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NORTHERN EET 450 - Supporting I/O Devices

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Chapter 10You Will Learn…Requirements for a New DeviceBasic Principles of Peripheral InstallationsInstallation OverviewSlide 6Installing a Hardware DeviceInstalling a Hardware DeviceSlide 9Using Ports and Expansion Slots for Add-on DevicesPort SpeedsUsing Serial PortsSerial, Parallel, and Game PortsDefault Port AssignmentsPort AssignmentsVerifying a Port Is Configured CorrectlySerial Port SpecificationsNull Modem ConnectionNull Modem CableNull Modem CableInfrared TransceiversUsing Parallel PortsSlide 23Types of Parallel PortsA Standard Parallel PortUsing USB PortsUsing USB PortsSlide 28Slide 29USB Host ControllerRequirements for Installing a USB DeviceInstalling a USB DeviceUsing IEEE 1394 PortsTypes of IEEE 1394 PortsIEEE 1394 PortsUsing PCI Expansion SlotsUsing PCI Expansion SlotsPCI Bus MasterSlide 39Slide 40Using ISA Expansion SlotsKeyboardsAn Ergonomic KeyboardCorrect Position at the KeyboardKeyboard ConnectorsKeyboard ConnectorsKeyboard Connector AdapterSlide 48Installing a KeyboardTroubleshooting KeyboardPointing DevicesHow a Wheel Mouse WorksMouse Connection TypesCleaning the MouseManufacturers of Keyboards and Pointing DevicesTroubleshooting a MouseChapter SummaryChapter 10Supporting I/O DevicesYou Will Learn…How to install peripheral I/O devicesHow to use ports and expansion slots for add-on 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 themRequirements for a New DeviceDevice driver or BIOSSystem resources (eg, IRQ, DMA channel, I/O addresses, upper memory addresses)Application softwareBasic Principles of Peripheral InstallationsPeripheral is a hardware device controlled by software; install both hardware and softwareSoftware might be of different types; install all levelsMore than one peripheral device might attempt to use same computer resources; resolve resource conflictsInstallation Overview1. Install the device (internal or external)2. Install the device driver3. Install the application softwareInstalling a Hardware DeviceTurn off PC, plug in the device, and rebootIf device is PnP, the Add New Hardware Wizard launchesInstalling a Hardware DeviceInstalling a Hardware DeviceUsing Ports and Expansion Slots for Add-on DevicesDevices can:• Plug directly into a port (serial, parallel, USB, orIEEE 1394)• Use an expansion card plugged into an expansion slotAll computers come with:• One or two serial ports•One parallel port• One or more USB ports or an IEEE 1394 port (on newer computers)Port SpeedsUsing Serial PortsTransmit data in single bitsIdentified by counting the pinsSometimes called DB-9 and DB-25 connectorsAlmost always maleOriginally intended for input and output devicesCan be configured for COM1, COM2, COM3, or COM4Conforms to RS-232c standard interfaceSerial, Parallel, and Game PortsDefault Port AssignmentsPort AssignmentsVerifying a Port Is Configured CorrectlySerial Port SpecificationsNull Modem ConnectionSpecial cable (null modem cable or modem eliminator) enables data transmission between two DTE devices without the need for modems Null modem cable has several wires cross-connected to simulate modem connectionNull Modem CableNull Modem CableInfrared TransceiversUse resources of the serial port for communicationCreate a virtual infrared serial port and virtual infrared parallel port for infrared devicesCommon problem: line-of-sight issue•Radio technology (eg, Bluetooth or 802.11b) is most popular way to connect wireless I/O deviceUsing Parallel PortsTransmit data in parallel, eight bits at a timeCable longer than 10 or 15 feet can compromise data integrityAlmost always femaleCommonly used by printers; also for some input devicesCan be configured as LPT1, LPT2, and LPT3Types of Parallel PortsStandard parallel port (SPP)•Data flows in one direction•Comparatively slowerEnhanced Parallel Port (EPP)•BidirectionalExtended Capabilities Port (ECP)•Bidirectional•Uses a DMA channelA Standard Parallel PortUsing USB PortsExpected to ultimately replace serial and parallel ports•Faster•Use higher quality cabling•Easier to manageAllows for hot-swapping and is hot-pluggableUsed by many devices (eg, mice, joysticks, keyboards, printers)Using USB PortsUsing USB PortsUsing USB PortsUSB Host ControllerPolls each device, asking if data is ready to be sent or requesting to send data to the deviceManages communication to the CPU for all devices, using only a single IRQ, I/O address range, and DMA channelAutomatically assigns system resources at startup (with the OS)Requirements for Installing a USB DeviceMotherboard or expansion card that provides a USB portOS that supports USBUSB deviceUSB device driverInstalling a USB DeviceUsing IEEE 1394 PortsAlso called FireWire and i.LinkTransmits data serially; faster than USBSupports data speeds as high as 1.2 GbpsLikely to replace SCSI for high-volume, multimedia external devicesDevices can be daisy-chained together and managed by a host controller using a single set of system resourcesUses isochronous data transferTypes of IEEE 1394 PortsIEEE 1394 PortsUsing PCI Expansion SlotsPCI bus is now the standard local I/O busDevices connected to it can run at one speed while the CPU runs at a different speedOften used for fast I/O devices (eg, network cards or SCSI host adapters)Using PCI Expansion SlotsPCI Bus MasterManages the PCI bus and expansion slotsAssigns IRQ and I/O addresses to PCI expansion cardsPCI bus uses an interim interrupt between the PCI card and the IRQ line to the CPUUsing PCI Expansion SlotsUsing PCI Expansion SlotsUsing ISA Expansion SlotsConfiguration is not automatedISA bus does not manage system resourcesISA device must request system resources at startupKeyboardsTraditional straight design or ergonomic designTwo technologies for keys making contact•Foil contact•Metal contactAn Ergonomic KeyboardCorrect Position at the KeyboardKeyboard ConnectorsPS/2 connector (mini-DIN)•Small, round, with six pinsDIN connector•Round with five pinsUSB portWireless connectionKeyboard ConnectorsKeyboard Connector AdapterKeyboard ConnectorsInstalling a KeyboardUsually means plugging it in and turning on the PCSystem BIOS manages the keyboard, so no keyboard drivers are necessary


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