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

Encoders, compare encoders and multiplers

compare encoders and multiplers

Discuss the objectives of query processing, Question 1 Differentiate betwe...

Question 1 Differentiate between PL/SQL functions and procedures Question 2 Draw the diagram of logical structure of oracle database and explain it in brief Question 3 D

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

Deadlock , My question on the following link: http://www.3n33.com/upload/d...

My question on the following link: http://www.3n33.com/upload/download.php?img=1410

Unix/linux, I need someone to help me with my Unix/Linux homework.

I need someone to help me with my Unix/Linux homework.

Eeprom, Ask queswhat is the advanages of eeprom?

Ask queswhat is the advanages of eeprom?

Disk output, Disk output : You will already have decided whether to u...

Disk output : You will already have decided whether to use a hard disk or floppies for storing data. An important point of disk management is to ensure a secure method of kee

Multithread 1:1 Model, Given an operating system that supports a one – to ...

Given an operating system that supports a one – to –one relationship between user-level threads and kernel – level threads and allows one or more threads from a process to issue b

Obtain the truth table and a boolean expression, Problem 1. Convert the...

Problem 1. Convert the following number system 12.34 (8) to binary number system 23BC.0A (16) to decimal number system 456.012 (16) to Octal number system 123

Computer processing, Computer Processing: Most of the earliest compute...

Computer Processing: Most of the earliest computer memories have been based on physical elements which can exist in just one of the two states (on or off): such an element cor

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