Studying for the A+, Network+ or Security+ exams? Get over 2,600 pages of FREE study guides at CertiGuide.com!
Join the PC homebuilding revolution! Read the all-new, FREE 200-page online guide: How to Build Your Own PC!
NOTE: Using robot software to mass-download the site degrades the server and is prohibited. See here for more.
Find The PC Guide helpful? Please consider a donation to The PC Guide Tip Jar. Visa/MC/Paypal accepted.
Take a virtual vacation any time at DesktopScenes.com - view my art photos online for FREE in either Flash or HTML!
Interested in current events? Read and share your opinions on news and topics of interest at CurEvents.com!

[ The PC Guide | Systems and Components Reference Guide | Motherboard and System Devices | System Resources | System Configuration ]

Device Resource Usage Summary

The table below contains a summary line for each of the major device types in a typical PC, showing the major resources that they typically use. It is a summary table containing the information from the summary tables for IRQ, DMA channel and I/O address usage. You can use this as a handy quick reference when looking to add a new device to your PC, or to assist in debugging a resource problem. Circle or highlight the devices you currently have and the resources they are using, and then you'll be able to see at a glance what resources are still available or possible ways that you could shuffle assignments to fit in a new peripheral.

Note that the resources listed below are a guideline, and aren't the hard and fast rule for all devices; consult your manual to see the exact resources used by your hardware. The entries in bold represent the default resource usage in a typical PC; entries in regular text are optional resource allocations, or resources used by optional or non-standard devices:

Device Type

Device

IRQs

DMA Channels

I/O Addresses

System

System reserved

0, 2, 8, 13

0, 4

000-0FFh (except 060h and 064h) and 100-12Fh and 20C-20Dh and 270-277h

PCI devices

9, 10, 11, 12

 

(depends on device)

Serial Ports

COM1

4

 

3F8-3FFh

COM2

3

 

2F8-2FFh

COM3

2/9, 4, 5, 7

 

3E8-3EFh

COM4

2/9, 3, 5, 7

 

2E8-2EFh

Parallel Ports

LPT1

7

1, 3 (if ECP)

378-37Fh, 3BC-3BFh

LPT2

5, 7

1, 3 (if ECP)

278-27Fh, 378-37Fh

LPT3

5

1, 3 (if ECP)

278-27Fh

Input Devices

Keyboard controller

1

 

060h and 064h (shared with PS/2 mouse)

PS/2 mouse

12

 

060h and 064h (shared with keyboard)

Joystick port

   

200-207h

Storage

Floppy disk controller

6

2

3F0-3F7h

Primary IDE controller

14

 

1F0-1F7h and 3F6-3F7h

Secondary IDE controller

15, 10

 

170-177h and 376-377h

Tertiary IDE controller

11, 12

 

1E8-1EFh and 3EE-3EFh

Quaternary IDE controller

10, 11

 

168-16Fh and 36E-36Fh

SCSI host adapter

9, 10, 11, 12, 14, 15

1, 3, 5

130-14Fh, 140-15Fh, 220-23Fh, 330-34Fh, 340-35Fh

Tape accelerator card

3, 4, 5, 6, 7

1, 2, 3

360h, 370h, 3E0h, 3F0h

Old PC/XT hard disk controller

5

3

320-327h

Video

VGA video card

11, 12

 

3B0-3BBh and 3C0-3DFh

EGA video card

2/9

 

3C0-3CFh

Modems

Modem

2/9, 3, 4, 5, 7

1, 3 (voice modems)

(uses COM port)

Sound cards

Sound card

3, 4, 5, 7, 9, 10, 11, 12

(1, 3) and
(5, 6, 7)

(220-22Fh, 240-24Fh, 260-26Fh, 280-28Fh) and (300-301h, 330-331h) and 388-38Bh

Networking

Non-NE2000 network card

3, 4, 5, 7, 9, 10, 11, 12, 15

1, 3, 5, 6, 7

240-243h, 260-263h, 280-283h, 2A0-2A3h, 300-303h, 320-323h, 340-343h, 360-363h

NE2000 network card

3, 4, 5, 7, 9, 10, 11, 12, 15

1, 3, 5, 6, 7

240-25Fh, 260-27Fh, 280-29Fh, 2A0-2BFh, 300-31Fh, 320-33Fh, 340-35Fh, 360-37Fh

Next: Resource Conflicts and Conflict Resolution


Home  -  Search  -  Topics  -  Up

The PC Guide (http://www.PCGuide.com)
Site Version: 2.2.0 - Version Date: April 17, 2001
© Copyright 1997-2004 Charles M. Kozierok. All Rights Reserved.

Not responsible for any loss resulting from the use of this site.
Please read the Site Guide before using this material.
Google
Web The PC Guide