Components of Computer – Computer Basics

Computer Basics Part-2

There are four basic components of Computer

• CPU(Central Processing Unit)
• Input
• Storage
• Output

CPU (central processing unit)

• CU+ALU (control unit + arithmetic and logical unit)
• Operations performed by a microprocessor s called “Instruction Set” is “Hard wired” In CPU and determines the machine language for the CPU.
• Processors differ form one another by there Instruction Set

       ALU(Arithmetic and Logic Unit)

1. 1.  Arithmetic and logical unit
   2.  Actual execution of instruction take place here   
   3.  Calculations (+ – * /)
   4.  comparisons (< > =)
   5.  Data may move form ALU to primary storage, back and forth till needed.

      CU(Control Unit)

1. 1. Direct and control the activities of internal and external devices

Input

Convert outside world instructions and data In computer acceptable format and supplies it to computer for further processing.

 

Output

Is reverse of input unit. Converts binary form into human understandable form

Storage

All instructions and data input store here and get processed one by one. Stores results, intermediate results and instructions.