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

Determine the minimal sum of products for boolean expression, Determine the...

Determine the Minimal sum of products for the Boolean expression? Obtain the minimal sum of products for the Boolean expression f=(1,2,3,7,8,9,10,11,14,15) using Quine-McCluske

Explain the e-cheques verses credit cards in brief, Explain the E-cheques v...

Explain the E-cheques verses Credit Cards in brief. E-cheques: E-cheques are utilized for business dealing into e-commerce. Transactions of such cheques take place onto Inter

Dynamic screen sequence, Dynamic screen sequence  for a  screen can be set ...

Dynamic screen sequence  for a  screen can be set using which commands? It uses two commands:- A) Set Screen B) Call screen.

8259 PIC, plz expalain interfacing of 8259 with 8085 step wise

plz expalain interfacing of 8259 with 8085 step wise

Reading decision trees, Reading Decision Trees: However we can justifi...

Reading Decision Trees: However we can justified by see that a link between decision tree representations and logical representations that can be exploited to make it easier t

Explain session layer of osi model, Explain Session Layer of OSI Model. ...

Explain Session Layer of OSI Model. The session layer manages, establishes and terminates communication sessions. Communication sessions contain service of requests and serv

What are the advantagesof fact finding, What are the Advantagesof fact find...

What are the Advantagesof fact finding - Analyst obtains reliable data - It's possible to see exactly what is being done -  This is an inexpensive method in comparison o

Describe the features of electronic banking, Question 1: The Banking Ac...

Question 1: The Banking Act provides for banking services through interactive electronic systems. (a) Describe the features of electronic banking. (b) Show the responsibi

What is constrained-random verification, What is Constrained-Random Verific...

What is Constrained-Random Verification ? As ASIC and system-on-chip (SoC) designs continue to increase in size and complexity, there is an equal or greater increase in the si

Construct a shift register from S-R flip-flops, Construct a shift register ...

Construct a shift register from S-R flip-flops. Explain its working. Ans: S-R Flip-Flop Shift Register: Shift registers can be built through using SR flip-flops. Fig.(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