Answer to Question #273741 in Electrical Engineering for akash

Question #273741

Identify and explain the mode of data transfer in which CPU continuously monitor the status register for transferring the data. Support your answer with a neat and clean diagram.

Expert's answer

1) C. The CPU isn't concerned with the time it takes to transfer the data.

Is a false statement about DMA because CPU is the only one responsible for the calculations of time.

2) b. Device driver queries the status register to see if the device is idle

Is one of the following steps is not required for a read operation using direct I/O with polling because it doesn't query the status it just reads the status.

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