Compaq EXS Series, EX Series manual Using the Cable-Select Feature with Ultra ATA Devices

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When installing additional drives, follow these guidelines:

!For optimal performance, connect hard drives to the primary controller. Connect expansion devices, such as CD-ROM, IDE tape, and diskette drives to the secondary controller.

!You may install either a third-height or a half-height drive into a half-height bay.

!You must install guide screws to ensure that the drive lines up correctly in the drive cage. Compaq has provided extra guide screws, which are installed in the front of the computer chassis, behind the front bezel. Some options require metric hardware. Compaq-supplied metric screws are black.

WARNING: Power is continuous to the system board and power supply even when the power switch is turned off. To prevent damage to the unit, disconnect the power cord from the power source or the unit before beginning disassembly procedures.

Using the Cable-Select Feature with Ultra ATA Devices

Optional drives are available from Compaq in kits that include a special drive cable. The configuration of the drives employs a cable-select feature that identifies the drives as device 0 (primary drive) or device 1 (secondary drive). The system board determines which drive is device 0 or device 1, based on the way the drives are connected to the special drive cable. The device 0 drive is the drive connected to the short segment of the drive cable (or that connector closest to the system board); the device 1 drive is the drive connected to the long segment of the drive cable.

Drive installation requires no jumper setting changes on the existing or optional drives. All Compaq drives have the jumpers preset for cable-select installation.

✎If installing a second device on the primary controller, you must use an 80-conductor Ultra ATA cable for optimal performance. This cable is available as a Compaq option.

Compaq Deskpro EX and Deskpro EXS Series of Personal Computers 4-11

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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 Chapter Product DescriptionComponent/Function Computer FeaturesFront Panel Controls and LEDs Rear Panel Connectors ComponentReference Drive Bay Configuration Drive PositionsSerial Number Location Spare Parts Spare Part Warranty Description Number Tier System UnitMass Storage Devices Cables Standard, Memory, and Expansion Boards Miscellaneous Plastics Kit Keyboards not illustrated Miscellaneous Screw Kit not illustratedDocumentation and Software not illustrated Miscellaneous Parts not illustratedShipping Boxes not illustrated Description Spare Part NumberGenerating Static Removal & Replacement PreliminariesElectrostatic Discharge Information Relative Humidity Event 55% 40% 10%Grounding Workstations Preventing Electrostatic Damage to EquipmentPersonal Grounding Methods and Equipment Method VoltageRecommended Materials and Equipment General Cleaning Safety PrecautionsRoutine Care Cleaning the Monitor Cleaning the Computer CaseCleaning the Keyboard Power Supply Fan Service ConsiderationsCleaning the Mouse Tools and Software RequirementsHard Drives Cables and ConnectorsLithium Coin Cell Battery Removal and Replacement Procedures Disassembly Sequence ChartDisassembly 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 Boards Expansion Board SlotsRemoving 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 AGP Card with a Type I Retention Mechanism Removing an AGP Card13.3 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 Maxtor Definition J50 J48 J46 J44 J42System SpecificationsSpecifications Hardware IRQ System Function System InterruptsSystem DMA Hardware DMA System FunctionICH Fixed I/O Registers Port Register NameICH Fixed I/O Registers Port Register Name System Memory Map Size Memory Address System FunctionDrives MB Diskette DriveUltra ATA Hard Drives 10.0 GB 15.0 GBCD-ROM Drives 48X MaxCompaq Keyboard Scroll MouseIntel 3D Graphics Supported Graphics ResolutionsColor Depth Mode Bits/pixel Refresh Rate Hz NVIDIA M64 ProIndex 2Index