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What is the need of DMA? Explain the DMA based data transfer techniques for I/O devices.
written 7.8 years ago by gravatar for teamques10 teamques10 ★ 70k modified 3.8 years ago by gravatar for Sharad Sharad • 160
computer organization and architecture
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written 3.8 years ago by gravatar for Sharad Sharad • 160

Data Transfer Techniques

• Data transfer between CPU and the I/O devices may be done in any of the three possible ways:

  1. Programmed I/O.

  2. Interrupt- initiated I/O.

  3. Direct memory access (DMA).

1. Programmed I/O: • It is due to the result of the I/O instructions that are written in the …

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