DMA CONTROLLER
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Either A or B
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None of the above
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Detailed explanation-1: -Can a single DMA controller perform operations on two different disks simulteneously? Explanation: The DMA controller can perform operations on two different disks if the appropriate details are known. Explanation: The controller takes over the processor’s access cycles and performs memory operations.
Detailed explanation-2: -Answer. All of the statements about DMA (Direct Memory Access) are true: DMA is an approach of performing data transfers in bulk between memory and the external device without the intervention of the processor.
Detailed explanation-3: -The DMA controller acts as a processor for DMA transfers and overlooks the entire process. C. The DMA controller has 3 registers. Explanation: all of the above statement is true regarding DMA.
Detailed explanation-4: -The DMA device can act as a bus master and can read and write physical memory. The DMA device can be used to offload the software and processors from copying large chunks of data from one place in memory to another. This DMA device supports two modes of operation: contiguous transfer and scatter-gather lists.
Detailed explanation-5: -DMA stands for Direct Memory Access. It is designed by Intel to transfer data at the fastest rate. It allows the device to transfer the data directly to/from memory without any interference of the CPU.