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Write short note on Programmed I/O
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There are three modes of transfer for data, commands and status as follows:

  1. Programmed IO
  2. Interrupt driven IO
  3. Direct memory access
  • Programmed I/O is implicated to data transfers that are initiated by a CPU, under driver software control to access Registers or Memory on a device.

  • With programmed I/O, data …

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