INTEL D850GB User Manual

Intel® Desktop Board D850GB
Technical Product Specification
April 2001
The Intel® Desktop Board D850GB may contain design defects or errors known as errata that may cause the product to deviate from published specifications. Current characterized errata are documented in the Intel Desktop Board D850GB Specification Update.
Order Number A26080-002
Revision History
Revision Revision History Date
-001 First release of the Intel® Desktop Board D850GB Technical Product Specification.
-002 Second release of the Intel Desktop Board D850GB Technical Product Specification. Changes include (but not limited to) the following:
Added caution statement in processor section regarding the use of
ATX12V-compliant power supplies
Changed Firmware Hub component to SST 49LF004A
Added AD1885 analog codec as an option to audio subsystem
Listed Diagnostic LEDs as a manufacturing option
Updated fan connector section
Updated BIOS Setup program chapter to reflect latest version of BIOS
Included document changes from the most recent specification update
This product specification applies to only standard D850GB boards with BIOS identifier GB85010A.86A.
Changes to this specification will be published in the Intel Desktop Board D850GB Specification Update before being incorporated into a revision of this document.
September 2000
April 2001
Information in this doc um ent is provided in connection wi t h Intel otherwise, to any intell ectual property rights is granted by this document. E x cept as provided in Intel’s Terms and Conditions of Sale for such products, Intel assumes no liability whatsoever, and I nt el dis claims any express or implied warranty, relating to sale and/or use of I ntel products including liability or warranties relat i ng t o f i t ness for a particular purpose, merchantability, or infringement of any patent, copyright or other int ellec t ual propert y right. Intel products are not intended for use in medical, l i f e saving, or life sustai ni ng appl i cations.
Intel may make changes t o specifications and produc t descriptions at any tim e, without notice.
®
The Intel deviate from published spec i fications. Current charac terized errata are available on request.
Contact your local Int el sales office or your distributor to obtain the latest specifications before pl acing your product order. Copies of documents whic h hav e an orderi ng number and are referenced in this document, or other Intel literature, may be
obtained from: Intel Corporation
P.O. Box 5937 Denver, CO 80217-9808
or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777, Germany 44-0-1793-421-333, other Countries 708-296-9333.
Third-party brands and names are the property of their respective owners.
Copyright 2000, 2001, Intel Corporat i on. All rights reserved.
Desktop Board D850GB may contain design defects or errors k nown as errata that may cause the produc t to
®
products. No license, express or implied, by est oppel or

Preface

This Technical Product Specification (TPS) specifies the board layout, components, connectors, power and environmental requirements, and the BIOS for the Intel Desktop Board D850GB. It describes the standard product and available manufacturing options.

Intended Audience

The TPS is intended to provide detailed, technical information about the D850GB board and its components to the vendors, system integrators, and other engineers and technicians who need this level of information. It is specifically not intended for general audiences.

What This Document Contains

Chapter Description
1 A description of the hardware used on the D850GB board 2 A map of the resources of the board 3 The features supported by the BIOS Setup program 4 The contents of the BIOS Setup program’s menus and submenus
5 A description of the BIOS error messages, beep codes, POST codes, and diagnostic
LEDs

Typographical Conventions

This section contains information about the conventions used in this specification. Not all of these symbols and abbreviations appear in all specifications of this type.

Notes, Cautions, and Warnings

NOTE
Notes call attention to important information.
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.
WARNING
Warnings indicate conditions, which if not observed, can cause personal injury.
iii
Intel Desktop Board D850GB Technical Product Specification

Other Common Notation

# Used after a signal name to identify an active-low signal (such as USBP0#) (NxnX) When used in the description of a component, N indicates component type, xn are the relative
coordinates of its location on the D850GB board, and X is the instance of the particular part at that general location. For example, J5J1 is a connector, located at 5J. It is the first connector
in the 5J area. GB Gigabyte (1,073,741,824 bytes) GB/sec Gigabytes per second KB Kilobyte (1024 bytes) Kbit Kilobit (1024 bits) kbits/sec 1000 bits per second MB Megabyte (1,048,576 bytes) MB/sec Megabytes per second Mbit Megabit (1,048,576 bits) Mbit/sec Megabits per second xxh An address or data value ending with a lowercase h indicates a hexadecimal value. x.x V Volts. Voltages are DC unless otherwise specified.
This symbol is used to indicate third-party brands and names that are the property of their
respective owners.
iv

Contents

1 Product Description
1.1 Overview....................................................................................................................12
1.1.1 Feature Summary ........................................................................................12
1.1.2 Manufacturing Options.................................................................................13
1.1.3 D850GB Board Layout.................................................................................14
1.1.4 Block Diagram..............................................................................................15
1.2 Online Support ...........................................................................................................16
1.3 Design Specifications .................................................................................................16
1.4 Processor...................................................................................................................19
1.5 System Memory .........................................................................................................20
1.5.1 Memory Features.........................................................................................20
1.5.2 Continuity RIMM Modules............................................................................20
1.5.3 RDRAM Memory Configuration....................................................................21
1.6 Intel® 850 Chipset.......................................................................................................22
1.6.1 AGP.............................................................................................................23
1.6.2 USB..............................................................................................................23
1.6.3 IDE Support .................................................................................................24
1.6.4 Real-Time Clock, CMOS SRAM, and Battery...............................................25
1.6.5 SST 49LF004A 4 Mbit Firmware Hub (FWH) ...............................................25
1.7 I/O Controller..............................................................................................................26
1.7.1 Serial Port....................................................................................................26
1.7.2 Parallel Port..................................................................................................26
1.7.3 Diskette Drive Controller ..............................................................................27
1.7.4 Keyboard and Mouse Interface....................................................................27
1.8 Audio Subsystem (Optional).......................................................................................28
1.8.1 Audio Connectors.........................................................................................29
1.8.2 Audio Subsystem Software..........................................................................29
1.9 LAN Subsystem..........................................................................................................30
1.9.1 Intel® 82562EM Platform LAN Connect Device (Optional)............................30
1.9.2 RJ-45 LAN Connector with Integrated LEDs (Optional)................................30
1.9.3 LAN Subsystem Software............................................................................31
1.10 CNR (Optional)...........................................................................................................31
1.11 Hardware Management Subsystem............................................................................32
1.11.1 Hardware Monitor Component .....................................................................32
1.11.2 Fan Control and Monitoring..........................................................................32
1.12 Power Management ...................................................................................................33
1.12.1 Software Support.........................................................................................33
1.12.2 Hardware Support........................................................................................37
2 Technical Reference
2.1 Introduction.................................................................................................................43
2.2 Memory Map..............................................................................................................43
2.3 I/O Map ......................................................................................................................44
v
Intel Desktop Board D850GB Technical Product Specification
2.4 DMA Channels...........................................................................................................46
2.5 PCI Configuration Space Map....................................................................................46
2.6 Interrupts....................................................................................................................47
2.7 PCI Interrupt Routing Map ..........................................................................................47
2.8 Connectors.................................................................................................................49
2.8.1 Back Panel Connectors................................................................................50
2.8.2 Internal I/O Connectors................................................................................53
2.8.3 External I/O Connectors...............................................................................65
2.9 Jumper Blocks............................................................................................................68
2.9.1 BIOS Setup Configuration Jumper Block......................................................69
2.9.2 USB Port 2 Routing Jumper Block ...............................................................69
2.10 Mechanical Considerations.........................................................................................70
2.10.1 Form Factor .................................................................................................70
2.10.2 I/O Shield.....................................................................................................71
2.11 Electrical Considerations............................................................................................72
2.11.1 Power Consumption.....................................................................................72
2.11.2 Add-in Board Considerations........................................................................72
2.11.3 Standby Current Requirements....................................................................73
2.11.4 Fan Connector Current Capability................................................................74
2.11.5 Power Supply Considerations ......................................................................74
2.12 Thermal Considerations..............................................................................................75
2.13 Reliability....................................................................................................................76
2.14 Environmental ............................................................................................................77
2.15 Regulatory Compliance..............................................................................................78
2.15.1 Safety Regulations.......................................................................................78
2.15.2 EMC Regulations.........................................................................................78
2.15.3 Certification Markings...................................................................................79
3 Overview of BIOS Features
3.1 Introduction.................................................................................................................81
3.2 BIOS Flash Memory Organization..............................................................................82
3.3 Resource Configuration ..............................................................................................82
3.3.1 PCI Autoconfiguration..................................................................................82
3.3.2 PCI IDE Support...........................................................................................82
3.4 System Management BIOS (SMBIOS).......................................................................83
3.5 Legacy USB Support..................................................................................................83
3.6 BIOS Updates ............................................................................................................84
3.6.1 Language Support........................................................................................84
3.6.2 Custom Splash Screen.................................................................................85
3.7 Recovering BIOS Data...............................................................................................85
3.8 Boot Options...............................................................................................................86
3.8.1 CD-ROM and Network Boot.........................................................................86
3.8.2 Booting Without Attached Devices...............................................................86
3.9 Fast Booting Systems with Intel® Rapid BIOS Boot....................................................86
3.9.1 Peripheral Selection and Configuration........................................................86
3.9.2 Intel Rapid BIOS Boot..................................................................................87
3.9.3 Operating System ........................................................................................87
3.10 BIOS Security Features..............................................................................................88
vi
Contents
4 BIOS Setup Program
4.1 Introduction.................................................................................................................89
4.2 Maintenance Menu.....................................................................................................90
4.2.1 Extended Configuration Submenu................................................................91
4.3 Main Menu..................................................................................................................92
4.4 Advanced Menu..........................................................................................................93
4.4.1 Boot Configuration Submenu .......................................................................94
4.4.2 Peripheral Configuration Submenu...............................................................95
4.4.3 IDE Configuration Submenu.........................................................................97
4.4.4 Diskette Configuration Submenu................................................................100
4.4.5 Event Log Configuration Submenu.............................................................101
4.4.6 Video Configuration Submenu....................................................................102
4.5 Security Menu..........................................................................................................103
4.6 Power Menu.............................................................................................................104
4.7 Boot Menu................................................................................................................105
4.8 Exit Menu................................................................................................................. 107
5 Error Messages and Beep Codes
5.1 BIOS Error Messages...............................................................................................109
5.2 Port 80h POST Codes..............................................................................................111
5.3 Bus Initialization Checkpoints...................................................................................115
5.4 Speaker ...................................................................................................................116
5.5 BIOS Beep Codes....................................................................................................116
5.6 Diagnostic LEDs (Optional) ......................................................................................118
Figures
1. D850GB Board Components......................................................................................14
2. Block Diagram............................................................................................................15
3. Intel 850 Chipset Block Diagram.................................................................................22
4. Audio Subsystem Block Diagram................................................................................28
5. ICH2 and CNR Signal Interface..................................................................................31
6. Using the Wake on LAN Technology Connector.........................................................39
7. Location of the Standby Power Indicator LED............................................................40
8. Back Panel Connectors..............................................................................................50
9. Audio Connectors.......................................................................................................54
10. Power and Hardware Control Connectors..................................................................56
11. Add-in Board and Peripheral Interface Connectors.....................................................59
12. External I/O Connectors.............................................................................................65
13. Location of the Jumper Blocks....................................................................................68
14. D850GB Board Dimensions........................................................................................70
15. I/O Shield Dimensions................................................................................................71
16. Localized High Temperature Zones............................................................................75
17. Diagnostic LEDs.......................................................................................................118
vii
Intel Desktop Board D850GB Technical Product Specification
Tables
1. Feature Summary.......................................................................................................12
2. Manufacturing Options ...............................................................................................13
3. Specifications.............................................................................................................16
4. Supported Processors................................................................................................19
5. Supported Memory Configurations.............................................................................21
6. LAN Connector LED States........................................................................................30
7. Effects of Pressing the Power Switch.........................................................................34
8. Power States and Targeted System Power................................................................35
9. Wake Up Devices and Events....................................................................................36
10. Fan Connector Descriptions.......................................................................................38
11. System Memory Map..................................................................................................43
12. I/O Map ......................................................................................................................44
13. DMA Channels...........................................................................................................46
14. PCI Configuration Space Map....................................................................................46
15. Interrupts....................................................................................................................47
16. PCI Interrupt Routing Map ..........................................................................................48
17. PS/2 Mouse/Keyboard Connector..............................................................................51
18. USB Connectors.........................................................................................................51
19. Parallel Port Connector...............................................................................................51
20. Serial Port Connector.................................................................................................52
21. LAN Connector (optional)...........................................................................................52
22. Audio Line In Connector (optional).............................................................................52
23. Audio Line Out Connector (optional)...........................................................................52
24. Mic In Connector (optional).........................................................................................52
25. Optional Auxiliary Line In Connector (J2C1)...............................................................55
26. Optional ATAPI CD-ROM Connector (J2D1)..............................................................55
27. Optional CD-ROM Legacy Style Connector (J2D2)....................................................55
28. PC/PCI Connector (J6D1)..........................................................................................55
29. ATX12V Power Connector (J3H1)..............................................................................57
30. Processor Voltage Regulator Fan Connector (J3M1) .................................................57
31. RIMM Fan Connector (J7M2).....................................................................................57
32. Processor Fan Connector (J6L1)................................................................................57
33. Main Power Connector (J10K1)..................................................................................58
34. Auxiliary Power (J9J1)................................................................................................58
35. Wake on Ring Connector (J8C1)................................................................................58
36. Wake on LAN Technology Connector (J7C1).............................................................58
37. Chassis Fan Connector (J10A2).................................................................................58
38. CNR Connector (J3A1)...............................................................................................60
39. PCI Bus Connectors (J4A1, J4B1, J4C1, J4D1, J4E1)...............................................61
40. AGP Connector (J5E1) ...............................................................................................62
41. PCI IDE Connectors (J9G2, Primary and J9G1, Secondary)......................................63
42. Diskette Drive Connector (J10G1)..............................................................................64
43. SCSI LED Connector (J7A2)......................................................................................66
44. Front Panel USB Connector (J9C1)............................................................................66
45. Auxiliary Front Panel Power/Sleep/Message Waiting LED Connector (J8C3).............66
46. Front Panel Connector (J9D2)....................................................................................66
viii
Contents
47. States for a One Color Power LED.............................................................................67
48. States for a Two Color Power LED.............................................................................67
49. BIOS Setup Configuration Jumper Settings (J8C2)....................................................69
50. USB Port 2 Routing Jumper Settings (J8D1)..............................................................69
51. Power Usage..............................................................................................................72
52. Standby Current Requirements..................................................................................73
53. Thermal Considerations for Components...................................................................76
54. D850GB Board Environmental Specifications.............................................................77
55. Safety Regulations.....................................................................................................78
56. EMC Regulations........................................................................................................78
57. Supervisor and User Password Functions..................................................................88
58. BIOS Setup Program Menu Bar.................................................................................89
59. BIOS Setup Program Function Keys ..........................................................................90
60. Maintenance Menu.....................................................................................................90
61. Extended Configuration Submenu..............................................................................91
62. Main Menu..................................................................................................................92
63. Advanced Menu..........................................................................................................93
64. Boot Configuration Submenu......................................................................................94
65. Peripheral Configuration Submenu.............................................................................95
66. IDE Configuration Submenu.......................................................................................97
67. Primary/Secondary IDE Master/Slave Submenus.......................................................98
68. Diskette Configuration Submenu..............................................................................100
69. Event Log Configuration Submenu...........................................................................101
70. Video Configuration Submenu..................................................................................102
71. Security Menu..........................................................................................................103
72. Power Menu.............................................................................................................104
73. Boot Menu................................................................................................................105
74. Exit Menu................................................................................................................. 107
75. BIOS Error Messages...............................................................................................109
76. Uncompressed INIT Code Checkpoints....................................................................111
77. Boot Block Recovery Code Checkpoints ..................................................................111
78. Runtime Code Uncompressed in F000 Shadow RAM ..............................................112
79. Bus Initialization Checkpoints...................................................................................115
80. Upper Nibble High Byte Functions............................................................................115
81. Lower Nibble High Byte Functions............................................................................116
82. Beep Codes..............................................................................................................117
83. Diagnostic LED Codes..............................................................................................119
ix
Intel Desktop Board D850GB Technical Product Specification
x

1 Product Description

What This Chapter Contains
1.1 Overview....................................................................................................................12
1.2 Online Support ...........................................................................................................16
1.3 Design Specifications.................................................................................................16
1.4 Processor...................................................................................................................19
1.5 System Memory .........................................................................................................20
®
1.6 Intel
1.7 I/O Controller..............................................................................................................26
1.8 Audio Subsystem (Optional).......................................................................................28
1.9 LAN Subsystem..........................................................................................................30
1.10 CNR (Optional)...........................................................................................................31
1.11 Hardware Management Subsystem............................................................................32
1.12 Power Management ...................................................................................................33
850 Chipset.......................................................................................................22
11
Intel Desktop Board D850GB Technical Product Specification

1.1 Overview

1.1.1 Feature Summary

Table 1 summarizes the D850GB board’s major features.
Table 1. Feature Summary
Form Factor Processor
Memory
Chipset
I/O Control Video Peripheral
Interfaces
Expansion Capabilities
BIOS
Instantly Available PC
Wake on LAN† Technology Connector
Hardware Monitoring features
Enhanced thermal monitor and fan control device
For information about Refer to
The board’s compliance level with APM, ACPI, Plug and Play, and SMBIOS. Section 1.3, page 16
ATX (12.0 inches by 9.6 inches)
Support for an Intel
400 MHz system data bus
Two Direct-RDRAM banks with two RIMM
Support for up to 2 GB of system memory using PC600 or PC800 RDRAM
Intel® 850 Chipset, consisting of:
®
Intel
Intel
SST 49LF004A 4 Mbit Firmware Hub (FWH)
SMSC LPC47M102 LPC bus I/O controller
AGP connector supporting 1.5 V 4X AGP cards
Four Universal Serial Bus (USB) ports
One serial port
One parallel port
Two IDE interfaces with Ultra DMA, ATA-33/66/100 support
One diskette drive interface
PS/2
Five PCI bus add-in card connectors (SMBus routed to PCI bus connector 2)
Intel/AMI BIOS (resident in the SST 49LF004A 4 Mbit FWH)
Support for Advanced Power Management (APM), Advanced Configuration and
Support for
Suspend to RAM support
Wake on PCI, CNR, RS-232, front panel, PS/2 keyboard, and USB ports
Support for system wake up using an add-in network interface card with remote wake up capability
Two fan sense inputs used to monitor fan activity
Two additional fan sense inputs
Two additional thermal sense inputs
82850 Memory Controller Hub (MCH)
®
82801BA I/O Controller Hub (ICH2)
keyboard and mouse ports
Power Interface (ACPI), Plug and Play, and SMBIOS
PCI Local Bus Specification Revision 2.2
®
Pentium® 4 processor
s per bank (four RIMM sockets)
12
Product Description

1.1.2 Manufacturing Options

Table 2 describes the D850GB board’s manufacturing options. Not every manufacturing option is available in all marketing channels. Please contact your Intel representative to determine which manufacturing options are available to you.
Table 2. Manufacturing Options
Audio (Integrated)
Video
LAN Hardware Monitor
Subsystem
CNR
Diagnostic LEDs
Audio subsyst em that uses the Analog Devices AD1881/AD1885 analog codec for AC 97 processing
AGP Pro50 interface (50 W maximum); backward compatible with 1.5 V AGP video cards.
This option uses an AGP Pro 1.5 V connector, also known as an AGP Pro50 connector.
®
Intel
82562EM 10/100 Mbit/sec Platform LAN Connect (PLC) device
Heceta 4 Hardware Monitor:
Voltage sense to detect out of range power supply voltages
Thermal sense to detect out of range thermal values
One Communication and Networking Riser (CNR) connector (slot shared with PCI bus connector 5, J4A1)
Four dual-color LEDs on back panel
13
Intel Desktop Board D850GB Technical Product Specification

1.1.3 D850GB Board Layout

Figure 1 shows the location of the major components on the D850GB board.
B
C
DA
E
V
U
F
G
T
S
H
I
R
Q
P L JO
N
M
K
A AD1881/AD1885 audio codec (optional) L Diskette drive connector B AGP connector (AGP Pro 1.5V connector
optional)
C Intel 82850 Memory Controller Hub (MCH) O SMSC LPC47M102 I/O Controller D Back panel connectors P Front panel connector E +12V power connector (ATX12V) Q Enhanced thermal monitor and fan control device F Pentium 4 Processor socket R Battery G Hardware monitor S SST 49LF004A 4 Mbit Firmware Hub (FWH)
H RAMBUS I RAMBUS Bank 1 (RIMM3 and RIMM4) U PCI bus add-in card connectors J K Power connector
Auxiliary Power connector
Bank 0 (RIMM1 and RIMM2) T Speaker
M N IDE connectors
Intel 82801BA I/O Controller Hub (ICH2)
V Communication and Networking Riser (CNR)
connector (optional)
OM10441
Figure 1. D850GB Board Components
14

1.1.4 Block Diagram

Figure 2 is a block diagram of the major functional areas of the D850GB board.
Primary/
Secondary IDE
ATA-33/66/100
Product Description
Diagnostic
LEDs
(Optional)
PGA423
Processor Socket
AGP
Interface
4X AGP
Connector
(1.5 V only)
or
AGP Pro50
Connector
(optional)
Hardware
Monitors
(optional)
System Bus
(400 MHz)
82850 Memory
Controller Hub
(MCH)
Dual RAMBUS
Channels
RAMBUS Bank 0
(RIMM1 and RIMM2)
RAMBUS Bank 1
(RIMM3 and RIMM4)
SMBus
850 Chipset
AHA
Bus
82801BA
I/O Controller Hub
(ICH2)
CSMA/CD
Unit
Interface
USB
LPC
Bus
LPC I/O
Controller
Physical
Layer
Interface
USB Ports 0 and 1
USB Ports 2 and 3
SST 49LF004A
Firmware Hub
(FWH)
Diskette Drive
Connector
Serial Port Parallel Port PS/2 Mouse
PS/2 Keyboard
LAN
Connector
(optional)
CNR
Connector
(optional)
CD-ROM
Line In
Line Out
Mic In
OM11731
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
PCI Bus
PCI Slot 5
= connector or socket
AC Link
AD1881/
AD1885
Audio
Codec
(optional)
Auxiliary Line In
Figure 2. Block Diagram
15
Intel Desktop Board D850GB Technical Product Specification

1.2 Online Support

To find information about… Visit this World Wide Web site:
Intel’s D850GB board under “Product Info” or “Customer Support”
Processor data sheets http://www.intel.com/design/litcentr Proper date access in systems with Intel®
motherboards ICH2 addressing http://developer.intel.com/design/chipsets/datashts Custom splash screens http://intel.com/design/motherbd/gen_indx.htm Audio software and utilities http://www.intel.com/design/motherbd LAN software and drivers http://www.intel.com/design/motherbd
http://www.intel.com/design/motherbd http://support.intel.com/support/motherboards/desktop
http://support.intel.com/support/year2000

1.3 Design Specifications

Table 3 lists the specifications applicable to the D850GB board.
Table 3. Specifications
Reference Name
AC ‘97
ACPI
AGP
AMI BIOS
APM
ATA/ ATAPI-5
Specification Title
Audio Codec ‘97
Advanced Configuration and Power Interface Specification
Accelerated Graphics Port Interface Specification
American Megatrends BIOS Specification
Advanced Power Management BIOS Interface Specification
Information Technology ­AT Attachment with Packet Interface -5, (ATA/ATAPI-5)
Version, Revision Date, and Ownership
Version 2.1, May 1998, Intel Corporation
Version 2.0, July 27, 2000, Compaq Computer Corp., Intel Corporation, Microsoft Corporation, and Toshiba Corporation
Version 2.0, May 4, 1998, Intel Corporation
AMIBIOS 99, 1999 American Megatrends, Inc.
Version 1.2, February 1996, Intel Corporation and Microsoft Corporation
Revision 3 February 29, 2000, Contact: T13 Chair, Seagate Technology
The information is
available from… ftp://download.intel.com/ial/
scalableplatforms/ac97r22.pdf
http://www.teleport.com/~acpi/
http://www.agpforum.org/
http://www.amij.com/amibios/ bios.platforms.desktop.html
http://www.microsoft.com/ hwdev/busbios/amp_12.htm
http://www.t13.org
continued
16
Table 3. Specifications (continued)
Reference Name
ATX
ATX12V
BIS Boot Integrity Services Version 1.0 for WfM 2.0
CNR
EPP
El Torito
LPC
PCI
Plug and Play
PXE
RIMM
Specification Title
ATX Specification
ATX / ATX12V Power Supply Design Guide
Communication and Network Riser (CNR) Specification
IEEE std 1284.1-1997
Enhanced Parallel Port
Bootable CD-ROM format specification
Low Pin Count Interface Specification
PCI Local Bus Specification
PCI Bus Power Management Interface Specification
Plug and Play BIOS Specification
Preboot Execution Environment
Rambus Serial Presence Detect (SPD) Specification
Rambus RIMM Specification
Version, Revision Date and Ownership
Version 2.03, December 1998, Intel Corporation.
Version 1.1, August 2000, Intel Corporation
August 1999, Intel Corporation
Version 1.1, October 18, 2000, Intel Corporation.
Version 1.7, 1997, Institute of Electrical and Electronic Engineers
Version 1.0, January 25, 1995, Phoenix Technologies Ltd., and IBM Corporation
Version 1.0, September 29, 1997, Intel Corporation
Version 2.2, December 18, 1998, PCI Special Interest Group
Version 1.1, December 18, 1998, PCI Special Interest Group
Version 1.0a, May 5, 1994, Compaq Computer Corp., Phoenix Technologies Ltd., and Intel Corporation
Version 2.1, September 1999, Intel Corporation
Version 1.0, March 1999, Rambus Corp.
Version 1.0, February 1999, Rambus Corp.
Product Description
The information is
available from… http://www.formfactors.org/
developer/specs/atx/ atxspecs.htm
http://www.formfactors.org/ developer/specs/atx/ atxspecs.htm
http://developer.intel.com/ design/security/bis/ bisfaq.htm
http://developer.intel.com/ technology/cnr/index.htm
http://standards.ieee.org/ reading/ieee/std_public/ description/busarch/
1284.1-1997_desc.html http://www.ptltd.com/
techs/specs.html
http://www.intel.com/ design/chipsets/industry/ lpc.htm
http://www.pcisig.com/
http://www.pcisig.com/
http://www.microsoft.com/ hwdev/respec/ pnpspecs.htm
http://developer.intel.com/ ial/WfM/wfm20/design/ mapxe/index.htm
http://www.rambus.com/ developer/ support_rimm.html
http://www.rambus.com/ developer/ development_support.html
continued
17
Intel Desktop Board D850GB Technical Product Specification
Table 3. Specifications (continued)
Reference Name
SMBIOS
UHCI
USB
WfM
Specification Title
System Management BIOS
Universal Host Controller Interface Design Guide
Universal Serial Bus Specification
Wired for Management Baseline
Version, Revision Date and Ownership
Version 2.3.1, March 16, 1999, American Megatrends Inc., Award Software International Inc., Compaq Computer Corporation Dell Computer Corporation, Hewlett-Packard Company, Intel Corporation, International Business Machines Corporation, Phoenix Technologies Limited, and SystemSoft Corporation.
Version 1.1, March 1996, Intel Corporation
Version 1.1, September 23, 1998, Compaq Computer Corporation, Intel Corporation, Microsoft Corporation, and NEC Corporation
Version 2.0, December 18, 1998, Intel Corporation
The information is
available from… http://developer.intel.com/
ial/wfm/design/smbios
http://www.usb.org/ developers
http://www.usb.org/ developers
http://developer.intel.com/ ial/WfM/wfmspecs.htm
18
Product Description

1.4 Processor

CAUTION
Use only the processors listed below. Use of unsupported processors can damage the D850GB
®
board, the processor, and the power supply. See the Intel Update for the most up-to-date list of supported processors for the D850GB board.
The D850GB board supports a single Pentium 4 processor with a system bus of 400 MHz. The D850GB board supports the processors listed in Table 4. All supported onboard memory can be cached, up to the cachability limit of the processor. See the processor’s data sheet for cachability
limits.
Table 4. Supported Processors
Type Designation System Bus L2 Cache Size
Pentium 4 processor 1.3, 1.4, and 1.5 GHz 400 MHz 256 KB
CAUTION
Use only an ATX12V-compliant power suppIy with this board. ATX12V power supplies have two additional power leads that provide required supplemental power for the Intel Pentium processor and the Intel 850 chipset. Always connect both additional power supply leads of the ATX12V power supply, otherwise the board and the processor could be damaged.
Desktop Board 850GB Specification
4
Do not use a standard ATX power supply. Doing so could damage the board and the processor.
For information about Refer to
Processor support Section 1.2, page 16 Processor usage Section 1.2, page 16 Power supply connectors Section 2.8.2.3, page 56
19
Intel Desktop Board D850GB Technical Product Specification

1.5 System Memory

CAUTION
Turn off the power and unplug the power cord before installing or removing RIMM modules. Failure to do so could damage the memory and the D850GB board. (After removing AC power the standby power indicator LED should not be lit. See Figure 7 on page 40 for the location of the standby power indicator LED.)
NOTE
The board supports combinations of no more than 32 RDRAM components per RDRAM bank. If the total number of RDRAM components installed in all RIMM sockets exceeds 64, the computer will not boot.

1.5.1 Memory Features

The 82850 Memory Controller Hub integrates two lock-stepped Direct Rambus banks, providing a processor-to-memory bandwidth up to 3.2 GB/sec. The D850GB board has four RIMM sockets (two sockets for each bank) and supports the following memory features:
Single- or double-sided RIMM configurations
Maximum of 32 Direct Rambus devices per bank
Memory configurations from 128 MB (minimum) to 2 GB (maximum) utilizing 128 Mbit or
256 Mbit technology PC600 or PC800 compliant RDRAM
Serial Presence Detect (SPD) based configuration for optimal memory operation
Suspend to RAM support
ECC and non-ECC support

1.5.2 Continuity RIMM Modules

All RIMM sockets must be populated to achieve continuity for termination at the Rambus
interface. Continuity RIMMs (or “pass-through” modules) must be installed in the second RDRAM bank if memory is not installed. If any of the RIMM sockets are not populated, the computer will not complete the Power-On Self-Test (POST) and the BIOS beep codes will not be heard.
20
Product Description

1.5.3 RDRAM Memory Configuration

When installing memory, note the following:
The four RIMM sockets are grouped into two banks: Bank 0 (labeled on the board as RIMM1 and RIMM2) Bank 1 (labeled on the board as RIMM3 and RIMM4)
Bank 0 must be populated first ensuring that the RDRAM installed in RIMM1 and RIMM2 is
identical in speed, size, and density. For example, the minimum system configuration would use two 64 MB RIMM modules of PC600 or PC800 RDRAM.
If the desired memory configuration has been achieved by populating Bank 0, then Bank 1 should be filled with two Continuity RIMMs.
If memory is to be installed in Bank 1, the RIMM modules installed in RIMM3 and RIMM4 must be identical in size and density to each other, and match the speed of the RIMM modules in Bank 0. The RIMM modules do not, however, need to match those in Bank 0 in size and density. For example, if Bank 0 has two 128 MB RIMMs of PC800 RDRAM, Bank 1 would require PC800 RDRAM also, however, any other supported RIMM modules such as 64 MB or 192 MB could be used.
If ECC functionality is required, all installed RIMM modules must be ECC-compliant
Table 5 gives examples of RDRAM component density for various RIMM modules. Component density (counts) can be identified on the RIMM label.
Table 5. Supported Memory Configurations
Rambus Technology
128/144 Mbit 64 MB 96 MB 128 MB 192 MB 256 MB 256/288 Mbit 128 MB 192 MB 256 MB 384 MB 512 MB
Capacity with 4 DRAM Components per RIMM
Capacity with 6 DRAM Components per RIMM
Capacity with 8 DRAM Components per RIMM
Capacity with 12 DRAM Components per RIMM
Capacity with 16 DRAM Components per RIMM
21
Intel Desktop Board D850GB Technical Product Specification

1.6 Intel® 850 Chipset

The Intel 850 chipset consists of the following devices:
82850 Memory Controller Hub (MCH) with Accelerated Hub Architecture (AHA) bus
82801BA I/O Controller Hub (ICH2) with AHA bus
SST 49LF004A Firmware Hub (FWH)
The MCH is a centralized controller for the system bus, the memory bus, the AGP bus, and the
Accelerated Hub Architecture interface. The ICH2 is a centralized controller for the board’s I/O paths. The FWH provides the nonvolatile storage of the BIOS. The component combination provides the chipset interfaces as shown in Figure 3.
ATA-33/66/100
System Bus
Network
USB
850 Chipset
82850
Memory Controller
Hub (MCH)
Dual RAMBUS
Channels
AHA
Bus
AGP
Interface
82801BA
I/O Controller Hub
(ICH2)
SST 49LF004A
Firmware Hub
(FWH)
LPC Bus
AC LinkPCI BusSMBus
OM11732
Figure 3. Intel 850 Chipset Block Diagram
For information about Refer to
The Intel 850 chipset http://developer.intel.com The SST 49LF004A Firmware Hub http://www.ssti.com Chipset resources Section 1.3, page 16
22
Product Description

1.6.1 AGP

NOTE
The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy 3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V AGP cards.
The AGP connector supports AGP add-in cards with 1.5 V Switching Voltage Level (SVL). An AGP Pro50 interface is available (for a 50 W maximum power draw) as a manufacturing option. Legacy 3.3 V AGP cards are not supported and will prevent the system from booting if installed.
For information about Refer to
The location of the AGP connector Figure 1, page 14 The signal names of the AGP connector Table 40, page 62
AGP is a high-performance interface for graphics-intensive applications, such as 3D applications. While based on the PCI Local Bus Specification, Rev. 2.1, AGP is independent of the PCI bus and is intended for exclusive use with graphical display devices. AGP overcomes certain limitations of the PCI bus related to handling large amounts of graphics data with the following features:
Pipelined memory read and write operations that hide memory access latency
Demultiplexing of address and data on the bus for nearly 100 percent efficiency
For information about Refer to
Obtaining the
Accelerated Graphics Port Interface Specification
Section 1.3, page 16

1.6.2 USB

The ICH2 contains two separate USB controllers supporting four USB ports. One USB peripheral can be connected to each port. For more than four USB devices, an external hub can be connected to any of the ports. Two of the USB ports are implemented with stacked back panel connectors. The other two are accessible via the front panel USB connector at location J9C1. One of the front panel USB connectors can be routed to the optional CNR connector. The D850GB board fully supports UHCI and uses UHCI-compatible software drivers.
NOTE
Computer systems that have an unshielded cable attached to a USB port may not meet FCC Class B requirements, even if no device is attached to the cable. Use shielded cable that meets the requirements for full-speed devices.
For information about Refer to
The location of the USB connectors on the back panel Figure 8, page 50 The signal names of the back panel USB connectors Table 18, page 51 The location of the front panel USB connector Figure 12, page 65 The signal names of the front panel USB connector Table 44, page 66 The USB specification and UHCI Section 1.3, page 16
23
Intel Desktop Board D850GB Technical Product Specification

1.6.3 IDE Support

1.6.3.1 IDE Interfaces
The ICH2’s IDE controller has two independent bus-mastering IDE interfaces that can be independently enabled. The IDE interfaces support the following modes:
Programmed I/O (PIO): processor controls data transfer.
8237-style DMA: DMA offloads the processor, supporting transfer rates of up to 16 MB/sec.
Ultra DMA: DMA protocol on IDE bus supporting host and target throttling and transfer rates
of up to 33 MB/sec.
ATA-66: DMA protocol on IDE bus supporting host and target throttling and transfer rates of up to 66 MB/sec. ATA-66 protocol is similar to Ultra DMA and is device driver compatible.
ATA-100: DMA protocol on IDE bus allows host and target throttling. The ICH2’s ATA-100 logic can achieve read transfer rates up to 100 MB/sec and write transfer rates up to 88 MB/sec.
NOTE
ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections, noise, and inductive coupling.
The IDE interfaces also support ATAPI devices (such as CD-ROM drives) and ATA devices using the transfer modes listed in Section 4.4.3.1 on page 98.
The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS) translation modes. The drive reports the transfer rate and translation mode to the BIOS.
The D850GB board supports Laser Servo (LS-120) diskette technology through its IDE interfaces. An LS-120 drive can be configured as a boot device by setting the BIOS Setup program’s Boot menu to one of the following:
ARMD-FDD (ATAPI removable media device – floppy disk drive)
ARMD-HDD (ATAPI removable media device – hard disk drive)
For information about Refer to
The location of the IDE connectors Figure 11, page 59 The signal names of the IDE connectors Table 41, page 63
BIOS Setup program’s Boot menu Table 73, page 105
24
Product Description
1.6.3.2 SCSI Hard Drive Activity LED Connector
The SCSI hard drive activity LED connector is a 1 x 2-pin connector that allows an add-in SCSI controller to use the same LED as the onboard IDE controller. For proper operation, this connector should be wired to the LED output of the add-in SCSI controller. The LED indicates when data is being read from, or written to, both the add-in SCSI controller and the IDE controller.
For information about Refer to
The location of the SCSI hard drive activity LED connector Figure 12, page 65 The signal names of the SCSI hard drive activity LED connector Table 43, page 66

1.6.4 Real-Time Clock, CMOS SRAM, and Battery

The real-time clock provides a time-of-day clock and a multicentury calendar with alarm features. The real-time clock supports 256 bytes of battery-backed CMOS SRAM in two banks that are reserved for BIOS use.
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer is not plugged into a wall socket, the battery has an estimated life of three years. When the computer is plugged in, the standby current from the power supply extends the life of the battery. The clock is accurate to ± 13 minutes/year at 25 ºC with 3.3 VSB applied.
The time, date, and CMOS values can be specified in the BIOS Setup program. The CMOS values can be returned to their defaults by using the BIOS Setup program.
NOTE
If the battery and AC power fail, custom defaults, if previously saved, will be loaded into CMOS RAM at power-on.
For information about Refer to
Proper date access in systems with D850GB boards Section 1.2, page 16

1.6.5 SST 49LF004A 4 Mbit Firmware Hub (FWH)

The FWH provides the following:
System BIOS program
System security and manageability logic that enables protection for storing and updating of
platform information
25
Intel Desktop Board D850GB Technical Product Specification

1.7 I/O Controller

The SMSC LPC47M102 I/O controller provides the following features:
3.3 V operation
One serial port
One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
Serial IRQ interface compatible with serialized IRQ support for PCI systems
PS/2-style mouse and keyboard interfaces
Interface for one 1.2 MB or 1.44 MB diskette drive
Intelligent power management, including a programmable wake up event interface
PCI power management support
One fan tachometer input
The BIOS Setup program provides configuration options for the I/O controller.
For information about Refer to
SMSC LPC47M102 I/O controller http://www.smsc.com

1.7.1 Serial Port

The D850GB board has one serial port connector on the back panel. The serial port’s NS16C550­compatible UART supports data transfers at speeds up to 115.2 kbits/sec with BIOS support. The serial port can be assigned as COM1 (3F8h), COM2 (2F8h), COM3 (3E8h), or COM4 (2E8h).
For information about Refer to
The location of the serial port connector Figure 8, page 50 The signal names of the serial port connector Table 20, page 52

1.7.2 Parallel Port

The 25-pin D-Sub parallel port connector located on the back panel. In the BIOS Setup program, the parallel port can be set to the following modes:
Output only (PC AT
Bi-directional (PS/2 compatible)
EPP
ECP
For information about Refer to
The location of the parallel port connector Figure 8, page 50 The signal names of the parallel port connector Table 19, page 51
Setting the parallel port’s mode Table 65, page 95
-compatible mode)
26
Product Description

1.7.3 Diskette Drive Controller

The I/O controller supports one diskette drive that is compatible with the 82077 diskette drive controller and supports both PC-AT and PS/2 modes.
For information about Refer to
The location of the diskette drive connector Figure 11, page 59 The signal names of the diskette drive connector Table 42, page 64 The supported diskette drive capacities and sizes Table 68, page 100

1.7.4 Keyboard and Mouse Interface

PS/2 keyboard and mouse connectors are located on the back panel. The +5 V lines to these
connectors are protected with a PolySwitch connection after an overcurrent condition is removed.
NOTE
The keyboard is supported in the bottom PS/2 connector and the mouse is supported in the top PS/2 connector. Power to the computer should be turned off before a keyboard or mouse is connected or disconnected.
circuit that, like a self-healing fuse, reestablishes the
The keyboard controller contains the AMI keyboard and mouse controller code, provides the keyboard and mouse control functions, and supports password protection for power-on/reset. A power-on/reset password can be specified in the BIOS Setup program.
For information about Refer to
The location of the keyboard and mouse connectors Figure 8, page 50 The signal names of the keyboard and mouse connectors Table 17, page 51
27
Intel Desktop Board D850GB Technical Product Specification

1.8 Audio Subsystem (Optional)

CAUTION
The pins on both the legacy-style 2-mm and the ATAPI CD-ROM connectors are wired to the same inputs on the audio mixer. Do not attach CD-ROM drives to both connectors, otherwise, the board or drives could be damaged.
The audio subsystem includes these features:
Split digital/analog architecture for improved S/N (signal-to-noise) ratio: 85 dB
Power management support for APM 1.2 and ACPI 1.0 (driver dependant)
3-D stereo enhancement
Even though all connectors may not appear on all boards, the audio subsystem supports the following audio interfaces:
CD-ROM (legacy-style 2-mm connector)
ATAPI-style connectors: CD-ROM Auxiliary line in
Back panel audio connectors: Line out Line in Mic in
The audio subsystem consists of the following devices:
Intel 82801BA I/O Controller Hub (ICH2)
Analog Devices AD1881/AD1885 analog codec
Figure 4 is a block diagram of the audio subsystem.
82801BA
I/O Controller Hub
(ICH2)
Figure 4. Audio Subsystem Block Diagram
For information about Refer to
The back panel audio connectors Section 2.8.1, page 50
AC ’97
Link
Analog Devices
AD1881/AD1885
Analog Codec
CD-ROM
Line In
Audio In
Mic In
Line Out
OM11733
28
Product Description

1.8.1 Audio Connectors

1.8.1.1 CD-ROM (Legacy-style 2-mm) Audio Connector (Optional)
A 1 x 4-pin legacy-style 2-mm connector connects an internal CD-ROM drive to the audio mixer.
For information about Refer to
The location of the legacy-style 2-mm connector Figure 9, page 54 The signal names of the legacy-style 2-mm connector Table 38, page 57
1.8.1.2 ATAPI CD-ROM Audio Connector (Optional)
A 1 x 4-pin ATAPI-style connector connects an internal ATAPI CD-ROM drive to the audio mixer.
For information about Refer to
The location of the ATAPI CD-ROM connector Figure 9, page 54 The signal names of the ATAPI CD-ROM connector Table 26, page 55
1.8.1.3 Auxiliary Line In Connector (Optional)
A 1 x 4-pin ATAPI-style connector connects the left and right channel signals of an internal audio device to the audio subsystem.
For information about Refer to
The location of the auxiliary line in connector Figure 9, page 54 The signal names of the auxiliary line in connector Table 25, page 55

1.8.2 Audio Subsystem Software

Audio software and drivers are available from Intel’s World Wide Web site.
For information about Refer to
Obtaining audio software and drivers Section 1.2, page 16
29
Intel Desktop Board D850GB Technical Product Specification

1.9 LAN Subsystem

The Network Interface Controller subsystem consists of the ICH2 (with integrated LAN Media Access Controller) and a physical layer interface device. Features of the LAN subsystem include:
PCI Bus Master interface
CSMA/CD Protocol Engine
Serial CSMA/CD unit interface that supports the following physical layer interface devices: 82562EM onboard LAN 82562ET/EM (10/100 Mbit/sec Ethernet) on CNR bus
82562EH (1 Mbit/sec HomePNA
PCI Power Management Supports APM Supports ACPI technology Supports Wake up from suspend state (Wake on LAN

1.9.1 Intel® 82562EM Platform LAN Connect Device (Optional)

) on CNR bus
technology)
The Intel 82562EM component provides an interface to the back panel RJ-45 connector with integrated LEDs. This physical interface may alternately be provided through the CNR connector.
The Intel 82562EM provides the following functions:
Basic 10/100 Ethernet LAN connectivity
Supports RJ-45 connector with status indicator LEDs on the back panel
Full device driver compatibility
Advanced Power Management and ACPI support
Programmable transit threshold
Configuration EEPROM that contains the MAC address
Remote monitoring (alerting)

1.9.2 RJ-45 LAN Connector with Integrated LEDs (Optional)

Two LEDs are built into the RJ-45 LAN connector. Table 6 describes the LED states when the board is powered up and the LAN subsystem is operating.
Table 6. LAN Connector LED States
LED Color LED State Condition
Off 10 Mbit/sec data rate is selected. Green On 100 Mbit/sec data rate is selected.
Yellow
Off LAN link is not established. On (steady state) LAN link is established. On (brighter and pulsing) The computer is communicating with another computer on
the LAN.
30
Product Description

1.9.3 LAN Subsystem Software

LAN software and drivers are available from Intel’s World Wide Web site.
For information about Refer to
Obtaining LAN software and drivers Section 1.2, page 16

1.10 CNR (Optional)

The CNR connector provides an interface that supports the audio, modem, USB, and LAN interfaces of the Intel 850 chipset. Figure 5 shows the signal interface between the riser and the ICH2.
Intel 82801BA
I/O Controller Hub
(ICH2)
Figure 5. ICH2 and CNR Signal Interface
AC ’97 Interface
LAN Interfaces
SMBus
USB
Power
Communication and
Networking Riser
(Up to two AC ’97 codecs
and one LAN device)
CNR Connector
OM10412
The interfaces supported by the CNR include the following:
AC ’97 interface: supports audio and/or modem functions on the CNR board.
LAN interfaces: provides one of two LAN interfaces for networking functions. Interfaces
include an eight-pin interface for use with Platform LAN Connection (PLC) based devices, and a 17-pin interface for Media Independent Interface (MII) based devices (commonly referred to as a PHY).
SMBus interface: provides Plug-and-Play functionality for the CNR board.
USB interface: provides a USB interface for the CNR board.
The CNR connector includes power signals required for power management and for CNR board operation. To learn more about the CNR, refer to the CNR specification.
NOTE
If you install a CNR card with an audio codec that cannot support a mutilchannel audio upgrade, the D850GB board’s integrated audio codec will be disabled. This only applies to D850GB boards that have both the onboard audio subystem and a CNR.
For information about Refer to
Obtaining the CNR specification Section 1.3, page 16
31
Intel Desktop Board D850GB Technical Product Specification

1.11 Hardware Management Subsystem

The hardware management features enable the board to be compatible with the Wired for Management (WfM) specification. The board has several hardware management features, including the following:
Fan control and monitoring
Thermal and voltage monitoring
For information about Refer to
The WfM specification Table 3, page 16

1.11.1 Hardware Monitor Component

The hardware monitor component provides low-cost instrumentation capabilities. The features of the component include:
Internal ambient temperature sensing
Remote thermal diode sensing for direct monitoring of processor temperature
Power supply monitoring (+5 V, +3.3 V, +2.5 V, 3.3 VSB, Vccp) to detect levels above or
below acceptable values
SMBus interface

1.11.2 Fan Control and Monitoring

The SMSC LPC47M102 I/O controller provides one fan tachometer input. The enhanced thermal monitor and fan control device provides two fan sense inputs and two fan control outputs. Monitoring and control can be implemented using third-party software.
For information about Refer to
The functions of the fan connectors Section 1.12.2.2, page 38 The location of the fan connectors Figure 10, page 56 The signal names of the fan connectors Section 2.8.2.2, page 54
32

1.12 Power Management

Power management is implemented at several levels, including:
Software support: Advanced Power Management (APM) Advanced Configuration and Power Interface (ACPI)
Hardware support: Power connector Fan connectors Wake on LAN technology Instantly Available technology Resume on Ring Wake from USB Wake from PS/2 keyboard PME# wakeup support
Product Description

1.12.1 Software Support

The software support for power management includes:
APM
ACPI
If an ACPI-aware operating system is used, the BIOS can provide ACPI support. Otherwise, it defaults to APM support.
1.12.1.1 APM
APM makes it possible for the computer to enter an energy-saving standby mode. The standby mode can be initiated in the following ways:
Time-out period specified in the BIOS Setup program
From the operating system, such as the Standby menu item in Windows
In standby mode, the D850GB board can reduce power consumption by spinning down hard drives, and reducing power to, or turning off of, VESA
DPMS-compliant monitors. Power
management mode can be enabled or disabled in the BIOS Setup program. While in standby mode, the system retains the ability to respond to external interrupts and service
requests, such as incoming faxes or network messages. Any keyboard or mouse activity brings the system out of standby mode and immediately restores power to the monitor.
98
33
Intel Desktop Board D850GB Technical Product Specification
The BIOS enables APM by default, but the operating system must support an APM driver for the power management features to work. For example, Windows 98 supports the power management features upon detecting that APM is enabled in the BIOS.
For information about Refer to
Enabling or disabling power management in the BIOS Setup program Table 72, page 104 The D850GB board’s compliance level with APM Table 3, page 16
1.12.1.2 ACPI
ACPI gives the operating system direct control over the power management and Plug and Play functions of a computer. The use of ACPI with the D850GB board requires an operating system that provides full ACPI support. ACPI features include:
Plug and Play (including bus and device enumeration) and APM support (normally contained in the BIOS)
Power management control of individual devices, add-in boards (some add-in boards may require an ACPI-aware driver), video displays, and hard disk drives
Methods for achieving less than 15-watt system operation in the power-on/standby sleeping state
A Soft-off feature that enables the operating system to power-off the computer
Support for multiple wake up events (see Table 9 on page 36)
Support for a front panel power and sleep mode switch. Table 7 lists the system states based
on how long the power switch is pressed, depending on how ACPI is configured with an ACPI-aware operating system.
Table 7. Effects of Pressing the Power Switch
If the system is in this state…
Off (ACPI G2/G5 – Soft off)
On (ACPI G0 – working state)
On (ACPI G0 – working state)
Sleep (ACPI G1 – sleeping state)
Sleep (ACPI G1 – sleeping state)
…and the power switch is pressed for
Less than four seconds Power-on
Less than four seconds Soft-off/Standby
More than four seconds Fail safe power-off
Less than four seconds Wake up
More than four seconds Power-off
…the system enters this state
(ACPI G0 – working state)
(ACPI G1 – sleeping state)
(ACPI G2/G5 – Soft off)
(ACPI G0 – working state)
(ACPI G2/G5 – Soft off)
For information about Refer to
The D850GB board’s compliance level with ACPI Section 1.3, page 16
34
Product Description
1.12.1.2.1 System States and Power States
Under ACPI, the operating system directs all system and device power state transitions. The operating system puts devices in and out of low-power states based on user preferences and knowledge of how devices are being used by applications. Devices that are not being used can be turned off. The operating system uses information from applications and user settings to put the system as a whole into a low-power state.
Table 8 lists the power states supported by the D850GB board along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states.
Table 8. Power States and Targeted System Power
Global States Sleeping States
G0 – working state
G1 – sleeping state
G1 – sleeping state
G1 – sleeping state
G2/S5 S5 – Soft off.
G3 – mechanical off
AC power is disconnected from the computer.
Notes:
1. Total system power is dependent on the system configuration, including add-in boards and peripherals powered by the system chassis’ power supply.
2. Dependent on the standby power consumpt i on of wake-up devices used in the system.
S0 – working C0 – working D0 – working
S1 – Processor stopped
S3 – Suspend to RAM. Context saved to RAM.
S4 – Suspend to disk. Context saved to di sk.
Context not saved. Cold boot is required.
No power to the system.
Processor States
C1 – stop grant
No power D3 – no power
No power D3 – no power
No power D3 – no power
No power D3 – no power for
Device States
state. D1, D2, D3 –
device specification specific.
except for wake up logic.
except for wake up logic.
except for wake up logic.
wake up logic, except when provided by battery or external source.
Targeted System
(Note 1)
Power
Full power > 30 W
5 W < power < 52.5 W
Power < 5 W
Power < 5 W
Power < 5 W
No power to t he system so that service can be performed.
(Note 2)
(Note 2)
(Note 2)
35
Intel Desktop Board D850GB Technical Product Specification
1.12.1.2.2 Wake Up Devices and Events
Table 9 lists the devices or specific events that can wake the computer from specific states.
Table 9. Wake Up Devices and Events
These devices/events can wake up the computer… …from this state
Power switch S1, S3, S4, S5 RTC alarm S1, S3, S4, S5 LAN S1, S3, S4, S5 CNR S1, S3 , S4, S5 PME# S1, S3, S4, S5 Modem (back panel Serial Port A) S1, S3 IR command S1, S3 USB S1, S3 PS/2 keyboard S1, S3
Note: For LAN and PM E #, S5 is disabled by default in the BIOS S et up program. Setting this option to Power On will
enable a wake-up event from LAN in the S 5 state.
(Note)
NOTE
The use of these wake up events from an ACPI state requires a properly configured operating system that provides full ACPI support. In addition, software, drivers, and peripherals must fully support ACPI wake events.
1.12.1.2.3 Plug and Play
In addition to power management, ACPI provides control information so that operating systems can facilitate Plug and Play. ACPI is used only to configure devices that do not use other hardware configuration standards. PCI devices for example, are not configured by ACPI.
36
Product Description

1.12.2 Hardware Support

CAUTION
Ensure that the power supply provides adequate +5 V standby current if the Wake on LAN and Instantly Available technology features are used. Failure to do so can damage the power supply. The total amount of standby current required depends on the wake devices supported and manufacturing options. Refer to Section 2.11.3 on page 73 for additional information.
The D850GB board provides several power management hardware features, including:
Power connector
Fan connectors
Wake on LAN technology
Instantly Available technology
Resume on Ring
Wake from USB
Wake from PS/2 keyboard
PME# wakeup support
Wake on LAN technology and Instantly Available technology require power from the +5 V standby line. The sections discussing these features describe the incremental standby power requirements for each.
Resume on Ring enables telephony devices to access the computer when it is in a power-managed state. The method used depends on the type of telephony device (external or internal) and the power management mode being used (APM or ACPI).
NOTE
The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an operating system that provides full ACPI support.
1.12.2.1 Power Connector
When used with an ATX12V-compliant power supply that supports remote power on/off, the D850GB board can turn off the system power through software control. To enable soft-off control in software, advanced power management must be enabled in the BIOS Setup program and in the operating system. When the system BIOS receives the correct APM command from the operating system, the BIOS turns off power to the computer.
With soft-off enabled, if power to the computer is interrupted by a power outage or a disconnected power cord, when power resumes, the computer returns to the power state it was in before power
was interrupted (on or off). The computer’s response can be set using the After Power Failure feature in the BIOS Setup program’s Boot menu.
37
Intel Desktop Board D850GB Technical Product Specification
For information about Refer to
The location of the power connector Figure 10, page 56 The signal names of the power connector Table 33, page 58
The BIOS Setup program’s Boot menu Table 73, page 105 The ATX specification Section 1.3, page 16
1.12.2.2 Fan Connectors
The D850GB board has two fan connectors with thermal control signals (fan 1 at location J10A2 and fan 2 at location J7M2) that are used to switch the fans on and off or adjust the fan speed as determined by the thermal sensors.
The ambient temperature of a D850GB-based system is thermally monitored by separate temperature sensors that control voltage to the fan 1 and fan 2 connectors. If the fans attached to these connectors provide a tachometer signal, the sensor reports the fan speed to the hardware monitor component.
The temperature sensors that control the fans are initialized by the BIOS at power-up to turn on only when the sensor reaches 36 cool down to 31
o
C (87.8 oF). This prevents the fans from turning off and on when the ambient air
around the sensor fluctuates around 35-36
slowly because the fan’s duty cycle starts at 70% and rises to 100% when the sensor reaches 46 (114.8
o
F).
o
C (96.8 oF). The fans switch off when their respective sensors
o
C. When the fans switch on, they may appear to rotate
o
C
All fans (fan 1, fan 2, fan 3, and fan 4) and the thermal control circuits are off during ACPI S3, S4, and S5 states. Fan 3 and fan 4 (and the associated thermal control fan circuits) are enabled during ACPI S0 and S1 states. Table 10 summarizes the functions of the four fan connectors.
Table 10. Fan Connector Descriptions
Connector Function
Chassis fan (fan 1) Provides +12 V DC for the syste m or chassis fan. A tachometer feedback
connection is also provided. A fan attached to this connector can be monitored and controlled by the enhanced thermal monitor and fan control device.
RIMM fan (fan 2) Provides +12 V DC for the fan to cool the RIMM modules. A tachometer feedback
connection is also provided. A fan attached to this connector can be monitored and controlled by the enhanced thermal monitor and fan control device.
Processor fan (fan 3) Provides +12 V DC for the processor fan or active fan heatsink. This fan is on in
the S0 or S1 state and is off only when the system is off or in the S3 or S5 state. There are no user controls, however, this fan connector is wired to the fan tachometer input of the SMSC LPC47M102 I/O controller.
Processor voltage regulator fan (fan 4)
Provides +12 V DC for the fan to cool the processor voltage regulator area. This fan is on in the S0 or S1 state and is off only when the system is off or in the S3 or S5 state. There are no user controls.
38
Product Description
For information about Refer to
The location of the fan connectors Figure 10, page 56 The signal names of the fan connectors Section 2.8.2.2, page 54
1.12.2.3 Wake on LAN Technology
CAUTION
For Wake on LAN technology, the 5-V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to provide adequate standby current when implementing Wake on LAN technology can damage the power supply. Refer to Section 2.11.3 on page 73 for additional information.
Wake on LAN technology enables remote wakeup of the computer through a network. The LAN subsystem PCI bus network adapter monitors network traffic at the Media Independent Interface.
Upon detecting a Magic Packet the computer. Depending on the LAN implementation, the D850GB board supports Wake on LAN technology in the following ways:
With APM, through the Wake on LAN technology connector
With ACPI, through the PCI bus PME# signal for PCI 2.2 compliant LAN designs through the onboard LAN subsystem through a CNR-based LAN subsystem
frame, the LAN subsystem asserts a wakeup signal that powers up
The Wake on LAN technology connector can be used with PCI bus network interface cards that have a remote wake up connector, as shown in Figure 6. Network interface cards that are PCI 2.2 compliant assert the wakeup signal through the PCI bus signal PME# (pin A19 on the PCI bus connectors).
Network Interface Card
Figure 6. Using the Wake on LAN Technology Connector
For information about Refer to
The location of the Wake on LAN technology connector Figure 10, page 56 The signal names of the Wake on LAN technology connector Table 36, page 58
Connector
PCI Slot
Remote
Wake Up
Desktop Board
Wake on
LAN
Technology
Connector
OM10731
39
Intel Desktop Board D850GB Technical Product Specification
1.12.2.4 Instantly Available Technology
CAUTION
For Instantly Available technology, the 5-V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to provide adequate standby current when implementing Instantly Available technology can damage the power supply. Refer to Section 2.11.3 on page 73 for additional information.
Instantly Available technology enables the D850GB board to enter the ACPI S3 (Suspend-to­RAM) sleep-state. While in the S3 sleep-state, the computer will appear to be off (the power supply is off, and the front panel LED is amber if dual-color, or off if single-color.) When signaled by a wake-up device or event, the system quickly returns to its last known wake state. Table 9 on page 36 lists the devices and events that can wake the computer from the S3 state.
The D850GB board supports the PCI Bus Power Management Interface Specification. For information on the versions of this specification, see Section 1.3. Add-in boards that also support this specification can participate in power management and can be used to wake the computer.
The use of Instantly Available technology requires operating system support and PCI 2.2 compliant add-in cards and drivers.
The standby power indicator LED shows that power is still present at the RIMM, PCI bus, AGP, and CNR connectors, even when the computer appears to be off. Figure 7 shows the location of the standby power indicator LED.
CR6F1
OM10442
Figure 7. Location of the Standby Power Indicator LED
40
1.12.2.5 Resume on Ring
The operation of Resume on Ring can be summarized as follows:
Resumes operation from either the APM sleep mode or the ACPI S1 or S3 states
Requires only one call to access the computer
Detects incoming call similarly for external and internal modems
Requires modem interrupt be unmasked for correct operation
1.12.2.6 Wake from USB
USB bus activity wakes the computer from an ACPI S1 or S3 state.
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB.
1.12.2.7 Wake from PS/2 Keyboard
PS/2 keyboard activity wakes the computer from an ACPI S1 or S3 state.
Product Description
1.12.2.8 PME# Wakeup Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1, S3, S4, or S5 state (with BIOS support).
1.12.2.9 Wake on LAN (Legacy)
This provision allows legacy internal LAN cards that require separate internal board connection to support Wake on LAN technology. (More recent PCI LAN cards use the PME# signal available at the PCI connector for this purpose.)
When a Wake on LAN technology supporting LAN card is connected to the Wake on LAN connector, LAN activity wakes the computer from the APM sleep mode, or the ACPI S1, S3, S4, or S5 states.
41
Intel Desktop Board D850GB Technical Product Specification
42

2 Technical Reference

What This Chapter Contains
2.1 Introduction.................................................................................................................43
2.2 Memory Map ..............................................................................................................43
2.3 I/O Map ......................................................................................................................44
2.4 DMA Channels ...........................................................................................................46
2.5 PCI Configuration Space Map....................................................................................46
2.6 Interrupts....................................................................................................................47
2.7 PCI Interrupt Routing Map..........................................................................................47
2.8 Connectors.................................................................................................................49
2.9 Jumper Blocks............................................................................................................68
2.10 Mechanical Considerations.........................................................................................70
2.11 Electrical Considerations............................................................................................72
2.12 Thermal Considerations..............................................................................................75
2.13 Reliability....................................................................................................................76
2.14 Environmental ............................................................................................................77
2.15 Regulatory Compliance..............................................................................................78

2.1 Introduction

Sections 2.2 - 2.6 contain several standalone tables. Table 11 describes the system memory map, Table 12 shows the I/O map, Table 13 lists the DMA channels, Table 14 defines the PCI configuration space map, and Table 15 describes the interrupts. The remaining sections in this chapter are introduced by text found with their respective section headings.

2.2 Memory Map

Table 11. System Memory Map
Address Range (decimal) Address Range (hex) Size Description
1024 K - 2097152 K 100000 - 7FFFFFFF 2047 MB Extended memory 960 K - 1024 K F0000 - FFFFF 64 KB Runtime BIOS 896 K - 960 K E0000 - EFFFF 64 KB Reserved 800 K - 896 K C8000 - DFFFF 96 KB Available high DOS memory (open
to the PCI bus) 640 K - 800 K A0000 - C7FFF 160 KB Video memory and BIOS 639 K - 640 K 9FC00 - 9FFFF 1 KB Extended BIOS data (movable by
memory manager software) 512 K - 639 K 80000 - 9FBFF 127 KB Extended conventional memory 0 K - 512 K 00000 - 7FFFF 512 KB Conventional memory
43
Intel Desktop Board D850GB Technical Product Specification

2.3 I/O Map

Table 12. I/O Map
Address (hex) Size Description
0000 - 000F 16 bytes DMA controller 0020 - 0021 2 bytes Programmable Interrupt Control (PIC) 0040 - 0043 4 bytes System timer 0060 1 byte Keyboard controller byte—reset IRQ
0061 1 byte System speaker 0064 1 byte Keyboard controller, CMD / STAT byte 0070 - 0071 2 bytes System CMOS / Real Time Clock 0072 - 0073 2 bytes System CMOS 0080 - 008F 16 bytes DMA controller 0092 1 byte Fast A20 and PIC 00A0 - 00A1 2 bytes PIC 00B2 - 00B3 2 bytes APM control 00C0 - 00DF 32 bytes DMA 00F0 1 byte Numeric data processor 0170 - 0177 8 bytes Secondary IDE channel 01F0 - 01F7 8 bytes Primary IDE channel
One of these ranges: 0220 - 022F 0240 - 024F
0228 - 022F* 8 bytes LPT3
0278 - 027F* 8 bytes LPT2 02E8 - 02EF* 8 bytes COM4 / video (8514A) 02F8 - 02FF* 8 bytes COM2 0376 1 byte Secondary IDE channel command port 0377, bits 6:0 7 bits Secondary IDE channel status port 0378 - 037F 8 bytes LPT1 03B0 - 03BB 12 bytes Intel 82850 MCH 03C0 - 03DF 32 bytes Intel 82850 MCH 03E8 - 03EF 8 bytes COM3 03F0 - 03F5 6 bytes Diskette channel 1 03F6 1 byte Primary IDE channel command port 03F8 - 03FF 8 bytes COM1
04D0 - 04D1 2 bytes Edge / level triggered PIC
LPTn + 400 8 bytes ECP port, LPTn base address + 400h 0CF8 - 0CFB** 4 bytes PCI configuration address register 0CF9*** 1 byte Turbo and reset control register 0CFC - 0CFF 4 bytes PCI configuration data register FFA0 - FFA7 8 bytes Primary bus master IDE registers FFA8 - FFAF 8 bytes Secondary bus master IDE registers
16 bytes Audio (Sound Blaster Pro
-compatible)
continued
44
Table 12. I/O Map (continued)
Address (hex) Description
96 contiguous bytes starting on a 128-byte divisible boundary
64 contiguous bytes starting on a 64-byte divisible boundary
64 contiguous bytes starting on a 64-byte divisible boundary
32 contiguous bytes starting on a 32-byte divisible boundary
16 contiguous bytes starting on a 16-byte divisible boundary
4096 contiguous bytes starting on a 4096-byte divisible boundary
256 contiguous bytes starting on a 256-byte divisible boundary
64 contiguous bytes starting on a 64-byte divisible boundary
256 contiguous bytes starting on a 256-byte divisible boundary
32 contiguous bytes starting on a 32-byte divisible boundary
96 contiguous bytes starting on a 128-byte divisible boundary
* Default, but can be changed to another address range. ** Dword access only.
*** Byte access only.
ICH2 (ACPI + TCO)
D850GB board resource
Onboard audio controller
ICH2 (USB controller #1)
ICH2 (SMBus)
Intel 82801BA PCI bridge
ICH2 audio mixer
ICH2 audio bus mixer
ICH2 modem mixer
ICH2 (USB controller #2)
LPC47M102
Technical Reference
NOTE
Some additional I/O addresses are not available due to ICH2 address aliassing.
For information about Refer to
ICH2 addressing Section 1.2 on page 16
45
Intel Desktop Board D850GB Technical Product Specification

2.4 DMA Channels

Table 13. DMA Channels
DMA Channel Number Data Width System Resource
0 8 or 16 bits Audio 1 8 or 16 bits Audio / parallel port 2 8 or 16 bits Diskette drive 3 8 or 16-bits Parallel port (for ECP or EPP) / audio 4 8 or 16 bits DMA controller 5 16 bits Open 6 16 bits Open 7 16 bits Open

2.5 PCI Configuration Space Map

Table 14. PCI Configuration Space Map
Bus Number (hex)
00 00 00 Memory controller of Intel 82850 component 00 01 00 PCI to AGP bridge 00 1E 00 Hub link to PCI bridge 00 1F 00 Intel 82801BA ICH2 PCI to LPC bridge 00 1F 01 IDE controller 00 1F 02 USB 00 1F 03 SMBus controller 00 1F 04 USB 00 1F 05 AC ’97 audio controller (optional)
00 1F 06 AC ’97 modem controller (optional) 01 00 00 Add-in AGP adapter card 02 08 00 LAN controller (optional) 02 09 00 PCI bus connector 1 (J4E1) 02 0A 00 PCI bus connector 2 (J4D1) 02 0B 00 PCI bus connector 3 (J4C1) 02 0C 00 PCI bus connector 4 (J4B1) 02 0D 00 PCI bus connector 5 (J4A1)
Device Number (hex)
Function Number (hex) Description
46

2.6 Interrupts

Table 15. Interrupts
IRQ System Resource
NMI I/O channel check 0 Reserved, interval timer 1 Reserved, keyboard buffer full 2 Reserved, cascade interrupt from slave PIC 3 COM2 4 COM1 5 LPT2 (Plug and Play option) / Audio / User available 6 Diskette drive 7 LPT1 8 Real-time clock 9 Reserved for ICH2 system management bus 10 User available 11 User available 12 Onboard mouse port (if present, else user available) 13 Reserved, math coprocessor 14 Primary IDE (if present, else user available) 15 Secondary IDE (if present, else user available)
Note: Default, but can be changed to another IRQ.
(Note) (Note)
(Note)
Technical Reference

2.7 PCI Interrupt Routing Map

This section describes interrupt sharing and how the interrupt signals are connected between the PCI bus connectors and onboard PCI devices. The PCI specification specifies how interrupts can be shared between devices attached to the PCI bus. In most cases, the small amount of latency added by interrupt sharing does not affect the operation or throughput of the devices. In some special cases where maximum performance is needed from a device, a PCI device should not share an interrupt with other PCI devices. Use the following information to avoid sharing an interrupt with a PCI add-in card.
PCI devices are categorized as follows to specify their interrupt grouping:
INTA: By default, all add-in cards that require only one interrupt are in this category. For
almost all cards that require more than one interrupt, the first interrupt on the card is also classified as INTA.
INTB: Generally, the second interrupt on add-in cards that require two or more interrupts is
classified as INTB. (This is not an absolute requirement.)
INTC and INTD: Generally, a third interrupt on add-in cards is classified as INTC and a
fourth interrupt is classified as INTD.
47
Intel Desktop Board D850GB Technical Product Specification
The ICH2 has eight programmable interrupt request (PIRQ) input signals. All PCI interrupt sources either onboard or from a PCI add-in card connect to one of these PIRQ signals. Some PCI interrupt sources are electrically tied together on the D850GB board and therefore share the same interrupt. Table 16 shows an example of how the PIRQ signals are routed on the D850GB board.
For example, using Table 16 as a reference, assume an add-in card using INTA is plugged into PCI bus connector 4. In PCI bus connector 4, INTA is connected to PIRQB, which is already connected to the SMBus. The add-in card in PCI bus connector 4 now shares interrupts with these onboard interrupt sources.
Table 16. PCI Interrupt Routing Map
PCI Interrupt Source
AGP connector INTB INTA to PIRQA ICH2 USB controller INTD to PIRQD SMBus controller INTB ICH2 USB controller INTC to PIRQC ICH2 Audio / Modem INTB ICH2 LAN INTA to PIRQE PCI Bus Connector 1 (J4E1) INTA INTB INTC INTD PCI Bus Connector 2 (J4D1) INTD INTA INTB INTC PCI Bus Connector 3 (J4C1) INTC INTD INTA INTB PCI Bus Connector 4 (J4B1) INTB INTC INTD INTA PCI Bus Connector 5 (J4A1) INTA INTB INTC INTD
PIRQF PIRQG PIRQH PIRQB Other
ICH2 PIRQ Signal Name
NOTE
The ICH2 can connect each PIRQ line internally to one of the IRQ signals (3, 4, 5, 6, 7, 9, 10, 11, 12, 14, and 15). Typically, a device that does not share a PIRQ line will have a unique interrupt. However, in certain interrupt-constrained situations, it is possible for two or more of the PIRQ lines to be connected to the same IRQ signal.
48
Technical Reference

2.8 Connectors

CAUTION
Only the back panel connectors of the D850GB board have overcurrent protection. The D850GB
board’s internal connectors are not overcurrent protected and should connect only to devices inside the computer’s chassis, such as fans and internal peripherals. Do not use these connectors to power devices external to the computer’s chassis. A fault in the load presented by the external devices could cause damage to the computer, the interconnecting cable, and the external devices themselves.
This section describes the board’s connectors. The connectors can be divided into the following groups:
Back panel I/O connectors (see page 50) PS/2 keyboard and mouse USB (two) Parallel port Serial port LAN Audio (Line out, Line in, and Mic in)
Internal I/O connectors (see page 53) Audio (ATAPI CD-ROM, legacy-style CD-ROM, and auxiliary line input) Fans (four) Power (three) Wake on LAN technology Wake on Ring Add-in boards (one CNR connector, one AGP connector, and five PCI bus connectors) IDE (two) Diskette drive SCSI LED
External I/O connectors (see page 65) Front panel USB Front panel (power/sleep/message-waiting LED, power switch, hard drive activity LED,
reset switch, infrared port, and auxiliary front panel power LED)
49
Intel Desktop Board D850GB Technical Product Specification

2.8.1 Back Panel Connectors

Figure 8 shows the location of the back panel connectors. The back panel connectors are color­coded in compliance with PC 99 recommendations. The figure legend below lists the colors used.
A
C
E
H
I
J
B
D
Item Description Color For more information see:
A PS/2 mouse port Green Table 17 B PS/2 keyboard port Purple Table 17 C USB port 0 Black Table 18 D USB port 1 Black Table 18 E Parallel port Burgundy Table 19 F Serial port Teal Table 20 G LAN (optional) Black Table 21 H Audio line in (optional) Light blue Table 22 I Audio line out (optional) Lime green Table 23 J Mic in (optional) Pink Table 24
F
G
OM10443
Figure 8. Back Panel Connectors
NOTE
The back panel audio line out connector is designed to power headphones or amplified speakers only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output.
50
Table 17. PS/2 Mouse/Keyboard Connector
Pin Signal Name
1 Data 2 Not connected 3 Ground 4 +5 V 5 Clock 6 Not connected
Table 18. USB Connectors
Pin Signal Name
1 +5 V 2 USBP0# [USBP1#] 3 USBP0 [USBP1] 4 Ground
Signal names in brackets ([ ]) are for USB port 1.
Technical Reference
Table 19. Parallel Port Connector
Pin Standard Signal Name ECP Signal Name EPP Signal Name
1 STROBE# STROBE# WRITE# 2 PD0 PD0 PD0 3 PD1 PD1 PD1 4 PD2 PD2 PD2 5 PD3 PD3 PD3 6 PD4 PD4 PD4 7 PD5 PD5 PD5 8 PD6 PD6 PD6 9 PD7 PD7 PD7 10 ACK# ACK# INTR 11 BUSY BUSY#, PERIPHACK WAIT# 12 PERROR PE, ACKREVERSE# PE 13 SELECT SELECT SELECT 14 AUDOFD# AUDOFD#, HOSTACK DATASTB# 15 FAULT# FAULT#, PERIPHREQST# FAULT# 16 INIT# INIT#, REVERSERQST# RESET# 17 SLCTIN# SLCTIN# ADDRSTB# 18 25 Ground Ground Ground
51
Intel Desktop Board D850GB Technical Product Specification
Table 20. Serial Port Connector
Pin Signal Name
1 DCD (Data Carrier Detect) 2 RXD# (Receive Data) 3 TXD# (Transmit Data) 4 DTR (Data Terminal Ready) 5 Ground 6 DSR (Data Set Ready) 7 RTS (Request to Send) 8 CTS (Clear to Send) 9 RI (Ring Indicator)
Table 21. LAN Connector (optional)
Pin Signal Name
1 TX+ 2 TX­3 RX+ 4 Ground 5 Ground 6 RX­7 Ground 8 Ground
Table 22. Audio Line In Connector (optional)
Pin Signal Name
Tip Audio left in Ring Audio right in Sleeve Ground
Table 23. Audio Line Out Connector (optional)
Pin Signal Name
Tip Audio left out Ring Audio right out Sleeve Ground
Table 24. Mic In Connector (optional)
Pin Signal Name
Tip Mono in Ring Mic bias voltage Sleeve Ground
52

2.8.2 Internal I/O Connectors

The internal I/O connectors are divided into the following functional groups:
Audio (see page 54) Auxiliary line in (optional) ATAPI CD-ROM (optional) Legacy style (2-mm) CD-ROM (optional) PC/PCI
Power and hardware control (see page 56) Fans (four) ATX12V Main power Auxiliary power Wake on LAN technology Wake on ring connector
Add-in boards and peripheral interfaces (see page 59) CNR (communication and networking riser) PCI bus (five) AGP IDE (two) SCSI LED Diskette drive
Technical Reference
2.8.2.1 Expansion Slots
The board has the following expansion slots:
One AGP connector or an optional AGP Pro50 connector at location J5E1 (ATX expansion slot 6). The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy 3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V AGP cards.
Five PCI local bus slots (compliant with PCI rev 2.2 specification). The SMBus is routed to PCI bus connector 2 only at location J4D1 (ATX expansion slot 4). PCI add-in cards with SMBus support can access sensor data and other information residing on the desktop board.
One CNR (optional), shared with PCI bus connector 5 at location J4A1 (ATX expansion slot 1).
NOTE
This document references back-panel slot numbering with respect to processor location on the board. The AGP slot is not numbered. PCI slots are identified as PCI slot #x, starting with the slot closest to the processor. The CNR slot shares PCI slot 5. The ATX/MicroATX specifications identify expansion slot locations with respect to the far edge of a full-sized ATX chassis. The ATX
specification and the board’s silkscreen are opposite and could cause confusion. The ATX numbering convention is made without respect to slot type (PCI vs. AGP), but refers to an actual slot location on a chassis. Figure 11 on page 59 illustrates the board’s PCI slot numbering.
53
Intel Desktop Board D850GB Technical Product Specification
2.8.2.2 Audio Connectors
Figure 9 shows the location of the audio connectors.
A DB
1
C
1
1
1
65
OM10444
Item Description Color Reference Designator For more information see:
A Auxiliary line in, ATAPI style
White J2C1 Table 25
(Optional) B ATAPI CD-ROM (Optional) Black J2D1 Table 26 C CD-ROM, Legacy style, 2 mm
White J2D2 Table 27
(Optional) D PC/PCI N/A J6D1 Table 28
Figure 9. Audio Connectors
54
Table 25. Optional Auxiliary Line In Connector (J2C1)
Pin Signal Name
1 Left auxiliary line in 2 Ground 3 Ground 4 Right auxiliary line in
Table 26. Optional ATAPI CD-ROM Connector (J2D1)
Pin Signal Name
1 Left audio input from CD-ROM 2 CD audio differential ground 3 CD audio differential ground 4 Right audio input from CD-ROM
Table 27. Optional CD-ROM Legacy Style
Connector (J2D2)
Pin Signal Name
1 CD_Ground 2 CD_IN-Left 3 CD_Ground 4 CD_IN-Right
Technical Reference
Table 28. PC/PCI Connector (J6D1)
Pin Signal Name Pin Signal Name
1 P_PCIGNTA# 2 Ground 3 Key (no pin) 4 P_PCIREQA# 5 Ground 6 SER_IRQ
55
Intel Desktop Board D850GB Technical Product Specification
2.8.2.3 Power and Hardware Control Connectors
Figure 10 shows the location of the power and hardware control connectors.
A
21
4
3
1
1
B
1
1
1
1
1
F
20 10
EGHDCI
11 1
OM10445
Item Description Reference Designator For more information see:
A ATX12V power connector J3H1 Table 29 B Processor voltage regulator fan (Fan 4) J3M1 Table 30 C RIMM fan (Fan 2) J7M2 Table 31 D Processor fan (Fan 3) J6L1 Table 32 E Main power J10K1 Table 33 F Auxiliary power J9J1 Table 34 G Wake on Ring J8C1 Table 35 H Wake on LAN technology J7C1 Table 36 I Chassis fan (Fan 1) J10A2 Table 37
Figure 10. Power and Hardware Control Connectors
56
Technical Reference
For information about Refer to
The power connector Section 1.12.2.1, page 37 The functions of the fan connectors Section 1.12.2.2, page 38 Wake on LAN technology Section 1.12.2.3, page 39
CAUTION
Use only an ATX12V-compliant power suppIy with this board. ATX12V power supplies have two additional power leads that provide required supplemental power for the Intel Pentium processor and the Intel 850 chipset. Always connect both additional power supply leads of the ATX12V power supply, otherwise the board and the processor could be damaged.
Do not use a standard ATX power supply. Doing so could damage the board and the processor.
Table 29. ATX12V Power Connector (J3H1)
Pin Signal Name Pin Signal Name
1 Ground 3 +12 V 2 Ground 4 +12 V
4
Table 30. Processor Voltage Regulator Fan Connector (J3M1)
Pin Signal Name
1 Ground 2 +12 V 3 Ground
Table 31. RIMM Fan Connector (J7M2)
Pin Signal Name
1 FAN_CNTRL 2 +12 V 3 Tachometer (FAN_2)
Table 32. Processor Fan Connector (J6L1)
Pin Signal Name
1 FAN_CNTRL 2 +12 V 3 Tachometer (FAN_3)
57
Intel Desktop Board D850GB Technical Product Specification
Table 33. Main Power Connector (J10K1)
Pin Signal Name Pin Signal Name
1 +3.3 V 11 +3.3 V 2 +3.3 V 12 -12 V 3 Ground 13 Ground 4 +5 V 14 PS-ON# (power supply remote on/off) 5 Ground 15 Ground 6 +5 V 16 Ground 7 Ground 17 Ground 8 PWRGD (Power Good) 18 TP_PWRCONN_18 9 +5 V (Standby) 19 +5 V 10 +12 V 20 +5 V
Table 34. Auxiliary Power (J9J1)
Pin Signal Name
1 Ground 2 Ground 3 Ground 4 +3.3 V 5 +3.3 V 6 +5 V
Table 35. Wake on Ring Connector (J8C1)
Pin Signal Name
1 Ground 2 Ring Indicate
Table 36. Wake on LAN Technology Connector (J7C1)
Pin Signal Name
1 +5 VSB 2 Ground 3 WOL
Table 37. Chassis Fan Connector (J10A2)
Pin Signal Name
1 FAN_CNTRL 2 +12 V 3 Tachometer (FAN_1)
58
Technical Reference
2.8.2.4 Add-in Board and Peripheral Interface Connectors
Figure 11 shows the location of the add-in board connector and peripheral connectors. Note the following considerations for the PCI bus connectors:
All of the PCI bus connectors are bus master capable.
PCI bus connector 2 has SMBus signals routed to it. This enables PCI bus add-in boards with
SMBus support to access sensor data on the board. The specific SMBus signals are as follows:
The SMBus clock line is connected to pin A40 The SMBus data line is connected to pin A41
C D EA B F G
240 1
240 1
2 1
IJ
39
39
34 33
H
OM10446
Item Description Reference Designator For more information see:
A Communication and networking riser (CNR) J3A1 Table 38 B PCI bus connector 5 J4A1 Table 39 C PCI bus connector 4 J4B1 Table 39 D PCI bus connector 3 J4C1 Table 39 E PCI bus connector 2 J4D1 Table 39 F PCI bus connector 1 J4E1 Table 39 G AGP connector J5E1 Table 40 H Diskette drive J10G1 Table 42 I Primary IDE J9G2 Table 41 J Secondary IDE J9G1 Table 41
Figure 11. Add-in Board and Peripheral Interface Connectors
59
Intel Desktop Board D850GB Technical Product Specification
Table 38. CNR Connector (J3A1)
Pin Signal Name
A1 Reserved B1 Reserved A2 Reserved B2 Reserved A3 Ground B3 Reserved A4 Reserved B4 Ground A5 Reserved B5 Reserved A6 Ground B6 Reserved A7 LAN_TXD2 B7 Ground A8 LAN_TXD0 B8 LAN_TXD1 A9 Ground B9 LAN_RSTSYNC A10 LAN_CLK B10 Ground A11 LAN_RXD1 B11 LAN_RXD2 A12 Reserved B12 LAN_RXD0 A13 USB+ B13 Ground A14 Ground B14 Reserved A15 USB- B15 +5V (dual) A16 +12V B16 USB_OC A17 Ground B17 Ground A18 +3.3 V (dual) B18 -12V A19 +5 V B19 +3.3 V A20 Ground B20 Ground A21 EEDI B21 EED0 A22 EECS B22 EECK A23 SMB_A1 B23 Ground A24 SMB_A2 B24 SMB_A0 A25 SMB_SDA B25 SMB_SCL A26 AC97_RESET B26 CDC_DWN_ENAB A27 Reserved B27 Ground A28 AC97_SDATA_IN1 B28 AC97_SYNC A29 AC97_SDATA_IN0 B29 AC97_SDATA_OUT A30 Ground B30 AC97_BITCLK
Pin Signal Name
For information about Refer to
The CNR Section 1.10, page 31
60
Technical Reference
Table 39. PCI Bus Connectors (J4A1, J4B1, J4C1, J4D1, J4E1)
Pin Signal Name Pin Signal Name Pin Signal Name Pin Signal Name
A1 Ground (TRST#)* B1 -12 V A32 AD16 B32 AD17 A2 +12 V B2 Ground (TCK)* A33 +3.3 V B33 C/BE2# A3 +5 V (TMS)* B3 Ground A34 FRAME# B34 Ground A4 +5 V (TDI)* B4 Not connected (TDO)* A35 Ground B35 IRDY# A5 +5 V B5 +5 V A36 TRDY# B36 +3.3 V A6 INTA# B6 +5 V A37 Ground B37 DEVSEL# A7 INTC# B7 INTB# A38 STOP# B38 Ground A8 +5 V B8 INTD# A39 +3.3 V B39 LOCK# A9 Reserved B9 Not connected
(PRSNT1#)* A10 +5 V (I/O) B10 Reserved A41 Reserved *** B41 +3.3 V A11 Reserved B11 Not connected
(PRSNT2#)* A12 Ground B12 Ground A43 PAR B43 +3.3 V A13 Ground B13 Ground A44 AD15 B44 C/BE1# A14 +3.3 V aux B14 Reserved A45 +3.3 V B45 AD14 A15 RST# B15 Ground A46 AD13 B46 Ground A16 +5 V (I/O) B16 CLK A47 AD11 B47 AD12 A17 GNT# B17 Ground A48 Ground B48 AD10 A18 Ground B18 REQ# A49 AD09 B49 Ground A19 PME# B19 +5 V (I/O) A50 Key B50 Key A20 AD30 B20 AD31 A51 Key B51 Key A21 +3.3 V B21 AD29 A52 C/BE0# B52 AD08 A22 AD28 B22 Ground A53 +3.3 V B53 AD07 A23 AD26 B23 AD27 A54 AD06 B54 +3.3 V A24 Ground B24 AD25 A55 AD04 B55 AD05 A25 AD24 B25 +3.3 V A56 Ground B56 AD03 A26 IDSEL B26 C/BE3# A57 AD02 B57 Ground A27 +3.3 V B27 AD23 A58 AD00 B58 AD01 A28 AD22 B28 Ground A59 +5 V (I/O) B59 +5 V (I/O) A29 AD20 B29 AD21 A60 REQ64C# B60 ACK64C# A30 Ground B30 AD19 A61 +5 V B61 +5 V A31 AD18 B31 +3.3 V A62 +5 V B62 +5 V
* These signals (in parentheses) are optional in the P CI specification and are not currently implemented. ** On PCI bus c onnector 2 (J4D1), this pin is connected to the SMBus c l ock line. *** On PCI bus connector 2 (J4D1), this pin is connected to the SMBus dat a line.
A40 Reserved ** B40 PERR#
A42 Ground B42 SERR#
61
Intel Desktop Board D850GB Technical Product Specification
Table 40. AGP Connector (J5E1)
Pin Signal Name Pin Signal Name Pin Signal Name Pin Signal Name
A1 +12 V B1 Not connected A34 Vddq B34 Vddq A2 TYPEDET# B2 +5 V A35 AD22 B35 AD21 A3 Reserved B3 +5 V A36 AD20 B36 AD19 A4 Not connected B4 Not connected A37 Ground B37 Ground A5 Ground B5 Ground A38 AD18 B38 AD17 A6 INTA# B6 INTB# A39 AD16 B39 C/BE2# A7 RST# B7 CLK A40 Vddq B40 Vddq A8 GNT1# B8 REQ# A41 FRAME# B41 IRDY# A9 Vcc3.3 B9 Vcc3.3 A42 Reserved B42 +3.3 V (aux) A10 ST1 B10 ST0 A43 Ground B43 Ground A11 Reserved B11 ST2 A44 Reserved B44 Reserved A12 PIPE# B12 RBF# A45 Vcc3.3 B45 Vcc3.3 A13 Ground B13 Ground A46 TRDY# B46 DEVSEL# A14 WBF# B14 Not connected A47 STOP# B47 Vddq A15 SBA1 B15 SBA0 A48 PME# B48 PERR# A16 Vcc3.3 B16 Vcc3.3 A49 Ground B49 Ground A17 SBA3 B17 SBA2 A50 PAR B50 SERR# A18 SBSTB# B18 SB_STB A51 AD15 B51 C/BE1# A19 Ground B19 Ground A52 Vddq B52 Vddq A20 SBA5 B20 SBA4 A53 AD13 B53 AD14 A21 SBA7 B21 SBA6 A54 AD11 B54 AD12 A22 Reserved B22 Reserved A55 Ground B55 Ground A23 Ground B23 Ground A56 AD9 B56 AD10 A24 Reserved B24 +3.3 V (aux) A57 C/BE0# B57 AD8 A25 Vcc3.3 B25 Vcc3.3 A58 Vddq B58 Vddq A26 AD30 B26 AD31 A59 AD_STB0# B59 AD_STB0 A27 AD28 B27 AD29 A60 AD6 B60 AD7 A28 Vcc3.3 B28 Vcc3.3 A61 Ground B61 Ground A29 AD26 B29 AD27 A62 AD4 B62 AD5 A30 AD24 B30 AD25 A63 AD2 B63 AD3 A31 Ground B31 Ground A64 Vddq B64 Vddq A32 AD_STB1# B32 AD_STB1 A65 AD0 B65 AD1 A33 C/BE3# B33 AD23 A66 VRREFG_C B66 VREFC_G
NOTE
The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy 3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V AGP cards.
62
Table 41. PCI IDE Connectors (J9G2, Primary and J9G1, Secondary)
Pin Signal Name Pin Signal Name
1 Reset IDE 2 Ground 3 Data 7 4 Data 8 5 Data 6 6 Data 9 7 Data 5 8 Data 10 9 Data 4 10 Data 11 11 Data 3 12 Data 12 13 Data 2 14 Data 13 15 Data 1 16 Data 14 17 Data 0 18 Data 15 19 Ground 20 Key 21 DDRQ0 [DDRQ1] 22 Ground 23 I/O Write# 24 Ground 25 I/O Read# 26 Ground 27 IOCHRDY 28 P_ALE (Cable Select pull-up) 29 DDACK0# [DDACK1#] 30 Ground 31 IRQ 14 [IRQ 15] 32 Reserved 33 DAG1 (Address 1) 34 GPIO_DMA66_Detect_Pri (GPIO_DMA66_Detect_Sec) 35 DAG0 (Address 0) 36 DAG2 (Address 2) 37 Chip Select 1P# [Chip Select 1S#] 38 Chip Select 3P# [Chip Select 3S#] 39 Activity# 40 Ground
Signal names in brackets ([ ]) are for the secondary IDE connector.
Technical Reference
63
Intel Desktop Board D850GB Technical Product Specification
Table 42. Diskette Drive Connector (J10G1)
Pin Signal Name Pin Signal Name
1 Ground 2 DENSEL 3 Ground 4 Reserved 5 Key 6 FDEDIN 7 Ground 8 FDINDX# (Index) 9 Ground 10 FDM00# (Motor Enable A) 11 Ground 12 Not connected 13 Ground 14 FDDS0# (Drive Select A) 15 Ground 16 Not connected 17 Not connected 18 FDDIR# (Stepper Motor Direction) 19 Ground 20 FDSTEP# (Step Pulse) 21 Ground 22 FDWD# (Write Data) 23 Ground 24 FDWE# (Write Enable) 25 Ground 26 FDTRK0# (Track 0) 27 Not connected 28 FDWPD# (Write Protect) 29 Ground 30 FDRDATA# (Read Data) 31 Ground 32 FDHEAD# (Side 1 Select) 33 Ground 34 DSKCHG# (Diskette Change)
64

2.8.3 External I/O Connectors

Figure 12 shows the locations of the external I/O connectors.
Technical Reference
1
1
2
1
2
1 7
10
16
15
BA
DC
Item Description Reference Designator For more information see:
A SCSI LED J7A2 Table 43 B Front panel USB J9C1 Table 44 C Auxiliary front panel power LED J8C3 Table 45 D Front panel J9D2 Table 46
Figure 12. External I/O Connectors
OM10447
65
Intel Desktop Board D850GB Technical Product Specification
Table 43. SCSI LED Connector (J7A2)
Pin Signal Name
1 SCSI activity 2 Not connected
Table 44. Front Panel USB Connector (J9C1)
Pin Signal Name Pin Signal Name
1 VREG_FP_USB_PWR 2 VREG_FP_USB_PWR 3 ICH_U_P2# 4 ICH_U_P3# 5 ICH_U_P2 6 ICH_U_P3 7 Ground 8 Ground 9 Key (no pin) 10 ICU_U_OC1_2#
2.8.3.1 Auxiliary Front Panel Power/Sleep/Message Waiting LED Connector
This connector duplicates on pins 1 and 3, the signals on pins 2 and 4 of the front panel connector.
Table 45. Auxiliary Front Panel Power/Sleep/Message Waiting LED Connector (J8C3)
Pin Signal Name In/Out Description
1 HDR_BLNK_GRN Out Front panel green LED 2 Not connected 3 HDR_BLNK_YEL Out Front panel yellow LED
2.8.3.2 Front Panel Connector
This section describes the functions of the front panel connector. Table 46 lists the signal names of the front panel connector.
Table 46. Front Panel Connector (J9D2)
Pin Signal In/Out Description Pin Signal In/Out Description
1 HD_PWR Out Hard disk LED pull-
up (330 ) to +5 V
3 HAD# Out Hard disk active LED 4 HDR_BLNK_
5 Ground Ground 6 FPBUT_IN In Power switch 7 FP_RESET# In Reset switch 8 Ground Ground 9 +5 V Out IR Power 10 N/C 11 Reserved In Reserved 12 Ground Ground 13 Ground Ground 14 (pin removed) Not connected 15 Reserved Out Reserved 16 +5 V Out Power
2 HDR_BLNK_
GRN
YEL
Out Front panel green
LED
Out Front panel yellow
LED
66
Technical Reference
2.8.3.2.1 Reset Switch Connector
Pins 5 and 7 can be connected to a momentary SPST type switch that is normally open. When the switch is closed, the D850GB board resets and runs the POST.
2.8.3.2.2 Hard Drive Activity LED Connector
Pins 1 and 3 can be connected to an LED to provide a visual indicator that data is being read from or written to a hard drive. For the LED to function properly, an IDE drive must be connected to the onboard IDE interface. The LED will also show activity for devices connected to the SCSI hard drive activity LED connector.
For information about Refer to
The SCSI hard drive activity LED connector Section 1.6.3.2, page 25
2.8.3.2.3 Power/Sleep/Message Waiting LED Connector
Pins 2 and 4 can be connected to a one- or two-colored LED. Table 47 shows the possible states for a one-colored LED. Table 48 shows the possible states for a two-colored LED.
Table 47. States for a One Color Power LED
LED State Description
Off Power off/sleeping Steady Green Running Blinking Green Running/message waiting
Table 48. States for a Two Color Power LED
LED State Description
Off Power off Steady Green Running Blinking Green Running/message waiting Steady Yellow Sleeping Blinking Yellow Sleeping/message waiting
NOTE
To use the message waiting function, ACPI must be enabled in the operating system and a message-capturing application must be invoked.
2.8.3.2.4 Power Switch Connector
Pins 6 and 8 can be connected to a front panel momentary-contact power switch. The switch must pull the SW_ON# pin to ground for at least 50 ms to signal the power supply to switch on or off. (The time requirement is due to internal debounce circuitry on the D850GB board.) At least two seconds must pass before the power supply will recognize another on/off signal.
67
Intel Desktop Board D850GB Technical Product Specification

2.9 Jumper Blocks

CAUTION
Do not move any jumpers with the power on. Always turn off the power and unplug the power cord from the computer before changing a jumper setting. Otherwise, the board could be damaged.
The board has two jumper blocks. Figure 13 shows the location of the jumper blocks.
4
3
1
J8C2
Reference Designator Description
J8C2 BIOS configuration jumper block J8D1 USB front panel / CNR jumper block
1 3
J8D1
6
OM10448
Figure 13. Location of the Jumper Blocks
68
Technical Reference

2.9.1 BIOS Setup Configuration Jumper Bl ock

This 3-pin jumper block determines the BIOS Setup program’s mode. Table 49 describes the jumper settings for the three modes: normal, configure, and recovery. When the jumper is set to configuration mode and the computer is powered-up, the BIOS compares the processor version and the microcode version in the BIOS and reports if the two match.
Table 49. BIOS Setup Configuration Jumper Settings (J8C2)
Function/Mode Jumper Setting Configuration
Normal
1-2
Configure
2-3
Recovery
None
3
1
3
1
3
1
The BIOS uses current configuration information and passwords for booting.
After the POST runs, Setup runs automatically. The maintenance menu is displayed.
The BIOS attempts to recover the BIOS configuration. A recovery diskette is required.
For information about Refer to
How to access the BIOS Setup program Section 4.1, page 89 The maintenance menu of the BIOS Setup program Section 4.2, page 90 BIOS recovery Section 3.7, page 85

2.9.2 USB Port 2 Routing Jumper Block

This 6-pin jumper block routes the signals of USB port 2. Table 50 describes the jumper settings for USB port 2. Figure 13 shows the location of the Front Panel USB connector.
Table 50. USB Port 2 Routing Jumper Settings (J8D1)
Jumper Setting Configuration
USB port 2 signals are routed to the Front Panel USB connector.
4
6
USB port 2 signals are routed to the CNR connector.
4
6
2-3 and 5-6
1-2 and 4-5
For information about Refer to
The location of the Front Panel USB connector Figure 12, page 65 The location of the CNR connector Figure 11, page 59
1
3
1
3
69
Intel Desktop Board D850GB Technical Product Specification

2.10 Mechanical Considerations

2.10.1 Form Factor

The D850GB board is designed to fit into an ATX-form-factor chassis. Figure 14 illustrates the mechanical form factor for the D850GB board. Dimensions are given in inches [millimeters]. The outer dimensions are 9.60 inches by 12.00 inches [243.84 millimeters by 304.80 millimeters]. Location of the I/O connectors and mounting holes are in compliance with the ATX specification (see Section 1.3).
6.50[165.10]
6.10[154.94]
5.20[132.08]
0.00
2.850[72.39]
3.10[78.74]
0.65[16.51]
0.00
3.10
[78.74]
4.90
[124.46]
11.10[281.94]
Figure 14. D850GB Board Dimensions
NOTE
There may be mechanical interference with installed RDRAM modules in some combinations of ATX chassis and peripherals, such as CD-ROM drives.
11.35[288.29]
OM10449
70
Technical Reference

2.10.2 I/O Shield

The back panel I/O shield for the D850GB board must meet specific dimension and material requirements. Systems based on this board need the back panel I/O shield to pass certification testing. Figure 15 shows the critical dimensions of the chassis-dependent I/O shield. Dimensions
are given in inches to a tolerance of ±0.02 inches. The figure also indicates the position of each cutout. Additional design considerations for I/O
shields relative to chassis requirements are described in the ATX specification. See Section 1.3 for information about the ATX specification.
NOTE
An I/O shield compliant with the ATX chassis specification 2.01 is available from Intel.
6.390 Ref [162.30]
0.787 ± .010 Typ.[20±0.254]
0.61[15.494]
0.94 Ref
0.884[22.45]
0.280[7.10]
0.039[0.99] Dia
0.00[0]
0.450[11.43]
0.568[14.427]
8x R 0.5 Min
Ref
0.00[0]
0.442[11.218]
1.189[30.197]
1.799[45.684]
6.268[159.20]
2.071[52.60]
3x Dia 0.366[9.30]
4.404[111.854]
4.572[116.116]
Pictorial View
0.171[4.33]
0.321[8.14]
0.471[11.95]
0.621[15.76]
5.546[140.860]
0.519 [13.19]
0.027 [0.69]
0.465 [11.81]
0.718 [18.24]
1.890
[48.00]
Ref
OM10451A
Figure 15. I/O Shield Dimensions
71
Intel Desktop Board D850GB Technical Product Specification

2.11 Electrical Considerations

2.11.1 Power Consumption

Table 51 lists voltage and current measurements for a computer that contains the D850GB board and the following:
1.4 GHz Intel Pentium 4 processor with a 256 KB cache
128 MB RDRAM
3.5-inch diskette drive
6.4 GB IDE hard disk drive
40X IDE CD-ROM drive
This information is provided only as a guide for calculating approximate power usage with additional resources added.
Values for the Windows 98 desktop mode are measured at 640 x 480 x 256 colors and 60 Hz refresh rate. AC watts are measured with the computer is connected to a typical 250 W power supply, at nominal input voltage and frequency, with a true RMS wattmeter at the line input.
NOTE
Actual system power consumption depends upon system configuration. The power supply should comply with the recommendations found in the ATX / ATX12V Power Supply Design Guide, Version 1.1 (see Table 3 on page 16 for specification information).
Table 51. Power Usage
DC Current at: Mode AC Power +3.3 V +5 V +12 V -12 V +5 VSB
Windows 98 APM full on 88.6 W 3.95 A 1.0 A 0.68 A -0.27 A 0.18 A Windows 98 APM Suspend 54.3 W 3.96 A 0.99 A 0.30 A -0.24 A 0.14 A Windows 98 ACPI S0 57.6 W 3.91 A 0.99 A 0.30 A -0.26 A 0.21 A Windows 98 ACPI S1 54.1 W 3.88 A 0.89 A 0.31 A -0.27 A 0.21 A Windows 98 ACPI S3 4.1 W 0.0 A 0.0 A 0.0 A 0.0 A 0.37 A

2.11.2 Add-in Board Considerations

The D850GB board is designed to provide 2 A (average) of +5 V current for each add-in board. The total +5 V current draw for add-in boards in a fully-loaded D850GB board (all six expansion slots filled) must not exceed 12 A.
72
Technical Reference

2.11.3 Standby Current Requirements

CAUTION
If the standby current necessary to support multiple wake events from the PCI and/or USB buses exceeds power supply capacity, the D850GB board may lose register settings stored in memory, etc. Calculate the standby current requirements using the steps described below.
Power supplies used with the D850GB board must be able to provide enough standby current to support the Instantly Available (ACPI S3 sleep state) configuration as outlined in Table 52 below.
Values are determined by specifications such as PCI 2.2. Actual measured values may vary. To estimate the amount of standby current required for a particular system configuration, standby
current requirements of all installed components must be added to determine the total standby current requirement. Refer to the descriptions in Table 52 and review the following steps.
1. Note the total D850GB board standby current requirement.
2. Add to that the total PS/2 port standby current requirement if a wake-enabled device is connected.
3. Add, from the PCI 2.2 slots (wake enabled) row, the total number of wake-enabled devices installed (PCI and AGP) and multiply by the standby current requirement.
4. Add, from the PCI 2.2 slots (nonwake enabled) row, the total number of wake-enabled devices installed (PCI and AGP) and multiply by the standby current requirement.
5. Add all additional wake-enabled devices’ and nonwake-enabled devices’ standby current
requirements as applicable.
6. Add all the required current totals from steps 1 through 5 to determine the total estimated standby current power supply requirement.
Table 52. Standby Current Requirements
Instantly Available Current Support (Estimated for Integrated Board Components)
Instantly Available Stand-by Current Support
Estimated for add-on
components
Add to Instantly Available
total current requirement
(See instructions above)
Note: Dependent upon system configuration
Description
Total for D850GB board 300 PS/2 ports PCI 2.2 slots (wake enabled) 375 PCI 2.2 slots (nonwake enabled) 20 WOL header 525 CNR (Note) 375 USB ports
Standby Current Requirements (mA)
(Note)
345
(Note)
500
73
Intel Desktop Board D850GB Technical Product Specification
NOTE
IBM PS/2 Port Specification (Sept 1991) states:
275 mA for keyboard
70 mA for the mouse (nonwake-enable device)
PCI/AGP requirements are calculated by totaling the following:
One wake-enabled device @ 375 mA, plus
Five nonwake-enabled devices @ 20 mA each, plus
USB requirements are calculated as:
One wake-enabled device @ 500 mA
USB hub @ 100 mA
Three USB nonwake-enabled devices connected @ 2.5 mA each
NOTE
Both USB ports are capable of providing up to 500 mA during normal G0/S0 operation. Only one USB port will support up to 500 mA of stand-by-current (wake-enabled device) during G1/S3 suspended operation. The other port may provide up to 7.5 mA (three nonwake-enabled devices.) during G1/S3 suspended operation.

2.11.4 Fan Connector Current Capability

The D850GB board is designed to supply a maximum of 225 mA per fan connector.

2.11.5 Power Supply Considerations

CAUTION
The +5 V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to do so can damage the power supply. The total amount of standby current required depends on the wake devices supported and manufacturing options. Refer to Section 2.11.3 on page 73 for additional information.
System integrators should refer to the power usage values listed in Table 51 when selecting a power supply for use with the D850GB board.
Measurements account only for current sourced by the D850GB board while running in idle modes of the started operating systems.
Additional power required will depend on configurations chosen by the integrator. The power supply must comply with the following recommendations found in the indicated
sections of the ATX form factor specification.
The potential relation between 3.3 VDC and +5 VDC power rails (Section 4.2)
The current capability of the +5 VSB line (Section 4.2.1.2)
All timing parameters (Section 4.2.1.3)
All voltage tolerances (Section 4.2.2)
For information about Refer to
The ATX form factor specification Section 1.3, page 16
74
Technical Reference

2.12 Thermal Considerations

CAUTION
Ensure that the ambient temperature does not exceed the board’s maximum operating temperature by more than 10 temperature and malfunction. For information about the maximum operating temperature, see the environmental specifications in Section 2.14.
CAUTION
Ensure that proper airflow is maintained in the processor voltage regulator circuit. Failure to do so may result in damage to the voltage regulator circuit. The processor voltage regulator area (item A in Figure 16) can reach a temperature of up to 85
Figure 16 shows the locations of the localized high temperature zones.
o
C. Failure to do so could cause components to exceed their maximum case
o
C in an open chassis.
D
A Processor voltage regulator area B Processor C Intel 82850 MCH D Intel 82801BA ICH2
OM10450
A
B
C
Figure 16. Localized High Temperature Zones
75
Intel Desktop Board D850GB Technical Product Specification
Table 53 provides maximum case temperatures for D850GB board components that are sensitive to thermal changes. Case temperatures could be affected by the operating temperature, current load, or operating frequency. Maximum case temperatures are important when considering proper airflow to cool the D850GB board.
Table 53. Thermal Considerations for Components
Component Maximum Case Temperature
Intel Pentium 4 processor For processor case temperature, see processor datasheets and
processor specification updates
Intel 82850 MCH 105 oC (under bias) Intel 82801BA ICH2 109 oC (under bias)
For information about Refer to
Intel Pentium 4 processor datasheets and specification updates Section 1.2, page 16

2.13 Reliability

The mean time between failures (MTBF) prediction is calculated using component and subassembly random failure rates. The calculation is based on the Bellcore Reliability Prediction Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF prediction is used to estimate repair rates and spare parts requirements.
The Mean Time Between Failures (MTBF) data is calculated from predicted data at 55 ºC. D850GB board MTBF: 104769.75 hours
76
Technical Reference

2.14 Environmental

Table 54 lists the environmental specifications for the D850GB board.
Table 54. D850GB Board Environmental Specifications
Parameter Specification Temperature
Non-Operating -40 °C to +70 °C Operating 0 °C to +55 °C
Shock
Unpackaged 30 g trapezoidal waveform Velocity change of 170 inches/second Packaged Half sine 2 millisecond Product Weight (pounds) Free Fall (inches) Velocity Change (inches/sec) <20 36 167 21-40 30 152 41-80 24 136 81-100 18 118
Vibration
Unpackaged 5 Hz to 20 Hz: 0.01 g² Hz sloping up to 0.02 g² Hz 20 Hz to 500 Hz: 0.02 g² Hz (flat) Packaged 10 Hz to 40 Hz: 0.015 g² Hz (flat) 40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz
77
Intel Desktop Board D850GB Technical Product Specification

2.15 Regulatory Compliance

This section describes the D850GB board’s compliance with safety and EMC regulations.

2.15.1 Safety Regulations

Table 55 lists the safety regulations the D850GB board complies with when it is correctly installed in a compatible host system.
Table 55. Safety Regulations
Regulation Title
UL 1950/CSA950, 3rd edition, Dated 07-28-95
EN 60950, 2nd Edition, 1992 (with Amendments 1, 2, 3, and 4)
IEC 950, 2nd edition, 1991 (with Amendments 1, 2, 3, and 4)
EMKO-TSE (74-SEC) 207/94 Summary of Nordic deviations to EN 60950. (Norway, Sweden,
Bi-National Standard for Safety of Information Technology Equipment including Electrical Business Equipment. (USA and Canada)
The Standard for Safety of Information Technology Equipment including Electrical Business Equipment. (European Community)
The Standard for Safety of Information Technology Equipment including Electrical Business Equipment. (International)
Denmark, and Finland)

2.15.2 EMC Regulations

Table 56 lists the EMC regulations with which the D850GB board complies when it is correctly installed in a compatible host system.
Table 56. EMC Regulations
Regulation Title
FCC Class B Title 47 of the Code of Federal Regulations, Parts 2 and 15, Subpart B,
pertaining to unintentional radiators. (USA)
CISPR 22, 2nd Edition, 1993 (Class B)
VCCI Class B (ITE) Implementation Regulations for Voluntary Control of Radio Interference
EN55022 (1994) (Class B) Limits and methods of measurement of Radio Interference
EN50082-1 (1992) Generic Immunity Standard; currently compliance is determined via
ICES-003 (1997) Interference-Causing Equipment Standard, Digital Apparatus, Class B
AS/NZ 3548 Australian Communications Authority (ACA), Standard for
Limits and methods of measurement of Radio Interference Characteristics of Information Technology Equipment. (International)
by Data Processing Equipment and Electronic Office Machines. (Japan)
Characteristics of Information Technology Equipment. (Europe)
testing to IEC 801-2, -3, and -4. (Europe)
(Including CRC c.1374). (Canada)
Electromagnetic Compatibility.
78
Technical Reference

2.15.3 Certification Markings

This printed circuit assembly has the following markings related to product certification:
UL Joint Recognition Mark: Consists of small c followed by a stylized backward UR and followed by a small US (Component side)
Manufacturer’s recognition mark: Consists of a unique UL recognized manufacturer’s logo, along with a flammability rating (94V-0) (Solder side)
UL File Number for D850GB boards: E139761 (Component side)
PB Part Number: Intel bare circuit board part number (Solder side) PB A22167-003
Battery “+ Side Up” marking: located on the component side of the D850GB board in close
proximity to the battery holder
FCC Logo/Declaration: (Solder side)
ACA (C-Tick) mark: Consists of a unique letter C, with a tick mark; followed by N-232.
Located on the component side of the D850GB board and on the shipping container
CE Mark: (Component side) The CE mark should also be on the shipping container
79
Intel Desktop Board D850GB Technical Product Specification
80

3 Overview of BIOS Features

What This Chapter Contains
3.1 Introduction.................................................................................................................81
3.2 BIOS Flash Memory Organization..............................................................................82
3.3 Resource Configuration..............................................................................................82
3.4 System Management BIOS (SMBIOS).......................................................................83
3.5 Legacy USB Support..................................................................................................83
3.6 BIOS Updates ............................................................................................................84
3.7 Recovering BIOS Data...............................................................................................85
3.8 Boot Options...............................................................................................................86
®
3.9 Fast Boot ing Syst ems with Intel
3.10 BIOS Security Features..............................................................................................88
Rapid BIOS Boot....................................................86

3.1 Introduction

The D850GB board uses an Intel/AMI BIOS, which is stored in flash memory and can be updated using a disk-based program. In addition to the BIOS, the flash memory contains the BIOS Setup program, POST, APM, the PCI auto-configuration utility, and Plug and Play support.
The D850GB board supports system BIOS shadowing, allowing the BIOS to execute from 64-bit onboard write-protected system memory.
The BIOS displays a message during POST identifying the type of BIOS and a revision code. The initial production BIOS is identified as GB85010A.86A.
For information about Refer to
The D850GB board’s compliance level with APM and Plug and Play Section 1.3, page 16
81
Intel Desktop Board D850GB Technical Product Specification

3.2 BIOS Flash Memory Organization

The SST 49LF004A Firmware Hub (FWH) includes a 4 Mbit (512 KB) symmetrical flash memory device. Internally, the device is grouped into eight 64-KB blocks that are individually erasable, lockable, and unlockable.

3.3 Resource Configuration

3.3.1 PCI Autoconfiguration

The BIOS can automatically configure PCI devices. PCI devices may be onboard or add-in cards. Autoconfiguration lets a user insert or remove PCI cards without having to configure the system. When a user turns on the system after adding a PCI card, the BIOS automatically configures interrupts, the I/O space, and other system resources. Any interrupts set to Available in Setup are considered to be available for use by the add-in card. Autoconfiguration information is stored in ESCD format.
For information about the versions of PCI and Plug and Play supported by the BIOS, see Section 1.3.

3.3.2 PCI IDE Support

If you select Auto in the BIOS Setup program, the BIOS automatically sets up the two PCI IDE connectors with independent I/O channel support. The IDE interface supports hard drives up to ATA-66/100 and recognizes any ATAPI compliant devices, including CD-ROM drives, tape drives, and Ultra DMA drives (see Section 1.3 for the supported version of ATAPI). The BIOS determines the capabilities of each drive and configures them to optimize capacity and performance. To take advantage of the high capacities typically available today, hard drives are automatically configured for Logical Block Addressing (LBA) and to PIO Mode 3 or 4, depending on the capability of the drive. You can override the auto-configuration options by specifying manual configuration in the BIOS Setup program.
To use ATA-66/100 features the following items are required:
An ATA-66/100 peripheral device
An ATA-66/100 compatible cable
ATA-66/100 operating system device drivers
NOTE
ATA-66/100 compatible cables are backward compatible with drives using slower IDE transfer protocols. If an ATA-66/100 disk drive and a disk drive using any other IDE transfer protocol are attached to the same cable, the maximum transfer rate between the drives is reduced to that of the slowest device.
NOTE
Do not connect an ATA device as a slave on the same IDE cable as an ATAPI master device. For example, do not connect an ATA hard drive as a slave to an ATAPI CD-ROM drive.
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Overview of BIOS Features

3.4 System Management BIOS (SMBIOS)

SMBIOS is a Desktop Management Interface (DMI) compliant method for managing computers in a managed network.
The main component of SMBIOS is the management information format (MIF) database, which contains information about the computing system and its components. Using SMBIOS, a system administrator can obtain the system types, capabilities, operational status, and installation dates for system components. The MIF database defines the data and provides the method for accessing this information. The BIOS enables applications such as third-party management software to use SMBIOS. The BIOS stores and reports the following SMBIOS information:
BIOS data, such as the BIOS revision level
Fixed-system data, such as peripherals, serial numbers, and asset tags
Resource data, such as memory size, cache size, and processor speed
Dynamic data, such as event detection and error logging
Non-Plug and Play operating systems, such as Windows NT obtaining the SMBIOS information. The BIOS supports an SMBIOS table interface for such operating systems. Using this support, an SMBIOS service-level application running on a non-Plug and Play operating system can obtain the SMBIOS information.
, require an additional interface for
For information about Refer to
The D850GB board’s compliance level with SMBIOS Section 1.3, page 16

3.5 Legacy USB Support

Legacy USB support enables USB devices such as keyboards, mice, and hubs to be used even
when the operating system’s USB drivers are not yet available. Legacy USB support is used to access the BIOS Setup program, and to install an operating system that supports USB. By default, Legacy USB support is set to Enabled.
Legacy USB support operates as follows:
1. When you apply power to the computer, legacy support is disabled.
2. POST begins.
3. Legacy USB support is enabled by the BIOS allowing you to use a USB keyboard to enter and configure the BIOS Setup program and the maintenance menu.
4. POST completes.
5. The operating system loads. While the operating system is loading, USB keyboards and mice are recognized and may be used to configure the operating system. (Keyboards and mice are not recognized during this period if Legacy USB support was set to Disabled in the BIOS Setup program.)
6. After the operating system loads the USB drivers, all legacy and non-legacy USB devices are recognized by the operating system, and Legacy USB support from the BIOS is no longer used.
To install an operating system that supports USB, verify that Legacy USB support in the BIOS Setup program is set to Enabled and follow the operating system’s installation instructions.
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Intel Desktop Board D850GB Technical Product Specification
NOTE
Legacy USB support is for keyboards, mice, and hubs only. Other USB devices are not supported in legacy mode.

3.6 BIOS Updates

The BIOS can be updated using either of the following utilities, which are available on the Intel World Wide Web site:
®
Intel
Intel
Both utilities support the following BIOS maintenance functions:
Verifying that the updated BIOS matches the target system to prevent accidentally installing
Updating both the BIOS boot block and the main BIOS. This process is fault tolerant to
Updating the BIOS boot block separately.
Changing the language section of the BIOS.
Updating replaceable BIOS modules, such as the video BIOS module.
Inserting a custom splash screen.
Express BIOS Update utility, which enables automated updating while in the Windows environment. Using this utility, the BIOS can be updated from a file on a hard disk, a 1.44 MB diskette, or a CD-ROM, or from the file location on the Web.
®
Flash Memory Update Utility, which requires creation of a boot diskette and manual rebooting of the system. Using this utility, the BIOS can be updated from a file on a 1.44 MB diskette (from a legacy diskette drive or an LS-120 diskette drive) or a CD-ROM.
an incompatible BIOS.
prevent boot block corruption.
NOTE
Review the instructions distributed with the upgrade utility before attempting a BIOS update.
For information about Refer to
The Intel World Wide Web site Section 1.2, page 16

3.6.1 Language Support

The BIOS Setup program and help messages are supported in five languages: US English, German, Italian, French, and Spanish. The default language is US English, which is present unless another language is selected in the BIOS Setup program.
84
Overview of BIOS Features

3.6.2 Custom Splash Screen

During POST, an Intel splash screen is displayed by default. This splash screen can be replaced with a custom splash screen. A utility is available from Intel to assist with creating a custom splash screen. The custom splash screen can be programmed into the flash memory using the BIOS upgrade utility. Information about this capability is available on the Intel Support World Wide Web site.
For information about Refer to
The Intel World Wide Web site Section 1.2, page 16

3.7 Recovering BIOS Data

Some types of failure can destroy the BIOS. For example, the data can be lost if a power outage occurs while the BIOS is being updated in flash memory. The BIOS can be recovered from a diskette using the BIOS recovery mode. When recovering the BIOS, be aware of the following:
Because of the small amount of code available in the non-erasable boot block area, there is no
video support. You can only monitor this procedure by listening to the speaker or looking at the diskette drive LED.
The recovery process may take several minutes; larger BIOS flash memory devices require
more time.
Two beeps and the end of activity in the diskette drive indicate successful BIOS recovery.
A series of continuous beeps indicates a failed BIOS recovery.
To create a BIOS recovery diskette, a bootable diskette must be created and the BIOS update files copied to it. BIOS upgrades and the Intel Flash Memory Update Utility are available from Intel Customer Support through the Intel World Wide Web site.
NOTE
Even if the computer is configured to boot from an LS-120 diskette (in the Setup program’s Removable Devices submenu), the BIOS recovery diskette must be a standard 1.44 MB diskette not a 120 MB diskette.
For information about Refer to
The BIOS recovery mode jumper settings Section 2.9.1, page 69 The Boot menu in the BIOS Setup program Section 4.7, page 105 Contacting Intel customer support Section 1.2, page 16
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Intel Desktop Board D850GB Technical Product Specification

3.8 Boot Options

In the BIOS Setup program, the user can choose to boot from a diskette drive, hard drives, CD-ROM, or the network. The default setting is for the diskette drive to be the first boot device, the hard drive second, and the ATAPI CD-ROM third. The fourth device is disabled.

3.8.1 CD-ROM and Network Boot

Booting from CD-ROM is supported in compliance to the El Torito bootable CD-ROM format specification. Under the Boot menu in the BIOS Setup program, ATAPI CD-ROM is listed as a boot device. Boot devices are defined in priority order. Accordingly, if there is not a bootable CD in the CD-ROM drive, the system will attempt to boot from the next defined drive.
The network can be selected as a boot device. This selection allows booting from the onboard LAN or a network add-in card with a remote boot ROM installed.
For information about Refer to
The El Torito specification Section 1.3, page 16

3.8.2 Booting Without Attached Devices

For use in embedded applications, the BIOS has been designed so that after passing the POST, the operating system loader is invoked even if the following devices are not present:
Video adapter
Keyboard
Mouse

3.9 Fast Booting Systems with Intel® Rapid BIOS Boot

Three factors affect system boot speed:
Selecting and configuring peripherals properly
®
Using an optimized BIOS, such as the Intel
Selecting a compatible operating system

3.9.1 Peripheral Selecti on and Configuration

The following techniques help improve system boot speed:
Choose a hard drive with parameters such as “power-up to data ready” less than eight seconds,
that minimize hard drive startup delays.
Select a CD-ROM drive with a fast initialization rate. This rate can influence POST execution
time.
Eliminate unnecessary add-in adapter features, such as logo displays, screen repaints, or mode
changes in POST. These features may add time to the boot process.
Try different monitors. Some monitors initialize and communicate with the BIOS more
quickly, which enables the system to boot more quickly.
Rapid BIOS
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Overview of BIOS Features

3.9.2 Intel Rapid BIOS Boot

Use of the following BIOS Setup program settings reduces the POST execution time. In the Boot Menu:
Set the hard disk drive as the first boot device. As a result, the POST does not first seek a
diskette drive, which saves about one second from the POST execution time.
Disable Quiet Boot, which eliminates display of the logo splash screen. This could save
several seconds of painting complex graphic images and changing video modes.
Enabled Intel Rapid BIOS Boot. This feature bypasses memory count and the search for a
diskette drive.
In the Peripheral Configuration submenu, disable the LAN device if it will not be used. This can reduce up to four seconds of option ROM boot time.
NOTE
It is possible to optimize the boot process to the point where the system boots so quickly that the Intel logo screen (or a custom logo splash screen) will not be seen. Monitors and hard disk drives with minimum initialization times can also contribute to a boot time that might be so fast that necessary logo screens and POST messages cannot be seen.
This boot time may be so fast that some drives might be not be initialized at all. If this condition should occur, it is possible to introduce a programmable delay ranging from 3 to 30 seconds (using the Hard Disk Pre-Delay feature of the Advanced Menu in the IDE Configuration Submenu of the BIOS Setup program).
For information about Refer to
IDE Configuration Submenu in the BIOS Setup program Section 4.4.3, page 97

3.9.3 Operating System

The Microsoft Windows Millennium Edition (Windows Me) operating system has built-in capabilities for making PCs boot more quickly. To speed operating system availability at boot time, limit the number of applications that load into the system tray or the task bar.
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Intel Desktop Board D850GB Technical Product Specification

3.10 BIOS Security Features

The BIOS includes security features that restrict access to the BIOS Setup program and who can boot the computer. A supervisor password and a user password can be set for the BIOS Setup program and for booting the computer, with the following restrictions:
The supervisor password gives unrestricted access to view and change all the Setup options in
the BIOS Setup program. This is the supervisor mode.
The user password gives restricted access to view and change Setup options in the BIOS Setup
program. This is the user mode.
If only the supervisor password is set, pressing the <Enter> key at the password prompt of the
BIOS Setup program allows the user restricted access to Setup.
If both the supervisor and user passwords are set, users can enter either the supervisor
password or the user password to access Setup. Users have access to Setup respective to which password is entered.
Setting the user password restricts who can boot the computer. The password prompt will be
displayed before the computer is booted. If only the supervisor password is set, the computer boots without asking for a password. If both passwords are set, the user can enter either password to boot the computer.
Table 57 shows the effects of setting the supervisor password and user password. This table is for reference only and is not displayed on the screen.
Table 57. Supervisor and User Password Functions
Password Set
Neither Can change all
Supervisor only
User only N/A Can change all
Supervisor and user set
Note: If no password is set, any user c an change all Setup options.
Supervisor Mode
options Can change all
options
Can change all options
(Note)
User Mode Setup Options
Can change all options
Can change a limited number of options
options Can change a
limited number of options
(Note)
None None None
Supervisor Password Supervisor None
Enter Password Clear User Password
Supervisor Password Enter Password
Password to Enter Setup
User User
Supervisor or user
Password During Boot
Supervisor or user
For information about Refer to
Setting user and supervisor passwords Section 4.5, page 103
88

4 BIOS Setup Program

What This Chapter Contains
4.1 Introduction.................................................................................................................89
4.2 Maintenance Menu.....................................................................................................90
4.3 Main Menu..................................................................................................................92
4.4 Advanced Menu..........................................................................................................93
4.5 Security Menu ..........................................................................................................103
4.6 Power Menu.............................................................................................................104
4.7 Boot Menu................................................................................................................105
4.8 Exit Menu.................................................................................................................107

4.1 Introduction

The BIOS Setup program can be used to view and change the BIOS settings for the computer. The BIOS Setup program is accessed by pressing the <F2> key after the Power-On Self-Test (POST) memory test begins and before the operating system boot begins. The menu bar is shown below.
Maintenance Main Advanced Security Power Boot Exit
Table 58 lists the BIOS Setup program menu features.
Table 58. BIOS Setup Program Menu Bar
Maintenance Main Advanced Security Power Boot Exit
Clears passwords and BIS credentials and enables extended configuration mode
Allocates resources for hardware components
Configures advanced features available through the chipset
Sets passwords and security features
Configures power management features
Selects boot options and power supply controls
For information about Refer to
Boot Integrity Services (BIS) Section 1.3, page 16
Saves or discards changes to Setup program options
NOTE
In this chapter, all examples of the BIOS Setup program menu bar include the maintenance menu; however, the maintenance menu is displayed only when the board is in configuration mode. Section 2.9 on page 68 tells how to put the board in configuration mode.
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Intel Desktop Board D850GB Technical Product Specification
Table 59 lists the function keys available for menu screens.
Table 59. BIOS Setup Program Function Keys
BIOS Setup Program Function Key Description
<> or <> Selects a different menu screen (Moves the cursor left or right) <> or <> Selects an item (Moves the cursor up or down) <Tab> Selects a field (Not implemented) <Enter> Executes command or selects the submenu <F9> Load the default configuration values for the current menu <F10> Save the current values and exits the BIOS Setup program <Esc> Exits the menu

4.2 Maintenance Menu

To access this menu, select Maintenance on the menu bar at the top of the screen.
Maintenance
Extended Configuration
The menu shown in Table 60 is for clearing Setup passwords and enabling extended configuration mode. Setup only displays this menu in configuration mode. See Section 2.9 on page 68 for configuration mode setting information.
Main Advanced Security Power Boot Exit
Table 60. Maintenance Menu
Feature Options Description
Clear All Passwords Yes (default)
No
Clear BIS Credentials Yes (default)
No
Extended Configuration
Scan User Flash Area
Fixed Disk Boot Sector
CPU Information No options Displays CPU Information. CPU Stepping
Signature
CPU Microcode Update Revision
Default (default)
User-Defined
Disabled
(default)
Enabled
Normal (default)
Write Protect
No options Displays CPU’s Stepping Signature.
No options Displays CPU’s Microcode Update Revision.
Clears the user and supervisor passwords.
Clears the Wired for Management Boot Integrity Service (BIS) credentials.
Invokes the Extended Configuration submenu.
Enables the BIOS to scan the flash memory for user binary files that are executed at boot time.
Write Protect prevents write operations to the IDE boot sector. Normal has no write protection and is used when formatting.
90
BIOS Setup Program

4.2.1 Extended Configuration Submenu

To access this submenu, select Maintenance on the menu bar, then Extended Configuration.
Maintenance
Extended Configuration
The submenu represented by Table 61 is for setting video memory cache mode. This submenu becomes available when User Defined is selected under Extended Configuration.
Table 61. Extended Configuration Submenu
Feature Options Description Extended Configuration • Default
Video Memory Cache Mode USWC
Main Advanced Security Power Boot Exit
User Defined allows setting memory control and video
(default)
User Defined
UC (default)
memory cache mode. If selected here, will also display in
the Advanced Menu as: “Extended Menu: Selects Uncacheable Speculative Write-Combining
(USWC) video memory cache mode. Full 32 byte contents of the Write Combining buffer are written to memory as required. Cache lookups are not performed. Both the video driver and the application must support Write Combining.
Selects UnCacheable (UC) video memory cache mode. This setting identifies the video memory range as uncacheable by the processor. Memory writes are performed in program order. Cache lookups are not performed. Well suited for applications not supporting Write Combining.
Used
.”
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Intel Desktop Board D850GB Technical Product Specification

4.3 Main Menu

To access this menu, select Main on the menu bar at the top of the screen.
Maintenance
Main
Table 62 describes the Main menu. This menu reports processor and memory information and is for configuring the system date and system time.
Table 62. Main Menu
Feature Options Description
BIOS Version No options Displays the version of the BIOS. Processor Type No options Displays processor type. Processor Speed No options Displays processor speed. System Bus Speed No options Displays the system bus speed. Cache RAM No options Displays the size of second-level cache and whether it is
Total Memory No options Displays the total amount of RAM. RIMM 1 RIMM 2 RIMM 3 RIMM 4 Language English (default)
Memory Configuration
System Time Hour, minute, and
System Date Day of week
No options Displays the amount and type of RAM in the memory
Deutsch
Français
Español
Portugues
Non-ECC
ECC (default)
second
Month/day/year
Advanced Security Power Boot Exit
ECC-capable.
banks.
Selects the current default language used by the BIOS.
Allows the user to enable error reporting if the system and all installed memory support ECC. If non-ECC memory is installed, BIOS will detect and change the setting to Non-ECC.
Specifies the current time.
Specifies the current date.
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BIOS Setup Program

4.4 Advanced Menu

To access this menu, select Advanced on the menu bar at the top of the screen.
Maintenance Main
Advanced
Boot Configuration
Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration
Table 63 describes the Advanced Menu. This menu is used for setting advanced features that are available through the chipset.
Table 63. Advanced Menu
Feature Options Description
Extended Configuration No options If
Boot Configuration Select to display
submenu
Peripheral Configuration Select to display
submenu
IDE Configuration Select to display
submenu
Diskette Configuration Select to display
submenu
Event Log Configuration Select to display
submenu
Video Configuration Select to display
submenu
Security Power Boot Exit
Used
is displayed,
Extended Configuration under the Maintenance Menu. Configures Plug and Play and the Numlock key, and resets
configuration data. When selected, displays the Boot Configuration submenu.
Configures peripheral ports and devices. When selected, displays the Peripheral Configuration submenu.
Specifies type of connected IDE devices.
When selected, displays the Diskette Configuration submenu.
Configures Event Logging. When selected, displays the Event Log Configuration submenu.
Configures video features. When selected, displays the Video Configuration submenu.
User-Defined
has been selected in
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Intel Desktop Board D850GB Technical Product Specification

4.4.1 Boot Configuration Submenu

To access this submenu, select Advanced on the menu bar, then Boot Configuration.
Maintenance Main
Advanced
Boot Configuration
Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration
The submenu represented by Table 64 is for setting Plug and Play options, resetting configuration data, and the power-on state of the Numlock key.
Table 64. Boot Configuration Submenu
Feature Options Description
Reset Config Data No (default)
Yes
Numlock Off
On (default)
Security Power Boot Exit
No
does not clear the PCI/PnP configuration data stored in
flash memory on the next boot.
Yes
clears the PCI/PnP configuration data stored in flash
memory on the next boot. Specifies the power-on state of the Numlock feature on the
numeric keypad of the keyboard.
94

4.4.2 Peripheral Configur ation Submenu

To access this submenu, select Advanced on the menu bar, then Peripheral Configuration.
Maintenance Main
Advanced
Boot Configuration
Peripheral Configuration
IDE Configuration Diskette Configuration Event Log Configuration Video Configuration
The submenu represented in Table 65 is used for configuring computer peripherals.
Table 65. Peripheral Configuration Submenu
Feature Options Description
Serial port A Disabled
Enabled
Auto (default)
Base I/O address (This feature is present only when Serial Port A is set to
Interrupt (This feature is present only when Serial Port A is set to
Parallel port Disabled
Mode Output Only
Enabled
Enabled
)
)
3F8 (default)
2F8
3E8
2E8
IRQ 3
IRQ 4
(default)
Enabled
Auto (default)
Bi-directional
EPP
ECP (default)
Security Power Boot Exit
Configures serial port A.
Auto
assigns the first free COM port, normally COM1, the
address 3F8h, and the interrupt IRQ4. An * (asterisk) displayed next to an address indicates a
conflict with another device. Specifies the base I/O address for serial port A, if serial port A
is Enabled.
Specifies the interrupt for serial port A, if serial port A is Enabled.
Configures the parallel port.
Auto
assigns LPT1 the address 378h and the interrupt IRQ7.
An * (asterisk) displayed next to an address indicates a conflict with another device.
Selects the mode for the parallel port. Not available if the parallel port is disabled.
Output Only Bi-directional EPP
bi-directional mode.
ECP
directional mode.
operates in AT†-compatible mode.
operates in PS/2-compatible mode.
is Extended Parallel Port mode, a high-speed
is Enhanced Capabilities Port mode, a high-speed bi-
BIOS Setup Program
continued
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Intel Desktop Board D850GB Technical Product Specification
Table 65. Peripheral Configuration Submenu (continued)
Feature Options Description
Base I/O address (This feature is present only when Parallel Port is set to
Interrupt (This feature is present only when Parallel Port is set to
DMA (This feature is present only when Parallel Port Mode is set to
Audio Device Disabled
LAN Device Disabled
Modem Device Disabled
Legacy USB Support Disabled
Enabled
Enabled
ECP
)
)
)
378 (default)
278
IRQ 5
IRQ 7
(default)
1
3 (default)
Enabled
(default)
Enabled (default)
Enabled (default)
Enabled (default)
Specifies the base I/O address for the parallel port.
Specifies the interrupt for the parallel port.
Specifies the DMA channel.
Enables or disables the onboard audio subsystem. For boards with no onboard audio subsystem, this option does not appear; however, this option does appear if a CNR card with an audio subsystem is installed.
Enables or disables the onboard LAN device. For boards with no onboard LAN audio subsystem, this option will not appear; however, this option does appear if a CNR card with a LAN subsystem is instal led.
Enables or disables a modem device on a CNR card. This option appears only when a CNR card with a modem is installed.
Enables or disables Legacy USB support.
96

4.4.3 IDE Configuration Submenu

To access this submenu, select Advanced on the menu bar, then IDE Configuration.
Maintenance Main
Advanced
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration Event Log Configuration Video Configuration
The menu represented in Table 66 is used to configure IDE device options.
Table 66. IDE Configuration Submenu
Feature Options Description
IDE Controller Disabled
Primary
Secondary
Both (default)
Hard Disk Pre-Delay Disabled (default)
3 Seconds
6 Seconds
9 Seconds
12 Seconds
15 Seconds
21 Seconds
30 Seconds
Primary IDE Master Select to display sub-
menu
Primary IDE Slave Select to display sub-
menu
Secondary IDE Master Select to display sub-
menu
Secondary IDE Slave Select to display sub-
menu
Security Power Boot Exit
Specifies the integrated IDE controller.
Primary Secondary Both
Specifies the hard disk drive pre-delay.
Reports type of connected IDE device. When selected, displays the Primary IDE Master submenu.
Reports type of connected IDE device. When selected, displays the Primary IDE Slave submenu.
Reports type of connected IDE device. When selected, displays the Secondary IDE Master submenu.
Reports type of connected IDE device. When selected, displays the Secondary IDE Slave submenu.
enables only the primary IDE controller.
enables only the secondary IDE controller.
enables both IDE controllers.
BIOS Setup Program
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Intel Desktop Board D850GB Technical Product Specification
4.4.3.1 Primary/Secondary IDE Master/Slave Submenus
To access these submenus, select Advanced on the menu bar, then IDE Configuration and then the master or slave to be configured.
Maintenance Main
Advanced
Boot Configuration
Peripheral Configuration
IDE Configuration Primary IDE Master Primary IDE Slave Secondary IDE Master Secondary IDE Slave
Diskette Configuration Event Log Configuration Video Configuration
There are four IDE submenus: primary master, primary slave, secondary master, and secondary slave. Table 67 shows the format of the IDE submenus. For brevity, only one example is shown.
Security Power Boot Exit
Table 67. Primary/Secondary IDE Master/Slave Submenus
Feature Options Description
Drive Installed No options Displays the type of drive installed. Type None
User
Auto (default)
CD-ROM
ATAPI Removable
Other ATAPI
IDE Removable
Maximum Capacity No options Displays the capacity of the drive. LBA Mode Control Disabled
Enabled (default)
Multi-Sector Transfers Disabled (default)
2 Sectors
4 Sectors
8 Sectors
16 Sectors
Specifies the IDE configuration mode for IDE devices.
User
allows capabilities to be changed.
Auto
fills-in capabilities from ATA/ATAPI device.
Enables or disables LBA mode control.
Specifies number of sectors per block for transfers from the hard disk drive to memory.
Check the hard disk drive’s specifications for optimum setting.
continued
98
BIOS Setup Program
Table 67. Primary/Secondary IDE Master/Slave Submenus (continued)
Feature Options Description
PIO Mode Auto (default)
0
1
2
3
4
Ultra DMA Disabled (default)
Mode 0
Mode 1
Mode 2
Mode 3
Mode 4
Cable Detected No options Displays the type of cable connected to the IDE
Specifies the PIO mode.
Specifies the Ultra DMA mode for the drive.
interface: 40-conductor or 80-conductor (for ATA-100 peripherals).
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Intel Desktop Board D850GB Technical Product Specification

4.4.4 Diskette Configuration Submenu

To access this menu, select Advanced on the menu bar, then Diskette Configuration.
Maintenance Main
Advanced
Boot Configuration
Peripheral Configuration IDE Configuration
Diskette Configuration
Event Log Configuration Video Configuration
The submenu represented by Table 68 is used for configuring the diskette drive.
Table 68. Diskette Configuration Submenu
Feature Options Description
Diskette Controller Disabled
Enabled (default)
Floppy A Not Installed
360 KB 5¼"
1.2 MB 5¼"
720 KB 3½"
1.44/1.25 MB 3½" (default)
2.88 MB 3½"
Diskette Write-Protect Disabled (default)
Enabled
Security Power Boot Exit
Disables or enables the integrated diskette controller.
Specifies the capacity and physical size of diskette drive A.
Disables or enables write-protect for the diskette drive.
100
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