Write short note on Programmed I/O

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written 8.7 years ago by

karanbhagtani97 • 1.3k

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.
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