Compaq EN Series manuals
Computer Equipment > Personal Computer
When we buy new device such as Compaq EN Series we often through away most of the documentation but the warranty.
Very often issues with Compaq EN Series begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Personal Computer Compaq EN Series is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Personal Computer on our side using links below.
237 pages 1011.08 Kb
4 NOTICE6 TABLE OF CONTENTS Technical Reference Guide viii Compaq Deskpro EN Series of Personal Computers Desktop and Minitower Form Factors 11 LIST OF FIGURES13 LIST OF TABLES16 Chapter 1 INTRODUCTION1. Chapter 1 INTRODUCTION 1.1 ABOUT THIS GUIDE 1.1.1 USING THIS GUIDE 1.1.2 ADDITIONAL INFORMATION SOURCES 18 1.3 COMMON ACRONYMS AND ABBREVIATIONS19 Chapter 1 Introduction Compaq Deskpro EN Series of Personal Computers Desktop and Minitower Form Factors 1-4 Table 1-1. Acronyms and Abbreviations 20 1-5Table 1-1. Acronyms and Abbreviations 21 Chapter 1 Introduction Compaq Deskpro EN Series of Personal Computers Desktop and Minitower Form Factors 1-6 Table 1-1. Acronyms and Abbreviations 22 Chapter 2 SYSTEM OVERVIEW50 Chapter 4 SYSTEM SUPPORT4. Chapter 4 SYSTEM SUPPORT 4.1 INTRODUCTION 51 4.2 PCI BUS OVERVIEW52 4.2.1 PCI CONNECTOR53 4.2.2 PCI BUS MASTER ARBITRATION54 4.2.3 PCI BUS TRANSACTIONS4.2.3.1 I/O and Memory Cycles 4.2.3.2 Configuration Cycles 57 4.2.3.3 Special Cycles4.2.4 OPTION ROM MAPPING 58 4.2.5 PCI INTERRUPT MAPPING4.2.6 PCI POWER MANAGEMENT SUPPORT 59 4.2.7 PCI CONFIGURATION60 4.3 AGP BUS OVERVIEW4.3.1 BUS TRANSACTIONS 61 4.3.1.1 Data Request4.3.1.2 Data Transfers 63 4.3.2 AGP CONFIGURATION64 4.3.3 AGP CONNECTOR65 4.4 ISA BUS OVERVIEW66 4.4.1 ISA CONNECTOR67 4.4.2 ISA BUS TRANSACTIONS69 4.4.3 DIRECT MEMORY ACCESS70 4.4.3.1 Page Registers71 4.4.3.2 DMA Controller Registers72 4.4.4 INTERRUPTS4.4.4.1 Maskable Interrupts 74 4.4.4.2 Non-Maskable InterruptsNMI- Generation 75 SMI- Generation76 4.4.5 INTERVAL TIMER4.4.6 ISA CONFIGURATION 77 4.5 SYSTEM CLOCK DISTRIBUTION78 4.6 REAL-TIME CLOCK AND CONFIGURATION MEMORY80 4-31RTC Control Register A, Byte 0Ah RTC Control Register B, Byte 0B h RTC Status Register C, Byte 0Ch RTC Status Register D, Byte 0Dh 84 4-35Configuration Byte 26h, Auxiliary Peripheral Configuration Configuration Byte 27h, Speed Control/External Drive Configuration Byte 28h, Expanded and Base Memory, IRQ12 Select 85 Chapter 4 System Support4-36 Desktop and Minitower Form Factors Configuration Byte 29h, Miscellaneous Configuration Data Configuration Byte 2Ah, Hard Drive Timeout Configuration Byte 2Bh, System Inactivity Timeout Configuration Byte 2Ch, ScreenSave and NUMLOCK Control 92 4-43Configuration Byte 94h, ROM Flash/Power Button Status Configuration Byte 97h, Asset/Test Prompt Byte Configuration Byte 9Bh, Ultra-33 DMA Enable Byte Configuration Byte 9Ch, Mode-2 Configuration Byte Chapter 4 System Support 4-46 Desktop and Minitower Form Factors 95 4.7 I/O MAP AND REGISTER ACCESSING 4.7.1 SYSTEM I/O MAPTable 419. System I/O Map Table 4-19. System I/O Map 96 4.7.2 GPIO UTILIZATION4.7.2.1 82371 South Bridge GPIO Utilization 98 4.7.2.2 87307 I/O Controller Functions99 87307 GPIO Utilization100 4.8 SYSTEM MANAGEMENT SUPPORT101 4.8.1 FLASH ROM WRITE PROTECT4.8.2 PASSWORD PROTECTION 102 4.8.3 I/O SECURITY4.8.4 USER SECURITY 103 4.8.5 TEMPERATURE SENSING104 4.8.6 SMART COVER LOCK4.8.7 SMART COVER REMOVAL SENSOR 105 4.8.8 POWER MANAGEMENT4.8.8.1 Power Button 4.8.8.2 Fan Control 106 4.8.8.3 Hard Drive Spindown Control4.8.8.4 Monitor P o wer Control 108 Chapter 5 INPUT/OUTPUT INTERFACES144 Chapter 6 AUDIO SUBSYSTEM156 Chapter 7 POWER and SIGNAL DISTRIBUTION164 Chapter 8 BIOS ROM188 Appendix A ERROR MESSAGES AND CODES200 Appendix B ASCII CHARACTER SETB. Appendix B ASCII CHARACTER SET B.1 INTRODUCTION 202 Appendix C KEYBOARD214 Appendix D COMPAQ 10/100 TX PCI INTEL WOL UTP CONTROLLER CARD220 Appendix E WIDE ULTRA SCSI HOST ADAPTER226 Appendix F ATI RAGE PRO AGP GRAPHICS CARDS234 INDEX
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