Question

Dma? explain the dma based data transfer using dma controller

Answer 1

Once the DMA controller is granted access to the system bus by the CPU, ittransfers all bytes of data in the data block before releasing control of the system buses back to the CPU, but renders the CPU inactive for relatively long periods of time. The mode is also called "Block Transfer Mode".

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Answer 2

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DMA is a method of transferring data from the computer's RAM to another part of the computer without processing it using the CPU. Video cards that support DMA can also access the system memory and process graphics without needing the CPU.