User Account

All Pages

about execution cycle, Basic Computer Science

Assignment Help:
One time a program is in memory it has to be executed. To do this, each instruction must be appeared at, decoded and acted upon in turn until the program is finished. This is accomplished by the use of what is termed the ''instruction execution cycle'', which is the cycle by which each instruction in revolve is processed. However, to make sure that the execution proceeds easily, it is also necessary to synchronize the activities of the processor.
To go on the events synchronized, the clock located within the CPU control unit is used. This creates regular pulses on the system bus at a specific frequency, so that each pulse is an equal time subsequent the last. This clock pulse frequency is related to the clock rate of the processor - the higher the clock speed, the shorter the time between pulses. Actions only take place when a pulse is detected, so that commands can be kept in time with each other across the entire computer unit.
The instruction execution cycle can be undoubtedly divided into three different components, which will now be appeared at in more detail.
Fetch Cycle
The fetch cycle gets the address required from memory, stores it in the instruction register, and moves the program counter on one so that it points to the next instruction.
Decode Cycle
in it, the control unit ensures the instruction that is now stored within the instruction register. It concludes which opcode and addressing mode have been used, and as such what actions need to be carried out so as to execute the instruction in question.
Execute Cycle
the definite actions which occur during the execute cycle of an instruction depend on both the instruction itself, and the addressing mode specified to be used to access the data that may be involved. Though, four main groups of actions do exist, which are discussed in full later on.

Related Discussions:- about execution cycle

System software, Name and explain the classifications of computers

Name and explain the classifications of computers

Write short notes on joint fiction reserve, QUESTION (i) Write short no...

QUESTION (i) Write short notes on each of the following: a) Shelf reading b) Joint Fiction Reserve c) London and South-Eastern Library Region d) Document access

Electronic educational resources, ELECTRONIC EDUCATIONAL RESOURCES: In...

ELECTRONIC EDUCATIONAL RESOURCES: In the present era, you can get access to a large number of electronic educational resources through the web. These resources may be on diffe

Basic computer organisation, Explain for assignment with this title

Explain for assignment with this title

Characterizations of artificial intelligence, Characterizations of Artifici...

Characterizations of Artificial Intelligence Artificial Intelligence is a typical science to describe, because it has fuzzy borders with, psychology, computer science, mathemat

Computer organisation, What is the key characteristic of ROM?

What is the key characteristic of ROM?

Cppm, sum of first 100 integers

sum of first 100 integers

Database, #after writing the script of rebuilting indexed on db server it g...

#after writing the script of rebuilting indexed on db server it gave output command executed succesfully does this mean i m done

Omputer applications 2, true or false-- most designs of a desktop publishin...

true or false-- most designs of a desktop publishing document needs to follow clear, specific rules pertaining to design

Ms-powerpoint presentation for promoting national parks, Ms-PowerPoint Pres...

Ms-PowerPoint Presentation for Promoting National Parks You have been hired by Tourism Department to make a presentation to the travel agents from different countries. Design

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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