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Chapter 10

Chapter 10. Supporting I/O Devices. You Will Learn…. How to use ports and expansion slots for add-on devices How to install peripheral I/O devices About keyboards and how to troubleshoot them About different types of pointing devices

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Chapter 10

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  1. Chapter 10 Supporting I/O Devices

  2. You Will Learn… • How to use ports and expansion slots for add-on devices • How to install peripheral I/O devices • About keyboards and how to troubleshoot them • About different types of pointing devices • How monitors and video cards relate to the system, and how to troubleshoot them A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  3. Basic Principles of Peripheral Installations • Both hardware and software must be installed (hardware is controlled by software) • Install all levels of software • Device driver must be written specifically for the OS • More than one peripheral device might attempt to use same resources • Update drivers, the firmware, or both A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  4. Installation Overview • Install the device (internal or external) • Install the device driver • Install the application software A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  5. Ports A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  6. Using Ports and Expansion Slots for Add-on Device • Ports • Serial • Parallel • USB • IEEE 1394 • SCSI • Expansion slots A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  7. Port Speeds A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  8. Using Serial Ports • Transmit data in single bits (serially) • Nine or 25 pins • Almost always male • Originally intended for input and output devices • Configured as COM1, COM2, COM3, or COM4 A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  9. Using Serial Ports (continued) • Port assignments are made in CMOS setup • Conform to standard interface called RS-232c • Data Terminal Equipment (DTE) and Data Communications Equipment (DCE) designations A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  10. Port Comparison A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  11. Default Port Assignments A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  12. Serial Port Specifications A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  13. Null Modem Connection • Enables data transmission between two DTE devices without the need for modems • Special cable (null modem cable) has several wires cross-connected to simulate modem connection A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  14. Pin Connections for a 25-Pin Null Modem Cable A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  15. Wire Connections on a 25-Pin Null Modem Cable A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  16. Infrared Transceivers • Use resources of a serial port for communication • Create a virtual infrared serial port and virtual infrared port for infrared devices • UART logic on the motherboard controls serial ports on the board • Line-of-sight issue A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  17. Using Parallel Ports • Transmit data in parallel, eight bits at a time • Almost always female • Originally intended for printers • Can be configured as LPT1, LPT2, or LPT3 • Port assignments are made in CMOS setup • Avoid using a cable longer than 15 feet to ensure data integrity A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  18. Types of Parallel Ports • Standard parallel port (SPP) • Allows data to flow in only one direction • Slowest of the three types • Enhanced Parallel Port (EPP) • Bi-directional • Extended Capabilities Port (ECP) • Bi-directional • Uses the DMA channel A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  19. A Standard Parallel Port A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  20. Configuring Parallel Ports • Setup can have up to four different settings for parallel ports A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  21. Using USB Ports • Effortless installation of slow peripheral devices • Much faster than regular serial ports; use higher-quality cabling • Easier to manage; eliminate need to manually resolve resource conflicts • Likely to replace serial and parallel ports A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  22. Using USB Ports (continued) • Allow for hot-swapping; are hot-pluggable • Most current motherboards have one to four USB ports • Managed by a USB host controller • As many as 127 USB devices can be daisy-chained together using USB devices A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  23. USB Ports A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  24. USB Host Controller A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  25. Requirements for Preparing to Install a USB Device • Motherboard or expansion card that provides a USB port • OS that supports USB • USB device • USB device driver A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  26. Installing a USB Device • Some devices (eg, printers) require the device to be plugged in before installation • Some devices (eg, scanners) require the driver to be installed before the device is plugged in • Using Device Manger, verify that USB controller is installed and working properly A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  27. Using IEEE 1394 Ports • Transmit data serially; faster than USB • Likely to replace SCSI for high-volume, multimedia external devices • Provide either a 4-pin or 6-pin connector • Hot-pluggable • Can be daisy-chained together and managed by a host controller using one set of system resources • Use isochronous data transfer A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  28. IEEE 1394 Port Standards • IEEE 1394A • Supports data speeds up to 1.2 Gbps • Allows for cable lengths up to 15 feet • IEEE 1394B • Supports speeds up to 3.2 Gbps • Allows for cable length up to 328 feet A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  29. IEEE 1394 Cable Connections A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  30. Using IEEE 1394 Ports A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  31. Installing an Expansion Card in an Expansion Slot A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  32. Using Specialized Devices and Extra Ports A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  33. Using PCI Expansion Slots • PCI bus • Currently the standard I/O bus • Uses an interim interrupt between PCI card and IRQ line to the CPU • PCI bus controller • Manages the PCI bus and expansion slots • Assigns IRQ and I/O addresses to PCI expansion cards • Use Device Manager to see which IRQ has been assigned to a PCI device A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  34. Using PCI Expansion Slots (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  35. Using ISA Expansion Slots • Configuration is not automated • ISA bus does not manage system resources, as do USB and PCI bus controllers • ISA device must request system resources at startup A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  36. Solving Problems with Legacy ISA Expansion Cards • Resource conflicts between two legacy devices • Use Windows Device Manager • Problems using legacy device drivers • Try to locate a 32-bit driver for the device A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  37. Solving Problems with Legacy ISA Expansion Cards (continued) • Create empty copy of Autoexec.bat and Config.sys on hard drive then • boot up into MS-DOS mode • run setup program from command prompt • copy appropriate command lines into original versions of Autoexec.bat and Config.sys A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  38. Solving Problems with Legacy ISA Cards A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  39. Solving Problems with Legacy ISA Cards (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  40. Keyboards • Traditional straight design or ergonomic design • Two technologies for keys making contact • Foil contact • Metal contact • Installing keyboards A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  41. Keyboard Connectors • PS/2 connector (or mini-DIN) • Small, round, with six pins • DIN connector • Round with five pins • USB port • Wireless connection • Requires a driver A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  42. Keyboard Connectors (continued) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  43. Pinouts for Keyboard Connectors A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  44. A Keyboard Adapter A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  45. Troubleshooting Keyboards • A few keys don’t work • Keyboard does not work at all • Key continues to repeat after being released • Keys produce the wrong characters • Major spills on the keyboard A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  46. Pointing Devices A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  47. How a Wheel Mouse Works A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  48. How a Mouse Connectsto the Computer • Dedicated round mouse port (motherboard mouse or PS/2-compatible mouse) • Mouse bus card (bus mouse) • Serial port (serial mouse) • USB port • Y-connection with the keyboard • Cordless technology A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  49. Pointing Devices • Touch screens • Other pointing devices • Trackballs • Touch pads A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  50. Troubleshooting a Mouse • Check mouse port connection • Check for dust or dirt; reboot PC • Try new mouse • Uninstall and reinstall mouse driver; reboot PC • Reboot PC and select logged option from startup menu to create Bootlog.exe file • Continue to boot and check log for errors A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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