Configuration Byte 2Ah, Hard Drive Timeout | Compaq 850 specification

Chapter 4 System Support

Configuration Byte 29h, Miscellaneous Configuration Data

Default Value = 00h

Bit Function

7..5 Reserved

4Primary Hard Drive Enable (Non-PCI IDE Controllers) 0 = Disable

1 = Enable

3..0 Reserved

Configuration Byte 2Ah, Hard Drive Timeout

Default Value = 02h

Bit	Function

7..5	Reserved
4..0	Hard Drive Timeout (index to SIT timeout record)

Configuration Byte 2Bh, System Inactivity Timeout

Default Value = 23h

Bit	Function

7	Reserved
6,5	Power Conservation Boot
	00	= Reserved
	01	= PC on
	10	= PC off
	11	= Reserved
4..0	System Inactive Timeout. (Index to SIT system timeout
	record)
	00000 = Disabled

Configuration Byte 2Ch, ScreenSave and NUMLOCK Control

Default Value = 00h

	Bit	Function

	7	Reserved
	6	Numlock Control
		0 = Numlock off at power on
		1 = Numlock on at power on

5Screen Blank Control: 0 = No screen blank

1 = Screen blank w/QuickLock

4..0	ScreenSave Timeout. (Index to SIT monitor timeout record)
	000000 = Disabled

4-28Compaq Deskpro EXS and Workstation 300 Personal Computers Featuring the Intel Pentium 4 Processor

First Edition - December 2000

Image 82

Compaq 850 manual Configuration Byte 2Ah, Hard Drive Timeout

Contents

Technical Reference Guide Intel Pentium 4 Processor Intel 850 ChipsetPage TRG Page Reader Feedback Page Technical Reference Guide First Edition -- December Table of Contents Parallel Interface Connector Power Supply and Distribution Appendix B Ascii Character SET Appendix D COMPAQ/NVIDIA TNT2 PRO AGP Graphics Card Appendix H COMPAQ/MATROX Millennium G450 AGP Graphics Card Appendix L COMPAQ/ADAPTEC Scsi Host Adapter List of Figures Figure C-1. Keystroke Processing ELEMENTS, Block Diagram Figure L-3. External Ultra Scsi Connector 50-PIN List of Tables Technical Reference Guide Able H-3 This page is intentionally blank About this Guide Using this GuideIntroduction Additional Information Sources Register Notation and Usage Signal LabelsNotational Conventions BIT Notation Acronyms and Abbreviations Common Acronyms and AbbreviationsAcronym/Abbreviation Description DIP DimmDIN DMA LED LANLCD LIF SEC ScsiSdram Secam System Overview Introduction Standard Feature Difference Matrix Features and OptionsStandard Features Deskpro EXS Deskpro Workstation Options Front Views Mechanical DesignCabinet Layouts Deskpro EXS Deskpro Workstation Shows the rear cabinet layout of the controls and connectors Rear View Back Chassis LayoutFront Board Layout System Board Layout System Architecture ICH2 LPC MCH AGP RdramFWH Pentium 4 Processor Chipset Comparison ChipsetSupport Components Support Component Functions SERIAL, Parallel Interfaces System MemoryMass Storage Universal Serial BUS Interface Matrox Graphics SubsystemStandard AGP Graphics Card Comparison G450 Electrical Specifications SpecificationsEnvironmental Specifications Factory Configuration Audio Subsystem Parameter Desktop Configuration Minitower Configuration Physical SpecificationsDiskette Drive Specifications Compaq SP# Parameter Measurement 48x CD-ROM Drive Specifications SP# 187217-B21Hard Drive Specifications Parameter 18.0 GB 20.0 GB 40.0 GB AGP MCH Processor Memory SubsystemFSB I/F XMM1 XMM2 Rimm Processor Overview CPU FPU FSB Processor Upgrading Sdram Interface Rdram Interface Dual Channel Memory SubsystemDimm Rdram Signal Name Rambus Signal Attributes Each ChannelRambus Attributes Rambus Channel Transactions State Power Refresh Rdram Power ManagementRdram CONFIGURATION/CONTROL Exit Rdram Functionality Shows the system memory map Reset Subsystem ConfigurationHost/PCI Bridge Configuration Registers MCH, Device Config Register Value Egister System Support PCI BUS Overview NIC Eide USB PCI BUS Transactions Configuration Cycles1.1 I/O and Memory Cycles Idsel PCI Component Configuration Access DataPCI Component Vendor/Device ID Bus # Device # Function # PCI Configuration Space Type Bist PCI Bus Mastering Devices PCI BUS Master ArbitrationREQ/GNT Line Device PCI Interrupts PCI Power Management SupportOption ROM Mapping PCI SUB-BUSSES Config Reset PCI ConfigurationLPC Bridge Configuration Registers ICH, Function 0, Device Addr Register Value PCI Bus Connector Pinout PCI ConnectorPin Signal AGP BUS Overview BUS Transactions Data Transfers Data RequestCLK D1A D1B D2A D2B GNT Trdy AGP 2X Transfers GNT Trdy AGP Configuration Config Reset Addr Register Value Ovrcnt GND KEY AGP ConnectorAGP Bus Connector Pinout Trdy Devsel Interrupts System ResourcesMaskable Interrupts Mode Apic ModeMaskable Interrupt Priorities and Assignments Maskable Interrupt Control Registers Non-Maskable InterruptsNMI- Generation Port Register SMI- Generation IOCHK- NMI DMA Channel Assignments And Register Ports Direct Memory AccessDMA Channel Function Port Clock Generation and Distribution REAL-TIME Clock and Configuration MemorySystem Clock Distribution Frequncy Source Destination Clearing Cmos Standard Cmos Locations Cmos Archive and RestoreConfiguration Memory Cmos Map Location Function RTC Control Register A, Byte 0Ah Configuration Byte 0Eh, Diagnostic Status Configuration Byte 13h, Security Functions Bit Function Reserved Configuration Byte 24h, System Board Identification Configuration Byte 27h, Speed Control/External Drive Configuration Byte 2Ah, Hard Drive Timeout Configuration Byte 2Eh, 2Fh, Checksum Configuration Byte 35h, APM Status Flags System Management Power-On PasswordSetup Password Security Functions 1.4 I/O Interface Security Power ManagementCable Lock Provision Acpi Wake-Up Event System Wakes From System Operational Status LED Indications System Boot/ROM Flash Status LED IndicationsSystem Status NUM Lock CAPs Lock Scroll Lock Event Temperature Sensing and Cooling CMD System I/O Map Register MAP and Miscellaneous FunctionsSystem I/O MAP Port Function Gpio Port # Function Direction 2 82801 ICH General Purpose Functions82801 ICH2 Gpio Register Utilization PS LED NIC REQ5 Irqe Irqf Irqg Irqh HD LED 3 I/O Controller Functions Index Function Reset ValueController Control Registers LPC47B357 Gpio Port Utilization 3.1 LPC47B357 Gpio UtilizationFunction Direction System Status Power LED 3.2 LPC47B357 I/O Controller Miscellaneous Functions This page is intentionally blank Enhanced IDE Interface INPUT/OUTPUT InterfacesIDE Programming IDE Bus Master Control Registers IDE Configuration RegistersEide PCI Configuration Registers 82801, Device 31/Function IDE Bus Master Control Registers Pin Primary IDE Connector Pinout IDE ConnectorPin Signal Description Diskette Drive Interface Index Reset Diskette Drive Interface ConfigurationDiskette Drive Interface Configuration Registers Diskette Drive Programming Diskette Drive Interface Control Registers Pri Diskette Drive Connector Pin Diskette Drive Connector Pinout Serial Interface DB-9 Serial Connector Pinout1 RS-232 Interface Serial Interface Configuration Registers Serial Interface ConfigurationSerial Interface Programming Serial Interface Control Registers Serial Interface ControlAddr Register Standard Parallel Port Mode Parallel Interface Enhanced Parallel Port Mode Extended Capabilities Port Mode Parallel Interface Configuration Registers Parallel Interface ConfigurationParallel Interface Programming Parallel Interface Control Registers Parallel Interface ControlAddress Register DB-25 Parallel Connector Pinout Parallel Interface ConnectorPin Signal Function KEYBOARD/POINTING Device Interface Keyboard Interface Operation To-Keyboard Commands Command Pointing Device Interface Operation 3.1 8042 ConfigurationKeyboard Interface Configuration Registers KEYBOARD/POINTING Device Interface Programming Port 60h 3.2 8042 ControlPort 64h CPU Commands To Value Command Description Keyboard/Pointing Device Connector Pinout KEYBOARD/POINTING Device Interface ConnectorData USB Data Formats ICH2 USB Endp USB Programming USB ConfigurationUSB Interface Configuration Registers USB Control USB Cable Data USB ConnectorUSB Connector Pinout USB Cable Length Data Functional Analysis CD ROM TDA Audio Controller SD OUT 3 AC97 Link BUSSync Slot Description Audio Codec Audio Programming Audio ConfigurationAC’97 Audio Controller PCI Configuration Registers Audio Control Audio Subsystem Specifications Audio SpecificationsParamemter Measurement ALERT-ON-LAN Support Network SupportPCI VER .2 Support AOL Events Input/Output Interfaces AOL/SOS Remote System Alert SupportSOS Remote System Alert Events Distribution Power Supply ASSEMBLY/CONTROLAUX Watt Power Supply Assembly Specifications P/N Power Supply AssemblyRange Min. Current Max Surge System State Pressed Power Button Results Power ControlPower Button System Board LED Indications Wake Up Events Power LED IndicationsPower Management Event Wake-On-LAN Conn Pin Power Distribution1 3.3/5/12 VDC Distribution RTN AGP PWR Rimm LOW Voltage PRODUCTION/DISTRIBUTIONVID0 VID1 VID2 VID3 VID4 Board Signal DistributionSystem IDE I/F CD-ROM CD ROM Audio Header P7 Power Button/LED Header P5AOL/SOS Header P12 Bios ROM Bios ROM Upgrading Boot Block CodesROM Flashing Num Lock Cap Lock Scroll Lock Changeable Splash Screen \Flashi.exe ImageFilename BackgroundColor ForegroundColor Boot Device Order Boot FunctionsNetwork Boot F12 Support Boot Error Codes Memory Detection and ConfigurationBoot Error Codes Visual Audible Meaning Setup Utility Functions Setup UtilityHeading Option Description Translation Parameters IDE Disks only Translation Mode IDE disks onlyRemovable Media Boot Multisector Transfers IDE ATA devices only CTRL+ALT+DEL See the Desktop Management Guide for more Setup Utility Functions Setup Utility Functions Setup Utility Functions Client Management Functions Function ModeClient Management Functions INT15 EBX Input EAXOutput ECX Edid Retrieve Temperature StatusSystem ID and ROM Type System System ID ROM Family PnP ID PNP Support Drive Fault PredictionPnP Bios Functions Smart Hard Drive detects imminent failure Smbios IDE Hard Drive Timer Power Management FunctionsSystem Timer Independent PM Support IDE Hard Drive Standby Going to Sleep in Independent PMSystem Standby Suspend Acpi Support APM 1.2 Support APM Bios Functions APM Bios Function Description Staying Awake in APM System/Hard Drive Standby Going to Sleep in APMSystem Suspend Waking Up in APM USB Legacy Support This page is intentionally blank Table A-1 Error Messages and CodesBEEP/KEYBOARD LED Codes Beep/Keyboard LED Codes Error Message Probable Cause POWER-ON Self Test Post MessagesPower-On Self Test Post Messages Table A-2 Table A-3 System Error MessagesSystem Error Messages Message Probable Cause Table A-4 Memory Error MessagesKeyboard Error Messages Table A-5 Table A-6 Printer Error MessagesVideo Graphics Error Messages Table A-7 Table A-8 Diskette Drive Error MessagesSerial Interface Error Messages Table A-9 Modem Communications Error Messages Table A-10 Table A-11 System Status Error MessagesHard Drive Error Messages Table A-12 Table A-13 Table A-14 17 DVD/CD-ROM Error Messages Audio Error MessagesNetwork Interface Error Messages Table A-18 Scsi Interface Error Messages 65xx-xx, 66xx-xxPointing Device Interface Error Messages Table A-19 12Compaq Personal Computers Table B-1 Dec Hex SymbolAscii Character SET Ascii Character Set Appendix B Ascii Character Set Keyboard Appendix C Keyboard Keystroke Processing 1 PS/2-TYPE Keyboard Transmissions Parameter Minimum Nominal Maximum USB-TYPE Keyboard Transmissions Keyboard Layouts Standard Enhanced Keyboards Windows Enhanced Keyboards Figure C-6.National Windows 102W-Key Keyboard Key Positions Easy Access Keyboards Figure C-8.8-Button Easy Access Keyboard Layout Keys Special Single-Keystroke Functions Multi-Keystroke Functions Windows Keystrokes Easy Access Keystrokes Button # Description Default Function Scan Codes Keyboard CommandsKeyboard-to-System Commands Table C-1 Table C-2 Key Make / Break Codes Hex Pos ModeKeyboard Scan Codes Table C-2. Keyboard Scan Codes Key Make / Break Codes Hex Pos 7E/FE 2B/AB Key Connectors Figure C-9.PS/2 Keyboard Cable Connector Male COMPAQ/NVIDIA TNT2 PRO AGP Graphics Card Sgram Nvidia TNT2 2D/VGA Bios ROMFunctional Description RAM DAC Table D-1 Resolution Bits per pixel Color DepthDisplay Modes Nvidia TNT2 Pro Graphics Display Modes Software Support Information Power Management and ConsumptionMonitor Power Management Conditions Table D-2 Table D-3 Monitor ConnectorDB-15 Monitor Connector Pinout SDA 6Compaq Personal Computers Appendix E Compaq/NVIDIA GeForce2 GTS AGP Graphics Card Sdram Nvidia Appendix E Compaq/NVIDIA GeForce2 GTS AGP Graphics Card Table E-1 Nvidia GeForce2 GTS Graphics Display Modes Table E-2 Table E-3 Video In Connector Pinout Video Feature ConnectorTable E-4 COMPAQ/LUCENT V.90 56K PCI Modem Appendix F Compaq/Lucent V.90 56K PCI Modem DSP DAA Transmission Modes Operating ParametersUart Transfer Rates Table F-1 Acpi Environment ConnectorAPM Environment Programming Appendix G COMPAQ/ELSA Gloria Appendix G Compaq/ELSA GLoria II AGP Graphics Card Table G-1 Elsa GLoria II Graphics Display Modes Table G-2 Table G-3 Table G-4 Appendix G Compaq/Matrox Millennium G450 AGP Graphics Card RAM MGA Ramdac MB Sdram Table H-1 Matrox Millennium G450 Graphics Display Modes Table H-2 Table H-3 Video Feature Connector Network Interface Controller Adapters VDC WOL BiosController Type Featured on TX/RX PHY AOL Function Wake UP Functions Ipsec Function Power Management Support Control ConfigurationAdapter Programming Control Registers Adapter Specifications Network ConnectorAdapter Specifications DES/3DES, Hmac SHA-1, MD5 8Compaq Personal Computers COMPAQ/NVIDIA QUADRO2 MXR AGP Graphics Card Sdram Nvidia NV11GL RAM DAC Sdram Table J-1 Nvidia Quadro2 MXR Graphics Display Modes Table J-2 Table F-3 6Compaq Personal Computers Compaq PCI 10/100 Ethernet Adapter AOL/SOS LED SMB CS GND VDCTX/RX AOL Function RSA Function Power Management Support 2 AOL/SOS Connector Figure K-4.AOL/SOS Connector 7-pin Header Smbus Connector WOL Connector Table K-1 COMPAQ/ADAPTEC 29160N Scsi Host Adapter Appendix L Compaq/Adaptec Scsi Host Adapter PCI Scsi Table L-1 Scsi Adapter Programming Scsi Adapter ConfigurationScsi Adapter Control Table L-2 External Ultra Scsi Connector Pinout Scsi ConnectorsExternal 50-PIN Ultra Scsi Connector Table L-3 Internal 50-Pin Ultra Scsi Connector Pinout Internal 50-PIN Ultra Scsi ConnectorTable L-4 Ultra160 Scsi Connector Pinout Internal 68-PIN ULTRA160 Scsi ConnectorTable L-5 Index Dimm support Ipsec Electrical SpecificationsEnvironmental This page is intentionally blank