Compaq EX Series, EXS Series manual System Memory Map, Size Memory Address System Function

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ICH Fixed I/O Registers cont

Port	Register Name
1F0h-1F7h	PIO Mode Command Block Offset for Primary Drive
376h	PIO Mode Control Block Offset for Secondary Drive
3F6h	PIO Mode Control Block Offset for Primary Drive
4D0h	Master PIC Edge/Level Triggered Register
3F6h	PIO Mode Control Block Offset for Primary Drive
4D0h	Master PIC Edge/Level Triggered Register
4D1h	Slave PIC Edge/Level Triggered Register
400-47F	Super I/O
F800-F87F	Reserved (power management)
FA00-FA3F	Reserved (GPIO management)
FC00-FC0F	Reserved (SMBUS controller)

NOTE: When the POS_DEC_EN bit is set, additional I/O ports get positively decoded by the ICH.

6.1.5System Memory Map

Size	Memory Address	System Function
512 KB	FFFFFFFFh to FFF80000	System ROM
3839 MB	FFFBFFFFh to 10000000h	PCI Memory Expansion
511 MB	0FFFFFFFh to 00100000h	HOST or PCI Memory Expansion
128KB	000FFFFFh to 000E0000h	System ROM
96 KB	000DFFFFh to 000C8000h	PCI Option ROMs
32 KB	000C7FFFh to 000C0000h	Video ROM
128 KB	000BFFFFh to 000A0000h	Video RAM
640 KB	0009FFFFh to 00000000h	Base Memory

Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 6-5

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Contents Maintenance & Service Guide Maintenance & Service Guide Maintenance & Service Guide Contents Removal and Replacement Procedures Specifications Technician Notes Symbols and ConventionsAbout this Guide Locating Additional Information Product Description ChapterComponent/Function Computer FeaturesFront Panel Controls and LEDs Component Rear Panel ConnectorsDrive Positions Reference Drive Bay ConfigurationSerial Number Location Spare Parts System Unit Spare Part Warranty Description Number TierMass Storage Devices Cables Standard, Memory, and Expansion Boards Miscellaneous Plastics Kit Miscellaneous Screw Kit not illustrated Keyboards not illustratedDescription Spare Part Number Miscellaneous Parts not illustratedShipping Boxes not illustrated Documentation and Software not illustratedRelative Humidity Event 55% 40% 10% Removal & Replacement PreliminariesElectrostatic Discharge Information Generating StaticMethod Voltage Preventing Electrostatic Damage to EquipmentPersonal Grounding Methods and Equipment Grounding WorkstationsRecommended Materials and Equipment General Cleaning Safety PrecautionsRoutine Care Cleaning the Monitor Cleaning the Computer CaseCleaning the Keyboard Tools and Software Requirements Service ConsiderationsCleaning the Mouse Power Supply FanHard Drives Cables and ConnectorsLithium Coin Cell Battery Disassembly Sequence Chart Removal and Replacement ProceduresDisassembly Preparation Feet Installation Cable Lock Access Panel Front Bezel Power Button Subpanel and Bezel Blanks Power Switch Assembly Drive Positions Using the Cable-Select Feature with Ultra ATA Devices Removing an Internal 3.5-Inch Hard Drive Removing an External 5.25-Inch Drive Removing an External 3.5-Inch Drive Page Expansion Board Slots Expansion BoardsRemoving a PCI Expansion Board Installing a PCI Expansion Board Page DIMMs Memory Module InstallationSystem Memory Page Graphics Cards Installing a GPA/AIMM Card 24Removal & Replacement Procedures Removing an AGP Card AGP Card with a Type I Retention Mechanism13.3 GPA/AIMM Card with a Type 2 Retention Mechanism AGP Card with a Type 2 Retention Mechanism Standard AGP Expansion Card Processor 30Removal & Replacement Procedures System Board Battery Chassis Fan Assembly Power Supply Connectors and Jumpers Connectors and JumpersClearing Cmos Disabling or Clearing the Power-On and Setup Passwords Definition Seagate Quantum Western Digital Hard Drive Jumper SettingsSeagate, Quantum, and Western Digital Definition J50 J48 J46 J44 J42 MaxtorSystem SpecificationsSpecifications Hardware DMA System Function System InterruptsSystem DMA Hardware IRQ System FunctionPort Register Name ICH Fixed I/O RegistersICH Fixed I/O Registers Port Register Name Size Memory Address System Function System Memory MapMB Diskette Drive Drives10.0 GB 15.0 GB Ultra ATA Hard Drives48X Max CD-ROM DrivesScroll Mouse Compaq KeyboardNVIDIA M64 Pro Supported Graphics ResolutionsColor Depth Mode Bits/pixel Refresh Rate Hz Intel 3D GraphicsIndex 2Index