THE COMMON DEVICE CHART
Most commonly used devices in a PC use an IRQ, Memory address and or a DMA Direct Memory Access channel. When installing a new device you need to read the documentation to insure you are properly configuring you device to work with your PC.
Note: Any other device that is using the same IRQ for example will conflict and lock up your computer. Be careful.
| Device | IRQ | I/O address | Memory address | DMA |
| COM1 | 4 | 3F8-3FF | * | * |
| COM2 | 3 | 2F8-2FF | * | * |
| LPT1 | 7 | 378-37F | * | * |
| LPT2 | 5 | 378-27F | * | * |
| IF LPT3 EXISTS, THEN: | ||||
| LPT1 | 7 | 3BC-3BE | * | * |
| LPT2 | 5 | 378-37A | * | * |
| LPT3 | * | 278-27A | * | * |
| XT HD CONTROLER | 5 | 320-32F | C800:0000-3FFF | 3 |
| AT HD CONTROLER | 14 | 1F0-1F8 or 3F0-3F7 |
* | * |
| FLOPPY CONTROLER | 6 | 1F0-1F8 or 3F0-3F7 |
* | 2 |
| TAPE CONTROLER | 5 | 280-28F | * | 3 |
| EGA /VGA | 2 | 3C0-3CF | A000:0000-FFFF or B000:0000-FFFF |
0 |
| CGA | * | 3D0-3DF | B800:0000-3FFF | 0 |
| MONOCHROME | * | 3BO-3BF | B000:0000-0FFF | 0 |
| HERCULES CARD | * | 3B4-3BF | B000:0000-7FFF or B800:0000-7FFF |
* |
This is meant to be a general guide to fixing some computer problems.
There are to many programs, devices, and other factors to list every
single problem that could exist. If you have any questions about using
this guide, or your problem isn't listed on our troubleshooter, please
call us or email us and we'll be happy to help.
Our online troubleshooter is meant for informational purposes only. By using this guide you understand Quick Connect cannot be held responsible for any data loss related to using this guide. Please call us for any questions or help you need if your issue is of a critical nature BEFORE using our troubleshooter.
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