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

Geometric mean - algorithm, The geometric mean is obtained by multiplying a...

The geometric mean is obtained by multiplying all the four numbers and taking the fourth root of the product. Let x 1 ,x 2 ,x 3  and x 4  be the given four numbers then geometric

Computer definition ., what is the short and complete definition of compute...

what is the short and complete definition of computer

Keystroke logger and data-stealing, Keystroke logger and Data-stealing: ...

Keystroke logger and Data-stealing: Keystroke loggers: This is a program, once installed on the system, which intercepts the keys when entering the password or the Credit Ca

What are the goals of wap architecture, Question 1 Explain the naming conv...

Question 1 Explain the naming conventions of functions in WML scripts and also explain characteristics of functions in WML Question 2 What is WML input field? Explain WML

Flow decomposition technique to list the cycles, QUESTION (a) Consider ...

QUESTION (a) Consider the graph below, use the Flow Decomposition technique to list the cycles and paths produced.                                                (b) Pr

Operating systems, Consider the state transition diagram of Figure 3.9b. Su...

Consider the state transition diagram of Figure 3.9b. Suppose that it is time for the OS to dispatch a process and that there are processes in both the Ready state and the Ready/Su

Classification of computers, Classification of Computers DIGITAL, ANAL...

Classification of Computers DIGITAL, ANALOG AND HYBRID Computers are of three basic types – Digital, Analog, and Hybrid. Current use of the word “computer” almost a

Describe the common modeling techniques in uml, Question 1 Explain with an...

Question 1 Explain with an example the three kinds of relationships that are most important in object oriented modeling Question 2 Describe the Common Modeling techniques in

Optical disk storage and cd - rom, Optical disk storage and cd - ROM: ...

Optical disk storage and cd - ROM: Optical disk storage is relatively new alternative to magnetic storage. Digital data is burnt into the surface of a plastic disk coated with

System administration and linux/unix, Write a system using script written i...

Write a system using script written in asuitable scripting language to automate taking a basic linux server instance and provisioning it with particular applications based on its I

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