Explain dma and interrupt breakpoints, Computer Engineering

Assignment Help:

Q. Explain about DMA and Interrupt Breakpoints?

DMA interface transfers complete block of data one word at a time directly to or from memory without going through processor. When transfer is complete, DMA interface transmits an interrupt signal to processor. So in DMA processor involvement can be restricted at beginning and end of transfer that can be displayed as in figure above. However question is when should DMA take control of bus?

For this we would recall phenomenon of execution of an instruction by processor. Figure below displays five cycles for an instruction execution. Figure also displays five points where a DMA request can be responded to and a point where interrupt request can be responded to. Please note an interrupt request is acknowledged only at one point of an instruction cycle and that is at interrupt cycle.  

2496_Explain DMA and Interrupt Breakpoints.png

Figure: DMA and Interrupt Breakpoints


Related Discussions:- Explain dma and interrupt breakpoints

Computer Network, Write a short notes on transition from IPv4 to IPv6

Write a short notes on transition from IPv4 to IPv6

What is clearquest, Rational ClearQuest is a change-request management tool...

Rational ClearQuest is a change-request management tool that tracks and handles defects and change requests all through the development process. With ClearQuest, you can manage eac

War (write after read) - data hazards , WAR (write after read) - Data hazar...

WAR (write after read) - Data hazards in computer architecture: WAR (write after read) - j tries to write at destination before it is read by i , hence i  wrongly gets the n

Briefly explain the floating point representation, Briefly explain the floa...

Briefly explain the floating point representation with an example? The floating point representation has 3 fields 1.sign bit 2.siginificant bits 3.exponent For  exa

How will you allocate sub system, How will you allocate sub system? All...

How will you allocate sub system? Allocate every concurrent subsystem to hardware unit. General purpose processor or specialized functional unit as follows: Estimate per

Differentiate between the serial port and parallel port, Question: (a) ...

Question: (a) Provide types of computer systems and briefly describe each one. (b) With the help of example, explain the difference between open source software, freeware a

Show the reset and submit buttons in html, Reset and Submit are special typ...

Reset and Submit are special types of input buttons. Submit is used to send data to the server and Reset resets/clears the form.

Internal structure of agents - artificial intelligence, Internal Structure ...

Internal Structure of Agents: We have looked at agents in terms of their external influences and behaviors: they put in from the surroundings and perform rational actions to a

What is a privileged instruction, What is a privileged instruction? To ...

What is a privileged instruction? To protect the operating system of a computer from being corrupted by user programs, particular instructions can be executed only whereas the

How and what data is gathered- simulation, How and what data is gathered- S...

How and what data is gathered- Simulation To make this as realistic as possible, data is required to be gathered over a long period of time. This can be done by sensors near/i

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