Configuring input and output devices
- 1. CONFIGURING INPUT AND OUTPUT DEVICES By; Mary Jane Padua
- 3. INPUT DEVICES Input device captures information and translates it into a form that can be processed and used by other parts of your computer. Keyboards Pointing devices Game controllers Scanners Styluses Microphones Digital cameras Web cams
- 4. INPUT DEVICES The keyboard is the most common input device. Types of keyboards include: Wireless Multimedia and one-touch access Portable keyboards for PDAs
- 5. TYPES OF INPUT DEVICES
- 6. POINTING DEVICES Pointing devices are mainly used to choose and enter commands Pointing devices tend to have PS/2 connectors or USB connectors PS/2 connector fits into a PS/2 port, which a small round socket with small holes that fit the pins on the connector USB connectors fit into USB ports, and these are small rectangular openings on the back or front of your computer, or even on your keyboard or monitor
- 7. POINTING DEVICES Various pointing devices are available Types of pointing devices: Mouse Mechanical mouse Optical mouse Wireless mouse Trackball Touchpad Pointing stick
- 8. GAME CONTROLLER Game controllers are used mainly to play games Types of gaming devices Gamepads Joysticks Gaming wheels Force feed
- 9. SPECIALIZED INPUT DEVICES Other types of input devices include: Scanners Styluses Microphones Digital cameras Web cams
- 10. SCANNER Scanner is a light sensitive device that helps you copy or capture images, photos, and artwork that exist on paper. Types of scanners include: Flatbed
- 11. STYLUSES Stylus is an input device consisting of a thin stick that uses pressure to enter information or to click and point Styluses are used with: PDAs Tablet PCs Graphics tablets
- 12. MICROPHONES Microphones are used to input audio Three main types of microphones are: Desktop microphones Headsets Directional microphones Speech recognition is increasingly being included in application software
- 13. DIGITAL CAMERAS Digital cameras are used to: Download images to a computer Post pictures to the Web Produce videos Resolution is measured in megapixels Higher the resolution, better the image quality, but the more expensive the camera
- 14. WEB CAMS Web cam is a video camera that can be used to take images for uploading to the Web
- 15. OUTPUT DEVICES Output devices take information within your computer and present it to you in a form that you can understand Main output devices: Monitors Printers Speakers
- 16. FLAT PANEL DISPLAY DEVICES Devices with flat-panel displays Tablet PCs PDAs Cellular phones Desktop computers
- 17. MONITORS CRTs Flat-panel displays Gas plasma LCD (liquid crystal display) Passive matrix Active matrix Called TFT (thin film transistor) Separate transistor for every pixel
- 18. PRINTERS Inkjet most popular Makes images by forcing droplets through nozzles Top speed is 20 pages per minute Laser Forms images using an electrostatic process Prints between 3 and 30 pages per minute
- 19. PRINTERS Multifunction printer: Scan, copy, fax, and print Can be either inkjet or laser Cost less than buying individual units Take up less desk space
- 20. SPEAKERS A speaker is a device that produces computer output as sound Speakers are common devices in computer systems Examples include: Built-in speaker Two-device set speakers Surround sound speakers
- 21. OPERATING SYSTEMS AND DEVICES : AN OVERVIEW The operating system must: Handle input from the keyboard, mouse, and other input devices Handle output on the screen, printer and other output devices Control information storage and retrieval Support communication with remote computers
- 22. DEVICE DRIVERS A device driver is a program that controls a particular type of device that is attached to your computer. There are device drivers for printers, displays, CD-ROM readers, diskette drives, and so on. When you buy an operating system, many device drivers are built into the product.
- 23. USING DEVICE DRIVERS OS provides basic input and output support for the parallel, serial, bus, or ports Specific features of individual devices are provided by device drivers
- 24. USING DEVICE DRIVERS MACINTOSH users Can use ZIP-format archives More common format is STUFFIT UNIX system users Retrieve drivers in tar format Stuffit is also available for some UNIX system
- 25. MANUFACTURER DRIVER INSTALLATION Hardware installation manufacturers install utility Usually fully automatic Well documented
- 26. WINDOWS 2000/XP/SERVER 2003 DEVICE AND DRIVERS INSTALLATION Several Installation Methods PnP capability Add/remove Hardware wizard or Add Hardware Wizard Specialization Icon on Control Panel Device manager
- 27. PnP method Shut down the OS Turn off the power Connect the device Plug the device into power Turn on the computer OS automatically installs the drivers
- 28. WINDOWS 2000/XP/SERVER 2003 DEVICE AND DRIVERS INSTALLATION ADD/REMOVE HARDWARE OR ADD HAARDWARE WIZARDS Windows 2000 uses ADD/REMOVE Hardware wizard Windows XP/Server 2003 uses ADD/REMOVE Wizard Control Panel method
- 29. WINDOWS 2000/XP/SERVER 2003 DEVICE AND DRIVERS INSTALLATION DEVICE MANAGER METHOD Convenient method Determine location of device drive files Check to make sure a device is working Determine if there is a resource conflict
- 30. WINDOWS 2000/XP/SERVER 2003 DEVICE AND DRIVERS INSTALLATION INTERRUPT REQUEST(IRQ) Communication channel Can communicate with the CPU I/O ADDRESS RANGE Memory reserve for a particular device Device manager shows IRQ lines and any conflicts
- 31. WINDOWS 2000/XP/SERVER 2003 DEVICE AND DRIVERS INSTALLATION DRIVER SIGNING Unique digital signature Ensures that the driver works properly Security feature to ensure that there has been no tampering
- 32. UNIX/LINUX DRIVER INSTALLATION Concept of drivers in UNIX different fro other operating systems The kernel is where most device drivers are loaded Device special files Blocked special files Character special files named pipes
- 33. MAC OS X DRIVER INSTALLATION Mac OS X systems include drivers for most hardware General steps for new hardware installs: Shut down OS and turn off computer Attach the new hardware Restart the computer and OS Insert CD-ROM Run the installer program