System memory map specifications | Compaq CQ20 manual

Specifications

System memory map specifications

Size	Memory address	System function

640 KB	00000000-0009FFFF	Base memory

128 KB	000A0000-000BFFFF	Video memory

64 KB	000C0000-000CFFFF	Video BIOS

64 KB	000E8000-000FFFFF	System BIOS

	00100000- XFFFFFFF	Extended memory (based on memory
		installed)

	(X+1)0000000-FEDFFFFF	PCI bus

	FED00000-FED003FF	High precision event timer

	FEE01000-FFFFFFFF	PCI bus

6–8	Maintenance and Service Guide

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Compaq CQ20 manual System memory map specifications, Size Memory address System function

Contents

Maintenance and Service Guide Compaq Presario CQ20 Notebook PCPage Safety warning notice Contents Setup Utility 11Recycling Product description Optical drives Category Description Board MemoryHard drives Diskette drive Category Description Board Ethernet Wireless Integrated Wlan options by way of wireless modulePower requirements External media card Category Description Board Operating system Preinstalled Serviceability End-user replaceable parts Display components External component identificationTop components Item Component Description TouchPad Component FunctionSound Mouse Maintenance Power Options ButtonsComponent Description Keys Component Function Esc keyFn key Lights Front components Left-side components Right-side components Bottom components Illustrated parts catalog Serial number location Computer major components Item Description Speaker assemblyRTC battery Display internal components not illustrated Battery Description Spare Part Number Fan Broadcom 802.11b/g Wlan module Intel 802.11a/b/g/n Wlan module Memory module Cable Kit Description Spare part number Cable Kit Plastics Kit Description Spare part number Plastics Kit Mass storage devices Description Spare part number Description Spare part number AC adapter Power cordsMiscellaneous parts Screw Kit Sequential part number listing Spare part number Description Spare part number Description Spare part number Description Spare part number Description Service considerations Removal and replacement proceduresPreliminary replacement requirements Tools required Grounding guidelines Drive handling Packaging and transporting guidelines Workstation guidelines Unknown user password Material Use Voltage protection level Component replacement procedures Serial number Battery Computer feet Hard drive All hard drive spare part kits include a hard drive bracket Removal and replacement procedures Memory module Reverse this procedure to install a memory module Wlan module Broadcom 802.11b/g Wlan modulesIntel 802.11a/b/g/n Wlan modules Reverse this procedure to install the Wlan module Optical drive Removal and replacement procedures Keyboard Removal and replacement procedures Top cover Removal and replacement procedures Removal and replacement procedures Removal and replacement procedures Speaker assembly Description Spare part number Speaker assembly 493273-001 Removal and replacement procedures Display assembly Removal and replacement procedures Removal and replacement procedures Removal and replacement procedures Removal and replacement procedures Removal and replacement procedures Audio board Description Spare part number Audio board 493272-001 Removal and replacement procedures Fan Description Spare part number Fan 493269-001 Removal and replacement procedures System board Removal and replacement procedures RTC battery Description Spare part number RTC battery 449137-001 Removal and replacement procedures Modem module Description Spare part number Modem module 461749-001 Removal and replacement procedures Bluetooth module Description Spare part number Bluetooth module 398393-002 Removal and replacement procedures Heat sink Removal and replacement procedures Processor Intel Core Duo processors 2-MB cache, 800-MHz FSBIntel Core Duo processors 1-MB cache, 667-MHz FSB Removal and replacement procedures Reverse this procedure to install the processor Setup Utility Starting the Setup UtilityChanging the language of the Setup Utility Navigating and selecting in the Setup Utility Restoring default settings in the Setup UtilityDisplaying system information Main menu Exiting the Setup UtilitySetup Utility menus Security menu System Configuration menu Diagnostics menuPrimary Hard Disk Self Test Specifications Computer specifications Inch, Wxga display specifications Hard drive specifications Access time DVD/CD-RW Combo Drive specificationsBlu-ray ROM DVD±RW SuperMulti DL Drive specifications Applicable disc Read Write System DMA specifications Hardware DMA System function System interrupt specifications Hardware IRQ System function System I/O address specifications Address hex System function shipping configuration EF80-EF9F System memory map specifications Size Memory address System function Screw listing Phillips PM1.5×3.0 screw Color Quantity Length Thread Head diameter Silver Screw listing Phillips PM2.0×3.0 screw Phillips PM2.0×4.0 screw Phillips PM2.0×5.0 captive screw Color Quantity Length Thread Head diameter Black Phillips PM2.0×3.0 screw Phillips PM2.0×6.0 screw Phillips PM2.0×5.0 screw Phillips PM2.0×7.0 captive screw Phillips PM2.0×10.0 captive screw Color Quantity Length Thread Head diameter Silver 10.0 mm Phillips PM2.5×10.0 captive screw Color Quantity Length Thread Head diameter Black 10.0 mm Phillips PM3.0×3.0 screw Phillips PM3.0×4.0 screw Phillips T2.0×2.0BH screw Torx T8M2.5×6.0 slotted screw Screw listing Screw listing Backup and recovery Creating recovery discs When to back up Backup suggestionsBacking up your information Using system restore points When to create restore points Performing a recovery Recovering from the recovery discs Audio-out headphone Connector pin assignmentsPin Signal Audio-in microphone External monitor Hdmi RJ-11 modem RJ-45 network Universal Serial Bus Power cord set requirements Requirements for all countries and regions Requirements for specific countries and regions Country/region Accredited agency Applicable note number Battery RecyclingDisplay Recycling Maintenance and Service Guide 11-3 11-4 Maintenance and Service Guide 11-5 11-6 Index Index Esc 2-4fn 2-4function 2-4keypad Index-4 Maintenance and Service Guide Index-5