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PC Hardware Servicing
Chapter 14: Configuring Devices
in Windows
Chapter 14 Objectives
• Identify resources that devices need
• Learn default resource assignments
(memorize for A+ exam)
• Explain Plug and Play
• View and change resource assignments in
Windows
• Update device drivers
• Disable devices
Device Resources
• Interrupt Requests (IRQs)
• I/O Addresses
• Memory Addresses
• Direct Memory Access (DMA) Channels
Default Resource Assignments
IRQ Device
0 System Timer
1 Keyboard Controller
2 Cascade to IRQ 9
3 COM2, COM4
4 COM1, COM3
5 LP2 or sound card
6 Floppy drive controller
7 LPT1
IRQ Device
8 Real-time clock
9 Cascade IRQ 2 / Available
10 Available
11 SCSI expansion board or
Available
12 Mouse port or Available
13 Math coprocessor
14 Primary IDE
15 Secondary IDE
Plug and Play
• Requires:
– PnP compatible motherboard
– PnP compatible device being installed
– PnP compatible operating system
• Purpose:
– Enables BIOS to interact with device
– Identifies device to OS
– Automatically installs the driver if it is readily
available
Advanced Configuration and Power
Interface (ACPI)
• Two purposes:
– Manages PnP device resources
– Enables power conservation utilities
• Requires:
– ACPI-compliant motherboard BIOS
– ACPI-aware operating system
Viewing Resource Assignments in
Windows
• In Windows 9x:
Device Manager
tab in System
Properties box
Viewing Resource Assignments in
Windows
• In Windows
2000/XP:
Click Device
Manager button on
Hardware tab of
System Properties
box
System Information
• Available in Windows 98 and higher from
Accessories/System Tools menu
Installing Plug and Play Devices
• Windows detects new device
• Looks for a driver
– If found, installs automatically
– If not found, prompts for a disk
• Assigns resources to the device
Installing Non-PnP Devices
• Jumpers may be
required to be set
on the board
• Windows will
respect the
device’s demand
for particular
resources if
possible
Device Drivers
• Software that interprets between the OS
and the device
• Information needed for driver installation
contained in an INF file
• The actual driver is a SYS or DLL file or a
combination of files
Update a Driver
• Find device in Device Manager and
double-click it
• On Driver tab, click Update Driver button
• Follow the prompts
Signed Drivers
• Used in Windows XP to ensure driver
integrity
• Warning appears if unsigned driver is
attempting to install
• Look online for updated, signed drivers
when possible
• Install an unsigned driver only as a last
resort
Identifying a Resource Problem
• Look for
exclamation point
icon in Device
Manager
• Double-click device
to find out what’s
wrong with it
Manually Changing Resource
Assignments
• Try a different
configuration
• Change
individual
resource if
needed
Disable a Device
• Different from
uninstallation
• Leaves device on
the list but takes
away its
resources
Disable
Uninstall

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Configuring Devices in Windows

  • 1. PC Hardware Servicing Chapter 14: Configuring Devices in Windows
  • 2. Chapter 14 Objectives • Identify resources that devices need • Learn default resource assignments (memorize for A+ exam) • Explain Plug and Play • View and change resource assignments in Windows • Update device drivers • Disable devices
  • 3. Device Resources • Interrupt Requests (IRQs) • I/O Addresses • Memory Addresses • Direct Memory Access (DMA) Channels
  • 4. Default Resource Assignments IRQ Device 0 System Timer 1 Keyboard Controller 2 Cascade to IRQ 9 3 COM2, COM4 4 COM1, COM3 5 LP2 or sound card 6 Floppy drive controller 7 LPT1 IRQ Device 8 Real-time clock 9 Cascade IRQ 2 / Available 10 Available 11 SCSI expansion board or Available 12 Mouse port or Available 13 Math coprocessor 14 Primary IDE 15 Secondary IDE
  • 5. Plug and Play • Requires: – PnP compatible motherboard – PnP compatible device being installed – PnP compatible operating system • Purpose: – Enables BIOS to interact with device – Identifies device to OS – Automatically installs the driver if it is readily available
  • 6. Advanced Configuration and Power Interface (ACPI) • Two purposes: – Manages PnP device resources – Enables power conservation utilities • Requires: – ACPI-compliant motherboard BIOS – ACPI-aware operating system
  • 7. Viewing Resource Assignments in Windows • In Windows 9x: Device Manager tab in System Properties box
  • 8. Viewing Resource Assignments in Windows • In Windows 2000/XP: Click Device Manager button on Hardware tab of System Properties box
  • 9. System Information • Available in Windows 98 and higher from Accessories/System Tools menu
  • 10. Installing Plug and Play Devices • Windows detects new device • Looks for a driver – If found, installs automatically – If not found, prompts for a disk • Assigns resources to the device
  • 11. Installing Non-PnP Devices • Jumpers may be required to be set on the board • Windows will respect the device’s demand for particular resources if possible
  • 12. Device Drivers • Software that interprets between the OS and the device • Information needed for driver installation contained in an INF file • The actual driver is a SYS or DLL file or a combination of files
  • 13. Update a Driver • Find device in Device Manager and double-click it • On Driver tab, click Update Driver button • Follow the prompts
  • 14. Signed Drivers • Used in Windows XP to ensure driver integrity • Warning appears if unsigned driver is attempting to install • Look online for updated, signed drivers when possible • Install an unsigned driver only as a last resort
  • 15. Identifying a Resource Problem • Look for exclamation point icon in Device Manager • Double-click device to find out what’s wrong with it
  • 16. Manually Changing Resource Assignments • Try a different configuration • Change individual resource if needed
  • 17. Disable a Device • Different from uninstallation • Leaves device on the list but takes away its resources Disable Uninstall