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

Apple''s rbv, What''s a resource based view of Apple Corporation?

What''s a resource based view of Apple Corporation?

Embedded system, what question can be asked for embedded system

what question can be asked for embedded system

Describe gamma and its importance, Question 1 Describe HSV and CMYK color ...

Question 1 Describe HSV and CMYK color models Question 2 Describe gamma and its importance Question 3 What are the steps involved in image manipulation? Que

Simplified expression, what is the logic diagram for the Boolean expression...

what is the logic diagram for the Boolean expression x''y + xy'' + xz

Rental model, Rental model: This has come into picture as Software as...

Rental model: This has come into picture as Software as a Service (SaaS) and Platform as a Service (PaaS) models have evolved over a period of time. Here, the buyer need not

Discuss on browsers for cloud computing, Question 1 Discuss on "Platform a...

Question 1 Discuss on "Platform as a Service" Question 2 Write a note on Accounting Services Question 3 Explain the different Software clients Question 4 D

Tech ed, can you help me convert binary into decimals?

can you help me convert binary into decimals?

Desktop computer, Desktop computer: Desktop computer is popularly know...

Desktop computer: Desktop computer is popularly known as personal computer (PC). As the name suggest, it is generally small in size and fitted on the top of a desk which can b

Excel, how to use excel..

how to use excel..

Cathode ray tube monitors, Cathode Ray Tube Monitors (CRT): Monitors d...

Cathode Ray Tube Monitors (CRT): Monitors display what is going on in your computer. They can run at various resolutions. It is the part of computer which looks like a TV set.

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