System Memory, System Input/Output Addresses 100-3FF | HP 900

Specifications and Regulatory Information

Software System Resources

System Memory

00000 - 9FFFF

A0000 - BFFFF

C0000 - CBFFF

C0000 - CFFFF

CC000 – DBFFF* D0000 – DBFFF*

DC000*- FFFFF

System memory

Video

Video BIOS (unmarked models***) Video BIOS (“900 B” models***)

Free** (unmarked models***) Free** (“900 B” models***)

System BIOS

*Approximate boundary.

**Valid uses for memory addresses CC000-DBFFF or D0000-DBFFF: Upper memory blocks (UMBs).

PC card memory windows.

***Unmarked models have no “900” after the serial number, “900 B” models have “900 B” after the serial number.

System Input/Output Addresses (100-3FF)

120-127

170-177

1F0-1F7

220-22F

376

Audio (only models without “900” after serial number)

Internal CD-ROM drive (secondary IDE controller)

Internal hard disk (primary IDE controller)

Audio

Internal CD-ROM drive (secondary IDE controller)

378-37F	LPT1 (printer port)
388-38B	Audio
3B0-3BB	Video adapter
3C0-3DF	Video adapter
3E0-3E1	PCMCIA controller
3F0-3F5	Floppy controller
3F6	Internal hard disk (primary IDE controller)

3F7	Floppy controller
3F8-3FF	COM1 (serial port)

132 Reference Guide

Image 132

HP 900 manual System Memory, System Input/Output Addresses 100-3FF

Contents

HP OmniBook Reference Guide Reference Guide HP Software Product License Agreement Edition History Contents Managing Battery Power Expanding the OmniBook Configuring the OmniBook TroubleshootingSupport and Service Specifications and Regulatory Information 127 Index Introducing the OmniBook Getting More Information SourceDescription and Location Taking Inventory Included in the OmniBook box To buy OmniBook accessories OmniBook Features OmniBook-Front View OmniBook-Side View OmniBook-Back View OmniBook-External Module Bay Setting Up for the First Time To set up the OmniBook and WindowsWarranty. Refer to the warranty statement for your product Windows NT Year To connect the floppy disk drive Operating the OmniBook Starting and Stopping the OmniBook To start and stop the OmniBook To reset the OmniBook Hint To check power status and drive activity Checking the Status of the OmniBook To check the keyboard status Using the OmniBook Pointing Devices To use the built-in pointing devices Windows Disable the pointing stick Install touch pad supportTo activate full touch pad capabilities To configure pointing devices Enable the pointing stickInstall pointing stick support To activate full pointing stick capabilities To disable the touch pad or pointing stick Using the OmniBook Display To adjust the display brightnessTo extend the life of the display To suspend the OmniBook when closing the display Adjusting the Audio System To adjust the volumeOn the Keyboard Windows Using the OmniBook Keyboard To use the Fn hot keysOmniBook Library These keys Do this To use the Windows keys To use the embedded keypad To use the ALT GR key What is RSI? Working in ComfortAbout Repetitive Strain Injury What causes RSI? What can I do to avoid RSI?What if I experience discomfort? Preparing Your Work Environment Your Chair Your Work Surface Your Work Posture Setting Up Your HP Computing Equipment Your HP Monitor Working in Comfort Monitor Use Specifications Document HoldersYour HP Keyboard Mice and Other Input Devices Working in Comfort Comfort and Safety Checklist Headphones and SpeakersGeneral Overall Using Your Mobile Computer Your HP OmniBook ComputerPreparing Your Mobile Work Environment Working in Comfort Taking Care of Your OmniBook Protect your OmniBook from damageProtect your hard disk drive from damage Protect your work Managing Battery Power How Power is Managed Monitoring Battery Power To install APM for Windows NT To check the battery status On the BatteryFrom the Windows Taskbar From Windows Control Panel To respond to a low-battery warning To recharge a battery Battery life Charging timeOptimum Charging To replace the battery Adapter Safety on Conserving Battery Power To save battery power To set power time-outs Windows 95, 98, or NT To get the most from your battery Page Expanding the OmniBook Using the External Module Bay To install hot-swap supportAction, you could lose data To remove or install the bay or module Otherwise, you could lose data Installing To connect the floppy disk drive to the parallel port Connecting External Devices To identify connectors for external devices To enable the built-in and external displays To change display settings in the Bios Setup utilityTo connect an external monitor To use an external monitor To connect an external keyboard or PS/2 mouse To connect a printer To connect a serial device To connect a serial mouseTo connect USB devices For Windows 95, 98, or NT To connect audio devices To make an infrared connection Windows NT 4.0 does not support infrared communicationPrinting to an Infrared Printer Transferring Files with an Infrared Connection Using PC Cards To insert and remove a PC Card Using PC Cards Using Docking Products To install a docking tray To dock the OmniBook To undock the OmniBook Installing a Hard Disk Drive To replace the hard disk drive To replace the hard disk drive holder Installing a RAM Expansion Module Forward onto the front of the case Steps To remove a RAM expansion module Page Configuring the OmniBook Using Bios Setup To run the Bios Setup utility Setting DefaultMain Menu Description System Devices Menu Security Menu Power Menu Boot Menu Exit Menu Using TopTools To install TopToolsTo run TopTools To get more information about TopTools Configuring Security Options To set or change an OmniBook password To delete an OmniBook password To install the VirusScan utility To attach a security cable To set PC identification To enable hard disk drive lock Disk drive Troubleshooting Solving Problems Accessory ProblemsIf you can’t boot from a CD in a CD-ROM drive If a port on a dock isn’t working If the OmniBook redocks after undocking If a DVD drive locks up the computer in Windows Audio Problems If sound is not audibleIf sound doesn’t record Display Problems If the OmniBook is on, but the screen is blankIf the screen is difficult to read If an external monitor doesn’t work Hard Disk Drive Problems If multiple display support doesn’t work in WindowsIf a DVD image doesn’t appear on an external monitor If DVD images don’t play smoothly If you have problems with infrared communications If the hard disk makes buzzing or whining noiseIf files are corrupted Keyboard and Pointing Device Problems If the pointer is difficult to controlIf the touch pad or pointing stick doesn’t work If a special feature on the PS/2 mouse doesn’t work If you can’t type the euro symbolIf the embedded numeric keypad doesn’t work If an external mouse doesn’t work Memory Problems Special pointing stick features stop working after dockingIf a message says you are out of memory PC Card Pcmcia Problems If memory doesn’t increase after adding RAMIf the OmniBook doesn’t recognize a PC Card Performance Problems If an I/O card stops communicating properlyIf the OmniBook gets hot If the OmniBook pauses or runs sluggishly Power and Battery Problems If the OmniBook shuts down slowlyIf the OmniBook turns off immediately after it turns on If the OmniBook keeps beeping If the battery doesn’t charge If the OmniBook stops respondingIf the OmniBook doesn’t suspend as expected Printing Problems If the OmniBook doesn’t automatically hibernate as expectedIf a serial or parallel printer doesn’t print If an infrared printer doesn’t print Serial, Parallel, and USB Problems If the left edge of printed output is missingIf the serial mouse doesn’t work If the serial or parallel port is not working Startup Problems If the OmniBook doesn’t boot from battery powerIf a serial modem doesn’t work properly If the USB port is not working If the OmniBook doesn’t boot from the floppy disk drive Testing the Operation To run the diagnostic test To create a diagnostic floppy disk Space Recovering Software To recover the factory installation of Windows To create a Support Utility Disk To update the OmniBook Bios To replace a damaged Recovery CDExcept for the PC Identification and Password Support and Service Electronic Support Services Getting HP OmniBook AssistanceSupport Assistance Provider Type Type of Assistance Repair Assistance Customer Support CentersHP will not be able to help with questions about North America Central/South AmericaEurope Africa/Middle East Hewlett-Packard Limited Warranty Statement Hewlett-Packard Limited Warranty Statement Specifications and Regulatory Information Hardware Specifications Models with 13-inch displayModels without 900 after serial number Models with 900 B after serial number RAM Security Features Environmental Limits Major ICs Software System Resources System Interrupts System Memory System Input/Output Addresses 100-3FF DMA Channels Safety Information Power CordsCountry Rated Voltage and Current Battery Safety Ergonomics LED Safety Regulatory Information Connections to Peripheral Devices Canada JapanDeclaration of Conformity Safety InternationalAddress OptionsPage Index APM Reference Guide Reference Guide Tattooing, 95 temperature limits Reference Guide