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

DMA4

Channel Number: 4

Bus Line: No

Typical Default Use: Cascade for DMA channels 5 to 7.

Other Common Uses: None; for system use only.

Description: This DMA channel is reserved for cascading the two DMA controllers on systems with a 16-bit ISA bus. It is not available for use by peripherals.

Conflicts: There should not be any conflicts on this channel; any problems with it indicate a possible system hardware failure.

Next: DMA5

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