Explain working of direct memory access, Computer Engineering

Assignment Help:

Q. Explain working of Direct Memory Access?

In both programmed I/O and interrupt-driven processor is busy with executing input/output instructions and I/O transfer rate is limited by speed with which processor can test and service a device. What about a scheme that needs minimal intervention of CPU for input/output? These two types of shortcomings can be overcome with a more efficient technique called as DMA that behaves as if it has taken over control from processor.  C  Consequently the question is: why do we employ DMA interface? It is employed primarily when a large amount of data is to be transferred from I/O device to Memory.


Related Discussions:- Explain working of direct memory access

What is an adaptor class or wrapper class in c++, A class that has no funct...

A class that has no functionality of its own is an Adaptor class in C++. Its member functions hide the use of a third party software component or an object with the non-compatible

What are the defining traits of an object-oriented language, The defining t...

The defining traits of an object-oriented language are: * Encapsulation * Inheritance * Polymorphism

Show a string in assembly language, Q. Show a string in assembly language? ...

Q. Show a string in assembly language? MOV AH, 09H MOV DX, OFFSET   BUFF INT    21H Here data in input buffer stored in data segment is intended to be displayed on mo

Software, S oftware In 1970s less than 1 percent of the public could h...

S oftware In 1970s less than 1 percent of the public could have intelligently explained what "computer software " means. Nowadays most professionals and various member of the

Drawback of these electromechanical and mechanical computers, Drawback of t...

Drawback of these electromechanical and mechanical computers The basic drawback was: Inertia/friction of moving components had limited speed. The data movement usin

Determine about the raster-scan systems, Determine about the raster-scan sy...

Determine about the raster-scan systems Most of the present raster-scan systems contain a separate processor called as display processor. This processor performs graphics func

Asp.net, how work for asp.net

how work for asp.net

Instruction set for ia - 64 architecture, Q. Instruction set for IA - 64 ar...

Q. Instruction set for IA - 64 architecture? Instruction set: Architecture gives instructions for multimedia operations as well as floating point operations. Itanium supports

Expression for boolean function in standard POSform, Write the expression f...

Write the expression for Boolean function for F (A, B, C) = ∑m (1,4,5,6,7) in standard POS form.                                   Ans: f (A,B,C )= ΣM (1,4,5,6,7) in standard POS

How will you prepare problem statement, How will you prepare problem statem...

How will you prepare problem statement? Problem statement should state what is to be completed and not how it is to be executed. It should be a statement of requirements not a

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd