1. Welcome Class: IX-B.Std Subject: Computer Studies Conducted by Rashedul Islam Lecturer in Computer Science

2. Computer Organization

3. Organization of computer in the early age CPU, Mathematical Logic Unit, Control Unit, Input-output, Memory would place separately in the hardware portion. Example: IBM 1620

4. Organization of computer at present Hardware Software CPU Input Output Operating system Application program

5. CPU(Microprocessor)

6. Execution of program stored in memory To perform mathematical and logical operation Exchange information with other parts Coordinate the work of input and output etc. Major works done by CPU Microprocessor has 3 parts Control unit Memory unit ALU

7. Control Unit ALU Input unit Output unit Memory Control signal

8. ALU Mathematical work Logical work Data manipulation

9. Instruction cycle Start Instruction fetch and decode (Fetch cycle) Instruction Execution (Execution cycle) Stop

10. BUS Address Bus (Unidirectional) Address Bus (Unidirectional) Control Bus Data Bus

11. Other famous Buses VESA ISA EISA PCI USB Fire wire

12. Group activities 1 2 Write down importance of microprocessor Describe activities of control unit. Group #

13. Evaluation What is organization of computer? How was the organization of IBM 1620? What are the parts of CPU ? What are the functions of ALU? What is instruction cycle? What is USB, Fire wire, VESA ?

14. Home Work How CPU can be used to process result of any exam?

15. THANK YOU