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

Define Twisted Pair Cables , Twisted pair cables comes in two appearance :...

Twisted pair cables comes in two appearance : Unshielded twisted pair cable : UTP : UTP cables is the most common types of telecommunication medium used today. Its frequency range

IF.ELSE Statement of python , Conditional constructs are used to integrate ...

Conditional constructs are used to integrate decision making into programs. The outcome of this decision making determines the series in which a program will execute instructions.

What is a font, Question 1 What is a desktop? Explain the Windows XP deskt...

Question 1 What is a desktop? Explain the Windows XP desktop? Question 2 How does a flash drive work? Question 3 Write the procedure for creating Macro Question 4 E

Flowchart looping, create a flowchart showing average score for the 3 quizz...

create a flowchart showing average score for the 3 quizzes assume that there are 3 sections each having 5 students the only valid number to be entered is 1-100 for the quizzes shou

What is packet switching? explain, Question 1 What are the five subscriber...

Question 1 What are the five subscriber-related signaling functions performed by the operator? Question 2 Compare Microprogrammed control and Hard-wired control Que

Build heap operation, prove that the build heap operation is O(N)

prove that the build heap operation is O(N)

What is deadlock, explain deadlock procedure.

explain deadlock procedure.

Array, Array: Array  :  In programming, when large amount of related d...

Array: Array  :  In programming, when large amount of related data needs to be processed and each data element is stored with different a variable name, it becomes very diffic

Explain popular way commonly used to evaluate interfaces, Question: Usi...

Question: Using a questionnaire is a popular way commonly used to evaluate interfaces. (a) Describe advantages of using questionnaires as a means to evaluate interfaces.

Execute a command in operating system, Execute a command in operating syste...

Execute a command in operating system: In order to execute a command OS does the following steps:   It accepts a command from a user through mouse clicks or from t

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