Question
Download Solution PDFDirect-Memory Access channel (DMA) facilitates data to move in and out of the system
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFDirect Memory Access:
- 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 facilitates data to move in and out of the system without programme intervention.
- It is implemented by using 8257 DMA controller
Last updated on Jul 2, 2025
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