Compaq 4000N User Manual Page 155
- Page / 196
- Table of contents
- BOOKMARKS
Rated. / 5. Based on customer reviews
Technical Reference Guide
Compaq Deskpro 4000N and 4000S Personal Computers
First Edition - September 1997
8-15
8.4.6 SECURITY FUNCTIONS
The INT 15 AX=E829h BIOS function is used to control various security features of the system.
This function may be issued remotely (over a network) by a driver. A request buffer must be built
(by the driver) for each security feature prior to making the call. This system supports the
following security features:
♦ QuickLock
♦ QuickBlank
♦ Diskette drive boot disable
♦ Diskette drive write disable
♦ IDE controller disable
♦ Serial ports disable
♦ Parallel port disable
♦ Change administrator password
♦ Hood removal sensor
♦ Ownership tag
♦ Asset tag
♦ USB disable
The write-protect function that determines diskette write control is extended to cover all drives
that use removable read/write media (i.e., if diskette write protect is invoked, then any diskette
drive, power drive (SCSI and/or ATAPI), and floptical drive installed will be inaccessible for
(protected from) writes). Client management software should check the following bytes of SIT
record 07h for the location and access method for this bit:
System Information Table, Peripheral and Input Device Record (07h) (partial listing)
Byte Bit Function
1Fh 7-0 Removable Read/Write Media Write Protect Enable Byte Offset (0-255)
20h
7..4
3..0
Removable Read/Write Media Write Protect Enable Bit Location:
CMOS Type:
0000 = CMOS
0001 = High CMOS
0010 = NVRAM
0011 = Flat model NVRAM
Bit Location:
0000 = Bit 0 0100 = Bit 4
0001 = Bit 1 0101 = Bit 5
0010 = Bit 2 0110 = Bit 6
0011 = Bit 3 0111 = Bit 7
- Technical 1
- Reference 1
- Technical Reference Guide 4
- TABLE OF CONTENTS 5
- LIST OF FIGURES 10
- LIST OF TABLES 11
- Chapter 1 13
- INTRODUCTION 13
- Continued 15
- Chapter 2 19
- SYSTEM OVERVIEW 19
- 2.2 FEATURES 20
- 2.2.1 STANDARD FEATURES 20
- 2.2.2 MODEL DIFFERENCES 21
- 2.2.3 OPTIONS 21
- 2.3 MECHANICAL DESIGN 22
- 2.3.1 CABINET LAYOUT 22
- 2.3.2 CHASSIS LAYOUT 24
- 2.3.3 SYSTEM BOARD LAYOUT 25
- 2.4 SYSTEM ARCHITECTURE 26
- 2.4.1 MICROPROCESSOR 28
- 2.4.2 MEMORY 28
- 2.4.3 SUPPORT CHIPSET 29
- 2.4.4 MASS STORAGE 29
- 2.4.7 GRAPHICS SUBSYSTEM 30
- 2.5 SPECIFICATIONS 31
- Chapter 2 System Overview 34
- Chapter 3 35
- PROCESSOR/ 35
- MEMORY SUBSYSTEM 35
- 3.2.1.1 MMX Technology 37
- 3.2.4 SYSTEM MEMORY 39
- Chapter 4 43
- SYSTEM SUPPORT 43
- 4.2 PCI BUS OVERVIEW 44
- 4.2.1 PCI CONNECTOR 45
- 4.2.3 PCI BUS TRANSACTIONS 47
- 4.2.3.2 Configuration Cycles 47
- 4.2.5 PCI INTERRUPT MAPPING 51
- 4.2.6 PCI CONFIGURATION 52
- 4.3 ISA BUS OVERVIEW 53
- 4.3.1 ISA CONNECTOR 54
- 4.3.2 ISA BUS TRANSACTIONS 55
- 4.3.3 DIRECT MEMORY ACCESS 57
- 4.3.3.1 Page Registers 58
- 4.3.4 INTERRUPTS 60
- 4.3.4.1 Maskable Interrupts 60
- NMI- Generation 62
- SMI- Generation 63
- 4.3.5 INTERVAL TIMER 64
- 4.3.6 ISA CONFIGURATION 64
- Chapter 4 System Support 82
- 4.6.1 SYSTEM I/O MAP 83
- 4.7.2 PASSWORD PROTECTION 87
- 4.7.3 I/O SECURITY 88
- 4.7.4 USER SECURITY 88
- 4.7.5 TEMPERATURE SENSING 89
- 4.7.6 POWER MANAGEMENT 90
- Chapter 5 91
- INPUT/OUTPUT INTERFACES 91
- 5.2.2 IDE CONNECTORS 98
- 5.3 DISKETTE DRIVE INTERFACE 100
- 5.4 SERIAL INTERFACES 105
- 5.4.1 RS-232 INTERFACE 105
- 5.5 PARALLEL INTERFACE 111
- 5.6.3.1 8042 Configuration 120
- 5.6.3.2 8042 Control 121
- Continued 122
- (Continued) 123
- 1 DATA Data 4 + 5 VDC Power 124
- 5.7 ETHERNET INTERFACE 125
- 5.7.2 NIC CONNECTORS 126
- 5.8.1 USB CONFIGURATION 127
- 5.8.2 USB CONTROL 128
- 5.8.3 USB CONNECTOR 128
- Chapter 6 129
- GRAPHICS SUBSYSTEM 129
- 6.2 SUBSYSTEM DESCRIPTION 130
- 6.2.3.2 Subsystem Control 132
- MONITOR POWER CONTROL 133
- 6.2.5 CONNECTORS 134
- Chapter 7 135
- POWER and SIGNAL 135
- DISTRIBUTION 135
- 7.2.1 POWER SUPPLY ASSEMBLY 136
- 7.2.2 POWER CONTROL 137
- 7.3 POWER DISTRIBUTION 138
- 7.4 SIGNAL DISTRIBUTION 140
- Chapter 8 141
- BIOS ROM 141
- 8.2 BOOT FUNCTIONS 142
- 8.2.1 BOOT BLOCK 142
- 8.2.2 QUICKBOOT 142
- 8.2.3 SILENTBOOT 142
- ACCESSING CMOS 143
- SETTING DEFAULT PARAMETERS 143
- 8.4.1 SYSTEM ID 147
- Chapter 8 BIOS ROM 148
- Technical Reference Guide 149
- 8.4.3 TEMPERATURE SENSOR 152
- 8.4.4 DRIVE FAULT PREDICTION 152
- 8.4.5 DIMM SUPPORT 153
- 8.4.6 SECURITY FUNCTIONS 155
- 8.5 PNP SUPPORT 157
- 8.6 POWER MANAGEMENT SUPPORT 158
- Appendix A 161
- ERROR MESSAGES AND CODES 161
- Appendix B 173
- ASCII CHARACTER SET 173
- Appendix C 175
- KEYBOARD 175
- C.2 KEYSTROKE PROCESSING 176
- C.2.2 KEYBOARD LAYOUTS 178
- C.2.3 KEYS 181
- Changed - November 1996 182
- C.2.3.3 Windows Keystrokes 183
- C.2.4 KEYBOARD COMMANDS 184
- C.2.5 SCAN CODES 184
- C.3 SCANNER DESCRIPTION 188
- C.3.1 SCANNER OPERATION 189
- Appendix C Keyboard 190
- Compaq Personal Computers 190
- C.3.1.2 Image Quality 191
- C.3.2 SCANNER INTERFACE 192
- C.3.2.1 Pnyb Mode 193
- First Edition – July 1997 195
Related products and manuals for Computers Compaq 4000N
Computers Compaq PRESARIO 6000 User Manual
(82 pages)
(82 pages)
Computers Compaq ALPHA GS320 User Manual
(29 pages)
(29 pages)
Computers Compaq 1500 User Manual
(204 pages)
(204 pages)
Computers Compaq 281862-002 User Manual
(140 pages)
(140 pages)
Computers Compaq 7000 User Manual
(2 pages)
(2 pages)
Computers Compaq 320 User Manual
(34 pages)
(34 pages)
Computers Compaq 6000 User Manual
(142 pages)
(142 pages)
Computers Compaq 4100 User Manual
(38 pages)
(38 pages)
Computers Compaq M300 User Manual
(21 pages)
(21 pages)
Computers Compaq Evo D510 e-pc User Manual
(35 pages)
(35 pages)
Computers Compaq 6000 User Manual
(70 pages)
(70 pages)
Computers Compaq M700 User Manual
(30 pages)
(30 pages)
Computers Compaq PC 5510 User Manual
(10 pages)
(10 pages)
Computers Compaq Presario PC User Manual
(16 pages)
(16 pages)
© 2020, manymanuals.com. All rights reserved. | 3.421 s |
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Comments to this Manuals