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State the various types of data transfer techniques. Explain DMA in detail. Or Explain the DMA based data transfer techniques for I/O devices?
written 7.8 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 2.5 years ago
computer organization and architecture
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written 2.5 years ago by gravatar for teamques10 teamques10 ★ 65k

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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written 7.8 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 5.1 years ago

There are three modes of transfer for data, commands and status as follows:

1) Programmed IO

2) Interrupt driven IO

3) Direct memory access

Direct memory access

  • DMA is a form of I/O in which a special module, called a DMA module, controls the exchange of data between main memory …

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