Transcript US2780 PP
Generic Computing: Operate and maintain a personal computer system Using Microsoft Windows XP Unit 2780: Version 5 - Level 2 Credit 9 HARDWARE COMPONENTS PC1.1 Brain of the computer Integrated circuit on a silicon chip Has an ALU and Control Units. Handles both input and output. Also processor device. Silicon chips that store data Very fast, but temporary Needs power Comes on chips Memory CPU Input device with alpha/numeric keys Arrow keys Function keys Other special keys Keyboard Personal Computer Hardware Components Display Output device displaying programs and data 14”, 15”, 17” Buttons adjust picture Thousands of pixels make up picture Black/white or colour Different resolution quality Mouse DISK DRIVE Input device with 2 or 3 buttons Ball underneath rolls Sends choices or instructions to computer Magnetic platters that store data Slow but permanent Hard disks and diskettes Read/write head HARDWARE COMPONENTS A PC1.2 B Display ● Selects text, makes choices, and sends instructions to the CPU. Mouse ● Sends characters, numbers, choices and instructions to the CPU. RAM ● Memory Keyboard ● Shows the program, the characters and the numbers as it receives them from the CPU. Controls the flow of information to and from all the other components. It makes all the decisions and calculations. Central ● Processing Unit Permanently stores the program and data, and sends them to the CPU when they are being used. Receives the data stored in RAM from the CPU when you choose to save it. Disk Drive ● Temporarily stores the program and data while you are working on something. When you save your work, the CPU sends it to the disk drive. HARDWARE COMPONENTS PC1.2 How the components interacts each other Mouse Disk Drives CPU Keyboard Display RAM Memory PC SOFTWARE PC2.1 Operating System The operating system is a set of programs that run the computer. Its purpose is: To help the computer interpret the commands it receives from you and the applications you are using; To manage the data you are working with; To manage the input (data coming in from the disk drives, keyboards, and mouse, etc) and output (data going to the screen, disk drives, etc) Example Microsoft Windows 98/XP, 95, 3.11, MS-DOS 6 and Unix and OS/2 PC SOFTWARE PC2.2 Application Software Word Processing - Creating text based documents like letters, reports, stories, etc. Examples - Microsoft Word, WordPerfect, Ami Pro. Desktop Publishing Producing documents with greater flexibility to design the layout of the pages, combine text and graphics, and use special effects. Used for books, magazines, newspapers, etc. Examples - PageMaker, Microsoft Publisher. Communications - Allows computers to talk to each other over a phone line using a modem. Example - Internet. Spreadsheet - Working with numbers, calculations, statistical, financial and accounting functions, i.e., budgets, wages, cashflow forecasts, balance sheets, Examples - Excel, Lotus, Quattro Pro. Database - Managing large amounts of related data. ie, client database, staff records, address lists, stock files, etc. Examples - Microsoft Access, Dbase, Paradox. Graphics - a) drawing pictures, painting, scanning pictures, etc. Examples Paintbrush, Freehand, CorelDraw! b) Presentation Graphics - creating special presentations, charts, OHT’s, etc. Example – PowerPoint. PC SOFTWARE PC2.3 How it works You want to print a letter, so you tell MS Word to print You get the message APPLICATION SOFTWARE – Microsoft Word MS Word sends the command to the operating system (OS) MS Word displays a message saying the printing has been done OPERATING SYSTEM (OS) – Windows XP The OS interprets the command The OS tells MS Word and tells the PC to send the letter to the printer COMPUTER – Pentium 4 The PC does as it is told The PC tells OS that printing is done Operate a printer Think about…. • Printer Not Ready • Paper Jam • Load Correct Paper PC3.1, 3.2 Maintenance PC4.3 Think about …hardware Faults… • Keyboard • Mouse • Display Think about …Hardware Maintenance… Ergonomics PC5.2 Think about … the important factors to consider • Temperature • Work station location and design • Work station location and design • Keyboard ……….