DMA CONTROLLER
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The involvement of the processor for the operation
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The method of accessing the I/O devices
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The amount of data transfer possible
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None of the mentioned
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Detailed explanation-1: -In summary, DMA and Interrupt mode are two different methods of handling I/O operations. DMA is faster and more efficient as it does not involve the processor in the transfer of data, while Interrupt mode involves the processor in the transfer of data.
Detailed explanation-2: -DMA represents Direct Memory Access. It is a hardware-controlled data transfer method. An external device can control data transfer. The external device creates address and control signals that are needed to control data transfer.
Detailed explanation-3: -Explanation: DMA is an interface that provides i/o transfer of data directly to and from the memory unit and the peripheral. In this technique, an external device is used to control data transfer.
Detailed explanation-4: -DMA interrupts Interrupts provide indication of internal state changes of the DMA channel and the DMA unit as well. Each channel has its own separate interrupt.
Detailed explanation-5: -This set of Computer Organization and Architecture Multiple Choice Questions & Answers (MCQs) focuses on “Direct Memory Access”. Explanation: DMA is an approach of performing data transfers in bulk between memory and the external device without the intervention of the processor.