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The data-in register of I/O port is ____________

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The data-in register of I/O port is ____________

(a) Read by host to get input

(b) Read by controller to get input

(c) Written by host to send output

(d) Written by host to start a command

The question was posed to me in homework.

Origin of the question is I/O Subsystem in division Mass-Storage Structures of Operating System

1 Answer

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Best answer
Correct answer is (a) Read by host to get input

Explanation: None.

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