[ The PC Guide | Systems and Components Reference Guide | Motherboard and System Devices | System Resources | Direct Memory Access (DMA) Channels | DMA Channel Details By Number ]

DMA2

Channel Number: 2

Bus Line: 8/16-bit

Typical Default Use: Floppy disk controller.

Other Common Uses: Tape accelerator cards.

Description: This DMA channel is used on virtually every PC for the floppy disk controller. As such, it is usually not offered as an option for use by most peripherals. Some do offer it as an option however. In particular, tape accelerator cards often offer the use of DMA2 as an option. This is probably because these cards are used for tape drives that run off the floppy interface, and many of them can be set to drive floppy disks themselves.

Conflicts: DMA2 is not often a source of conflicts, as long as you remember not to put any other devices on it if you have a floppy disk controller in your system (which almost everyone does). Beware tape accelerator cards that default to DMA2 for their channel assignment.

Next: DMA3

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