectra VL 5 xxx User s Guide ...
Page 3: ...User s Guide ...
Page 6: ...vi English ...
Page 12: ...xii English ...
Page 13: ...1 Setting Up and Using Your PC ...
Page 28: ...1 Setting Up and Using Your PC Additional Information and Help 16 English ...
Page 79: ...4 Hewlett Packard Support and Information Services ...
Page 101: ...Regulatory Information and Warranty ...
Page 110: ...Part Number Printed in 50 D4550 90001 USA 12 96 Paper not bleached with chlorine ...