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

Analogue to digital converter, Analogue to digital converter: In an ADC...

Analogue to digital converter: In an ADC a range of input values must correspond to a unique digital word.  The type of code used depends on the system but here only binary cod

Computerised systems, Computerised Systems : You would have realized by no...

Computerised Systems : You would have realized by now that computing systems are most useful for manipulating information. Any organisation and management of information basically

Internal storage, Internal Storage: Internal storage is also known as ...

Internal Storage: Internal storage is also known as main, primary, or (for historical reasons) core storage, or, memory. It is used to hold those instructions and data require

Mis implementation plan for university, what is mis implementation plan for...

what is mis implementation plan for university?

Hotel database, Create a database,show all ojectives and give a fruitful in...

Create a database,show all ojectives and give a fruitful introduction and also state how it will be implemented

Number system, convert the following in to binary 108

convert the following in to binary 108

Classification of computers, Classify computer systems according to capacit...

Classify computer systems according to capacity. How they are different from computers according to the classification of technology. Provide comparative

Algorithm - programming language, Algorithm : Once a problem has been defi...

Algorithm : Once a problem has been defined precisely, a procedure or process must be designed to produce the required output from the given input. Since a computer is a machine t

CAI, explain CAI pitfalls

explain CAI pitfalls

Stub cables, Stub cables: The stub cables are for bi-directional data m...

Stub cables: The stub cables are for bi-directional data movement between LRU and current mode coupler.  The stub cables also supply power from the LRUs to the current couplers

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