Question
Download Solution PDFIn a microprocessor-based system, a DMA facility is required to increase the speed of the data transfer between the
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ESE Electrical 2013 Paper 2: Official Paper
Answer (Detailed Solution Below)
Option 3 : Memory and the I/O devices
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ST 1: UPSC ESE (IES) Civil - Building Materials
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Detailed Solution
Download Solution PDF- Direct memory access (DMA) is a feature of computer systems that allows certain hardware subsystems to access main system memory (random-access memory), independent of the central processing unit (CPU).
- DMA avoids using the CPU thus allowing the CPU to attend another job
- It increases the speed of the data transfer between the memory and the I/O devices
- DMA is used when a large amount of data is to be printed out from the memory of a computer
- The problem of slow data transfer between input-output port and memory or between two memory is avoided by implementing the Direct Memory Access (DMA) technique
- It is implemented by using 8257 DMA controller
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