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Chapter 10

Chapter 10. Supporting I/O Devices. Installing Peripheral Devices. Install the hardware device (internal or external) Install the software: specially for the OS Device driver Application software. Problems in Peripheral Installations.

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Chapter 10

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  1. Chapter 10 Supporting I/O Devices

  2. Installing Peripheral Devices • Install the hardware device (internal or external) • Install the software: specially for the OS • Device driver • Application software A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  3. Problems in Peripheral Installations • 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. Using Ports and Expansion Slots • Ports • Serial • Parallel • USB • IEEE 1394 • SCSI (discussed later) • Expansion slots A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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

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

  7. Serial Ports • Transmit data serially (bit by bit) • 9 or 25 male pins (interface standard: RS-232c) • For input and output devices • mouse, modem • Controlled in CMOS setup • Configured to use system resources as COM1, COM2, COM3, or COM4 A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  8. Serial Port Assignments A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  9. RS-232 • Two types of ports • DTE (Data Terminal Equipment) type: e.g. the port on a computer • DCE (Data Communication Equipment) type: e.g., the port on the modem • The signal names and pin numbers are the same, but signal flow is opposite • Signals are named from DTE’s perspective A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  10. DTE - DCE A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  11. Null Modem Connection (DTE-DTE) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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

  13. Parallel Ports • Transmit data in parallel (8 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

  14. 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

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

  16. Hands-on Project: Verify Port Configuration • pp. 414 and Figure 10-4 A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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

  18. USB Ports • Can be added and removed without turning off the computer (i.e., hot-swappable or hot-pluggable) • Can be used by mice, keyboards, printers, scanners, modems…… • Use serial transmission, but much faster than serial ports • Use higher-quality cabling • Automatically resolve resource conflicts • Likely to replace serial and parallel ports A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  19. Using USB Ports (continued) • 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 A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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

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

  22. Installing a USB Device • Using Device Manger, verify that USB controller is installed and working properly • 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 A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  23. Hands-on Projects: Install a USB Device • pp. 425 and Figure 10-12 A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  24. IEEE 1394 Ports (FireWire or i.Link) • Transmit data serially (up to 3.2G); faster than USB • Likely to replace SCSI for high-volume, multimedia external devices (camcorders, DVDs, and hard drives) • Is hot-pluggable • Can be daisy-chained • Managed by a host controller in the chip set A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  25. 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

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

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

  28. PCI Expansion Slots • PCI bus • Currently the standard I/O bus • PCI bus controller – a part of the chip set • Manages the PCI bus and expansion slots • Assigns IRQ and I/O addresses to PCI expansion cards A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  29. Hands-on Project: Check a PCI Device • pp. 434 and Figure 10-20 A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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

  31. Keyboard Connectors A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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

  33. Keyboard Connectors • PS/2 connector (or mini-DIN) • Small, round, with six pins • USB port • Wireless connection • Requires a driver • DIN • Round with 5 pins A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  34. Pointing Devices • Move a pointer on the screen and perform tasks such as executing (clicking) a command button A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  35. Mouse Technologies • Wheel mouse • Optical mouse A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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

  37. How Do Optical Mice Work? • Read light – illuminates the work surface • Camera – takes 1500 snapshots every second • Microchip – analyze how the mouse moves and reports the coordinates to the computer A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  38. How a Mouse Connectsto the Computer • PS/2 • USB port • Cordless • Y-connection with the keyboard • Serial port (serial mouse) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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

  40. Computer Video • Necessary components for video output • Monitors • Video cards A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  41. Monitors • Rated by screen size, resolution, refresh rate, and interlace features • Most meet standards for Super VGA • Use CRT (cathode-ray tube) or LCD (liquid crystal display) technology A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  42. Choosing the Right Monitor A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  43. How a CRT Monitor Works A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  44. Flat Panel Monitors A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  45. Video Cards • Methods of data transfer • RGB video port • DVI port • Composite video • S-Video A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  46. Methods of Data Transfer A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  47. Video Card Main Features • Bus • AGP • PCI, VESA • Video RAM A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  48. AGP Bus • Runs at the same speed as the system bus • Connects directly to the system bus • 32-bit data path • Direct memory execute (DIME) • Share system memory with the CPU • No need to copy data from system memory to video memory on the card A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  49. AGP Variations • AGP 2X : transfer two cycles of data in a AGP clock beat • AGP 4X • AGP 8X • AGP Pro: longer slot A+ Guide to Managing and Maintaining Your PC, Fifth Edition

  50. Graphics Accelerators • Type of video card that has its own processor • Reduce burden on CPU • MPEG decoding • 3-D graphics • interpolated scaling • EPA Green PC support • Digital output to flat panel display monitors • High-intensity graphics software support (Auto-CAD) A+ Guide to Managing and Maintaining Your PC, Fifth Edition

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