e.g, video monitor, printer and plotter, etc. It is mainly used to display the desired result to the user as per input instruction. It is Mainly used to display the desired results to the user. THe output sends the processed results to the user. It is a device that is used to give required information to the computer. The Computer accepts Coded information through input unit by the user. Components of a ComputerĪ computer consists of three main components The computer architecture forms the backbone for building successful computer systems. It can also be described as the logical structure of the system unit that housed electronic components. Computer architecture deals with the functional behaviour of a computer system as viewed by a programmer. It performs following tasks:Ībove figure shows the block diagram of a computer.In computer science, computer architecture is a set of disciplines that describes the part of computer system and their relations. The control unit and ALU are together known as CPU. It is Central Processing Unit of the computer. Thus it is also known as central nervous system of the computer. It controls the flow of data and instructions to and from the storage unit to ALU. It controls all other units of the computer. When the operations are done, the result is transferred back to the storage unit. Whenever calculations are required, the control unit transfers the data from storage unit to ALU. The ALU can perform basic operations such as addition, subtraction, division, multiplication etc. Commonly used secondary memory devices are hard disk, CD etc.Īll the calculations are performed in ALU of the computer system. It is used for permanent storage of data. Secondary Storage: The secondary memory is slower and cheaper than primary memory.The data is lost, when the computer is switched off. It is used for temporary storage of data. Primary Storage: This memory is used to store the data which is being currently executed.The storage unit of a computer system can be divided into two categories: It also stores the intermediate results before these are sent to the output devices. This unit holds the data and instructions. Some output devices are printers, monitor etc. It provides the results of any computation, or instructions to the outside world. It connects the internal system of a computer to the external environment. Supply the converted data to computer system.Accept the data and instructions from the outside environment.Commonly used input devices are keyboard, mouse, magnetic tape etc. It provides data and instructions to the computer system. Input unit connects the external environment with internal computer system. One machine cycle involves fetching of instruction, decoding the instruction, transferring the data, executing the instruction.Ĭomputer system has five basic units that help the computer to perform operations, which are given below:
Computer programs for architecture series#
In computer, the CPU executes each instruction provided to it, in a series of steps, this series of steps is called Machine Cycle, and is repeated for each instruction. Computer is an electronic machine that makes performing any task very easy.
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