Question: Explain the main inefficiency of programmed I/O. Explain how interrupt-driven I/O makes input/output more efficient than using programmed I/O. Finally, explain how direct memory access

  1. Explain the main inefficiency of programmed I/O. Explain how interrupt-driven I/O makes input/output more efficient than using programmed I/O. Finally, explain how direct memory access (DMA) improves efficiency even more.

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