Module 1-parts of computer and its functions
- 1. MODULE-1 PARTS OF COMPUTERS AND ITS FUNCTIONS PRESENTED BY DR. RAJASHEKHAR SHIRVALKAR
- 2. Father of Computer Charles babbage Charles Babbage, a British Mathematics professor, is regarded as the Father of Computers. He was born in England in 1792 as the son of a rich banker from Devon. He invented the first mechanical Computer during the period 1830 to 1850. This computer called as Babbage’s Analytical Engine performed basic function. This is used in modern computer design, so he is known as Father of computer.
- 3. The word computer is been derived from the word compute which means to calculate. Computer is a calculating device which perform Arthemetic operations at enormous speed. In simple words we can say, computer is a calculating device that reduces 80% of work.
- 4. DEFINITATION A computer is a electronic device that can accept, store and process information to produce the required result. A computer is an electronic machine which can do calculations very fast.
- 6. DATA PROCESSING Performing calculations. Performing logic/comparing data. Graphic Action. Production of data. Communication.
- 8. BLOCK DIAGRAM OF COMPUTER ORGANIZATION. INPUT OUTPUT MEMORY ALU CU CPU
- 9. INPUT Input devices are used to input data and instruction into the computer. These devices are used as mediator for communication between user and computer. EX: Keyboard, Mouse etc.
- 12. CPU: CONTROL PROCESS UNIT. CPU is the most important part of the system and also known as BRAIN of computer.
- 13. FUNCTIONS OF CPU To accept data and instruction. To store data and instruction. To control the sequence of operation. To carry out process.
- 14. CPU MEMORY CUALU
- 15. MEMORY Memory is used to store the information consisting of programs and data. It is made up of number of LSI chips, each memory chip can store thousands of bits of information.
- 17. Primary memory • Primary memory is also called as main memory or semi conductor memory. It is small in size and store the input data instructions inside the system unit. • Ex: ROM and RAM.
- 18. Secondary memory • The secondary memory is out side of the system it is also called as the external memory. It store more information. • Ex: Floppy Disk, Hard Disk and CD Roms.
- 19. CD Rom Floppy Disk Hard Disk
- 20. ALU: Arithmetic logic unit. An ALU is the part of CPU. It performs all the Arithmetic operations like +, -, *, / and logical operations like <,>,=,%,#, when two numbers are to be subjected to any Arithmetic or Logic operation, they are send to ALU from the memory and after the operations are over, the result are put back to the memory.
- 21. The main purpose of ALU It performs mathematical functions. It performs logical comparisons. It performs output variable functions also as logical functions. It does branching on prefixed conditions.
- 22. CU: CONTROL UNIT. CU is the most important part of CPU. It acts as a central system, as it control and supervises all the activities of input and output devices.
- 23. The main purpose of CU It maintains order and controls activity in CPU. It does not process a stored data. It directs sequence of operations. It interprets instructions and gives commands. It communicates with input/output devices for transfer data/results from storage.
- 24. OUTPUT The device use to obtain information from CPU and gives the resultant product as output. Ex: LCD or VDU, Printer Projector etc.
- 26. It is also called as I-P-O cycle. This example would help in understanding I-P-O cycle. • Milk • Sugar • Coffee powder INPUT • Boiling PROCESS • Coffee OUTPUT