HP Vectra PC User's Guide
5 Technical Information
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IRQs, DMAs, and I/O Addresses Used
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
IRQ6
flexible disk drive controller
IRQ7
free if not used for parallel port
IRQ8
real-time clock
IRQ9
available for integrated PCI devices, if not used by an
ISA board
IRQ10
available for integrated PCI devices, if not used by an
ISA board
IRQ11
available for integrated PCI devices, if not used by an
ISA board
IRQ12
mouse
IRQ13
processor
IRQ14
integrated IDE hard disk drive controller
IRQ15
available for integrated PCI devices, if not used by an
ISA board
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
1F0h – 1F7h
integrated IDE hard disk controller
278h – 27Fh
parallel port (option 2)
2E8h – 2EFh
serial port 4
2F8h – 2FFh
serial port 2
3B0h – 3DFh
integrated video graphics controller
378h – 37Fh
parallel port (option 1)
3E8h – 3EFh
serial port 3
3F0h – 3F7h
integrated flexible disk controller
3F8h – 3FFh
serial port 1
3BCh – 3BEh parallel port (option 3)
The IRQ, DMA and I/O address mapping 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.
Summary of Contents for Vectra VE4
Page 6: ...HP Vectra PC User s Guide 1 Setting Up Your PC 6 1 Setting Up Your PC ...
Page 14: ...HP Vectra PC User s Guide 2 Using Your PC 14 2 Using Your PC ...
Page 71: ...HP Vectra PC User s Guide 4 Troubleshooting 71 4 Troubleshooting ...
Page 72: ...HP Vectra PC User s Guide 4 Troubleshooting 72 The PC Does Not Work ...
Page 75: ...HP Vectra PC User s Guide 4 Troubleshooting 75 Error Messages ...
Page 94: ...HP Vectra PC User s Guide 4 Troubleshooting 94 Software Problems ...
Page 98: ...HP Vectra PC User s Guide 4 Troubleshooting 98 Power Management Does Not Work ...
Page 102: ...HP Vectra PC User s Guide 5 Technical Information 102 5 Technical Information ...
Page 103: ...HP Vectra PC User s Guide 5 Technical Information 103 Specifications ...
Page 116: ...HP Vectra PC User s Guide 6 Getting Support 116 6 Getting Support ...
Page 124: ...HP Vectra PC User s Guide Glossary 124 Glossary ...
Page 135: ...HP Vectra PC User s Guide 7 Regulatory Information and Warranty 135 Notice for Japan ...
Page 136: ...HP Vectra PC User s Guide 7 Regulatory Information and Warranty 136 Notice for Korea ...