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

Digital, define complement?

define complement?

What is a Process and process mangemen in operating system? , A process is ...

A process is a chronological program in execution. The constituents of a process are the following: • The object program to be executed ( described the program text in UNIX) • Th

Multiple queues, I need to create mulitple queues assignment that run concu...

I need to create mulitple queues assignment that run concurrently. It is like a queue simulation with  number of checkouts with a random probability of clients, joining any one

Memory of computer, Memory : Computers store information internally as wel...

Memory : Computers store information internally as well as externally. Linked to CPU is an internal memory unit where all the instructions and data are stored. It contains the

About the faculty posts, is there any oppurtunity for a mca to teach mcasub...

is there any oppurtunity for a mca to teach mcasubjects online

DR Racket program, Hi, I''m looking for someone to help me with Computer Sc...

Hi, I''m looking for someone to help me with Computer Science ASAP. How soon are you available? Thanks! Specifically using the Racket program dealing with creating a list that will

Define Shortest-Job-First (SJF) Scheduling ?, • It is also known as Shortes...

• It is also known as Shortest-Process-Next (SPN). • Shortest-Job-First (SJF) is a non-preemptive order in which waiting job (or process) with the smallest predictable run-time-to-

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

Classes of a computer set, what are the two broad classes of a computer set...

what are the two broad classes of a computer set

Text, text graphics audio video

text graphics audio video

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