Pipeline and Vector Processing Q.48

48The size of the data count register of a DMA controller is 16 bits. The processor needs to transfer a file of 29,154 kilobytes from disk to main memory. The memory is byte addressable. The minimum number of times the DMA controller needs to get the control of the system bus from the processor to transfer the file from the disk to main memory is .......... .

Option : A
Explanation : Size of data count register is 16 bits
Data that can be transferred in one ti
me = 2¹⁶ bytes = 64 kilobytes
File size to be transferred = 29154 kilobytes
So, number of times the DMA controller needs to get the control is 29154/64 = 455.53 (take 456).

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