Intel® Desktop Board
D845GVFN
Technical Product Specification
The Intel® Desktop Board D845GVFN 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 D845GVFN Specification Update.
August 2004
Order Number: C83644-001
Revision History
Revision Revision History Date
-001 First release of the Intel® Desktop Board D845GVFN Technical Product
Specification.
August 2004
This product specification applies to only standard Intel
®
Desktop Board D845GVFN with BIOS
identifier FN84510A.86A.
Changes to this specification will be published in the Intel Desktop Board D845GVFN
Specification Update 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.
The Intel
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, and Celeron 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 © 2004, Intel Corporation. All rights reserved.
®
Desktop Board D845GVFN may contain design defects or errors known as errata that may cause the product to
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
®
power and environmental requirements, and the BIOS for the Intel
describes the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Board
D845GVFN 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 the Desktop Board D845GVFN
2 A map of the resources of the desktop board
3 The features supported by the BIOS Setup program
4 A description of the BIOS error messages, beep codes, and POST codes
Desktop Board D845GVFN. It
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.
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.
iii
Intel Desktop Board D845GVFN 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 Desktop Board D845GVFN, 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......................................................................................................................10
1.1.1 Feature Summary..........................................................................................10
1.1.2 Manufacturing Options ..................................................................................11
1.1.3 Board Layout.................................................................................................12
1.2 Block Diagram..............................................................................................................13
1.3 Online Support.............................................................................................................14
1.4 Operating System Support...........................................................................................14
1.5 Design Specifications...................................................................................................15
1.6 Processor.....................................................................................................................18
1.7 System Memory...........................................................................................................19
1.8 Intel® 845GV Chipset...................................................................................................21
1.8.1 Intel® Extreme Graphics Controller................................................................21
1.8.2 USB...............................................................................................................26
1.8.3 IDE Interfaces................................................................................................26
1.8.4 Real-Time Clock, CMOS SRAM, and Battery................................................27
1.9 I/O Controller................................................................................................................28
1.9.1 Serial Ports....................................................................................................28
1.9.2 Parallel Port...................................................................................................28
1.9.3 Diskette Drive Controller................................................................................28
1.9.4 Keyboard and Mouse Interface .....................................................................28
1.10 Audio Subsystem.........................................................................................................29
1.10.1 Audio Connectors..........................................................................................29
1.10.2 Audio Subsystem Software ...........................................................................30
1.11 LAN Subsystem (Optional)...........................................................................................30
1.11.1 Intel® 82562ET Platform LAN Connect Device..............................................30
1.11.2 RJ-45 LAN Connector with Integrated LEDs.................................................31
1.11.3 LAN Subsystem Software..............................................................................31
1.12 Hardware Management Subsystem (Optional)............................................................31
1.12.1 Hardware Monitoring and Fan Control ASIC.................................................31
1.12.2 Fan Monitoring...............................................................................................32
1.12.3 Chassis Intrusion and Detection....................................................................32
1.13 Power Management.....................................................................................................32
1.13.1 ACPI..............................................................................................................32
1.13.2 Hardware Support .........................................................................................35
2 Technical Reference
2.1 Introduction ..................................................................................................................39
2.2 Memory Map................................................................................................................39
2.3 Fixed I/O Map...............................................................................................................40
2.4 DMA Channels.............................................................................................................41
2.5 PCI Configuration Space Map......................................................................................41
2.6 Interrupts......................................................................................................................42
2.7 PCI Interrupt Routing Map ...........................................................................................43
v
Intel Desktop Board D845GVFN Technical Product Specification
2.8 Connectors...................................................................................................................45
2.8.1 Back Panel Connectors.................................................................................46
2.8.2 Internal I/O Connectors .................................................................................47
2.8.3 External I/O Connectors................................................................................52
2.9 Jumper Blocks..............................................................................................................56
2.9.1 Front Panel Audio Connector/Jumper Block .................................................56
2.9.2 BIOS Setup Configuration Jumper Block ......................................................57
2.10 Mechanical Considerations..........................................................................................58
2.10.1 I/O Shield.......................................................................................................59
2.11 Electrical Considerations..............................................................................................60
2.11.1 DC Loading....................................................................................................60
2.11.2 Add-in Board Considerations.........................................................................60
2.11.3 Fan Connector Current Capability.................................................................60
2.11.4 Power Supply Considerations .......................................................................61
2.12 Thermal Considerations...............................................................................................61
2.13 Reliability......................................................................................................................63
2.14 Environmental..............................................................................................................63
2.15 Regulatory Compliance................................................................................................64
2.15.1 Safety Regulations ........................................................................................64
2.15.2 EMC Regulations...........................................................................................64
2.15.3 European Union Declaration of Conformity Statement..................................65
2.15.4 Product Ecology Statements.........................................................................65
2.15.5 Product Certification Markings (Board Level)................................................66
3 Overview of BIOS Features
3.1 Introduction ..................................................................................................................67
3.2 BIOS Flash Memory Organization ...............................................................................68
3.3 Resource Configuration ...............................................................................................68
3.3.1 PCI Autoconfiguration....................................................................................68
3.3.2 PCI IDE Support............................................................................................69
3.4 System Management BIOS (SMBIOS) ........................................................................69
3.5 Legacy USB Support....................................................................................................70
3.6 BIOS Updates..............................................................................................................70
3.6.1 Language Support.........................................................................................71
3.6.2 Custom Splash Screen..................................................................................71
3.7 Boot Options ................................................................................................................71
3.7.1 CD-ROM Boot ...............................................................................................71
3.7.2 Network Boot.................................................................................................71
3.7.3 Booting Without Attached Devices................................................................72
3.7.4 Changing the Default Boot Device During POST..........................................72
3.8 Fast Booting Systems with Intel® Rapid BIOS Boot.....................................................73
3.8.1 Peripheral Selection and Configuration.........................................................73
3.8.2 Intel Rapid BIOS Boot ...................................................................................73
3.9 BIOS Security Features ...............................................................................................74
vi
4 Error Messages and Beep Codes
4.1 BIOS Error Messages..................................................................................................75
4.2 Port 80h POST Codes .................................................................................................77
4.3 Bus Initialization Checkpoints ......................................................................................81
4.4 Speaker ....................................................................................................................... 82
4.5 BIOS Beep Codes........................................................................................................82
Figures
1. Desktop Board D845GVFN Components ....................................................................12
2. Block Diagram..............................................................................................................13
3. Location of the Standby Power Indicator LED on the D845GVFN Board ....................38
4. Back Panel Connectors................................................................................................46
5. Audio, Power, and Hardware Control Connectors.......................................................48
6. Add-in Board and Peripheral Interface Connectors .....................................................51
7. External I/O Connectors...............................................................................................52
8. Connection Diagram for Front Panel Connector..........................................................53
9. Connection Diagram for Front Panel USB Connector..................................................55
10. Location of the Jumper Blocks.....................................................................................56
11. Desktop Board Dimensions..........................................................................................58
12. I/O Shield Dimensions..................................................................................................59
13. Localized High Temperature Zones.............................................................................62
Contents
Tables
1. Feature Summary ........................................................................................................10
2. Manufacturing Options.................................................................................................11
3. Specifications...............................................................................................................15
4. Supported System Bus Frequency and Memory Speed Combinations.......................19
5. Supported DDR DIMM Configurations.........................................................................20
6. Direct Draw Supported Modes.....................................................................................22
7. Video BIOS Video Modes Supported for Analog CRTs ...............................................23
8. Supported Configuration Modes ..................................................................................24
9. Details of bpp Configuration Modes.............................................................................25
10. LAN Connector LED States .........................................................................................31
11. Effects of Pressing the Power Switch ..........................................................................33
12. Power States and Targeted System Power.................................................................34
13. Wake-up Devices and Events......................................................................................34
14. Fan Connector Function/Operation..............................................................................36
15. System Memory Map ...................................................................................................39
16. I/O Map ........................................................................................................................40
17. DMA Channels.............................................................................................................41
18. PCI Configuration Space Map......................................................................................41
19. Interrupts......................................................................................................................42
20. PCI Interrupt Routing Map ...........................................................................................44
21. Front Panel Audio Connector.......................................................................................49
22. Auxiliary Line In Connector (Optional) .........................................................................49
23. ATAPI CD-ROM Connector (Optional).........................................................................49
24. ATX12V Power Connector...........................................................................................49
25. Rear Chassis Fan Connector.......................................................................................50
vii
Intel Desktop Board D845GVFN Technical Product Specification
26. Processor Fan Connector............................................................................................50
27. Main Power Connector.................................................................................................50
28. Front Chassis Fan Connector......................................................................................50
29. Chassis Intrusion Connector (Optional).......................................................................50
30. Serial Port B Connector (optional) ...............................................................................52
31. Auxiliary Front Panel Power/Sleep LED Connector.....................................................53
32. Front Panel Connector.................................................................................................53
33. States for a One-Color Power LED..............................................................................54
34. States for a Two-Color Power LED..............................................................................54
35. Front Panel Audio Connector/Jumper Block................................................................57
36. BIOS Setup Configuration Jumper Settings.................................................................57
37. DC Loading Characteristics .........................................................................................60
38. Fan Connector Current Capability................................................................................60
39. Thermal Considerations for Components ....................................................................62
40. Desktop Board D845GVFN Environmental Specifications...........................................63
41. Safety Regulations.......................................................................................................64
42. EMC Regulations.........................................................................................................64
43. Product Certification Markings.....................................................................................66
44. BIOS Setup Program Menu Bar...................................................................................68
45. BIOS Setup Program Function Keys............................................................................68
46. Boot Device Menu Options ..........................................................................................72
47. Supervisor and User Password Functions...................................................................74
48. BIOS Error Messages..................................................................................................75
49. Uncompressed INIT Code Checkpoints.......................................................................77
50. Boot Block Recovery Code Checkpoints .....................................................................77
51. Runtime Code Uncompressed in F000 Shadow RAM.................................................78
52. Bus Initialization Checkpoints ......................................................................................81
53. Upper Nibble High Byte Functions...............................................................................81
54. Lower Nibble High Byte Functions...............................................................................82
55. Beep Codes .................................................................................................................83
viii
1 Product Description
What This Chapter Contains
1.1 Overview......................................................................................................................10
1.2 Block Diagram..............................................................................................................13
1.3 Online Support.............................................................................................................14
1.4 Operating System Support...........................................................................................14
1.5 Design Specifications...................................................................................................15
1.6 Processor.....................................................................................................................18
1.7 System Memory...........................................................................................................19
1.8 Intel® 845GV Chipset...................................................................................................21
1.9 I/O Controller................................................................................................................28
1.10 Audio Subsystem.........................................................................................................29
1.11 LAN Subsystem (Optional)...........................................................................................30
1.12 Hardware Management Subsystem (Optional)............................................................31
1.13 Power Management.....................................................................................................32
9
Intel Desktop Board D845GVFN Technical Product Specification
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the major features of the Intel® Desktop Board D845GVFN.
Table 1. Feature Summary
Form Factor
Processor
Memory
Chipset
Video
Audio
I/O Control
USB
Peripheral
Interfaces
Expansion
Capabilities
BIOS
Instantly Available
PC Technology
microATX (9.20 inches by 8.20 inches [233.68 millimeters by 208.28 millimeters])
• Support for an Intel
400/533 MHz system bus
• Support for an Intel
400 MHz system bus
• Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for single-sided or double-sided DIMMs (DDR333/266/200)
• Support for up to 2 GB system memory
®
Intel
845GV Chipset, consisting of:
®
• Intel
• Intel
• 3 Mbit Firmware Hub (FWH)
Intel
Audio subsystem for AC ‘97 processing using the Realtek ALC202A codec
SMSC LPC47M172 LPC Bus I/O controller or National Semiconductor PC87372
LPC Bus I/O controller
Support for USB 2.0 devices
• Up to four 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
Three PCI bus add-in card connectors (SMBus routed to PCI bus connector 2)
• Intel/AMI BIOS (resident in the 3 Mbit FWH)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
• Support for PCI Local Bus Specification Revision 2.2
• Suspend to RAM support
• Wake on PCI, RS-232, front panel, PS/2 devices, and USB ports
82845GV Graphics and Memory Controller Hub (GMCH)
®
82801DB I/O Controller Hub (ICH4)
®
Extreme Graphics controller
and SMBIOS
®
Pentium® 4 processor in an mPGA478 socket with a
®
Celeron® processor in an mPGA478 socket with a
10
1.1.2 Manufacturing Options
Table 2 describes the manufacturing options on the Desktop Board D845GVFN. 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
®
LAN
Hardware Monitor
Subsystem
Serial Port B
ATAPI-style audio
connectors
For information about Refer to
The board’s compliance level with ACPI, Plug and Play, and SMBIOS Section 1.5, page 15
Available configurations for the Desktop Board D845GVFN Section 1.3, page 14
82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device
Intel
• Hardware monitoring and fan control ASIC
• Three fan sense inputs used to monitor fan activity
• Chassis intrusion detection
• Connector for a second serial port
Two ATAPI-style audio connectors:
• Auxiliary line input
• ATAPI CD-DROM
Product Description
11
Intel Desktop Board D845GVFN Technical Product Specification
1.1.3 Board Layout
Figure 1 shows the location of the major components on the Desktop Board D845GVFN.
BB
AA
A
C D
B
E
F
G
H
I
Z
Y
J
K
X
L
W
UMONQRSTPV
OM17296
Item Description Item Description
A Audio codec O Diskette drive connector
B Intel 82562ET 10/100 Mbit/sec (PLC) device
(optional)
C Auxiliary line-in connector (optional) Q Speaker
D ATAPI CD-ROM connector (optional) R Battery
E Back panel connectors S Auxiliary front panel power LED connector
F +12V power connector (ATX12V) T Front chassis fan connector
G Rear chassis fan connector U Chassis intrusion connector (optional)
H Intel 82845GV GMCH V BIOS Setup configuration jumper block
I mPGA478 processor socket W 3 Mbit Firmware Hub (FWH)
J Processor fan connector X Front panel connector
K DIMM sockets Y Front panel USB connector
L Serial Port B connector (optional) Z Intel 82801DB I/O Controller Hub (ICH4)
M I/O Controller AA PCI bus add-in card connectors
N Power connector BB Front panel audio connector
Figure 1. Desktop Board D845GVFN Components
P IDE connectors
12
1.2 Block Diagram
Figure 2 is a block diagram of the major functional areas of the board.
= connector or socket
USB
Product Description
Back Panel /
Front Panel
USB Ports
Primary/
Secondary IDE
mPGA478
Processor Socket
VGA Port
DIMM Banks (2)
UDMA 33 and
System Bus
(400/533 MHz)
Intel 82845GV
Graphics and
Memory Controller
Hub (GMCH)
Display
Interface
Memory Bus
ATA-66/100
SMBus
AHA
Bus
LPC Bus
I/O
Controller
SMBus
Intel 82801DB
I/O Controller Hub
(ICH4)
CSMA/CD
AC Link
(Optional)
LPC
Bus
Unit
Interface
Physical
Layer
Interface
Serial Ports
Parallel Port
PS/2 Mouse
PS/2 Keyboard
Diskette Drive
Connector
3 Mbit
Firmware Hub
(FWH)
Intel 845GV Chipset
LAN
Connector
(optional)
PCI Bus
PCI Slot 1
PCI Slot 2
PCI Slot 3
SMBus
Figure 2. Block Diagram
13
Realtek
ALC202A
Audio
Codec
Line In
Line Out
Mic In
Auxiliary Line In (optional)
CD-ROM (optional)
OM17285
Intel Desktop Board D845GVFN Technical Product Specification
1.3 Online Support
To find information about… Visit this World Wide Web site:
Intel Desktop Board D845GVFN under
“Desktop Board Products” or “Desktop
Board Support”
Available configurations for the Desktop
Board D845GVFN
Processor data sheets http://www.intel.com/design/litcentr
ICH4 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://developer.intel.com/design/motherbd/fn/fn_available.htm
1.4 Operating System Support
The Desktop Board D845GVFN supports drivers for all of the onboard hardware and subsystems
under the following operating systems:
• Windows* XP
• Windows ME
• Windows 2000
• Microsoft Windows 98 SE
For information about Refer to
Supported drivers Section 1.3
NOTE
Third party vendors may offer other drivers.
14
1.5 Design Specifications
Table 3 lists the specifications applicable to the Desktop Board D845GVFN.
Table 3. Specifications
Reference
Name
AC ’97
ACPI
ASF
ATA/
ATAPI-5
ATX
ATX12V
BIS
DDR
SDRAM
Specification
Title
Audio Codec ’97
Advanced Configuration and
Power Interface
Specification
Alert Standard Format (ASF)
Specification
Information Technology-AT
Attachment with Packet
Interface - 5 (ATA/ATAPI-5)
ATX Specification
ATX/ATX12V Power Supply
Design Guide
Boot Integrity Services (BIS)
Application Programming
Interface (API)
Double Data Rate (DDR)
SDRAM Specification
Design Specification for a
184 Pin DDR Unbuffered
DIMM
Intel ® JEDEC DDR 200/266
Unbuffered DIMM
Specification Addendum
Version, Revision Date,
and Ownership
Revision 2.2,
September 2000,
Intel Corporation.
Version 1.0b,
February 08, 1999,
Intel Corporation,
Microsoft Corporation, and
Toshiba Corporation.
Version 1.03,
June 20, 2001,
DMTF,
Intel Corporation.
Revision 3,
February 29, 2000,
Contact: T13 Chair,
Seagate Technology.
Version 2.03,
December 1998,
Intel Corporation.
Version 1.2,
August 2000,
Intel Corporation.
Version 1.0,
August 4, 1999,
Intel Corporation.
Version 1.0,
June 2000,
JEDEC Solid State
Technology Association.
Revision 1.0,
October 2001,
JEDEC Solid State
Technology Association.
Revision 0.9,
September 27, 2001,
Intel Corporation.
Product Description
The information is
available from…
ftp://download.intel.com/labs/
media/audio/download/ac97r2
2.pdf
http://www.acpi.info/spec10b.
htm
http://www.dmtf.org/standards
/documents/ASF/DSP0114.pd
f
http://www.t13.org
http://www.formfactors.org/de
veloper/specs/atx/atxspecs.ht
m
http://www.formfactors.org/de
veloper/specs/atx/atxspecs.ht
m
http://www.intel.com/labs/man
age/wfm/wfmspecs.htm
http://www.jedec.org/
http://www.jedec.org/
http://developer.intel.com/tech
nology/memory/index.htm
continued
15
Intel Desktop Board D845GVFN Technical Product Specification
Table 3. Specifications (continued)
Reference
Name
EHCI
EPP
El Torito
LPC
MicroATX
PCI
Plug and
Play
PXE
SFX
Specification
Title
Enhanced Host
Controller Interface
Specification for
Universal Serial Bus
IEEE Std 1284.1-1997
(Enhanced Parallel Port)
Bootable CD-ROM
Format Specification
Low Pin Count Interface
Specification
microATX Motherboard
Interface Specification
PCI Local Bus
Specification
PCI Bus Power
Management Interface
Specification
Plug and Play BIOS
Specification
Preboot Execution
Environment
SFX/SFX12V Power
Supply Design Guide
Version, Revision Date and
Ownership
Revision 1.0,
March 12, 2002,
Intel Corporation.
Version 1.7,
1997,
Institute of Electrical and
Electronic Engineers.
Version 1.0,
January 25, 1995,
Phoenix Technologies Limited
and International Business
Machines Corporation.
Revision 1.0,
September 29, 1997,
Intel Corporation.
Version 1.0,
December 1997,
Intel Corporation.
Revision 2.2,
December 18, 1998,
PCI Special Interest Group.
Revision 1.1,
December 18, 1998,
PCI Special Interest Group.
Version 1.0a,
May 5, 1994,
Compaq Computer Corporation,
Phoenix Technologies Limited,
and Intel Corporation.
Version 2.1,
September 20, 1999,
Intel Corporation.
Version 2.0,
May 2001,
Intel Corporation.
The information is
available from…
http://developer.intel.com/te
chnology/usb/download/ehc
i-r10.pdf
http://standards.ieee.org/re
ading/ieee/std_public/descri
ption/busarch/1284.11997_desc.html
http://www.phoenix.com/res
ources/specs-cdrom.pdf
http://www.intel.com/design
/chipsets/industry/lpc.htm
http://www.formfactors.org/
developer/specs/microatx/
microatx.htm
http://www.pcisig.com/speci
fications
http://www.pcisig.com/speci
fications
http://www.microsoft.com/h
wdev/tech/PnP/default.asp
ftp://download.intel.com/lab
s/manage/wfm/download/
/pxespec.pdf
http://www.formfactors.org/
developer/specs/sfx/sfx12v.
pdf
continued
16
Table 3. Specifications (continued)
Reference
Name
SMBIOS
TFX12V
UHCI
USB
Specification
Title
System Management
BIOS
TFX12V Power Supply
Design Guide
Universal Host Controller
Interface Design Guide
Universal Serial Bus
Specification
Version, Revision Date
and Ownership
Version 2.3.1,
March 16, 1999,
American Megatrends
Incorporated,
Award Software International
Incorporated,
Compaq Computer Corporation,
Dell Computer Corporation,
Hewlett-Packard Company,
Intel Corporation,
International Business Machines
Corporation,
Phoenix Technologies Limited,
and SystemSoft Corporation.
Revision 1.01,
May 2002
Intel Corporation
Revision 1.1,
March 1996,
Intel Corporation.
Revision 2.0,
April 27, 2000,
Compaq Computer Corporation,
Hewlett-Packard Company,
Lucent Technologies Inc.,
Intel Corporation,
Microsoft Corporation,
NEC Corporation, and
Koninklijke Philips Electronics
N.V.
Product Description
The information is
available from…
http://www.dmtf.org/downlo
ad/standards/DSP0119.pdf
http://www.formfactors.org/
developer/specs/tfx12v/tfx1
2v_psdg_101.pdf
http://developer.intel.com/d
esign/USB/UHCI11D.htm
http://www.usb.org/develop
ers/docs.html
WfM
Wired for Management
Baseline
Version 2.0,
December 18, 1998,
Intel Corporation.
http://www.intel.com/labs/m
anage/wfm/wfmspecs.htm
17
Intel Desktop Board D845GVFN Technical Product Specification
1.6 Processor
NOTE
Refer to Thermal Considerations (Section 2.12, page 61) for important information when using an
Intel Pentium 4 processor operating above 2.80 GHz with this Intel desktop board.
The board is designed to support the following:
• Intel Pentium 4 processors in an mPGA478 processor socket with a 533/400 MHz system bus
• Intel Celeron processors in an mPGA478 processor socket with a 400 MHz system bus
See the Intel web site listed below for the most up-to-date list of supported processors.
For information about… Refer to:
Supported processors for the D845GVFN board http://www.intel.com/design/motherbd/fn/fn_proc.htm
CAUTION
Use only the processors listed on web site above. Use of unsupported processors can damage the
board, the processor, and the power supply.
INTEGRATOR’S NOTES
• Use only ATX12V-, SFX12V-, or TFX12V-compliant power supplies with the Desktop Board
D845GVFN. ATX12V, SFX12V, and TFX12V power supplies have an additional power lead
that provides required supplemental power for the processor. Always connect the 20-pin and
4-pin leads of ATX12V, SFX12V, and TFX12V power supplies to the corresponding connectors
on the desktop board, otherwise the board will not boot.
• Do not use a standard ATX power supply. The board will not boot with a standard ATX power
supply.
• Refer to Table 4 on page 19 for a list of supported system bus frequency and memory speed
combinations.
For information about Refer to
Power supply connectors Section 2.8.2.2, page 48
18
1.7 System Memory
The Desktop Board D845GVFN has two DIMM sockets and supports the following memory
features:
• 2.5 V (only) 184-pin DDR SDRAM DIMMs with gold-plated contacts
• Unbuffered single-sided or double-sided DIMMs
• Maximum to tal system me mory: 2 GB; minimum total system memory: 64 MB
• DDR333/266/200 MHz SDRAM DIMMs only
• Serial Presence Detect (SPD)
• Suspend to RAM
Table 4 lists the supported system bus frequency and memory speed combinations.
Table 4. Supported System Bus Frequency and Memory Speed Combinations
If the processor's system bus frequency is… You can use this type of DIMM…
533 MHz DDR333 or DDR266
400 MHz DDR266 or DDR200
Product Description
CAUTION
Do not use ECC DIMMs with this board. Using ECC DIMMs could damage the board.
INTEGRATOR’S NOTES
• Registered DIMMs are not supported.
• Double-sided x16 DIMMs are not supported.
NOTE
To be fully compliant with all applicable DDR SDRAM memory specifications, the board should be
populated with DIMMs that support the Serial Presence Detect (SPD) data structure. This allows
the BIOS to read the SPD data and program the chipset to accurately configure memory settings
for optimum performance.
For information about Refer to
Obtaining DDR SDRAM specifications Section 1.5, page 15
Obtaining the PC Serial Presence Detect (SPD) Specification Section 1.5, page 15
19
Intel Desktop Board D845GVFN Technical Product Specification
Table 5 lists the supported DDR DIMM configurations.
Table 5. Supported DDR DIMM Configurations
DIMM
Capacity
64 MB SS 64 Mbit 8 M x 8/empty 8
64 MB SS 128 Mbit 8 M x 16/empty 4
128 MB DS 64 Mbit 8 M x 8/8 M x 8 16
128 MB SS 128 Mbit 16 M x 8/empty 8
128 MB SS 256 Mbit 16 M x 16/empty 4
256 MB DS 128 Mbit 16 M x 8/16 M x 8 16
256 MB SS 256 Mbit 32 M x 8/empty 8
256 MB SS 512 Mbit 32 M x 16/empty 4
512 MB DS 256 Mbit 32 M x 8/32 M x 8 16
512 MB SS 512 Mbit 64 M x 8/empty 8
1024 MB DS 512 Mbit 64 M x 8/64 M x 8 16
Note: In this column, “DS” refers to double-sided memory modules (containing DDR SDRAM devices on both sides)
and “SS” refers to single-sided memory modules (containing DDR SDRAM devices on only one side).
Configuration
(Note)
DDR SDRAM
Density
DDR SDRAM Organization
Front-side/Back-side
Number of DDR
SDRAM Devices
20
Product Description
1.8 Intel® 845GV Chipset
The Intel 845GV chipset consists of the following devices:
• Intel 82845GV Graphics and Memory Controller Hub (GMCH) with Accelerated Hub
Architecture (AHA) bus
• Intel 82801DB I/O Controller Hub (ICH4) with AHA bus
• Firmware Hub (FWH)
The GMCH is a centralized controller for the system bus, the memory bus, the AGP bus, and the
Accelerated Hub Architecture interface. The ICH4 is a centralized controller for the board’s I/O
paths. The FWH provides the nonvolatile storage of the BIOS.
For information about Refer to
The Intel 845GV chipset http://developer.intel.com/
Resources used by the chipset Chapter 2
1.8.1 Intel® Extreme Graphics Controller
The Intel Extreme Graphics controller features the following:
• Integrated graphics controller
⎯ 32 bpp (Bits Per Pixel) graphics engine
⎯ 266 MHz core frequency
⎯ 256-bit internal data path for 2-D and 3-D graphics
⎯ Motion video acceleration
• 3-D graphics visual and texturing enhancement
• Display
⎯ Integrated 24-bit 350 MHz RAMDAC
⎯ DDC2B compliant interface
• Video
⎯ Dual monitor synchronous display
⎯ Hardware motion compensation for software MPEG2 decode
• Dynamic Video Memory Technology (DVMT) support up to 64 MB
For information about Refer to
DVMT Section 1.8.1.1, page 25
21
Intel Desktop Board D845GVFN Technical Product Specification
Table 6 lists the Direct Draw supported modes.
Table 6. Direct Draw Supported Modes
Resolution Color Palette Refresh Frequency (Hz) Notes
320 x 200
320 x 240
352 x 480
352 x 576
400 x 300
512 x 384
640 x 400
Notes: Y = Supported in driver without Direct3D* and OpenGL*
3 = Direct3D and OpenGL
256 colors 70
64 K colors 70 3
16 M colors 70 3
256 colors 70
64 K colors 70 3
16 M colors 70 3
256 colors 70
64 K colors 70 3
16 M colors 70 3
256 colors 70
64 K colors 70 3
16 M colors 70 3
256 colors 70
64 K colors 70 3
16 M colors 70 3
256 colors 70
64 K colors 70 3
16 M colors 70 3
256 colors 70
64 K colors 70 3
16 M colors 70 3
Y
Y
Y
Y
Y
Y
Y
22
Table 7 lists the video BIOS video modes supported by the graphics subsystem.
Table 7. Video BIOS Video Modes Supported for Analog CRTs
Resolution Color Palette
320 x 200
16 colors 70
256 colors 70
320 x 350
360 x 400
640 x 200
640 x 350
640 x 480
16 colors 70
16 colors 70
16 colors 70
16 colors 70
16 colors 60
256 colors 60, 75, 85 G, B, L
64 K colors 60, 75, 85 G, B, L
16 M colors 60, 75, 85 G, B, L
720 x 400 16 colors 70 T, B
800 x 600
256 colors 60, 75, 85 G, B, L
64 K colors 60, 75, 85 G, B, L
16 M colors 60, 75, 85 G, B, L
1024 x 768
256 colors 60, 75, 85 G, B, L
64 K colors 60, 75, 85 G, B, L
16 M colors 60, 75, 85 G, B, L
1056 x 350 16 colors 70 T, B
1056 x 400 16 colors 70 T, B
1056 x 480 16 colors 70 T, B
1280 x 1024
256 colors 60, 75, 85 G, B, L
64 K colors 60, 75, 85 G, B, L
16 M colors 60, 75, 85 G, B, L
1600 x 1200
256 colors 60, 75, 85 G, B, L
64 K colors 60, 75, 85 G, B, L
16 M colors 60, 75, 85 G, B, L
256 colors 60, 75 G, B, L 1920 x 1440
64 K colors 60, 75 G, B, L
Notes: T = Text mode
G = Graphics mode
B = Banked addressing mode
L = Linear addressing mode
Available Refresh
Frequencies (Hz)
Notes
T, G, B
G, B
T, B
T, B
T, G, B
T, G, B
G, B
Product Description
23
Intel Desktop Board D845GVFN Technical Product Specification
Table 8 lists the supported configuration modes of the graphics subsystem.
Table 8. Supported Configuration Modes
Resolution
640 x 480 60, 72, 75, 85, 100, 120 6
800 x 600 60, 72, 75, 85, 100, 120 6
1024 x 768 60, 70, 75, 85, 100 6
1024 x 768 120 5
1152 x 864 60, 75, 85 6
1152 x 864 100 5
1280 x 720 60, 75, 85 6
1280 x 720 100 5
1280 x 768 Reduced blanking 6
1280 x 960 60, 75 6
1280 x 960 85 5
1280 x 1024
1280 x 1024
1280 x 1024
1280 x 1024
1400 x 1050
1600 x 900
1600 x 900
1600 x 900
1600 x 1200
1600 x 1200
1856 x 1392
1920 x 1080
1920 x 1080
1920 x 1200
1920 x 1440
2048 x 1536
Available Refresh
Frequencies (Hz)
60 6
75 5
85, 100 4
120 3
60 6
60 6
75, 85 4
100 3
60 4
75, 85, 100 3
60, 75 3
60 4
75, 85 3
60 3
60, 75 3
60 3
Supported bpp Configuration Mode
(see Table 9 for more information)
24
Product Description
Table 9 describes the bpp configuration mode values referenced in Table 8. In Table 9, assume that
for each configuration mode number, the features of all lower numbers are also supported. For
example, if the supported configuration mode is 4, then modes 1 through 3 are also supported.
DVD consists of both the overlay engine as well as the MPEG decoding; both are necessary for
DVD playback.
Table 9. Details of bpp Configuration Modes
Configuration Mode Number Descrip tion
6 32 bpp (16 M colors) with DVD (Overlay + MPEG decode) On
5 16 bpp (64 K colors) with DVD On
4 32 bpp (16 M colors) with DVD Off
3 16 bpp (64 K colors) with DVD Off
2 8 bpp (256 colors) with DVD On
1 8 bpp (256 colors) with DVD off
For information about Refer to
Obtaining graphics software and utilities Section 1.3, page 14
1.8.1.1 Dynamic Video Memory Technology (DVMT)
DVMT enables enhanced graphics and memory performance through Direct AGP, and highly
efficient memory utilization. DVMT ensures the most efficient use of available system memory
(up to 64 MB) for maximum 2-D/3-D graphics performance.
DVMT uses a portion of system physical memory (as set in the BIOS Setup program) for
compatibility with legacy applications. An example of this would be when using VGA graphics
under DOS. Once loaded, the operating system and graphics drivers allocate the buffers needed for
performing graphics functions.
NOTE
The use of DVMT requires operating system driver support.
For information about Refer to
Obtaining the DVMT white paper http://developer.intel.com/design/chipsets/845gv/
1.8.1.2 Zone Rendering Technology (ZRT)
The Intel Extreme Graphics Controller supports Zone Rendering Technology (ZRT). ZRT is a
process by which the screen is divided into several zones. Each zone is completely cached and
rendered on chip before being written to the frame buffer. The benefits of ZRT include the
following:
• Increased memory efficiency via better localization of data
• Increased on-chip processing speed due to decreased wait time for data
• Increased effective pixel fill rates
25
Intel Desktop Board D845GVFN Technical Product Specification
• Increased headroom for larger resolution and color depth
• Reduced power as a result of decreased memory bandwidth
• Reduction in depth and color bandwidth associated with conventional rendering
For information about Refer to
Obtaining the Zone Rendering white paper http://developer.intel.com/design/chipsets/845gv/
1.8.2 USB
The board supports up to four USB 2.0 ports, fully supports UHCI and EHCI, and uses UHCI- and
EHCI-compatible drivers. For more than four USB devices, an external hub can be connected to
any of the ports.
The ICH4 provides the USB controller for all ports. The port arrangement is as follows:
• Two ports are implemented with stacked back panel connectors, adjacent to the audio
connectors
• Two ports are routed to the front panel USB connector
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.
1.8.3 IDE Interfaces
The ICH4’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 ICH4’s ATA-100
logic can achieve transfer rates up to 100 MB/sec.
26
Product Description
INTEGRATOR’S 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.
The BIOS supports 48-bit 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 desktop boards support Laser Servo (LS-120) diskette technology through the IDE interfaces.
The BIOS supports booting from an LS-120 drive.
NOTE
The BIOS will always recognize an LS-120 drive as an ATAPI floppy drive. To ensure correct
operation, do not configure the drive as a hard disk drive.
1.8.4 Real-Time Clock, CMOS SRAM, and Battery
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.
INTEGRATOR’S NOTE
If the battery and AC power fail, custom defaults, if previously saved, will be loaded into CMOS
RAM at power-on.
27
Intel Desktop Board D845GVFN Technical Product Specification
1.9 I/O Controller
The SMSC LPC47M172 or National Semiconductor PC87372 I/O controller provides the following
features:
• 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 1.44 MB or 2.88 MB diskette drive
• Intelligent power management, including a programmable wake-up event interface
• PCI power management support
The BIOS Setup program provides configuration options for the I/O controller.
For information about Refer to
SMSC LPC47M172 I/O controller http://www.smsc.com
National Semiconductor PC87372 http://www.national.com
1.9.1 Serial Ports
The desktop board has two serial port connectors. Serial port A is located on the back panel. Serial
port B (optional) is accessible using a connector on the component side of the desktop board. The
serial ports support data transfers at speeds up to 115.2 kbits/sec with BIOS support.
For information about Refer to
The location of the serial port A connector Figure 4, page 46
The location of the optional serial port B connector Figure 7, page 52
1.9.2 Parallel Port
The 25-pin D-Sub parallel port connector is located on the back panel. Use the BIOS Setup
program to set the parallel port mode.
1.9.3 Diskette Drive Controller
The I/O controller supports one diskette drive. Use the BIOS Setup program to configure the
diskette drive interface.
1.9.4 Keyboard and Mouse Interface
PS/2 keyboard and mouse connectors are located on the back panel.
INTEGRATOR’S 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.
28
1.10 Audio Subsystem
The audio subsystem consists of the following devices:
• Intel 82801DB I/O Controller Hub (ICH4)
• Realtek ALC202A audio codec
The audio subsystem includes these features:
• Signal-to-noise ratio ≥ 90 dB
• Supports wake events (driver dependent)
• Mic in pre-amp that supports dynamic, condenser, and electret microphones
The audio subsystem supports the following audio interfaces:
• Optional ATAPI-style connectors:
⎯ Auxiliary line in
⎯ CD-ROM
• Front panel audio connector, including pins for:
⎯ Line out
⎯ Mic in
• Back panel audio connectors:
⎯ Line out
⎯ Line in
⎯ Mic in
Product Description
1.10.1 Audio Connectors
1.10.1.1 Front Panel Audio Connector
A 2 x 5-pin connector provides mic in and line out signals for front panel audio connectors.
For information about Refer to
The location of the connector Figure 5, page 48
The signal names of the front panel audio connector Table 21, page 49
Obtaining the Front Panel I/O Connectivity Design Guide Section 1.5, page 15
1.10.1.2 Auxiliary Line In Connector (Optional)
NOTE
The front panel audio connector is alternately used as a jumper block for routing audio signals.
Refer to Section 2.9.1 on page 56 for more information.
An optional 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 5, page 48
The signal names of the auxiliary line in connector Table 22, page 49
29
Intel Desktop Board D845GVFN Technical Product Specification
1.10.1.3 ATAPI CD-ROM Audio Connector (Optional)
An optional 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 5, page 48
The signal names of the ATAPI CD-ROM connector Table 23, page 49
1.10.2 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 1.3, page 14
1.11 LAN Subsystem (Optional)
The Network Interface Controller subsystem consists of the ICH4 (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 82562ET (10/100 Mbit/sec Ethernet)
• PCI Power Management
⎯ Supports ACPI technology
⎯ Supports LAN wake capabilities
1.11.1 Intel® 82562ET Platform LAN Connect Device
The Intel 82562ET component provides an interface to the back panel RJ-45 connector with
integrated LEDs.
The Intel 82562ET 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
• ACPI support
• Programmable transit threshold
• Configuration EEPROM that contains the MAC address
30
Product Description
1.11.2 RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector. Table 10 describes the LED states when the
desktop board is powered up and the LAN subsystem is operating.
Table 10. 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.
1.11.3 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 1.3, page 14
1.12 Hardware Management Subsystem (Optional)
The hardware management features enable the boards to be compatible with the Wired for
Management (WfM) specification. The board has several hardware management features,
including the following:
• Fan monitoring (through the I/O controller or the hardware monitoring and fan control ASIC)
• Thermal and voltage monitoring
• Chassis intrusion detection
For information about Refer to
The WfM specification Section 1.5, page 15
1.12.1 Hardware Monitoring and Fan Control ASIC
The features of the hardware monitoring and fan control ASIC include:
• Internal ambient temperature sensor
• Two remote thermal diode sensors for direct monitoring of processor temperature and ambient
temperature sensing
• Power supply monitoring of five voltages (+5 V, +12 V, +3.3 VSB, +1.5 V, and +VCCP) to
detect levels above or below acceptable values
• Thermally monitored closed-loop fan control, for all three fans, that can adjust the fan speed or
switch the fans on or off as needed
• SMBus interface
• Fan monitoring for all three fan connectors
31
Intel Desktop Board D845GVFN Technical Product Specification
1.12.2 Fan Monitoring
Fan monitoring can be implemented using Intel® LANDesk* Client Manager or third-party
software.
For information about Refer to
The functions of the fan connectors Section 1.13.2.2, page 36
1.12.3 Chassis Intrusion and Detection
The board supports a chassis security feature that detects if the chassis cover is removed. The
security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion
connector. When the chassis cover is removed, the mechanical switch is in the closed position.
1.13 Power Management
Power management is implemented at several levels, including:
• Software support through Advanced Configuration and Power Interface (ACPI)
• Hardware support:
⎯ Power connector
⎯ Fan connectors
⎯ LAN wake capabilities
⎯ Instantly Available PC technology
⎯ Resume on Ring
⎯ Wake from USB
⎯ Wake from PS/2 devices
⎯ Power Management Event signal (PME#) wake-up support
1.13.1 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 this board requires an operating system that
provides full ACPI support. ACPI features include:
• Plug and Play (including bus and device enumeration)
• 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 13 on page 34)
• Support for a front panel power and sleep mode switch
Table 11 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.
32
Table 11. 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 sw itch 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
For information about Refer to
The desktop boards’ compliance level with ACPI Section 1.5, page 15
1.13.1.1 System States and Power States
Product Description
…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)
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 12 lists the power states supported by the Desktop Board D845GVFN along with the
associated system power targets. See the ACPI specification for a complete description of the
various system and power states.
33
Intel Desktop Board D845GVFN Technical Product Specification
Table 12. Power States and Targeted System Power
Global States Sleeping States
G0 – working
S0 – working C0 – working D0 – working
state
G1 – sleeping
state
G1 – sleeping
state
S1 – Processor
stopped
S3 – Suspend to
RAM. Context
saved to RAM.
G1 – sleeping
state
S4 – Suspend to
disk. Context
saved to disk.
G2/S5 S5 – Soft off.
Context not saved.
Cold boot is
required.
G3 –
mechanical off
No power to the
system.
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 consumption of wake-up devices used in the system.
Processor
States
Device States
state.
C1 – stop
grant
D1, D2, D3 –
device
specification
specific.
No power D3 – no power
except for
wake-up logic.
No power D3 – no power
except for
wake-up logic.
No power D3 – no power
except for
wake-up logic.
No power D3 – no power for
wake-up logic,
except when
provided by
battery or external
source.
Targeted System
Power
Full power > 30 W
5 W < power < 52.5 W
Power < 5 W
Power < 5 W
Power < 5 W
No power to the system.
Service can be performed
safely.
(Note 1)
(Note 2)
(Note 2)
(Note 2)
1.13.1.2 Wake-up Devices and Events
Table 13 lists the devices or specific events that can wake the computer from specific states.
Table 13. Wake-up Devices and Events
These devices/events can wake up the computer… …from this state
LAN S1, S3, S4, S5
Modem (back panel Serial Port A) S1, S3
PME# signal S1, S3, S4, S5
Power switch S1, S3, S4, S5
PS/2 devices S1, S3
RTC alarm S1, S3, S4, S5
USB S1, S3
Note: For LAN and PME# signal, S5 is disabled by default in the BIOS Setup program. Setting this option to Power On
will enable a wake-up event from LAN in the S5 state.
(Note)
(Note)
34
Product Description
NOTE
The use of these wake-up events from an ACPI state requires an operating system that provides full
ACPI support. In addition, software, drivers, and peripherals must fully support ACPI wake
events.
1.13.2 Hardware Support
CAUTION
Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities and
Instantly Available PC 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.
The Desktop Board D845GVFN provides several power management hardware features, including:
• Power connector
• Fan connectors
• LAN wake capabilities
• Instantly Available PC technology
• Resume on Ring
• Wake from USB
• Wake from PS/2 keyboard
• PME# signal wake-up support
LAN wake capabilities and Instantly Available PC 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).
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.
35
Intel Desktop Board D845GVFN Technical Product Specification
1.13.2.1 Power Connector
ATX12V-, SFX12V-, and TFX12V-compliant power supplies can turn off the system power
through system control. When an ACPI-enabled system receives the correct command, the power
supply removes all non-standby voltages.
When resuming from an AC power failure, 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 Last Power State
feature in the BIOS Setup program’s Boot menu.
For information about Refer to
The location of the power connector Figure 5, page 48
The signal names of the power connector Table 27, page 50
The ATX, SFX, and TFX12V specifications Section 1.5, page 15
1.13.2.2 Fan Connectors
Table 14 summarizes the function/operation of the fan connectors.
Table 14. Fan Connector Function/Operation
Connector Description
Processor fan
Front chassis fan
Rear chassis fan
• +12 V DC connection for a processor fan or active fan heatsink.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Option to wire the fan tachometer input to the I/O controller or the Hardware
Monitoring and Fan Control ASIC.
• +12 V DC connection for a system or chassis fan.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Option to wire the fan tachometer input to the Hardware Monitoring and Fan
Control ASIC.
• +12 V DC connection for a system or chassis fan.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Option to wire the fan tachometer input to the I/O controller or the Hardware
Monitoring and Fan Control ASIC.
36
Product Description
1.13.2.3 LAN Wake Capabilities
CAUTION
For LAN wake capabilities, 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 LAN wake capabilities can damage the power supply.
LAN wake capabilities enable remote wake-up 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* frame, the LAN subsystem asserts a wake-up signal that powers
up the computer. Depending on the LAN implementation, the board supports LAN wake
capabilities with ACPI in the following ways:
• The PCI bus PME# signal for PCI 2.2 compliant LAN designs
• The onboard LAN subsystem
1.13.2.4 Instantly Available PC Technology
CAUTION
For Instantly Available PC 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 PC technology can damage the power supply.
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-RAM)
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 colored, or off if single colored.) When signaled by a
wake-up device or event, the system quickly returns to its last known wake state. Table 13 on
page 34 lists the devices and events that can wake the computer from the S3 state.
The board supports the PCI Bus Power Management Interface Specification. For information on
the version of this specification, see Section 1.5.
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 PC technology requires operating system support and PCI 2.2
compliant add-in cards and drivers.
1.13.2.5 +5 V Standby Power Indicator LED
The +5 V standby power indicator LED shows that power is still present even when the computer
appears to be off. Figure 3 shows the location of the standby power indicator LED.
CAUTION
If AC power has been switched off and the standby power indicator is still lit, disconnect the power
cord before installing or removing any devices connected to the board. Failure to do so could
damage the board and any attached devices.
37
Intel Desktop Board D845GVFN Technical Product Specification
CR1F1
Figure 3. Location of the Standby Power Indicator LED on the D845GVFN Board
1.13.2.6 Resume on Ring
The operation of Resume on Ring can be summarized as follows:
• Resumes operation from ACPI S1 or S3 states
• Detects incoming call similarly for external and internal modems
• Requires modem interrupt be unmasked for correct operation
1.13.2.7 Wake from USB
USB bus activity wakes the computer from ACPI S1 or S3 states.
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB.
1.13.2.8 Wake from PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1 or S3 state.
1.13.2.9 PME# Signal Wake-up Support
OM17297
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1, S3, S4, or
S5 state (with Wake on PME enabled in BIOS).
38
2 Technical Reference
What This Chapter Contains
2.1 Introduction ..................................................................................................................39
2.2 Memory Map................................................................................................................39
2.3 Fixed I/O Map...............................................................................................................40
2.4 DMA Channels.............................................................................................................41
2.5 PCI Configuration Space Map......................................................................................41
2.6 Interrupts......................................................................................................................42
2.7 PCI Interrupt Routing Map ...........................................................................................43
2.8 Connectors...................................................................................................................45
2.9 Jumper Blocks..............................................................................................................56
2.10 Mechanical Considerations..........................................................................................58
2.11 Electrical Considerations..............................................................................................60
2.12 Thermal Considerations...............................................................................................61
2.13 Reliability......................................................................................................................63
2.14 Environmental..............................................................................................................63
2.15 Regulatory Compliance................................................................................................64
2.1 Introduction
Sections 2.2 - 2.6 contain several standalone tables. Table 15 describes the system memory map,
Table 16 shows the I/O map, Table 17 lists the DMA channels, Table 18 defines the PCI
configuration space map, and Table 19 describes the interrupts. The remaining sections in this
chapter are introduced by text found with their respective section headings.
2.2 Memory Map
Table 15. 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
39
Intel Desktop Board D845GVFN Technical Product Specification
2.3 Fixed I/O Map
Table 16. I/O Map
Address (hex) Size Description
0000 - 00FF 256 bytes Used by the Desktop Board D845GVFN. Refer to the ICH4
data sheet for dynamic addressing information.
0170 - 0177 8 bytes Secondary IDE channel
01F0 - 01F7 8 bytes Primary IDE channel
0228 - 022F
0278 - 027F
02E8 - 02EF
02F8 - 02FF
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 82845GV GMCH
03C0 - 03DF 32 bytes Intel 82845GV GMCH
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
0CF9
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
Notes:
1. Default, but can be changed to another address range
2. Dword access only
3. Byte access only
(Note 1)
8 bytes LPT3
(Note 1)
8 bytes LPT2
(Note 1)
8 bytes COM4
(Note 1)
8 bytes COM2
(Note 2)
4 bytes PCI configuration address register
(Note 3)
1 byte Turbo and reset control register
NOTE
Some additional I/O addresses are not available due to ICH4 address aliasing. The ICH4 data
sheet provides more information on address aliasing.
For information about Refer to
Obtaining the ICH4 data sheet Section 1.3 on page 14
40
2.4 DMA Channels
Table 17. DMA Channels
DMA Channel Number Data Width System Resource
0 8 or 16 bits Open
1 8 or 16 bits Parallel port
2 8 or 16 bits Diskette drive
3 8 or 16 bits Parallel port (for ECP or EPP)
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 18. PCI Configuration Space Map
Bus
Number (hex)
00 00 00 Memory controller of Intel 82845GV component
00 02 00 Intel Extreme Graphics Controller
00 1E 00 Hub link to PCI bridge
00 1F 00 Intel 82801DB ICH4 PCI to LPC bridge
00 1F 01 IDE controller
00 1F 03 SMBus controller
00 1F 05 AC ’97 audio controller
00 1F 06 AC ’97 modem controller (optional)
00 1D 00 USB UHCI controller 1
00 1D 01 USB UHCI controller 2
00 1D 02 USB UHCI controller 3
00 1D 07 EHCI controller
01 08 00 LAN controller (optional)
01 00 00 PCI bus connector 1
01 01 00 PCI bus connector 2
01 02 00 PCI bus connector 3
Device
Number (hex)
Function
Number (hex) Description
Technical Reference
41
Intel Desktop Board D845GVFN Technical Product Specification
2.6 Interrupts
The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the
Advanced Programmable Interrupt Controller (APIC) portion of the ICH4 component. The PIC is
supported in Windows 98 SE and Windows ME and uses the first 16 interrupts. The APIC is
supported in Windows 2000 and Windows XP and supports a total of 24 interrupts.
Table 19. 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)/User available
6 Diskette drive
7 LPT1
8 Real-time clock
9 Reserved for ICH4 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 2)
16
17
18
19
20
21
22
23
Notes:
1. Default, but can be changed to another IRQ.
2. Available in APIC mode only.
USB UHCI controller 1 (through PIRQA)
(Note 2)
AC '97 audio/modem/User available (through PIRQB)
(Note 2)
ICH4 USB controller 3 (through PIRQC)
(Note 2)
ICH4 USB controller 2 (through PIRQD)
(Note 2)
ICH4 LAN (optional) (through PIRQE)
(Note 2)
User available (through PIRQF)
(Note 2)
User available (through PIRQG)
(Note 2)
ICH4 USB 2.0 EHCI controller/User available (through PIRQH)
(Note 1)
(Note 1)
(Note 1)
42
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.
The ICH4 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 Desktop Board D845GVFN and therefore
share the same interrupt. Table 20 shows an example of how the PIRQ signals are routed.
For example, using Table 20 as a reference, assume an add-in card using INTA is plugged into PCI
bus connector 3. In PCI bus connector 3, INTA is connected to PIRQC, which is already connected
to the ICH4 USB. The add-in card in PCI bus connector 3 now shares an interrupt with the
onboard interrupt source.
43
Intel Desktop Board D845GVFN Technical Product Specification
Table 20. PCI Interrupt Routing Map
PCI Interrupt Source
Intel Extreme Graphics
Controller
ICH4 USB UHCI controller 1
SMBus controller
ICH4 USB UHCI controller 2
AC ’97 ICH4 Audio/Modem
ICH4 LAN
ICH4 USB UHCI controller 3
ICH4 USB 2.0 EHCI controller
PCI bus connector 1
PCI bus connector 2
PCI bus connector 3
PIRQA PIRQB PIRQC PIRQD PIRQE PIRQF PIRQG PIRQH
INTA
INTA
INTB
INTB
INTB
INTA
INTC
INTD
INTD INTA INTB INTC
INTC INTB INTA INTD
INTD INTC INTA INTB
ICH4 PIRQ Signal Name
NOTE
In PIC mode, the ICH4 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. Refer to Table 19 for the allocation of PIRQ
lines to IRQ signals in APIC mode.
44
Technical Reference
2.8 Connectors
CAUTION
Only the back panel USB, front panel USB, VGA, and PS/2 connectors have overcurrent
protection. The desktop boards’ 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 these groups:
• Back panel I/O connectors (see page 46)
⎯ PS/2 keyboard and mouse
⎯ USB (two ports)
⎯ Parallel port
⎯ Serial port A
⎯ VGA port
⎯ LAN (optional)
⎯ Audio (line out, line in, and mic in)
• Internal I/O connectors (see page 47)
⎯ Audio (auxiliary line input, ATAPI CD-ROM, and front panel audio)
⎯ Fans
⎯ Power
⎯ Add-in boards (PCI)
⎯ IDE
⎯ Diskette drive
⎯ Chassis intrusion (optional)
• External I/O connectors (see page 52)
⎯ Serial Port B (optional)
⎯ Auxiliary front panel power/sleep LED
⎯ Front panel (power/sleep LED, power switch, hard drive activity LED, reset switch, and
auxiliary front panel power LED)
⎯ Front panel USB (one connector for two ports)
NOTE
When installing the board in a microATX chassis, make sure that peripheral devices are installed
at least 1.5 inches above the main power connector, the diskette drive connector, the IDE
connector, and the DIMM sockets.
45
Intel Desktop Board D845GVFN Technical Product Specification
2.8.1 Back Panel Connectors
Figure 4 shows the location of the back panel connectors. The back panel connectors are
color-coded in compliance with PC 99 recommendations. The figure legend below lists the
colors used.
A
B
G IC E
Item Description Color
A PS/2 mouse port Green
B PS/2 keyboard port Purple
C Serial port A Teal
D Parallel port Burgundy
E VGA Dark blue
F LAN (optional) Black
G USB ports Black
H Audio line in Light blue
I Mic in Pink
J Audio line out Lime green
Figure 4. Back Panel Connectors
HD
F
J
OM17298
46
Technical Reference
INTEGRATOR’S 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.
2.8.2 Internal I/O Connectors
The internal I/O connectors are divided into the following functional groups:
• Audio, power, and hardware control (see page 48)
⎯ Front panel audio
⎯ Auxiliary line in (optional)
⎯ ATAPI CD-ROM (optional)
⎯ Fans (3)
⎯ ATX12V power
⎯ Main power
⎯ Chassis intrusion (optional)
• Add-in boards and peripheral interfaces (see page 51)
⎯ PCI bus
⎯ IDE
⎯ Diskette drive
2.8.2.1 Expansion Slots
The desktop board has three PCI rev 2.2 compliant local bus slots. The SMBus is routed to PCI bus
connector 2.
INTEGRATOR’S NOTE
This document references back-panel slot numbering with respect to processor location on the
desktop board. PCI slots are identified as PCI slot #x, starting with the slot closest to the
processor. 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 desktop board’s silkscreen are
opposite and could cause confusion. The ATX numbering convention is made without respect to
slot type, but refers to an actual slot location on a chassis. Figure 6 on page 51 illustrates the
desktop board’s PCI slot numbering.
47
Intel Desktop Board D845GVFN Technical Product Specification
2.8.2.2 Audio, Power, and Hardware Control Connectors
Figure 5 shows the location of the audio, power, and hardware control connectors.
A
B CD
1
4
12
10
9
1
4
21
4
3
3
E
1
1
1
I H
1
3
20
3
10
11
1
G
OM17299
F
Item Description For more information see:
A Front panel audio Table 21
B Auxiliary line in, ATAPI style (gray) [optional] Table 22
C ATAPI CD-ROM (black) [optional] Table 23
D +12 V power connector (ATX12V) Table 24
E Rear chassis fan Table 25
F Processor fan Table 26
G Main power Table 27
H Front chassis fan Table 28
I Chassis intrusion [optional] Table 29
Figure 5. Audio, Power, and Hardware Control Connectors
48
Table 21. Front Panel Audio Connector
Pin Signal Name Pin Signal Name
1 MIC_IN 2 Ground
3 MIC_BIAS 4 +5 V
5 RIGHT_OUT 6 RIGHT_IN
7 No connect 8 Key
9 LEFT_OUT 10 LEFT_IN
Table 22. Auxiliary Line In Connector (Optional)
Pin Signal Name
1 Left auxiliary line in
2 Ground
3 Ground
4 Right auxiliary line in
Table 23. ATAPI CD-ROM Connector (Optional)
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
Technical Reference
INTEGRATOR’S NOTES
• Use only ATX12V-, SFX12V-, or TFX12V-compliant power supplies with this board. ATX12V,
SFX12V, and TFX12V power supplies have an additional power lead that provides required
supplemental power for the processor. Always connect the 20-pin and 4-pin leads of ATX12V,
SFX12V, and TFX12V power supplies to the corresponding connectors on the desktop board,
otherwise the desktop board will not boot.
• Do not use a standard ATX power supply. The desktop board will not boot with a standard
ATX power supply.
Table 24. ATX12V Power Connector
Pin Signal Name Pin Signal Name
1 Ground 2 Ground
3 +12 V 4 +12 V
49
Intel Desktop Board D845GVFN Technical Product Specification
Table 25. Rear Chassis Fan Connector
Pin Signal Name
1 Ground (default) or
FNT_REAR_FAN_CTRL (optional)
2 +12 V
3 No connect (default) or
REAR_TACH_OUT (optional)
Table 26. Processor Fan Connector
Pin Signal Name
1 Ground (default) or CPU_FAN_CTRL
(optional)
2 +12 V
3 No connect (default) or
CPU_FAN_TACH
Table 27. Main Power Connector
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 No connect
9 +5 V (Standby) 19 +5 V
10 +12 V 20 +5 V
Table 28. Front Chassis Fan Connector
Pin Signal Name
1 Ground (default) or
FNT_REAR_FAN_CTRL (optional)
2 +12 V
3 No connect (default) or
FRONT_FAN_TACH (optional)
Table 29. Chassis Intrusion Connector (Optional)
Pin Signal Name
1 Intruder
2 Ground
50
Technical Reference
2.8.2.3 Add-in Board and Peripheral Interface Connectors
Figure 6 shows the location of the add-in board connector and peripheral connectors for the
Desktop Board D845GVFN. Note the following considerations for the PCI bus connectors:
• All of the PCI bus connectors are bus master capable.
• SMBus signals are routed to PCI bus connector 2, enabling PCI bus add-in boards with SMBus
support to access sensor data on the desktop board. The SMBus signals are as follows:
⎯ The SMBus clock line is connected to pin A40.
⎯ The SMBus data line is connected to pin A41.
B C
A
2
1
2
1
F
E
40
39
2
40
39
1
34
33
D
OM17300
Item Description
A PCI bus connector 3
B PCI bus connector 2
C PCI bus connector 1
D Diskette drive
E Primary IDE
F Secondary IDE
Figure 6. Add-in Board and Peripheral Interface Connectors
51
Intel Desktop Board D845GVFN Technical Product Specification
2.8.3 External I/O Connectors
Figure 7 shows the locations of the external I/O connectors.
1
2
D
7
10
1
2
C
8
9
13
1
9
2
8
B
Item Description Fo r more information see:
A Serial Port B (optional) Table 30
B Auxiliary front panel power/sleep LED Table 31
C Front panel Table 32 and Figure 8
D Front panel USB Figure 9
Figure 7. External I/O Connectors
Table 30. Serial Port B Connector (optional)
Pin Signal Name Pin Signal Name
1 DCD 2 RXD
3 TXD 4 DTR
5 Ground 6 DSR
7 RTS 8 CTS
9 RI 10 Not connected
OM17301
A
52
Technical Reference
2.8.3.1 Auxiliary Front Panel Power/Sleep LED Connector
Pins 1 and 3 of this connector duplicate the signals on pins 2 and 4 of the front panel connector.
Table 31 lists the signal names of the Auxiliary Front Panel Power/Sleep LED Connector.
Table 31. Auxiliary Front Panel Power/Sleep LED Connector
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 32 lists the signal names of
the front panel connector. Figure 8 is a connection diagram for the front panel connector.
Table 32. Front Panel Connector
Pin Signal In/Out Description Pin Signal In/Out Description
Hard Drive Activity LED Power LED
1 HD_PWR Out Hard disk LED pull-up
(750 Ω) to +5 V
3 HAD# Out Hard disk active LED 4 HDR_BLNK_
Reset Switch On/Off Switch
5 Ground Ground 6 SWITCH_ON# In Power switch
7 FP_RESET# In Reset switch 8 Ground Ground
9 +5 V Out Power 10 No connect Not connected
2 HDR_BLNK_
GRN
YEL
Out Front panel green
LED
Out Front panel yellow
LED
Single-colored
Power LED
Hard Drive
Activity LED
+
−
Reset
Switch
+5 V DC
2
1
4
3
6
5
8
7
9
+
−
Power
Switch
N/C
Figure 8. Connection Diagram for Front Panel Connector
Dual-colored
Power LED
−
+
OM16110
53
Intel Desktop Board D845GVFN Technical Product Specification
2.8.3.2.1 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.
2.8.3.2.2 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 desktop board resets and runs the POST.
2.8.3.2.3 Power/Sleep LED Connector
Pins 2 and 4 can be connected to a one- or two-color LED. Table 33 shows the possible states for a
one-color LED. Table 34 shows the possible states for a two-color LED.
Table 33. States for a One-Color Power LED
LED State Description
Off Power off/sleeping
Steady Green Running
Table 34. States for a Two-Color Power LED
LED State Description
Off Power off
Steady Green Running
Steady Yellow Sleeping
NOTE
The colors listed in Table 33 and Table 34 are suggested colors only. Actual LED colors are
product- or customer-specific.
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 Desktop Board D845GVFN.) At
least two seconds must pass before the power supply will recognize another on/off signal.
54
Technical Reference
2.8.3.3 Front Panel USB Connector
Figure 9 is a connection diagram for the front panel USB connector.
INTEGRATOR’S NOTES
• The +5 V DC power on the USB connector is fused.
• Pins 1, 3, 5, and 7 comprise one USB port.
• Pins 2, 4, 6, and 8 comprise one USB port.
• Use only a front panel USB connector that conforms to the USB 2.0 specification for high-
speed USB devices.
One
USB
Port
Power
(+5 V DC)
D−
D+
Ground
Key (no pin)
2
1
4
3
6
5
8
7
10
Power
(+5 V DC)
D−
D+
Ground
No Connect
One
USB
Port
OM15963
Figure 9. Connection Diagram for Front Panel USB Connector
55
Intel Desktop Board D845GVFN 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 desktop board could be
damaged.
Figure 10 shows the location of the jumper blocks.
A
2
1
10
9
J8A1
B
31
J9H2
OM17302
Item Description Reference Designator
A Front panel audio connector/jumper block J8A1
B BIOS Setup configuration jumper block J9H2
Figure 10. Location of the Jumper Blocks
2.9.1 Front Panel Audio Connector/Jumper Block
This connector has two functions:
• With jumpers installed, the audio line out signals are routed to the back panel audio line out
connector.
• With jumpers removed, the connector provides audio line out and mic in signals for front panel
audio connectors.
Table 35 describes the two configurations of this connector/jumper block.
56
Technical Reference
CAUTION
Do not place jumpers on this block in any configuration other than the one described in Table 35.
Other jumper configurations are not supported and could damage the desktop board.
Table 35. Front Panel Audio Connector/Jumper Block
Jumper Setting Configuration
1
3
5
7
9
2
4
6
10
1
34
5
7
9
2
6
10
1 and 2
5 and 6
9 and 10
No jumpers
installed
Audio line out signals are routed to the back panel audio line out
connector. The back panel audio line out connector is shown in Figure 4
on page 46.
Audio line out and mic in signals are available for front panel audio
connectors. Table 21 on page 49 lists the names of the signals available
on this connector when no jumpers are installed.
INTEGRATOR’S NOTE
When the jumpers are removed and this connector is used for front panel audio, the back panel
audio line out and mic in connectors are disabled.
2.9.2 BIOS Setup Configuration Jumper Block
The 3-pin jumper block determines the BIOS Setup program’s mode. Table 36 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 36. BIOS Setup Configuration Jumper Settings
Function/Mode Jumper Setting Configuration
Normal
1-2
Configure
2-3
Recovery
None
The BIOS uses current configuration information and
13
passwords for booting.
After the POST runs, Setup runs automatically. The
13
maintenance menu is displayed.
The BIOS attempts to recover the BIOS configuration. A
13
recovery diskette is required.
57
Intel Desktop Board D845GVFN Technical Product Specification
2.10 Mechanical Considerations
The Desktop Board D845GVFN is designed to fit into either a microATX or an ATX-form-factor
chassis. Figure 11 illustrates the mechanical form factor for the desktop board. Dimensions are
given in inches [millimeters]. The outer dimensions are 9.20 inches by 8.20 inches
[233.68 millimeters by 208.28 millimeters]. Location of the I/O connectors and mounting holes are
in compliance with the ATX specification.
INTEGRATOR’S NOTE
When installing the desktop board in a microATX chassis, make sure that peripheral devices are
installed at least 1.5 inches above the main power connector, the diskette drive connector, the IDE
connector, and the DIMM sockets.
.800
[20.32]
6.50
[165.10]
6.10
[154.94]
5.20
[132.08]
0.00
1.700
[42.5]
.150
[3.81]
0.00
2.600
[66.04]
Figure 11. Desktop Board Dimensions
8.800
[223.52]
9.050
[229.87]
OM17303
58
Technical Reference
2.10.1 I/O Shield
The back panel I/O shield for the Desktop Board D845GVFN must meet specific dimension and
material requirements. Systems based on this desktop board need the back panel I/O shield to pass
emissions (EMI) certification testing. Figure 12 shows the critical dimensions of the I/O shield.
Dimensions are given in inches [millimeters], to a tolerance of ±0.020 inches [0.508 millimeters].
The figures also indicate the position of each cutout. Additional design considerations for I/O
shields relative to chassis requirements are described in the ATX specification. See Section 1.5 for
information about the ATX specification.
INTEGRATOR’S NOTE
An I/O shield compliant with the ATX chassis specification 2.03 is available from Intel.
REF
6.390
[162.300]
0.787 0.010 TYP [20 0.254]
0.063 0.005
[1.600 0.120]
0.884
[22.450]
0.276
[7.012]
0.000
[0.000]
0.465
[11.811]
0.567
[14.400]
3x Dia 0.039 [1.000]
0.000
[0.000]
0.447
1.195
[11.345]
1.807
[30.360]
2.081
[45.892]
[52.854]
3.219
[81.768]
3x Dia 0.330 [8.380]
4.840
[122.950]
5.771
[146.577]
Pictorial
View
8X R0.5 MIN
A
0.519
[13.190]
0.027
[0.690]
0.465
[11.810]
0.472
[12.000]
OM11487
Figure 12. I/O Shield Dimensions
59
Intel Desktop Board D845GVFN Technical Product Specification
2.11 Electrical Considerations
2.11.1 DC Loading
Table 37 lists the DC loading characteristics of the board. This data is based on a DC analysis of
all active components within the board that impact its power delivery subsystems. The analysis
does not include PCI add-in cards. Minimum values assume a light load placed on the board that is
similar to an environment with no applications running and no USB current draw. Maximum
values assume a load placed on the board that is similar to a heavy gaming environment with a
500 mA current draw per USB port. These calculations are not based on specific processor values
or memory configurations but are based on the minimum and maximum current draw possible from
the board’s power delivery subsystems to the processor, memory, and USB ports.
Use the datasheets for add-in cards, such as PCI, to determine the overall system power
requirements. The selection of a power supply at the system level is dependent on the system’s
usage model and not necessarily tied to a particular processor speed.
Table 37. DC Loading Characteristics
DC Current at:
Mode DC Power +3.3 V +5 V +12 V -12 V +5 VSB
Minimum loading 190.00 W 5.00 A 11.00 A 9.00 A 0.03 A 0.60 A
Maximum loading 286.00 W 11.00 A 15.00 A 13.00 A 0.10 A 1.40 A
2.11.2 Add-in Board Considerations
The Desktop Board D845GVFN is designed to provide 2 A (average) of +5 V current for each addin board. The total +5 V current draw for add-in boards for a fully loaded Desktop Board
D845GVFN (all three expansion slots filled) must not exceed 6 A.
2.11.3 Fan Connector Current Capability
CAUTION
The processor fan must be connected to the processor fan connector, not to a chassis fan
connector. Connecting the processor fan to a chassis fan connector may result in onboard
component damage that will halt fan operation.
Table 38 lists the current capability of the fan connectors on the Desktop Board D845GVFN.
Table 38. Fan Connector Current Capability
Fan Connector Maximum Available Current
Processor fan 1.00 A
Front chassis fan 1.00 A
Rear chassis fan 1.00 A
60
Technical Reference
2.11.4 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.
System integrators should refer to the power usage values listed in Table 37 when selecting a power
supply for use with the Desktop Board D845GVFN.
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 1.5, page 15
2.12 Thermal Considerations
CAUTION
The use of an Intel Pentium 4 processor operating above 2.80 GHz with this Intel desktop board
requires the following:
• A chassis with appropriate airflow to ensure proper cooling of the components on the board
• A processor fan heatsink that meets the thermal performance targets for Pentium 4 processors
operating above 2.80 GHz
Failure to ensure appropriate airflow may result in reduced performance of both the processor
and/or voltage regulator or, in some instances, damage to the desktop board. For a list of chassis
that have been tested with Intel desktop boards please refer to the following website:
http://developer.intel.com/design/motherbd/cooling.htm
All responsibility for determining the adequacy of any thermal or system design remains solely with
the reader. Intel makes no warranties or representations that merely following the instructions
presented in this document will result in a system with adequate thermal performance.
CAUTION
Ensure that the ambient temperature does not exceed the desktop board’s maximum operating
temperature. Failure to do so could cause components to exceed their maximum case temperature
and malfunction. For information about the maximum operating temperature, see the
environmental specifications in Section 2.14.
61
Intel Desktop Board D845GVFN Technical Product Specification
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 13) can reach a temperature of up to 85
Figure 13 shows the locations of the localized high temperature zones.
o
C in an open chassis.
A
B
D
C
OM17304
Item Description
A Processor voltage regulator area
B Processor
C Intel 82845GV GMCH
D Intel 82801DB ICH4
Figure 13. Localized High Temperature Zones
Table 39 provides maximum case temperatures for Desktop Board D845GVFN components that are
sensitive to thermal changes. The operating temperature, current load, or operating frequency could
affect case temperatures. Maximum case temperatures are important when considering proper
airflow to cool the Desktop Board D845GVFN.
Table 39. Thermal Considerations for Components
Component Maximum Case Temperature
Intel Pentium 4 processor For processor case temperature, see processor datasheets and
processor specification updates
Intel 82845GV GMCH 92 oC (under bias)
Intel 82801DB ICH4 110 oC (under bias)
62
Technical Reference
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 MTBF data is calculated from predicted data at 55 ºC. The Desktop Board D845GVFN MTBF
is 149979.68 hours.
2.14 Environmental
Table 40 lists the environmental specifications for the Desktop Board D845GVFN.
Table 40. Desktop Board D845GVFN Environmental Specifications
Parameter Specification
Temperature
Non-Operating
Operating
Shock
Unpackaged 50 g tr apezoidal 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
-40 °C to +70 °C
0 °C to +55 °C
63
Intel Desktop Board D845GVFN Technical Product Specification
2.15 Regulatory Compliance
This section describes the desktop boards’ compliance with U.S. and international safety and
electromagnetic compatibility (EMC) regulations.
2.15.1 Safety Regulations
Table 41 lists the safety regulations the Desktop Board D845GVFN complies with when correctly
installed in a compatible host system.
Table 41. Safety Regulations
Regulation Title
UL 60950 3rd ed., 2000/CSA
C22.2 No. 60950-00
EN 60950:2000 The Standard for Safety of Information Technology Equipment including
IEC 60950, 3rd Edition, 1999 The Standard for Safety of Information Technology Equipment including
Bi-National Standard for Safety of Information Technology Equipment
including Electrical Business Equipment. (USA and Canada)
Electrical Business Equipment. (European Union)
Electrical Business Equipment. (International)
2.15.2 EMC Regulations
Table 42 lists the EMC regulations the Desktop Board D845GVFN complies with when correctly
installed in a compatible host system.
Table 42. EMC Regulations
Regulation Title
FCC (Class B) Title 47 of the Code of Federal Regulations, Parts 2 and 15, Subpart B,
Radio Frequency Devices. (USA)
ICES-003 (Class B) Interference-Causing Equipment Standard, Digital Apparatus. (Canada)
EN55022: 1998 (Class B) Limits and methods of measurement of Radio Interference
Characteristics of Information Technology Equipment. (European Union)
EN55024: 1998 Information Technology Equipment – Immunity Characteristics Limits
and methods of measurement. (European Union)
AS/NZS 3548 (Class B) Australian Communications Authority, Standard for Electromagnetic
Compatibility. (Australia and New Zealand)
CISPR 22, 3rd Edition (Class B) Limits and methods of measurement of Radio Disturbance
Characteristics of Information Technology Equipment. (International)
CISPR 24: 1997 Information T echnology Equipment – Immunity Characteristics – Limits
and Methods of Measurements. (International)
64
Technical Reference
2.15.2.1 FCC Compliance Statement (USA)
Product Type: D845GVFN Desktop Board
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment to a different electrical branch circuit from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications to the equipment not expressly approved by Intel Corporation could
void the user’s authority to operate the equipment.
2.15.2.2 Canadian Compliance Statement
This Class B digital apparatus complies with Canadian ICES-003.
Cet appereil numérique de la classe B est conforme à la norme NMB-003 du Canada.
2.15.3 European Union Declaration of Conformity Statement
We, Intel Corporation, declare under our sole responsibility that the product: Intel
D845GVFN is in conformity with all applicable essential requirements necessary for CE marking,
following the provisions of the European Council Directive 89/336/EEC (EMC Directive) and
Council Directive 73/23/EEC (Safety/Low Voltage Directive).
The product is properly CE marked demonstrating this conformity and is for distribution within all
member states of the EU with no restrictions.
This product follows the provisions of the European Directives 89/336/EEC and 73/23/EEC.
®
Desktop Board
2.15.4 Product Ecology Statements
The following information is provided to address worldwide product ecology concerns and
regulations.
65
Intel Desktop Board D845GVFN Technical Product Specification
2.15.4.1 Disposal Considerations
This product contains the following materials that may be regulated upon disposal: lead solder on
the printed wiring board assembly.
2.15.4.2 Recycling Considerations
Intel encourages its customers to recycle its products and their components (e.g., batteries, circuit
boards, plastic enclosures, etc.) whenever possible. In the U.S., a list of recyclers in your area can
be found at:
http://www.eiae.org/
In the absence of a viable recycling option, products and their components must be disposed of in
accordance with all applicable local environmental regulations.
2.15.5 Product Certification Markings (Board Level)
Table 43 lists the board’s product certification markings.
Table 43. Product Certification Markings
Description Marking
UL joint US/Canada Recognized Component mark. Includes adjacent
UL file number for Intel Desktop Boards: E210882 (component side).
FCC Declaration of Conformity logo mark for Class B equipment;
includes Intel name and D845GVFN model designation (component
side).
CE mark. Declares compliance to European Union (EU) EMC directive
(89/336/EEC) and Low Voltage directive (73/23/EEC) (component side).
The CE mark should also be on the shipping container.
Australian Communications Authority (ACA) C-Tick mark. Includes
adjacent Intel supplier code number, N-232. The C-tick mark should
also be on the shipping container.
Printed wiring board manufacturer’s recognition mark: consists of a
unique UL recognized manufacturer’s logo, along with a flammability
rating (solder side).
94V-0
66
3 Overview of BIOS Features
What This Chapter Contains
3.1 Introduction ..................................................................................................................67
3.2 BIOS Flash Memory Organization ...............................................................................68
3.3 Resource Configuration ...............................................................................................68
3.4 System Management BIOS (SMBIOS) ........................................................................69
3.5 Legacy USB Support....................................................................................................70
3.6 BIOS Updates..............................................................................................................70
3.7 Boot Options ................................................................................................................71
3.8 Fast Booting Systems with Intel® Rapid BIOS Boot.....................................................73
3.9 BIOS Security Features ...............................................................................................74
3.1 Introduction
The board uses an Intel/AMI BIOS that is stored in the Firmware Hub (FWH) and can be updated
using a disk-based program. The FWH contains the BIOS Setup program, POST, the PCI autoconfiguration utility, and Plug and Play support.
The BIOS displays a message during POST identifying the type of BIOS and a revision code. The
initial production BIOSs are identified as FN84510A.86A.
When the BIOS Setup program configuration jumper is set to configuration mode and the computer
is powered-up, the BIOS compares the CPU version and the microcode version in the BIOS and
reports if the two match.
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
NOTE
The maintenance menu is displayed only when the board is in configuration mode. Section 2.9.2 on
page 57 tells how to put the board in configuration mode.
67
Intel Desktop Board D845GVFN Technical Product Specification
Table 44 lists the BIOS Setup program menu features.
Table 44. BIOS Setup Program Menu Bar
Maintenance Main Advanced Security Power Boot Exit
Selects boot
options and
power supply
controls
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
Table 45 lists the function keys available for menu screens.
Table 45. BIOS Setup Program Function Keys
BIOS Setup Program Function Key Description
<←> or <→>
<↑> or <↓>
<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
For information about Refer to
The desktop boards’ compliance level with Plug and Play Section 1.5, page 15
Selects a different menu screen (Moves the cursor left or right)
Selects an item (Moves the cursor up or down)
Saves or
discards
changes to
Setup
program
options
3.2 BIOS Flash Memory Organization
The Firmware Hub (FWH) includes a 3 Mbit (384 KB) symmetrical flash memory device.
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.
For information about the versions of PCI and Plug and Play supported by the BIOS, see
Section 1.5.
68
Overview of BIOS Features
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 1.5 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.
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
69
Intel Desktop Board D845GVFN Technical Product Specification
Non-Plug and Play operating systems, such as Windows NT*, require an additional interface for
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.
For information about Refer to
The desktop boards’ compliance level with SMBIOS Section 1.5, page 15
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.
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 Verifying that the updated BIOS matches the target system to prevent accidentally
installing an incompatible BIOS.
®
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.
70
Overview of BIOS Features
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 1.3, page 14
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.
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. The Integrator’s Toolkit that is available from Intel can be used to
create a custom splash screen.
NOTE
If you add a custom splash screen, it will share space with the Intel branded logo.
For information about
The Intel World Wide Web site Section 1.3, page 14
Refer to
3.7 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.
3.7.1 CD-ROM 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.
For information about Refer to
The El Torito specification Section 1.5, page 15
3.7.2 Network Boot
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.
Pressing the <F12> key during POST automatically forces boot from the LAN.
71
Intel Desktop Board D845GVFN Technical Product Specification
3.7.3 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
3.7.4 Changing the Default Boot Device During POST
Pressing the <F10> key during POST causes a boot device menu to be displayed. This menu
displays the list of available boot devices (as set in the BIOS setup program’s Boot Device Priority
Submenu). Table 46 lists the boot device menu options.
Table 46. Boot Device Menu Options
Boot Device Menu Function Keys Description
<↑> or <↓>
<Enter> Exits the menu, saves changes, and boots from the selected device
<Esc> Exits the menu without saving changes
Selects a default boot device
72
Overview of BIOS Features
3.8 Fast Booting Systems with Intel® Rapid BIOS Boot
These factors affect system boot speed:
• Selecting and configuring peripherals properly
• Using an optimized BIOS, such as the Intel
3.8.1 Peripheral Selection 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
3.8.2 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 three to 30 seconds
(using the Hard Disk Pre-Delay feature of the Advanced Menu in the IDE Configuration Submenu
of the BIOS Setup program).
73
Intel Desktop Board D845GVFN Technical Product Specification
3.9 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 47 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 47. 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 can change all Setup options.
Supervisor
Mode
(Note)
options
Can change all
options
Can change all
options
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
74
4 Error Messages and Beep Codes
What This Chapter Contains
4.1 BIOS Error Messages..................................................................................................75
4.2 Port 80h POST Codes .................................................................................................77
4.3 Bus Initialization Checkpoints ......................................................................................81
4.4 Speaker ....................................................................................................................... 82
4.5 BIOS Beep Codes........................................................................................................82
4.1 BIOS Error Messages
Table 48 lists the error messages and provides a brief description of each.
Table 48. BIOS Error Messages
Error Message Explanation
GA20 Error An error occurred with Gate A20 when switching to protected
mode during the memory test.
Pri Master HDD Error
Pri Slave HDD Error
Sec Master HDD Error
Sec Slave HDD Error
Pri Master Drive - ATAPI Incompatible
Pri Slave Drive - ATAPI Incompatible
Sec Master Drive - ATAPI Incompatible
Sec Slave Drive - ATAPI Incompatible
A: Drive Error No response from diskette drive.
Cache Memory Bad An error occurred when testing L2 cache. Cache memory may be
CMOS Battery Low The battery may be losing power. Replace the battery soon.
CMOS Display Type Wrong The display type is different than what has been stored in CMOS.
CMOS Checksum Bad The CMOS checksum is incorrect. CMOS memory may have
CMOS Settings Wrong CMOS values are not the same as the last boot. These values
CMOS Date/Time Not Set The time and/or date values stored in CMOS are invalid. Run
DMA Error Error during read/write test of DMA controller.
FDC Failure Error occurred trying to access diskette drive controller.
HDC Failure Error occurred trying to access hard disk controller.
Could not read sector from corresponding drive.
Corresponding drive in not an ATAPI device. Run Setup to make
sure device is selected correctly.
bad.
Check Setup to make sure type is correct.
been corrupted. Run Setup to reset values.
have either been corrupted or the battery has failed.
Setup to set correct values.
continued
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Intel Desktop Board D845GVFN Technical Product Specification
Table 48. BIOS Error Messages (continued)
Error Message Explanation
Checking NVRAM..... NVRAM is being checked to see if it is valid.
Update OK! NVRAM was invalid and has been updated.
Updated Failed NVRAM was invalid but was unable to be updated.
Keyboard Error Error in the keyboard connection. Make sure keyboard is
connected properly.
KB/Interface Error Keyboard interface test failed.
Memory Size Decreased Memory size has decreased since the last boot. If no memory was
removed then memory may be bad.
Memory Size Increased Memory size has increased since the last boot. If no memory was
added there may be a problem with the system.
Memory Size Changed Memory size has changed since the last boot. If no memory was
added or removed then memory may be bad.
No Boot Device Available System did not find a device to boot.
Off Board Parity Error A parity error occurred on an off-board card. This error is followed
by an address.
On Board Parity Error A parity error occurred in onboard memory. This error is followed
by an address.
Parity Error A parity error occurred in onboard memory at an unknown
address.
NVRAM/CMOS/PASSWORD cleared by
Jumper
<CTRL_N> Pressed CMOS is ignored and NVRAM is cleared. User must enter Setup.
NVRAM, CMOS, and passwords have been cleared. The system
should be powered down and the jumper removed.
76
Error Messages and Beep Codes
4.2 Port 80h POST Codes
During the POST, the BIOS generates diagnostic progress codes (POST-codes) to I/O port 80h. If
the POST fails, execution stops and the last POST code generated is left at port 80h. This code is
useful for determining the point where an error occurred.
Displaying the POST-codes requires a PCI bus add-in card, often called a POST card. The POST
card can decode the port and display the contents on a medium such as a seven-segment display.
NOTE
The POST card must be installed in PCI bus connector 1.
The tables below offer descriptions of the POST codes generated by the BIOS. Table 49 defines
the uncompressed INIT code checkpoints, Table 50 describes the boot block recovery code
checkpoints, and Table 51 lists the runtime code uncompressed in F000 shadow RAM. Some codes
are repeated in the tables because that code applies to more than one operation.
Table 49. Uncompressed INIT Code Checkpoints
Code Description of POST Operation
D0 NMI is Disabled. Onboard KBC, RTC enabled (if present). Init code Checksum verification
starting.
D1 Keyboard controller BAT test, CPU ID saved, and going to 4 GB flat mode.
D3 Do necessary chipset initialization, start memory refresh, and do memory sizing.
D4 Verify base memory.
D5 Init code to be copied to segment 0 and control to be transferred to segment 0.
D6 Control is in segment 0. To check recovery mode and verify main BIOS checksum. If either it is
recovery mode or main BIOS checksum is bad, go to check point E0 for recovery else go to check
point D7 for giving control to main BIOS.
D7 Find Main BIOS module in ROM image.
D8 Uncompress the main BIOS module.
D9 Copy main BIOS image to F000 shadow RAM and give control to main BIOS in F000
shadow RAM.
Table 50. Boot Block Recovery Code Checkpoints
Code Description of POST Operation
E0 Onboard Floppy Controller (if any) is initialized. Compressed recovery code is uncompressed in
F000:0000 in Shadow RAM and give control to recovery code in F000 Shadow RAM. Initialize
interrupt vector tables, initialize system timer, initialize DMA controller and interrupt controller.
E8 Initialize extra (Intel Recovery) Module.
E9 Initialize floppy drive.
EA Try to boot from floppy. If reading of boot sector is successful, give control to boot sector code.
EB Booting from floppy failed, look for ATAPI (LS-120, Z ip) devices.
EC Try to boot from ATAPI. If reading of boot sector is successful, give control to boot sector code.
EF Booting from floppy and ATAPI device failed. Give two beeps. Retry the booting procedure again
(go to check point E9).
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Intel Desktop Board D845GVFN Technical Product Specification
Table 51. Runtime Code Uncompressed in F000 Shadow RAM
Code Description of POST Operation
03 NMI is Disabled. To check soft reset/power-on.
05 BIOS stack set. Going to disable cache if any.
06 POST code to be uncompressed.
07 CPU init and CPU data area init to be done.
08 CMOS checksum calculation to be done next.
0B Any initialization before keyboard BAT to be done next.
0C KB controller I/B free. To issue the BAT command to keyboard controller.
0E Any initialization after KB controller BAT to be done next.
0F Keyboard command byte to be written.
10 Going to issue Pin-23,24 blocking/unblocking command.
11 Going to check pressing of <INS> , <END> key during power-on.
12 To init CMOS if "Init CMOS in every boot" is set or <END> key is pressed. Going to disable DMA
and Interrupt controllers.
13 Video display is disabled and port-B is initialized. Chipset init about to begin.
14 8254 timer test about t o st art.
19 About to start memory refresh test.
1A Memory Refresh line is toggling. Going to check 15 µs ON/OFF time.
23 To read 8042 input port and disable Megakey GreenPC feature. Make BIOS code segment
writeable.
24 To do any setup before Int vector init.
25 Interrupt vector initialization to begin. To clear password if necessary.
27 Any initialization before setting video mode t o be done.
28 Going for monochrome mode and color mode setting.
2A Different buses init (system, static, output devices) to start if present. (See Section 4.3 for details
of different buses.)
2B To give control for any setup required before optional video ROM check.
2C To look for optional video ROM and give control.
2D To give control to do any processing after video ROM returns control.
2E If EGA/VGA not found then do display memory R/W test.
2F EGA/VGA not found. Display memory R/W test about to begin.
30 Display memory R/W test passed. About to look for the retrace checking.
31 Display memory R/W test or retrace checking failed. To do alternate Display memory R/W test.
32 Alternate Display memory R/W test passed. To look for the alternate display retrace checking.
34 Video display checking over. Display mode to be set next.
37 Display mode set. Going to display the power-on message.
38 Different buses init (input , IPL, general devices) to start if present. (See Section 4.3 for details of
different buses.)
39 Display different buses initialization error messages. (See Section 4. 3 for details of different
buses.)
3A New cursor position read and saved. To display the Hit <DEL> message.
continued
78
Error Messages and Beep Codes
Table 51. Runtime Code Uncompressed in F000 Shadow RAM (continued)
Code Description of POST Operation
40 To prepare the descriptor tables.
42 To enter in virtual mode for memory test.
43 To enable interrupts for diagnostics mode.
44 To initialize dat a to check memory wrap around at 0:0.
45 Data initialized. Going to check for memory wrap around at 0:0 and finding the total system
memory size.
46 Memory wrap around test done. Memory size calculation over. About to go for writing patterns to
test memory.
47 Pattern to be tested written in extended memory. Going to write patterns in base 640k memory.
48 Patterns written in base memory. Going to find out amount of memory below 1M memory.
49 Amount of memory below 1M found and verified. Going to find out amount of memory above 1M
memory.
4B Amount of memory above 1M found and verified. Check for soft reset and going to clear memory
below 1M for soft reset. (If power on, go to check point # 4Eh).
4C Memory below 1M cleared. (SOFT RESET) Going to clear memory above 1M.
4D Memory above 1M cleared. (SOFT RESET) Going to save the memory size. (Go to check
point # 52h).
4E Memory test started. (NOT SOFT RESET) About to display the first 64k memory size.
4F Memory size display started. This will be updated during memory test. Going for sequential and
random memory test.
50 Memory testing/initialization below 1M complete. Going to adjust displayed memory size for
relocation/shadow.
51 Memory size display adjusted due to relocation/ shadow. Memory test above 1M to follow.
52 Memory testing/initialization above 1M complete. Going to save memory size information.
53 Memory size information is saved. CPU registers are saved. Going to enter in real mode.
54 Shutdown successful, CPU in real mode. Going to disable gate A20 line and disable parity/NMI.
57 A20 address line, parity/NMI disable successful. Going to adjust memory size depending on
relocation/shadow.
58 Memory size adjusted for relocation/shadow. Going to clear Hit <DEL> message.
59 Hit <DEL> message cleared. <WAIT...> message displayed. About to start DMA and interrupt
controller test.
60 DMA page register test passed. To do DMA#1 base register test.
62 DMA#1 base register test passed. To do DMA#2 base register test.
65 DMA#2 base register test passed. To program DMA unit 1 and 2.
66 DMA unit 1 and 2 programming over. T o init ialize 8259 interrupt controller.
7F Extended NMI sources enabling is in progress.
80 Keyboard test started. Clearing output buf fer, checking for stuck key, to issue keyboard reset
command.
81 Keyboard reset error/stuck key found. To issue keyboard controller interface test command.
82 Keyboard controller interface test over. To write command byte and init circular buffer.
83 Command byte written, global data init done. To check for lock-key.
continued
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Intel Desktop Board D845GVFN Technical Product Specification
Table 51. Runtime Code Uncompressed in F000 Shadow RAM (continued)
Code Description of POST Operation
84 Lock-key checking over. To check for memory size mismatch with CMOS.
85 Memory size check done. To display soft error and check for password or bypass setup.
86 Password checked. About to do programming before setup.
87 Programming before setup complete. To uncompress SETUP code and execute CMOS setup.
88 Returned from CMOS setup program and screen is cleared. About to do programming after setup.
89 Programming after setup complete. Going to display power-on screen message.
8B First screen message displayed. <WAIT...> message displayed. PS/2 Mouse check and
extended BIOS data area allocation to be done.
8C Setup options programming after CMOS setup about to start.
8D Going for hard disk controller reset.
8F Hard disk controller reset done. Floppy setup to be done next.
91 Floppy setup complete. Hard disk setup t o be done next.
95 Init of dif ferent buses optional ROMs from C800 to start. (See Section 4.3 for details of different
buses.)
96 Going to do any init before C800 optional ROM control.
97 Any init before C800 optional ROM control is over. Optional ROM check and control will be
done next.
98 Optional ROM control is done. About t o give control to do any required processing after optional
ROM returns control and enable external cache.
99 Any initialization required after optional ROM test over. Going to setup timer data area and printer
base address.
9A Return after setting timer and printer base address. Going to set the RS-232 base address.
9B Returned after RS-232 base address. Going to do any initialization before Coprocessor test.
9C Required initialization before Coprocessor is over. Going to initialize the Coprocessor next.
9D Coprocessor initialized. Going to do any initialization after Coprocessor test.
9E Initialization after Coprocessor test is complete. Going to check extended keyboard, keyboard ID
and num-lock.
A2 Going to display any soft errors.
A3 Soft error display complete. Going to set keyboard typematic rate.
A4 Keyboard typematic rate set. To program memory wait states.
A5 Going to enable parity/NMI.
A7 NMI and parity enabled. Going to do any initialization required before giving control to optional
ROM at E000.
A8 Initialization before E000 ROM control over. E000 ROM to get control next.
A9 Returned from E000 ROM control. Going to do any initialization required after E000 optional ROM
control.
AA Initialization after E000 optional ROM control is over. Going to display the system configuration.
AB Put INT13 module runtime image to shadow.
AC Generate MP for multiprocessor support (if present).
AD Put CGA INT10 module (if present) in Shadow.
continued
80
Error Messages and Beep Codes
Table 51. Runtime Code Uncompressed in F000 Shadow RAM (continued)
Code Description of POST Operation
AE Uncompress SMBIOS module and init SMBIOS code and form the runtime SMBIOS image in
shadow.
B1 Going to copy any code to specific area.
00 Copying of code to specific area done. Going to give control to INT-19 boot loader.
4.3 Bus Initialization Checkpoints
The system BIOS gives control to the different buses at several checkpoints to do various tasks.
Table 52 describes the bus initialization checkpoints.
Table 52. Bus Initialization Checkpoints
Checkpoint Description
2A Different buses init (system, static, and output devices) to start if present.
38 Different buses init (input, IPL, and general devices) to start if present.
39 Display different buses initialization error messages.
95 Init of different buses optional ROMs from C800 to start.
While control is inside the different bus routines, additional checkpoints are output to port 80h as
WORD to identify the routines under execution. In these WORD checkpoints, the low byte of the
checkpoint is the system BIOS checkpoint from which the control is passed to the different bus
routines. The high byte of the checkpoint is the indication of which routine is being executed in the
different buses. Table 53 describes the upper nibble of the high byte and indicates the function that
is being executed.
Table 53. Upper Nibble High Byte Functions
Value Description
0 func#0, disable all devices on the bus concerned.
1 func#1, static devices init on the bus concerned.
2 func#2, output device init on the bus concerned.
3 func#3, input device init on the bus concerned.
4 func#4, IPL device init on the bus concerned.
5 func#5, general device init on the bus concerned.
6 func#6, error reporting for the bus concerned.
7 func#7, add-on ROM init for all buses.
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Intel Desktop Board D845GVFN Technical Product Specification
Table 54 describes the lower nibble of the high byte and indicates the bus on which the routines are
being executed.
Table 54. Lower Nibble High Byte Functions
Value Description
0 Generic DIM (Device Initialization Manager)
1 On-board System devices
2 ISA devices
3 EISA devices
4 ISA PnP devices
5 PCI devices
4.4 Speaker
A 47 Ω inductive speaker provides audible error code (beep code) information during POST.
For information about Refer to
The location of the onboard speaker on the Desktop Board D845GVFN Figure 1, on page 12
4.5 BIOS Beep Codes
Whenever a recoverable error occurs during POST, the BIOS displays an error message describing
the problem (see Table 55). The BIOS also issues a beep code (one long tone followed by two
short tones) during POST if the video configuration fails (a faulty video card or no card installed)
or if an external ROM module does not properly checksum to zero.
An external ROM module (for example, a video BIOS) can also issue audible errors, usually
consisting of one long tone followed by a series of short tones. For more information on the beep
codes issued, check the documentation for that external device.
There are several POST routines that issue a POST terminal error and shut down the system if they
fail. Before shutting down the system, the terminal-error handler issues a beep code signifying the
test point error, writes the error to I/O port 80h, attempts to initialize the video and writes the error
in the upper left corner of the screen (using both monochrome and color adapters).
82
Error Messages and Beep Codes
If POST completes normally, the BIOS issues one short beep before passing control to the
operating system.
Table 55. Beep Codes
Beep Description
1 Refresh failure
2 Parity cannot be reset
3 First 64 KB memory failure
4 Timer not operational
5 Not used
6 8042 GateA20 cannot be toggled
7 Exception interrupt error
8 Display memory R/W error
9 Not used
10 CMOS Shutdown register test error
11 Invalid BIOS (e.g. POST module not found, etc.)
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Intel Desktop Board D845GVFN Technical Product Specification
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