Compaq W4000 Manual de usuario Pagina 179
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Appendix C Keyboard
C.2.2 USB-TYPE KEYBOARD TRANSMISSIONS
The USB-type keyboard sends essentially the same information to the system that the PS/2
keyboard does except that the data receives additional NRZI encoding and formatting (prior to
leaving the keyboard) to comply with the USB I/F specification (discussed in chapter 5 of this
guide).
Packets received at the system’s USB I/F and decoded as originating from the keyboard result in
an SMI being generated. An SMI handler routine is invoked that decodes the data and transfers
the information to the 8042 keyboard controller where normal (legacy) keyboard processing takes
place.
Compaq Personal Computers
Changed - July 2000
C-4
- Technical Reference Guide 1
- 3
- TABLE OF CONTENTS 7
- LIST OF FIGURES 13
- LIST OF TABLES 15
- Chapter 1 19
- INTRODUCTION 19
- 1.4 SERIAL NUMBER 20
- 1.5 NOTATIONAL CONVENTIONS 21
- 1.5.1 VALUES 21
- 1.5.2 RANGES 21
- Chapter 2 27
- SYSTEM OVERVIEW 27
- 2.2 FEATURES AND OPTIONS 28
- 2.2.1 STANDARD FEATURES 28
- 2.2.2 OPTIONS 29
- 2.3 MECHANICAL DESIGN 30
- 2.3.1 CABINET LAYOUTS 31
- 2.3.1.1 Front Views 31
- 2.3.1.2 Rear Views 32
- 2.3.2 CHASSIS LAYOUTS 33
- 2.3.3 BOARD LAYOUTS 36
- 2.4 SYSTEM ARCHITECTURE 38
- 2.4.2 CHIPSET 41
- 2.4.3 SUPPORT COMPONENTS 41
- 2.4.9 GRAPHICS SUBSYSTEM 43
- 2.4.10 AUDIO SUBSYSTEM 44
- 2.5 SPECIFICATIONS 44
- Chapter 3 47
- PROCESSOR/ 47
- MEMORY SUBSYSTEM 47
- 3.2 PENTIUM 4 PROCESSOR 48
- 3.2.1 PROCESSOR OVERVIEW 48
- 3.2.2 PROCESSOR UPGRADING 50
- 3.3 MEMORY SUBSYSTEM 51
- Chapter 4 55
- SYSTEM SUPPORT 55
- 4.2 PCI BUS OVERVIEW 56
- 4.2.2 PCI BUS MASTER ARBIT 61
- Second Edition – January 2003 62
- 4.2.7 PCI CONFIGURATION 63
- 4.2.8 PCI CONNECTOR 64
- 4.3 AGP BUS OVERVIEW 65
- BUS TRANSACTIONS 65
- Data Request 66
- 4.3.1.2 Data Transfers 66
- AGP 2X Transfers 67
- A 4X Tra 67
- GP nsfers 67
- 4.3.2 AGP CONFIGURATION 68
- .3.3 AGP CONNECTOR 69
- 8259 Mode 71
- APIC Mode 71
- MI- Generation 72
- Non-Maskable Interrupts 72
- SMI- Generation 73
- 4.4.2 IRECT MEMORY ACCESS 74
- DMA Page Registers 75
- 4.4.2.2 trolle gi 76
- DMA Con r Re sters 76
- CLE NG CMOS 78
- STANDARD CMOS LOCATIONS 79
- .7.1.5 Chassis Security 81
- 4.7.2 POWER MANAGEMENT 82
- SYSTEM STATUS 82
- RM EN AND COOLING 83
- 4.7.4 HE 83
- T AL S SING 83
- SYSTEM I/O MAP 85
- Chapter 5 88
- INPUT/OUTPUT INTERFACES 88
- 5.2.2 IDE CONNECTOR 90
- 5.4 SERIAL INTERFACE 95
- 5.4.1 SERIAL CONNECTOR 95
- 5.5 PARALLEL INTERFACE 98
- 5.6.3.1 8042 Configuration 105
- 5.6.3.2 8042 Control 106
- 5.7.1 USB DATA FORMATS 109
- 5.7.2 USB PROGRAMMING 111
- 5.7.2.1 USB Configuration 111
- 5.7.2.2 USB Control 111
- 5.7.3 USB CONNECTOR 112
- 5.7.4 USB CABLE DATA 112
- 5.8 AUDIO SUBSYSTEM 113
- 5.8.1 FUNCTIONAL ANALYSIS 113
- 5.8.2 AC97 AUDIO CONTROLLER 115
- 5.8.3 AC97 LINK BUS 115
- 5.8.4 AUDIO CODEC 116
- 5.8.5 AUDIO PROGRAMMING 117
- 5.8.5.1 Audio Configuration 117
- 5.8.5.2 Audio Control 117
- 5.8.6 AUDIO SPECIFICATIONS 118
- 5.9.1 WAKE ON LAN SUPPORT 120
- 5.9.2 ALERT ON LAN SUPPORT 120
- 5.9.3.1 APM Environment 121
- 5.9.3.2 ACPI Environment 121
- 5.9.4 NIC PROGRAMMING 122
- 5.9.4.1 Configuration 122
- 5.9.4.2 Control 122
- 5.9.5 NIC CONNECTOR 123
- 5.9.6 NIC SPECIFICATIONS 123
- 5.9.7 NIC UPGRADING/CHANGING 124
- Chapter 6 126
- POWER and SIGNAL 126
- DISTRIBUTION 126
- 6.2.1 POWER SUPPLY ASSEMBLY 127
- 6.2.2 POWER CONTROL 128
- 6.2.2.1 Power Button 128
- 6.2.2.3 Wake Up Events 129
- 6.2.3 POWER MANAGEMENT 130
- 6.3 POWER DISTRIBUTION 131
- 6.4 SIGNAL DISTRIBUTION 134
- Second Edition- January 2003 137
- Chapter 7 138
- BIOS ROM 138
- 7.2 ROM FLASHING 139
- 7.2.1 UPGRADING 139
- Second Edition - January 2003 140
- 7.3 BOOT FUNCTIONS 141
- 7.3.1 BOOT DEVICE ORDER 141
- 7.3.4 BOOT ERROR CODES 142
- 7.4 SETUP UTILITY 143
- 7.5.2 EDID RETRIEVE 151
- 7.5.3 TEMPERATURE STATUS 152
- 7.5.4 DRIVE FAULT PREDICTION 152
- 7.6 PNP SUPPORT 152
- 7.6.1 SMBIOS 153
- 7.7.2 ACPI SUPPORT 156
- 7.7.3 APM 1.2 SUPPORT 156
- System Timer 158
- IDE Hard Drive Timer 158
- System/Hard Drive Standby 159
- System Suspend 159
- System OFF 160
- 7.7.3.3 Waking Up in APM 160
- 7.8 USB LEGACY SUPPORT 160
- Appendix A 162
- ERROR MESSAGES AND CODES 162
- Changed - November 2000 173
- Appendix B 174
- ASCII CHARACTER SET 174
- Appendix C 176
- KEYBOARD 176
- C.2 KEYSTROKE PROCESSING 177
- Changed - July 2000 179
- C.2.3 KEYBOARD LAYOUTS 180
- C.2.4 KEYS 183
- C.2.4.3 Windows Keystrokes 184
- C.2.5 KEYBOARD COMMANDS 186
- C.2.6 SCAN CODES 186
- Continued 189
- C.3 CONNECTORS 191
- Appendix D 192
- COMPAQ/NVIDIA VANTA LT 192
- AGP GRAPHICS CARD 192
- D.2 FUNCTIONAL DESCRIPTION 193
- D.3 DISPLAY MODES 194
- D.6 CONNECTORS 196
- D.6.1 MONITOR CONNECTOR 196
- Changed - October 2000 197
- Appendix E 198
- COMPAQ/NVIDIA QUADRO2 EX/MXR 198
- AGP GRAPHICS CARDS 198
- E.2 FUNCTIONAL DESCRIPTION 199
- E.3 DISPLAY MODES 200
- E.6 CONNECTORS 202
- E.6.1 MONITOR CONNECTOR 202
- Changed - October2001 203
- Appendix F 204
- F.2 FUNCTIONAL DESCRIPTION 205
- F.3 DISPLAY MODES 206
- F.6 CONNECTORS 208
- F.6.1 MONITOR CONNECTOR 208
- Appendix G 210
- G.2 FUNCTIONAL DESCRIPTION 211
- G.3.2 SCSI ADAPTER CONTROL 212
- G.4 SPECIFICATIONS 212
- G.5 SCSI CONNECTORS 213
- Appendix H 216
- PCI GRAPHICS CARD 216
- H.2 FUNCTIONAL DESCRIPTION 217
- H.3 DISPLAY MODES 219
- Original - March 2002 220
- H.7 CONNECTORS 222
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