DMA Chart
The DMA (Direct Memory Access) is a data transfer method used by some I/O cards. A DMA channel is a data bus line to transfer data in and out of main memory, directly to the DMA I/O card, by passing the CPU from controlling the action. This usually speeds up the over all speed of the PC.
XT 8 BIT ISA BUS
| CHANNEL | FUNCTION |
| 0 | Dynamic Memory Refresh |
| 1 | Unassigned or SDLC |
| 2 | Floppy Disk Controller |
| 3 | Hard Disk Controller |
16 BIT ISA, EISA, MCA BUS
| CHANNEL | FUNCTION |
| DMA CONtrOLLER #1 | |
| 0 | Dynamic Memory Refresh |
| 1 | Unassigned or SDLC |
| 2 | Floppy Disk Controller |
| 3 | Unassigned |
| DMA CONtrOLLER #2 | |
| 4 | First DMA Controller |
| 5 | Unassigned |
| 6 | Unassigned |
| 7 | Unassigned |
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.
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.
