Intel D845GEBV2 Datasheet

Intel® Desktop Board
D845GEBV2/D845GERG2
Technical Product Specification
October 2002
Order Number: C14584-001
The Intel® Desktop Board D845GEBV2/D845GERG2 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 D845GEBV2/D845GERG2 Specification Update.
Revision History
Revision
-001
Revision History
Date
Intel®
First release of the
Desktop Board D845GEBV2/D845GERG2
Technical Product Specification.
October 2002
This product specification applies to only standard Intel® Desktop Boards D845GEBV2 and
D845GERG2 with BIOS identifier RG84510A.86A.
Changes to this specification will be published in the Intel Desktop Board
D845GEBV2/D845GERG2 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
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rights that relate to the presented subject matter. The furnishing of documents and other materials and information does
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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® Desktop Boards D845GEBV2 and D845GERG2 may contain design defects or errors known as errata that may
cause the product to deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be
obtained from:
Intel Corporation
P.O. Box 5937
Denver, CO 80217-9808
or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777,
Germany 44-0-1793-421-333, other countries 708-296-9333.
Intel, Pentium, Celeron, and LANDesk are registered trademarks of Intel Corporation or its subsidiaries in the United States
and other countries.
† Other names and brands may be claimed as the property of others.
Copyright  2002, Intel Corporation. All rights reserved.
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
power and environmental requirements, and the BIOS for these Intel® Desktop Boards:
D845GEBV2 and D845GERG2. It describes the standard product and available manufacturing
options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Boards
D845GEBV2 and D845GERG2 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
1
2
3
4
5
Description
A description of the hardware used on the Desktop Boards D845GEBV2 and
D845GERG2
A map of the resources of the Desktop Boards
The features supported by the BIOS Setup program
The contents of the BIOS Setup program’s menus and submenus
A description of the BIOS error messages, beep codes, and POST codes
Typographical Conventions
This section contains information about the conventions used in this specification. Not all of these
symbols and abbreviations appear in all specifications of this type.
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.
iii
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.
WARNING
Warnings indicate conditions, which if not observed, can cause personal injury.
Other Common Notation
iv
#
Used after a signal name to identify an active-low signal (such as USBP0#)
(NxnX)
When used in the description of a component, N indicates component type, xn are the relative
coordinates of its location on the Desktop Boards D845GEBV2 and D845GERG2, 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.
Contents
1 Product Description
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
1.11
1.12
1.13
1.14
Board Differences.......................................................................................................11
Overview ....................................................................................................................12
1.2.1
Feature Summary ........................................................................................12
1.2.2
Manufacturing Options .................................................................................13
1.2.3
Board Layouts ..............................................................................................14
1.2.4
Block Diagrams ............................................................................................17
Online Support ...........................................................................................................19
Operating System Support .........................................................................................19
Design Specifications .................................................................................................20
Processor ...................................................................................................................23
System Memory .........................................................................................................24
Intel® 845GE Chipset..................................................................................................26
1.8.1
Intel 845GE Graphics Subsystem ................................................................27
1.8.2
USB..............................................................................................................33
1.8.3
IDE Support .................................................................................................34
1.8.4
Real-Time Clock, CMOS SRAM, and Battery...............................................35
I/O Controller ..............................................................................................................35
1.9.1
Serial Port ....................................................................................................35
1.9.2
Parallel Port..................................................................................................35
1.9.3
Diskette Drive Controller ..............................................................................36
1.9.4
Keyboard and Mouse Interface ....................................................................36
Audio Subsystem........................................................................................................37
1.10.1 Audio Connectors.........................................................................................38
1.10.2 Audio Subsystem Software ..........................................................................38
LAN Subsystem (Optional) .........................................................................................39
1.11.1 Intel® 82562ET Platform LAN Connect Device .............................................39
1.11.2 Intel® 82540EM Gigabit Ethernet Controller .................................................39
1.11.3 RJ-45 LAN Connector with Integrated LEDs ................................................39
1.11.4 LAN Subsystem Software ............................................................................40
CNR (Optional) ...........................................................................................................40
Hardware Management Subsystem............................................................................42
1.13.1 Hardware Monitoring ASICs .........................................................................42
1.13.2 Fan Monitoring .............................................................................................44
1.13.3 Chassis Intrusion and Detection...................................................................44
Power Management ...................................................................................................44
1.14.1 ACPI.............................................................................................................45
1.14.2 Hardware Support ........................................................................................47
2 Technical Reference
2.1
2.2
2.3
Introduction.................................................................................................................53
Memory Map ..............................................................................................................53
Fixed I/O Map.............................................................................................................54
v
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
2.13
2.14
2.15
DMA Channels ...........................................................................................................55
PCI Configuration Space Map ....................................................................................55
Interrupts ....................................................................................................................56
PCI Interrupt Routing Map ..........................................................................................57
Connectors .................................................................................................................59
2.8.1
Back Panel Connectors................................................................................60
2.8.2
Internal I/O Connectors ................................................................................61
2.8.3
External I/O Connectors ...............................................................................69
Jumper Blocks............................................................................................................72
2.9.1
Front Panel Audio Connector/Jumper Block.................................................72
2.9.2
BIOS Setup Configuration Jumper Block......................................................73
Mechanical Considerations.........................................................................................74
2.10.1 D845GEBV2 Form Factor ............................................................................74
2.10.2 D845GERG2 Form Factor............................................................................75
2.10.3 I/O Shield .....................................................................................................76
Electrical Considerations ............................................................................................78
2.11.1 Power Consumption .....................................................................................78
2.11.2 Add-in Board Considerations........................................................................78
2.11.3 Standby Current Requirements ....................................................................79
2.11.4 Fan Connector Current Capability ................................................................80
2.11.5 Power Supply Considerations ......................................................................81
Thermal Considerations..............................................................................................81
Reliability ....................................................................................................................84
Environmental ............................................................................................................84
Regulatory Compliance ..............................................................................................85
2.15.1 Safety Regulations .......................................................................................85
2.15.2 EMC Regulations .........................................................................................85
2.15.3 Product Certification Markings (Board Level) ...............................................86
3 Overview of BIOS Features
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
vi
Introduction.................................................................................................................87
BIOS Flash Memory Organization ..............................................................................87
Resource Configuration ..............................................................................................88
3.3.1
PCI Autoconfiguration ..................................................................................88
3.3.2
PCI IDE Support...........................................................................................88
System Management BIOS (SMBIOS) .......................................................................89
Legacy USB Support ..................................................................................................89
BIOS Updates ............................................................................................................90
3.6.1
Language Support........................................................................................90
3.6.2
Custom Splash Screen.................................................................................91
Recovering BIOS Data ...............................................................................................91
Boot Options...............................................................................................................92
3.8.1
CD-ROM Boot ..............................................................................................92
3.8.2
Network Boot................................................................................................92
3.8.3
Booting Without Attached Devices ...............................................................92
3.8.4
Changing the Default Boot Device During POST..........................................92
Contents
Fast Booting Systems with Intel® Rapid BIOS Boot ....................................................93
3.9.1
Peripheral Selection and Configuration ........................................................93
3.9.2
Intel Rapid BIOS Boot ..................................................................................93
3.10 BIOS Security Features..............................................................................................94
3.9
4 BIOS Setup Program
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
Introduction.................................................................................................................95
Maintenance Menu .....................................................................................................96
Main Menu..................................................................................................................97
Advanced Menu..........................................................................................................98
4.4.1
PCI Configuration Submenu.........................................................................99
4.4.2
Boot Configuration Submenu .....................................................................100
4.4.3
Peripheral Configuration Submenu.............................................................101
4.4.4
IDE Configuration Submenu.......................................................................103
4.4.5
Diskette Configuration Submenu................................................................106
4.4.6
Event Log Configuration Submenu.............................................................107
4.4.7
Video Configuration Submenu....................................................................108
4.4.8
USB Configuration Submenu .....................................................................109
4.4.9
Chipset Configuration Submenu.................................................................110
4.4.10 Fan Control Configuration Submenu ..........................................................112
Security Menu ..........................................................................................................113
Power Menu .............................................................................................................114
4.6.1
ACPI Submenu ..........................................................................................114
Boot Menu ................................................................................................................115
4.7.1
Boot Device Priority Submenu....................................................................116
4.7.2
Hard Disk Drives Submenu ........................................................................117
4.7.3
Removable Devices Submenu ...................................................................117
4.7.4
ATAPI CD-ROM Drives Submenu ..............................................................118
Exit Menu .................................................................................................................118
5 Error Messages and Beep Codes
5.1
5.2
5.3
5.4
5.5
BIOS Error Messages...............................................................................................119
Port 80h POST Codes..............................................................................................121
Bus Initialization Checkpoints ...................................................................................125
Speaker ....................................................................................................................126
BIOS Beep Codes ....................................................................................................126
vii
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Figures
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23.
Desktop Board D845GEBV2 Components .................................................................14
Desktop Board D845GERG2 Components.................................................................15
Desktop Board D845GERG2 Components (with Gigabit Ethernet LAN option) ..........16
Block Diagram ............................................................................................................17
Block Diagram of the Desktop Board D845GEBV2 with the Gigabit Ethernet
LAN option..................................................................................................................18
Intel 845GE Chipset Block Diagram ...........................................................................26
USB Port Configuration ..............................................................................................33
Audio Subsystem Block Diagram................................................................................37
ICH4 and CNR Signal Interface ..................................................................................40
Thermal Monitoring.....................................................................................................43
Location of the Standby Power Indicator LED on the D845GEBV2 Board ..................51
Back Panel Connectors ..............................................................................................60
Audio, Power, and Hardware Control Connectors ......................................................62
Audio, Power, and Hardware Control Connectors on the Desktop Board
D845GERG2 with the Gigabit Ethernet LAN option ....................................................63
D845GEBV2 Add-in Board and Peripheral Interface Connectors ...............................67
D845GERG2 Add-in Board and Peripheral Interface Connectors...............................68
External I/O Connectors .............................................................................................69
Location of the Jumper Blocks....................................................................................72
Desktop Board D845GEBV2 Dimensions ...................................................................74
Desktop Board D845GERG2 Dimensions ..................................................................75
I/O Shield Dimensions (for Desktop Boards with the LAN Subsystem) .......................76
I/O Shield Dimensions (for Desktop Boards with no LAN Subsystem) ........................77
Localized High Temperature Zones............................................................................82
Tables
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
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16.
17.
viii
Summary of Board Differences...................................................................................11
Feature Summary.......................................................................................................12
Manufacturing Options ...............................................................................................13
Specifications .............................................................................................................20
Supported Processors ................................................................................................23
Supported DDR DIMM Configurations ........................................................................25
Supported System Bus Frequency / Memory Speed Combinations............................25
Direct Draw Supported Modes....................................................................................28
Video BIOS Video Modes Supported for Analog CRTs...............................................29
Supported Configuration Modes .................................................................................30
Details of bpp Configuration Modes............................................................................31
10/100 Ethernet LAN Connector LED States..............................................................40
10/100/1000 Ethernet LAN Connector LED States .....................................................40
Effects of Pressing the Power Switch .........................................................................45
Power States and Targeted System Power ................................................................46
Wake-up Devices and Events.....................................................................................47
Fan Connector Function/Operation for Desktop Boards with a Hardware
Monitoring ASIC .........................................................................................................48
Contents
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64.
Fan Connector Function/Operation for Desktop Boards with a Hardware
Monitoring and Fan Control ASIC ...............................................................................49
System Memory Map..................................................................................................53
I/O Map ......................................................................................................................54
DMA Channels ...........................................................................................................55
PCI Configuration Space Map ....................................................................................55
Interrupts ....................................................................................................................56
PCI Interrupt Routing Map ..........................................................................................58
Front Panel Audio Connector .....................................................................................64
Auxiliary Line In Connector.........................................................................................64
Rear Chassis Fan Connector .....................................................................................64
ATAPI CD-ROM Connector ........................................................................................64
ATX12V Power Connector..........................................................................................65
Processor Fan Connector...........................................................................................65
Main Power Connector ...............................................................................................66
Chassis Intrusion Connector.......................................................................................66
Front Chassis Fan Connector .....................................................................................66
SCSI LED Connector..................................................................................................68
Front Panel USB Connector .......................................................................................69
Front Panel Connector ...............................................................................................70
States for a One-Color Power LED.............................................................................71
States for a Two-Color Power LED.............................................................................71
Auxiliary Front Panel Power/Sleep/Message-Waiting LED Connector ........................71
Front Panel Audio Connector/Jumper Block ...............................................................73
BIOS Setup Configuration Jumper Settings................................................................73
Power Usage..............................................................................................................78
Standby Current Requirements ..................................................................................79
Fan Connector Current Capability ..............................................................................80
Thermal Considerations for Components ...................................................................83
Desktop Board D845GEBV2/D845GERG2 Environmental Specifications ..................84
Safety Regulations .....................................................................................................85
EMC Regulations........................................................................................................85
Boot Device Menu Options .........................................................................................92
Supervisor and User Password Functions ..................................................................94
BIOS Setup Program Menu Bar .................................................................................95
BIOS Setup Program Function Keys ..........................................................................96
Maintenance Menu .....................................................................................................96
Main Menu..................................................................................................................97
Advanced Menu..........................................................................................................98
PCI Configuration Submenu .......................................................................................99
Boot Configuration Submenu....................................................................................100
Peripheral Configuration Submenu...........................................................................101
IDE Configuration Submenu .....................................................................................103
Primary/Secondary IDE Master/Slave Submenus.....................................................104
Diskette Configuration Submenu ..............................................................................106
Event Log Configuration Submenu ...........................................................................107
Video Configuration Submenu ..................................................................................108
USB Configuration Submenu....................................................................................109
ix
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
65.
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x
Chipset Configuration Submenu ...............................................................................110
Fan Control Configuration Submenu ........................................................................112
Security Menu ..........................................................................................................113
Power Menu .............................................................................................................114
ACPI Submenu.........................................................................................................114
Boot Menu ................................................................................................................115
Boot Device Priority Submenu ..................................................................................116
Hard Disk Drives Submenu ......................................................................................117
Removable Devices Submenu..................................................................................117
ATAPI CD-ROM Drives Submenu ............................................................................118
Exit Menu .................................................................................................................118
BIOS Error Messages...............................................................................................119
Uncompressed INIT Code Checkpoints....................................................................121
Boot Block Recovery Code Checkpoints ..................................................................121
Runtime Code Uncompressed in F000 Shadow RAM ..............................................122
Bus Initialization Checkpoints ...................................................................................125
Upper Nibble High Byte Functions............................................................................125
Lower Nibble High Byte Functions............................................................................126
Beep Codes..............................................................................................................127
1 Product Description
What This Chapter Contains
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
1.11
1.12
1.13
1.14
Board Differences.......................................................................................................11
Overview ....................................................................................................................12
Online Support ...........................................................................................................19
Operating System Support .........................................................................................19
Design Specifications .................................................................................................20
Processor ...................................................................................................................23
System Memory .........................................................................................................24
Intel® 845GE Chipset..................................................................................................26
I/O Controller ..............................................................................................................35
Audio Subsystem........................................................................................................37
LAN Subsystem (Optional) .........................................................................................39
CNR (Optional) ...........................................................................................................40
Hardware Management Subsystem............................................................................42
Power Management ...................................................................................................44
1.1 Board Differences
This TPS describes these Intel® Desktop Boards: D845GEBV2 and D845GERG2. The Desktop
Boards are identical with the exception of the items listed in Table 1.
Table 1.
Summary of Board Differences
D845GEBV2
• ATX Form Factor (12.00 inches by 8.20 inches)
• Six PCI bus connectors
D845GERG2
• microATX Form Factor (9.60 inches by 8.20 inches)
• Three PCI bus connectors
✏
NOTE
Most of the illustrations in this document show only the Desktop Board D845GEBV2. When there
are significant differences between the two Desktop Boards, illustrations of both boards are
provided.
11
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.2 Overview
1.2.1
Feature Summary
Table 2 summarizes the major features of the Desktop Boards D845GEBV2 and D845GERG2.
Table 2.
Feature Summary
Form Factor
D845GEBV2: ATX (12.00 inches by 8.20 inches)
D845GERG2: microATX (9.60 inches by 8.20 inches)
Processor
• Support for an Intel® Pentium® 4 processor in an mPGA478 socket with a
400/533 MHz system bus
• Support for an Intel® Celeron® processor in an mPGA478 socket with a
400 MHz system bus
Memory
• Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for single-sided or double-sided DIMMs (DDR333/266)
• Support for up to 2 GB system memory
NOTE: The Desktop Boards D845GEBV2/D845GERG2 have been designed to
support DIMMs based on 512 Mbit technology for a maximum onboard
capacity of up to 2 GB, but this technology has not been validated (currently
validated up to 1.0 GB) on this board. Please refer to the following Intel
web sites.
For the Desktop Board D845GEBV2:
http://developer.intel.com/design/motherbd/bv2/bv2_mem.htm
For the Desktop Board D845GERG2:
http://developer.intel.com/design/motherbd/rg2/rg2_mem.htm
Chipset
Intel® 845GE Chipset, consisting of:
• Intel® 82845GE Graphics and Memory Controller Hub (GMCH)
• Intel® 82801DB I/O Controller Hub (ICH4)
• 4 Mbit Firmware Hub (FWH)
Video
• Intel® Extreme Graphics controller
• AGP connector supporting 1x, 2x, and 4x AGP cards (1.5 V only) or an AGP
Digital Display (ADD) card
• Integrated retention mechanism
Audio
Audio subsystem for AC ‘97 processing using the Analog Devices AD1981B codec
I/O Control
SMSC LPC47M172 LPC Bus I/O controller
USB
Support for USB 2.0 devices
Peripheral
Interfaces
• Up to six USB ports
• One serial port
• One parallel port
• Two IDE interfaces with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2† keyboard and mouse ports
• Three fan connectors
continued
12
Product Description
Table 2.
Feature Summary (continued)
• Intel/AMI BIOS (resident in the 4 Mbit FWH)
BIOS
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
• Support for PCI Local Bus Specification Revision 2.2
Instantly Available
PC Technology
• Suspend to RAM support
• Wake on PCI, CNR, RS-232, front panel, PS/2 devices, and USB ports
• D845GEBV2: Six PCI bus add-in card connectors (SMBus routed to PCI bus
connector 2)
Expansion
Capabilities
• D845GERG2: Three PCI bus add-in card connectors (SMBus routed to PCI bus
connector 2)
For information about
Refer to
The board’s compliance level with ACPI, Plug and Play, and SMBIOS
Section 1.5, page 20
1.2.2
Manufacturing Options
Table 3 describes the manufacturing options on the Desktop Boards D845GEBV2 and
D845GERG2. 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 3.
Manufacturing Options
CNR
One Communication and Networking Riser (CNR) connector (slot shared with
PCI bus connector 6 on the Desktop Board D845GEBV2 and with PCI bus connector
3 on the Desktop Board D845GERG2)
Hardware Monitor
Subsystem
• Voltage sense to detect out of range power supply voltages
• Thermal sense to detect out of range thermal values
• Three fan sense inputs used to monitor fan activity
• Fan speed control
• Hardware monitoring and fan control ASIC
#
10/100 LAN
Intel® 82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device
10/100/1000 LAN
Intel® 82540EM 10/100/1000 Gigabit Ethernet Controller (Desktop Board
D845GERG2 only)
For information about
Refer to
Available configurations for the Desktop Boards D845GEBV2 and
D845GERG2
Section 1.3, page 19
INTEGRATOR’S NOTE
The LAN and the CNR manufacturing options are mutually exclusive.
13
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.2.3
Board Layouts
Figure 1 shows the location of the major components on the Desktop Board D845GEBV2.
A B
C
D
E
F
G
H
DD
I
CC
BB
J
K
AA
Z
L
Y
W
X
V UTS
R
Q
P
O
N
M
OM13576
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
Audio codec
Front panel audio connector
Auxiliary line-in connector
Intel 82562ET 10/100 Mbit/sec (PLC) device (Optional)
Rear chassis fan connector
ATAPI CD-ROM connector
Back panel connectors
+12V power connector (ATX12V)
mPGA478 processor socket
Processor fan connector
Intel 82845GE Graphics and Memory Controller Hub
(GMCH)
DIMM sockets
I/O Controller
Power connector
Diskette drive connector
P
Q
R
S
T
U
V
W
X
Y
Z
IDE connectors
Speaker
Battery
SCSI LED connector
Chassis intrusion connector
Front chassis fan connector
BIOS Setup configuration jumper block
Auxiliary front panel power LED connector
4 Mbit Firmware Hub (FWH)
Front panel connector
Intel 82801DB I/O Controller Hub (ICH4)
AA
BB
CC
DD
Front panel USB connector
AGP connector
PCI bus add-in card connectors
CNR connector (optional)
Figure 1. Desktop Board D845GEBV2 Components
14
Product Description
Figure 2 shows the location of the major components on the Desktop Board D845GERG2.
A B
C
D
G
F
E
H
DD
I
CC
BB
J
K
AA
Z
L
Y
W
X
V UTS
R
Q
P
O
N
M
OM15021
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
Audio codec
Front panel audio connector
Auxiliary line-in connector
Intel 82562ET 10/100 Mbit/sec (PLC) device (Optional)
Rear chassis fan connector
ATAPI CD-ROM connector
Back panel connectors
+12V power connector (ATX12V)
mPGA478 processor socket
Processor fan connector
Intel 82845GE Graphics and Memory Controller Hub
(GMCH)
DIMM sockets
I/O Controller
Power connector
Diskette drive connector
P
Q
R
S
T
U
V
W
X
Y
Z
IDE connectors
Speaker
Battery
SCSI LED connector
Chassis intrusion connector
Front chassis fan connector
BIOS Setup configuration jumper block
Auxiliary front panel power LED connector
4 Mbit Firmware Hub (FWH)
Front panel connector
Intel 82801DB I/O Controller Hub (ICH4)
AA
BB
CC
DD
Front panel USB connector
AGP connector
PCI bus add-in card connectors
CNR connector (optional)
Figure 2. Desktop Board D845GERG2 Components
15
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Figure 3 shows the location of the major components on the Desktop Board D845GERG2 that
includes the Gigabit Ethernet LAN option. The callouts in Figure 2 and Figure 3 are identical,
except as follows:
•
•
In Figure 3, the auxiliary line in connector (callout “C”) has been moved
In Figure 3, callout “D” highlights the Intel 82540EM Gigabit Ethernet LAN Controller
A B
C
D
G
F
E
H
DD
I
CC
BB
J
K
AA
Z
L
Y
W
X
V UTS
R
Q
P
O
N
M
OM15117
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
Audio codec
Front panel audio connector
Auxiliary line-in connector
Intel 82540EM Gigabit Ethernet LAN Controller
Rear chassis fan connector
ATAPI CD-ROM connector
Back panel connectors
+12V power connector (ATX12V)
mPGA478 processor socket
Processor fan connector
Intel 82845GE GMCH
DIMM sockets
I/O Controller
Power connector
Diskette drive connector
P
Q
R
S
T
U
V
W
X
Y
Z
AA
BB
CC
DD
IDE connectors
Speaker
Battery
SCSI LED connector
Chassis intrusion connector
Front chassis fan connector
BIOS Setup configuration jumper block
Auxiliary front panel power LED connector
4 Mbit Firmware Hub (FWH)
Front panel connector
Intel 82801DB I/O Controller Hub (ICH4)
Front panel USB connector
AGP connector
PCI bus add-in card connectors
CNR connector (optional)
Figure 3. Desktop Board D845GERG2 Components (with Gigabit Ethernet LAN option)
16
Product Description
1.2.4
Block Diagrams
Figure 4 is a block diagram of the major functional areas of the Desktop Boards D845GEBV2 and
D845GERG2. See Figure 7 on page 33 for USB port routing.
Back Panel/
Front Panel
USB Ports
= connector or socket
USB
Serial Ports
Primary/
Secondary IDE
mPGA478
Processor Socket
Parallel Port
LPC Bus
I/O
Controller
UDMA 33 and
ATA-66/100
PS/2 Mouse
PS/2 Keyboard
Diskette Drive
Connector
System Bus
(400/533 MHz)
LPC
Bus
AGP
Interface
4X AGP
Connector
(1.5 V only)
Intel 82845GE
Graphics and
Memory Controller
Hub (GMCH)
AHA
Bus
Intel 82801DB
I/O Controller Hub
(ICH4)
4 Mbit
Firmware Hub
(FWH)
Intel 845GE Chipset
VGA
Port
Physical
Layer
Interface
(Optional)
Display
Interface
LAN
Connector
(Optional)
Memory Bus
DIMM Banks (2)
SMBus
CSMA/CD
Unit Interface
PCI Bus
AC Link
CNR
Connector
(Optional)
SMBus
PCI Slot 1
PCI Slot 2
Line In
SMBus
Line Out
PCI Slot 3
AD1981B
Audio Codec
PCI Slot 4
PCI Slot 5
PCI Slot 6
Mic In
Auxiliary Line In
D845GEBV2
Only
Hardware
Management
ASIC
CD-ROM
OM14831
Figure 4. Block Diagram
17
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Figure 5 is a block diagram of the major functional areas of the Desktop Board D845GEBV2 with
the Gigabit Ethernet LAN option. See Figure 7 on page 33 for USB port routing.
Back Panel/
Front Panel
USB Ports
= connector or socket
USB
Serial Ports
Primary/
Secondary IDE
mPGA478
Processor Socket
UDMA 33 and
ATA-66/100
Parallel Port
LPC Bus
I/O
Controller
PS/2 Mouse
PS/2 Keyboard
System Bus
(400/533 MHz)
Diskette Drive
Connector
LPC
Bus
AGP
Interface
Intel 82845GE
Graphics and
Memory Controller
Hub (GMCH)
4X AGP
Connector
(1.5 V only)
VGA
Port
AHA
Bus
Intel 82801DB
I/O Controller Hub
(ICH4)
4 Mbit
Firmware Hub
(FWH)
Intel 845GE Chipset
Display
Interface
SMBus
Memory Bus
Hardware
Management
ASIC
DIMM Banks (2)
SMBus
PCI Bus
CSMA/CD
Unit Interface
CNR
Connector
(Optional)
AC Link
SMBus
PCI Slot 1
PCI Slot 2
Line In
SMBus
Line Out
PCI Slot 3
LAN
Connector
AD1981B
Audio Codec
Intel
82540EM
Gigabit
Ethernet
LAN
Controller
Mic In
Auxiliary Line In
CD-ROM
PCI Bus
SMBus
OM15119
Figure 5. Block Diagram of the Desktop Board D845GEBV2 with the
Gigabit Ethernet LAN option
18
Product Description
1.3 Online Support
To find information about…
Visit this World Wide Web site:
Intel Desktop Boards D845GEBV2 and
D845GERG2 under “Desktop Board
Products” or “Desktop Board Support”
http://www.intel.com/design/motherbd
Available configurations for the Desktop
Board D845GEBV2
http://developer.intel.com/design/motherbd/bv2/bv2_available.htm
Available configurations for the Desktop
Board D845GERG2
http://developer.intel.com/design/motherbd/rg2/rg2_available.htm
Processor data sheets
http://www.intel.com/design/litcentr
ICH4 addressing
http://developer.intel.com/design/chipsets/datashts
http://support.intel.com/support/motherboards/desktop
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
1.4 Operating System Support
The Desktop Boards D845GEBV2 and D845GERG2 support drivers for all of the onboard
hardware and subsystems under the following operating systems:
•
•
•
•
•
✏
Windows† XP
Windows ME
Windows 2000
Windows NT† 4.0
Microsoft Windows 98 SE
For information about
Refer to
Supported drivers
Section 1.3
NOTE
Third party vendors may offer other drivers.
✏
NOTE
USB 2.0 support has been tested with Windows 2000 and Windows XP drivers and is not currently
supported by any other operating system.
19
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.5 Design Specifications
Table 4 lists the specifications applicable to the Desktop Boards D845GEBV2 and D845GERG2.
Table 4.
Specifications
Reference
Name
Specification
Title
Version, Revision Date,
and Ownership
The information is
available from…
AC ’97
Audio Codec ’97
Revision 2.2,
September 2000,
Intel Corporation.
ftp://download.intel.com/ial/
scalableplatforms/
ac97r22.pdf
ACPI
Advanced Configuration and
Power Interface
Specification
Version 2.0,
July 27, 2000,
Compaq Computer
Corporation,
Intel Corporation,
Microsoft Corporation,
Phoenix Technologies
Limited, and
Toshiba Corporation.
http://www.acpi.info/spec.htm
AGP
Accelerated Graphics Port
Interface Specification
Revision 2.0,
May 4, 1998,
Intel Corporation.
http://www.agpforum.org/
specs_specs.htm
AMI BIOS
AMIBIOS Desktop Core 8.0
AMIBIOS 8.0,
2001,
American Megatrends, Inc.
http://www.ami.com/support/
doc/amibios8.pdf
ATA/
ATAPI-5
Information Technology-AT
Attachment with Packet
Interface - 5 (ATA/ATAPI-5)
Revision 3,
February 29, 2000,
Contact: T13 Chair,
Seagate Technology.
http://www.t13.org
ATX
ATX Specification
Version 2.03,
December 1998,
Intel Corporation.
http://www.formfactors.org/
developer/specs/atx/
atxspecs.htm
ATX12V
ATX/ATX12V Power Supply
Design Guide
Version 1.2,
August 2000,
Intel Corporation.
http://www.formfactors.org/
developer/specs/atx/
atxspecs.htm
BIS
Boot Integrity Services (BIS)
Application Programming
Interface (API)
Version 1.0,
August 4, 1999,
Intel Corporation.
http://www.intel.com/labs/
manage/wfm/wfmspecs.htm
CNR
Communication and
Network Riser (CNR)
Specification
Revision 1.2,
November 8, 2001,
Intel Corporation.
http://developer.intel.com/
technology/cnr/index.htm
continued
20
Product Description
Table 4.
Specifications (continued)
Reference
Name
Specification
Title
Version, Revision Date and
Ownership
The information is
available from…
DDR
SDRAM
Double Data Rate (DDR)
SDRAM Specification
Version 1.0,
June 2000,
JEDEC Solid State Technology
Association.
http://www.jedec.org/
Design Specification for
a 184 Pin DDR
Unbuffered DIMM
Revision 1.0,
October 2001,
JEDEC Solid State Technology
Association.
http://www.jedec.org/
Intel ® JEDEC DDR
200/266 Unbuffered
DIMM Specification
Addendum
Revision 0.9,
September 27, 2001,
Intel Corporation.
http://developer.intel.com/
technology/memory/
index.htm
EHCI
Enhanced Host
Controller Interface
Specification for
Universal Serial Bus
Revision 1.0,
March 12, 2002,
Intel Corporation.
http://developer.intel.com/
technology/usb/download/
ehci-r10.pdf
EPP
IEEE Std 1284.1-1997
(Enhanced Parallel Port)
Version 1.7,
1997,
Institute of Electrical and
Electronic Engineers.
http://standards.ieee.org/
reading/ieee/std_public/
description/busarch/
1284.1-1997_desc.html
El Torito
Bootable CD-ROM
Format Specification
Version 1.0,
January 25, 1995,
Phoenix Technologies Limited
and International Business
Machines Corporation.
http://www.phoenix.com/
PlatSS/products/specs.html
Front Panel
Front Panel I/O
Connectivity Design
Guide
Version 1.0,
October 2000,
Intel Corporation.
http://www.formfactors.org/
formfactors/
front_panel_io.htm
LPC
Low Pin Count Interface
Specification
Revision 1.0,
September 29, 1997,
Intel Corporation.
http://www.intel.com/
design/chipsets/industry/
lpc.htm
MicroATX
microATX Motherboard
Interface Specification
Version 1.0,
December 1997,
Intel Corporation.
http://www.formfactors.org/
developer/specs/microatx/
microatxspecs.htm
PCI
PCI Local Bus
Specification
Revision 2.2,
December 18, 1998,
PCI Special Interest Group.
http://www.pcisig.com/
specifications
PCI Bus Power
Management Interface
Specification
Revision 1.1,
December 18, 1998,
PCI Special Interest Group.
http://www.pcisig.com/
specifications
Plug and Play BIOS
Specification
Version 1.0a,
May 5, 1994,
Compaq Computer Corporation,
Phoenix Technologies Limited,
and Intel Corporation.
http://www.microsoft.com/
hwdev/tech/PnP/
default.asp
Plug and
Play
continued
21
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 4.
22
Specifications (continued)
Reference
Name
Specification
Title
Version, Revision Date
and Ownership
The information is
available from…
PXE
Preboot Execution
Environment
Version 2.1,
September 20, 1999,
Intel Corporation.
ftp://download.intel.com/ial/
wfm/pxespec.pdf
SFX
SFX/SFX12V Power
Supply Design Guide
Version 2.0,
May 2001,
Intel Corporation.
http://www.formfactors.org/
developer/specs/sfx/
sfx12v.pdf
SMBIOS
System Management
BIOS
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.
http://www.dmtf.org/
download/standards/
DSP0119.pdf
UHCI
Universal Host Controller
Interface Design Guide
Revision 1.1,
March 1996,
Intel Corporation.
http://www.usb.org/
developers/docs.html
USB
Universal Serial Bus
Specification
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.
http://www.usb.org/
developers/docs.html
WfM
Wired for Management
Baseline
Version 2.0,
December 18, 1998,
Intel Corporation.
http://www.intel.com/labs/
manage/wfm/
wfmspecs.htm
Product Description
1.6 Processor
✏
NOTE
Refer to Thermal Considerations (Section 2.12, page 81) for important information when using an
Intel Pentium 4 processor operating above 2.80 GHz with this Intel desktop board.
CAUTION
Use only the processors listed below. Use of unsupported processors can damage the board, the
processor, and the power supply. See Intel’s World Wide Web site for the most up-to-date list of
supported processors for these boards.
The board provides an mPGA478 processor socket. Table 5 lists the supported processors. All
supported onboard memory can be cached. See the processor’s data sheet for cachability limits.
Table 5.
#
Supported Processors
Processor Family
Designation
System Bus Frequency L2 Cache Size
Pentium®
2.80, 2.66, 2.53, 2.40B,
and 2.26 GHz
533 MHz
512 KB
Pentium 4 processor
2.60, 2.50, 2.40, 2.20, 2A, 400 MHz
1.80A, and 1.60A GHz
512 KB
Pentium 4 processor
2, 1.90, 1.80, 1.70, 1.60,
1.50, and 1.40 GHz
400 MHz
256 KB
Celeron® processor
1.80, and 1.70 GHz
400 MHz
128 KB
4 processor
INTEGRATOR’S NOTES
•
•
Use only ATX12V-compliant power supplies with the Desktop Board D845GEBV2 and only
ATX12V- or SFX12V-compliant power supplies with the Desktop Board D845GERG2.
ATX12V and SFX12V 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
and SFX12V 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 7 on page 25 for a list of supported system bus frequency and memory speed
combinations.
For information about
Refer to
Processor support
Section 1.3, page 19
Power supply connectors
Section 2.8.2.2, page 62
23
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.7 System Memory
The Desktop Boards D845GEBV2 and D845GERG2 both have two DIMM sockets and support
the following memory features:
•
•
•
•
•
•
2.5 V (only) 184-pin DDR SDRAM DIMMs with gold-plated contacts
Unbuffered, unregistered single-sided or double-sided DIMMs
Maximum total system memory: 2 GB; minimum total system memory: 64 MB
DDR333/266 MHz SDRAM DIMMs only
Serial Presence Detect (SPD)
Suspend to RAM
CAUTION
Do not use ECC DIMMs with these Desktop Boards. Using ECC DIMMs could damage the
Desktop Board.
#
✏
INTEGRATOR’S NOTES
•
Registered DIMMs are not supported.
•
Double-sided x16 DIMMs are not supported.
•
Remove the AGP video card before installing or upgrading memory to avoid interference
with the memory retention mechanism.
•
These Desktop Boards have been designed to support DIMMs based on 512 Mbit
technology for a maximum onboard capacity of up to 2 GB, but this technology has not
been validated (currently validated up to 1.0 GB) on this board. Please refer to the
following Intel web sites for the latest lists of tested memory:
For the Desktop Board D845GEBV2:
http://developer.intel.com/design/motherbd/bv2/bv2_mem.htm
For the Desktop Board D845GERG2:
http://developer.intel.com/design/motherbd/rg2/rg2_mem.htm
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.
24
For information about
Refer to
Obtaining DDR SDRAM specifications
Section 1.5, page 20
Obtaining the PC Serial Presence Detect (SPD) Specification
Section 1.5, page 20
Product Description
Table 6 lists the supported DDR DIMM configurations.
Table 6.
Supported DDR DIMM Configurations
DIMM
Capacity
Configuration
(Note 1)
DDR SDRAM
Density
DDR SDRAM Organization
Front-side/Back-side
Number of DDR
SDRAM Devices
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
8
1024 MB
DS
512 Mbit
64 M x 8/64 M x 8
16
(Note 2)
Notes:
1. 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).
2. DDR333 1 GB (1024 MB) DIMMs have not been validated with these desktop boards.
Table 7 lists the supported system bus frequency / memory speed configurations.
Table 7.
Supported System Bus Frequency / Memory Speed Combinations
To use this type of DIMM…
The processor’s system bus frequency must be…
DDR333
533 MHz
DDR266
533 MHz or 400 MHz
25
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.8 Intel® 845GE Chipset
The Intel 845GE chipset consists of the following devices:
•
•
•
Intel 82845GE 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. The component combination
provides the chipset interfaces as shown in Figure 6.
UDMA 33
ATA-66/100
Network
System Bus
USB
845GE Chipset
82845GE
Graphics and
Memory Controller
Hub (GMCH)
AHA
Bus
82801DB
I/O Controller Hub
(ICH4)
4 Mbit Firmware
Hub (FWH)
Display
Interface
AGP
Interface
DDR
SDRAM
Bus
LPC Bus
SMBus
PCI Bus AC Link
OM14832
Figure 6. Intel 845GE Chipset Block Diagram
26
For information about
Refer to
The Intel 845GE chipset
http://developer.intel.com
Resources used by the chipset
Chapter 2
Product Description
1.8.1
Intel 845GE Graphics Subsystem
The Intel 845GE chipset contains two separate, mutually exclusive graphics options. Either the
Intel Extreme Graphics controller (contained within the 82845GE GMCH) is used, or an AGP
add-in card can be used. When an AGP add-in card is installed, the Intel Extreme Graphics
controller is disabled.
Intel® Extreme Graphics Controller
1.8.1.1
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
•
 Two multiplexed DVO port interfaces with 165 MHz pixel clocks using an AGP Digital
Display (ADD) card
Dynamic Video Memory Technology (DVMT) support up to 64 MB
For information about
Refer to
DVMT
Section 1.8.1.2, page 31
#INTEGRATOR’S NOTE
EMC emission testing of high-speed video was performed on this Desktop Board using scrolling
H’s displayed on the video monitor in accordance with ANSI C63.4-2000 documentation. The
scrolling H’s are displayed using the following font sizes:
•
For video resolutions greater than 1600 x 1200 (including 2048 x 1536 and 1920 x 1440),
a font size of 200% is used.
•
For a 1600 x 1200 video resolution, a 150% font size is used.
•
For resolutions less than 1600 x 1200, a normal or large font size is used.
All available resolutions are tested using the highest available color depth and monitor refresh
rate.
27
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 8 lists the Direct Draw supported modes.
Table 8.
Resolution
Color Palette
Refresh Frequency (Hz)
Notes
320 x 200
256 colors
70
Y
64 K colors
70
3
16 M colors
70
3
256 colors
70
Y
64 K colors
70
3
16 M colors
70
3
256 colors
70
Y
64 K colors
70
3
3
320 x 240
352 x 480
352 x 576
400 x 300
512 x 384
640 x 400
Notes:
28
Direct Draw Supported Modes
16 M colors
70
256 colors
70
Y
64 K colors
70
3
16 M colors
70
3
256 colors
70
Y
64 K colors
70
3
16 M colors
70
3
256 colors
70
Y
64 K colors
70
3
16 M colors
70
3
256 colors
70
Y
64 K colors
70
3
16 M colors
70
Y = Supported in driver without
3 = Direct3D and OpenGL
Direct3D†
3
and
OpenGL†
Product Description
Table 9 lists the video BIOS video modes supported by the graphics subsystem.
Table 9.
Video BIOS Video Modes Supported for Analog CRTs
Resolution
Color Palette
Available Refresh
Frequencies (Hz)
Notes
320 x 200
16 colors
70
T, G, B
256 colors
70
G, B
320 x 350
16 colors
70
T, B
360 x 400
16 colors
70
T, B
640 x 200
16 colors
70
T, G, B
640 x 350
16 colors
70
T, G, B
640 x 480
16 colors
60
G, B
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
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
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
64 K colors
60, 75
G, B, L
1024 x 768
1600 x 1200
1920 x 1440
Notes:
T = Text mode
G = Graphics mode
B = Banked addressing mode
L = Linear addressing mode
29
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 10 lists the supported configuration modes of the graphics subsystem.
Table 10.
Supported Configuration Modes
Available Refresh
Frequencies (Hz)
Resolution
30
Supported bpp Configuration Mode
(see Table 11 for more information)
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
60
6
1280 x 1024
75
5
1280 x 1024
85, 100
4
1280 x 1024
120
3
1400 x 1050
60
6
1600 x 900
60
6
1600 x 900
75, 85
4
1600 x 900
100
3
1600 x 1200
60
4
1600 x 1200
75, 85, 100
3
1856 x 1392
60, 75
3
1920 x 1080
60
4
1920 x 1080
75, 85
3
1920 x 1200
60
3
1920 x 1440
60, 75
3
2048 x 1536
60
3
Product Description
Table 11 describes the bpp configuration mode values referenced in Table 10. In Table 11, 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 11.
Details of bpp Configuration Modes
Configuration Mode Number
Description
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 19
1.8.1.2
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/845g/
1.8.1.3
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
31
Intel Desktop Board D845GEBV2/D845GERG2 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/845g/
1.8.1.4
AGP Connector
The AGP connector supports either:
•
•
#
1x, 2x, or 4x AGP add-in cards with 1.5 V I/O
AGP Digital Display (ADD) cards
For information about
Refer to
Obtaining the Accelerated Graphics Port Interface Specification
Section 1.5, page 20
INTEGRATOR’S NOTES
•
Install memory in the DIMM sockets prior to installing the AGP video card to avoid
interference with the memory retention mechanism.
•
The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy
3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V
AGP cards.
1.8.1.5
AGP Digital Display (ADD) Card Support
The GMCH routes two 12-bit multiplexed DVO ports that are each capable of driving a 165 MHz
pixel clock to the AGP connector. The DVO ports can be paired for dual channel mode. In dual
channel mode, the GMCH is capable of driving a 24-bit 330 MHz pixel clock. When an AGP addin card is used, the Intel Extreme Graphics controller is disabled and the AGP connector operates
in AGP mode. When an ADD card is detected, the Intel Extreme Graphics controller is enabled
and the AGP connector is configured for DVO mode. DVO mode enables the DVO ports to be
accessed by an ADD card. ADD cards can support up to two display devices with the following
configurations:
•
•
•
•
#
32
TV-Out
Transition Minimized Differential Signaling (TMDS)
Low Voltage Differential Signaling (LVDS)
Single device operating in dual channel mode
INTEGRATOR’S NOTES
•
Synchronous display is not supported when one of the display devices is a TV.
•
Digital Visual Interface (DVI) support is present only when an ADD card is installed.
Product Description
1.8.2
USB
The Desktop Boards support up to six USB 2.0 ports and fully support UHCI and EHCI and use
UHCI- and EHCI-compatible drivers. For more than six USB devices, an external hub can be
connected to any of the ports.
The ICH4 provides the USB controller for all ports, as shown in Figure 7. The port arrangement is
as follows:
•
•
•
Two ports are implemented with stacked back panel connectors, adjacent to the PS/2
connectors
Two ports are implemented with stacked back panel connectors, adjacent to the audio
connectors
Two ports are routed to the front panel USB connector
82801DB
I/O Controller Hub
(ICH4)
USB
USB ports (2)
Back panel USB connectors
adjacent to the PS/2 ports
USB
USB ports (2)
Back panel USB connectors
adjacent to the audio connectors
USB
USB ports (2)
Front panel USB connectors
OM14260
Figure 7. USB Port Configuration
✏
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.
✏
NOTE
USB 2.0 support has been tested with Windows 2000 and Windows XP drivers and is not currently
supported by any other operating system.
For information about
Refer to
The location of the USB connectors on the back panel
Figure 12, page 60
The location of the front panel USB connector
Figure 17, page 69
The EHCI, front panel, UHCI, and USB specifications
Section 1.5, page 20
33
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.8.3
1.8.3.1
IDE Support
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 read transfer rates up to 100 MB/sec and write transfer rates up to 88 MB/sec.
NOTE
ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections,
noise, and inductive coupling.
The IDE interfaces also support ATAPI devices (such as CD-ROM drives) and ATA devices using
the transfer modes listed in Section 4.4.4.1 on page 104.
The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS)
translation modes. The drive reports the transfer rate and translation mode to the BIOS.
The Desktop Boards support Laser Servo (LS-120) diskette technology through the IDE interfaces.
An LS-120 drive can be configured as a boot device by setting the BIOS Setup program’s Boot
menu to one of the following:
•
•
ARMD-FDD (ATAPI removable media device – floppy disk drive)
ARMD-HDD (ATAPI removable media device – hard disk drive)
For information about
Refer to
The location of the IDE connectors on the D845GERG2 board
Figure 15, page 67
The location of the IDE connectors on the D845GEBV2 board
Figure 16, page 68
1.8.3.2
SCSI LED Connector
The SCSI LED connector is a 1 x 2-pin connector that allows an add-in SCSI controller (or other
add-in card hard drive controller) to use the same LED as the onboard IDE controller. For proper
operation, this connector should be wired to the LED output of the add-in SCSI controller. The
LED indicates when data is being read from, or written to, both the add-in SCSI controller and the
IDE controller.
34
For information about
Refer to
The location of the SCSI LED connector on the D845GERG2 board
Figure 15, page 67
The location of the SCSI LED connector on the D845GEBV2 board
Figure 16, page 68
The signal names of the SCSI LED connector
Table 34, page 68
Product Description
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.
✏
NOTE
If the battery and AC power fail, custom defaults, if previously saved, will be loaded into CMOS
RAM at power-on.
1.9 I/O Controller
The SMSC LPC47M172 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
1.9.1
Serial Port
The boards have one serial port connector located on the back panel. The serial port supports 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 12, page 60
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.
For information about
Refer to
The location of the parallel port connector
Figure 12, page 60
Setting the parallel port’s mode
Table 58, page 101
35
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
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.
For information about
Refer to
The location of the diskette drive connector on the D845GERG2 board
Figure 15, page 67
The location of the diskette drive connector on the D845GEBV2 board
Figure 16, page 68
The supported diskette drive capacities and sizes
Table 61, page 106
1.9.4
Keyboard and Mouse Interface
PS/2 keyboard and mouse connectors are located on the back panel.
✏
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.
36
For information about
Refer to
The location of the keyboard and mouse connectors
Figure 12, page 60
Product Description
1.10 Audio Subsystem
The audio subsystem consists of the following devices:
•
•
Intel 82801DB I/O Controller Hub (ICH4)
Analog Devices AD1981B audio codec
The audio subsystem includes these features:
•
•
•
Split digital/analog architecture for improved S/N (signal-to-noise) ratio: ≥ 85 dB
Power management support for ACPI 2.0 (driver dependant)
Mono/Stereo mic in pre-amp that supports dynamic, condenser, and electret microphones
The audio subsystem supports the following audio interfaces:
•
ATAPI-style connectors:
 Auxiliary line in
•
 CD-ROM
Front panel audio connector, including pins for:
 Line out
•
 Mic in (mono or stereo)
Back panel audio connectors:
 Line out
 Line in
 Mic in (mono or stereo)
Figure 8 is a block diagram of the audio subsystem.
Line In
82801DB
I/O Controller Hub
(ICH4)
Line Out
AC ’97
Link
AD1981B
Audio Codec
Mic In
Auxiliary Line In
CD-ROM
OM15116
Figure 8. Audio Subsystem Block Diagram
For information about
Refer to
Upgrading the onboard audio subsystem using a CNR audio card
Section 1.12, page 40
The front panel audio connector
Section 2.8.2.2, page 62
The back panel audio connectors
Section 2.8.1, page 60
37
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.10.1
1.10.1.1
Audio Connectors
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 13, page 62
The signal names of the front panel audio connector
Table 25, page 64
Obtaining the Front Panel I/O Connectivity Design Guide
Section 1.5, page 20
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 72 for more information.
1.10.1.2
Auxiliary Line In Connector
A 1 x 4-pin ATAPI-style connector connects the left and right channel signals of an internal audio
device to the audio subsystem.
For information about
Refer to
The location of the auxiliary line in connector
Figure 13, page 62
The signal names of the auxiliary line in connector
Table 26, page 64
1.10.1.3
ATAPI CD-ROM Audio Connector
A 1 x 4-pin ATAPI-style connector connects an internal ATAPI CD-ROM drive to the audio
mixer.
For information about
Refer to
The location of the ATAPI CD-ROM connector
Figure 13, page 62
The signal names of the ATAPI CD-ROM connector
Table 28, page 64
1.10.2
Audio Subsystem Software
Audio software and drivers are available from Intel’s World Wide Web site.
38
For information about
Refer to
Obtaining audio software and drivers
Section 1.3, page 19
Product Description
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) on the
CNR bus
PCI Power Management
 Supports ACPI technology
 Supports LAN wake capabilities
The Desktop Board D845GERG2 supports a Gigabit Ethernet Controller option, described below.
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. This physical interface may alternately be provided through the CNR connector.
The Intel 82562ET provides the following functions:
•
•
•
•
•
•
1.11.2
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
Intel® 82540EM Gigabit Ethernet Controller
The Intel 82540EM Gigabit Ethernet Controller (available only on the Desktop Board
D845GERG2) provides the following functions:
•
•
•
•
•
•
1.11.3
Gigabit Ethernet MAC and PHY layer functions in a single component
Basic 10/100/1000 Ethernet LAN connectivity
Integrated PHY for 10/100/1000 Mbit/sec full and half duplex operation
Supports RJ-45 connector with status indicator LEDs on the back panel
ACPI support
Configuration EEPROM that contains the MAC address
RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector. Table 12 describes the LED states when the
Desktop Board is powered up and the 10/100 LAN subsystem is operating.
39
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 12.
10/100 Ethernet LAN Connector LED States
LED Color
LED State
Condition
Green
Off
10 Mbit/sec data rate is selected.
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.
Table 13 describes the LED states when the Desktop Board is powered up and the 10/100/1000
LAN subsystem is operating.
Table 13.
10/100/1000 Ethernet LAN Connector LED States
LED Color
LED State
Condition
Green/Yellow
Off
10 Mbit/sec data rate is selected.
Green
100 Mbit/sec data rate is selected.
Yellow
1.11.4
Yellow
1 Gbit/sec data rate is selected.
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.
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 19
1.12 CNR (Optional)
AC ’97 Interface
Intel 82801DB
I/O Controller Hub
(ICH4)
LAN Interface
SMBus
CNR Connector
The Communication and Networking Riser (CNR) connector provides an interface that supports
the audio, modem, and LAN interfaces of the Intel 845GE chipset. Figure 9 shows the signal
interface between the riser and the ICH4.
Communication and
Networking Riser
(Up to two AC ’97 codecs
and one LAN device)
OM14262
Figure 9. ICH4 and CNR Signal Interface
40
Product Description
The interfaces supported by the CNR include the following:
•
•
•
AC ’97 interface: supports audio and/or modem functions on the CNR card.
LAN interfaces: an eight-pin interface for use with Platform LAN Connection (PLC) based
devices.
SMBus interface: provides Plug-and-Play functionality for the CNR card.
The CNR connector includes power signals required for power management and for CNR card
operation. To learn more about the CNR, refer to the CNR specification.
The onboard two-channel audio subsystem can be upgraded to four- or six-channel audio using a
CNR audio upgrade card in a slave configuration. CNR audio upgrade cards are available in
multiple configurations from several vendors supporting analog or S/P-DIF digital connections.
#
For information about
Refer to
CNR audio upgrade cards
http://developer.intel.com/technology/cnr/
INTEGRATOR’S NOTES
•
If you install a CNR card that cannot support a multichannel audio upgrade, the Desktop
Boards’ integrated audio codec will be disabled. This only applies to D845GEBV2 and
D845GERG2 boards that have both the onboard audio subsystem and a CNR.
•
The brand and type of audio codec used on the CNR card must match that of the Desktop
Boards’ codec (Analog Devices AD1981B).
•
Check with your CNR vendor to ensure that the CNR card has been tested with
ICH4-based systems.
•
There is no USB interface routed to the CNR connector.
For information about
Refer to
Obtaining the CNR specification
Section 1.5, page 20
41
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.13 Hardware Management Subsystem
The hardware management features enable the Desktop Boards to be compatible with the Wired
for Management (WfM) specification. The Desktop Board has several hardware management
features, including the following:
•
•
•
Fan monitoring and control (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 20
1.13.1
Hardware Monitoring ASICs
The Desktop Boards provide one of the following:
•
•
A hardware monitoring ASIC
A hardware monitoring and fan control ASIC
The features of these components are described in this section. Contact your Intel sales
representative to determine which type of hardware monitoring ASIC is present on your Intel
Desktop Board.
1.13.1.1
Hardware Monitoring ASIC
The features of the hardware monitoring ASIC include:
•
•
•
•
Internal ambient temperature sensor
Remote thermal diode sensor for direct monitoring of processor temperature
Power supply monitoring of four voltages (+5 V, +3.3 VSB, +1.5 V, and +VCCP) to detect
levels above or below acceptable values
SMBus interface
For information about
Refer to
The location of the fan connectors and sensors for thermal monitoring
Figure 10, page 43
1.13.1.2
Hardware Monitoring and Fan Control ASIC
The features of the hardware monitoring and fan control ASIC include:
•
•
•
•
•
42
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
Product Description
For information about
Refer to
The location of the fan connectors and sensors for thermal monitoring
Figure 10, page 43
1.13.1.3
Thermal Monitoring
Figure 10 shows the location of the sensors and fan connectors.
E
C
A
B
F
D
OM15025
Item
Description
A
Thermal diode, located on processor die
B
Ambient temperature sensor, internal to both hardware monitoring ASIC options
C
Remote ambient temperature sensor (Note)
D
Processor fan
E
Rear chassis fan
F
Front chassis fan
Note:
This sensor is present only on Desktop Boards with the hardware monitoring and fan control ASIC.
Figure 10. Thermal Monitoring
43
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.13.2
Fan Monitoring
Fan monitoring can be implemented using Intel® Active Monitor, Intel® LANDesk® Client
Manager, or third-party software. The level of monitoring and control is dependent on the
hardware monitoring ASIC used with the Desktop Board.
For information about
Refer to
The functions of the fan connectors
Section 1.14.2.2, page 48
1.13.3
Chassis Intrusion and Detection
The Desktop Boards D845GEBV2 and D845GERG2 support 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.
1.14 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
44
Product Description
1.14.1
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 the Desktop Boards D845GEBV2 and
D845GERG2 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 16 on page 47)
Support for a front panel power and sleep mode switch
Table 14 lists the system states based on how long the power switch is pressed, depending on how
ACPI is configured with an ACPI-aware operating system.
Table 14.
Effects of Pressing the Power Switch
If the system is in this state…
…and the power switch is
pressed for
…the system enters this state
Off
(ACPI G2/G5 – Soft off)
Less than four seconds
Power-on
(ACPI G0 – working state)
On
(ACPI G0 – working state)
Less than four seconds
Soft-off/Standby
(ACPI G1 – sleeping state)
On
(ACPI G0 – working state)
More than four seconds
Fail safe power-off
(ACPI G2/G5 – Soft off)
Sleep
(ACPI G1 – sleeping state)
Less than four seconds
Wake-up
(ACPI G0 – working state)
Sleep
(ACPI G1 – sleeping state)
More than four seconds
Power-off
(ACPI G2/G5 – Soft off)
For information about
Refer to
The Desktop Boards’ compliance level with ACPI
Section 1.5, page 20
45
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.14.1.1
System States and Power States
Under ACPI, the operating system directs all system and device power state transitions. The
operating system puts devices in and out of low-power states based on user preferences and
knowledge of how devices are being used by applications. Devices that are not being used can be
turned off. The operating system uses information from applications and user settings to put the
system as a whole into a low-power state.
Table 15 lists the power states supported by the Desktop Boards D845GEBV2 and D845GERG2
along with the associated system power targets. See the ACPI specification for a complete
description of the various system and power states.
Table 15.
Power States and Targeted System Power
Global States
Sleeping States
Processor
States
G0 – working
state
S0 – working
C0 – working
D0 – working
state.
Full power > 30 W
G1 – sleeping
state
S1 – Processor
stopped
C1 – stop
grant
D1, D2, D3 –
device
specification
specific.
5 W < power < 52.5 W
G1 – sleeping
state
S3 – Suspend to
RAM. Context
saved to RAM.
No power
D3 – no power
except for
wake-up logic.
Power < 5 W
(Note 2)
G1 – sleeping
state
S4 – Suspend to
disk. Context
saved to disk.
No power
D3 – no power
except for
wake-up logic.
Power < 5 W
(Note 2)
G2/S5
S5 – Soft off.
Context not saved.
Cold boot is
required.
No power
D3 – no power
except for
wake-up logic.
Power < 5 W
(Note 2)
G3 –
mechanical off
No power to the
system.
No power
D3 – no power for
wake-up logic,
except when
provided by
battery or external
source.
No power to the system.
Service can be performed
safely.
AC power is
disconnected
from the
computer.
Device States
Targeted System
Power (Note 1)
Notes:
46
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.
Product Description
1.14.1.2
Wake-up Devices and Events
Table 16 lists the devices or specific events that can wake the computer from specific states.
Table 16.
These devices/events can wake up the computer…
…from this state
CNR
S1, S3, S4, S5
LAN
S1, S3, S4, S5 (Note)
Modem (back panel Serial Port A)
S1, S3
PME# signal
S1, S3, S4, S5 (Note)
Power switch
S1, S3, S4, S5
PS/2 devices
S1, S3
RTC alarm
S1, S3, S4, S5
USB
S1, S3
Note:
✏
Wake-up Devices and Events
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
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.
1.14.2
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. Refer to Section 2.11.3 on page 79 for additional information.
The Desktop Boards D845GEBV2 and D845GERG2 provide 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.
47
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
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.
1.14.2.1
Power Connector
ATX12V- and SFX12V-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 13, page 62
The signal names of the power connector
Table 31, page 66
The BIOS Setup program’s Boot menu
Table 70, page 115
The ATX and SFX specifications
Section 1.5, page 20
1.14.2.2
Fan Connectors
Table 17 summarizes the function/operation of the fan connectors for Desktop Boards with the
hardware monitoring ASIC. Table 18 summarizes the function/operation of the fan connectors for
Desktop Boards with the hardware monitoring and fan control ASIC.
Table 17.
Fan Connector Function/Operation for Desktop Boards with a Hardware
Monitoring ASIC
Connector
Description
Processor 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.
• Wired to a fan tachometer input of the I/O controller.
Front chassis fan
• +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.
Rear chassis fan
• +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.
• Wired to a fan tachometer input of the I/O controller.
48
Product Description
Table 18.
Fan Connector Function/Operation for Desktop Boards with a Hardware
Monitoring and Fan Control ASIC
Connector
Description
Processor 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.
• Wired to a fan tachometer input of the hardware monitoring and fan control ASIC.
• Closed-loop fan control that can adjust the fan speed or switch the fans on or off
as needed.
Front chassis fan
• +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.
• Wired to a fan tachometer input of the hardware monitoring and fan control ASIC.
• Closed-loop fan control that can adjust the fan speed or switch the fans on or off
as needed.
Rear chassis fan
• +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.
• Wired to a fan tachometer input of the hardware monitoring and fan control ASIC.
• Closed-loop fan control that can adjust the fan speed or switch the fans on or off
as needed.
For information about
Refer to
The location of the fan connectors
Figure 13, page 62
The location of the fan connectors and sensors for thermal monitoring
Figure 10, on page 43
The signal names of the fan connectors
Section 2.8.2.2, page 62
1.14.2.3
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. Refer to Section 2.11.3 on
page 79 for additional information.
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 Desktop Boards D845GEBV2 and
D845GERG2 support 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
A CNR-based LAN subsystem
49
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.14.2.4
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. Refer to
Section 2.11.3 on page 79 for additional information.
Instantly Available PC technology enables the Desktop Boards D845GEBV2 and D845GERG2 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 16 on page 47 lists the devices and events that can wake the computer
from the S3 state.
The Desktop Boards D845GEBV2 and D845GERG2 support 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.
50
Product Description
1.14.2.5
+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 11 shows the location of the standby power indicator LED on the
D845GEBV2 board.
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.
CR8H1
OM13582
Figure 11. Location of the Standby Power Indicator LED on the D845GEBV2 Board
1.14.2.6
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
51
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
1.14.2.7
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.
1.14.2.8
Wake from PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1 or S3 state.
1.14.2.9
PME# Signal Wake-up Support
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).
52
2 Technical Reference
What This Chapter Contains
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
2.13
2.14
2.15
Introduction.................................................................................................................53
Memory Map ..............................................................................................................53
Fixed I/O Map.............................................................................................................54
DMA Channels ...........................................................................................................55
PCI Configuration Space Map ....................................................................................55
Interrupts ....................................................................................................................56
PCI Interrupt Routing Map ..........................................................................................57
Connectors .................................................................................................................59
Jumper Blocks............................................................................................................72
Mechanical Considerations.........................................................................................74
Electrical Considerations ............................................................................................78
Thermal Considerations..............................................................................................81
Reliability ....................................................................................................................84
Environmental ............................................................................................................84
Regulatory Compliance ..............................................................................................85
2.1 Introduction
Sections 2.2 - 2.6 contain several standalone tables. Table 19 describes the system memory map,
Table 20 shows the I/O map, Table 21 lists the DMA channels, Table 22 defines the PCI
configuration space map, and Table 23 describes the interrupts. The remaining sections in this
chapter are introduced by text found with their respective section headings.
2.2 Memory Map
Table 19.
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
53
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.3 Fixed I/O Map
Table 20.
I/O Map
Address (hex)
Size
Description
0000 - 00FF
256 bytes
0170 - 0177
01F0 - 01F7
8 bytes
8 bytes
Used by the Desktop Board D845GEBV2/D845GERG2.
Refer to the ICH4 data sheet for dynamic addressing
information.
Secondary IDE channel
Primary IDE channel
0228 - 022F (Note 1)
0278 - 027F (Note 1)
02E8 - 02EF (Note 1)
02F8 - 02FF (Note 1)
0376
0377, bits 6:0
0378 - 037F
03B0 - 03BB
03C0 - 03DF
03E8 - 03EF
03F0 - 03F5
03F6
03F8 - 03FF
04D0 - 04D1
LPTn + 400
0CF8 - 0CFB (Note 2)
0CF9 (Note 3)
0CFC - 0CFF
FFA0 - FFA7
FFA8 - FFAF
8 bytes
8 bytes
8 bytes
8 bytes
1 byte
7 bits
8 bytes
12 bytes
32 bytes
8 bytes
6 bytes
1 byte
8 bytes
2 bytes
8 bytes
4 bytes
1 byte
4 bytes
8 bytes
8 bytes
LPT3
LPT2
COM4
COM2
Secondary IDE channel command port
Secondary IDE channel status port
LPT1
Intel 82845GE GMCH
Intel 82845GE GMCH
COM3
Diskette channel 1
Primary IDE channel command port
COM1
Edge/level triggered PIC
ECP port, LPTn base address + 400h
PCI configuration address register
Turbo and reset control register
PCI configuration data register
Primary bus master IDE registers
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
Some additional I/O addresses are not available due to ICH4 address aliassing. The ICH4 data
sheet provides more information on address aliassing.
54
For information about
Refer to
Obtaining the ICH4 data sheet
Section 1.3 on page 19
Technical Reference
2.4 DMA Channels
Table 21.
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 22.
PCI Configuration Space Map
Bus
Number (hex)
Device
Number (hex)
Function
Number (hex)
Description
00
00
00
Memory controller of Intel 82845GE component
00
01
00
Host to AGP bridge (virtual P2P)
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
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
00
00
AGP add-in card
(Note 1)
08
00
LAN controller (optional)
(Note 1)
00
00
PCI bus connector 1
(Note 1)
01
00
PCI bus connector 2
(Note 1)
02
00
PCI bus connector 3
(Note 1)
03
00
PCI bus connector 4 (Note 2)
(Note 1)
04
00
PCI bus connector 5 (Note 2)
(Note 1)
05
00
PCI bus connector 6 (Note 2)
Notes:
1. Bus number = 01 when the Intel Extreme Graphics controller is used. Bus number = 02 when an AGP addin card is used.
2. Desktop Board D845GEBV2 only
55
Intel Desktop Board D845GEBV2/D845GERG2 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 23.
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 (Note 1)
4
COM1 (Note 1)
5
LPT2 (Plug and Play option)/User available
6
Diskette drive
7
LPT1 (Note 1)
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)
16
(Note 2)
USB UHCI controller 1 (through PIRQA)
17
(Note 2)
AC ’97 audio/modem/User available (through PIRQB)
18
(Note 2)
ICH4 USB controller 3 (through PIRQC)
19 (Note 2)
ICH4 USB controller 2 (through PIRQD)
20
(Note 2)
ICH4 LAN (optional) (through PIRQE)
21
(Note 2)
User available (through PIRQF)
22
(Note 2)
User available (through PIRQG)
23 (Note 2)
ICH4 USB 2.0 EHCI controller/User available (through PIRQH)
Notes:
56
1.
Default, but can be changed to another IRQ.
2.
Available in APIC mode only.
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 Boards D845GEBV2 and
D845GERG2 and therefore share the same interrupt. Table 24 shows an example of how the
PIRQ signals are routed.
For example, using Table 24 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.
57
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 24.
PCI Interrupt Routing Map
ICH4 PIRQ Signal Name
PCI Interrupt Source
PIRQA
PIRQB
AGP connector
INTA
INTB
PIRQC
PIRQD
PIRQE
PIRQF
PIRQG
PIRQH
ICH4 USB UHCI controller 1 INTA
SMBus controller
INTB
ICH4 USB UHCI controller 2
INTB
AC ’97 ICH4 Audio/Modem
INTB
ICH4 LAN
INTA
ICH4 USB UHCI controller 3
INTC
INTD
ICH4 USB 2.0 EHCI controller
PCI bus connector 1
INTD
INTA
INTB
INTC
PCI bus connector 2
INTC
INTB
INTA
INTD
INTC
INTD
PCI bus connector 3
PCI bus connector 4
(Note)
PCI bus connector 5
(Note)
PCI bus connector 6
(Note)
Note:
✏
INTD
INTC
INTC
INTA
INTA
INTB
INTB
INTA
INTD
INTA
INTB
INTB
INTD
INTC
Desktop Board D845GEBV2 only
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 23 for the
allocation of PIRQ lines to IRQ signals in APIC mode.
58
Technical Reference
2.8 Connectors
CAUTION
Only the back panel USB, front panel USB, VGA, and PS/2 connectors of the Desktop Boards
D845GEBV2 and D845GERG2 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 Desktop Board’s connectors. The connectors can be divided into these
groups:
•
Back panel I/O connectors (see page 60)
 PS/2 keyboard and mouse
 USB (four ports)
 Parallel port
 Serial port A
 LAN (optional)
•
 Audio (line out, line in, and mic in)
Internal I/O connectors (see page 61)
 Audio (auxiliary line input, ATAPI CD-ROM, and front panel audio)
 Fans
 Power
 Add-in boards (PCI and AGP)
 CNR (optional)
 IDE
 Diskette drive
 SCSI LED
•
 Chassis intrusion
External I/O connectors (see page 69)
 Front panel USB (one connector for two ports)
 Auxiliary front panel power/sleep/message-waiting LED
 Front panel (power/sleep/message-waiting LED, power switch, hard drive activity LED,
reset switch, and auxiliary front panel power LED)
✏
NOTE
When installing the D845GERG2 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.
59
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.8.1
Back Panel Connectors
Figure 12 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
I
F
C
B
D
E
G
H
J
K L M
OM13577
Item
Description
Color
A
PS/2 mouse port
Green
B
PS/2 keyboard port
Purple
C
USB port
Black
D
USB port
Black
E
Serial port A
Teal
F
Parallel port
Burgundy
G
VGA port
Dark blue
H
USB port
Black
I
LAN (optional)
Black
J
USB port
Black
K
Mic in
Pink
L
Audio line out
Lime green
M
Audio line in
Light blue
Figure 12. Back Panel Connectors
60
Technical Reference
✏
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:
•
•
2.8.2.1
Audio, power, and hardware control (see page 62)
 Auxiliary line in
 ATAPI CD-ROM
 Front panel audio
 Fans
 ATX12V power
 Main power
Add-in boards and peripheral interfaces (see page 67)
 CNR (optional)
 PCI bus
 AGP
 IDE
 Diskette drive
 SCSI LED
Expansion Slots
The board has the following expansion slots:
•
•
•
✏
One AGP connector. The AGP connector is keyed for 1.5 V AGP cards only. Do not install a
legacy 3.3 V AGP card. The AGP connector is not mechanically compatible with legacy
3.3 V AGP cards.
PCI rev 2.2 compliant local bus slots (six on the Desktop Board D845GEBV2, three on the
Desktop Board D845GERG2). The SMBus is routed to PCI bus connector 2 only (ATX
expansion slot 6). PCI add-in cards with SMBus support can access sensor data and other
information residing on the Desktop Board.
One CNR (optional), shared with PCI bus connector 6 (ATX expansion slot 1) on the Desktop
Board D845GEBV2, or with PCI bus connector 3 (ATX expansion slot 1) on the Desktop
Board D845GERG2.
NOTE
This document references back-panel slot numbering with respect to processor location on the
board. The AGP slot is not numbered. PCI slots are identified as PCI slot #x, starting with the
slot closest to the processor. The CNR slot shares an ATX expansion; slot 6 on the D845GEBV2
board and slot 3 on the D845GERG2 board. The ATX/MicroATX specifications identify expansion
slot locations with respect to the far edge of a full-sized ATX chassis. The ATX specification and
the board’s silkscreen are opposite and could cause confusion. The ATX numbering convention is
made without respect to slot type (PCI vs. AGP), but refers to an actual slot location on a chassis.
Figure 15 (page 67) and Figure 16 (page 68) illustrate the board’s PCI slot numbering.
61
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.8.2.2
Audio, Power, and Hardware Control Connectors
Figure 13 shows the location of the audio, power, and hardware control connectors.
B
A
C D
4
1
2
9
10
E
1
4
1
1
3
1 2
3
4
1
F
3
1 3
11
1
20
10
1
I H
G
OM13578
Item
Description
For more information see:
A
B
Front panel audio
Auxiliary line in, ATAPI style (white)
Table 25
Table 26
C
Rear chassis fan
Table 27
D
ATAPI CD-ROM (black)
Table 28
E
+12 V power connector (ATX12V)
Table 29
F
Processor fan
Table 30
G
Main power
Table 31
H
Chassis intrusion
Table 32
I
Front chassis fan
Table 33
Figure 13. Audio, Power, and Hardware Control Connectors
62
Technical Reference
Figure 14 shows the location of the audio, power, and hardware control connectors on the Desktop
Board D845GERG2 with the Gigabit Ethernet LAN option.
C D
B
A
1
2
9
10
E
1
4
1
4
3
1 2
1
3
4
1
F
3
1 3
1
I H
11
1
20
10
G
OM15118
Item
Description
For more information see:
A
B
Front panel audio
Auxiliary line in, ATAPI style (white)
Table 25
Table 26
C
Rear chassis fan
Table 27
D
ATAPI CD-ROM (black)
Table 28
E
+12 V power connector (ATX12V)
Table 29
F
Processor fan
Table 30
G
Main power
Table 31
H
Chassis intrusion
Table 32
I
Front chassis fan
Table 33
Figure 14. Audio, Power, and Hardware Control Connectors on the Desktop Board
D845GERG2 with the Gigabit Ethernet LAN option
63
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 25.
#
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
Ground
8
Key
9
LEFT_OUT
10
LEFT_IN
INTEGRATOR’S 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 72 for more information.
Table 26.
Pin
Signal Name
1
Left auxiliary line in
2
Ground
3
Ground
4
Right auxiliary line in
Table 27.
Rear Chassis Fan Connector
Pin
Signal Name
1
(Note)
2
+12 V
3
REAR_TACH_OUT
Note:
Pin 1 is Control if the Desktop Board uses the hardware monitoring and fan control ASIC.
Pin 1 is Ground if the Desktop Board uses the hardware monitoring ASIC.
Table 28.
64
Auxiliary Line In Connector
ATAPI CD-ROM Connector
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-compliant power supplies with these boards. ATX12V 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 power supplies to the
corresponding connectors on the 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.
Table 29.
ATX12V Power Connector
Pin
Signal Name
Pin
Signal Name
1
Ground
2
Ground
3
+12 V
4
+12 V
Table 30.
Processor Fan Connector
Pin
Signal Name
1
(Note)
2
+12 V
3
CPU_FAN_TACH
Note:
Pin 1 is Control if the Desktop Board uses the hardware monitoring and fan control ASIC.
Pin 1 is Ground if the Desktop Board uses the hardware monitoring ASIC.
65
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 31.
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 32.
Chassis Intrusion Connector
Pin
Signal Name
1
Intruder
2
Ground
Table 33.
Front Chassis Fan Connector
Pin
Signal Name
1
(Note 1)
2
+12 V
3
(Note 2)
Notes:
1.
2.
66
Main Power Connector
Pin 1 is Control if the Desktop Board uses the hardware monitoring and fan control ASIC.
Pin 1 is Ground if the Desktop Board uses the hardware monitoring ASIC.
Pin 3 is FRONT_TACH_OUT if the Desktop Board uses the hardware monitoring and fan control ASIC.
Pin 3 is No connect if the Desktop Board uses the hardware monitoring ASIC.
Technical Reference
2.8.2.3
Add-in Board and Peripheral Interface Connectors
Figure 15 shows the location of the add-in board connector and peripheral connectors for the
Desktop Board D845GEBV2. Note the following considerations for the PCI bus connectors (for
both Desktop Boards):
•
•
All of the PCI bus connectors are bus master capable.
SMBus signals are routed to PCI bus connector 2. This enables PCI bus add-in boards with
SMBus support to access sensor data on the Desktop Board. The specific SMBus signals are
as follows:
 The SMBus clock line is connected to pin A40.
 The SMBus data line is connected to pin A41.
A
B
C
D
E
G
F
H
2
1
2
1
1
L
K
40
39
40 2
39 1
J
34
33
I
OM13579
Item
Description
Item
Description
A
B
C
D
E
F
CNR (optional)
PCI bus connector 6
PCI bus connector 5
PCI bus connector 4
PCI bus connector 3
PCI bus connector 2
G
H
I
J
K
L
PCI bus connector 1
AGP connector
Diskette drive
Primary IDE
Secondary IDE
SCSI LED
Figure 15. D845GEBV2 Add-in Board and Peripheral Interface Connectors
Figure 16 shows the location of the add-in board connector and peripheral connectors for the
Desktop Board D845GERG2.
67
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
A
B
C
D
E
2
1
2
1
I
H
40
39
40 2
39 1
G
34
33
F
OM15022
Item
Description
Item
Description
A
B
C
D
E
CNR (optional)
PCI bus connector 3
PCI bus connector 2
PCI bus connector 1
AGP connector
F
G
H
I
Diskette drive
Primary IDE
Secondary IDE
SCSI LED
Figure 16. D845GERG2 Add-in Board and Peripheral Interface Connectors
#
INTEGRATOR’S NOTES
•
The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy
3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V
AGP cards.
•
Not all PCI video cards can be used in PCI bus connectors 1 and 2 (the PCI bus
connectors closest to the processor). To avoid clearance problems, install PCI video
cards in PCI bus connector 3.
Table 34.
68
SCSI LED Connector
Pin
Signal Name
1
SCSI_ACT#
2
No connect
Technical Reference
2.8.3
External I/O Connectors
Figure 17 shows the locations of the external I/O connectors.
2
1
C
7
10
1
2
B
8
9
A
3
1
OM13580
Item
Description
For more information see:
A
B
C
Auxiliary front panel power/sleep/message-waiting LED
Front panel
Front panel USB
Table 39
Table 36
Table 35
Figure 17. External I/O Connectors
Table 35.
#
Front Panel USB Connector
Pin
Signal Name
Pin
Signal Name
1
USB_FNT_PWR
2
USB_FNT_PWR
3
USB_FNTA#
4
USB_FNTB#
5
USB_FNTA
6
USB_FNTB
7
Ground
8
Ground
9
Key
10
USB_FP_OC (USB front panel
overcurrent signal)
INTEGRATOR’S NOTE
Use only a front panel USB connector that conforms to the USB 2.0 specification for high-speed
USB devices.
69
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.8.3.1
Front Panel Connector
This section describes the functions of the front panel connector. Table 36 lists the signal names
of the front panel connector.
Table 36.
Front Panel Connector
Pin
Signal
In/Out
Description
Pin
Signal
In/Out
1
HD_PWR
Out
Hard disk LED pull-up 2
(330 Ω) to +5 V
HDR_BLNK_
GRN
Out
Front panel green
LED
3
HAD#
Out
Hard disk active LED
HDR_BLNK_
YEL
Out
Front panel yellow
LED
Hard Drive Activity LED
Description
Power LED
4
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
N/C
Not connected
1
Hard Drive
Activity LED
Reset
Switch
+5 V DC
2
3
4
5
6
7
8
9
Power
LED
Power
Switch
N/C
OM14561
2.8.3.1.1
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. The LED will also show activity for devices connected to the SCSI
hard drive activity LED connector.
For information about
Refer to
The SCSI hard drive activity LED connector
Section 1.8.3.2, page 34
2.8.3.1.2
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.
70
Technical Reference
2.8.3.1.3
Power/Sleep/Message Waiting LED Connector
Pins 2 and 4 can be connected to a one- or two-color LED. Table 37 shows the possible states for
a one-color LED. Table 38 shows the possible states for a two-color LED.
Table 37.
States for a One-Color Power LED
LED State
Description
Off
Power off/sleeping
Steady Green
Running
Blinking Green
Running/message waiting
Table 38.
#
States for a Two-Color Power LED
LED State
Description
Off
Power off
Steady Green
Running
Blinking Green
Running/message waiting
Steady Yellow
Sleeping
Blinking Yellow
Sleeping/message waiting
INTEGRATOR’S NOTE
To use the message waiting function, ACPI must be enabled in the operating system and a
message-capturing application must be invoked.
2.8.3.1.4
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 board.) At least two seconds
must pass before the power supply will recognize another on/off signal.
2.8.3.2
Auxiliary Front Panel Power/Sleep/Message-Waiting LED Connector
Pins 1 and 3 of this connector duplicate the signals on pins 2 and 4 of the front panel connector.
Table 39 lists the signal names of the Auxiliary Front Panel Power/Sleep/Message-Waiting LED
Connector.
Table 39.
Auxiliary Front Panel Power/Sleep/Message-Waiting 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
71
Intel Desktop Board D845GEBV2/D845GERG2 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 18 shows the location of the jumper blocks.
A
1
2
9
10
J8A1
B
3
1
J9H2
OM13581
Item
Description
Reference Designator
A
B
Front panel audio connector/jumper block
BIOS Setup configuration jumper block
J8A1
J9H2
Figure 18. Location of the Jumper Blocks
2.9.1
Front Panel Audio Connector/Jumper Block
This connector has two functions:
•
•
72
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.
Technical Reference
Table 40 describes the two configurations of this connector/jumper block.
CAUTION
Do not place jumpers on this block in any configuration other than the one described in Table 40.
Other jumper configurations are not supported and could damage the Desktop Board.
Table 40.
Front Panel Audio Connector/Jumper Block
Jumper Setting
1
2
3
4
5
6
1 and 2
3 and 4
5 and 6
10
9 and 10
Configuration
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 12
on page 60.
7
9
1
2
3
4
5
6
Audio line out and mic in signals are available for front panel audio
connectors. Table 25 on page 64 lists the names of the signals available
on this connector when no jumpers are installed.
No jumpers
installed
7
10
9
#
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 41 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 41.
BIOS Setup Configuration Jumper Settings
Function/Mode
Jumper Setting
Configuration
Normal
1-2
3
1
The BIOS uses current configuration information and
passwords for booting.
2-3
3
1
After the POST runs, Setup runs automatically. The
maintenance menu is displayed.
None
3
1
The BIOS attempts to recover the BIOS configuration. A
recovery diskette is required.
Configure
Recovery
73
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.10 Mechanical Considerations
2.10.1
D845GEBV2 Form Factor
The Desktop Board D845GEBV2 is designed to fit into an ATX-form-factor chassis. Figure 19
illustrates the mechanical form factor for the Desktop Board D845GEBV2. Dimensions are given
in inches [millimeters]. The outer dimensions are 12.00 inches by 8.20 inches [304.80 millimeters
by 208.28 millimeters]. Location of the I/O connectors and mounting holes are in compliance with
the ATX specification (see Section 1.5).
.800
[20.32]
6.50
[165.10]
6.10
[154.94]
5.20
[132.08]
0.00
1.700
[42.5]
2.95
[74.93]
2.300
[58.42]
0.00
2.600
[66.04]
9.050
[229.87]
8.800
[223.52]
OM13583
Figure 19. Desktop Board D845GEBV2 Dimensions
74
Technical Reference
2.10.2
D845GERG2 Form Factor
The Desktop Board D845GERG2 is designed to fit into either a microATX or an ATX-form-factor
chassis. Figure 20 illustrates the mechanical form factor for the Desktop Board D845GERG2.
Dimensions are given in inches [millimeters]. The outer dimensions are 9.60 inches by
8.20 inches [243.84 millimeters by 208.28 millimeters]. Location of the I/O connectors and
mounting holes are in compliance with the ATX specification (see Section 1.5).
✏
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, and 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]
9.050
[229.87]
.550
[13.97]
0.00
2.600
[66.04]
8.800
[223.52]
OM15023
Figure 20. Desktop Board D845GERG2 Dimensions
75
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.10.3
I/O Shield
The back panel I/O shield for the Desktop Boards D845GEBV2 and D845GERG2 must meet
specific dimension and material requirements. Systems based on these Desktop Boards need the
back panel I/O shield to pass certification testing. Figure 21 shows the I/O shield for Desktop
Boards with the onboard LAN subsystem. Figure 22 shows the I/O shield for Desktop Boards
without the onboard LAN subsystem. Dimensions are given in inches to a tolerance of ±0.02
inches.
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.
✏
NOTE
The I/O shield drawings in this document are for reference only. An I/O shield compliant with the
ATX chassis specification 2.03 is available from Intel.
6.390 REF
[162.300]
0.787
0.010 TYP [20
0.063 0.005
[1.600 0.120]
0.254]
3x Dia 0.039 [1.000]
3x Dia 0.330 [8.380]
8X R0.5 MIN
0.884
[22.450]
A
0.519
[13.190]
0.276
[7.012]
0.000
[0.000]
0.027
[0.690]
0.465
[11.810]
0.472
[12.000]
5.771
[146.577]
4.840
[122.950]
3.219
[81.768]
2.081
[52.854]
1.807
[45.892]
1.195
[30.360]
0.447
[11.345]
0.000
[0.000]
0.465
[11.811]
0.567
[14.400]
Pictorial
View
OM11487
Figure 21. I/O Shield Dimensions (for Desktop Boards with the LAN Subsystem)
76
Technical Reference
6.390 REF
[162.300]
0.787
0.010 TYP [20
0.063 0.005
[1.600 0.120]
0.254]
3x Dia 0.039 [1.000]
3x Dia 0.330 [8.380]
8X R0.5 MIN
0.884
[22.450]
A
0.519
[13.190]
0.276
[7.012]
0.000
[0.000]
0.027
[0.690]
0.465
[11.810]
0.472
[12.000]
5.771
[146.577]
4.840
[122.950]
3.219
[81.768]
2.081
[52.854]
1.807
[45.892]
1.195
[30.360]
0.447
[11.345]
0.000
[0.000]
0.465
[11.811]
0.567
[14.400]
Pictorial
View
OM15024
Figure 22. I/O Shield Dimensions (for Desktop Boards with no LAN Subsystem)
77
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.11 Electrical Considerations
2.11.1
Power Consumption
Table 42 lists voltage and current measurements for a computer that contains the Desktop Board
D845GEBV2/D845GERG2 and the following:
•
•
•
•
•
•
2.80 GHz Intel Pentium 4 processor with a 512 KB cache
64 MB AGP add-in card
256 MB DDR 333 SDRAM
3.5-inch diskette drive
10 GB IDE hard disk drive
6.2 X IDE CD-ROM/32 X CD-ROM drive
This information is provided only as a guide for calculating approximate power usage with
additional resources added.
Values for the Windows XP desktop mode are measured at 640 x 480 x 256 colors and 60 Hz
refresh rate. AC watts are measured with the computer is connected to a typical 300 W power
supply, at nominal input voltage and frequency, with a true RMS wattmeter at the line input.
✏
NOTE
Actual system power consumption depends upon system configuration. The power supply should
comply with the recommendations found in the ATX/ATX12V Power Supply Design Guide,
Version 1.1 (see Section 1.5 on page 20 for specification information).
Table 42.
Power Usage
DC Current at:
Mode
AC Power
+3.3 V
+5 V
+12 V
-12 V
+5 VSB
ACPI S0
163.0 W
5.68 A
1.52 A
7.24 A
67 mA
396 mA
ACPI S1
93.0 W
4.04 A
0.51 A
2.75 A
38 mA
152 mA
ACPI S3
3.6 W
0A
0 mA
0A
0 mA
370 mA
ACPI S5
3.1 W
0A
0 mA
0A
0 mA
290 mA
2.11.2
Add-in Board Considerations
The Desktop Boards D845GEBV2 and D845GERG2 are designed to provide 2 A (average) of
+5 V current for each add-in board. The total +5 V current draw for add-in boards is as follows:
•
•
78
For a fully loaded Desktop Board D845GEBV2 (all seven expansion slots filled), the total
+5 V current draw must not exceed 14 A.
For a fully loaded Desktop Board D845GERG2 (all four expansion slots filled), the total +5 V
current draw must not exceed 8 A.
Technical Reference
2.11.3
Standby Current Requirements
CAUTION
If the standby current necessary to support multiple wake events from the PCI and/or USB buses
exceeds power supply capacity, the Desktop Boards D845GEBV2 and D845GERG2 may lose
register settings stored in memory, etc. Calculate the standby current requirements using the steps
described below.
Power supplies used with the Desktop Boards D845GEBV2 and D845GERG2 must be able to
provide enough standby current to support the Instantly Available PC (ACPI S3 sleep state)
configuration as outlined in Table 43 below.
Values are determined by specifications such as PCI 2.2. Actual measured values may vary.
To estimate the amount of standby current required for a particular system configuration, standby
current requirements of all installed components must be added to determine the total standby
current requirement. Refer to the descriptions in Table 43 and review the following steps.
1. Note the total Desktop Board D845GEBV2 or D845GERG2 standby current requirement.
2. Add to that the total PS/2 port standby current requirement if a wake-enabled device is
connected.
3. Add, from the PCI 2.2 slots (wake enabled) row, the total number of wake-enabled devices
installed (PCI and AGP) and multiply by the standby current requirement.
4. Add, from the PCI 2.2 slots (nonwake enabled) row, the total number of wake-enabled devices
installed (PCI and AGP) and multiply by the standby current requirement.
5. Add all additional wake-enabled devices’ and nonwake-enabled devices’ standby current
requirements as applicable.
6. Add all the required current totals from steps 1 through 5 to determine the total estimated
standby current power supply requirement.
Table 43.
Standby Current Requirements
Instantly Available PC Current
Support (Estimated for
Integrated Board Components)
Description
Total for Desktop Board
D845GEBV2/D845GERG2
Standby Current
Requirements (mA)
370
(Note)
345
PCI 2.2 slots (wake enabled)
375
PCI 2.2 slots (nonwake enabled)
20
CNR (Note)
375
Instantly Available PC Stand-by
Current Support
PS/2 ports
•
Estimated for add-on
components
•
Add to Instantly Available
PC total current
requirement
USB ports
(Note)
500
(See instructions above)
Note:
Dependent upon system configuration
79
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
✏
NOTE
IBM PS/2 Port Specification (Sept 1991) states:
• 275 mA for keyboard
• 70 mA for the mouse (nonwake-enable device)
PCI/AGP requirements are calculated by totaling the following:
• One wake-enabled device @ 375 mA, plus
• Five nonwake-enabled devices @ 20 mA each, plus
USB requirements are calculated as:
• One wake-enabled device @ 500 mA
• USB hub @ 100 mA
• Three USB nonwake-enabled devices connected @ 2.5 mA each
✏
NOTE
Both USB ports are capable of providing up to 500 mA during normal G0/S0 operation. Only one
USB port will support up to 500 mA of stand-by-current (wake-enabled device) during G1/S3
suspended operation. The other port may provide up to 7.5 mA (three nonwake-enabled devices.)
during G1/S3 suspended operation.
2.11.4
Fan Connector Current Capability
Table 44 lists the current capability of the fan connectors on the Desktop Boards D845GEBV2 and
D845GERG2.
Table 44.
Fan Connector Current Capability
Maximum Available Current for Desktop Boards with the:
80
Fan Connector
Hardware Monitoring ASIC
Hardware Monitoring and
Fan Control ASIC
Processor fan
1.00 A
0.80 A
Front chassis fan
0.50 A
0.30 A
Rear chassis fan
0.35 A
0.30 A
Technical Reference
2.11.5
Power Supply Considerations
CAUTION
The +5 V standby line for the power supply must be capable of providing adequate +5 V standby
current. Failure to do so can damage the power supply. The total amount of standby current
required depends on the wake devices supported and manufacturing options. Refer to
Section 2.11.3 on page 78 for additional information.
System integrators should refer to the power usage values listed in Table 42 when selecting a
power supply for use with the Desktop Board D845GEBV2 or D845GERG2.
Measurements account only for current sourced by the Desktop Board D845GEBV2 or
D845GERG2 while running in idle modes of the started operating systems.
Additional power required will depend on configurations chosen by the integrator.
The power supply must comply with the following recommendations found in the indicated
sections of the ATX form factor specification.
• The potential relation between 3.3 VDC and +5 VDC power rails (Section 4.2)
• The current capability of the +5 VSB line (Section 4.2.1.2)
• All timing parameters (Section 4.2.1.3)
• All voltage tolerances (Section 4.2.2)
For information about
The ATX form factor specification
Refer to
Section 1.5, page 20
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.
81
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
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.
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
o
(item A in Figure 23) can reach a temperature of up to 85 C in an open chassis.
Figure 23 shows the locations of the localized high temperature zones.
A
B
C
D
OM13584
A
B
C
D
Processor voltage regulator area
Processor
Intel 82845GE GMCH
Intel 82801DB ICH4
Figure 23. Localized High Temperature Zones
82
Technical Reference
Table 45 provides maximum case temperatures for the Desktop Board D845GEBV2/D845GERG2
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 D845GEBV2/D845GERG2.
Table 45.
Thermal Considerations for Components
Component
Maximum Case Temperature
Intel Pentium 4 processor
For processor case temperature, see processor datasheets and
processor specification updates
Intel 82845GE GMCH
83 C (under bias)
Intel 82801DB ICH4
110 C (under bias)
o
o
For information about
Intel Pentium 4 processor datasheets and specification updates
Refer to
Section 1.3, page 19
83
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
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 MTBF calculations for the
Desktop Boards are as follows:
•
•
Desktop Board D845GEBV2 MTBF: 108748 hours
Desktop Board D845GERG2 MTBF: 111270 hours
2.14 Environmental
Table 46 lists the environmental specifications for the Desktop Boards D845GEBV2 and
D845GERG2.
Table 46.
Desktop Board D845GEBV2/D845GERG2 Environmental Specifications
Parameter
Specification
Temperature
Non-Operating
-40 °C to +70 °C
Operating
0 °C to +55 °C
Shock
Unpackaged
50 g trapezoidal waveform
Velocity change of 170 inches/second
Packaged
Half sine 2 millisecond
Product Weight (pounds)
Free Fall (inches)
Velocity Change (inches/sec)
<20
36
167
21-40
30
152
41-80
24
136
81-100
18
118
Vibration
Unpackaged
5 Hz to 20 Hz: 0.01 g² Hz sloping up to 0.02 g² Hz
20 Hz to 500 Hz: 0.02 g² Hz (flat)
Packaged
10 Hz to 40 Hz: 0.015 g² Hz (flat)
40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz
84
Technical Reference
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 47 lists the safety regulations the Desktop Boards D845GEBV2 and D845GERG2 comply
with when correctly installed in a compatible host system.
Table 47.
Safety Regulations
Regulation
Title
CSA C22.2 No. 60950/
rd
UL 60950, 3 Edition, 2000
Bi-National Standard for Safety of Information Technology Equipment
including Electrical Business Equipment. (USA and Canada)
nd
EN 60950, 2 Edition, 1992
(with Amendments 1, 2, 3, and 4)
nd
The Standard for Safety of Information Technology Equipment including
Electrical Business Equipment. (European Union)
IEC 60950, 2 Edition, 1991
(with Amendments 1, 2, 3, and 4)
The Standard for Safety of Information Technology Equipment including
Electrical Business Equipment. (International)
EMKO-TSE (74-SEC) 207/94
Summary of Nordic deviations to EN 60950. (Norway, Sweden,
Denmark, and Finland)
2.15.2
EMC Regulations
Table 48 lists the EMC regulations the Desktop Boards D845GEBV2 and D845GERG2 comply
with when correctly installed in a compatible host system.
Table 48.
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)
rd
CISPR 22, 3 Edition (Class B)
Limits and methods of measurement of Radio Disturbance
Characteristics of Information Technology Equipment. (International)
CISPR 24: 1997
Information Technology Equipment – Immunity Characteristics – Limits
and Methods of Measurements. (International)
85
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
2.15.3
Product Certification Markings (Board Level)
The Desktop Boards D845GEBV2 and D845GERG2 have the following product certification
markings:
•
•
•
•
•
•
•
UL joint US/Canada Recognized Component mark: Consists of lower case c followed by a
stylized backward UR and followed by a small US. Includes adjacent UL file number for Intel
Desktop Boards: E210882 (component side).
FCC Declaration of Conformity logo mark for Class B equipment; to include Intel name and
D845GEBV2 and D845GERG2 model designation (solder side).
CE mark: Declaring 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: consists of a stylized C overlaid
with a check (tick) mark (component side), followed by Intel supplier code number, N-232.
The C-tick mark should also be on the shipping container.
Korean EMC certification logo mark: consists of MIC lettering within a stylized elliptical
outline.
Printed wiring board manufacturer’s recognition mark: consists of a unique UL recognized
manufacturer’s logo, along with a flammability rating (94V-0) (solder side).
PB part number: Intel bare circuit board part number (solder side). Also includes SKU
number starting with AA followed by additional alphanumeric characters.
 For the Desktop Board D845GEBV2, the PB number A97500-00x.
•
86
 For the Desktop Board D845GERG2, the PB number is A97503-00x.
Battery “+ Side Up” marking: located on the component side of the Desktop Board in close
proximity to the battery holder.
3 Overview of BIOS Features
What This Chapter Contains
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
Introduction.................................................................................................................87
BIOS Flash Memory Organization ..............................................................................87
Resource Configuration ..............................................................................................88
System Management BIOS (SMBIOS) .......................................................................89
Legacy USB Support ..................................................................................................89
BIOS Updates ............................................................................................................90
Recovering BIOS Data ...............................................................................................91
Boot Options...............................................................................................................92
Fast Booting Systems with Intel® Rapid BIOS Boot ....................................................93
BIOS Security Features..............................................................................................94
3.1 Introduction
The Desktop Boards D845GEBV2 and D845GERG2 use 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 auto-configuration 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 RG84510A.86A.
When the Desktop Board’s 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.
For information about
Refer to
The Desktop Boards’ compliance level with Plug and Play
Section 1.5, page 20
3.2 BIOS Flash Memory Organization
The Firmware Hub (FWH) includes a 4 Mbit (512 KB) symmetrical flash memory device.
Internally, the device is grouped into eight 64-KB blocks that are individually erasable, lockable,
and unlockable.
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
3.3 Resource Configuration
3.3.1
PCI Autoconfiguration
The BIOS can automatically configure PCI devices. PCI devices may be onboard or add-in cards.
Autoconfiguration lets a user insert or remove PCI cards without having to configure the system.
When a user turns on the system after adding a PCI card, the BIOS automatically configures
interrupts, the I/O space, and other system resources. Any interrupts set to Available in Setup are
considered to be available for use by the add-in card. Autoconfiguration information is stored in
ESCD format.
For information about the versions of PCI and Plug and Play supported by the BIOS, see
Section 1.5.
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.
88
Overview of BIOS Features
3.4 System Management BIOS (SMBIOS)
SMBIOS is a Desktop Management Interface (DMI) compliant method for managing computers in
a managed network.
The main component of SMBIOS is the Management Information Format (MIF) database, which
contains information about the computing system and its components. Using SMBIOS, a system
administrator can obtain the system types, capabilities, operational status, and installation dates for
system components. The MIF database defines the data and provides the method for accessing this
information. The BIOS enables applications such as third-party management software to use
SMBIOS. The BIOS stores and reports the following SMBIOS information:
•
•
•
•
BIOS data, such as the BIOS revision level
Fixed-system data, such as peripherals, serial numbers, and asset tags
Resource data, such as memory size, cache size, and processor speed
Dynamic data, such as event detection and error logging
Non-Plug and Play operating systems, such as Windows NT, 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 20
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.
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
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.
✏
NOTE
Legacy USB support is for keyboards, mice, and hubs only. Other USB devices are not supported
in legacy mode.
3.6 BIOS Updates
The BIOS can be updated using either of the following utilities, which are available on the Intel
World Wide Web site:
•
•
Intel® 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.
Intel® 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.
Both utilities support the following BIOS maintenance functions:
•
•
•
•
•
•
✏
Verifying that the updated BIOS matches the target system to prevent accidentally installing
an incompatible BIOS.
Updating both the BIOS boot block and the main BIOS. This process is fault tolerant to
prevent boot block corruption.
Updating the BIOS boot block separately.
Changing the language section of the BIOS.
Updating replaceable BIOS modules, such as the video BIOS module.
Inserting a custom splash screen.
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 19
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.
90
Overview of BIOS Features
3.6.2
Custom Splash Screen
During POST, an Intel splash screen is displayed by default. This splash screen can be replaced
with a custom splash screen. A utility is available from Intel to assist with creating a custom
splash screen. The custom splash screen can be programmed into the flash memory using the
BIOS upgrade utility. Information about this capability is available on the Intel Support World
Wide Web site.
For information about
Refer to
The Intel World Wide Web site
Section 1.3, page 19
3.7 Recovering BIOS Data
Some types of failure can destroy the BIOS. For example, the data can be lost if a power outage
occurs while the BIOS is being updated in flash memory. The BIOS can be recovered from a
diskette using the BIOS recovery mode. When recovering the BIOS, be aware of the following:
•
•
•
•
Because of the small amount of code available in the non-erasable boot block area, there is no
video support. You can only monitor this procedure by listening to the speaker or looking at
the diskette drive LED.
The recovery process may take several minutes; larger BIOS flash memory devices require
more time.
Two beeps and the end of activity in the diskette drive indicate successful BIOS recovery.
A series of continuous beeps indicates a failed BIOS recovery.
To create a BIOS recovery diskette, a bootable diskette must be created and the BIOS update files
copied to it. BIOS upgrades and the Intel Flash Memory Update Utility are available from Intel
Customer Support through the Intel World Wide Web site.
✏
NOTE
Even if the computer is configured to boot from an LS-120 diskette (in the Setup program’s
Removable Devices submenu), the BIOS recovery diskette must be a standard 1.44 MB diskette not
a 120 MB diskette.
For information about
Refer to
The BIOS recovery mode jumper settings
Section 2.9.2, page 73
The Boot menu in the BIOS Setup program
Section 4.7, page 115
Contacting Intel customer support
Section 1.3, page 19
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
3.8 Boot Options
In the BIOS Setup program, the user can choose to boot from a diskette drive, hard drives,
CD-ROM, or the network. The default setting is for the diskette drive to be the first boot device,
the hard drive second, and the ATAPI CD-ROM third. The fourth device is disabled.
3.8.1
CD-ROM 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 20
3.8.2
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.
3.8.3
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:
•
•
•
3.8.4
Video adapter
Keyboard
Mouse
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 49 lists the boot device menu options.
Table 49.
92
Boot Device Menu Options
Boot Device Menu Function Keys
Description
<↑> or <↓>
Selects a default boot device
<Enter>
Exits the menu, saves changes, and boots from the selected device
<Esc>
Exits the menu without saving changes
Overview of BIOS Features
3.9 Fast Booting Systems with Intel® Rapid BIOS Boot
These factors affect system boot speed:
•
•
3.9.1
Selecting and configuring peripherals properly
Using an optimized BIOS, such as the Intel Rapid® BIOS
Peripheral Selection and Configuration
The following techniques help improve system boot speed:
•
•
•
•
3.9.2
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.
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).
For information about
Refer to
IDE Configuration Submenu in the BIOS Setup program
Section 4.4.4, page 103
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
3.10 BIOS Security Features
The BIOS includes security features that restrict access to the BIOS Setup program and who can
boot the computer. A supervisor password and a user password can be set for the BIOS Setup
program and for booting the computer, with the following restrictions:
•
•
•
•
•
The supervisor password gives unrestricted access to view and change all the Setup options in
the BIOS Setup program. This is the supervisor mode.
The user password gives restricted access to view and change Setup options in the BIOS Setup
program. This is the user mode.
If only the supervisor password is set, pressing the <Enter> key at the password prompt of the
BIOS Setup program allows the user restricted access to Setup.
If both the supervisor and user passwords are set, users can enter either the supervisor
password or the user password to access Setup. Users have access to Setup respective to
which password is entered.
Setting the user password restricts who can boot the computer. The password prompt will be
displayed before the computer is booted. If only the supervisor password is set, the computer
boots without asking for a password. If both passwords are set, the user can enter either
password to boot the computer.
Table 50 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 50.
Supervisor and User Password Functions
Supervisor
Password Set Mode
Setup Options
Password to
Enter Setup
Password
During Boot
Neither
Can change all
options (Note)
Can change all None
options (Note)
None
None
Supervisor
only
Can change all
options
Can change a
limited number
of options
Supervisor
None
User only
N/A
Can change all Enter Password
options
Clear User Password
User
User
Supervisor
and user set
Can change all
options
Can change a
limited number
of options
Supervisor or
user
Supervisor or
user
Note:
94
User Mode
Supervisor Password
Supervisor Password
Enter Password
If no password is set, any user can change all Setup options.
For information about
Refer to
Setting user and supervisor passwords
Section 4.4.10, page 112
4 BIOS Setup Program
What This Chapter Contains
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
Introduction.................................................................................................................95
Maintenance Menu .....................................................................................................96
Main Menu..................................................................................................................97
Advanced Menu..........................................................................................................98
Security Menu ..........................................................................................................113
Power Menu .............................................................................................................114
Boot Menu ................................................................................................................115
Exit Menu .................................................................................................................118
4.1 Introduction
The BIOS Setup program can be used to view and change the BIOS settings for the computer. The
BIOS Setup program is accessed by pressing the <F2> key after the Power-On Self-Test (POST)
memory test begins and before the operating system boot begins. The menu bar is shown below.
Maintenance Main
Advanced
Security
Power
Boot
Exit
Table 51 lists the BIOS Setup program menu features.
Table 51.
✏
BIOS Setup Program Menu Bar
Maintenance
Main
Advanced
Security
Power
Boot
Exit
Clears
passwords and
BIS credentials
and enables
extended
configuration
mode
Allocates
resources for
hardware
components
Configures
advanced
features
available
through the
chipset
Sets
passwords
and security
features
Configures
power
management
features
Selects boot
options and
power supply
controls
Saves or
discards
changes to
Setup
program
options
For information about
Refer to
Boot Integrity Services (BIS)
Section 1.5, page 20
NOTE
In this chapter, all examples of the BIOS Setup program menu bar include the maintenance menu;
however, the maintenance menu is displayed only when the Desktop Board is in configuration
mode. Section 2.9.2 on page 73 tells how to put the Desktop Board in configuration mode.
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 52 lists the function keys available for menu screens.
Table 52.
BIOS Setup Program Function Keys
BIOS Setup Program Function Key
Description
<←> or <→>
Selects a different menu screen (Moves the cursor left or right)
<↑> or <↓>
Selects an item (Moves the cursor up or down)
<Tab>
Selects a field (Not implemented)
<Enter>
Executes command or selects the submenu
<F9>
Load the default configuration values for the current menu
<F10>
Save the current values and exits the BIOS Setup program
<Esc>
Exits the menu
4.2 Maintenance Menu
To access this menu, select Maintenance on the menu bar at the top of the screen.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
The menu shown in Table 53 is for clearing Setup passwords and enabling extended configuration
mode. Setup only displays this menu in configuration mode. See Section 2.9.2 on page 73 for
configuration mode setting information.
Table 53.
Maintenance Menu
Feature
Options
Description
Clear All Passwords
• Ok (default)
Clears the user and supervisor passwords.
• Cancel
Clear BIS Credentials • Ok (default)
96
• Cancel
Clears the Wired for Management Boot Integrity Service (BIS)
credentials.
CPU Stepping
Signature
No options
Displays CPU’s Stepping Signature.
CPU Microcode
Update Revision
No options
Displays CPU’s Microcode Update Revision.
BIOS Setup Program
4.3 Main Menu
To access this menu, select Main on the menu bar at the top of the screen.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
Table 54 describes the Main menu. This menu reports processor and memory information and is
for configuring the system date and system time.
Table 54.
Main Menu
Feature
Options
Description
BIOS Version
No options
Displays the version of the BIOS.
Processor Type
No options
Displays processor type.
Hyper-Threading
Technology
• Disabled
• Enabled (default)
Disables/enables Hyper-Threading Technology. This
option is present only when a processor that supports
Hyper-Threading Technology is installed.
Processor Speed
No options
Displays processor speed.
System Bus Speed
No options
Displays the system bus speed.
System Memory
Speed
No options
Displays the system memory speed.
Cache RAM
No options
Displays the size of second-level cache.
Total Memory
No options
Displays the total amount of RAM.
Memory Bank 0
Memory Bank 1
No options
Displays the amount and type of RAM in the memory
banks.
Language
• English (default)
Selects the current default language used by the BIOS.
• Francais
System Time
Hour, minute, and
second
Specifies the current time.
System Date
Day of week
Month/day/year
Specifies the current date.
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Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
4.4 Advanced Menu
To access this menu, select Advanced on the menu bar at the top of the screen.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
Table 55 describes the Advanced Menu. This menu is used for setting advanced features that are
available through the chipset.
Table 55.
Advanced Menu
Feature
Options
Description
PCI Configuration
Select to display
submenu
Configures individual PCI slot’s IRQ priority.
Boot Configuration
Select to display
submenu
Configures Plug and Play and the Numlock key, and resets
configuration data.
Peripheral Configuration
Select to display
submenu
Configures peripheral ports and devices.
IDE Configuration
Select to display
submenu
Specifies type of connected IDE devices.
Diskette Configuration
Select to display
submenu
Configures the diskette drive.
Event Log Configuration
Select to display
submenu
Configures Event Logging.
Video Configuration
Select to display
submenu
Configures video features.
USB Configuration
Select to display
submenu
Configures USB support.
Chipset Configuration
Select to display
submenu
Configures advanced chipset features.
Fan Control Configuration Select to display
submenu
98
Configures fan control options.
BIOS Setup Program
4.4.1
PCI Configuration Submenu
To access this submenu, select Advanced on the menu bar and then PCI Configuration.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu shown in Table 56 is used to configure the IRQ priority of PCI slots individually.
Table 56.
PCI Configuration Submenu
Feature
Options
Description
PCI Slot1 IRQ Priority
• Auto (default)
Allows selection of IRQ priority for PCI bus connector 1.
(Note 1)
• 5
• 9
• 10
• 11
PCI Slot2 IRQ Priority
• Auto (default)
(Note 1)
• 5
Allows selection of IRQ priority for PCI bus connector 2.
• 9
• 10
• 11
PCI Slot3 IRQ Priority
• Auto (default)
(Note 1)
• 5
Allows selection of IRQ priority for PCI bus connector 3.
• 9
• 10
• 11
PCI Slot4 IRQ Priority
• Auto (default)
(Note 1, Note 2)
• 5
Allows selection of IRQ priority for PCI bus connector 4.
• 9
• 10
• 11
continued
99
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 56.
PCI Configuration Submenu (continued)
Feature
Options
Description
PCI Slot5 IRQ Priority
• Auto (default)
Allows selection of IRQ priority for PCI bus connector 5.
(Note 1, Note 2)
• 5
• 9
• 10
• 11
PCI Slot6 IRQ Priority
• Auto (default)
(Note 1, Note 2)
• 5
Allows selection of IRQ priority for PCI bus connector 6.
• 9
• 10
• 11
Notes
1.
Additional interrupts may be available if certain onboard devices (such as the serial and parallel ports) are disabled.
2.
This option appears only on the Desktop Board D845GEBV2.
4.4.2
Boot Configuration Submenu
To access this submenu, select Advanced on the menu bar and then Boot Configuration.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu represented by Table 57 is for setting Plug and Play options, resetting configuration
data, and the power-on state of the Numlock key.
Table 57.
Boot Configuration Submenu
Feature
Options
Description
Plug & Play O/S
• No (default)
Specifies if manual configuration is desired.
No lets the BIOS configure all devices. This setting is
appropriate when using a Plug and Play operating system.
Yes lets the operating system configure Plug and Play
devices not required to boot the system. This option is
available for use during lab testing.
• Yes
Numlock
• Off
• On (default)
100
Specifies the power-on state of the Numlock feature on the
numeric keypad of the keyboard.
BIOS Setup Program
4.4.3
Peripheral Configuration Submenu
To access this submenu, select Advanced on the menu bar and then Peripheral Configuration.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu represented in Table 58 is used for configuring computer peripherals.
Table 58.
Peripheral Configuration Submenu
Feature
Options
Description
Serial Port A
• Disabled
Configures serial port A.
• Enabled
Auto assigns the first free COM port, normally COM1, the
• Auto (default) address 3F8h, and the interrupt IRQ4.
An * (asterisk) displayed next to an address indicates a
conflict with another device.
Base I/O address
(This feature is present
only when Serial Port A
is set to Enabled)
• 3F8 (default)
Interrupt
(This feature is present
only when Serial Port A
is set to Enabled)
• IRQ 3
Parallel port
• Disabled
Configures the parallel port.
• Enabled
Auto assigns LPT1 the address 378h and the interrupt IRQ7.
• 2F8
Specifies the base I/O address for serial port A, if serial port A
is set to Enabled.
• 3E8
• 2E8
• IRQ 4
(default)
Specifies the interrupt for serial port A, if serial port A is set to
Enabled.
• Auto (default) An * (asterisk) displayed next to an address indicates a
conflict with another device.
Mode
• Output Only
• Bi-directional
(default)
Selects the mode for the parallel port. Not available if the
parallel port is disabled.
Output Only operates in AT†-compatible mode.
• EPP
Bi-directional operates in PS/2-compatible mode.
• ECP
EPP is Extended Parallel Port mode, a high-speed
bi-directional mode.
ECP is Enhanced Capabilities Port mode, a high-speed bidirectional mode.
continued
101
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 58.
Peripheral Configuration Submenu (continued)
Feature
Options
Description
Base I/O address
(This feature is present
only when Parallel Port
is set to Enabled)
• 378 (default)
Specifies the base I/O address for the parallel port.
Interrupt
(This feature is present
only when Parallel Port
is set to Enabled)
• IRQ 5
DMA
(This feature is present
only when Parallel Port
Mode is set to ECP)
• 1
Audio
• Enabled
(default)
• 278
• IRQ 7
(default)
• Disabled
• Enabled
(default)
102
Specifies the DMA channel.
• 3 (default)
• Disabled
LAN Device
Specifies the interrupt for the parallel port.
Enables or disables the onboard audio subsystem.
For boards with no onboard audio subsystem, this option
does not appear.
Enables or disables the onboard LAN device.
For boards with no onboard LAN subsystem, this option will
not appear.
BIOS Setup Program
4.4.4
IDE Configuration Submenu
To access this submenu, select Advanced on the menu bar and then IDE Configuration.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The menu represented in Table 59 is used to configure IDE device options.
Table 59.
IDE Configuration Submenu
Feature
Options
Description
IDE Controller
• Disabled
Specifies the integrated IDE controller.
Primary enables only the primary IDE controller.
Secondary enables only the secondary IDE controller.
Both enables both IDE controllers.
• Primary
• Secondary
• Both (default)
PCI IDE Bus Master
Hard Disk Pre-Delay
• Disabled
• Enabled (default)
Enables/disables the use of DMA for hard drive BIOS
INT13 reads and writes.
• Disabled (default)
Specifies the hard disk drive pre-delay.
• 3 Seconds
• 6 Seconds
• 9 Seconds
• 12 Seconds
• 15 Seconds
• 21 Seconds
• 30 Seconds
Primary IDE Master
Select to display
sub-menu
Reports type of connected IDE device.
Primary IDE Slave
Select to display
sub-menu
Reports type of connected IDE device.
Secondary IDE Master
Select to display
sub-menu
Reports type of connected IDE device.
Secondary IDE Slave
Select to display
sub-menu
Reports type of connected IDE device.
103
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
4.4.4.1
Primary/Secondary IDE Master/Slave Submenus
To access these submenus, select Advanced on the menu bar, then IDE Configuration, and then the
master or slave to be configured.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Primary IDE Master
Primary IDE Slave
Secondary IDE Master
Secondary IDE Slave
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
There are four IDE submenus: primary master, primary slave, secondary master, and secondary
slave. Table 60 shows the format of the IDE submenus. For brevity, only one example is shown.
Table 60.
Primary/Secondary IDE Master/Slave Submenus
Feature
Options
Description
Drive Installed
No options
Displays the type of drive installed.
Type
• Auto (default)
Specifies the IDE configuration mode for IDE devices.
• User
User allows capabilities to be changed.
Auto fills-in capabilities from ATA/ATAPI device.
Maximum Capacity
No options
Displays the capacity of the drive.
LBA/Large Mode
• Disabled
Selects the translation mode for the IDE hard disk.
• Auto (default)
(This item is read-only unless Type is set to User.)
• Disabled
Disabled = Data transfers to/from the device occur one
sector at a time.
Block Mode
• Auto (default)
Auto = Data transfers to/from the device occur multiple
sectors at a time if the device supports block mode
transfers.
(This item is read-only unless Type is set to User.)
PIO Mode
• Auto (default)
Specifies the PIO mode.
• 0
(This item is read-only unless Type is set to User.)
• 1
• 2
• 3
• 4
continued
104
BIOS Setup Program
Table 60.
Primary/Secondary IDE Master/Slave Submenus (continued)
Feature
Options
Description
DMA Mode
• Auto (default)
Specifies the DMA mode for the drive.
• SWDMA0
Auto = Auto-detected
• SWDMA1
SWDMAn = Single Word DMAn
• SWDMA2
SWDMAn = Multi Word DMAn
• MWDMA0
UDMAn = Ultra DMAn
• MWDMA1
• MWDMA2
(This item is read-only unless Type is set to User.)
• UDMA0
• UDMA1
• UDMA2
• UDMA3
• UDMA4
• UDMA5
S.M.A.R.T.
Cable Detected
• Auto (default)
• Disabled
Enables/disables S.M.A.R.T. (Self-Monitoring, Analysis,
and Reporting Technology).
• Enabled
(This item is read-only unless Type is set to User.)
No options
Displays the type of cable connected to the IDE
interface: 40-conductor or 80-conductor (for ATA-100
peripherals).
105
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
4.4.5
Diskette Configuration Submenu
To access this menu, select Advanced on the menu bar and then Diskette Configuration.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu represented by Table 61 is used for configuring the diskette drive.
Table 61.
Diskette Configuration Submenu
Feature
Options
Description
Diskette Controller
• Disabled
Disables or enables the integrated diskette
controller.
• Enabled (default)
Floppy A
• Not Installed
• 360 KB
Diskette Write Protect
• 1.2 MB
5¼"
• 720 KB
3½"
• 1.44 MB
3½" (default)
• 2.88 MB
3½"
• Disabled (default)
• Enabled
106
5¼"
Specifies the capacity and physical size of
diskette drive A.
Disables or enables write protection for the
diskette drive.
BIOS Setup Program
4.4.6
Event Log Configuration Submenu
To access this menu, select Advanced on the menu bar and then Event Log Configuration.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu represented by Table 62 is used to configure the event logging features.
Table 62.
Event Log Configuration Submenu
Feature
Options
Description
Event Log
No options
Indicates if there is space available in the event log.
View Event Log
[Enter]
Displays the event log.
Clear All Event Logs
• Ok (default)
Clears the event log after rebooting.
• Cancel
Mark Events As Read
• Ok (default)
Marks all events as read.
• Cancel
107
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
4.4.7
Video Configuration Submenu
To access this menu, select Advanced on the menu bar and then Video Configuration.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu represented in Table 63 is for configuring the video features.
Table 63.
Video Configuration Submenu
Feature
Options
Description
Graphics Aperture Size
• 4 MB
Sets the aperture size for the video controller.
• 8 MB
• 16 MB
• 32 MB
• 64 MB (default)
• 128 MB
• 256 MB
Primary Video Adapter
• AGP (default)
• PCI
Frame Buffer Size
• 512 KB (default)
• 1 MB
• 8 MB
108
Selects primary video adapter to be used during
boot.
Control how much system RAM is reserved for use
by the internal graphics device. A larger frame buffer
should provide higher performance.
BIOS Setup Program
4.4.8
USB Configuration Submenu
To access this menu, select Advanced on the menu bar and then USB Configuration.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu represented in Table 64 is for configuring the USB features.
Table 64.
USB Configuration Submenu
Feature
Options
Description
High-speed USB
• Disabled
• Enabled (default)
Set to Disabled when a USB 2.0 driver is not
available.
• Disabled
Enables/disables legacy USB support.
Legacy USB Support
• Enabled (default)
109
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
4.4.9
Chipset Configuration Submenu
To access this menu, select Advanced on the menu bar and then Chipset Configuration.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu represented in Table 65 is for configuring the chipset options.
Table 65.
Chipset Configuration Submenu
Feature
Options
Description
ISA Enable Bit
• Enabled (default)
When set to Enable, a PCI-to-PCI bridge will only
recognize I/O addresses that do not alias to an ISA
range (within the bridge’s assigned I/O range).
• Disabled
PCI Latency Timer
• 32 (default)
• 64
• 96
Allows you to control the time (in PCI bus clock
cycles) that an agent on the PC bus can hold the bus
when another agent has requested the bus.
• 128
• 160
• 192
• 224
• 248
Extended Configuration
• Default (default)
Allows the setting of extended configuration options.
• User Defined
SDRAM Frequency
• Auto (default)
• 266 MHz
• 333 MHz
SDRAM Timing Control
• Auto (default)
• Manual – Aggressive
• Manual – User Defined
Allows override of detected memory frequency value.
NOTE: If SDRAM Frequency is changed, you must
reboot for the change to take effect. After changing
this setting and rebooting, the System Memory
Speed parameter in the Main menu will reflect the
new value.
Auto = Timings will be programmed according to the
memory detected.
Manual – Aggressive = Selects most aggressive
user-defined timings.
Manual – User Defined = Allows manual override of
detected SDRAM settings.
continued
110
BIOS Setup Program
Table 65.
Primary/Secondary IDE Master/Slave Submenus (continued)
Feature
Options
Description
SDRAM RAS# Active to
Precharge
• 8
Corresponds to tRAS.
• 7
• 6 (default)
• 5
SDRAM CAS# Latency
• 2.0 (default)
• 2.5
SDRAM RAS# to CAS#
Delay
• 4
• 3 (default)
Selects the number of clock cycles required to
address a column in memory.
Selects the number of clock cycles between
addressing a row and addressing a column.
• 2
SDRAM RAS#
Precharge
• 4
• 3 (default)
Selects the length of time required before accessing
a new row.
• 2
111
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
4.4.10
Fan Control Configuration Submenu
To access this menu, select Advanced on the menu bar and then Fan Control Configuration.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
USB Configuration
Chipset Configuration
Fan Control Configuration
The submenu represented in Table 66 is for configuring the fan control options.
Table 66.
Fan Control Configuration Submenu
Feature
Options
Description
Fan Control
• Disabled
Disables/enables fan control.
• Enabled (default)
Lowest Fan Speed
• Slow (default)
• Off
Defines the lower limit of chassis fan speed
operation.
Slow = At low system temperatures, the fans will
continue to run at a slow speed.
Off = At low system temperatures, the fans will turn
off.
✏
NOTE
These options will not take effect until power has been completely removed from the system. After
saving the BIOS settings and turning the system off, unplug the power cord and wait at least 30
seconds before re-applying power and turning the system back on.
112
BIOS Setup Program
4.5 Security Menu
To access this menu, select Security from the menu bar at the top of the screen.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
The menu represented by Table 67 is for setting passwords and security features.
Table 67.
Security Menu
If no password entered previously:
Feature
Options
Description
Supervisor Password
No options
Reports if there is a supervisor password set.
User Password
No options
Reports if there is a user password set.
Set Supervisor Password
Password can be up to seven
alphanumeric characters.
Specifies the supervisor password.
User Access Level
• No Access
(Note 1)
• View Only
Sets BIOS Setup Utility access rights for user
level.
• Limited
• Full (default)
Set User Password
Password can be up to seven
alphanumeric characters.
Specifies the user password.
Clear User Password
• Ok (default)
Clears the user password.
(Note 2)
• Cancel
Chassis Intrusion
• Disabled (default)
Disabled = Disables Chassis Intrusion
• Log,
Log = Logs the intrusion in the event log
• Log, notify once
Log, notify once = Halts system during POST.
User must press <F4> to continue. Intrusion
flag is cleared and the event log is updated.
• Log, notify til cleared
Log, notify til cleared = Halts system during
POST. User must enter BIOS setup Security
Menu and select “Clear Chassis Intrusion
Status” to clear the Chassis intrusion flag.
Notes:
1.
This feature appears only if a supervisor password has been set.
2.
This feature appears only if a user password has been set.
3.
This feature appears only if the Chassis Intrusion log, notify til cleared option has been set.
113
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
4.6 Power Menu
To access this menu, select Power from the menu bar at the top of the screen.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
ACPI
The menu represented in Table 68 is for setting the power management features.
Table 68.
Power Menu
Feature
Options
Description
ACPI
Select to display submenu
Sets the ACPI power management options.
After Power Failure
• Stay Off
Specifies the mode of operation if an AC power loss
occurs.
• Last State (default)
• Power On
Stay Off keeps the power off until the power button is
pressed.
Last State restores the previous power state before
power loss occurred.
Power On restores power to the computer.
Wake on PCI PME
• Stay Off (default)
• Power On
4.6.1
Specifies how the computer responds to a PCI power
management event.
ACPI Submenu
To access this menu, select Power from the menu bar at the top of the screen and then ACPI.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
ACPI
The submenu represented in Table 69 is for setting the ACPI power options.
Table 69.
ACPI Submenu
Feature
Options
Description
ACPI Suspend State
• S1 State
S1 is the safest mode but consumes more power.
S3 consumes less power, but some drivers may not
support this state.
• S3 State
Wake on LAN from S5
• Stay Off (default)
• Power On
114
In ACPI soft-off mode only, determines how the
system responds to a LAN wake-up event.
BIOS Setup Program
4.7 Boot Menu
To access this menu, select Boot from the menu bar at the top of the screen.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
Boot Device Priority
Hard Disk Drives
Removable Devices
ATAPI CD-ROM Drives
The menu represented in Table 70 is used to set the boot features and the boot sequence.
Table 70.
Boot Menu
Feature
Options
Description
Silent Boot
• Disabled
Disabled displays normal POST messages.
• Enabled (default)
Enabled displays OEM graphic instead of POST
messages.
• Disabled
Enables the computer to boot without running
certain POST tests.
Intel(R) Rapid BIOS Boot
• Enabled (default)
Scan User Flash Area
PXE Boot to LAN
USB Boot
• Disabled
• Enabled (default)
Enables the BIOS to scan the flash memory for
user binary files that are executed at boot time.
• Disabled (default)
Disables/enables PXE boot to LAN.
• Enabled
Note: When set to Enabled, you must reboot for
the Intel Boot Agent device to be available in the
Boot Device menu.
• Disabled
Disables/enables booting to USB boot devices.
• Enabled (default)
Boot Device Priority
Select to display submenu
Specifies the boot sequence from the available
types of boot devices.
Hard Disk Drives
Select to display submenu
Specifies the boot sequence from the available
hard disk drives.
Removable Devices
Select to display submenu
Specifies the boot sequence from the available
removable devices.
ATAPI CD-ROM Drives
Select to display submenu
Specifies the boot sequence from the available
ATAPI CD-ROM drives.
115
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
4.7.1
Boot Device Priority Submenu
To access this menu, select Boot on the menu bar and then Boot Devices Priority.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
Boot Device Priority
Hard Disk Drives
Removable Devices
ATAPI CD-ROM Drives
The submenu represented in Table 71 is for setting boot devices priority.
Table 71.
Boot Device Priority Submenu
Feature
Options
Description
st
• Removable Dev.
nd
• Hard Drive
rd
• ATAPI CD-ROM
th
• Intel® Boot Agent
Specifies the boot sequence according to the device type.
The computer will attempt to boot from up to five devices
as specified here. Only one of the devices can be an IDE
hard disk drive. To specify boot sequence:
1 Boot Device
2 Boot Device
3 Boot Device
4 Boot Device
(Note)
• Disabled
1.
Select the boot device with <↑> or <↓>.
2.
Press <Enter> to set the selection as the intended
boot device.
The default settings for the first through fourth boot
devices are, respectively:
• Removable Dev.
• Hard Drive
• ATAPI CD-ROM
• Intel Boot Agent
Note:
116
The boot device identifier for Intel Boot Agent (IBA) may vary depending on the BIOS release.
BIOS Setup Program
4.7.2
Hard Disk Drives Submenu
To access this menu, select Boot on the menu bar and then Hard Disk Drives.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
Boot Device Priority
Hard Disk Drives
Removable Devices
ATAPI CD-ROM Drives
The submenu represented in Table 72 is for setting hard disk drive priority.
Table 72.
Hard Disk Drives Submenu
Feature
st
1 Hard Disk Drive
(Note)
Note:
4.7.3
Options
Description
Dependent on installed
hard drives
Specifies the boot sequence from the available hard
disk drives. To specify boot sequence:
1.
Select the boot device with <↑> or <↓>.
2.
Press <Enter> to set the selection as the
intended boot device.
This boot device submenu appears only if at least one boot device of this type is installed. This list will display up
to twelve hard disk drives, the maximum number of hard disk drives supported by the BIOS.
Removable Devices Submenu
To access this menu, select Boot on the menu bar, then Removable Devices.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
Boot Device Priority
Hard Disk Drives
Removable Devices
ATAPI CD-ROM Drives
The submenu represented in Table 73 is for setting removable device priority.
Table 73.
Removable Devices Submenu
Feature
st
1 Removable Device
(Note)
Note:
Options
Description
Dependent on installed
removable devices
Specifies the boot sequence from the available
removable devices. To specify boot sequence:
1.
Select the boot device with <↑> or <↓>.
2.
Press <Enter> to set the selection as the
intended boot device.
This boot device submenu appears only if at least one boot device of this type is installed. This list will display up
to four removable devices, the maximum number of removable devices supported by the BIOS.
117
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
4.7.4
ATAPI CD-ROM Drives Submenu
To access this menu, select Boot on the menu bar and then ATAPI CD-ROM Drives.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
Boot Device Priority
Hard Disk Drives
Removable Devices
ATAPI CD-ROM Drives
The submenu represented in Table 74 is for setting ATAPI CD-ROM drive priority.
Table 74.
ATAPI CD-ROM Drives Submenu
Feature
Options
Description
Dependent on installed
ATAPI CD-ROM drives
Specifies the boot sequence from the available
ATAPI CD-ROM drives. To specify boot sequence:
st
1 ATAPI CDROM
(Note)
Note:
1.
Select the boot device with <↑> or <↓>.
2.
Press <Enter> to set the selection as the
intended boot device.
This boot device submenu appears only if at least one boot device of this type is installed. This list will display up
to four ATAPI CD-ROM drives, the maximum number of ATAPI CD-ROM drives supported by the BIOS.
4.8 Exit Menu
To access this menu, select Exit from the menu bar at the top of the screen.
Maintenance
Main
Advanced
Security
Power
Boot
Exit
The menu represented in Table 75 is for exiting the BIOS Setup program, saving changes, and
loading and saving defaults.
Table 75.
118
Exit Menu
Feature
Description
Exit Saving Changes
Exits and saves the changes in CMOS SRAM.
Exit Discarding Changes
Exits without saving any changes made in the BIOS Setup program.
Load Optimal Defaults
Loads the optimal default values for all the Setup options.
Load Custom Defaults
Loads the custom defaults for Setup options.
Save Custom Defaults
Saves the current values as custom defaults. Normally, the BIOS reads the
Setup values from flash memory. If this memory is corrupted, the BIOS reads the
custom defaults. If no custom defaults are set, the BIOS reads the factory
defaults.
Discard Changes
Discards changes without exiting Setup. The option values present when the
computer was turned on are used.
5 Error Messages and Beep Codes
What This Chapter Contains
5.1
5.2
5.3
5.4
5.5
BIOS Error Messages...............................................................................................119
Port 80h POST Codes..............................................................................................121
Bus Initialization Checkpoints ...................................................................................125
Speaker ....................................................................................................................126
BIOS Beep Codes ....................................................................................................126
5.1 BIOS Error Messages
Table 76 lists the error messages and provides a brief description of each.
Table 76.
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
Could not read sector from corresponding drive.
Pri Master Drive - ATAPI Incompatible
Pri Slave Drive - ATAPI Incompatible
Sec Master Drive - ATAPI Incompatible
Sec Slave Drive - ATAPI Incompatible
Corresponding drive in not an ATAPI device. Run Setup to make
sure device is selected correctly.
A: Drive Error
No response from diskette drive.
Cache Memory Bad
An error occurred when testing L2 cache. Cache memory may be
bad.
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.
Check Setup to make sure type is correct.
CMOS Checksum Bad
The CMOS checksum is incorrect. CMOS memory may have
been corrupted. Run Setup to reset values.
CMOS Settings Wrong
CMOS values are not the same as the last boot. These values
have either been corrupted or the battery has failed.
CMOS Date/Time Not Set
The time and/or date values stored in CMOS are invalid. Run
Setup to set correct values.
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.
continued
119
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 76.
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 NVRAM, CMOS, and passwords have been cleared. The system
Jumper
should be powered down and the jumper removed.
<CTRL_N> Pressed
120
CMOS is ignored and NVRAM is cleared. User must enter Setup.
Error Messages and Beep Codes
5.2 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 77 defines
the uncompressed INIT code checkpoints, Table 78 describes the boot block recovery code
checkpoints, and Table 79 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 77.
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 78.
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, Zip) 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 D845GEBV2/D845GERG2 Technical Product Specification
Table 79.
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 to start.
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 to 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 5.3 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 5.3 for details of
different buses.)
39
Display different buses initialization error messages. (See Section 5.3 for details of different
buses.)
3A
New cursor position read and saved. To display the Hit <DEL> message.
continued
122
Error Messages and Beep Codes
Table 79.
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 data 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. To initialize 8259 interrupt controller.
7F
Extended NMI sources enabling is in progress.
80
Keyboard test started. Clearing output buffer, 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 D845GEBV2/D845GERG2 Technical Product Specification
Table 79.
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 to be done next.
95
Init of different buses optional ROMs from C800 to start. (See Section 5.3 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 to 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
124
Error Messages and Beep Codes
Table 79.
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.
5.3 Bus Initialization Checkpoints
The system BIOS gives control to the different buses at several checkpoints to do various tasks.
Table 80 describes the bus initialization checkpoints.
Table 80.
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 81 describes the upper nibble of the high byte and indicates the function
that is being executed.
Table 81.
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.
125
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
Table 82 describes the lower nibble of the high byte and indicates the bus on which the routines are
being executed.
Table 82.
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
5.4 Speaker
A 47 Ω inductive speaker is mounted on the Desktop Board D845GEBV2 and the Desktop Board
D845GERG2. The 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 D845GEBV2
Figure 1, on page 14
The location of the onboard speaker on the Desktop Board D845GERG2
Figure 2, on page 15
5.5 BIOS Beep Codes
Whenever a recoverable error occurs during POST, the BIOS displays an error message describing
the problem (see Table 83). 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).
126
Error Messages and Beep Codes
If POST completes normally, the BIOS issues one short beep before passing control to the
operating system.
Table 83.
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.)
127
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
128
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