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  9. In a programmed input/output(PIO) :

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In a programmed input/output(PIO) :

The CPU uses polling to watch the control bit constantly, looping to see if device is ready

The CPU writes one data byte to the data register and sets a bit in control register to show that a byte is available

The CPU receives an interrupt when the device is ready for the next byte

The CPU runs a user written code and does accordingly

Answer: A . The CPU uses polling to watch the control bit constantly, looping to see if device is ready
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Computer MCQS

Sciences MCQS

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