Intel D845GRG Guide

Technical Product Specification
for Intel®Desktop Boards
using the Intel®845G Chipset
April 2002
Order Number: A81229-001
Intel®Desktop Boards using the Intel®845G Chipset 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 Specification Update for Intel Desktop Boards using the Intel 845G Chipset.

Revision History
Revision Revision History Date
-001 First release of the Technical Product Specification for Intel®Desktop
Boards using the Intel®845G Chipset.
April 2002
This product specification applies to only standard Intel Desktop Boards using the Intel 845G
Chipset with BIOS identifier RG84510.86A.
Changes to this specification will be published in the Specification Update for Intel Desktop
Boards using the Intel 845G Chipset before being incorporated into a revision of this document.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL®PRODUCTS. EXCEPT AS
PROVIDED IN INTEL’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY
WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE
OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR
PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT, OR OTHER INTELLECTUAL
PROPERTY RIGHT.
Intel Corporation may have patents or pending patent applications, trademarks, copyrights, or other intellectual property
rights that relate to the presented subject matter. The furnishing of documents and other materials and information does
not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other
intellectual property rights.
Intel products are not intended for use in medical, life saving, or life sustaining applications or for any other application in
which the failure of the Intel product could create a situation where personal injury or death may occur.
Intel may make changes to specifications, product descriptions, and plans at any time, without notice.
Intel Desktop Boards using the Intel 845G Chipset may contain design defects or errors known as errata that may cause
the product to deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.
Copies of documents which have an ordering 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.
Intel, Pentium, Celeron, and LANDesk are registered trademarks of Intel Corporation or its subsidiaries in the United States
and other countries.
†Other names and brands may be claimed as the property of others.
Copyright 2002, Intel Corporation. All rights reserved.

iii
Preface
This Technical Product Specification (TPS) describes the features common to Intel Desktop
Boards using the Intel 845G Chipset. This specification is to be used with Product Supplement
documents (available separately) that describe features unique to individual members of the
product family.
Intended Audience
The TPS is intended to provide detailed, technical information about Intel Desktop Boards using
the Intel 845G Chipset and their 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 these Intel Desktop boards
2 A description of the resources of the Desktop Boards
3 An overview of 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, and POST codes
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.
Footnotes, Notes, Integrator’s Notes, Cautions, and Warnings
Footnotes
Footnotes call attention to features that may not be standard or the implementation of which may
vary depending on the Intel Desktop Board being used. Chapter 1 of each Product Supplement
Document includes a footnote cross reference table.
✏ NOTE
Notes call attention to important information.

Technical Product Specification for Intel Desktop Boards using the Intel 845G Chipset
iv
# INTEGRATOR’S NOTES
Integrator’s notes are used to call attention to information that may be useful to system
integrators.
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.
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 Desktop boards, 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.

v
Contents
1Product Description
1.1 Overview ..................................................................................................................... 9
1.1.1 Feature Summary ......................................................................................... 9
1.1.2 Block Diagram..............................................................................................11
1.2 Online Support ...........................................................................................................12
1.3 Operating System Support .........................................................................................12
1.4 Design Specifications .................................................................................................13
1.5 Processor ...................................................................................................................17
1.6 System Memory .........................................................................................................18
1.7 Intel®845G Chipset....................................................................................................20
1.7.1 Intel 845G Graphics Subsystem...................................................................20
1.7.2 USB..............................................................................................................26
1.7.3 IDE Support .................................................................................................26
1.7.4 Real-Time Clock, CMOS SRAM, and Battery...............................................27
1.8 I/O Controller ..............................................................................................................27
1.8.1 Serial Port ....................................................................................................28
1.8.2 Parallel Port..................................................................................................28
1.8.3 Diskette Drive Controller ..............................................................................28
1.8.4 Keyboard and Mouse Interface ....................................................................28
1.9 Audio Subsystem........................................................................................................28
1.9.1 Audio Connectors.........................................................................................29
1.9.2 Audio Subsystem Software ..........................................................................29
1.10 LAN Subsystem..........................................................................................................30
1.10.1 Intel®82562ET Platform LAN Connect Device.............................................30
1.10.2 RJ-45 LAN Connector with Integrated LEDs ................................................30
1.10.3 LAN Subsystem Software ............................................................................31
1.11 CNR .....................................................................................................................31
1.12 Hardware Management Subsystem............................................................................32
1.12.1 Hardware Monitoring ASICs.........................................................................32
1.12.2 Fan Monitoring .............................................................................................33
1.12.3 Chassis Intrusion and Detection...................................................................33
1.13 Power Management ...................................................................................................34
1.13.1 ACPI.............................................................................................................34
1.13.2 Hardware Support ........................................................................................36
2Technical Reference
2.1 Introduction.................................................................................................................41
2.2 Memory Map ..............................................................................................................41
2.3 Fixed I/O Map.............................................................................................................42
2.4 DMA Channels ...........................................................................................................43
2.5 PCI Configuration Space Map ....................................................................................43
2.6 Interrupts ....................................................................................................................44
2.7 PCI Interrupt Routing Map..........................................................................................45
2.8 Environmental ............................................................................................................47

Technical Product Specification for Intel Desktop Boards using the Intel 845G Chipset
vi
3BIOS Overview
3.1 Introduction.................................................................................................................49
3.2 BIOS Flash Memory Organization ..............................................................................49
3.3 Resource Configuration..............................................................................................49
3.3.1 PCI Autoconfiguration ..................................................................................49
3.3.2 PCI IDE Support...........................................................................................50
3.4 System Management BIOS (SMBIOS).......................................................................50
3.5 Legacy USB Support ..................................................................................................51
3.6 BIOS Updates ............................................................................................................52
3.6.1 Language Support........................................................................................52
3.6.2 Custom Splash Screen.................................................................................52
3.7 Recovering BIOS Data ...............................................................................................53
3.8 Boot Options...............................................................................................................53
3.8.1 CD-ROM Boot..............................................................................................53
3.8.2 Network Boot................................................................................................54
3.8.3 Booting Without Attached Devices ...............................................................54
3.8.4 Changing the Default Boot Device During POST..........................................54
3.9 Fast Booting Systems with Intel®Rapid BIOS Boot....................................................54
3.9.1 Peripheral Selection and Configuration ........................................................54
3.9.2 Intel Rapid BIOS Boot ..................................................................................55
3.10 BIOS Security Features..............................................................................................55
4BIOS Setup Program
4.1 Introduction.................................................................................................................57
4.2 Maintenance Menu .....................................................................................................58
4.3 Main Menu..................................................................................................................59
4.4 Advanced Menu..........................................................................................................60
4.4.1 PCI Configuration Submenu.........................................................................61
4.4.2 Boot Configuration Submenu .......................................................................63
4.4.3 Peripheral Configuration Submenu...............................................................64
4.4.4 IDE Configuration Submenu.........................................................................66
4.4.5 Diskette Configuration Submenu..................................................................69
4.4.6 Event Log Configuration Submenu...............................................................70
4.4.7 Video Configuration Submenu......................................................................71
4.4.8 USB Configuration Submenu .......................................................................72
4.4.9 Chipset Configuration Submenu...................................................................73
4.5 Security Menu ............................................................................................................75
4.6 Power Menu ...............................................................................................................76
4.6.1 ACPI Submenu ............................................................................................76
4.7 Boot Menu..................................................................................................................77
4.7.1 Boot Device Priority Submenu......................................................................78
4.7.2 Hard Disk Drives Submenu ..........................................................................79
4.7.3 Removable Devices Submenu .....................................................................79
4.7.4 ATAPI CD-ROM Drives Submenu................................................................80
4.8 Exit Menu ...................................................................................................................80

Contents
vii
5Error Messages and Beep Codes
5.1 BIOS Error Messages.................................................................................................81
5.2 Port 80h POST Codes................................................................................................83
5.3 Bus Initialization Checkpoints .....................................................................................87
5.4 Speaker .....................................................................................................................88
5.5 BIOS Beep Codes ......................................................................................................88
Figures
1. Block Diagram................................................................................................................11
Tables
1. Feature Summary........................................................................................................ 9
2. Specifications .............................................................................................................13
3. Supported DDR DIMM Configurations........................................................................19
4. Supported SDR DIMM Configurations ........................................................................19
5. Direct Draw Supported Modes....................................................................................21
6. Video BIOS Video Modes Supported for Analog CRTs...............................................22
7. Supported Configuration Modes .................................................................................23
8. Details of bpp Configuration Modes............................................................................24
9. LAN Connector LED States ........................................................................................30
10. Effects of Pressing the Power Switch .........................................................................34
11. Power States and Targeted System Power ................................................................35
12. Wake-up Devices and Events.....................................................................................36
13. Fan Connector Function/Operation for Desktop Boards with a Hardware
Monitoring ASIC .........................................................................................................37
14. Fan Connector Function/Operation for Desktop Boards with a Hardware
Monitoring and Fan Control ASIC...............................................................................38
15. System Memory Map..................................................................................................41
16. Fixed I/O Map.............................................................................................................42
17. DMA Channels ...........................................................................................................43
18. PCI Configuration Space Map ....................................................................................43
19. Interrupts ....................................................................................................................44
20. PCI Interrupt Routing Map..........................................................................................46
21. Desktop Board Environmental Specifications .............................................................47
22. Boot Device Menu Options.........................................................................................54
23. Supervisor and User Password Functions ..................................................................56
24. BIOS Setup Program Menu Bar .................................................................................57
25. BIOS Setup Program Function Keys ..........................................................................57
26. Maintenance Menu .....................................................................................................58
27. Main Menu..................................................................................................................59
28. Advanced Menu..........................................................................................................60
29. PCI Configuration Submenu .......................................................................................61
30. Boot Configuration Submenu......................................................................................63
31. Peripheral Configuration Submenu.............................................................................64
32. IDE Configuration Submenu .......................................................................................66
33. Primary/Secondary IDE Master/Slave Submenus.......................................................67

Technical Product Specification for Intel Desktop Boards using the Intel 845G Chipset
viii
34. Diskette Configuration Submenu ................................................................................69
35. Event Log Configuration Submenu .............................................................................70
36. Video Configuration Submenu....................................................................................71
37. USB Configuration Submenu......................................................................................72
38. Chipset Configuration Submenu .................................................................................73
39. Security Menu ............................................................................................................75
40. Power Menu ...............................................................................................................76
41. ACPI Submenu...........................................................................................................76
42. Boot Menu..................................................................................................................77
43. Boot Device Priority Submenu....................................................................................78
44. Hard Disk Drives Submenu ........................................................................................79
45. Removable Devices Submenu....................................................................................79
46. ATAPI CD-ROM Drives Submenu ..............................................................................80
47. Exit Menu ...................................................................................................................80
48. BIOS Error Messages.................................................................................................81
49. Uncompressed INIT Code Checkpoints......................................................................83
50. Boot Block Recovery Code Checkpoints ....................................................................83
51. Runtime Code Uncompressed in F000 Shadow RAM ................................................84
52. Bus Initialization Checkpoints .....................................................................................87
53. Upper Nibble High Byte Functions..............................................................................87
54. Lower Nibble High Byte Functions..............................................................................88
55. Beep Codes................................................................................................................89

9
1 Product Description
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the major features.
Table 1. Feature Summary
Form Factors1• ATX
• microATX
Processor • Support for an Intel®Pentium®4 processor in a µPGA478 socket with a
400/533 MHz system bus
• Support for an Intel®Celeron®processor in a µPGA478 socket with a 400 MHz
system bus
Memory2• Two DIMM sockets supporting one of the following:
−2.5 V (only) 184-pin 200/266 MHz Double Data Rate (DDR) SDRAM DIMMs
with gold-plated contacts
−3.3 V (only) 168-pin 133 MHz Single Data Rate (SDR) SDRAM DIMMs with
gold-plated contacts
• Support for up to 2 GB system memory
NOTE: Desktop Boards using the Intel®845G Chipset have been designed to
support DIMMs based on 512 Mbit technology for a maximum onboard
capacity of up to 2 GB, but this technology has not been validated.
Chipset Intel 845G Chipset, consisting of:
• Intel®82845G Graphics and Memory Controller Hub (GMCH)
• Intel®82801DB I/O Controller Hub (ICH4)
• 4 Mbit Firmware Hub (FWH)
Audio3Audio subsystem for AC ‘97 processing using the Analog Devices AD1981A codec
continued
1Form factors are product-dependent. For more information, refer to the Product Supplement Document for
your Desktop Board.
2Memory support (DDR SDRAM or SDR SDRAM) is product-dependent. For more information, refer to the
Product Supplement Document for your Desktop Board.
3Contact your Intel sales representative to determine if the audio subsystem is present on your Intel
Desktop Board.

Technical Product Specification for Intel Desktop Boards using the Intel 845G Chipset
10
Table 1. Feature Summary (continued)
I/O Control LPC Bus I/O controller (SMSC LPC47M172 or National Semiconductor PC87372)
Video • Intel®Extreme Graphics controller
• AGP connector supporting 1x, 2x, and 4x AGP cards (1.5 V only) or an AGP
Digital Display (ADD) card
• Integrated retention mechanism
Peripheral
Interfaces
• Up to six USB ports
• One serial port
• One parallel port
• Two IDE interfaces with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2†keyboard and mouse ports
• Three fan connectors
Hardware
Management
Subsystem4
• Voltage sense to detect out of range power supply voltages
• Thermal sense to detect out of range thermal values
• Two fan sense inputs used to monitor fan activity
• Fan speed control
• Chassis intrusion detection
• Hardware management ASIC
CNR5One Communication and Networking Riser (CNR) connector
LAN5Intel®82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device
Instantly Available
PC Technology
• Support for PCI Local Bus Specification Revision 2.2
• Suspend to RAM support
• Wake on PCI, CNR, RS-232, front panel, PS/2 devices, and USB ports
For information about Refer to
The board’s compliance level with ACPI, Plug and Play, and SMBIOS Section 1.4, page 13
Available configurations for Intel Desktop Boards using the Intel 845G Chipset Section 1.2, page 12
✏ NOTE
The LAN and the CNR features are mutually exclusive.
4Contact your Intel sales representative to determine which type of hardware monitoring ASIC is present on
your Intel Desktop Board.
5The CNR connector and the LAN subsystem are mutually exclusive features. Contact your Intel sales
representative to determine which of these features is present on your Intel Desktop Board.