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2.0 Computer System

2.0 Computer System. Learning Objectives. 1) Define computer system 2) State the meaning of input, processor, output and storage 3) Describe the information processing cycle which includes input, process, output and storage using a block diagram.

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2.0 Computer System

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  1. 2.0 Computer System

  2. Learning Objectives 1) Define computer system 2) State the meaning of input, processor, output and storage 3) Describe the information processing cycle which includes input, process, output and storage using a block diagram. 4) State the relations of data representation: bit, byte and character.

  3. 2.1 System Concept 2.2 Hardware 2.0 Computer System 2.4 Installation 2.3 Software 2.5 Current and Future Development

  4. 2.0 COMPUTER SYSTEMS 2.1 System Concepts 2.1.1 Overview of Computer Systems 2.1.1.1 Define computer systems A computer is defined “as combination of components designed to process data and store files”

  5. 2.1.1.1 Define computer systems • A computer system is a complete, working computer that combines components designed to process data, retrieve and store files in a meaningful way • Computer is an electronic device, operating under the control of instructions stored its own memory,: • That can accept data (input) • Process the data according to specified rules (process) • Produce results (output) • And stored the result for future use (storage)

  6. 2.1.1.2 Input, Process, Output and Storage COMPUTER PROCESS OUTPUT INPUT STORAGE

  7. INPUT PROCESS STORAGE OUTPUT Define : Any information that is fed (given) to the computer for process Define : A program that is running on your computer or manipulates data in the computer Define : A location which data, instruction and information are held for future use. Every computer uses storage to hold system software and application software Define : The useful information that the computer produced after the data according to out instructions.

  8. Volatile Access faster Limited capacity of storage More expensive Permanent Access slower Unlimited capacity Cheaper INPUT PROCESS STORAGE OUTPUT Types: Text Graphics Audio Video Device: -Keyboard -Mouse -Joystick -Any Pointing device 2 Major Process: 1-Arithmatic Process (Mathematical Problem) 2-Logical Process (Logical Problem) Device Brand: -Intel Pentium -AMD Athlon -G4 Primary Storage: -Random Access Memory -ROM Secondary Storage: -CD ROM -Floppy Disk -Pendrive - Hard Disk Define : The useful information that the computer produced after the data according to out instructions.

  9. Exercise page28

  10. 2.1.1.3 Information Processing Cycle Information Processing Cycle INPUT PROCESS STORAGE OUTPUT An input device feed raw data to the processor. A processor process raw data and turns it into useful information. A storage device keeps or stores both process and unprocessed data for later usage. An output device shows or displays the processed data

  11. 2.1.1.3 Information Processing Cycle • Machine Cycle Memory The processing unit control all activities within the system. For every instruction, the control unit repeats a set four basic operations called the machine cycle (fetch, decode, execute and store) Store Fetch Arithmetic Logic Unit(ALU) Control unit (cu) Decode Execute

  12. 2.1.2 Data Representation 2.1.2 Data Representation 2.1.2.1 Bit, Bait and Character Pencil box Pencil 12 Pencils= 1OZ

  13. 2.1.2 Data Representation 2.1.2.1 Bit, Bait and Character Byte bit 1byte=8bits 1byte=1 single character NUMBER 9= 00111001(BINARY CODE)

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