PC Maintenance: PC Maintenance: Preparing for A+ Preparing for A+

CertificationCertificationChapter 14: Configuring Devices Chapter 14: Configuring Devices

in Windowsin Windows

Chapter 14 ObjectivesChapter 14 Objectives

Identify resources that devices needIdentify resources that devices need Learn default resource assignments Learn default resource assignments

(memorize for A+ exam)(memorize for A+ exam) Explain Plug and PlayExplain Plug and Play View and change resource assignments in View and change resource assignments in

WindowsWindows Update device driversUpdate device drivers Disable devicesDisable devices

Device ResourcesDevice Resources

Interrupt Requests (IRQs)Interrupt Requests (IRQs) I/O AddressesI/O Addresses Memory AddressesMemory Addresses Direct Memory Access (DMA) ChannelsDirect Memory Access (DMA) Channels

Default Resource AssignmentsDefault Resource Assignments

IRQIRQ DeviceDevice

00 System TimerSystem Timer

11 Keyboard ControllerKeyboard Controller

22 Cascade to IRQ 9Cascade to IRQ 9

33 COM2, COM4COM2, COM4

44 COM1, COM3COM1, COM3

55 LP2 or sound cardLP2 or sound card

66 Floppy drive controllerFloppy drive controller

77 LPT1LPT1

IRQIRQ DeviceDevice

88 Real-time clockReal-time clock

99 Cascade IRQ 2 / AvailableCascade IRQ 2 / Available

1010 AvailableAvailable

1111 SCSI expansion board or SCSI expansion board or AvailableAvailable

1212 Mouse port or AvailableMouse port or Available

1313 Math coprocessorMath coprocessor

1414 Primary IDEPrimary IDE

1515 Secondary IDESecondary IDE

Plug and PlayPlug and Play

Requires:Requires: PnP compatible motherboardPnP compatible motherboard PnP compatible device being installedPnP compatible device being installed PnP compatible operating systemPnP compatible operating system

Purpose:Purpose: Enables BIOS to interact with deviceEnables BIOS to interact with device Identifies device to OSIdentifies device to OS Automatically installs the driver if it is readily Automatically installs the driver if it is readily

availableavailable

Advanced Configuration and Advanced Configuration and Power Interface (ACPI)Power Interface (ACPI)

Two purposes:Two purposes: Manages PnP device resourcesManages PnP device resources Enables power conservation utilitiesEnables power conservation utilities

Requires:Requires: ACPI-compliant motherboard BIOSACPI-compliant motherboard BIOS ACPI-aware operating systemACPI-aware operating system

Viewing Resource Assignments Viewing Resource Assignments in Windowsin Windows

In Windows 9x:In Windows 9x: Device Manager Device Manager tab in System tab in System Properties boxProperties box

Viewing Resource Assignments Viewing Resource Assignments in Windowsin Windows

In Windows In Windows 2000/XP:2000/XP: Click Device Click Device Manager button on Manager button on Hardware tab of Hardware tab of System Properties System Properties boxbox

System InformationSystem Information

Available in Windows 98 and higher from Available in Windows 98 and higher from Accessories/System Tools menuAccessories/System Tools menu

Installing Plug and Play DevicesInstalling Plug and Play Devices

Windows detects new deviceWindows detects new device Looks for a driverLooks for a driver

If found, installs automaticallyIf found, installs automatically If not found, prompts for a diskIf not found, prompts for a disk

Assigns resources to the deviceAssigns resources to the device

Installing Non-PnP DevicesInstalling Non-PnP Devices

Jumpers may be Jumpers may be required to be set required to be set on the boardon the board

Windows will Windows will respect the respect the device’s demand device’s demand for particular for particular resources if resources if possiblepossible

Device DriversDevice Drivers

Software that interprets between the OS Software that interprets between the OS and the deviceand the device

Information needed for driver installation Information needed for driver installation contained in an INF filecontained in an INF file

The actual driver is a SYS or DLL file or a The actual driver is a SYS or DLL file or a combination of filescombination of files

Update a DriverUpdate a Driver

Find device in Device Manager and Find device in Device Manager and double-click itdouble-click it

On Driver tab, click Update Driver buttonOn Driver tab, click Update Driver button Follow the promptsFollow the prompts

Signed DriversSigned Drivers

Used in Windows XP to ensure driver Used in Windows XP to ensure driver integrityintegrity

Warning appears if unsigned driver is Warning appears if unsigned driver is attempting to installattempting to install

Look online for updated, signed drivers Look online for updated, signed drivers when possiblewhen possible

Install an unsigned driver only as a last Install an unsigned driver only as a last resortresort

Identifying a Resource ProblemIdentifying a Resource Problem

Look for Look for exclamation point exclamation point icon in Device icon in Device ManagerManager

Double-click device Double-click device to find out what’s to find out what’s wrong with itwrong with it

Manually Changing Resource Manually Changing Resource AssignmentsAssignments

Try a different Try a different configurationconfiguration

Change Change individual individual resource if resource if neededneeded

Disable a DeviceDisable a Device

Different from Different from uninstallationuninstallation

Leaves device on Leaves device on the list but takes the list but takes away its away its resourcesresources

DisableUninstall