Briefly Explain Dma And Its Various Addressing Modes?

1.	Briefly Explain Dma And Its Various Addressing Modes?
Answer» The DMA or the direct memory access is a type of process in which the System bus control is accessed and CONTROLLED by an external device in PLACE of the CPU. It is primarily used for the high speed transfer of data from mass storage devices. The DMA functions by DIRECTLY transferring data to and from from the memory to the devices. The various modes of operation of the DMA are as follows: Demand MODE, Single mode, Block mode and Cascade mode. The characteristic of the demand mode is that it can transfer data until the Dreq input becomes inactive.

Answer»

The DMA or the direct memory access is a type of process in which the System bus control is accessed and CONTROLLED by an external device in PLACE of the CPU.
It is primarily used for the high speed transfer of data from mass storage devices.
The DMA functions by DIRECTLY transferring data to and from from the memory to the devices.
The various modes of operation of the DMA are as follows: Demand MODE, Single mode, Block mode and Cascade mode.
The characteristic of the demand mode is that it can transfer data until the Dreq input becomes inactive.

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