Answer:
Explanation:
a. To initiate a DMA transfer, the CPU first sets up the DMA registers, which contain a pointer to the source of a transfer, a pointer to the destination of the transfer, and a counter of the number of bytes to be transferred. Then the DMA controller proceeds to place addresses on the bus to perform transfers, while the CPU is available to accomplish other work.
b. Once the entire transfer is finished, the DMA controller interrupts the CPU.
c. Both the CPU and the DMA controller are bus masters. A problem would be created if both the
CPU and the DMA controller want to access the memory at the same time. Accordingly, the CPU should be momentarily prevented from accessing main memory when the DMA controller seizes the memory bus. However, if the CPU is still allowed to access data in its primary and secondary caches, a coherency issue may be created if both the CPU and the DMA controller update the same memory locations.
Answer:
man, just got rick rolled brb going to cry
Explanation:
Answer: A very small, portable, solid-state hard drive that can be inserted into a USB port for storage and retrieval of data. Also Trademark, ThumbDrive, JumpDrive . Also called flash memory drive, thumb drive, USB drive.
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