Compaq Deskpro 4000N and 4000S Personal Computers
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Deskpro 4000N and 4000S Personal Computers TRG
Technical Reference Guide
NOTICE
The information in this document is subject to change without notice.
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Technical Reference Guide for
Compaq Deskpro 4000N and 4000S Personal Computers
First Edition - September 1997
Document Number DSK-109A/0907
Compaq Deskpro 4000N and 4000S Personal Computers i
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Technical Reference Guide
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Technical Reference Guide
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION.............................................................................................................
1.1 ABOUT THIS GUIDE ........................................................................................................... 1-1
1.1.1 USING THIS GUIDE ..................................................................................................... 1-1
1.1.2 ADDITIONAL INFORMATION SOURCES.................................................................. 1-1
1.2 NOTATIONAL CONVENTIONS.......................................................................................... 1-2
1.2.1 VALUES ........................................................................................................................ 1-2
1.2.2 RANGES........................................................................................................................ 1-2
1.2.3 SIGNAL LABELS.......................................................................................................... 1-2
1.2.4 REGISTER NOTATION AND USAGE ......................................................................... 1-2
1.2.5 BIT NOTATION ............................................................................................................ 1-2
1.3 COMMON ACRONYMS AND ABBREVIATIONS.............................................................. 1-3
CHAPTER 2 SYSTEM OVERVIEW.....................................................................................................
2.1 INTRODUCTION .................................................................................................................. 2-1
2.2 FEATURES ........................................................................................................................... 2-2
2.2.1 STANDARD FEATURES .............................................................................................. 2-2
2.2.2 MODEL DIFFERENCES ............................................................................................... 2-3
2.2.3 OPTIONS ....................................................................................................................... 2-3
2.3 MECHANICAL DESIGN ...................................................................................................... 2-4
2.3.1 CABINET LAYOUT...................................................................................................... 2-4
2.3.2 CHASSIS LAYOUT....................................................................................................... 2-6
2.3.3 SYSTEM BOARD LAYOUT ......................................................................................... 2-7
2.4 SYSTEM ARCHITECTURE.................................................................................................. 2-8
2.4.1 MICROPROCESSOR ................................................................................................... 2-10
2.4.2 MEMORY .................................................................................................................... 2-10
2.4.3 SUPPORT CHIPSET .................................................................................................... 2-11
2.4.4 MASS STORAGE ........................................................................................................ 2-11
2.4.5 SERIAL AND PARALLEL INTERFACES .................................................................. 2-11
2.4.6 UNIVERSAL SERIAL BUS INTERFACE ................................................................... 2-12
2.4.7 GRAPHICS SUBSYSTEM ........................................................................................... 2-12
2.5 SPECIFICATIONS .............................................................................................................. 2-13
CHAPTER 3 PROCESSOR/MEMORY SUBSYSTEM ........................................................................
3.1 INTRODUCTION .................................................................................................................. 3-1
3.2 PENTIUM MMX-BASED PROCESSOR/MEMORY SUBSYSTEM..................................... 3-2
3.2.1 PENTIUM MMX MICROPROCESSOR......................................................................... 3-3
3.2.2 BUS/PROCESSING SPEED SELECT............................................................................ 3-4
3.2.3 SECONDARY (L2) CACHE MEMORY ........................................................................ 3-4
3.2.4 SYSTEM MEMORY...................................................................................................... 3-5
3.2.5 SUBSYSTEM CONFIGURATION................................................................................. 3-8
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CHAPTER 4 SYSTEM SUPPORT.........................................................................................................
4.1 INTRODUCTION .................................................................................................................. 4-1
4.2 PCI BUS OVERVIEW ........................................................................................................... 4-2
4.2.1 PCI CONNECTOR......................................................................................................... 4-3
4.2.2 PCI BUS MASTER ARBITRATION.............................................................................. 4-4
4.2.3 PCI BUS TRANSACTIONS........................................................................................... 4-5
4.2.4 OPTION ROM MAPPING ............................................................................................. 4-8
4.2.5 PCI INTERRUPT MAPPING ......................................................................................... 4-9
4.2.6 PCI CONFIGURATION............................................................................................... 4-10
4.3 ISA BUS OVERVIEW......................................................................................................... 4-11
4.3.1 ISA CONNECTOR ...................................................................................................... 4-12
4.3.2 ISA BUS TRANSACTIONS......................................................................................... 4-13
4.3.3 DIRECT MEMORY ACCESS...................................................................................... 4-15
4.3.4 INTERRUPTS .............................................................................................................. 4-18
4.3.5 INTERVAL TIMER..................................................................................................... 4-22
4.3.6 ISA CONFIGURATION............................................................................................... 4-22
4.4 SYSTEM CLOCK DISTRIBUTION .................................................................................... 4-23
4.5 REAL-TIME CLOCK AND CONFIGURATION MEMORY............................................... 4-24
4.5.1 CONFIGURATION MEMORY BYTE DEFINITIONS ................................................ 4-25
4.6 I/O MAP AND REGISTER ACCESSING............................................................................ 4-41
4.6.1 SYSTEM I/O MAP ...................................................................................................... 4-41
4.6.2 87307 I/O CONTROLLER CONFIGURATION ........................................................... 4-42
4.7 SYSTEM MANAGEMENT SUPPORT ............................................................................... 4-44
4.7.1 FLASH ROM WRITE PROTECT ................................................................................ 4-44
4.7.2 PASSWORD PROTECTION........................................................................................ 4-45
4.7.3 I/O SECURITY ............................................................................................................ 4-46
4.7.4 USER SECURITY........................................................................................................ 4-46
4.7.5 TEMPERATURE SENSING ........................................................................................ 4-47
4.7.6 POWER MANAGEMENT ........................................................................................... 4-48
CHAPTER 5 INPUT/OUTPUT INTERFACES .....................................................................................
5.1 INTRODUCTION .................................................................................................................. 5-1
5.2 ENHANCED IDE INTERFACE ............................................................................................ 5-1
5.2.1 IDE PROGRAMMING................................................................................................... 5-1
5.2.2 IDE CONNECTORS ...................................................................................................... 5-8
5.3 DISKETTE DRIVE INTERFACE........................................................................................ 5-10
5.3.1 DISKETTE DRIVE PROGRAMMING ........................................................................ 5-11
5.3.2 DISKETTE DRIVE CONNECTOR.............................................................................. 5-14
5.4 SERIAL INTERFACES ....................................................................................................... 5-15
5.4.1 RS-232 INTERFACE ................................................................................................... 5-15
5.4.2 SERIAL INTERFACE PROGRAMMING .................................................................... 5-16
5.5 PARALLEL INTERFACE ................................................................................................... 5-21
5.5.1 STANDARD PARALLEL PORT MODE ..................................................................... 5-21
5.5.2 ENHANCED PARALLEL PORT MODE ..................................................................... 5-22
5.5.3 EXTENDED CAPABILITIES PORT MODE ............................................................... 5-22
5.5.4 PARALLEL INTERFACE PROGRAMMING .............................................................. 5-23
5.5.5 PARALLEL INTERFACE CONNECTOR ................................................................... 5-27
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5.6 KEYBOARD/POINTING DEVICE INTERFACE ............................................................... 5-28
5.6.1 KEYBOARD INTERFACE OPERATION ................................................................... 5-28
5.6.2 POINTING DEVICE INTERFACE OPERATION ....................................................... 5-30
5.6.3 KEYBOARD/POINTING DEVICE INTERFACE PROGRAMMING ......................... 5-30
5.6.4 KEYBOARD/POINTING DEVICE INTERFACE CONNECTOR................................ 5-34
5.7 ETHERNET INTERFACE................................................................................................... 5-35
5.7.1 NIC CONFIGURATION/CONTROL ........................................................................... 5-36
5.7.2 NIC CONNECTORS.................................................................................................... 5-36
5.8 UNIVERSAL SERIAL BUS INTERFACE........................................................................... 5-37
5.8.1 USB CONFIGURATION.............................................................................................. 5-37
5.8.2 USB CONTROL........................................................................................................... 5-38
5.8.3 USB CONNECTOR ..................................................................................................... 5-38
CHAPTER 6 GRAPHICS SUBSYSTEM...............................................................................................
6.1 INTRODUCTION .................................................................................................................. 6-1
6.2 SUBSYSTEM DESCRIPTION .............................................................................................. 6-2
6.2.1 S3 TRIO64V2/GX GRAPHICS CONTROLLER ........................................................... 6-2
6.2.2 S3 TRIO64V2/GX GRAPHICS CONFIGURATIONS ................................................... 6-3
6.2.3 S3 TRIO64V2/GX GRAPHICS SUBSYSTEM PROGRAMMING................................. 6-4
6.2.4 MONITOR POWER CONTROL .................................................................................... 6-5
6.2.5 CONNECTORS ............................................................................................................. 6-6
CHAPTER 7 POWER SUPPLY AND DISTRIBUTION.......................................................................
7.1 INTRODUCTION .................................................................................................................. 7-1
7.2 POWER SUPPLY ASSEMBLY/CONTROL .......................................................................... 7-1
7.2.1 POWER SUPPLY ASSEMBLY...................................................................................... 7-2
7.2.2 POWER CONTROL....................................................................................................... 7-3
7.3 POWER DISTRIBUTION...................................................................................................... 7-4
7.3.1 3.5/5/12 VDC DISTRIBUTION...................................................................................... 7-4
7.3.2 LOW VOLTAGE DISTRIBUTION................................................................................ 7-5
7.4 SIGNAL DISTRIBUTION ..................................................................................................... 7-6
CHAPTER 8 BIOS ROM .......................................................................................................................
8.1 INTRODUCTION .................................................................................................................. 8-1
8.2 BOOT FUNCTIONS.............................................................................................................. 8-2
8.2.1 BOOT BLOCK............................................................................................................... 8-2
8.2.2 QUICKBOOT................................................................................................................. 8-2
8.2.3 SILENTBOOT ............................................................................................................... 8-2
8.3 ACCESSING CONFIGURATION MEMORY ....................................................................... 8-3
8.3.1 ACCESSING CMOS...................................................................................................... 8-3
8.3.2 SETTING DEFAULT PARAMETERS .......................................................................... 8-3
8.3.3 ACCESSING CMOS FEATURE BITS........................................................................... 8-4
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8.4 CLIENT MANAGEMENT SUPPORT................................................................................... 8-5
8.4.1 SYSTEM ID................................................................................................................... 8-7
8.4.2 SYSTEM INFORMATION TABLE ............................................................................... 8-7
8.4.3 TEMPERATURE SENSOR.......................................................................................... 8-12
8.4.4 DRIVE FAULT PREDICTION..................................................................................... 8-12
8.4.5 DIMM SUPPORT......................................................................................................... 8-13
8.4.6 SECURITY FUNCTIONS ............................................................................................ 8-15
8.4.7 ACCESSING CMOS FEATURE BITS......................................................................... 8-16
8.5 PNP SUPPORT .................................................................................................................... 8-17
8.6 POWER MANAGEMENT SUPPORT ................................................................................. 8-18
APPENDIX A ERROR MESSAGES AND CODES.............................................................................A
A.1 INTRODUCTION ................................................................................................................. A-1
A.2 POWER-ON MESSAGES..................................................................................................... A-1
A.3 BEEP CODE MESSAGES.................................................................................................... A-1
A.4 POWER-ON SELF TEST (POST) MESSAGES.................................................................... A-2
A.5 PROCESSOR ERROR MESSAGES (1XX-XX) ...................................................................... A-3
A.6 MEMORY ERROR MESSAGES (2XX-XX)........................................................................... A-4
A.7 KEYBOARD ERROR MESSAGES (30X-XX) ....................................................................... A-4
A.8 PRINTER ERROR MESSAGES (4XX-XX) ............................................................................ A-5
A.9 VIDEO (GRAPHICS) ERROR MESSAGES (5XX-XX) .......................................................... A-5
A.10 DISKETTE DRIVE ERROR MESSAGES (6XX-XX) ......................................................... A-6
A.11 SERIAL INTERFACE ERROR MESSAGES (11XX-XX) ................................................... A-6
A.12 MODEM COMMUNICATIONS ERROR MESSAGES (12XX-XX).................................... A-7
A.13 HARD DRIVE ERROR MESSAGES (17XX-XX) ............................................................... A-8
A.14 HARD DRIVE ERROR MESSAGES (19XX-XX) ............................................................... A-9
A.15 VIDEO (GRAPHICS) ERROR MESSAGES (24XX-XX) .................................................... A-9
A.16 AUDIO ERROR MESSAGES (3206-XX)......................................................................... A-10
A.17 NETWORK INTERFACE ERROR MESSAGES (60XX-XX) ........................................... A-10
A.18 SCSI INTERFACE ERROR MESSAGES (65XX-XX, 66XX-XX, 67XX-XX) ....................... A-11
A.19 POINTING DEVICE INTERFACE ERROR MESSAGES (8601-XX).............................. A-11
A.20 CEMM PRIVILEDGED OPS ERROR MESSAGES........................................................ A-12
A.21 CEMM EXCEPTION ERROR MESSAGES ................................................................... A-12
APPENDIX B ASCII CHARACTER SET .............................................................................................
B.1 INTRODUCTION .................................................................................................................. B-1
APPENDIX C KEYBOARD ...................................................................................................................
C.1 INTRODUCTION ..................................................................................................................C-1
C.2 KEYSTROKE PROCESSING................................................................................................C-2
C.2.1 TRANSMISSIONS TO THE SYSTEM ..........................................................................C-3
C.2.2 KEYBOARD LAYOUTS ...............................................................................................C-4
C.2.3 KEYS .............................................................................................................................C-7
C.2.4 KEYBOARD COMMANDS.........................................................................................C-10
C.2.5 SCAN CODES ............................................................................................................. C-10
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C.3 SCANNER DESCRIPTION .................................................................................................C-14
C.3.1 SCANNER OPERATION.............................................................................................C-15
C.3.2 SCANNER INTERFACE .............................................................................................C-18
C.3.3 SCANNER SPECIFICATIONS/REQUIREMENTS......................................................C-20
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LIST OF FIGURES
FIGURE 21. COMPAQ DESKPRO 4000S PERSONAL COMPUTER WITH MONITOR....................................... 2-1
FIGURE 22. CABINET LAYOUT, FRONT VIEW ....................................................................................... 2-4
FIGURE 23. CABINET LAYOUT, REAR VIEW ......................................................................................... 2-5
FIGURE 24. CHASSIS LAYOUT, TOP VIEW ............................................................................................ 2-6
FIGURE 25. SYSTEM BOARD LAYOUT, COMPONENT SIDE ..................................................................... 2-7
FIGURE 26. COMPAQ DESKPRO 4000N AND 4000S SYSTEM ARCHITECTURE, BLOCK DIAGRAM.............. 2-9
FIGURE 27. MICROPROCESSOR ARCHITECTURAL DIAGRAM ................................................................ 2-10
FIGURE 31. PROCESSOR/MEMORY SUBSYSTEM ARCHITECTURE ............................................................ 3-2
FIGURE 32. PENTIUM MMX MICROPROCESSOR INTERNAL ARCHITECTURE ........................................... 3-3
FIGURE 33. SYSTEM MEMORY MAP....................................................................................................... 3-7
FIGURE 41. PCI BUS DEVICES AND FUNCTIONS..................................................................................... 4-2
FIGURE 42. 32-BIT PCI BUS CONNECTOR (32-BIT TYPE) ..................................................................... 4-3
FIGURE 43. TYPE 0 CONFIGURATION CYCLE........................................................................................ 4-6
FIGURE 44. PCI CONFIGURATION SPACE MAP...................................................................................... 4-7
FIGURE 45. ISA BUS BLOCK DIAGRAM................................................................................................ 4-11
FIGURE 46. ISA EXPANSION CONNECTOR.......................................................................................... 4-12
FIGURE 47. MASKABLE INTERRUPT PROCESSING, BLOCK DIAGRAM.................................................... 4-18
FIGURE 48. CONFIGURATION MEMORY MAP...................................................................................... 4-24
FIGURE 51. 40-PIN IDE CONNECTOR. ................................................................................................. 5-8
FIGURE 51. 50-PIN IDE CONNECTOR. ................................................................................................. 5-9
FIGURE 52. 34-PIN DISKETTE DRIVE CONNECTOR.............................................................................. 5-14
FIGURE 53. SERIAL INTERFACES BLOCK DIAGRAM ............................................................................. 5-15
FIGURE 54. SERIAL INTERFACE CONNECTOR (MALE DB-9 AS VIEWED FROM REAR OF CHASSIS) ........... 5-15
FIGURE 55. PARALLEL INTERFACE CONNECTOR (FEMALE DB-25 AS VIEWED FROM REAR OF CHASSIS) .. 5-27
FIGURE 56. 8042-TO-KEYBOARD TRANSMISSION OF CODE EDH, TIMING DIAGRAM............................ 5-28
FIGURE 57. KEYBOARD OR POINTING DEVICE INTERFACE CONNECTOR............................................... 5-34
FIGURE 58. ETHERNET INTERFACE BLOCK DIAGRAM ......................................................................... 5-35
FIGURE 59. ETHERNET AUI CONNECTOR (DB-15, VIEWED FROM REAR) ............................................. 5-36
FIGURE 510. ETHERNET RJ-45 CONNECTOR ...................................................................................... 5-36
FIGURE 511. UNIVERSAL SERIAL BUS CONNECTOR (ONE OF TWO AS VIEWED FROM REAR OF CHASSIS)... 5-38
FIGURE 61. S3 TRIO64V2/GX-BASED GRAPHICS SUBSYSTEM, BLOCK DIAGRAM................................... 6-2
FIGURE 62. VGA MONITOR CONNECTOR, (FEMALE DB-15, AS VIEWED FROM THE REAR OF CHASSIS). ... 6-6
FIGURE 71. POWER SUPPLY ASSEMBLY, BLOCK DIAGRAM.................................................................... 7-1
FIGURE 72. POWER CABLE DIAGRAM .................................................................................................. 7-4
FIGURE 73. LOW VOLTAGE SUPPLY, BLOCK DIAGRAM......................................................................... 7-5
FIGURE 74. SIGNAL DISTRIBUTION DIAGRAM....................................................................................... 7-6
FIGURE C1. KEYSTROKE PROCESSING ELEMENTS, BLOCK DIAGRAM ....................................................C-2
FIGURE C2. KEYBOARD-TO-SYSTEM TRANSMISSION OF CODE 58H, TIMING DIAGRAM..........................C-3
FIGURE C3. U.S. ENGLISH (101-KEY) KEYBOARD KEY POSITIONS.......................................................C-4
FIGURE C4. NATIONAL (102-KEY) KEYBOARD KEY POSITIONS ............................................................C-4
FIGURE C5. U.S. ENGLISH WINDOWS (101W-KEY) KEYBOARD KEY POSITIONS ...................................C-5
FIGURE C6. NATIONAL WINDOWS (102W-KEY) KEYBOARD KEY POSITIONS ........................................C-5
FIGURE C7. U.S. ENGLISH WINDOWS (101WE-KEY) KEYBOARD KEY POSITIONS.................................C-6
FIGURE C8. NATIONAL WINDOWS (102WE-KEY) KEYBOARD KEY POSITIONS......................................C-6
FIGURE C9. SCANNER ELEMENTS, BLOCK DIAGRAM..........................................................................C-14
FIGURE C10. SCANNER OPERATION FLOW CHART ..............................................................................C-16
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LIST OF TABLES
TABLE 11. ACRONYMS AND ABBREVIATIONS....................................................................................... 1-3
TABLE 21. ARCHITECTURAL COMPARISON............................................................................................. 2-8
TABLE 22. SUPPORT CHIPSETS .......................................................................................................... 2-11
TABLE 23. GRAPHICS SUBSYSTEM OVERVIEW.................................................................................... 2-12
TABLE 24. ENVIRONMENTAL SPECIFICATIONS.................................................................................... 2-13
TABLE 25. ELECTRICAL SPECIFICATIONS ........................................................................................... 2-13
TABLE 26. PHYSICAL SPECIFICATIONS ............................................................................................... 2-13
TABLE 27. DISKETTE DRIVE SPECIFICATIONS..................................................................................... 2-14
TABLE 28. 8X CD-ROM DRIVE SPECIFICATIONS................................................................................ 2-14
TABLE 29. HARD DRIVE SPECIFICATIONS........................................................................................... 2-15
TABLE 31. PROCESSOR/MEMORY ARCHITECTURAL HIGHLIGHTS ............................................................ 3-1
TABLE 32. PENTIUM MMX MICROPROCESSOR BUS/CORE SPEED SWITCH SETTINGS ............................. 3-4
TABLE 33. SW1 BUS/CORE SPEED POSITIONS TO GPIO ASSIGNMENTS................................................... 3-4
TABLE 34. SDRAM PERFORMANCE TIMES............................................................................................ 3-5
TABLE 35. SPD ADDRESS MAP (SDRAM DIMM)................................................................................. 3-6
TABLE 36. HOST/PCI BRIDGE CONFIGURATION REGISTERS (VT82C595) .............................................. 3-8
TABLE 41. 32-BIT PCI BUS CONNECTOR PINOUT................................................................................. 4-3
TABLE 42. PCI BUS MASTERING DEVICES ........................................................................................... 4-4
TABLE 43. PCI DEVICE CONFIGURATION ACCESS ................................................................................ 4-6
TABLE 44. PCI FUNCTION CONFIGURATION ACCES.............................................................................. 4-7
TABLE 45. PCI DEVICE IDENTIFICATION ............................................................................................. 4-8
TABLE 46. PCI/ISA BRIDGE CONFIGURATION REGISTERS FOR THE VT82C586 (P55C-BASED SYSTEMS)4-10
TABLE 47. ISA EXPANSION CONNECTOR PINOUT............................................................................... 4-12
TABLE 48. DEFAULT DMA CHANNEL ASSIGNMENTS ......................................................................... 4-15
TABLE 49. DMA PAGE REGISTER ADDRESSES ................................................................................... 4-16
TABLE 410. DMA CONTROLLER REGISTERS...................................................................................... 4-17
TABLE 411. MASKABLE INTERRUPT PRIORITIES AND ASSIGNMENTS.................................................... 4-19
TABLE 412. MASKABLE INTERRUPT CONTROL REGISTERS.................................................................. 4-19
TABLE 413. INTERVAL TIMER FUNCTIONS ......................................................................................... 4-22
TABLE 414. INTERVAL TIMER CONTROL REGISTERS........................................................................... 4-22
TABLE 415. CLOCK GENERATION AND DISTRIBUTION (PENTIUM-BASED SYSTEM)............................... 4-23
TABLE 416. CONFIGURATION MEMORY (CMOS) MAP....................................................................... 4-25
TABLE 417. SYSTEM I/O MAP........................................................................................................... 4-41
TABLE 418. 87307 I/O CONTROLLER PNP STANDARD CONTROL REGISTERS ........................................ 4-42
TABLE 419. SYSTEM MANAGEMENT CONTROL REGISTERS ................................................................... 4-44
TABLE 51. IDE PCI CONFIGURATION REGISTERS ................................................................................ 5-2
TABLE 52. IDE BUS MASTER CONTROL REGISTERS ............................................................................. 5-2
TABLE 53. IDE ATA CONTROL REGISTERS......................................................................................... 5-3
TABLE 54. IDE CONTROLLER COMMANDS .......................................................................................... 5-6
TABLE 55. 40-PIN IDE CONNECTOR PINOUT ....................................................................................... 5-8
TABLE 56. 40-PIN IDE CONNECTOR PINOUT ....................................................................................... 5-9
TABLE 57. DISKETTE DRIVE CONTROLLER CONFIGURATION REGISTERS ............................................. 5-11
TABLE 58. DISKETTE DRIVE CONTROLLER REGISTERS ....................................................................... 5-12
TABLE 59. 34-PIN DISKETTE DRIVE CONNECTOR PINOUT................................................................... 5-14
TABLE 510. DB-9 SERIAL CONNECTOR PINOUT ................................................................................. 5-15
TABLE 511. SERIAL INTERFACE CONFIGURATION REGISTERS.............................................................. 5-16
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TABLE 512. SERIAL INTERFACE CONTROL REGISTERS ........................................................................ 5-17
TABLE 513. PARALLEL INTERFACE CONFIGURATION REGISTERS......................................................... 5-23
TABLE 514. PARALLEL INTERFACE CONTROL REGISTERS ................................................................... 5-24
TABLE 515. DB-25 PARALLEL CONNECTOR PINOUT .......................................................................... 5-27
TABLE 516. 8042-TO-KEYBOARD COMMANDS .................................................................................. 5-29
TABLE 517. KEYBOARD/MOUSE INTERFACE CONFIGURATION REGISTERS ........................................... 5-30
TABLE 518. CPU COMMANDS TO THE 8042...................................................................................... 5-32
TABLE 519. KEYBOARD/POINTING DEVICE CONNECTOR PINOUT ........................................................ 5-34
TABLE 520. USB INTERFACE CONFIGURATION REGISTERS ................................................................. 5-37
TABLE 521. USB CONTROL REGISTERS............................................................................................. 5-38
TABLE 522. USB CONNECTOR PINOUT.............................................................................................. 5-38
TABLE 61. GRAPHICS SUBSYSTEM COMPARISON .................................................................................. 6-1
TABLE 62. S3 TRIO64V2/GX-BASED SUBSYSTEM EXTENDED VGA MODES ......................................... 6-3
TABLE 63. GD5436 PCI CONFIGURATION SPACE REGISTERS ............................................................... 6-4
TABLE 64. STANDARD VGA MODE I/O MAPPING................................................................................ 6-4
TABLE 65. S3-SPECIFIC CONTROL REGISTER MAPPING......................................................................... 6-5
TABLE 66. MONITOR POWER MANAGEMENT CONDITIONS.................................................................... 6-5
TABLE 67. DB-15 MONITOR CONNECTOR PINOUT ............................................................................... 6-6
TABLE 71. POWER SUPPLY SPECIFICATIONS......................................................................................... 7-2
TABLE 81. PNP CLIENT MANAGEMENT FUNCTIONS (INT15)................................................................ 8-5
TABLE 81. PNP BIOS FUNCTIONS..................................................................................................... 8-17
TABLE 82. APM BIOS FUNCTIONS (INT15) ..................................................................................... 8-19
TABLE A1. POWER-ON MESSAGES ..................................................................................................... A-1
TABLE A2. BEEP CODE MESSAGES ..................................................................................................... A-1
TABLE A3. POWER-ON SELF TEST (POST) MESSAGES........................................................................ A-2
TABLE A4. PROCESSOR ERROR MESSAGES ......................................................................................... A-3
TABLE A5. MEMORY ERROR MESSAGES............................................................................................. A-4
TABLE A6. KEYBOARD ERROR MESSAGES.......................................................................................... A-4
TABLE A7. PRINTER ERROR MESSAGES.............................................................................................. A-5
TABLE A8. VIDEO (GRAPHICS) ERROR MESSAGES .............................................................................. A-5
TABLE A9. DISKETTE DRIVE ERROR MESSAGES.................................................................................. A-6
TABLE A10. SERIAL INTERFACE ERROR MESSAGES............................................................................. A-6
TABLE A11. SERIAL INTERFACE ERROR MESSAGES............................................................................. A-7
TABLE A12. HARD DRIVE ERROR MESSAGES...................................................................................... A-8
TABLE A13. HARD DRIVE ERROR MESSAGES...................................................................................... A-9
TABLE A14. HARD DRIVE MESSAGES ................................................................................................. A-9
TABLE A15. AUDIO ERROR MESSAGES............................................................................................. A-10
TABLE A16. NETWORK INTERFACE ERROR MESSAGES ...................................................................... A-10
TABLE A17. SCSI INTERFACE ERROR MESSAGES ............................................................................. A-11
TABLE A18. POINTING DEVICE INTERFACE ERROR MESSAGES........................................................... A-11
TABLE A19. CEMM PRIVILEGED OPS ERROR MESSAGES.................................................................. A-12
TABLE A20. CEMM EXCEPTION ERROR MESSAGES ......................................................................... A-12
TABLE B1. ASCII CHARACTER SET .................................................................................................... B-1
TABLE C1. KEYBOARD-TO-SYSTEM COMMANDS ...............................................................................C-10
TABLE C2. KEYBOARD SCAN CODES.................................................................................................C-11
TABLE C3. SCANNER PERFORMANCE CHART .....................................................................................C-17
TABLE C4. SCANNER I/F SIGNALS.....................................................................................................C-18
TABLE C5. SCANNER SPECIFICATIONS ...............................................................................................C-20
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Chapter 1
INTRODUCTION
1. Chapter 1 INTRODUCTION
1.1 ABOUT THIS GUIDE
This guide provides technical information about the Compaq Deskpro 4000N and 4000S
Personal Computers. This document includes information regarding system design, function, and
features that can be used by programmers, engineers, technicians, and system administrators.
1.1.1 USING THIS GUIDE
This guide consists of chapters and appendices. The chapters primarily describe the hardware
and firmware elements contained within the chassis and specifically deal with the system board
and the power supply assembly. The appendices contain general information about standard
peripheral devices such as the keyboard as well as separate audio or other interface cards, as well
as other general information in tabular format.
1.1.2 ADDITIONAL INFORMATION SOURCES
This guide does not describe in detail other manufacturer's components used in the product
covered. For more information on individual commercial-off-the-shelf (COTS) components refer
to the indicated manufacturers' documentation. The products covered by this guide use
architecture based on industry-standard specifications that can be referenced for detailed
information.
Hardcopy documentation sources:
The Lotus/Intel/Microsoft Expanded Memory Specification, Ver. 4.0
PCI Local Bus Specification Revision 2.1
Extended Industry Standard Architecture Expansion Bus Technical Reference Guide,
p/n 130584, Second Edition, Compaq Computer Corporation
Compaq Basic Input/Out System (BIOS) Technical Reference Guide
Doc.# 074A/0693, Fourth Edition, Compaq Computer Corporation
Online information sources:
Compaq Computer Corporation: http://www.compaq.com
Intel Corporation: http://www.intel.com
VIA Technologies Incorporated: http://www.via.com
National Semiconductor: http://www.national.com
S3 Incorporated: http://www.S3.com
Compaq Deskpro 4000N and 4000S Personal Computers 1-1
First Edition - September 1997
Chapter 1 Introduction
1.2 NOTATIONAL CONVENTIONS
1.2.1 VALUES
Hexadecimal values are indicated by the letter "h" following an alpha-numerical value. Binary
values are indicated by the letter "b" following a value of ones and zeros. Memory addresses
expressed as "SSSS:OOOO" (SSSS = 16-bit segment, OOOO = 16-bit offset) can be assumed as
a hexadecimal value. Values that have no succeeding letter can be assumed to be decimal.
1.2.2 RANGES
Ranges or limits for a parameter are shown as a pair of values separated by two dots:
Example: Bits <7..4> = bits 7, 6, 5, and 4.
1.2.3 SIGNAL LABELS
Signal names are indicated using abbreviations, acronyms, or, if possible, the full signal name in
all capital letters. Signals that are meant to be active low are indicated with a dash immediately
following the name.
1.2.4 REGISTER NOTATION AND USAGE
This guide uses standard Intel naming conventions in discussing the microprocessor's (CPU)
internal registers. Registers that are accessed through programmable I/O using an indexing
scheme are indicated using the following format:
03C5.17h
Index port
Data port
In the example above, register 03C5.17h is accessed by writing the index port value 17h to the
index address (03C4h), followed by a write to or a read from port 03C5h.
1.2.5 BIT NOTATION
Bit values are labeled with bit <0> representing the least-significant bit (LSb) and bit <7>
representing the most-significant bit (MSb) of a byte. Bytes, words, double words, and quad
words are typically shown with most-significant portions on the left or top and the least-
significant portions on the right or bottom respectively.
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Technical Reference Guide
1.3 COMMON ACRONYMS AND ABBREVIATIONS
Table 1-1 lists the acronyms and abbreviations used in this guide.
Table 11. Acronyms and Abbreviations
Table 1-1.
Acronyms and Abbreviations
Acronym/Abbreviation Description
A ampere
AC alternating current
ACPI Advanced Configuration and Power Interface
A/D analog-to-digital
AGP advanced graphics port
API application programming interface
APM advanced power management
ASIC application-specific integrated circuit
AT 1. attention (commands) 2. 286-based PC architecture
ATA AT attachment (mode)
AVI audio-video interleaved
AVGA Advanced VGA
BCD binary-coded decimal
BIOS basic input/output system
bis second/new revision
BitBLT bit block transfer
BNC Bayonet Neill-Concelman (connector)
bps or b/s bits per second
BSP Bootstrap processor
CAS column address strobe
CD compact disk
C D -R O M compact disk read-only memory
CDS compct disk system
CF carry flag
CG A color graphics adapter
Ch channel
CLUT color look-up table (pallete)
cm centimeter
CMC cache/memory controller
CMOS complimentary metal-oxide semiconductor (configuration memory)
Cntlr controller
codec compressor/decompressor
C PQ Compaq
CPU central processing unit
CRT cathode ray tube
C SM Compaq system management / Compaq server management
DAA direct access arrangement
DAC digital-to-analog converter
db decibel
DC direct current
DCH DOS compatibility hole
DDC Display Data Channel
DF direction flag
Continued
Compaq Deskpro 4000N and 4000S Personal Computers 1-3
First Edition - September 1997
Chapter 1 Introduction
Table 1-1. Acronyms and Abbreviations Continued
Acronym/Abbreviation Description
DIMM dual inline memory module
DIN Deutche IndustriNorm (connector standard)
DIP dual inline package
DMA direct memory access
dpi dots per inch
D R AM dynamic random access memory
DRQ data request
EDID extended display identification data
EDO extended data out (RAM type)
EEPROM electrically eraseable PROM
EGA enhanced graphics adapter
EIA Electronic Industry Association
EISA extended ISA
EPP enhanced parallel port
EIDE enhanced IDE
ESCD Extended System Configuration Data (format)
EV Environmental Variable (data)
ExCA Exchangeable Card Architecture
FIFO first in / first out
FL flag (register)
FM frequency modulation
FPM fast page mode (RAM type)
FPU Floating point unit (numeric or math coprocessor)
ft foot
GB gigabyte
G ND ground
GPIO general purpose I/O
GPOC general purpose open-collector
G UI graphics user interface
h hexadecimal
HW hardware
hex hexadecimal
Hz hertz
IDE integrated drive element
IEEE Institute of Electrical and Electronic Engineers
IF interrupt flag
I/F interface
in inch
INT interrupt
I/O input/output
IPL initial program loader
IrDA InfraRed Data Association
IRQ interrupt request
ISA industry standard architecture
JEDEC Joint Electron Device Engineering Council
Kb / KB kilobits / kilobytes (x 1024 bits / x 1024 bytes)
Kb/s kilobits per second
kg kilogram
KHz kilohertz
kv kilovolt
Continued
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Technical Reference Guide
Table 1-1. Acronyms and Abbreviations Continued
Acronym/Abbreviation Description
lb pound
LCD liquid crystal display
LED light-emitting diode
LIF low insertion force (socket)
LSI large scale integration
LSb / LSB least significant bit / least significant byte
LUN logical unit (SCSI)
MMX multimedia extensions
MPEG Motion Picture Experts Group
MOSFET Metal oxide silicon field effect transistor
ms millisecond
MSb / MSB most significant bit / most significant byte
mux multiplex
MVA motion video acceleration
MVW motion video window
n variable parameter/value
NIC network interface card/controller
NiCad nickel cadmium
NiMH nickel-metal hydride
NMI non-maskable interrupt
ns nanosecond
NT nested task flag
NTSC National Television Standards Committee
NVRAM non-volatile random access memory
OEM original equipment manufacturer
OS operating system
PAL 1. programmable array logic 2. phase altering line
PC personal computer
PCI peripheral component interconnect
PCM pulse code modulation
PCMCIA Personal Computer Memory Card International Association
PF parity flag
PIN personal identification number
POST power-on self test
PR O M programmable read-only memory
PTR pointer
R AM random access memory
RAS row address strobe
rcvr receiver
RF resume flag
RG B red/green/blue
RH Relative humidity
RMS root mean square
RO M read-only memory
RPM revolutions per minute
RTC real time clock
R/W read/write
Continued
Compaq Deskpro 4000N and 4000S Personal Computers 1-5
First Edition - September 1997
Chapter 1 Introduction
Table 1-1. Acronyms and Abbreviations Continued
Acronym/Abbreviation Description
SC SI small computer system interface
SDRAM Synchronous Dynamic RAM
SEC Single Edge-Connector
SECAM sequential colour avec memoire (sequential color with memory)
SF sign flag
SGRAM Synchronous Graphics RAM
SIMM single in-line memory module
SIT system information table
SMI system management interrupt
SMM system management mode
SMRAM system management RAM
SPD serial presence detect
SPP standard parallel port
SRAM static RAM
STN super twist pneumatic
SVGA super VGA
SW software
TAD telephone answering device
TAM telephone answering machine
TCP tape carrier package
TF trap flag
TFT thin-film transistor
TIA Telecommunications Information Administration
TPE twisted pair ethernet
TPI track per inch
TTl transistor-transistor logic
TV television
TX transmit
UART universal asynchronous receiver/transmitter
us / s microsecond
USB Universal Serial Bus
UTP unshielded twisted pair
V volt
VESA Video Electronic Standards Association
VGA video graphics adapter
vib vibrato
VLSI very large scale integration
VRAM Video RAM
W watt
WRAM Windows RAM
ZF zero flag
ZIF zero insertion force (socket)
1-6 Compaq Deskpro 4000N and 4000S Personal Computers
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Technical Reference Guide
Chapter 2
SYSTEM OVERVIEW
2. Chapter 2 SYSTEM OVERVIEW
2.1 INTRODUCTION
The Compaq Deskpro 4000N and 4000S Personal Computers are based on Pentium
microprocessors featuring MMX technology and designed with an emphasis on speed, storage
capacity, and multimedia compatibility to meet the requirements of the business environment.
These models feature architectures incorporating the PCI and ISA buses. All models are easily
upgradeable and expandable to keep pace with the needs of the office or home.
Figure 21. Compaq Deskpro 4000S Personal Computer with Monitor
Compaq Deskpro 4000N and 4000S Personal Computers 2-1
First Edition -September
Chapter 2 System Overview
2.2 FEATURES
This section describes the standard and distinguishing features.
2.2.1 STANDARD FEATURES
The following standard features are included on all models:
Pentium microprocessor with MMX technology
256-KB second-level cache
16 or 32 megabytes of SDRAM, with support for ECC and SDP memory
Integrated S3 Trio64V2/GX graphics controller with 2-MB frame
Enhanced IDE controller supporting Ultra ATA (UDMA) modes 0-2
Hard drive fault prediction
PCI connector
Two serial interfaces
Parallel interface
Two universal serial bus ports
Integrated network interface controller (RJ-45/AUI ports)
Compaq Space Saver keyboard w/Windows support
Compaq PS/2-type mouse
APM 1.2 power management support
Plug 'n Play compatible (with ESCD support)
Energy Star compliant
76-watt, surge-tolerant power supply
The Deskpro 4000N and 4000S support the Intelligent Manageability features listed below:
Configuration Asset Fault Security
Management Management Management Management
Remote ROM Flash RAM Type Data ECC RAM Fault Prediction Memory Change Alert
Remote Security DMI BIOS SMART II Hard Drive Ownership Tag
Remote Wakeup Asset Tag Monitor Fault Diag. Config. Cntrl. Hardware
Remote Shutdown Sys. Serial # UDMA Integrity Log. Setup Password
Replicated Setup Sys. Manuf./Model Proactive Backup Power-On Password
ACPI-Ready Sys. Board Rev. Level Thermal Sensor QuickLock/QuickBlank
Dual-State Power Sw. ROM rev. Diskette Boot Cntrl.
Failsafe Boot Block ROM Hard Drive Type Data Diskette Write Cntrl.
Monitor Type Data I/O Port En/Dis. Cntrl.
Compaq Insight Edition Cable Lock Provision
The Intelligent Manageability features provide support for DMI 2.0, Compaq Insight Manager,
and Management Solutions Partners.
2-2 Compaq Deskpro 4000N and 4000S Personal Computers
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Technical Reference Guide
2.2.2 MODEL DIFFERENCES
Deskpro 4000N Deskpro 4000S
PCI connector: 1 1 (shared slot)
ISA connector: none 1 (shared slot)
OS installed: Windows NT 4.0 Windows 95
Remote boot support: Yes No
Diskette drive installed: No Yes
Hard drive size: 1.6 or 2.1 GB 2.1 GB
CD-ROM support: No Yes
2.2.3 OPTIONS
Options that are specific to the Compaq Deskpro 4000N and 4000S Series Personal Computers
include:
System Memory: 8-MB DIMM
16-MB DIMM
32-MB DIMM
64-MB DIMM
128-MB DIMM
Compaq Deskpro Computers are easily upgraded and enhanced with peripheral devices designed
to meet PCI and ISA standards. The Compaq Deskpro Personal Computers are compatible with
peripherals design for Plug 'n Play operation.
Compaq Deskpro 4000N and 4000S Personal Computers 2-3
First Edition -September
Chapter 2 System Overview
2.3 MECHANICAL DESIGN
This section illustrates the layout used by the formfactor. In addition, this section includes the
layout of the system board.
2.3.1 CABINET LAYOUT
4 5 6 1
2
3
Item Function
1 Power Switch
2 Power-On Light
3 Hard Drive Activity Light
4 1.44 MB Diskette Drive (3.5" Drive) [1]
5 1/3 Height Drive Bay (3.5" or 5.25" Drive) [2]
6 1/3 Height Drive Bay (3.5" or 5.25" Drive)
NO TES:
[1] Deskpro 4000S only
[2] Front panel access on 4000S only.
Figure 22. Cabinet Layout, Front View
2-4 Compaq Deskpro 4000N and 4000S Personal Computers
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Technical Reference Guide
2 4 6 10 12
8
1 3 5 9 11
7
Item Function
1 AC Line In Connector
2 Line Voltage Select Switch
3 Universal Serial Bus Interface port 1
4 Universal Serial Bus Interface port 2
5 Parallel Interface Connector
6 Serial Interface Connector B
7 Serial Interface Connector A
8 Network Interface AUI Connector
9 Network Interface RJ-45 Connector
10 Mouse Connector
11 Keyboard Connector
12 Monitor Interface
Figure 23. Cabinet Layout, Rear View
Compaq Deskpro 4000N and 4000S Personal Computers 2-5
First Edition -September
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