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
board coloring

OSI Layers: Open Systems Interconnection model is a reference model developed by International Organization for Standardization in 1984, as a conceptual structure of principles fo

Spidering or Web crawling: Spider or Web crawler is a computer program that browses the web pages of WWW in a systematic, automated manner. Search Engines use spider for gett

Problem When a data is sent across the network it is encrypted and arranged in a way that even if there is a diversion in the flow of data should not leak the data. At the rece

In this program, you are going to write a program for playing the game of Hangman. In this game, the computer will pick a word and display a sequence of blanks to be filled in; one

1. What is Evaluating Information System Investments? 2. Is IS evaluation different to evaluation of other investments? 3. What approaches are used to evaluate IS investments

i want design circuit this Buffer(LIFO).please help me

Using only the digits 1-6 how many five digit numbers can be formed? How many of these have at least a 5? How many of them have either no 5 or no 6?

Systems Software: Systems software is generally supplied by the hardware manufacturers. It includes operating systems, assemblers, compilers, and interpreters (to convert prog

The 7489 TTL Ram Device: The 7489 TTL Ram package has 64 memory cells, each cell is capable of holding a single bit of data.  The cells are organised into locations, and each l