Central processing unit (cpu), Basic Computer Science

Central Processing Unit (CPU):

The CPU is the physical device that controls computer operations. It is considered as the 'brain' of the computer system. The CPU comprises three components: The control unit, the arithmetic/logic unit, and the main memory (main storage) All these are composed of microelectronic devices, virtually always based on silicon semiconductor technology.  

The main memory is the largest component of CPU, and is divided into individual computer words, each of which may be accessed individually by its address. All present day computers are based upon semiconductor technology, the ability to place many thousands of electronic components Within a limited area of silicon, which has been doped with carefully controlled amounts of other elements. The main memory holds program instructions and data required as the programs operate. 

The arithmetic/logic unit contains a set of registers or accumulators, individual words of very high speed storage into which words from the main storage are copied, prior to instructions being applied to them. Attached to the registers is the circuitry which carries out the few hundreds of basic operations available to the computer. In essence, when an individual instruction needs to be carried out on some word in the main storage, that word is copied into a register, the appropriate circuitry activated, and the register's contents copied back to the main location. 

The control unit extracts program instructions one at a time in the required sequence from their locations in the main storage, decodes them, and issues instructions to the main storage to access the required word, and to the arithmetic/logic unit to activate the required instruction circuitry.  

Posted Date: 10/24/2012 4:10:35 AM | Location : United States







Related Discussions:- Central processing unit (cpu), Assignment Help, Ask Question on Central processing unit (cpu), Get Answer, Expert's Help, Central processing unit (cpu) Discussions

Write discussion on Central processing unit (cpu)
Your posts are moderated
Related Questions
Mike sells on the average 15 newspapers per week (Monday – Friday). Find the probability that 2.1 In a given week he will sell all the newspapers [7] 2.2 In a given day he will sel

How would you format while loops to fufill my project write up?

product of two numbers

Problem 1. Explain the different categories of instructions. Explanation of 4 categories 2. Explain the steps to be followed for the addition of floating point numb

QUESTION (a) Outline the five main steps in the Web Design Process (b) Draw an annotated diagram explaining how data is transmitted to web servers during a standard form sub

The project designs a school computer lab with the necessary hardware and software components along with the IP address for different components. The computer lab consists of one I


In assembly language code lines have two fractions, the earliest one is the name of the instruction which is to be executed, and the next one are the parameters of the command. For

What is the difference between information technology and information systems? Describe some of the fuctions of information systems

how does one create a database in mysql