Question: Subject Name is Microprocessor and Architecture Q4. A) What is DMA? How DMA controller (8237) accomplish DMA transfer between memory and I/O devices? B) Dynamic

Q4. A) What is DMA? How DMA controller (8237) accomplish DMA transfer

Subject Name is Microprocessor and Architecture

Q4. A) What is DMA? How DMA controller (8237) accomplish DMA transfer between memory and I/O devices? B) Dynamic RAM (DRAM) retains data for only a short period (usually 2-4 ms) creating problems for the memory system designer. What type of mechanism is required to overcome this problem in DRAMs?

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