USB-TYPE Keyboard Transmissions | Compaq 850 manual

Appendix C Keyboard

C.2.2 USB-TYPE KEYBOARD TRANSMISSIONS

The USB-type keyboard sends essentially the same information to the system that the PS/2 keyboard does except that the data receives additional NRZI encoding and formatting (prior to leaving the keyboard) to comply with the USB I/F specification (discussed in chapter 5 of this guide).

Packets received at the system’s USB I/F and decoded as originating from the keyboard result in an SMI being generated. An SMI handler routine is invoked that decodes the data and transfers the information to the 8042 keyboard controller where normal (legacy) keyboard processing takes place.

C-4Compaq Personal Computers

Changed - July 2000

Image 180

Compaq 850 manual USB-TYPE Keyboard Transmissions

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 Using this Guide IntroductionAbout this Guide Additional Information Sources Signal Labels Notational ConventionsRegister Notation and Usage BIT Notation Common Acronyms and Abbreviations Acronyms and AbbreviationsAcronym/Abbreviation Description Dimm DINDIP DMA LAN LCDLED LIF Scsi SdramSEC Secam System Overview Introduction Features and Options Standard FeaturesStandard Feature Difference Matrix Deskpro EXS Deskpro Workstation Options Mechanical Design Cabinet LayoutsFront Views Deskpro EXS Deskpro Workstation Shows the rear cabinet layout of the controls and connectors Rear View Chassis Layout BackFront Board Layout System Board Layout System Architecture MCH AGP Rdram ICH2 LPCFWH Pentium 4 Processor Chipset Support ComponentsChipset Comparison Support Component Functions System Memory Mass StorageSERIAL, Parallel Interfaces Universal Serial BUS Interface Graphics Subsystem Standard AGP Graphics Card ComparisonMatrox G450 Specifications Environmental Specifications Factory ConfigurationElectrical Specifications Audio Subsystem Physical Specifications Diskette Drive SpecificationsParameter Desktop Configuration Minitower Configuration Compaq SP# 48x CD-ROM Drive Specifications SP# 187217-B21 Hard Drive SpecificationsParameter Measurement Parameter 18.0 GB 20.0 GB 40.0 GB Processor Memory Subsystem FSB I/FAGP MCH XMM1 XMM2 Rimm Processor Overview CPU FPU FSB Processor Upgrading Memory Subsystem Sdram Interface Rdram Interface Dual ChannelDimm Rdram Rambus Signal Attributes Each Channel Signal NameRambus Attributes Rambus Channel Transactions Rdram Power Management Rdram CONFIGURATION/CONTROLState Power Refresh Exit Rdram Functionality Shows the system memory map Subsystem Configuration Host/PCI Bridge Configuration Registers MCH, DeviceReset Config Register Value Egister System Support PCI BUS Overview NIC Eide USB Configuration Cycles PCI BUS Transactions1.1 I/O and Memory Cycles PCI Component Configuration Access Data IdselPCI Component Vendor/Device ID Bus # Device # Function # PCI Configuration Space Type Bist PCI BUS Master Arbitration PCI Bus Mastering DevicesREQ/GNT Line Device PCI Power Management Support Option ROM MappingPCI Interrupts PCI SUB-BUSSES PCI Configuration LPC Bridge Configuration Registers ICH, Function 0, DeviceConfig Reset Addr Register Value PCI Connector PCI Bus Connector PinoutPin Signal AGP BUS Overview BUS Transactions Data Request Data TransfersCLK D1A D1B D2A D2B GNT Trdy AGP 2X Transfers GNT Trdy AGP Configuration Config Reset Addr Register Value AGP Connector AGP Bus Connector PinoutOvrcnt GND KEY Trdy Devsel System Resources InterruptsMaskable Interrupts Apic Mode ModeMaskable Interrupt Priorities and Assignments Non-Maskable Interrupts NMI- GenerationMaskable Interrupt Control Registers Port Register SMI- Generation IOCHK- NMI Direct Memory Access DMA Channel Assignments And Register PortsDMA Channel Function Port REAL-TIME Clock and Configuration Memory System Clock DistributionClock Generation and Distribution Frequncy Source Destination Clearing Cmos Cmos Archive and Restore Configuration Memory Cmos MapStandard Cmos Locations 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 Power-On Password Setup PasswordSystem Management Security Functions Power Management Cable Lock Provision1.4 I/O Interface Security Acpi Wake-Up Event System Wakes From System Boot/ROM Flash Status LED Indications System StatusSystem Operational Status LED Indications NUM Lock CAPs Lock Scroll Lock Event Temperature Sensing and Cooling CMD Register MAP and Miscellaneous Functions System I/O MAPSystem I/O Map Port Function 2 82801 ICH General Purpose Functions 82801 ICH2 Gpio Register UtilizationGpio Port # Function Direction PS LED NIC REQ5 Irqe Irqf Irqg Irqh HD LED Index Function Reset Value 3 I/O Controller FunctionsController Control Registers 3.1 LPC47B357 Gpio Utilization LPC47B357 Gpio Port UtilizationFunction Direction System Status Power LED 3.2 LPC47B357 I/O Controller Miscellaneous Functions This page is intentionally blank INPUT/OUTPUT Interfaces Enhanced IDE InterfaceIDE Programming IDE Configuration Registers Eide PCI Configuration Registers 82801, Device 31/FunctionIDE Bus Master Control Registers IDE Bus Master Control Registers IDE Connector Pin Primary IDE Connector PinoutPin Signal Description Diskette Drive Interface Diskette Drive Interface Configuration Diskette Drive Interface Configuration RegistersIndex Reset Diskette Drive Programming Diskette Drive Interface Control Registers Pri Diskette Drive Connector Pin Diskette Drive Connector Pinout DB-9 Serial Connector Pinout Serial Interface1 RS-232 Interface Serial Interface Configuration Serial Interface Configuration RegistersSerial Interface Programming Serial Interface Control Serial Interface Control RegistersAddr Register Standard Parallel Port Mode Parallel Interface Enhanced Parallel Port Mode Extended Capabilities Port Mode Parallel Interface Configuration Parallel Interface Configuration RegistersParallel Interface Programming Parallel Interface Control Parallel Interface Control RegistersAddress Register Parallel Interface Connector DB-25 Parallel Connector PinoutPin Signal Function KEYBOARD/POINTING Device Interface Keyboard Interface Operation To-Keyboard Commands Command 3.1 8042 Configuration Keyboard Interface Configuration RegistersPointing Device Interface Operation KEYBOARD/POINTING Device Interface Programming 3.2 8042 Control Port 60hPort 64h CPU Commands To Value Command Description KEYBOARD/POINTING Device Interface Connector Keyboard/Pointing Device Connector PinoutData USB Data Formats ICH2 USB Endp USB Configuration USB Interface Configuration RegistersUSB Programming USB Control USB Connector USB Connector PinoutUSB Cable Data USB Cable Length Data Functional Analysis CD ROM TDA Audio Controller 3 AC97 Link BUS SyncSD OUT Slot Description Audio Codec Audio Configuration AC’97 Audio Controller PCI Configuration RegistersAudio Programming Audio Control Audio Specifications Audio Subsystem SpecificationsParamemter Measurement Network Support PCI VER .2 SupportALERT-ON-LAN Support AOL Events Input/Output Interfaces Remote System Alert Support AOL/SOSSOS Remote System Alert Events Power Supply ASSEMBLY/CONTROL DistributionAUX Power Supply Assembly Watt Power Supply Assembly Specifications P/NRange Min. Current Max Surge Power Control Power ButtonSystem State Pressed Power Button Results System Board LED Indications Power LED Indications Power Management EventWake Up Events Wake-On-LAN Power Distribution 1 3.3/5/12 VDC DistributionConn Pin RTN LOW Voltage PRODUCTION/DISTRIBUTION VID0AGP PWR Rimm VID1 VID2 VID3 VID4 Signal Distribution SystemBoard IDE I/F CD-ROM Power Button/LED Header P5 CD ROM Audio Header P7AOL/SOS Header P12 Bios ROM Bios ROM Boot Block Codes ROM FlashingUpgrading Num Lock Cap Lock Scroll Lock Changeable Splash Screen \Flashi.exe ImageFilename BackgroundColor ForegroundColor Boot Functions Boot Device OrderNetwork Boot F12 Support Memory Detection and Configuration Boot Error CodesBoot Error Codes Visual Audible Meaning Setup Utility Setup Utility FunctionsHeading Option Description Translation Mode IDE disks only Removable Media BootTranslation Parameters IDE Disks only 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 Function Mode Client Management FunctionsClient Management Functions INT15 Input EAX OutputEBX ECX Temperature Status System ID and ROM TypeEdid Retrieve System System ID ROM Family PnP ID Drive Fault Prediction PnP Bios FunctionsPNP Support Smart Hard Drive detects imminent failure Smbios Power Management Functions System TimerIDE Hard Drive Timer Independent PM Support Going to Sleep in Independent PM System StandbyIDE Hard Drive Standby Suspend Acpi Support APM 1.2 Support APM Bios Functions APM Bios Function Description Staying Awake in APM Going to Sleep in APM System/Hard Drive StandbySystem Suspend Waking Up in APM USB Legacy Support This page is intentionally blank Error Messages and Codes BEEP/KEYBOARD LED CodesTable A-1 Beep/Keyboard LED Codes POWER-ON Self Test Post Messages Power-On Self Test Post MessagesError Message Probable Cause Table A-2 System Error Messages System Error MessagesTable A-3 Message Probable Cause Memory Error Messages Keyboard Error MessagesTable A-4 Table A-5 Printer Error Messages Video Graphics Error MessagesTable A-6 Table A-7 Diskette Drive Error Messages Serial Interface Error MessagesTable A-8 Table A-9 Modem Communications Error Messages Table A-10 System Status Error Messages Hard Drive Error MessagesTable A-11 Table A-12 Table A-13 Table A-14 Audio Error Messages 17 DVD/CD-ROM Error MessagesNetwork Interface Error Messages Scsi Interface Error Messages 65xx-xx, 66xx-xx Pointing Device Interface Error MessagesTable A-18 Table A-19 12Compaq Personal Computers Dec Hex Symbol Ascii Character SETTable B-1 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 Keyboard Commands Keyboard-to-System CommandsScan Codes Table C-1 Key Make / Break Codes Hex Pos Mode Table C-2Keyboard 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 Bios ROM Functional Description2D/VGA RAM DAC Resolution Bits per pixel Color Depth Display ModesTable D-1 Nvidia TNT2 Pro Graphics Display Modes Power Management and Consumption Monitor Power Management ConditionsSoftware Support Information Table D-2 Monitor Connector DB-15 Monitor Connector PinoutTable D-3 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 Feature Connector Video In Connector PinoutTable E-4 COMPAQ/LUCENT V.90 56K PCI Modem Appendix F Compaq/Lucent V.90 56K PCI Modem DSP DAA Operating Parameters Uart Transfer RatesTransmission Modes Table F-1 Connector APM EnvironmentAcpi 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 WOL Bios Controller Type Featured onVDC TX/RX PHY AOL Function Wake UP Functions Ipsec Function Power Management Support Configuration Adapter ProgrammingControl Control Registers Network Connector Adapter SpecificationsAdapter 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 GND VDC SMB CSTX/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 Scsi Adapter Programming Scsi Adapter Configuration Scsi Adapter ControlTable L-1 Table L-2 Scsi Connectors External 50-PIN Ultra Scsi ConnectorExternal Ultra Scsi Connector Pinout Table L-3 Internal 50-PIN Ultra Scsi Connector Internal 50-Pin Ultra Scsi Connector PinoutTable L-4 Internal 68-PIN ULTRA160 Scsi Connector Ultra160 Scsi Connector PinoutTable L-5 Index Dimm support Ipsec Specifications ElectricalEnvironmental This page is intentionally blank