Intel® Desktop Boards
D915GAV/D915GAG
Technical Product Specification
December 2004
Order Number: C68600-002
The Intel® Desktop Board D915GAV/D915GAG 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 D915GAV/D915GAG Specification Update.
Revision History
Revision
Revision History
Date
Intel®
-001
First release of the
Product Specification.
Desktop Board D915GAV/D915GAG Technical
-002
Second release of the Intel Desktop Board D915GAV/D915GAG Technical
Product Specification.
June 2004
December 2004
This product specification applies to only standard Intel Desktop Boards D915GAV and D915GAV
with BIOS identifier EV91510A.86A.
Changes to this specification will be published in the Intel Desktop Board D915GAV/D915GAG
Specification Update before being incorporated into a revision of this document.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS. NO LICENSE,
EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED
BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL’S TERMS AND CONDITIONS OF SALE FOR SUCH
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provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other
intellectual property rights.
Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked “reserved” or “undefined.”
Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising
from future changes to them.
Intel® desktop boards may contain design defects or errors known as errata, which 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
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countries.
* Other names and brands may be claimed as the property of others.
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
power and environmental requirements, and the BIOS for these Intel® Desktop Boards: D915GAV
and D915GAG. It describes the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Boards
D915GAV and D915GAG 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
Description
A description of the hardware used on the Desktop Boards D915GAV and
D915GAG
A map of the resources of the Desktop Boards
The features supported by the BIOS Setup program
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.
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.
iii
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
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 D915GAV and D915GAG, 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
PCI Bus Terminology Change...................................................................................... 11
Board Differences ........................................................................................................ 11
Overview ...................................................................................................................... 12
1.3.1
Feature Summary.......................................................................................... 12
1.3.2
Manufacturing Options .................................................................................. 13
1.3.3
Board Layouts ............................................................................................... 14
1.3.4
Block Diagram ............................................................................................... 18
Online Support ............................................................................................................. 19
Processor ..................................................................................................................... 19
System Memory ........................................................................................................... 20
1.6.1
Memory Configurations ................................................................................. 22
®
Intel 915G Chipset ..................................................................................................... 26
1.7.1
Intel 915G Graphics Subsystem.................................................................... 26
1.7.2
USB ............................................................................................................... 28
1.7.3
IDE Support ................................................................................................... 28
1.7.4
Real-Time Clock, CMOS SRAM, and Battery................................................ 30
PCI Express Connectors.............................................................................................. 30
I/O Controller................................................................................................................ 31
1.9.1
Serial Ports .................................................................................................... 31
1.9.2
Parallel Port ................................................................................................... 31
1.9.3
Diskette Drive Controller................................................................................ 32
1.9.4
Keyboard and Mouse Interface ..................................................................... 32
Audio Subsystem ......................................................................................................... 32
1.10.1 Audio Subsystem Software ........................................................................... 33
1.10.2 Audio Connectors .......................................................................................... 33
1.10.3 Intel® High Definition Audio Subsystem ........................................................ 34
LAN Subsystem ........................................................................................................... 35
1.11.1 10/100 Mbits/sec LAN Subsystem................................................................. 35
1.11.2 Gigabit LAN Subsystem ................................................................................ 36
1.11.3 Alert Standard Format (ASF) Support ........................................................... 37
1.11.4 LAN Subsystem Software.............................................................................. 38
Hardware Management Subsystem............................................................................. 38
1.12.1 Hardware Monitoring and Fan Control ASIC ................................................. 38
1.12.2 Thermal Monitoring........................................................................................ 39
1.12.3 Fan Monitoring............................................................................................... 41
1.12.4 Chassis Intrusion and Detection.................................................................... 41
Power Management ..................................................................................................... 41
1.13.1 ACPI .............................................................................................................. 41
1.13.2 Hardware Support ......................................................................................... 44
Trusted Platform Module (Optional) ............................................................................. 48
1.14.1 System Requirements ................................................................................... 48
1.14.2 Warning of Potential Data Loss ..................................................................... 48
1.14.3 Security Precautions...................................................................................... 49
v
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.14.4
1.14.5
1.14.6
1.14.7
1.14.8
1.14.9
Trusted Platform Module Ownership ............................................................. 50
Enabling the Trusted Platform Module .......................................................... 51
Assuming Trusted Platform Module Ownership ............................................ 51
Recovery Procedures .................................................................................... 52
Clearing Trusted Platform Module Ownership............................................... 53
Software Support........................................................................................... 54
2 Technical Reference
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 .................................................................................................................. 55
Memory Resources ...................................................................................................... 55
2.2.1
Addressable Memory..................................................................................... 55
2.2.2
Memory Map.................................................................................................. 57
DMA Channels ............................................................................................................. 57
Fixed I/O Map............................................................................................................... 58
PCI Configuration Space Map...................................................................................... 59
Interrupts ...................................................................................................................... 60
PCI Conventional Interrupt Routing Map ..................................................................... 61
Connectors................................................................................................................... 63
2.8.1
Back Panel Connectors ................................................................................. 64
2.8.2
Component-side Connectors......................................................................... 66
Jumper Block ............................................................................................................... 77
Mechanical Considerations .......................................................................................... 78
2.10.1 D915GAV Board Form Factor ....................................................................... 78
2.10.2 D915GAG Board Form Factor....................................................................... 79
2.10.3 I/O Shield....................................................................................................... 80
Electrical Considerations.............................................................................................. 81
2.11.1 DC Loading.................................................................................................... 81
2.11.2 Add-in Board Considerations......................................................................... 81
2.11.3 Fan Connector Current Capability ................................................................. 82
2.11.4 Power Supply Considerations ....................................................................... 82
Thermal Considerations ............................................................................................... 83
Reliability...................................................................................................................... 85
Environmental .............................................................................................................. 86
Regulatory Compliance................................................................................................ 87
2.15.1 Safety Regulations ........................................................................................ 87
2.15.2 EMC Regulations........................................................................................... 87
2.15.3 European Union Declaration of Conformity Statement.................................. 88
2.15.4 Product Ecology Statements ......................................................................... 89
2.15.5 Product Certification Markings (Board Level) ................................................ 90
3 Overview of BIOS Features
3.1
3.2
3.3
3.4
3.5
vi
Introduction .................................................................................................................. 91
BIOS Flash Memory Organization ............................................................................... 92
Resource Configuration ............................................................................................... 92
3.3.1
PCI Autoconfiguration.................................................................................... 92
3.3.2
PCI IDE Support ............................................................................................ 92
System Management BIOS (SMBIOS) ........................................................................ 93
Legacy USB Support.................................................................................................... 93
Contents
3.6
3.7
3.8
3.9
BIOS Updates .............................................................................................................. 94
3.6.1
Language Support ......................................................................................... 94
3.6.2
Custom Splash Screen.................................................................................. 94
Boot Options ................................................................................................................ 95
3.7.1
CD-ROM Boot ............................................................................................... 95
3.7.2
Network Boot ................................................................................................. 95
3.7.3
Booting Without Attached Devices ................................................................ 95
3.7.4
Changing the Default Boot Device During POST .......................................... 95
Fast Booting Systems with Intel® Rapid BIOS Boot..................................................... 96
3.8.1
Peripheral Selection and Configuration ......................................................... 96
3.8.2
Intel Rapid BIOS Boot ................................................................................... 96
BIOS Security Features ............................................................................................... 97
4 Error Messages and Beep Codes
4.1
4.2
4.3
4.4
4.5
BIOS Error Messages .................................................................................................. 99
Port 80h POST Codes ............................................................................................... 101
Bus Initialization Checkpoints .................................................................................... 105
Speaker...................................................................................................................... 106
BIOS Beep Codes...................................................................................................... 106
Figures
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
D915GAV Board Components ..................................................................................... 14
D915GAG Board Components..................................................................................... 16
Block Diagram.............................................................................................................. 18
Memory Channel and DIMM Configuration.................................................................. 22
Dual Channel (Interleaved) Mode Configuration with Two DIMMs .............................. 23
Dual Channel (Interleaved) Mode Configuration with Three DIMMs............................ 23
Dual Channel (Interleaved) Mode Configuration with Four DIMMs.............................. 24
Single Channel (Asymmetric) Mode Configuration with One DIMM............................. 25
Single Channel (Asymmetric) Mode Configuration with Three DIMMs ........................ 25
Front/Back Panel Audio Connector Options for High Definition Audio Subsystem...... 34
High Definition Audio Subsystem Block Diagram ........................................................ 34
LAN Connector LED Locations .................................................................................... 36
LAN Connector LED Locations .................................................................................... 37
Thermal Monitoring for D915GAV Board ..................................................................... 39
Thermal Monitoring for D915GAG Board..................................................................... 40
Location of the Standby Power Indicator LED ............................................................. 47
Detailed System Memory Address Map....................................................................... 56
Back Panel Connectors................................................................................................ 64
D915GAV Board Component-side Connectors............................................................ 66
D915GAG Board Component-side Connectors ........................................................... 68
Connection Diagram for Front Panel Connector .......................................................... 74
Connection Diagram for Front Panel USB Connectors................................................ 76
Connection Diagram for IEEE 1394a Connectors........................................................ 76
Location of the Jumper Block....................................................................................... 77
D915GAV Board Dimensions....................................................................................... 78
D915GAG Board Dimensions ...................................................................................... 79
vii
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
27.
28.
29.
I/O Shield Dimensions.................................................................................................. 80
Processor Heatsink for Omni-directional Airflow.......................................................... 83
Localized High Temperature Zones ............................................................................. 84
Tables
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
viii
Summary of Board Differences .................................................................................... 11
Feature Summary ........................................................................................................ 12
Manufacturing Options ................................................................................................. 13
D915GAV Board Components Shown in Figure 1 ....................................................... 15
D915GAG Board Components Shown in Figure 2....................................................... 17
Supported System Bus Frequency and Memory Speed Combinations ....................... 20
Supported Memory Configurations .............................................................................. 21
LAN Connector LED States ......................................................................................... 36
LAN Connector LED States ......................................................................................... 37
Effects of Pressing the Power Switch .......................................................................... 42
Power States and Targeted System Power ................................................................. 43
Wake-up Devices and Events ...................................................................................... 44
System Memory Map ................................................................................................... 57
DMA Channels ............................................................................................................. 57
I/O Map ........................................................................................................................ 58
PCI Configuration Space Map...................................................................................... 59
Interrupts ...................................................................................................................... 60
PCI Interrupt Routing Map ........................................................................................... 62
Back Panel Connectors Shown in Figure 18................................................................ 65
Component-side Connectors Shown in Figure 19 ....................................................... 67
Component-side Connectors Shown in Figure 20 ....................................................... 69
S/PDIF Connector (Optional) ....................................................................................... 70
ATAPI CD-ROM Connector (Optional)......................................................................... 70
Front Panel Audio Connector....................................................................................... 70
Serial Port B Connector (optional) ............................................................................... 70
Chassis Intrusion Connector ........................................................................................ 70
SCSI Hard Drive Activity LED Connector (Optional).................................................... 71
Serial ATA Connectors................................................................................................. 71
Processor Fan Connector ............................................................................................ 71
Chassis Fan Connectors.............................................................................................. 71
Main Power Connector................................................................................................. 72
ATX12V Power Connector ........................................................................................... 73
Alternate Power Connector .......................................................................................... 73
Auxiliary Front Panel Power/Sleep LED Connector ..................................................... 74
Front Panel Connector ................................................................................................. 74
States for a One-Color Power LED .............................................................................. 75
States for a Two-Color Power LED .............................................................................. 75
BIOS Setup Configuration Jumper Settings................................................................. 77
DC Loading Characteristics ......................................................................................... 81
Fan Connector Current Capability................................................................................ 82
Thermal Considerations for Components .................................................................... 85
Environmental Specifications ....................................................................................... 86
Contents
43.
44.
45.
46.
47.
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
Safety Regulations ....................................................................................................... 87
EMC Regulations ......................................................................................................... 87
Product Certification Markings ..................................................................................... 90
BIOS Setup Program Menu Bar................................................................................... 92
BIOS Setup Program Function Keys............................................................................ 92
Boot Device Menu Options .......................................................................................... 95
Supervisor and User Password Functions ................................................................... 97
BIOS Error Messages .................................................................................................. 99
Uncompressed INIT Code Checkpoints..................................................................... 101
Boot Block Recovery Code Checkpoints ................................................................... 101
Runtime Code Uncompressed in F000 Shadow RAM ............................................... 102
Bus Initialization Checkpoints .................................................................................... 105
Upper Nibble High Byte Functions ............................................................................. 105
Lower Nibble High Byte Functions ............................................................................. 106
Beep Codes ............................................................................................................... 106
ix
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
x
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
PCI Bus Terminology Change...................................................................................... 11
Board Differences ........................................................................................................ 11
Overview ...................................................................................................................... 12
Online Support ............................................................................................................. 19
Processor ..................................................................................................................... 19
System Memory ........................................................................................................... 20
Intel® 915G Chipset ..................................................................................................... 26
PCI Express Connectors.............................................................................................. 30
I/O Controller................................................................................................................ 31
Audio Subsystem ......................................................................................................... 32
LAN Subsystem ........................................................................................................... 35
Hardware Management Subsystem............................................................................. 38
Power Management ..................................................................................................... 41
Trusted Platform Module (Optional) ............................................................................. 48
1.1 PCI Bus Terminology Change
Previous generations of Intel® Desktop Boards used an add-in card connector referred to as PCI.
This generation of Intel Desktop Boards adds a new technology for add-in cards: PCI Express.
The 32-bit parallel bus previously referred to as PCI is now called PCI Conventional.
1.2 Board Differences
This TPS describes these Intel Desktop Boards: D915GAV and D915GAG. The Desktop Boards
are identical with the exception of the items listed in Table 1.
Table 1.
Summary of Board Differences
D915GAV
D915GAG
Form factor
ATX
microATX
PCI Conventional Bus
add-in card connectors
Four
Two
PCI Express x1 bus addin card connectors
Two
One
Chassis fan connectors
Three: front chassis, rear chassis 1,
and rear chassis 2
Two: front chassis and rear chassis
LAN configuration
10/100 Mbits/sec LAN subsystem
only
One of the following:
• Gigabit (10/100/1000 Mbits/sec)
LAN subsystem
• 10/100 Mbits/sec LAN subsystem
• No LAN subsystem
11
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
NOTE
Most of the illustrations in this document show only the Desktop Board D915GAV. When there are
significant differences between the two Desktop Boards, illustrations of both boards are provided.
1.3 Overview
1.3.1
Feature Summary
Table 2 summarizes the major features of the Desktop Boards D915GAV and D915GAG.
Table 2.
Feature Summary
Form Factor
• D915GAV: ATX (12.00 inches by 9.60 inches [304.80 millimeters by
243.84 millimeters])
• D915GAG: microATX Form Factor (9.60 inches by 9.60 inches [243.84
millimeters by 243.84 millimeters])
Processor
Support for an Intel® Pentium® 4 processor in an LGA775 socket with an 800 or
533 MHz system bus
Memory
• Four DDR SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for DDR 400 MHz and DDR 333 MHz DIMMs
• Support for up to 4 GB of system memory
Chipset
Intel® 915G Chipset, consisting of:
• Intel® 82915G Graphics Memory Controller Hub (GMCH)
• Intel® 82801FB I/O Controller Hub (ICH6)
• 4 Mbit Firmware Hub (FWH)
Video
Intel® GMA900 onboard graphics subsystem
Audio
Intel® High Definition Audio subsystem using the Realtek ALC860 audio codec
I/O Control
LPC Bus I/O controller
USB
Support for USB 2.0 devices
Peripheral
Interfaces
• Eight USB ports
• One serial port
• One parallel port
• Four Serial ATA interfaces
• One Parallel ATA IDE interface with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2* keyboard and mouse ports
LAN Support
• D915GAV: 10/100 Mbits/sec LAN subsystem using the Intel® 82562EZ Platform
LAN Connect (PLC) device
• D915GAG: Refer to Table 3 on page 13 for a description of LAN subsystem
options.
BIOS
• Intel/AMI BIOS (resident in the 4 Mbit FWH)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
continued
12
Product Description
Table 2.
Feature Summary (continued)
Expansion
Capabilities
• PCI Conventional bus connectors (four on the D915GAV; two on the D915GAG)
Instantly Available
PC Technology
• Support for PCI Local Bus Specification Revision 2.2
• PCI Express x1 bus add-in card connectors (two on the D915GAV; one on the
D915GAG)
• One PCI Express x16 bus add-in card connector (both boards)
• Support for PCI Express Revision 1.0a
• Suspend to RAM support
• Wake on PCI, RS-232, front panel, PS/2 devices, and USB ports
• Hardware monitoring and fan control ASIC
Hardware Monitor
Subsystem
• Voltage sense to detect out of range power supply voltages
• Thermal sense to detect out of range thermal values
• Three fan connectors
• Three fan sense inputs used to monitor fan activity
• Fan speed control
1.3.2
Manufacturing Options
Table 3 describes the manufacturing options on the Desktop Boards D915GAV and D915GAG.
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
ATAPI CD-ROM
Connector
A connector for attaching an internal CD-ROM drive to the onboard audio subsystem
ATX fan
connector
Additional fan connector for use in larger chassis (D915GAV board only)
IEEE-1394a
Interface
IEEE-1394a controller and three IEEE-1394a connectors (one back panel connector,
two front-panel connectors)
LAN subsystem
The D915GAG board provides one of the following:
• Gigabit (10/100/1000 Mbits/sec) LAN subsystem using the Marvel* Yukon*
88E8050 PCI Express Gigabit Ethernet Controller
• 10/100 Mbits/sec LAN subsystem using the Intel® 82562EZ Platform LAN Connect
(PLC) device
• No LAN subsystem
SCSI Hard Drive
Activity LED
Connector
Allows add-in hard drive controllers (SCSI or other) to use the same LED as the
onboard IDE controller.
Serial Port B
Second serial port accessible via a connector on the component side of the board
S/PDIF Connector
A 1 x 3 connector (mounted on the component side of the board) that provides digital
audio signals in S/PDIF format
Trusted Platform
Module (TPM)
A component that enhances platform security
For information about
Refer to
Available configurations for the Desktop Boards D915GAV and D915GAG
Section 1.4, page 19
13
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.3.3
Board Layouts
Figure 1 shows the location of the major components on the Desktop Board D915GAV.
A
D F G
B
C
E
H I
J
K
L
M
N
O
MM
LL
KK
JJ
P
Q
R
II
S
T
HH
U
FF
GG
DD BB
EE
CC AA Z
Y
X
W V
OM16666
Figure 1. D915GAV Board Components
Table 4 lists the components identified in Figure 1.
14
Product Description
Table 4.
D915GAV Board Components Shown in Figure 1
Item/callout
from Figure 1
Description
A
Rear fan connector 2
B
Speaker
C
PCI Express x1 bus add-in card connectors
D
ATAPI CD-ROM connector (optional)
E
S/PDIF connector (optional)
F
Realtek ALC860 audio codec
G
Front panel audio connector
H
PCI Conventional bus add-in card connectors
I
Ethernet PLC device (optional)
J
PCI Express x16 bus add-in card connector
K
Rear chassis fan connector 1
L
Back panel connectors
M
Alternate power connector
N
+12V power connector (ATX12V)
O
LGA775 processor socket
P
Processor fan connector
Q
Intel 82915G GMCH
R
DIMM Channel A sockets
S
Serial port B connector (optional)
T
DIMM Channel B sockets
U
SCSI LED (optional)
V
I/O controller
W
Power connector
X
Diskette drive connector
Y
Parallel ATE IDE connector
Z
Battery
AA
Chassis intrusion connector
BB
BIOS Setup configuration jumper block
CC
4 Mbit Firmware Hub (FWH)
DD
Front chassis fan connector
EE
Serial ATA connectors
FF
Auxiliary front panel power LED connector
GG
Front panel connector
HH
ATX fan connector (optional)
II
Front panel USB connector
JJ
Intel 82801FB I/O Controller Hub (ICH6)
KK
Front panel IEEE-1394a connectors (optional)
LL
IEEE-1394a controller (optional)
MM
PCI Conventional bus add-in card connectors
15
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
Figure 2 shows the location of the major components on the Desktop Board D915GAG.
A C E
B D
FG H
I
J
K
L
KK
M
JJ
II
HH
N
O
P
Q
R
S
GG
T
EE
FF
DD
CC AA
BB Z Y
X
W
V
U
OM16656
Figure 2. D915GAG Board Components
Table 5 lists the components identified in Figure 2.
16
Product Description
Table 5.
D915GAG Board Components Shown in Figure 2
Item/callout
from Figure 2
Description
A
ATAPI CD-ROM connector (optional)
B
PCI Express x1 bus add-in card connectors
C
Realtek ALC860 audio codec
D
S/PDIF connector (optional)
E
Front panel audio connector
F
PCI Conventional bus add-in card connectors
G
Ethernet PLC device (optional)
H
PCI Express x16 bus add-in card connector
I
Rear chassis fan connector
J
Back panel connectors
K
Alternate power connector
L
+12V power connector (ATX12V)
M
LGA775 processor socket
N
Hardware monitoring and fan control ASIC
O
Processor fan connector
P
Intel 82915G GMCH
Q
DIMM Channel A sockets
R
Serial port B connector (optional)
S
DIMM Channel B sockets
T
SCSI LED connector (optional)
U
I/O controller
V
Power connector
W
Diskette drive connector
X
Parallel ATE IDE connector
Y
Battery
Z
Chassis intrusion connector
AA
BIOS Setup configuration jumper block
BB
4 Mbit Firmware Hub (FWH)
CC
Front chassis fan connector
DD
Serial ATA connectors
EE
Auxiliary front panel power LED connector
FF
Front panel connector
GG
Front panel USB connector
HH
Intel 82801FB I/O Controller Hub (ICH6)
II
Front panel IEEE-1394a connectors (optional)
JJ
IEEE-1394a controller (optional)
KK
Speaker
17
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.3.4
Block Diagram
Figure 3 is a block diagram of the major functional areas of the boards.
D915GAG only
Gigabit Ethernet
Controller (Optional)
PCI Express x1 Interface
PCI Express x1 Slot 1
PCI Express x1 Slot 2
Back Panel/Front Panel
USB Ports
USB
D915GAV
only
LAN
Connector
Serial Ports
Parallel ATA
IDE Connector
LPC Bus
I/O
Controller
Parallel ATA
IDE Interface
Parallel Port
PS/2 Mouse
PS/2 Keyboard
LGA775
Processor Socket
System Bus
(800/533 MHz)
Diskette Drive
Connector
PCI Express
x16
Connector
VGA
Port
Intel 82801FB
I/O Controller Hub
(ICH6)
Display Interface
Channel A
DIMMs (2)
SMBus
Channel B
DIMMs (2)
IEEE-1394a Connectors
(Optional)
PCI Bus
PCI Bus
High Definition Audio Link
Dual-Channel
Memory Bus
4 Mbit
Firmware Hub
(FWH)
LPC Bus
Intel 82915G
Graphics and
Memory Controller
Hub (GMCH)
LAN Connect
Interface
PCI Express
x16 Interface
DMI Interconnect
LPC Bus
Intel 915G Chipset
TPM Component
(Optional)
10/100
LAN PLC
(Optional)
Serial ATA
IDE Interface
LAN
Connector
Serial ATA IDE
Connectors (4)
Mic In/Retasking Jack B
PCI Slot 1
Line In/Retasking Jack C
PCI Slot 2
SMBus
PCI Slot 3
PCI Slot 4
D915GAV
only
Audio
Codec
Hardware Monitoring
and Fan Control ASIC
Line Out/Retasking Jack D
Retasking Jack E [Port 1]
Retasking Jack F [Port 2]
CD-ROM (optional)
S/PDIF (optional)
= connector or socket
OM17551
Figure 3. Block Diagram
18
Product Description
1.4 Online Support
To find information about…
Visit this World Wide Web site:
Intel Desktop Boards D915GAV and
D915GAG under “Desktop Board
Products” or “Desktop Board Support”
http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop
Available configurations for the Desktop
Board D915GAV
http://developer.intel.com/design/motherbd/av/av_available.htm
Available configurations for the Desktop
Board D915GAG
http://developer.intel.com/design/motherbd/ag/ag_available.htm
Processor data sheets
http://www.intel.com/design/litcentr
ICH6 addressing
http://developer.intel.com/design/chipsets/datashts
Custom splash screens
http://intel.com/design/motherbd/gen_indx.htm
Audio software and utilities
http://www.intel.com/design/motherbd
LAN software and drivers
http://www.intel.com/design/motherbd
1.5 Processor
The boards are designed to support Intel Pentium 4 processors in an LGA775 processor socket with
an 800 or 533 MHz system bus. See the Intel web site listed below for the most up-to-date list of
supported processors.
For information about…
Refer to:
Supported processors for the D915GAV board
http://www.intel.com/design/motherbd/av/av_proc.htm
Supported processors for the D915GAG board
http://www.intel.com/design/motherbd/ag/ag_proc.htm
CAUTION
Use only the processors listed on web site above. Use of unsupported processors can damage the
board, the processor, and the power supply.
#
INTEGRATOR’S NOTE
•
•
Use only ATX12V-compliant power supplies.
Refer to Table 6 on page 20 for a list of supported system bus frequency and memory speed
combinations.
For information about
Refer to
Power supply connectors
Section 2.8.2.2, page 72
19
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.6 System Memory
The boards have four DIMM sockets and support the following memory features:
• 2.5 V (only) DDR SDRAM DIMMs with gold-plated contacts
• Unbuffered, single-sided or double-sided DIMMs with the following restriction:
•
•
•
•
•
Double-sided DIMMS with x16 organization are not supported.
4 GB maximum total system memory. Refer to Section 2.2.1 on page 55 for information on the
total amount of addressable memory.
Minimum total system memory: 128 MB
Non-ECC DIMMs
Serial Presence Detect
DDR 400 MHz and DDR 333 MHz SDRAM DIMMs
Table 6 lists the supported system bus frequency and memory speed combinations.
Table 6.
Supported System Bus Frequency and Memory Speed Combinations
To use this type of DIMM…
The processor's system bus frequency must be…
DDR 400
800 MHz
DDR 333 (Note)
800 or 533 MHz
Note:
When using an 800 MHz system bus frequency processor, DDR 333 memory is clocked at 320 MHz. This minimizes
system latencies to optimize system throughput.
NOTES
•
•
20
Remove the PCI Express x16 video card before installing or upgrading memory to avoid
interference with the memory retention mechanism.
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. If non-SPD memory is installed, the BIOS will
attempt to correctly configure the memory settings, but performance and reliability may be
impacted or the DIMMs may not function under the determined frequency.
Product Description
Table 7 lists the supported DIMM configurations.
Table 7.
Supported Memory Configurations
DIMM
Capacity
Configuration
SDRAM
Density
SDRAM Organization
Front-side/Back-side
Number of SDRAM
Devices
128 MB
SS
256 Mbit
16 M x 16/empty
4
256 MB
SS
256 Mbit
32 M x 8/empty
8
256 MB
SS
512 Mbit
32 M x 16/empty
4
512 MB
DS
256 Mbit
32 M x 8/32 M x 8
16
512 MB
SS
512 Mbit
64 M x 8/empty
8
512 MB
SS
1 Gbit
64 M x 16/empty
4
1024 MB
DS
512 Mbit
64 M x 8/64 M x 8
16
1024 MB
SS
1 Gbit
128 M x 8/empty
8
2048 MB
DS
1 Gbit
128 M x 8/128 M x 8
16
Note: In the second column, “DS” refers to double-sided memory modules (containing two rows of SDRAM) and “SS” refers
to single-sided memory modules (containing one row of SDRAM).
#
INTEGRATOR’S NOTE
It is possible to install four 2048 MB (2 GB) modules for a total of 8 GB of system memory,
however, only 4 GB of address space is available. Refer to Section 2.2.1, on page 55 for additional
information on available memory.
21
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.6.1
Memory Configurations
The Intel 82915G GMCH supports two types of memory organization:
• Dual channel (Interleaved) mode. This mode offers the highest throughput for real world
applications. Dual channel mode is enabled when the installed memory capacities of both
DIMM channels are equal. Technology and device width can vary from one channel to the
other but the installed memory capacity for each channel must be equal. If different speed
DIMMs are used between channels, the slowest memory timing will be used.
• Single channel (Asymmetric) mode. This mode is equivalent to single channel bandwidth
operation for real world applications. This mode is used when only a single DIMM is installed
or the memory capacities are unequal. Technology and device width can vary from one
channel to the other. If different speed DIMMs are used between channels, the slowest
memory timing will be used.
Figure 4 illustrates the memory channel and DIMM configuration.
NOTE
The DIMM0 sockets of both channels are blue. The DIMM1 sockets of both channels are black.
Channel A, DIMM 0
Channel A, DIMM 1
Channel B, DIMM 0
Channel B, DIMM 1
OM16667
Figure 4. Memory Channel and DIMM Configuration
22
Product Description
1.6.1.1
Dual Channel (Interleaved) Mode Configurations
Figure 5 shows a dual channel configuration using two DIMMs. In this example, the DIMM0
(blue) sockets of both channels are populated with identical DIMMs.
1 GB
Channel A, DIMM 0
Channel A, DIMM 1
1 GB
Channel B, DIMM 0
Channel B, DIMM 1
OM17123
Figure 5. Dual Channel (Interleaved) Mode Configuration with Two DIMMs
Figure 6 shows a dual channel configuration using three DIMMs. In this example, the combined
capacity of the two DIMMs in Channel A equal the capacity of the single DIMM in the DIMM0
(blue) socket of Channel B.
256 MB
256 MB
Channel A, DIMM 0
Channel A, DIMM 1
512 MB
Channel B, DIMM 0
Channel B, DIMM 1
OM17122
Figure 6. Dual Channel (Interleaved) Mode Configuration with Three DIMMs
23
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
Figure 7 shows a dual channel configuration using four DIMMs. In this example, the combined
capacity of the two DIMMs in Channel A equal the combined capacity of the two DIMMs in
Channel B. Also, the DIMMs are matched between DIMM0 and DIMM1 of both channels.
256 MB
512 MB
Channel A, DIMM 0
Channel A, DIMM 1
256 MB
512 MB
Channel B, DIMM 0
Channel B, DIMM 1
OM17124
Figure 7. Dual Channel (Interleaved) Mode Configuration with Four DIMMs
24
Product Description
1.6.1.2
Single Channel (Asymmetric) Mode Configurations
NOTE
Dual channel (Interleaved) mode configurations provide the highest memory throughput.
Figure 8 shows a single channel configuration using one DIMM. In this example, only the DIMM0
(blue) socket of Channel A is populated. Channel B is not populated.
256 MB
Channel A, DIMM 0
Channel A, DIMM 1
Channel B, DIMM 0
Channel B, DIMM 1
OM17125
Figure 8. Single Channel (Asymmetric) Mode Configuration with One DIMM
Figure 9 shows a single channel configuration using three DIMMs. In this example, the combined
capacity of the two DIMMs in Channel A does not equal the capacity of the single DIMM in the
DIMM0 (blue) socket of Channel B.
256 MB
512 MB
Channel A, DIMM 0
Channel A, DIMM 1
512 MB
Channel B, DIMM 0
Channel B, DIMM 1
OM17126
Figure 9. Single Channel (Asymmetric) Mode Configuration with Three DIMMs
25
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.7 Intel® 915G Chipset
The Intel 915G chipset consists of the following devices:
• Intel 82915G Graphics Memory Controller Hub (GMCH) with Direct Media Interface (DMI)
interconnect
• Intel 82801FB I/O Controller Hub (ICH6) with DMI interconnect
• Firmware Hub (FWH)
The GMCH is a centralized controller for the system bus, the memory bus, the PCI Express bus,
and the DMI interconnect. The ICH6 is a centralized controller for the board’s I/O paths. The
FWH provides the nonvolatile storage of the BIOS.
For information about
Refer to
The Intel 915G chipset
http://developer.intel.com/
Resources used by the chipset
Chapter 2
1.7.1
Intel 915G Graphics Subsystem
The Intel 915G chipset contains two separate, mutually exclusive graphics options. Either the
GMA900 graphics controller (contained within the 82915G GMCH) is used, or a PCI Express x16
add-in card can be used. When a PCI Express x16 add-in card is installed, the GMA900 graphics
controller is disabled.
1.7.1.1
Intel® GMA900 Graphics Controller
The Intel GMA900 graphics controller features the following:
• Integrated graphics controller
⎯ 32 bpp (Bits Per Pixel) graphics engine
⎯ 333 MHz core frequency
⎯ 256-bit 2-D engine
⎯ 32-bit 3-D engine
⎯ Motion video acceleration
⎯ Pixel Shader 2.0
⎯ 4-pixel pipes
⎯ DirectX* 9.0 Hardware Acceleration
⎯ Software Vertex Shader
• Up to 2048 x 1536 at 75 Hz refresh
• With Advanced Digital Display 2 (ADD2) card support flat panel displays up to 2048 x 1536 at
75 Hz or digital CRTs/HDTV displays at 1920 x 1080 at 85 Hz
• High performance 3-D setup and render engine
• High quality/performance texture engine
• Display
⎯ Integrated 24-bit 400 MHz RAMDAC
⎯ DDC2B compliant interface
26
Product Description
•
•
•
Video
⎯ Asynchronous dual monitor display with ADD2 card
⎯ Hardware motion compensation for software MPEG2 decode
⎯ Two multiplexed DVO port interfaces with 200 MHz pixel clocks using an ADD2 card
Dynamic Video Memory Technology (DVMT) support up to 224 MB
Intel® Zoom Utility
For information about
Refer to
DVMT
Section 1.7.1.2, page 27
Obtaining graphics software and utilities
Section 1.4, page 19
1.7.1.2
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 for
maximum 2-D/3-D graphics performance. Up to 224 MB of system memory can be allocated to
DVMT on systems that have 512 MB or more of total system memory installed. Up to 128 MB can
be allocated to DVMT on systems that have 256 MB but less than 512 MB of total installed system
memory. Up to 64 MB can be allocated to DVMT when less than 256 MB of system memory is
installed. DVMT returns system memory back to the operating system when the additional system
memory is no longer required by the graphics subsystem.
DVMT will always use a minimal fixed 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
additional system memory to the graphics buffer as needed for performing graphics functions.
NOTE
The use of DVMT requires operating system driver support.
1.7.1.3
Advanced Digital Display 2 (ADD2) Card Support
The GMCH routes two multiplexed DVO ports that are each capable of driving up to a 200 MHz
pixel clock to the PCI Express x16 connector. The DVO ports can be paired for a dual channel
configuration to support up to a 400 MHz pixel clock. When an ADD2 card is detected, the Intel
GMA900 graphics controller is enabled and the PCI Express x16 connector is configured for DVO
mode. DVO mode enables the DVO ports to be accessed by the ADD2 card. An ADD2 card can
either be configured to support simultaneous display with the primary VGA display or can be
configured to support dual independent display as an extended desktop configuration with different
color depths and resolutions. ADD2 cards can be designed to support the following configurations:
• TV-Out (composite video)
• Transition Minimized Differential Signaling (TMDS) for DVI 1.0
• Low Voltage Differential Signaling (LVDS)
• Single device operating in dual channel mode
• VGA output
• HDTV output
27
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.7.1.4
Configuration Modes
A list of supported modes for the Intel GMA900 graphics controller is available as a downloadable
document.
For information about
Refer to
Supported modes for the D915GAV board
http://www.intel.com/design/motherbd/av/av_prdoc.htm
Supported modes for the D915GAG board
http://www.intel.com/design/motherbd/ag/ag_prdoc.htm
1.7.2
USB
The boards support up to eight USB 2.0 ports, supports UHCI and EHCI, and uses UHCI- and
EHCI-compatible drivers.
The ICH6 provides the USB controller for all ports. The port arrangement is as follows:
• Four ports are implemented with dual stacked back panel connectors adjacent to the audio
connectors
• Four ports are routed to two separate front panel USB connectors
NOTE
Computer systems that have an unshielded cable attached to a USB port may not meet FCC
Class B requirements, even if no device is attached to the cable. Use shielded cable that meets the
requirements for full-speed devices.
For information about
Refer to
The location of the USB connectors on the back panel
Figure 18, page 64
The location of the front panel USB connectors on the D915GAV board
Figure 19, page 66
The location of the front panel USB connectors on the D915GAG board
Figure 20, page 68
1.7.3
IDE Support
The boards provides five IDE interface connectors:
• One parallel ATA IDE connector that supports two devices
• Four serial ATA IDE connectors that support one device per connector
1.7.3.1
Parallel ATE IDE Interface
The ICH6’s Parallel ATA IDE controller has one bus-mastering Parallel ATA IDE interface. The
Parallel ATA IDE interface supports 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 ICH6’s ATA-100
logic can achieve read transfer rates up to 100 MB/sec and write transfer rates up to 88 MB/sec.
28
Product Description
NOTE
ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections,
noise, and inductive coupling.
The Parallel ATA IDE interface also supports ATAPI devices (such as CD-ROM drives) and ATA
devices using the transfer modes.
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 boards support Laser Servo (LS-120) diskette technology through the Parallel ATA 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 Parallel ATA IDE connector on the D915GAV board
Figure 19, page 66
The location of the Parallel ATA IDE connector on the D915GAG board
Figure 20, page 68
1.7.3.2
Serial ATA Interfaces
The ICH6’s Serial ATA controller offers four independent Serial ATA ports with a theoretical
maximum transfer rate of 150 MB/s per port. One device can be installed on each port for a
maximum of four Serial ATA devices. A point-to-point interface is used for host to device
connections, unlike Parallel ATA IDE which supports a master/slave configuration and two devices
per channel.
For compatibility, the underlying Serial ATA functionality is transparent to the operating system.
The Serial ATA controller can operate in both legacy and native modes. In legacy mode, standard
IDE I/O and IRQ resources are assigned (IRQ 14 and 15). In Native mode, standard PCI
Conventional bus resource steering is used. Native mode is the preferred mode for configurations
using the Windows* XP and Windows 2000 operating systems.
NOTE
Many Serial ATA drives use new low-voltage power connectors and require adaptors or power
supplies equipped with low-voltage power connectors.
For more information, see: http://www.serialata.org/
For information about
Refer to
The location of the Serial ATA IDE connectors on the D915GAV board
Figure 19, page 66
The location of the Serial ATA IDE connectors on the D915GAG board
Figure 20, page 68
29
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.7.3.3
SCSI Hard Drive Activity LED Connector (Optional)
The SCSI hard drive activity LED connector is a 1 x 2-pin connector that allows an add-in
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 hard drive controller. The LED
indicates when data is being read from, or written to, either the add-in hard drive controller or the
onboard IDE controller (Parallel ATA or Serial ATA).
For information about
Refer to
The location of the SCSI hard drive activity LED connector on the D915GAV board
Figure 19, page 66
The location of the SCSI hard drive activity LED connector on the D915GAG board
Figure 20, page 68
The signal names of the SCSI hard drive activity LED connector
Table 27, page 71
1.7.4
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.
1.8 PCI Express Connectors
The boards provide the following PCI Express connectors:
• One PCI Express x16 connector supporting simultaneous transfer speeds up to 8 GBytes/sec
• Two PCI Express x1 connectors. The x1 interfaces support simultaneous transfer speeds up to
500 MBytes/sec
The PCI Express interface supports the PCI Conventional bus configuration mechanism so that the
underlying PCI Express architecture is compatible with PCI Conventional compliant operating
systems. Additional features of the PCI Express interface include the following:
• Support for the PCI Express enhanced configuration mechanism
• Automatic discovery, link training, and initialization
• Support for Active State Power Management (ASPM)
• SMBus 2.0 support
• Wake# signal supporting wake events from ACPI S1, S3, S4, or S5
• Software compatible with the PCI Power Management Event (PME) mechanism defined in the
PCI Power Management Specification Rev. 1.1
30
Product Description
1.9 I/O Controller
The I/O controller provides the following features:
• Two serial ports (Serial Port B is optional)
• One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
• Serial IRQ interface compatible with serialized IRQ support for PCI Conventional bus 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 Conventional bus power management support
The BIOS Setup program provides configuration options for the I/O controller.
1.9.1
Serial Ports
The Desktop Board can support up to two serial port connectors. Serial port A is located on the
back panel. Serial port B (optional) is accessible using a connector on the component side of board.
The serial ports support data transfers at speeds up to 115.2 kbits/sec with BIOS support.
For information about
Refer to
The location of the serial port A connector
Figure 18, page 64
The location of the serial port B connector on the D915GAV board
Figure 19, page 66
The location of the serial port B connector on the D915GAG board
Figure 20, page 68
The signal names of the serial port B connector
Table 25, page 70
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 18, page 64
31
Intel Desktop Board D915GAV/D915GAG 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 D915GAV board
Figure 19, page 66
The location of the diskette drive connector on the D915GAG board
Figure 20, page 68
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.
For information about
Refer to
The location of the keyboard and mouse connectors
Figure 18, page 64
1.10 Audio Subsystem
The boards support the Intel High Definition audio subsystem based on the Realtek ALC860 codec.
The audio subsystem supports the following features:
• Advanced jack sense (front and rear panel) that enables the audio codec to recognize the device
that is connected to an audio port. All jacks are capable of retasking according to user’s
definition, or can be automatically switched depending on the recognized device type.
• Stereo input and output for all jacks
• A signal-to-noise (S/N) ratio of 90 dB
#
INTEGRATOR’S NOTE
For the front panel jack sensing and automatic retasking feature to function, a front panel daughter
card that is designed for Intel High Definition Audio must be used. Otherwise, an AC ’97 style
audio front panel connector will be assumed and the Line Out and Mic In functions will be
permanent.
32
Product Description
1.10.1
Audio Subsystem Software
Audio software and drivers are available from Intel’s World Wide Web site.
For information about
Refer to
Obtaining audio software and drivers
Section 1.4, page 19
1.10.2
Audio Connectors
The boards contain audio connector on both the back panel and the component side of the board.
The component-side audio connectors include the following:
• Front panel audio (a 2 x 5-pin connector that provides mic in and line out signals for front panel
audio connectors)
• ATAPI CD-ROM (an optional 1 x 4-pin ATAPI-style connector for connecting an internal
ATAPI CD-ROM drive to the audio mixer)
• S/PDIF (an optional 1 x 3 connector that provides S/PDIF output signals)
The functions of the back panel audio connectors are dependent on which subsystem is present.
For information about
Refer to
The location of the front panel audio connector, the optional ATAPI CD-ROM
connector, and the optional S/PDIF connector on the D915GAV board
Figure 19, page 66
The location of the front panel audio connector, the optional ATAPI CD-ROM
connector, and the optional S/PDIF connector on the D915GAG board
Figure 20, page 68
The signal names of the front panel audio connector
Table 24, page 70
The signal names of the optional ATAPI CD-ROM connector
Table 23, page 70
The signal names of the optional S/PDIF connector
Table 22, page 70
33
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.10.3
Intel® High Definition Audio Subsystem
The Intel High Definition Audio subsystem includes the following:
• Intel 82801FB I/O Controller Hub (ICH6)
• Realtek ALC860 audio codec
• Microphone input that supports a single dynamic, condenser, or electret microphone
The front and back audio connectors are configurable through the audio device drivers. The
available configurable audio ports are shown in Figure 10.
Back Panel
Audio Connectors
Front Panel
Audio Connectors
Mic In/
Retasking Jack E
[Port 1]
Line Out/
Retasking Jack F
[Port 2]
Line In/
Retasking Jack C
Line Out/
Retasking Jack D
Mic In/
Retasking Jack B
OM16989
Figure 10. Front/Back Panel Audio Connector Options for High Definition Audio Subsystem
Figure 11 is a block diagram of the High Definition audio subsystem.
Mic In/Retasking Jack B
Line In/Retasking Jack C
82801FB
I/O Controller
Hub
(ICH6)
Intel
High Definition
Audio Link
ALC860
Audio Codec
Line Out/Retasking Jack D
Front Panel Mic In/Retasking Jack E [Port 1]
Front Panel Line Out/Retasking Jack F [Port 2]
CD-ROM (optional)
S/PDIF (optional)
OM16990
Figure 11. High Definition Audio Subsystem Block Diagram
For information about
The back panel audio connectors
34
Refer to
Figure 18, page 64
Product Description
1.11 LAN Subsystem
NOTE
The D915GAV board provides a 10/100 Mbits/sec LAN subsystem. The D915GAG board supports
a manufacturing option for one of the following:
• Gigabit (10/100/1000 Mbits/sec) LAN subsystem
• 10/100 Mbits/sec LAN subsystem
• No LAN subsystem
The LAN subsystem consists of the following:
• Physical layer interface device. As a manufacturing option, the board includes one of the
following Platform LAN Connect (PLC) devices:
⎯ Intel® 82562EZ PLC for 10/100 Mbits/sec Ethernet LAN connectivity
⎯ Marvel Yukon 88E50 for Gigabit (10/100/1000 Mbits/sec) Ethernet LAN connectivity
(D915GAG board only)
• RJ-45 LAN connector with integrated status LEDs
Additional features of the LAN subsystem include:
• CSMA/CD protocol engine
• LAN connect interface that supports the 82562EZ
• PCI Conventional bus power management
⎯ Supports ACPI technology
⎯ Supports LAN wake capabilities
1.11.1
10/100 Mbits/sec LAN Subsystem
The 10/100 Mbits/sec LAN subsystem includes the ICH6, the Intel 82562EZ PLC, and an RJ-45
LAN connector with integrated status LEDs.
1.11.1.1
Intel® 82562EZ Physical Layer Interface Device
The Intel 82562EZ provides the following functions:
• Basic 10/100 Ethernet LAN connectivity
• Full device driver compatibility
• Programmable transit threshold
• Configuration EEPROM that contains the MAC address
35
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.11.1.2
RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector (shown in Figure 12).
Green LED
Yellow LED
OM15076
Figure 12. LAN Connector LED Locations
Table 8 describes the LED states when the board is powered up and the 10/100 Mbits/sec LAN
subsystem is operating.
Table 8.
LAN Connector LED States
LED Color
LED State
Condition
Green
Off
LAN link is not established.
On
LAN link is established.
Blinking
LAN activity is occurring.
Off
10 Mbits/sec data rate is selected
On
100 Mbits/sec data rate is selected
Yellow
1.11.2
Gigabit LAN Subsystem
The Gigabit (10/100/1000 Mbits/sec) LAN subsystem includes the Marvel Yukon 88E50 and an
RJ-45 LAN connector with integrated status LEDs.
NOTE
The Gigabit LAN subsystem is a manufacturing option available only with the D915GAG board.
1.11.2.1
Marvel Yukon 88E8050 PCI Express 1.0a Integrated MAC/PHY Gigabit
Ethernet Controller
The Marvel Yukon 88E8050 provides the following functions:
• x1 PCI Express link
• Basic 10/100/1000 Ethernet LAN connectivity
• IEEE 802.1p and 802.1q support
• 10/100/1000 IEEE 802.3 compliant
• Compliant to 802.3x flow control support
• Jumbo frame support
• TCP, IP, UDP checksum offload
• Automatic MDI/MDIX crossover
• Full device driver compatibility
• Configuration EEPROMs that contain the MAC address and ASF 2.0 support
• Wake On LAN technology power management support
• PCI Express Active State Power Management Support (L0s)
• ASF 2.0 support
36
Product Description
1.11.2.2
RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector (as shown in Figure 13). Table 9 describes the
LED states when the board is powered up and the Gigabit LAN subsystem is operating.
Green LED
Green/Yellow LED
OM16513
Figure 13. LAN Connector LED Locations
Table 9.
LED
Left
Right
1.11.3
LAN Connector LED States
Color
LED State
Condition
Off
LAN link is not established.
On
LAN link is established.
Blinking
LAN activity is occurring.
N/A
Off
10 Mbits/sec data rate is selected.
Green
On
100 Mbits/sec data rate is selected.
Yellow
On
1000 Mbits/sec data rate is selected.
Green
Alert Standard Format (ASF) Support
The boards provide the following ASF support for the onboard 10/100/1000 LAN subsystem, PCI
Express x1 bus add-in LAN cards, and PCI Conventional bus add-in LAN cards installed in PCI
Conventional bus slot 2:
• Monitoring of system firmware progress events, including:
⎯ BIOS present
⎯ Primary processor initialization
⎯ Memory initialization
⎯ Video initialization
⎯ PCI resource configuration
⎯ Hard-disk initialization
⎯ User authentication
⎯ Starting operating system boot process
• Monitoring of system firmware error events, including:
⎯ Memory missing
⎯ Memory failure
⎯ No video device
⎯ Keyboard failure
⎯ Hard-disk failure
⎯ No boot media
• Boot options to boot from different types of boot devices
• Reset, shutdown, power cycle, and power up options
37
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.11.4
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 1.4, page 19
1.12 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 hardware monitoring and fan control ASIC)
• Thermal and voltage monitoring
• Chassis intrusion detection
1.12.1
Hardware Monitoring and Fan Control ASIC
The features of the hardware monitoring and fan control ASIC include:
• Internal ambient temperature sensor
• Two remote thermal diode sensors for direct monitoring of processor temperature and ambient
temperature sensing
• Power supply monitoring of five voltages (+5 V, +12 V, +3.3 VSB, +1.5 V, and +VCCP) to
detect levels above or below acceptable values
• Thermally monitored closed-loop fan control, for all three fans, that can adjust the fan speed or
switch the fans on or off as needed
• SMBus interface
38
For information about
Refer to
The location of the fan connectors and sensors for thermal monitoring on the
D915GAV board
Figure 14, page 39
The location of the fan connectors and sensors for thermal monitoring on the
D915GAG board
Figure 15, page 40
Product Description
1.12.2
Thermal Monitoring
Figure 14 shows the location of the sensors and fan connectors for the D915GAV board.
1
3
3
1
A
4
1
1
3
C
B
D
1
3
H
G
F
E
OM16669
Item
Description
A
Thermal diode, located on processor die
B
Remote ambient temperature sensor
C
Ambient temperature sensor, internal to hardware monitoring and fan control ASIC
D
Processor fan
E
Rear chassis fan 1
F
Front chassis fan
G
ATX fan (optional)
H
Rear chassis fan 2
Figure 14. Thermal Monitoring for D915GAV Board
39
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
Figure 15 shows the location of the sensors and fan connectors for the D915GAG board.
3
1
A
4
C
1
B
D
1
3
F
E
OM16659
Item
Description
A
Thermal diode, located on processor die
B
Remote ambient temperature sensor
C
Ambient temperature sensor, internal to hardware monitoring and fan control ASIC
D
Processor fan
E
Rear chassis fan
F
Front chassis fan
Figure 15. Thermal Monitoring for D915GAG Board
40
Product Description
1.12.3
Fan Monitoring
Fan monitoring can be implemented using Intel® Desktop Utilities, LANDesk* software, or thirdparty 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 1.13.2.2, page 45
1.12.4
Chassis Intrusion and Detection
The boards 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.
1.13 Power Management
Power management is implemented at several levels, including:
• Software support through Advanced Configuration and Power Interface (ACPI)
• Hardware support:
⎯ Power connector
⎯ Fan connectors
⎯ LAN wake capabilities
⎯ Instantly Available PC technology
⎯ Resume on Ring
⎯ Wake from USB
⎯ Wake from PS/2 devices
⎯ Power Management Event signal (PME#) wake-up support
1.13.1
ACPI
ACPI gives the operating system direct control over the power management and Plug and Play
functions of a computer. The use of ACPI with these boards 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 12 on page 44)
• Support for a front panel power and sleep mode switch
41
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
Table 10 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 10.
Effects of Pressing the Power Switch
If the system is in this state…
Off
(ACPI G2/G5 – Soft off)
On
(ACPI G0 – working state)
On
(ACPI G0 – working state)
Sleep
(ACPI G1 – sleeping state)
Sleep
(ACPI G1 – sleeping state)
1.13.1.1
…and the power switch is
pressed for
Less than four seconds
Less than four seconds
More than four seconds
Less than four seconds
More than four seconds
…the system enters this state
Power-on
(ACPI G0 – working state)
Soft-off/Standby
(ACPI G1 – sleeping state)
Fail safe power-off
(ACPI G2/G5 – Soft off)
Wake-up
(ACPI G0 – working state)
Power-off
(ACPI G2/G5 – Soft off)
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.
42
Product Description
Table 11 lists the power states supported by the boards along with the associated system power
targets. See the ACPI specification for a complete description of the various system and power
states.
Table 11.
Power States and Targeted System Power
Global States
G0 – working
state
G1 – sleeping
state
Sleeping States
S0 – working
Processor
States
C0 – working
S1 – Processor
stopped
C1 – stop
grant
G1 – sleeping
state
S3 – Suspend to
RAM. Context
saved to RAM.
S4 – Suspend to
disk. Context
saved to disk.
S5 – Soft off.
Context not saved.
Cold boot is
required.
No power to the
system.
No power
G1 – sleeping
state
G2/S5
G3 –
mechanical off
AC power is
disconnected
from the
computer.
No power
No power
No power
Device States
D0 – working state.
Targeted System
Power (Note 1)
Full power > 30 W
D1, D2, D3 – device
specification
specific.
D3 – no power
except for wake-up
logic.
D3 – no power
except for wake-up
logic.
D3 – no power
except for wake-up
logic.
5 W < power < 52.5 W
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.
Power < 5 W
(Note 2)
Power < 5 W
(Note 2)
Power < 5 W
(Note 2)
Notes:
1.
Total system power is dependent on the system configuration, including add-in boards and peripherals powered
by the system chassis’ power supply.
2.
Dependent on the standby power consumption of wake-up devices used in the system.
43
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.13.1.2
Wake-up Devices and Events
Table 12 lists the devices or specific events that can wake the computer from specific states.
Table 12.
Wake-up Devices and Events
These devices/events can wake up the computer…
…from this state
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
WAKE# signal
S1, S3, S4, S5
Note:
For LAN and PME# signal, S5 is disabled by default in the BIOS Setup program. Setting this option to Power On
will enable a wake-up event from LAN in the S5 state.
NOTE
The use of these wake-up events from an ACPI state requires an operating system that provides full
ACPI support. In addition, software, drivers, and peripherals must fully support ACPI wake
events.
1.13.2
Hardware Support
CAUTION
Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities and
Instantly Available PC technology features are used. Failure to do so can damage the power
supply. The total amount of standby current required depends on the wake devices supported and
manufacturing options.
The boards 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
• WAKE# signal wake-up support
LAN wake capabilities and Instantly Available PC technology require power from the +5 V
standby line.
44
Product Description
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.
1.13.2.1
Power Connector
ATX12V-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 main power connector on the D915GAV board
Figure 19, page 66
The location of the main power connector on the D915GAG board
Figure 20, page 68
The signal names of the main power connector
Table 31, page 72
1.13.2.2
Fan Connectors
The function/operation of the fan connectors is as follows:
• The fans are on when the board is in the S0 or S1 state.
• The fans are off when the board is off or in the S3, S4, or S5 state.
• Each fan connector is wired to a fan tachometer input of the hardware monitoring and fan
control ASIC.
• All fan connectors support closed-loop fan control that can adjust the fan speed or switch the
fan on or off as needed.
• All fan connectors have a +12 V DC connection.
For information about
Refer to
The location of the fan connectors on the D915GAV board
Figure 19, page 66
The location of the fan connectors on the D915GAG board
Figure 20, page 68
The location of the fan connectors and sensors for thermal monitoring on the
D915GAV board
Figure 14, page 39
The location of the fan connectors and sensors for thermal monitoring on the
D915GAG board
Figure 15, page 40
The signal names of the processor fan connector
Table 29, page 71
The signal names of the chassis fan connectors
Table 30, page 71
45
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.13.2.3
LAN Wake Capabilities
CAUTION
For LAN wake capabilities, the +5 V standby line for the power supply must be capable of
providing adequate +5 V standby current. Failure to provide adequate standby current when
implementing LAN wake capabilities can damage the power supply.
LAN wake capabilities enable remote wake-up of the computer through a network. The LAN
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 boards support LAN wake capabilities with ACPI in
the following ways:
• The PCI Express WAKE# signal
• The PCI Conventional bus PME# signal for PCI 2.2 compliant LAN designs
• The onboard LAN subsystem
1.13.2.4
Instantly Available PC Technology
CAUTION
For Instantly Available PC technology, the +5 V standby line for the power supply must be capable
of providing adequate +5 V standby current. Failure to provide adequate standby current when
implementing Instantly Available PC technology can damage the power supply.
Instantly Available PC technology enables the boards 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 12 on page
44 lists the devices and events that can wake the computer from the S3 state.
The boards support the PCI Bus Power Management Interface Specification. 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, PCI Express add-in cards, and drivers.
1.13.2.5
Resume on Ring
The operation of Resume on Ring can be summarized as follows:
• Resumes operation from ACPI S1 or S3 states
• Detects incoming call similarly for external and internal modems
• Requires modem interrupt be unmasked for correct operation
1.13.2.6
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.
46
Product Description
1.13.2.7
Wake from PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1 or S3 state.
1.13.2.8
PME# Signal Wake-up Support
When the PME# signal on the PCI Conventional bus is asserted, the computer wakes from an ACPI
S1, S3, S4, or S5 state (with Wake on PME enabled in BIOS).
1.13.2.9
WAKE# Signal Wake-up Support
When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from an ACPI
S1, S3, S4, or S5 state.
1.13.2.10
+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 16 shows the location of the standby power indicator LED in the
D915GAV board. The LED is in the same location on the D915GAG 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.
CR3J1
OM16668
Figure 16. Location of the Standby Power Indicator LED
47
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.14 Trusted Platform Module (Optional)
The optional Trusted Platform Module (TPM) is a component on the desktop board that is
specifically designed to enhance platform security above-and-beyond the capabilities of today’s
software by providing a protected space for key operations and other security critical tasks. Using
both hardware and software, the TPM protects encryption and signature keys at their most
vulnerable stages—operations when the keys are being used unencrypted in plain-text form. The
TPM is specifically designed to shield unencrypted keys and platform authentication information
from software-based attacks.
1.14.1
•
•
•
•
•
1.14.2
System Requirements
Intel Desktop Board D915GAV or D915GAG
Microsoft Windows 2000 Professional (SP4) or Microsoft Windows XP Professional (SP1)
NTFS file system required
Microsoft Internet Explorer* 5.5 or later
Adobe* Acrobat* 5.0 or later
Warning of Potential Data Loss
CAUTION
Failure to follow the instructions below may cause you to lose data. Read and follow these
instructions prior to Trusted Platform Module initialization.
System integrators, owners, and end users must take precautions to mitigate the chance of data loss.
Data encrypted by any program utilizing the Trusted Platform Module (TPM) may become
inaccessible or unrecoverable if any of the following occurs:
• Lost Password: Loss of any of the passwords associated with the TPM will render encrypted
data inaccessible. No password recovery is available. Read the Security Precautions for
Password Procedures.
• Hard Drive Failure: In the event of a failure of a hard disk (or other storage media) that
contains encrypted data, an image of the hard disk (or other storage media) must be restored
from backup before access to encrypted data may become available. The owner/user should
backup the system hard disk on a regular basis. Read the Security Precautions below for
Hard Drive Backup Procedures.
• Platform Failure: In the event of a platform failure and/or replacement of the motherboard,
recovery procedures may allow migratable keys to be recovered and may restore access to
encrypted data. All non-migratable keys and their associated data will be lost. Both the
Infineon* Security Platform software and Wave Systems* EMBASSY* Trust Suite utilize
migratable keys. Please check any other software that accesses the TPM for migratability.
Read the Security Precautions for Emergency Recovery File Back Up Procedures.
• Loss of Trusted Platform Module Ownership: Trusted Platform Module Ownership/contents
may be cleared (via a BIOS switch) to allow for the transfer of a system to a new owner. If
TPM ownership is cleared, either intentionally or in error, recovery procedures may allow the
migratable keys to be recovered and may restore access to encrypted data. Read the Security
Precautions for Emergency Recovery File Back Up Procedures.
48
Product Description
1.14.3
Security Precautions
Security, like any other aspect of computer maintenance requires planning. What is unique about
security has to do with understanding who "friends" and adversaries are. The TPM provides
mechanisms to enable the owner/user to protect their information from adversaries. To provide this
protection the TPM effectively puts "locks" around the data. Just like physical locks, if keys or
combinations are lost, the assets (i.e., data) may be inaccessible not only to adversaries, but also to
asset owner/user.
The TPM provides two classes of keys: migratable and non-migratable. Migratable keys are
designed to protect data that can be used (i.e., unencrypted) on more than one platform. This has
the advantage of allowing the key data to be replicated (backed-up and restored) to another
platform. This may be because of user convenience (someone uses more than one platform, or the
data needs to be available to more than one person operating on different platforms). This type of
key also has the advantage in that it can be backed-up and restored from a defective platform onto a
new platform. However, migratable keys may not be the appropriate level of protection (e.g., the
user wants the data restricted to a single platform) needed for the application. This requires a nonmigratable key. Non-migratable keys carry with them a usage deficit in that while the key may be
backed-up and restored (i.e., protected from hard disk failure) they are not protected against system
or TPM failure. The very nature of a non-migratable key is that they can be used on one and only
one TPM. In the event of a system or TPM failure, all non-migratable keys and the data associated
with them will be inaccessible and unrecoverable.
CAUTION
The following precautions and procedures may assist in recovering from any of the previously
listed situations. Failure to implement these security precautions and procedures may result in
unrecoverable data loss.
1.14.3.1
Password Procedures
The Infineon Security Platform software allows users to configure passwords from 6 to
255 characters. A good password should consist of:
• At least one upper case letter (A to Z)
• At least one numerical character (0 to 9)
• At least one symbol character (!, @, &, etc.)
Example Passwords: “I wear a Brown hat 2 worK @ least once-a-month” or
“uJGFak&%)adf35a9m”
NOTE
Avoid using names or dates that can be easily guessed such as: birthdays, anniversaries, family
member names, pet names, etc.
All passwords associated with the Infineon Security Platform software (Owner, Emergency
Recovery Token, and User passwords) and the Wave Systems EMBASSY Trust Suite are NOT
RECOVERABLE and cannot be reset without the original text. The system owner should document
all passwords, store them in a secured location (vault, safe deposit box, off-site storage, etc.), and
have them available for future use. These documents should be updated after any password changes.
49
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.14.3.2
Emergency Recovery File Back Up Procedures
The Emergency Recovery Token (SPEmRecToken.xml) must be saved or moved to a removable
media (floppy, USB drive, CDR, flash media, etc). Once this is done, the removable media should
be stored in a secure location. DO NOT LEAVE ANY COPIES of the Emergency Recovery Token
on the hard drive or within any hard drive image backups. If a copy of the Emergency Recovery
Token remains on the system, it could be used to compromise the Trusted Platform Module and
platform.
After completing the Infineon Security Platform User Initialization Wizard, a copy of the
Emergency Recovery Archive (SPEmRecArchive.xml) should be copied to a removable media
and stored in a secure location. This procedure should be repeated after any password changes or
the addition of a new user.
1.14.3.3
Hard Drive Image Backup Procedures
To allow for emergency recovery from a hard drive failure, frequent images of the hard drive
should be created and stored in a secure location. In the event of a hard drive failure, the latest
image can be restored to a new hard drive and access to the encrypted data may be re-established.
NOTE
All encrypted and unencrypted data that was added after the last image was created will be lost.
1.14.3.4
Clear Text Backup (Optional)
It is recommended that system owners follow the Hard Drive Image Backup Procedures. To
backup select files without creating a drive image, files can be moved from secured programs or
drive letters to an unencrypted directory. The unencrypted (clear text) files may then be backed up
to a removable media and stored in a secure location. The advantage of the clear text backup is that
no TPM key is required to restore the data. This option is not recommended because the data is
exposed during backup and restore.
1.14.4
Trusted Platform Module Ownership
The Trusted Platform Module is disabled by default when shipped and the owner/end customer of
the system assumes “ownership” of the TPM. This permits the owner of the system to control
initialization of the TPM and create all the passwords associated with the TPM that is used to
protect their keys and data.
System builders/integrators may install both the Infineon Security Platform software and the Wave
System EMBASSY Trust Suite, but SHOULD NOT attempt to use or activate the TPM or either
software package.
50
Product Description
1.14.5
Enabling the Trusted Platform Module
The Trusted Platform Module is disabled by default when shipped to insure that the owner/end
customer of the system initializes the TPM and configures all security passwords. The owner/end
customer should use the following steps to enable the TPM.
1. While the PC is displaying the splash screen (or POST screen), press the <F2> key to enter
BIOS.
2. Use the arrow keys to go to the Advanced Menu, select Peripheral Configuration, and then
press the <Enter> key.
3. Select the Trusted Platform Module, press <Enter>, and select Enabled and press <Enter> again
(display should show: Trusted Platform Module [Enabled]).
4. Press the <F10> key, select Ok and press <Enter>.
5. System should reboot and start Microsoft Windows.
1.14.6
Assuming Trusted Platform Module Ownership
Once the TPM has been enabled, ownership must be assumed by using the Infineon Security
Platform Software. The owner/end user should follow the steps listed below to take ownership of
the TPM:
1. Start the system.
2. Launch the Infineon Security Platform Initialization Wizard.
3. Create Owner password (before creating any password, review the Password Recommendations
made earlier in this document).
4. Create a new Recovery Archive (note the file name and location).
5. Specify a Security Platform Emergency Recovery Token password and location. (this password
should not match the Owner password or any other password).
6. Define where to save the Emergency Recovery Token (note the file location and name).
7. The software will then create recovery archive files and finalize ownership of the TPM.
8. After completing the Infineon Security Platform Initialization Wizard, the Emergency
Recovery Token (SPEmRecToken.xml) must be moved to a removable media (floppy, CDR,
flash media, etc) if the file was not saved to a removable media during installation. Once this is
done, the removable media should be stored in a secure location. No copies of this Emergency
Recovery Token file should remain on the system. If a copy remains on the system, it could be
used to compromise the security of the platform.
9. Launch the Infineon Security Platform User Initialization Wizard.
10. Create a Basic User password (this password is the most frequently used and should not match
any other password).
11. Select and configure Security Platform features for this user.
12. After completing the Infineon Security Platform User Initialization Wizard, a copy of the
Emergency Recovery Archive (SPEmRecArchive.xml) should be copied to a removable
media and stored in a secure location. This procedure should be repeated after any password
changes or the addition of new users.
13. Restart the system.
14. To backup the keys for the EMBASSY Trust Suite, the Key Transfer Manager software must
be configured. Launch the Key Transfer Manager from the program menu.
51
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
15. Follow the instructions and create and document the locations for both the archive and
restoration key files. The key archive should be located on a removable media and stored in a
secure location when not in use.
16. Create and document the password to protect the key archive.
17. Provide the TPM Owner password to allow the Key Transfer Manager to create the archive and
restoration key files.
18. Upon completing the configuration of the Key Transfer Manager, it will place an icon in the
task bar and automatically back up all new and updated keys associated with the EMBASSY
Trust Suite. If the removable media that contains the archive file is not present when a new key
is generated, then keys will have to be manually backed up using the Key Transfer Manager
when the removable media is available.
19. All passwords associated with the Infineon Security Platform Software (Owner, Emergency
Recovery Token, and User passwords) and Wave Systems EMBASSY Trust Suite and Key
Transfer Manager are not recoverable and cannot be reset without the original text. These
passwords should be documented and stored in a secured location (vault, safe deposit box, offsite storage, etc.) in case they are needed in the future. These documents and files should be
updated after any password changes.
1.14.7
1.14.7.1
Recovery Procedures
Recovering from Hard Disk Failure
Restore the latest hard drive image from backup to the new hard drive – no TPM specific recovery
is necessary.
1.14.7.2
Recovering from Desktop Board or TPM Failure
This procedure may restore the migratable keys from the Emergency Recovery Archive, and does
not restore any previous keys or content to the TPM. This recovery procedure may restore access
to the Infineon Security Platform software and Wave Systems EMBASSY Trust Suite that are
secured with migratable keys.
Requirements:
• Emergency Recovery Archive (created with the Infineon Security Platform Initiation Wizard)
• Emergency Recovery Token (created with the Infineon Security Platform Initiation Wizard)
• Emergency Recovery Token Security Password (created with the Infineon Security Platform
Initiation Wizard)
• Working original operating system (OS) installation, or a restored image of the hard drive
• Wave Systems Key Transfer Manager archive password
• TPM Ownership password
This recovery procedure only restores the migratable keys from the previously created Recovery
Archives.
1. Replace the desktop board with the same model as the failed board.
2. Start the original operating system or restore the original hard drive image.
3. Start the Infineon Security Platform Initialization Wizard and check the “I want to restore the
existing Security Platform” box.
52
Product Description
4. Follow the instructions during the Security Platform Initialization, and append the Emergency
Recovery Archive to the existing archive.
5. Provide all the necessary passwords, files, and file locations as requested. It may take up to 20
minutes for Security Platform Initialization Wizard to restore the security platform settings.
6. Start User Initialization Wizard. Select “Recover Your Basic User Key” when prompted.
Specify the original Basic User Key password and proceed with the wizard.
7. When re-configuring the Personal Secure Drive, select “I want to change my Personal Secure
Drive setting”, confirm the drive letter and name are correct, and then proceed through the rest
of the wizard.
8. Restart the system when requested.
9. To restore access to the EMBASSY Trust Suite, right mouse click on the Key Transfer
Manager icon located in the taskbar in the lower right corner of the screen, and select Restore
TPM Keys.
10. Provide all the necessary passwords, files, and file locations as requested by the Key Transfer
Manager.
11. Upon successful completion of all steps, you should be able to access previously encrypted
files.
1.14.8
Clearing Trusted Platform Module Ownership
WARNING
Disconnect the desktop board's power supply from its AC power source before you connect or
disconnect cables, or install or remove any board components. Failure to do this can result in
personal injury or equipment damage. Some circuitry on the desktop board can continue to
operate even though the front panel power switch is off.
CAUTION
DATA ENCRYPTED BY ANY PROGRAM UTILIZING THE TPM WILL BECOME
INACCESSIBLE IF TPM OWNERSHIP IS CLEARED. Recovery procedures may allow the
migratable keys to be recovered and might restore access to encrypted data. (Review the Recovery
Procedures for detailed instructions).
The TPM may be cleared to transfer ownership of the platform to a new owner.
1. Observe precautions in the above WARNING then open the system case.
2. Move the configuration jumper on the board to pins 2-3.
3. Restore power to the PC and power on.
4. System should automatically enter BIOS setup.
5. Use the arrow keys to select Clear Trusted Platform Module, press <Enter>.
6. If you agree to the warning message select Ok and press <Enter>.
7. Press the <F10> key to save and exit, select Ok and press <Enter>.
8. Power off the system.
9. Review precautions in the WARNING above.
10. Restore the configuration jumper on the board to pins 1-2.
When cleared, the TPM module is disabled by default.
53
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
1.14.9
•
For assistance with the Infineon Security Platform Software, visit the web at:
•
http://www.infineon.com
For assistance with the Wave System EMBASSY Trust Suite, visit the web at:
•
54
Software Support
http://www.wave.com/support/ets.html
For additional information about TPM and enhancing PC security, visit:
https://www.trustedcomputinggroup.org/home
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 .................................................................................................................. 55
Memory Resources ...................................................................................................... 55
DMA Channels ............................................................................................................. 57
Fixed I/O Map............................................................................................................... 58
PCI Configuration Space Map...................................................................................... 59
Interrupts ...................................................................................................................... 60
PCI Conventional Interrupt Routing Map ..................................................................... 61
Connectors................................................................................................................... 63
Jumper Block ............................................................................................................... 77
Mechanical Considerations .......................................................................................... 78
Electrical Considerations.............................................................................................. 81
Thermal Considerations ............................................................................................... 83
Reliability...................................................................................................................... 85
Environmental .............................................................................................................. 86
Regulatory Compliance................................................................................................ 87
2.1 Introduction
Sections 2.2 - 2.6 contain several standalone tables. Table 13 describes the system memory map,
Table 14 lists the DMA channels, Table 15 shows the I/O map, Table 16 defines the PCI
Conventional bus configuration space map, and Table 17 describes the interrupts. The remaining
sections in this chapter are introduced by text found with their respective section headings.
2.2 Memory Resources
2.2.1
Addressable Memory
The board utilizes 4 GB of addressable system memory. Typically the address space that is
allocated for PCI Conventional bus add-in cards, PCI Express configuration space, BIOS (firmware
hub), and chipset overhead resides above the top of DRAM (total system memory). On a system
that has 4 GB of system memory installed, it is not possible to use all of the installed memory due
to system address space being allocated for other system critical functions. These functions include
the following:
• BIOS/firmware hub (2 MB)
• Local APIC (19 MB)
• Digital Media Interface (40 MB)
• Front side bus interrupts (17 MB)
• PCI Express configuration space (256 MB)
55
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
•
•
MCH base address registers, internal graphics ranges, PCI Express ports (up to 512 MB)
Memory-mapped I/O that is dynamically allocated for PCI Conventional and PCI Express addin cards
The amount of installed memory that can be used will vary based on add-in cards and BIOS
settings. Figure 17 shows a schematic of the system memory map. All installed system memory
can be used when there is no overlap of system addresses.
4 GB
Top of System Address Space
FLASH
APIC
~20 MB
Reserved
PCI Memory Range contains PCI, chipsets,
Direct Media Interface
(DMI), and ICH ranges
(approximately 750 MB)
0FFFFFH
0F0000H
0EFFFFH
Top of usable
DRAM (memory
visible to the
operating
system)
0E0000H
0DFFFFH
0C0000H
0BFFFFH
DRAM
Range
1 MB
DOS
Compatibility
Memory
640 KB
0A0000H
09FFFFH
0 MB
00000H
1 MB
Upper BIOS
area (64 KB)
960 KB
Lower BIOS
area
(64 KB;
16 KB x 4)
Add-in Card
BIOS and
Buffer area
(128 KB;
16 KB x 8)
Standard PCI/
ISA Video
Memory (SMM
Memory)
128 KB
896 KB
768 KB
640 KB
DOS area
(640 KB)
0 KB
OM17140
Figure 17. Detailed System Memory Address Map
56
Technical Reference
2.2.2
Memory Map
Table 13 lists the system memory map.
Table 13.
System Memory Map
Address Range (decimal)
Address Range (hex)
Size
Description
1024 K - 4194304 K
100000 - FFFFFFFF
4095 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
Potential available high DOS
memory (open to the PCI
Conventional bus). Dependent on
video adapter used.
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
2.3 DMA Channels
Table 14.
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
57
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.4 Fixed I/O Map
Table 15.
I/O Map
Address (hex)
Size
Description
0000 - 00FF
256 bytes
0170 - 0177
01F0 - 01F7
8 bytes
8 bytes
Used by the Desktop Board D915GAV/D915GAG. Refer to
the ICH6 data sheet for dynamic addressing information.
Secondary Parallel ATA IDE channel command block
Primary Parallel ATA IDE channel command block
0228 - 022F (Note 1)
0278 - 027F (Note 1)
02E8 - 02EF (Note 1)
02F8 - 02FF (Note 1)
0374 - 0377
0377, bits 6:0
0378 - 037F
03E8 - 03EF
03F0 - 03F5
03F4 – 03F7
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
4 bytes
7 bits
8 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 Parallel ATA IDE channel control block
Secondary IDE channel status port
LPT1
COM3
Diskette channel
Primary Parallel ATA IDE channel control block
COM1
Edge/level triggered PIC
ECP port, LPTn base address + 400h
PCI Conventional bus configuration address register
Reset control register
PCI Conventional bus configuration data register
Primary Parallel ATA IDE bus master registers
Secondary Parallel ATA IDE bus master 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 ICH6 address aliassing. The ICH6 data
sheet provides more information on address aliassing.
58
For information about
Refer to
Obtaining the ICH6 data sheet
Section 1.4, page 19
Technical Reference
2.5 PCI Configuration Space Map
Table 16.
PCI Configuration Space Map
Bus
Number (hex)
Device
Number (hex)
Function
Number (hex)
Description
00
00
00
Memory controller of Intel 82915G component
00
01
00
PCI Express x16 graphics port (Note 1)
00
02
00
Integrated graphics controller
00
02
01
Integrated graphics controller
00
1B
00
Intel High Definition Audio Controller
00
1C
00
PCI Express port 1 (PCI Express x1 bus connector 1)
00
1C
01
PCI Express port 2 (Gigabit LAN controller, if present)
00
1C
02
PCI Express port 3 (PCI Express x1 bus connector 2)
(Note 2)
00
1C
03
PCI Express port 4 (not used)
00
1D
00
USB UHCI controller 1
00
1D
01
USB UHCI controller 2
00
1D
02
USB UHCI controller 3
00
1D
03
USB UHCI controller 4
00
1D
07
EHCI controller
00
1E
00
PCI bridge
00
1F
00
PCI controller
00
1F
01
Parallel ATA IDE controller
00
1F
02
Serial ATA controller
00
1F
03
SMBus controller
(Note 3)
00
00
PCI Conventional bus connector 1
(Note 3)
01
00
PCI Conventional bus connector 2
(Note 3)
02
00
PCI Conventional bus connector 3 (Note 2)
(Note 3)
03
00
PCI Conventional bus connector 4 (Note 2)
(Note 3)
08
00
Intel 82562EZ 10/100 Mbits/sec LAN PLC (if present)
Notes:
1.
Present only when a PCI Express x16 graphics card is installed.
2.
Not present on the D915GAG board.
3.
Bus number is dynamic and can change based on add-in cards used.
59
Intel Desktop Board D915GAV/D915GAG 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 ICH6 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 17.
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
User available
10
User available
11
User available
12
Onboard mouse port (if present, else user available)
13
Reserved, math coprocessor
14
Primary IDE/Serial ATA (if present, else user available)
15
Secondary IDE/Serial ATA (if present, else user available)
16 (Note 2)
User available (through PIRQA)
(Note 2)
User available (through PIRQB)
18 (Note 2)
User available (through PIRQC)
19
(Note 2)
User available (through PIRQD)
20
(Note 2)
User available (through PIRQE)
21 (Note 2)
User available (through PIRQF)
22
(Note 2)
User available (through PIRQG)
23
(Note 2)
User available (through PIRQH)
17
Notes:
60
1.
Default, but can be changed to another IRQ.
2.
Available in APIC mode only.
Technical Reference
2.7 PCI Conventional Interrupt Routing Map
This section describes interrupt sharing and how the interrupt signals are connected between the
PCI Conventional bus connectors and onboard PCI Conventional devices. The PCI Conventional
specification describes how interrupts can be shared between devices attached to the PCI
Conventional 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 Conventional device should not share an interrupt with
other PCI Conventional devices. Use the following information to avoid sharing an interrupt with a
PCI Conventional add-in card.
PCI Conventional 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 ICH6 has eight Programmable Interrupt Request (PIRQ) input signals. All PCI Conventional
interrupt sources either onboard or from a PCI Conventional add-in card connect to one of these
PIRQ signals. Some PCI Conventional interrupt sources are electrically tied together on the board
and therefore share the same interrupt. Table 18 shows an example of how the PIRQ signals are
routed.
For example, using Table 18 as a reference, assume an add-in card using INTA is plugged into PCI
Conventional bus connector 3. In PCI bus connector 3, INTA is connected to PIRQB, which is
already connected to the ICH6 audio controller. The add-in card in PCI Conventional bus
connector 3 now shares an interrupt with the onboard interrupt source.
61
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
Table 18.
PCI Interrupt Routing Map
ICH6 PIRQ Signal Name
PCI Interrupt Source
PIRQA
PIRQB
PIRQC
PIRQD
PIRQE
PIRQF
PIRQG
PIRQH
ICH6 LAN
INTA
PCI bus connector 1
INTD
INTA
INTB
INTC
PCI bus connector 2
INTC
INTB
INTA
INTD
INTC
INTD
PCI bus connector 3
(Note)
PCI bus connector 4
(Note)
INTD
INTC
INTA
INTB
INTB
INTA
Note: Not present on the D915GAG board.
NOTE
In PIC mode, the ICH6 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 17 for the allocation of PIRQ
lines to IRQ signals in APIC mode.
PCI interrupt assignments to the USB ports, Serial ATA ports, and PCI Express ports are dynamic.
62
Technical Reference
2.8 Connectors
CAUTION
Only the following connectors have overcurrent protection: back panel USB, front panel USB, and
PS/2.
The other 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 power cable, and the external devices themselves.
This section describes the board’s connectors. The connectors can be divided into these groups:
• Back panel I/O connectors (see page 64)
• Component-side I/O connectors (see page 65)
63
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.8.1
Back Panel Connectors
Figure 18 shows the location of the back panel connectors. The back panel connectors are
color-coded. The figure legend (Table 19) lists the colors used (when applicable).
C
F
K
I
A
B
D
E
G
H J
L
OM16670
Figure 18. Back Panel Connectors
Table 19 lists the back panel connectors identified in Figure 18.
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.
64
Technical Reference
Table 19.
Back Panel Connectors Shown in Figure 18
Item/callout
from Figure 18
Description
A
PS/2 mouse port (Green)
B
PS/2 keyboard port (Purple)
C
Parallel port (Burgundy)
D
Serial port A (Teal)
E
VGA port
F
Audio line in/Retasking Port C (Light blue)
G
Audio line out/Retasking Port D (Lime Green)
H
Mic in/Retasking Port B (Pink)
I
IEEE-1394a (optional)
J
USB ports (two)
K
LAN
L
USB ports (two)
NOTE
The D915GAG board supports a manufacturing option for no LAN subsystem. On D915GAG
boards with no LAN subsystem, the back panel LAN connector is not present.
65
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.8.2
Component-side Connectors
Figure 19 shows the locations of the component-side connectors on the D915GAV board.
B
A
D
C
1
F H
J
L
G I
K
M
E
N
P
O
3
1
2
9
10
1
3
4
4
3
4
1 3
1
1
1
2
1
1
1
1
1
10
1
3
2
9
1
1
10
1
2
2
10
3
1
1
4
1
1
2
10
1
2
9
1
24
2
1
2
23
40 2
1
34
1
33
39 1
GG EE CC AA
Y
W
FF DD BB Z
X
V
U
T S R Q
OM16671
Figure 19. D915GAV Board Component-side Connectors
66
Technical Reference
Table 20 lists the component-side connectors identified in Figure 19.
Table 20.
Component-side Connectors Shown in Figure 19
Item/callout
from Figure 19
Description
A
PCI Conventional bus add-in card connector 4
B
Rear chassis fan connector 2
C
PCI Conventional bus add-in card connector 3
D
PCI Express x1 bus add-in card connector 2
E
ATAPI CD-ROM connector (optional)
F
PCI Express x1 bus add-in card connector 1
G
S/PDIF connector (optional)
H
Front panel audio connector
I
PCI Conventional bus add-in card connector 2
J
Front panel IEEE-1394a connector (optional)
K
PCI Conventional bus add-in card connector 1
L
Front panel IEEE-1394a connector (optional)
M
PCI Express x16 bus add-in card connector
N
Rear chassis fan connector 1
O
Alternate power connector
P
+12V power connector (ATX12V)
Q
SCSI LED (optional)
R
Serial port B (optional)
S
Processor fan connector
T
Power connector
U
Diskette drive connector
V
Parallel ATA IDE connector
W
Chassis intrusion connector
X
Front chassis fan connector
Y
Serial ATA connector 1
Z
Serial ATA connector 3
AA
Serial ATA connector 2
BB
Serial ATA connector 0
CC
Auxiliary front panel power LED connector
DD
Front panel connector
EE
ATX fan connector (optional)
FF
Front panel USB connector
GG
Front panel USB connector
67
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
Figure 20 shows the locations of the component-side connectors on the D915GAG board.
B
D
A
G
C
1
2
9
10
E
H
1
3
4
4
3
4
BB
I
F
1 3
1
1
1
AA
2
1
1
1
1
1
10
9
2
1
1
10
1
2
2
3
1
1
10
4
Z
Y
J
1
1
2
10
1
9
2
K
1
X
24
W
2
23
40 2
2
1
L
1
34
1
33
39 1
V
T
U
R
S
P
O
N
M
Q
OM16661
Figure 20. D915GAG Board Component-side Connectors
68
Technical Reference
Table 21 lists the component-side connectors identified in Figure 20.
Table 21.
Component-side Connectors Shown in Figure 20
Item/callout
from Figure 20
Description
A
S/PDIF connector (optional)
B
Front panel audio connector
C
PCI Conventional bus add-in card connector 2
D
Front panel IEEE-1394a connector (optional)
E
PCI Conventional bus add-in card connector 1
F
PCI Express x16 bus add-in card connector
G
Rear chassis fan connector
H
Alternate power connector
I
+12V power connector (ATX12V)
J
Processor fan connector
K
Serial port B (optional)
L
SCSI LED (optional)
M
Power connector
N
Diskette drive connector
O
Parallel ATA IDE connector
P
Chassis intrusion connector
Q
Front chassis fan connector
R
Serial ATA connector 1
S
Serial ATA connector 3
T
Serial ATA connector 2
U
Serial ATA connector 0
V
Auxiliary front panel power LED connector
W
Front panel connector
X
Front panel USB connector
Y
Front panel USB connector
Z
Front panel IEEE-1394a connector (optional)
AA
PCI Express x1 bus add-in card connector 1
BB
ATAPI CD-ROM connector (optional)
69
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
Table 22.
Pin
Signal Name
1
+5 V
2
S/PDIF Output
3
Ground
Table 23.
Pin
ATAPI CD-ROM Connector (Optional)
Signal Name
1
Left audio input from CD-ROM
2
CD audio differential ground
3
CD audio differential ground
4
Right audio input from CD-ROM
Table 24.
#
S/PDIF Connector (Optional)
Front Panel Audio Connector
Pin
Signal Name
Pin
Signal Name
1
Port E [Port 1] Left Channel
2
Ground
3
Port E [Port 1] Right Channel
4
Presence# (dongle present)
5
Port F [Port 2] Right Channel
6
Port E [Port 1] Sense return
(jack detection)
7
Port E [Port 1] and Port F [Port 2]
Sense send (jack detection)
8
Key
9
Port F [Port 2] Left Channel
10
Port F [Port 2] Sense return
(jack detection)
INTEGRATOR’S NOTE
The front panel audio connector is colored yellow.
Table 25.
Pin
Signal Name
1
DCD
2
RXD
3
TXD
4
DTR
5
Ground
6
DSR
7
RTS
8
CTS
9
RI
10
Not connected
Table 26.
70
Serial Port B Connector (optional)
Chassis Intrusion Connector
Pin
Signal Name
1
Intruder
2
Ground
Pin
Signal Name
Technical Reference
Table 27.
SCSI Hard Drive Activity LED
Connector (Optional)
Pin
Signal Name
1
SCSI_ACT#
2
No connect
Table 28.
Serial ATA Connectors
Pin
Signal Name
1
Ground
2
TXP
3
TXN
4
Ground
5
RXN
6
RXP
7
Ground
Table 29.
Processor Fan Connector
Pin
Signal Name
1
Ground
2
+12 V
3
FAN_TACH
4
FAN_CONTROL
2.8.2.1
Chassis Fan Connectors
The D915GAV board has three standard and one optional chassis fan connectors:
• Front chassis fan
• Rear chassis fan 1
• Rear chassis fan 2
• ATX fan connector (optional)
The D915GAG board has two chassis fan connectors:
• Front chassis fan
• Rear chassis fan
Table 30 lists the signal names for the chassis fan connectors. These signal names apply to all
chassis fan connectors for both boards.
Table 30.
Pin
Chassis Fan Connectors
Signal Name
1
Control
2
+12 V
3
Tach
71
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.8.2.2
Power Supply Connectors
The board has three power supply connectors:
• Main power – a 2 x 12 connector. This connector is compatible with 2 x 10 connectors
previously used on Intel Desktop boards. The board supports the use of ATX12V power
supplies with either 2 x 10 or 2 x 12 main power cables. When using a power supply with a
2 x 10 main power cable, attach that cable on the rightmost pins of the main power connector,
leaving pins 11, 12, 23, and 24 unconnected.
• ATX12V power – a 2 x 2 connector. This connector provides power directly to the processor
voltage regulator and must always be used. Failure to do so will prevent the board from
booting.
• Alternate power – a 1 x 4 connector. This connector provides additional power when using
high wattage PCI Express x16 graphics cards.
#
INTEGRATOR’S NOTE
When using high wattage PCI Express x16 graphics cards, use one of the following power supply
configurations to avoid system instability:
• The preferred method of power delivery is to use a power supply with a 2 x 12 main power
cable. In this configuration, use two connectors to provide power to the board:
⎯ The main power connector
⎯ The ATX12V connector
•
In this configuration, the alternate power connector is not required. The 2 x 12 main power
cable can provide up to 144 W of power from the +12 V rail.
An alternate method of power delivery is to use a power supply has a 2 x 10 main power cable.
In this configuration, use three connectors to provide power to the board:
⎯ The main power connector
⎯ The ATX12V connector
⎯ The alternate power connector
Table 31.
Pin
Main Power Connector
Signal Name
Pin
1
+3.3 V
13
+3.3 V
2
+3.3 V
14
-12 V
3
Ground
15
Ground
4
+5 V
16
PS-ON# (power supply remote on/off)
5
Ground
17
Ground
6
+5 V
18
Ground
7
Ground
19
Ground
8
PWRGD (Power Good)
20
No connect
9
+5 V (Standby)
21
+5 V
10
+12 V
11
+12 V
12
2 x 12 connector detect
(Note)
(Note)
22
+5 V
23
+5 V
24
Ground
Note: When using a 2 x 10 power supply cable, this pin will be unconnected.
72
Signal Name
(Note)
(Note)
Technical Reference
Table 32.
ATX12V Power Connector
Pin
Signal Name
Pin
Signal Name
1
Ground
2
Ground
3
+12 V
4
+12 V
Table 33.
Alternate Power Connector
Pin
Signal Name
1
+12 V
2
Ground
3
Ground
4
+5 V
2.8.2.3
Add-in Card Connectors
The board has the following add-in card connectors:
• PCI Express x16: one connector supporting simultaneous transfer speeds up to 8 GBytes/sec.
• PCI Express x1: the D915GAV board has two PCI Express x1 connectors; the D915GAG
board has one PCI Express x1 connector. The x1 interfaces support simultaneous transfer
speeds up to 500 MBytes/sec.
• PCI Conventional (rev 2.2 compliant) bus: the D915GAV board has four PCI Conventional
bus add-in card connectors; the D915GAG board has two PCI Conventional add-in card
connectors. The SMBus is routed to PCI Conventional bus connector 2 only (ATX expansion
slot 6). PCI Conventional bus add-in cards with SMBus support can access sensor data and
other information residing on the Desktop Board.
Note the following considerations for the PCI Conventional bus connectors:
• All of the PCI Conventional bus connectors are bus master capable.
• SMBus signals are routed to PCI Conventional bus connector 2. This enables PCI
Conventional bus add-in boards with SMBus support to access sensor data on the boards. 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.
NOTE
The PCI Express x16 connector is configured to support only a PCI Express x1 link when the
Intel GMA900 graphics controller is enabled.
73
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.8.2.4
Auxiliary Front Panel Power/Sleep LED Connector
Pins 1 and 3 of this connector duplicate the signals on pins 2 and 4 of the front panel connector.
Table 34.
Auxiliary Front Panel Power/Sleep LED Connector
Pin
Signal Name
In/Out
Description
1
HDR_BLNK_GRN
Out
Front panel green LED
2
Not connected
3
HDR_BLNK_YEL
Out
Front panel yellow LED
2.8.2.5
Front Panel Connector
This section describes the functions of the front panel connector. Table 35 lists the signal names of
the front panel connector. Figure 21 is a connection diagram for the front panel connector.
Table 35.
Pin
Front Panel Connector
Signal
In/Out
Description
Pin
Signal
In/Out
Hard Drive Activity LED
[Yellow]
Description
Power LED
[Green]
1
HD_PWR
Out
Hard disk LED pull-up
(750 Ω) to +5 V
2
HDR_BLNK_
GRN
Out
Front panel green
LED
3
HAD#
Out
Hard disk active LED
4
HDR_BLNK_
YEL
Out
Front panel yellow
LED
Reset Switch
[Purple]
5
Ground
7
FP_RESET#
In
On/Off Switch
[Red]
Ground
6
FPBUT_IN
Reset switch
8
Ground
Not Connected
Power
10
N/C
Dual-colored
Power LED
Single-colored
Power LED
+
−
−
+
Not connected
+5 V DC
8
7
6
5
4
3
2
1
Purple
Red
9
Green
Power
Switch
N/C
Yellow
+5 V
Power switch
Ground
Power
9
In
Reset
Switch
−
+
Hard Drive
Activity LED
OM17000
Figure 21. Connection Diagram for Front Panel Connector
74
Technical Reference
2.8.2.5.1
Hard Drive Activity LED Connector [Yellow]
Pins 1 and 3 [Yellow] can be connected to an LED to provide a visual indicator that data is being
read from or written to a hard drive. Proper LED function requires one of the following:
• A Serial ATA hard drive connected to an onboard Serial ATA connector
• An IDE hard drive connected to an onboard IDE connector
2.8.2.5.2
Reset Switch Connector [Purple]
Pins 5 and 7 [Purple] can be connected to a momentary single pole, single throw (SPST) type
switch that is normally open. When the switch is closed, the board resets and runs the POST.
2.8.2.5.3
Power/Sleep LED Connector [Green]
Pins 2 and 4 [Green] can be connected to a one- or two-color LED. Table 36 shows the possible
states for a one-color LED. Table 37 shows the possible states for a two-color LED.
Table 36.
States for a One-Color Power LED
LED State
Description
Off
Power off/sleeping
Steady Green
Running
Table 37.
States for a Two-Color Power LED
LED State
Description
Off
Power off
Steady Green
Running
Steady Yellow
Sleeping
NOTE
The colors listed in Table 36 and Table 37 are suggested colors only. Actual LED colors are
product- or customer-specific.
2.8.2.5.4
Power Switch Connector [Red]
Pins 6 and 8 [Red] 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.
75
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.8.2.6
Front Panel USB Connectors
Figure 22 is a connection diagram for the front panel USB connectors.
#
INTEGRATOR’S NOTES
•
•
•
•
The +5 V DC power on the USB connector is fused.
Pins 1, 3, 5, and 7 comprise one USB port.
Pins 2, 4, 6, and 8 comprise one USB port.
Use only a front panel USB connector that conforms to the USB 2.0 specification for highspeed USB devices.
One
USB
Port
Power
(+5 V DC)
1
2
Power
(+5 V DC)
D−
3
4
D−
D+
5
6
D+
Ground
7
8
Ground
10
No Connect
Key (no pin)
One
USB
Port
OM15963
Figure 22. Connection Diagram for Front Panel USB Connectors
2.8.2.7
Front Panel IEEE 1394a Connectors (Optional)
Figure 23 is a connection diagram for the optional IEEE 1394a connectors.
TPA+
1
2
TPA−
Ground
3
4
Ground
TPB+
5
6
TPB−
7
8
+12 V DC
10
Ground
+12 V DC
Key (no pin)
OM16107
Figure 23. Connection Diagram for IEEE 1394a Connectors
#
76
INTEGRATOR’S NOTES
•
•
•
The IEEE 1394a connectors are colored blue.
The +12 V DC power on the IEEE 1394a connectors is fused.
Each IEEE 1394a connector provides one IEEE 1394a port.
Technical Reference
2.9 Jumper Block
CAUTION
Do not move the jumper with the power on. Always turn off the power and unplug the power cord
from the computer before changing a jumper setting. Otherwise, the board could be damaged.
Figure 24 shows the location of the jumper block on the D915GAV board. (The jumper is in the
same location on the D915GAG board.) The jumper block determines the BIOS Setup program’s
mode. Table 38 describes the jumper settings for the three modes: normal, configure, and recovery.
When the jumper is set to configure 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.
1
3
J8J4
OM16672
Figure 24. Location of the Jumper Block
Table 38.
BIOS Setup Configuration Jumper Settings
Function/Mode
Jumper Setting
Configuration
1-2
1
3
The BIOS uses current configuration information and
passwords for booting.
2-3
1
3
After the POST runs, Setup runs automatically. The
maintenance menu is displayed.
None
1
3
The BIOS attempts to recover the BIOS configuration. A
recovery diskette is required.
Normal
Configure
Recovery
77
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.10 Mechanical Considerations
2.10.1
D915GAV Board Form Factor
The D915GAV board is designed to fit into an ATX-form-factor chassis. Figure 25 illustrates the
mechanical form factor of the board. Dimensions are given in inches [millimeters]. The outer
dimensions are 12.00 inches by 9.60 inches [304.80 millimeters by 243.84 millimeters]. Location
of the I/O connectors and mounting holes are in compliance with the ATX specification.
1.800
[45.72]
6.500
[165.10]
6.100
[154.94]
5.200
[132.08]
0.00
2.850
[72.39]
3.100
[78.74]
5.550
[140.97]
4.900
[124.46]
2.600
[66.04]
0.00
6.200
[157.48]
6.450
[163.83]
OM16674
Figure 25. D915GAV Board Dimensions
78
Technical Reference
2.10.2
D915GAG Board Form Factor
The D915GAG board is designed to fit into either a microATX or an ATX-form-factor chassis.
Figure 26 illustrates the mechanical form factor of the board. Dimensions are given in inches
[millimeters]. The outer dimensions are 9.60 inches by 9.60 inches [243.84 millimeters by
243.84 millimeters]. Location of the I/O connectors and mounting holes are in compliance with the
ATX specification.
1.800
[45.72]
6.500
[165.10]
6.100
[154.94]
5.200
[132.08]
0.00
2.850
[72.39]
3.100
[78.74]
3.150
[80.01]
2.600
[66.04]
0.00
6.200
[157.48]
6.450
[163.83]
OM16664
Figure 26. D915GAG Board Dimensions
79
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.10.3
I/O Shield
The back panel I/O shield for the boards must meet specific dimension and material requirements.
Systems based on these boards need the back panel I/O shield to pass certification testing.
Figure 27 shows the I/O shield. Dimensions are given in inches to a tolerance of ±0.02 inches.
The figure also indicates the position of each cutout. Additional design considerations for I/O
shields relative to chassis requirements are described in the ATX specification.
NOTE
The I/O shield drawing in this document is for reference only. An I/O shield compliant with the
ATX chassis specification 2.03 is available from Intel.
162.3 REF
[6.390]
1.6 ± 0.12
[0.063 ± 0.005]
20. ± 0.254 TYP
[0.787 ± 0.10]
159.2 ± 0.12
[6.268 ± 0.005]
1.55 REF
[0.061]
22.45
[0.884]
7.012
[0.276]
Ø 1.00
[0.039]
8x R 0.5 MIN
A
A
0.00
[0.00]
11.81
[0.465]
11.811
[0.465]
14.4
[0.567]
142.12
[5.595]
120.81
[4.756]
102.84
[4.049]
57.206
[2.252]
21.13
[0.832]
27.876
[1.097]
0.00
[0.00]
9.44
[0.372]
12.00
[0.472]
Pictorial
View
OM17166
Figure 27. I/O Shield Dimensions
80
Technical Reference
2.11 Electrical Considerations
2.11.1
DC Loading
Table 39 lists the DC loading characteristics of the boards. This data is based on a DC analysis of
all active components within the board that impact its power delivery subsystems. The analysis
does not include PCI add-in cards. Minimum values assume a light load placed on the board that is
similar to an environment with no applications running and no USB current draw. Maximum
values assume a load placed on the board that is similar to a heavy gaming environment with a
500 mA current draw per USB port. These calculations are not based on specific processor values
or memory configurations but are based on the minimum and maximum current draw possible from
the board’s power delivery subsystems to the processor, memory, and USB ports.
Use the datasheets for add-in cards, such as PCI, to determine the overall system power
requirements. The selection of a power supply at the system level is dependent on the system’s
usage model and not necessarily tied to a particular processor speed.
Table 39.
DC Loading Characteristics
DC Current at:
Mode
DC Power
+3.3 V
+5 V
+12 V
-12 V
+5 VSB
Minimum loading
200.00 W
3.30 A
10.00 A
900 A
0.03 A
0.80 A
Maximum loading
300.00 W
6.00 A
14.00 A
16.00 A
0.10 A
1.40 A
2.11.2
Add-in Board Considerations
The boards are designed to provide 2 A (average) of +5 V current for each add-in board. The total
+5 V current draw for both boards is as follows:
• A fully loaded D915GAV board (all six expansion slots and the PCI Express x16 slot filled)
must not exceed 14 A.
• A fully loaded D915GAG board (all three expansion slots and the PCI Express x16 slot filled)
must not exceed 8 A.
81
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.11.3
Fan Connector Current Capability
CAUTION
The processor fan must be connected to the processor fan connector, not to a chassis fan
connector. Connecting the processor fan to a chassis fan connector may result in onboard
component damage that will halt fan operation.
Table 40 lists the current capability of the fan connectors.
Table 40.
Fan Connector Current Capability
Fan Connector
Maximum Available Current
Processor fan
1000 mA
Front chassis fan
600 mA
Rear chassis fan
600 mA
Rear chassis fan 2
600 mA
NOTE
The rear chassis fan 2 is available only on the D915GAV board. It is not available on the
D915GAG board.
2.11.4
Power Supply Considerations
CAUTION
The +5 V standby line for the power supply must be capable of providing adequate +5 V standby
current. Failure to do so can damage the power supply. The total amount of standby current
required depends on the wake devices supported and manufacturing options.
System integrators should refer to the power usage values listed in Table 39 when selecting a power
supply for use with the board.
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)
82
Technical Reference
2.12 Thermal Considerations
CAUTION
o
A chassis with a maximum internal ambient temperature of 38 C at the processor fan inlet is a
requirement. Use a processor heatsink that provides omni-directional airflow (as shown in
Figure 28) to maintain required airflow across the processor voltage regulator area.
OM16996
Figure 28. Processor Heatsink for Omni-directional Airflow
CAUTION
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 board. For a list of chassis that have
been tested with Intel desktop boards please refer to the following website:
http://developer.intel.com/design/motherbd/cooling.htm
All responsibility for determining the adequacy of any thermal or system design remains solely with
the reader. Intel makes no warranties or representations that merely following the instructions
presented in this document will result in a system with adequate thermal performance.
CAUTION
Ensure that the ambient temperature does not exceed the 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.
83
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
CAUTION
Ensure that proper airflow is maintained in the processor voltage regulator circuit. Failure to do
so may result in damage to the voltage regulator circuit. The processor voltage regulator area
o
(item A in Figure 29) can reach a temperature of up to 85 C in an open chassis.
Figure 29 shows the locations of the localized high temperature zones.
A
B
D
C
OM16673
Item
Description
A
B
C
D
Processor voltage regulator area
Processor
Intel 82915G GMCH
Intel 82801FB ICH6
Figure 29. Localized High Temperature Zones
84
Technical Reference
Table 41 provides maximum case temperatures for the 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 board.
Table 41.
Thermal Considerations for Components
Component
Maximum Case Temperature
Intel Pentium 4 processor
For processor case temperature, see processor datasheets and
processor specification updates
Intel 82915G GMCH
99 oC (under bias)
Intel 82801FB ICH6
110 oC (under bias)
For information about
Intel Pentium 4 processor datasheets and specification updates
Refer to
Section 1.4, page 19
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 for the D915GAV and
D915GAG boards is 102,038 hours.
85
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.14 Environmental
Table 42 lists the environmental specifications for the board.
Table 42.
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
5 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
86
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 43 lists the safety regulations the Desktop Boards D915GAV and D915GAG comply with
when correctly installed in a compatible host system.
Table 43.
Safety Regulations
Regulation
Title
UL 60950-1:2003/
Information Technology Equipment - Safety - Part 1: General
Requirements (USA and Canada)
CSA C22.2 No. 60950-1-03
EN 60950-1:2002
Information Technology Equipment - Safety - Part 1: General
Requirements (European Union)
IEC 60950-1:2001, First Edition
Information Technology Equipment - Safety - Part 1: General
Requirements (International)
2.15.2
EMC Regulations
Table 44 lists the EMC regulations the Desktop Boards D915GAV and D915GAG comply with
when correctly installed in a compatible host system.
Table 44.
EMC Regulations
Regulation
Title
FCC (Class B)
Title 47 of the Code of Federal Regulations, Parts 2 and 15, Subpart B,
Radio Frequency Devices. (USA)
ICES-003 (Class B)
Interference-Causing Equipment Standard, Digital Apparatus. (Canada)
EN55022: 1998 (Class B)
Limits and methods of measurement of Radio Interference
Characteristics of Information Technology Equipment.
(European Union)
EN55024: 1998
Information Technology Equipment – Immunity Characteristics Limits
and methods of measurement. (European Union)
AS/NZS 3548 (Class B)
Australian Communications Authority, Standard for Electromagnetic
Compatibility. (Australia and New Zealand)
CISPR 22, 3rd Edition (Class B)
Limits and methods of measurement of Radio Disturbance
Characteristics of Information Technology Equipment. (International)
CISPR 24: 1997
Information Technology Equipment – Immunity Characteristics – Limits
and Methods of Measurements. (International)
VCCI (Class B)
Voluntary Control for Interference by Information Technology Equipment
(Japan)
87
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.15.2.1
FCC Compliance Statement (USA)
Product Type: D915GAV Desktop Board and D915GAG Desktop Board
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment to a different electrical branch circuit from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications to the equipment not expressly approved by Intel Corporation could
void the user’s authority to operate the equipment.
2.15.2.2
Canadian Compliance Statement
This Class B digital apparatus complies with Canadian ICES-003.
Cet appereil numérique de la classe B est conforme à la norme NMB-003 du Canada.
2.15.3
European Union Declaration of Conformity Statement
We, Intel Corporation, declare under our sole responsibility that the product: Intel Desktop Boards
D915GAV and D915GAG are in conformity with all applicable essential requirements necessary
for CE marking, following the provisions of the European Council Directive 89/336/EEC (EMC
Directive) and Council Directive 73/23/EEC (Safety/Low Voltage Directive).
The product is properly CE marked demonstrating this conformity and is for distribution within all
member states of the EU with no restrictions.
This product follows the provisions of the European Directives 89/336/EEC and 73/23/EEC.
Dansk Dette produkt er i overensstemmelse med det europæiske direktiv 89/336/EEC &
73/23/EEC.
Dutch Dit product is in navolging van de bepalingen van Europees Directief 89/336/EEC &
73/23/EEC.
88
Technical Reference
Suomi Tämä tuote noudattaa EU-direktiivin 89/336/EEC & 73/23/EEC määräyksiä.
Français Ce produit est conforme aux exigences de la Directive Européenne 89/336/EEC &
73/23/EEC.
Deutsch Dieses Produkt entspricht den Bestimmungen der Europäischen Richtlinie 89/336/EEC &
73/23/EEC.
Icelandic Þessi vara stenst reglugerð Evrópska Efnahags Bandalagsins númer 89/336/ EEC &
73/23/EEC.
Italiano Questo prodotto è conforme alla Direttiva Europea 89/336/EEC & 73/23/EEC.
Norsk Dette produktet er i henhold til bestemmelsene i det europeiske direktivet 89/336/ EEC &
73/23/EEC.
Portuguese Este produto cumpre com as normas da Diretiva Européia 89/336/EEC &
73/23/EEC.
Español Este producto cumple con las normas del Directivo Europeo 89/336/EEC & 73/23/EEC.
Svenska Denna produkt har tillverkats i enlighet med EG-direktiv 89/336/EEC & 73/23/EEC.
2.15.4
Product Ecology Statements
The following information is provided to address worldwide product ecology concerns and
regulations.
2.15.4.1
Disposal Considerations
This product contains the following materials that may be regulated upon disposal: lead solder on
the printed wiring board assembly.
2.15.4.2
Recycling Considerations
Intel encourages its customers to recycle its products and their components (e.g., batteries, circuit
boards, plastic enclosures, etc.) whenever possible. In the U.S., a list of recyclers in your area can
be found at:
http://www.eiae.org/
In the absence of a viable recycling option, products and their components must be disposed of in
accordance with all applicable local environmental regulations.
89
Intel Desktop Board D915GAV/D915GAG Technical Product Specification
2.15.5
Product Certification Markings (Board Level)
Table 45 lists the board’s product certification markings.
Table 45.
Product Certification Markings
Description
Marking
UL joint US/Canada Recognized Component mark. Includes adjacent
UL file number for Intel Desktop Boards: E210882 (component side).
FCC Declaration of Conformity logo mark for Class B equipment;
includes Intel name and D915GAV or D915GAG model designation
(component side).
CE mark. Declares compliance to European Union (EU) EMC directive
(89/336/EEC) and Low Voltage directive (73/23/EEC) (component side).
The CE mark should also be on the shipping container.
Australian Communications Authority (ACA) C-Tick mark. Includes
adjacent Intel supplier code number, N-232. The C-tick mark should
also be on the shipping container.
Printed wiring board manufacturer’s recognition mark: consists of a
unique UL recognized manufacturer’s logo, along with a flammability
rating (solder side).
90
V-0 or 94V-0
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
Introduction .................................................................................................................. 91
BIOS Flash Memory Organization ............................................................................... 92
Resource Configuration ............................................................................................... 92
System Management BIOS (SMBIOS) ........................................................................ 93
Legacy USB Support.................................................................................................... 93
BIOS Updates .............................................................................................................. 94
Boot Options ................................................................................................................ 95
Fast Booting Systems with Intel® Rapid BIOS Boot..................................................... 96
BIOS Security Features ............................................................................................... 97
3.1 Introduction
The boards 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 autoconfiguration utility, and Plug and Play support.
The BIOS displays a message during POST identifying the type of BIOS and a revision code. The
initial production BIOSs are identified as EV91510A.86A.
When the BIOS Setup configuration jumper is set to configure mode and the computer is poweredup, the BIOS compares the CPU version and the microcode version in the BIOS and reports if the
two match.
The BIOS Setup program can be used to view and change the BIOS settings for the computer. The
BIOS Setup program is accessed by pressing the <F2> key after the Power-On Self-Test (POST)
memory test begins and before the operating system boot begins. The menu bar is shown below.
Maintenance Main
Advanced
Security
Power
Boot
Exit
NOTE
The maintenance menu is displayed only when the Desktop Board is in configure mode. Section 2.9
on page 77 shows how to put the Desktop Board in configure mode.
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Intel Desktop Board D915GAV/D915GAG Technical Product Specification
Table 46 lists the BIOS Setup program menu features.
Table 46.
BIOS Setup Program Menu Bar
Maintenance
Main
Advanced
Security
Power
Boot
Clears
passwords and
displays
processor
information
Displays
processor
and memory
configuration
Configures
advanced
features
available
through the
chipset
Sets
passwords
and security
features
Selects boot
Configures
options
power
management
features and
power supply
controls
Exit
Saves or
discards
changes to
Setup
program
options
Table 47 lists the function keys available for menu screens.
Table 47.
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
3.2 BIOS Flash Memory Organization
The Firmware Hub (FWH) includes a 4 Mbit (512 KB) symmetrical flash memory device.
3.3 Resource Configuration
3.3.1
PCI Autoconfiguration
The BIOS can automatically configure PCI devices. PCI devices may be onboard or add-in cards.
Autoconfiguration lets a user insert or remove PCI cards without having to configure the system.
When a user turns on the system after adding a PCI card, the BIOS automatically configures
interrupts, the I/O space, and other system resources. Any interrupts set to Available in Setup are
considered to be available for use by the add-in card.
3.3.2
PCI IDE Support
If you select Auto in the BIOS Setup program, the BIOS automatically sets up the
PCI IDE connector 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. 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
92
Overview of BIOS Features
to PIO Mode 3 or 4, depending on the capability of the drive. You can override the autoconfiguration 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
Do not connect an ATA device as a slave on the same IDE cable as an ATAPI master device. For
example, do not connect an ATA hard drive as a slave to an ATAPI CD-ROM drive.
3.4 System Management BIOS (SMBIOS)
SMBIOS is a Desktop Management Interface (DMI) compliant method for managing computers in
a managed network.
The main component of SMBIOS is the Management Information Format (MIF) database, which
contains information about the computing system and its components. Using SMBIOS, a system
administrator can obtain the system types, capabilities, operational status, and installation dates for
system components. The MIF database defines the data and provides the method for accessing this
information. The BIOS enables applications such as third-party management software to use
SMBIOS. The BIOS stores and reports the following SMBIOS information:
• BIOS data, such as the BIOS revision level
• Fixed-system data, such as peripherals, serial numbers, and asset tags
• Resource data, such as memory size, cache size, and processor speed
• Dynamic data, such as event detection and error logging
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.
3.5 Legacy USB Support
Legacy USB support enables USB devices 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.
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Intel Desktop Board D915GAV/D915GAG Technical Product Specification
5. The operating system loads. While the operating system is loading, USB keyboards and mice
are recognized and may be used to configure the operating system. (Keyboards and mice are
not recognized during this period if Legacy USB support was set to Disabled in the BIOS Setup
program.)
6. After the operating system loads the USB drivers, all legacy and non-legacy USB devices are
recognized by the operating system, and Legacy USB support from the BIOS is no longer used.
To install an operating system that supports USB, verify that Legacy USB support in the BIOS
Setup program is set to Enabled and follow the operating system’s installation instructions.
3.6 BIOS Updates
The BIOS can be updated using either of the following utilities, which are available on the Intel
World Wide Web site:
• Intel® 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 verify that the updated BIOS matches the target system to prevent accidentally
installing an incompatible BIOS.
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 1.4, page 19
3.6.1
Language Support
The BIOS Setup program and help messages are supported in US English. Additional languages
are available in the Integrator’s Toolkit utility. Check the Intel website for details.
3.6.2
Custom Splash Screen
During POST, an Intel® splash screen is displayed by default. This splash screen can be augmented
with a custom splash screen. The Integrator’s Toolkit that is available from Intel can be used to
create a custom splash screen.
NOTE
If you add a custom splash screen, it will share space with the Intel branded logo.
94
For information about
Refer to
The Intel World Wide Web site
Section 1.4, page 19
Overview of BIOS Features
3.7 Boot Options
In the BIOS Setup program, the user can choose to boot from a diskette drive, hard drives,
CD-ROM, or the network. The default setting is for the diskette drive to be the first boot device,
the hard drive second, and the ATAPI CD-ROM third. The fourth device is disabled.
3.7.1
CD-ROM Boot
Booting from CD-ROM is supported in compliance to the El Torito bootable CD-ROM format
specification. Under the Boot menu in the BIOS Setup program, ATAPI CD-ROM is listed as a
boot device. Boot devices are defined in priority order. Accordingly, if there is not a bootable CD
in the CD-ROM drive, the system will attempt to boot from the next defined drive.
3.7.2
Network Boot
The network can be selected as a boot device. This selection allows booting from the onboard LAN
or a network add-in card with a remote boot ROM installed.
Pressing the <F12> key during POST automatically forces booting from the LAN. To use this key
during POST, the User Access Level in the BIOS Setup program's Security menu must be
set to Full.
3.7.3
Booting Without Attached Devices
For use in embedded applications, the BIOS has been designed so that after passing the POST, the
operating system loader is invoked even if the following devices are not present:
• Video adapter
• Keyboard
• Mouse
3.7.4
Changing the Default Boot Device During POST
Pressing the <F10> key during POST causes a boot device menu to be displayed. This menu
displays the list of available boot devices (as set in the BIOS setup program’s Boot Device Priority
Submenu). Table 48 lists the boot device menu options.
Table 48.
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
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Intel Desktop Board D915GAV/D915GAG Technical Product Specification
3.8 Fast Booting Systems with Intel® Rapid BIOS Boot
These factors affect system boot speed:
• Selecting and configuring peripherals properly
• Using an optimized BIOS, such as the Intel® Rapid BIOS
3.8.1
Peripheral Selection and Configuration
The following techniques help improve system boot speed:
• Choose a hard drive with parameters such as “power-up to data ready” less than eight seconds,
that minimize hard drive startup delays.
• Select a CD-ROM drive with a fast initialization rate. This rate can influence POST
execution time.
• Eliminate unnecessary add-in adapter features, such as logo displays, screen repaints, or mode
changes in POST. These features may add time to the boot process.
• Try different monitors. Some monitors initialize and communicate with the BIOS more
quickly, which enables the system to boot more quickly.
3.8.2
Intel Rapid BIOS Boot
Use of the following BIOS Setup program settings reduces the POST execution time.
In the Boot Menu:
• Set the hard disk drive as the first boot device. As a result, the POST does not first seek a
diskette drive, which saves about one second from the POST execution time.
• Disable Quiet Boot, which eliminates display of the logo splash screen. This could save several
seconds of painting complex graphic images and changing video modes.
• Enable 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 Drive Configuration Submenu
of the BIOS Setup program).
96
Overview of BIOS Features
3.9 BIOS Security Features
The BIOS includes security features that restrict access to the BIOS Setup program and who can
boot the computer. A supervisor password and a user password can be set for the BIOS Setup
program and for booting the computer, with the following restrictions:
• The supervisor password gives unrestricted access to view and change all the Setup options in
the BIOS Setup program. This is the supervisor mode.
• The user password gives restricted access to view and change Setup options in the BIOS Setup
program. This is the user mode.
• If only the supervisor password is set, pressing the <Enter> key at the password prompt of the
BIOS Setup program allows the user restricted access to Setup.
• If both the supervisor and user passwords are set, users can enter either the supervisor password
or the user password to access Setup. Users have access to Setup respective to which password
is entered.
• Setting the user password restricts who can boot the computer. The password prompt will be
displayed before the computer is booted. If only the supervisor password is set, the computer
boots without asking for a password. If both passwords are set, the user can enter either
password to boot the computer.
• For enhanced security, use different passwords for the supervisor and user passwords.
• Valid password characters are A-Z, a-z, and 0-9. Passwords may be up to 16 characters in
length.
Table 49 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 49.
Supervisor and User Password Functions
Supervisor
Password Set Mode
User 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:
Supervisor Password
Supervisor Password
Enter Password
If no password is set, any user can change all Setup options.
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Intel Desktop Board D915GAV/D915GAG Technical Product Specification
98
4 Error Messages and Beep Codes
What This Chapter Contains
4.1
4.2
4.3
4.4
4.5
BIOS Error Messages .................................................................................................. 99
Port 80h POST Codes ............................................................................................... 101
Bus Initialization Checkpoints .................................................................................... 105
Speaker...................................................................................................................... 106
BIOS Beep Codes...................................................................................................... 106
4.1 BIOS Error Messages
Table 50 lists the error messages and provides a brief description of each.
Table 50.
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
Could not read sector from corresponding drive.
Pri Master Drive - ATAPI Incompatible
Pri 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.
Checking NVRAM.....
NVRAM is being checked to see if it is valid.
continued
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Intel Desktop Board D915GAV/D915GAG Technical Product Specification
Table 50.
BIOS Error Messages (continued)
Error Message
Explanation
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
100
CMOS is ignored and NVRAM is cleared. User must enter Setup.
Error Messages and Beep Codes
4.2 Port 80h POST Codes
During the POST, the BIOS generates diagnostic progress codes (POST-codes) to I/O port 80h. If
the POST fails, execution stops and the last POST code generated is left at port 80h. This code is
useful for determining the point where an error occurred.
Displaying the POST-codes requires a PCI bus add-in card, often called a POST card. The POST
card can decode the port and display the contents on a medium such as a seven-segment display.
NOTE
The POST card must be installed in PCI bus connector 1.
The tables below offer descriptions of the POST codes generated by the BIOS. Table 51 defines
the uncompressed INIT code checkpoints, Table 52 describes the boot block recovery code
checkpoints, and Table 53 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 51.
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 52.
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 D915GAV/D915GAG Technical Product Specification
Table 53.
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 4.3 for details
of different buses.)
2B
To give control for any setup required before optional video ROM check.
2C
To look for optional video ROM and give control.
2D
To give control to do any processing after video ROM returns control.
2E
If EGA/VGA not found then do display memory R/W test.
2F
EGA/VGA not found. Display memory R/W test about to begin.
30
Display memory R/W test passed. About to look for the retrace checking.
31
Display memory R/W test or retrace checking failed. To do alternate Display memory R/W test.
32
Alternate Display memory R/W test passed. To look for the alternate display retrace checking.
34
Video display checking over. Display mode to be set next.
37
Display mode set. Going to display the power-on message.
38
Different buses init (input, IPL, general devices) to start if present. (See Section 4.3 for details of
different buses.)
39
Display different buses initialization error messages. (See Section 4.3 for details of different
buses.)
3A
New cursor position read and saved. To display the Hit <DEL> message.
continued
102
Error Messages and Beep Codes
Table 53.
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 D915GAV/D915GAG Technical Product Specification
Table 53.
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 4.3 for details of different
buses.)
96
Going to do any init before C800 optional ROM control.
97
Any init before C800 optional ROM control is over. Optional ROM check and control will be
done next.
98
Optional ROM control is done. About 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
104
Error Messages and Beep Codes
Table 53.
Runtime Code Uncompressed in F000 Shadow RAM (continued)
Code
Description of POST Operation
AE
Uncompress SMBIOS module and init SMBIOS code and form the runtime SMBIOS image in
shadow.
B1
Going to copy any code to specific area.
00
Copying of code to specific area done. Going to give control to INT-19 boot loader.
4.3 Bus Initialization Checkpoints
The system BIOS gives control to the different buses at several checkpoints to do various tasks.
Table 54 describes the bus initialization checkpoints.
Table 54.
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 55 describes the upper nibble of the high byte and indicates the function that
is being executed.
Table 55.
Upper Nibble High Byte Functions
Value
Description
0
func#0, disable all devices on the bus concerned.
1
func#1, static devices init on the bus concerned.
2
func#2, output device init on the bus concerned.
3
func#3, input device init on the bus concerned.
4
func#4, IPL device init on the bus concerned.
5
func#5, general device init on the bus concerned.
6
func#6, error reporting for the bus concerned.
7
func#7, add-on ROM init for all buses.
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Intel Desktop Board D915GAV/D915GAG Technical Product Specification
Table 56 describes the lower nibble of the high byte and indicates the bus on which the routines are
being executed.
Table 56.
Lower Nibble High Byte Functions
Value
Description
0
Generic DIM (Device Initialization Manager)
1
On-board System devices
2
ISA devices
3
EISA devices
4
ISA PnP devices
5
PCI devices
4.4 Speaker
A 47 Ω inductive speaker is mounted on the board. The speaker provides audible error code (beep
code) information during POST.
For information about
Refer to
The location of the onboard speaker
Figure 1, on page 14
4.5 BIOS Beep Codes
Whenever a recoverable error occurs during POST, the BIOS displays an error message describing
the problem (see Table 57). 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). If POST
completes normally, the BIOS issues one short beep before passing control to the operating system.
Table 57.
106
Beep Codes
Beep
Description
1
CPU error
3
Memory error
6
System failure
7
System failure
8
Video error