Covering Models Featuring
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And
Intel 810E and 815 Chipsets
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Deskpro EX Series Personal Computers
TRG
Featuring Intel Celeron and Pentium III Processors
and Intel 810e and 815 Chipsets
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Technical Reference Guide
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Technical Reference Guide
for
Compaq Deskpro EX/EXS Series Personal Computers
First Edition - August 2000
Second Edition October 2000
Document Number 137H-0800B-WWEN
Compaq Deskpro EX Series of Personal Computers i
Second Edition - October 2000
Technical Reference Guide
Compaq Deskpro EX Series of Personal Computers
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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 MODEL NUMBERING CONVENTION................................................................................... 1-1
1.3 NOTATIONAL CONVENTIONS .............................................................................................. 1-2
1.3.1 VALUES ............................................................................................................................. 1-2
1.3.2 RANGES ............................................................................................................................. 1-2
1.3.3 SIGNAL LABELS............................................................................................................... 1-2
1.3.4 REGISTER NOTATION AND USAGE............................................................................. 1-2
1.3.5 BIT NOTATION ................................................................................................................. 1-2
1.4 COMMON ACRONYMS AND ABBREVIATIONS ................................................................. 1-3
CHAPTER 2 SYSTEM OVERVIEW..........................................................................................................
2.1 INTRODUCTION ....................................................................................................................... 2-1
2.2 FEATURES AND OPTIONS...................................................................................................... 2-2
2.2.1 STANDARD FEATURES................................................................................................... 2-2
2.2.2 OPTIONS ............................................................................................................................ 2-3
2.3 MECHANICAL DESIGN ........................................................................................................... 2-4
2.3.1 CABINET LAYOUTS ........................................................................................................ 2-5
2.3.2 CHASSIS LAYOUTS ......................................................................................................... 2-7
2.3.3 BOARD LAYOUT ............................................................................................................ 2-10
2.4 SYSTEM ARCHITECTURE .................................................................................................... 2-11
2.4.1 PROCESSORS .................................................................................................................. 2-14
2.4.2 CHIPSET ........................................................................................................................... 2-16
2.4.3 SUPPORT COMPONENTS.............................................................................................. 2-16
2.4.4 SYSTEM MEMORY......................................................................................................... 2-17
2.4.5 MASS STORAGE ............................................................................................................. 2-17
2.4.6 SERIAL, PARALLEL, GAME INTERFACES................................................................. 2-17
2.4.7 UNIVERSAL SERIAL BUS INTERFACE ...................................................................... 2-17
2.4.8 GRAPHICS SUBSYSTEM ............................................................................................... 2-18
2.4.9 AUDIO SUBSYSTEM...................................................................................................... 2-19
2.5 SPECIFICATIONS ................................................................................................................... 2-19
CHAPTER 3 PROCESSOR/MEMORY SUBSYSTEM ............................................................................
3.1 INTRODUCTION ....................................................................................................................... 3-1
3.2 PROCESSOR .............................................................................................................................. 3-2
3.2.1 CELERON PROCESSOR ................................................................................................... 3-2
3.2.2 PENTIUM III PROCESSOR............................................................................................... 3-3
3.2.3 PROCESSOR UPGRADING .............................................................................................. 3-4
3.3 MEMORY SUBSYSTEM........................................................................................................... 3-5
3.4 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 BUS TRANSACTIONS ............................................................................................... 4-3
4.2.2 PCI BUS MASTER ARBITRATION ................................................................................. 4-6
4.2.3 OPTION ROM MAPPING.................................................................................................. 4-7
4.2.4 PCI INTERRUPTS.............................................................................................................. 4-7
4.2.5 PCI POWER MANAGEMENT SUPPORT........................................................................ 4-7
4.2.6 PCI SUB-BUSSES .............................................................................................................. 4-7
4.2.7 PCI CONFIGURATION ..................................................................................................... 4-8
4.2.8 PCI CONNECTOR.............................................................................................................. 4-9
4.3 AGP BUS OVERVIEW ............................................................................................................ 4-10
4.3.1 BUS TRANSACTIONS .................................................................................................... 4-10
4.3.2 AGP CONFIGURATION.................................................................................................. 4-13
4.3.3 AGP CONNECTOR.......................................................................................................... 4-14
4.4 SYSTEM RESOURCES ........................................................................................................... 4-15
4.4.1 INTERRUPTS ................................................................................................................... 4-15
4.4.2 DIRECT MEMORY ACCESS .......................................................................................... 4-19
4.5 SYSTEM CLOCK DISTRIBUTION ........................................................................................ 4-22
4.6 REAL-TIME CLOCK AND CONFIGURATION MEMORY ................................................. 4-22
4.6.1 CLEARING CMOS........................................................................................................... 4-23
4.6.2 CMOS ARCHIVE AND RESTORE (DESKTOP AND MINITOWER ONLY) .............. 4-24
4.6.3 STANDARD CMOS LOCATIONS .................................................................................. 4-24
4.7 SYSTEM MANAGEMENT...................................................................................................... 4-33
4.7.1 SECURITY FUNCTIONS ................................................................................................ 4-33
4.7.2 POWER MANAGEMENT................................................................................................ 4-35
4.7.3 SYSTEM STATUS ........................................................................................................... 4-35
4.7.4 TEMPERATURE SENSING ............................................................................................ 4-36
4.8 SYSTEM COOLING................................................................................................................. 4-37
4.9 REGISTER MAP AND MISCELLANEOUS FUNCTIONS.................................................... 4-38
4.9.1 SYSTEM I/O MAP ........................................................................................................... 4-38
4.9.2 82801 ICH GENERAL PURPOSE FUNCTIONS ............................................................ 4-39
4.9.3 I/O CONTROLLER FUNCTIONS .................................................................................. 4-40
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 CONNECTOR ............................................................................................................. 5-3
5.3 DISKETTE DRIVE INTERFACE .............................................................................................. 5-4
5.3.1 DISKETTE DRIVE PROGRAMMING.............................................................................. 5-5
5.3.2 DISKETTE DRIVE CONNECTOR.................................................................................... 5-7
5.4 SERIAL/GAME INTERFACES.................................................................................................. 5-8
5.4.1 SERIAL INTERFACE ........................................................................................................ 5-8
5.4.2 SERIAL INTERFACE PROGRAMMING ......................................................................... 5-9
5.4.3 GAME/MIDI INTERFACE .............................................................................................. 5-10
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5.5 PARALLEL INTERFACE ........................................................................................................ 5-11
5.5.1 STANDARD PARALLEL PORT MODE......................................................................... 5-11
5.5.2 ENHANCED PARALLEL PORT MODE ........................................................................ 5-12
5.5.3 EXTENDED CAPABILITIES PORT MODE .................................................................. 5-12
5.5.4 PARALLEL INTERFACE PROGRAMMING ................................................................. 5-12
5.5.5 PARALLEL INTERFACE CONNECTOR ....................................................................... 5-14
5.6 KEYBOARD/POINTING DEVICE INTERFACE................................................................... 5-15
5.6.1 KEYBOARD INTERFACE OPERATION....................................................................... 5-15
5.6.2 POINTING DEVICE INTERFACE OPERATION .......................................................... 5-17
5.6.3 KEYBOARD/POINTING DEVICE INTERFACE PROGRAMMING........................... 5-17
5.6.4 KEYBOARD/POINTING DEVICE INTERFACE CONNECTOR.................................. 5-20
5.7 UNIVERSAL SERIAL BUS INTERFACE .............................................................................. 5-21
5.7.1 USB DATA FORMATS.................................................................................................... 5-21
5.7.2 USB PROGRAMMING .................................................................................................... 5-23
5.7.3 USB CONNECTOR .......................................................................................................... 5-24
5.7.4 USB CABLE DATA ......................................................................................................... 5-24
5.8 AUDIO SUBSYSTEM.............................................................................................................. 5-25
5.8.1 FUNCTIONAL ANALYSIS ............................................................................................. 5-25
5.8.2 AC97 AUDIO CONTROLLER......................................................................................... 5-27
5.8.3 AC97 LINK BUS .............................................................................................................. 5-27
5.8.4 AUDIO CODEC................................................................................................................ 5-28
5.8.5 AUDIO PROGRAMMING ............................................................................................... 5-29
5.8.6 AUDIO SPECIFICATIONS.............................................................................................. 5-30
5.8.7 AUDIO/MODEM RISER INTERFACE ........................................................................... 5-31
5.9 NETWORK SUPPORT............................................................................................................. 5-32
5.9.1 PCI VER. 2.2 SUPPORT .................................................................................................. 5-32
5.9.2 ALERT-ON-LAN SUPPORT ........................................................................................... 5-32
5.9.3 REMOTE SYSTEM ALERT SUPPORT.......................................................................... 5-34
5.9.4 WAKE ON LAN SUPPORT ............................................................................................. 5-35
CHAPTER 6 GMCH-BASED GRAPHICS SUBSYSTEM .......................................................................
6.1 INTRODUCTION ....................................................................................................................... 6-1
6.1.1 FEATURE SUMMARY...................................................................................................... 6-1
6.2 GMCH-BASED GRAPHICS FUNCTIONAL DESCRIPTION ................................................. 6-2
6.2.1 DISPLAY MODES ............................................................................................................. 6-4
6.3 GMCH-BASED GRAPHICS PROGRAMMING ....................................................................... 6-5
6.4 MONITOR POWER MANAGEMENT CONTROL .................................................................. 6-5
6.5 MONITOR CONNECTOR ......................................................................................................... 6-6
6.6 UPGRADING GMCH-BASED GRAPHICS .............................................................................. 6-6
6.6.1 UPGRADING DESKTOP OR MINITOWER GRAPHICS................................................ 6-6
6.6.2 UPGRADING MICROTOWER GRAPHICS ..................................................................... 6-6
CHAPTER 7 POWER SUPPLY AND DISTRIBUTION ..........................................................................
7.1 INTRODUCTION ....................................................................................................................... 7-1
7.1 POWER SUPPLY ASSEMBLY/CONTROL ............................................................................. 7-1
7.1.1 POWER SUPPLY ASSEMBLY ......................................................................................... 7-2
7.1.2 POWER CONTROL ........................................................................................................... 7-3
7.2 POWER DISTRIBUTION .......................................................................................................... 7-5
7.2.1 3.3/5/12 VDC DISTRIBUTION.......................................................................................... 7-5
7.2.2 LOW VOLTAGE DISTRIBUTION ................................................................................... 7-7
7.3 SIGNAL DISTRIBUTION.......................................................................................................... 7-8
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CHAPTER 8 BIOS ROM................................................................................................................................
8.1 INTRODUCTION ....................................................................................................................... 8-1
8.2 ROM FLASHING ....................................................................................................................... 8-2
8.2.1 UPGRADING ...................................................................................................................... 8-2
8.2.2 CHANGEABLE SPLASH SCREEN .................................................................................. 8-3
8.3 BOOT FUNCTIONS................................................................................................................... 8-4
8.3.1 BOOT DEVICE ORDER .................................................................................................... 8-4
8.3.2 NETWORK BOOT (F12) SUPPORT ................................................................................. 8-4
8.3.3 MEMORY DETECTION AND CONFIGURATION......................................................... 8-5
8.3.4 BOOT ERROR CODES ...................................................................................................... 8-5
8.4 SETUP UTILITES ...................................................................................................................... 8-6
8.4.1 DESKTOP/MINITOWER SETUP UTILITY..................................................................... 8-6
8.4.2 MICROTOWER SETUP UTILITY .................................................................................. 8-12
8.5 CLIENT MANAGEMENT FUNCTIONS ................................................................................ 8-16
8.5.1 SYSTEM ID AND ROM TYPE........................................................................................ 8-18
8.5.2 EDID RETRIEVE ............................................................................................................. 8-18
8.5.3 TEMPERATURE STATUS .............................................................................................. 8-19
8.5.4 DRIVE FAULT PREDICTION......................................................................................... 8-19
8.6 PNP SUPPORT ......................................................................................................................... 8-19
8.6.1 SMBIOS ............................................................................................................................ 8-20
8.7 POWER MANAGEMENT FUNCTIONS ................................................................................ 8-21
8.7.1 INDEPENDENT PM SUPPORT ...................................................................................... 8-21
8.7.2 ACPI SUPPORT................................................................................................................ 8-23
8.7.3 APM 1.2 SUPPORT .......................................................................................................... 8-23
8.8 USB LEGACY SUPPORT........................................................................................................ 8-27
APPENDIX A ERROR MESSAGES AND CODES...................................................................................
A.1 INTRODUCTION ...................................................................................................................... A-1
A.2 BEEP/KEYBOARD LED CODES............................................................................................. A-1
A.3 POWER-ON SELF TEST (POST) MESSAGES ....................................................................... A-2
A.4 SYSTEM ERROR MESSAGES (1XX-XX) ................................................................................ A-3
A.5 MEMORY ERROR MESSAGES (2XX-XX) .............................................................................. A-4
A.6 KEYBOARD ERROR MESSAGES (30X-XX) .......................................................................... A-4
A.7 PRINTER ERROR MESSAGES (4XX-XX)................................................................................ A-5
A.8 VIDEO (GRAPHICS) ERROR MESSAGES (5XX-XX)............................................................. A-5
A.9 DISKETTE DRIVE ERROR MESSAGES (6XX-XX) ................................................................ A-6
A.10 SERIAL INTERFACE ERROR MESSAGES (11XX-XX).......................................................... A-6
A.11 MODEM COMMUNICATIONS ERROR MESSAGES (12XX-XX) ......................................... A-7
A.12 SYSTEM STATUS ERROR MESSAGES (16XX-XX) .............................................................. A-8
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 DVD/CD-ROM ERROR MESSAGES (33XX-XX)................................................................... A-10
A.18 NETWORK INTERFACE ERROR MESSAGES (60XX-XX) ................................................. A-10
A.19 SCSI INTERFACE ERROR MESSAGES (65XX-XX, 66XX-XX, 67XX-XX) ............................ A-11
A.20 POINTING DEVICE INTERFACE ERROR MESSAGES (8601-XX).................................... A-11
APPENDIX B ASCII CHARACTER SET..................................................................................................
B .1 INTRODUCTION .......................................................................................................................B-1
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APPENDIX C KEYBOARD.........................................................................................................................
C.1 INTRODUCTION .......................................................................................................................C-1
C.2 KEYSTROKE PROCESSING ....................................................................................................C-2
C.2.1 PS/2-TYPE KEYBOARD TRANSMISSIONS...................................................................C-3
C.2.2 USB-TYPE KEYBOARD TRANSMISSIONS...................................................................C-4
C.2.3 KEYBOARD LAYOUTS....................................................................................................C-5
C.2.4 KEYS ...................................................................................................................................C-8
C.2.5 KEYBOARD COMMANDS.............................................................................................C-11
C.2.6 SCAN CODES...................................................................................................................C-11
C.3 CONNECTORS.........................................................................................................................C-16
APPENDIX D COMPAQ/NVIDIA VANTA LT AGP GRAPHICS CARD .............................................
D.1 INTRODUCTION ...................................................................................................................... D-1
D.2 FUNCTIONAL DESCRIPTION................................................................................................ D-2
D.3 DISPLAY MODES .................................................................................................................... D-3
D.4 SOFTWARE SUPPORT INFORMATION ............................................................................... D-4
D.5 POWER MANAGEMENT AND CONSUMPTION ................................................................. D-4
D.6 CONNECTORS.......................................................................................................................... D-5
D.6.1 MONITOR CONNECTOR ................................................................................................ D-5
APPENDIX E COMPAQ/NVIDIA M64 GRAPHICS CARD ...................................................................
E.1 INTRODUCTION ....................................................................................................................... E-1
E.2 FUNCTIONAL DESCRIPTION.................................................................................................E-2
E.3 DISPLAY MODES ..................................................................................................................... E-3
E.4 SOFTWARE SUPPORT INFORMATION ................................................................................ E-4
E.5 MONITOR CONTROL...............................................................................................................E-4
E.6 CONNECTORS........................................................................................................................... E-5
E.6.2 MONITOR CONNECTOR ................................................................................................. E-5
E.6.3 VIDEO INTERFACE CONNECTOR.................................................................................E-6
APPENDIX F AMI BIOS ERROR CODES ...............................................................................................
F.1 INTRODUCTION ....................................................................................................................... F-1
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LIST OF FIGURES
FIGURE 21. COMPAQ DESKPRO EX SERIES PERSONAL COMPUTERS WITH MONITORS.............................. 2-1
FIGURE 22. COMPAQ DESKPRO EX SERIES, FRONT VIEWS ...................................................................... 2-5
FIGURE 23. COMPAQ DESKPRO EX SERIES, REAR VIEWS ........................................................................ 2-6
FIGURE 24. COMPAQ DESKPRO EX DESKTOP CHASSIS LAYOUT, TOP VIEW ............................................ 2-7
FIGURE 25. COMPAQ DESKPRO EX MICROTOWER CHASSIS LAYOUT, SIDE VIEW.................................... 2-8
FIGURE 26. COMPAQ DESKPRO EX MINITOWER CHASSIS LAYOUT, SIDE VIEW ....................................... 2-9
FIGURE 27. SYSTEM BOARD LAYOUT.................................................................................................... 2-10
FIGURE 28. 810E CHIPSET-BASED ARCHITECTURE (MICROTOWER), BLOCK DIAGRAM ........................... 2-12
FIGURE 29. 815 CHIPSET-BASED ARCHITECTURE (DESKTOP OR MINITOWER), BLOCK DIAGRAM ........... 2-13
FIGURE 210. PROCESSOR ASSEMBLY AND MOUNTING........................................................................... 2-14
FIGURE 31. PROCESSOR/MEMORY SUBSYSTEM ARCHITECTURE .............................................................. 3-1
FIGURE 32. CELERON PROCESSOR INTERNAL ARCHITECTURE ................................................................. 3-2
FIGURE 33. PENTIUM III PROCESSOR INTERNAL ARCHITECTURE ............................................................. 3-3
FIGURE 34. SYSTEM MEMORY MAP ......................................................................................................... 3-7
FIGURE 4-1. PCI BUS DEVICES AND FUNCTIONS......................................................................................... 4-2
FIGURE 4-2. CONFIGURATION CYCLE ......................................................................................................... 4-4
FIGURE 4-3. PCI CONFIGURATION SPACE MAPPING................................................................................... 4-5
FIGURE 4-4. PCI BUS CONNECTOR (32-BIT TYPE)..................................................................................... 4-9
FIGURE 4-5. AGP 1X DATA TRANSFER (PEAK TRANSFER RATE: 266 MB/S) .......................................... 4-11
FIGURE 4-6. AGP 2X DATA TRANSFER (PEAK TRANSFER RATE: 532 MB/S) .......................................... 4-12
FIGURE 4-7. AGP 4X DATA TRANSFER (PEAK TRANSFER RATE: 1064 MB/S) ........................................ 4-12
FIGURE 4-8. UNIVERSAL AGP BUS CONNECTOR ..................................................................................... 4-14
FIGURE 4-9. MASKABLE INTERRUPT PROCESSING, BLOCK DIAGRAM ...................................................... 4-15
FIGURE 4-10. CONFIGURATION MEMORY MAP......................................................................................... 4-22
FIGURE 4-11. DESKTOP AND MINITOWER FAN CONTROL BLOCK DIAGRAM.............................................. 4-37
FIGURE 5-1. 40-PIN PRIMARY IDE CONNECTOR (ON SYSTEM BOARD). ...................................................... 5-3
FIGURE 5-2. 34-PIN DISKETTE DRIVE CONNECTOR. ................................................................................... 5-7
FIGURE 5-3. SERIAL INTERFACE CONNECTOR (MALE DB-9 AS VIEWED FROM REAR OF CHASSIS) .............. 5-8
FIGURE 5-4. GAME/MIDI INTERFACE CONNECTOR (FEMALE DB-15 AS VIEWED FROM REAR OF CHASSIS)5-10
FIGURE 5-5. PARALLEL INTERFACE CONNECTOR (FEMALE DB-25 AS VIEWED FROM REAR OF CHASSIS) . 5-14
FIGURE 5-6. 8042-TO-KEYBOARD TRANSMISSION OF CODE EDH, TIMING DIAGRAM.............................. 5-15
FIGURE 5-7. KEYBOARD OR POINTING DEVICE INTERFACE CONNECTOR ................................................. 5-20
FIGURE 5-8. USB I/F, BLOCK DIAGRAM .................................................................................................. 5-21
FIGURE 5-9. USB PACKET FORMATS ....................................................................................................... 5-22
FIGURE 5-10. UNIVERSAL SERIAL BUS CONNECTOR ................................................................................ 5-24
FIGURE 5-11. AUDIO SUBSYSTEM FUNCTIONAL BLOCK DIAGRAM........................................................... 5-26
FIGURE 5-12. AC'97 LINK BUS PROTOCOL.............................................................................................. 5-27
FIGURE 5-13. AUDIO CODEC FUNCTIONAL BLOCK DIAGRAM................................................................... 5-28
FIGURE 5-14. AMR CONNECTOR ............................................................................................................. 5-31
FIGURE 5-15. AOL IMPLEMENTATION (GENERIC REPRESENTATION) ....................................................... 5-33
FIGURE 5-16. REMOTE SENSE ALERT IMPLEMENTATION (GENERIC REPRESENTATION) ........................... 5-34
FIGURE 5-17. RSA LOGIC, BLOCK DIAGRAM........................................................................................... 5-34
FIGURE 5-18. WOL INTERFACE CONNECTION (GENERIC REPRESENTATION) ........................................... 5-35
FIGURE 6-1. GMCH-BASED GRAPHICS, BLOCK DIAGRAM ......................................................................... 6-2
FIGURE 6-2. GMCH INTEGRATED GRAPHICS SUBSYSTEM ........................................................................ 6-3
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FIGURE 71. POWER DISTRIBUTION AND CONTROL, BLOCK DIAGRAM ...................................................... 7-1
FIGURE 72. DESKPRO EX DESKTOP POWER CABLE DIAGRAM ................................................................. 7-5
FIGURE 73. DESKPRO EX MINITOWER POWER CABLE DIAGRAM............................................................. 7-6
FIGURE 74. LOW VOLTAGE SUPPLY AND DISTRIBUTION DIAGRAM .......................................................... 7-7
FIGURE 75. SIGNAL DISTRIBUTION DIAGRAM, DESKTOP/MINITOWER (TYPICAL CONFIGURATION) .......... 7-8
FIGURE 76. SIGNAL DISTRIBUTION DIAGRAM, MICROTOWER (TYPICAL CONFIGURATION) ...................... 7-9
FIGURE 77. SYSTEM BOARD HEADER PINOUTS ...................................................................................... 7-10
FIGURE B1. ASCII CHARACTER SET........................................................................................................B-1
FIGURE C1. KEYSTROKE PROCESSING ELEMENTS, BLOCK DIAGRAM ...................................................... C-2
FIGURE C2. PS/2 KEYBOARD-TO-SYSTEM TRANSMISSION, TIMING DIAGRAM ........................................ C-3
FIGURE C3. U.S. ENGLISH (101-KEY) KEYBOARD KEY POSITIONS..........................................................C-5
FIGURE C4. NATIONAL (102-KEY) KEYBOARD KEY POSITIONS...............................................................C-5
FIGURE C5. U.S. ENGLISH WINDOWS (101W-KEY) KEYBOARD KEY POSITIONS.....................................C-6
FIGURE C6. NATIONAL WINDOWS (102W-KEY) KEYBOARD KEY POSITIONS .......................................... C-6
FIGURE C7. 7-BUTTON EASY ACCESS KEYBOARD LAYOUT.....................................................................C-7
FIGURE C8. 8-BUTTON EASY ACCESS KEYBOARD LAYOUT.....................................................................C-7
FIGURE C9. PS/2 KEYBOARD CABLE CONNECTOR (MALE)....................................................................C-16
FIGURE C10. USB KEYBOARD CABLE CONNECTOR (MALE) ................................................................. C-16
FIGURE D-1. COMPAQ/NVIDIA VANTA LT AGP GRAPHICS CARD (P/N 192174-002) LAYOUT .............D-1
FIGURE D-2. COMPAQ/NVIDIA VANTA LT GRAPHICS CARD BLOCK DIAGRAM..........................................D-2
FIGURE D-3. VGA MONITOR CONNECTOR, (FEMALE DB-15, AS VIEWED FROM REAR). ..............................D-5
FIGURE E1. COMPAQ/NVIDIA M64 AGP GRAPHICS CARD LAYOUT (COMPAQ P/N 179250) ..................... 1
FIGURE E2. COMPAQ/NVIDIA M64 AGP GRAPHICS CARD BLOCK DIAGRAM ............................................ 2
FIGURE E3. VGA MONITOR CONNECTOR, (FEMALE DB-15, AS VIEWED FROM REAR)...................................5
FIGURE E4. VIDEO INTERFACE CONNECTOR (26-PIN HEADER)....................................................................6
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LIST OF TABLES
TABLE 11. ACRONYMS AND ABBREVIATIONS .......................................................................................... 1-3
TABLE 2-1. FEATURE DIFFERENCE MATRIX ............................................................................................... 2-2
TABLE 2-2. CHIPSET COMPARISON........................................................................................................... 2-16
TABLE 2-3. SUPPORT COMPONENT FUNCTIONS........................................................................................ 2-16
TABLE 2-4. GRAPHICS SUBSYSTEM COMPARISON .................................................................................... 2-18
TABLE 2-5. ENVIRONMENTAL SPECIFICATIONS ........................................................................................ 2-19
TABLE 2-6. ELECTRICAL SPECIFICATIONS ................................................................................................ 2-19
TABLE 2-7. PHYSICAL SPECIFICATIONS .................................................................................................... 2-20
TABLE 2-8. DISKETTE DRIVE SPECIFICATIONS ......................................................................................... 2-20
TABLE 2-9. 48X CD-ROM DRIVE SPECIFICATIONS .................................................................................. 2-21
TABLE 2-10. HARD DRIVE SPECIFICATIONS ............................................................................................. 2-21
TABLE 31. CELERON PROCESSOR STATISTICAL COMPARISON.................................................................. 3-2
TABLE 32. PENTIUM III PROCESSOR STATISTICAL COMPARISON ............................................................. 3-3
TABLE 33. SPD ADDRESS MAP (SDRAM DIMM) .................................................................................... 3-6
TABLE 34. HOST/PCI BRIDGE CONFIGURATION REGISTERS (GMCH, FUNCTION 0) ................................. 3-8
TABLE 4-1. PCI DEVICE CONFIGURATION ACCESS .................................................................................... 4-4
TABLE 4-2. SYSTEM BOARD PCI DEVICE IDENTIFICATION......................................................................... 4-5
TABLE 4-3. PCI BUS MASTERING DEVICES................................................................................................ 4-6
TABLE 4-4. LPC BRIDGE CONFIGURATION REGISTERS (ICH, FUNCTION 0) ................................................ 4-8
TABLE 4-5. PCI BUS CONNECTOR PINOUT................................................................................................. 4-9
TABLE 4-6. PCI/AGP BRIDGE CONFIGURATION REGISTERS (MCH, FUNCTION 1) .................................... 4-13
TABLE 4-7. AGP BUS CONNECTOR PINOUT.............................................................................................. 4-14
TABLE 4-8. MASKABLE INTERRUPT PRIORITIES AND ASSIGNMENTS ........................................................ 4-16
TABLE 4-9. MASKABLE INTERRUPT CONTROL REGISTERS ....................................................................... 4-17
TABLE 4-10. DEFAULT DMA CHANNEL ASSIGNMENTS ........................................................................... 4-19
TABLE 4-11. DMA PAGE REGISTER ADDRESSES ..................................................................................... 4-20
TABLE 4-12. DMA CONTROLLER REGISTERS .......................................................................................... 4-21
TABLE 4-13. CLOCK GENERATION AND DISTRIBUTION ............................................................................ 4-22
TABLE 4-14. CONFIGURATION MEMORY (CMOS) MAP........................................................................... 4-24
TABLE 4-15. SYSTEM BOOT/ROM FLASH STATUS LED INDICATIONS...................................................... 4-35
TABLE 4-16. SYSTEM OPERATIONAL STATUS LED INDICATIONS.............................................................. 4-36
TABLE 4-17. SYSTEM I/O MAP ................................................................................................................ 4-38
TABLE 4-18. 82801 ICH GPIO REGISTER UTILIZATION (DESKTOP AND MINITOWER ONLY) .................... 4-39
TABLE 4-19 LPC47B357 CONTROL REGISTERS (DESKTOP AND MINITOWER ONLY)................................. 4-40
TABLE 4-20. LPC47B357 GPIO REGISTER UTILIZATION (DESKTOP AND MINITOWER ONLY) .................. 4-41
TABLE 51. IDE PCI CONFIGURATION REGISTERS .................................................................................... 5-2
TABLE 52. IDE BUS MASTER CONTROL REGISTERS ................................................................................ 5-2
TABLE 53. 40-PIN PRIMARY IDE CONNECTOR PINOUT............................................................................ 5-3
TABLE 54. DISKETTE DRIVE CONTROLLER CONFIGURATION REGISTERS.................................................. 5-5
TABLE 55. DISKETTE DRIVE INTERFACE CONTROL REGISTERS ................................................................ 5-6
TABLE 56. 34-PIN DISKETTE DRIVE CONNECTOR PINOUT........................................................................ 5-7
TABLE 57. DB-9 SERIAL CONNECTOR PINOUT......................................................................................... 5-8
TABLE 58. SERIAL INTERFACE CONFIGURATION REGISTERS .................................................................... 5-9
TABLE 59. SERIAL INTERFACE CONTROL REGISTERS ............................................................................... 5-9
TABLE 510. DB-15 GAME/MIDI CONNECTOR PINOUT.......................................................................... 5-10
TABLE 511. PARALLEL INTERFACE CONFIGURATION REGISTERS ........................................................... 5-13
TABLE 512. PARALLEL INTERFACE CONTROL REGISTERS ...................................................................... 5-13
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TABLE 513. DB-25 PARALLEL CONNECTOR PINOUT.............................................................................. 5-14
TABLE 514. 8042-TO-KEYBOARD COMMANDS...................................................................................... 5-16
TABLE 515. KEYBOARD INTERFACE CONFIGURATION REGISTERS.......................................................... 5-17
TABLE 516. CPU COMMANDS TO THE 8042.......................................................................................... 5-19
TABLE 517. KEYBOARD/POINTING DEVICE CONNECTOR PINOUT .......................................................... 5-20
TABLE 518. USB INTERFACE CONFIGURATION REGISTERS.................................................................... 5-23
TABLE 519. USB CONTROL REGISTERS ................................................................................................. 5-23
TABLE 520. USB CONNECTOR PINOUT.................................................................................................. 5-24
TABLE 521. USB CABLE LENGTH DATA................................................................................................ 5-24
TABLE 522. AC'97 AUDIO CONTROLLER PCI CONFIGURATION REGISTERS........................................... 5-29
TABLE 523. AC'97 AUDIO CODEC CONTROL REGISTERS....................................................................... 5-29
TABLE 524. AUDIO SUBSYSTEM SPECIFICATIONS................................................................................... 5-30
TABLE 525. AMR CONNECTOR PINOUT................................................................................................. 5-31
TABLE 526. AOL EVENTS...................................................................................................................... 5-32
TABLE 527. REMOTE SYSTEM ALERT EVENTS ....................................................................................... 5-35
TABLE 6-1. INTEL GRAPHICS DISPLAY MODES........................................................................................... 6-4
TABLE 6-2. GMCH-BASED GRAPHICS CONTROLLER PCI CONFIGURATION REGISTERS............................. 6-5
TABLE 6-3. MONITOR POWER MANAGEMENT CONDITIONS........................................................................ 6-5
TABLE 6-4. DB-15 MONITOR CONNECTOR PINOUT ................................................................................... 6-6
TABLE 8-1. BOOT BLOCK CODES ................................................................................................................. 8-2
TABLE 8-2. BOOT ERROR CODES ................................................................................................................. 8-5
TABLE 8-3. DESKTOP/MINITOWER SETUP UTILITY FUNCTONS..................................................................... 8-6
TABLE 8-4. CLIENT MANAGEMENT FUNCTIONS (INT15) ......................................................................... 8-16
TABLE 8-5. PNP BIOS FUNCTIONS .......................................................................................................... 8-19
TABLE 8-6. APM BIOS FUNCTIONS .......................................................................................................... 8-24
TABLE A1. BEEP/KEYBOARD LED CODES...............................................................................................A-1
TABLE A2. POWER-ON SELF TEST (POST) MESSAGES............................................................................A-2
TABLE A3. SYSTEM ERROR MESSAGES....................................................................................................A-3
TABLE A4. MEMORY ERROR MESSAGES..................................................................................................A-4
TABLE A5. KEYBOARD ERROR MESSAGES ..............................................................................................A-4
TABLE A6. PRINTER ERROR MESSAGES ...................................................................................................A-5
TABLE A7. VIDEO (GRAPHICS) ERROR MESSAGES ..................................................................................A-5
TABLE A8. DISKETTE DRIVE ERROR MESSAGES ......................................................................................A-6
TABLE A9. SERIAL INTERFACE ERROR MESSAGES...................................................................................A-6
TABLE A10. SERIAL INTERFACE ERROR MESSAGES.................................................................................A-7
TABLE A11. SYSTEM STATUS ERROR MESSAGES.....................................................................................A-8
TABLE A12. HARD DRIVE ERROR MESSAGES ..........................................................................................A-8
TABLE A13. HARD DRIVE ERROR MESSAGES ..........................................................................................A-9
TABLE A14. VIDEO (GRAPHICS) ERROR MESSAGES ................................................................................A-9
TABLE A15. AUDIO ERROR MESSAGES ..................................................................................................A-10
TABLE A16. DVD/CD-ROM DRIVE ERROR MESSAGES ........................................................................A-10
TABLE A17. NETWORK INTERFACE ERROR MESSAGES..........................................................................A-10
TABLE A18. SCSI INTERFACE ERROR MESSAGES..................................................................................A-11
TABLE A19. POINTING DEVICE INTERFACE ERROR MESSAGES ..............................................................A-11
TABLE C1. KEYBOARD-TO-SYSTEM COMMANDS...................................................................................C-11
TABLE C2. KEYBOARD SCAN CODES ..................................................................................................... C-12
TABLE D-1. NVIDIA VANTA LT 2D GRAPHICS DISPLAY MODES...............................................................D-3
TABLE D-2. MONITOR POWER MANAGEMENT CONDITIONS.......................................................................D-4
TABLE D-3. DB-15 MONITOR CONNECTOR PINOUT...................................................................................D-5
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TABLE E1. NVIDIA M64 2D GRAPHICS DISPLAY MODES ........................................................................ E-3
TABLE E2. MONITOR POWER MANAGEMENT CONDITIONS ...................................................................... E-4
TABLE E3. DB-15 MONITOR CONNECTOR PINOUT .................................................................................. E-5
TABLE E4. MULTIMEDIA INTERFACE CONNECTOR PINOUT ...................................................................... E-6
TABLE F1. AMI BIOS ERROR CODES........................................................................................................ F-1
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Chapter 1
INTRODUCTION
Chapter 1 INTRODUCTION
1.
1.1 ABOUT THIS GUIDE
This guide provides technical information about the Compaq Deskpro EX Series of Personal
Computers. This document includes information regarding system design, function, and features
that can be used by programmers, engineers, technicians, and system administrators.
This guide and any applicable addendums are available online at the following location:
http://www.compaq.com/support/techpubs/technical_reference_guides/index.html
1.1.1 USING THIS GUIDE
The chapters of this guide primarily describe the hardware and firmware elements and primarily
deal with the system board and the power supply assembly. The appendices contain general
information about standard peripheral devices such as the keyboard.
1.1.2 ADDITIONAL INFORMATION SOURCES
For more information on chipset components mentioned in this guide refer to the indicated
manufacturers' documentation, which may be available at the following online sources:
Compaq Computer Corporation: http://www.compaq.com
Intel Corporation: http://www.intel.com
Standard Microsystems Corporation: http://www.smsc.com
Winbond Inc.: http://www.winbond.com
1 .2 MODEL NUMBERING CONVENTION
The model numbering convention for Compaq Deskpro EX units is as follows:
EXX/XNNN/NNX/N/NNNxxx
NIC/Modem: blank = none, n = NIC, m = modem
Graphics: blank = integrated, a = AIMM, v = nVIDIA
Removable storage: b = CD/CDRW, c = CD, d = DVD, r = CDRW, z = ZIP
Memory (in MB)
OS type (9 = Dual install Win95/98, 4 = Win NT 4.0, 6 = Dual install Win NT/2000)
Chipset type (c = 815, b = 810e)
Hard drive size (in GB)
Processor speed (in MHz)
Processor type: C = Celeron; P = Pentium
Form factor: D = Desktop, M = Minitower
Deskpro series: EX
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Chapter 1 Introduction
1.3 NOTATIONAL CONVENTIONS
1.3.1 VALUES
Hexadecimal values are indicated by a numerical or alpha-numerical value followed by the letter
"h." Binary values are indicated by a value of ones and zeros followed by the letter "b."
Numerical values that have no succeeding letter can be assumed to be decimal.
1.3.2 RANGES
Ranges or limits for a parameter are shown using the following methods:
Example A: Bits <7..4> = bits 7, 6, 5, and 4.
Example B: IRQ3-7, 9 = IRQ signals 3 through 7, and IRQ signal 9
1.3.3 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 (asserted) low are indicated with a dash
immediately following the name.
1.3.4 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.
1.3.5 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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1 .4 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 Accelerated graphics port
API application programming interface
APIC Advanced Programmable Interrupt Controller
APM advanced power management
AOL Alert-On-LANTM
ASIC application-specific integrated circuit
AT 1) attention (modem commands) 2) 286-based PC architecture
A TA AT attachment (IDE protocol)
A TA P I AT attachment w/packet interface extensions
AVI audio-video interleaved
AVGA Advanced VGA
AW G American Wire Gauge (specification)
BAT Basic assurance test
BCD binary-coded decimal
BIOS basic input/output system
bis second/new revision
BitBLT bit block transfer
BNC Bayonet Neill-Concelman (connector type)
bps or b/s bits per second
BSP Bootstrap processor
B TO Built to order
CAS column address strobe
CD compact disk
CD-ROM compact disk read-only memory
CDS compact disk system
CF carry flag
CGA color graphics adapter
Ch channel
cm centimeter
CMC cache/memory controller
CMOS complimentary metal-oxide semiconductor (configuration memory)
Cntlr controller
Cntrl control
codec compressor/decompressor
CPQ Compaq
CPU central processing unit
CRT cathode ray tube
CSM Compaq system management / Compaq server management
DAC digital-to-analog converter
DC direct current
DCH DOS compatibility hole
DDC Display Data Channel
DF direction flag
Continued
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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
DMI Desktop management interface
dpi dots per inch
DRAM 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
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