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Intel® Desktop Board
D955XBK
Technical Product Specification
April 2005
Order Number: D14065-001
The Intel® Desktop Board D955XBK 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 D955XBK Specification Update.
Revision History
Revision
-001
Revision History
First release of the
Specification
Date
Intel®
Desktop Board D955XBK Technical Product
April 2005
This product specification applies to only the standard Intel® Desktop Board D955XBK with BIOS
identifier BK95510J.86A.
Changes to this specification will be published in the Intel Desktop Board D955XBK 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
PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY, RELATING TO SALE AND/OR USE OF INTEL® PRODUCTS INCLUDING LIABILITY OR WARRANTIES
RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT,
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MEDICAL, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS.
All Intel desktop boards are evaluated as Information Technology Equipment (I.T.E.) for use in personal computers (PC) for
installation in homes, offices, schools, computer rooms, and similar locations. The suitability of this product for other PC or
embedded non-PC applications or other environments, such as medical, industrial, alarm systems, test equipment, etc. may
not be supported without further evaluation by Intel.
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rights that relate to the presented subject matter. The furnishing of documents and other materials and information does not
provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other
intellectual property rights.
Intel 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
Denver, CO 80217-9808
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Intel, Pentium, and Celeron are registered trademarks of Intel Corporation or its subsidiaries in the United States and other
countries.
* Other names and brands may be claimed as the property of others.
Copyright © 2005, Intel Corporation. All rights reserved.
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
power and environmental requirements, and the BIOS for the Intel® Desktop Board D955XBK. It
describes the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Intel Desktop Board
D955XBK and its components to the vendors, system integrators, and other engineers and
technicians who need this level of information. It is specifically not intended for general audiences.
What This Document Contains
Chapter
1
2
3
4
Description
A description of the hardware used on the Desktop Board D955XBK
A map of the resources of the Desktop Board
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.
WARNING
Warnings indicate conditions, which if not observed, can cause personal injury.
iii
Intel Desktop Board D955XBK Technical Product Specification
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 Board D955XBK, 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
Gbits/sec
Gigabits 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)
Mbits/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
1.15
Overview ...................................................................................................................... 10
1.1.1
Feature Summary.......................................................................................... 10
1.1.2
Manufacturing Options .................................................................................. 11
1.1.3
Board Layout ................................................................................................. 12
1.1.4
Block Diagram ............................................................................................... 14
Online Support ............................................................................................................. 15
Processor ..................................................................................................................... 15
System Memory ........................................................................................................... 16
1.4.1
Memory Configurations ................................................................................. 17
Intel® 955X Chipset...................................................................................................... 21
1.5.1
USB ............................................................................................................... 21
1.5.2
IDE Support ................................................................................................... 21
1.5.3
Real-Time Clock, CMOS SRAM, and Battery................................................ 23
Discrete Serial ATA Interface (Optional) ...................................................................... 24
PCI Express Connectors.............................................................................................. 24
Auxiliary Power (AUX PWR) Output Connector (Optional) .......................................... 25
IEEE-1394a/b Connectors (Optional)........................................................................... 25
I/O Controller................................................................................................................ 26
1.10.1 Serial Port...................................................................................................... 26
1.10.2 Parallel Port ................................................................................................... 26
1.10.3 Diskette Drive Controller................................................................................ 26
1.10.4 Keyboard and Mouse Interface ..................................................................... 26
Audio Subsystem ......................................................................................................... 27
1.11.1 Audio Subsystem Software ........................................................................... 27
1.11.2 Audio Connectors .......................................................................................... 27
1.11.3 8-Channel (7.1) Audio Subsystem................................................................. 28
1.11.4 6-Channel (5.1) Audio Subsystem................................................................. 30
LAN Subsystem ........................................................................................................... 31
1.12.1 Intel® 82573E/82573V/82574V Gigabit Ethernet Controller .......................... 31
1.12.2 RJ-45 LAN Connector with Integrated LEDs ................................................. 31
1.12.3 Alert Standard Format (ASF) Support ........................................................... 32
1.12.4 Intel® Active Management Technology (AMT) (Optional).............................. 32
1.12.5 LAN Subsystem Software.............................................................................. 34
Hardware Management Subsystem............................................................................. 34
1.13.1 Hardware Monitoring and Fan Control ASIC ................................................. 34
1.13.2 Thermal Monitoring........................................................................................ 35
1.13.3 Fan Monitoring............................................................................................... 36
1.13.4 Chassis Intrusion and Detection.................................................................... 36
Power Management ..................................................................................................... 36
1.14.1 ACPI .............................................................................................................. 36
1.14.2 Hardware Support ......................................................................................... 39
Trusted Platform Module (Optional) ............................................................................. 43
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Intel Desktop Board D955XBK Technical Product Specification
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
Memory Resources ...................................................................................................... 45
2.1.1
Addressable Memory..................................................................................... 45
2.1.2
Memory Map.................................................................................................. 47
DMA Channels ............................................................................................................. 47
Fixed I/O Map............................................................................................................... 48
PCI Configuration Space Map...................................................................................... 49
Interrupts ...................................................................................................................... 50
PCI Conventional Interrupt Routing Map ..................................................................... 51
Connectors................................................................................................................... 53
2.7.1
Back Panel Connectors ................................................................................. 53
2.7.2
Component-side Connectors......................................................................... 56
Jumper Block ............................................................................................................... 67
Mechanical Considerations .......................................................................................... 68
2.9.1
Form Factor ................................................................................................... 68
2.9.2
I/O Shield....................................................................................................... 69
Electrical Considerations.............................................................................................. 71
2.10.1 DC Loading.................................................................................................... 71
2.10.2 Add-in Board Considerations......................................................................... 71
2.10.3 Fan Connector Current Capability ................................................................. 72
2.10.4 Power Supply Considerations ....................................................................... 72
Thermal Considerations ............................................................................................... 73
Reliability...................................................................................................................... 75
Environmental .............................................................................................................. 76
Regulatory Compliance................................................................................................ 77
2.14.1 Safety Regulations ........................................................................................ 77
2.14.2 EMC Regulations........................................................................................... 77
2.14.3 European Union Declaration of Conformity Statement.................................. 78
2.14.4 Recycling Considerations .............................................................................. 79
2.14.5 Product Certification Markings (Board Level) ................................................ 80
3 Overview of BIOS Features
3.1
3.2
3.3
3.4
3.5
3.6
vi
Introduction .................................................................................................................. 81
Resource Configuration ............................................................................................... 82
3.2.1
PCI Autoconfiguration.................................................................................... 82
3.2.2
PCI IDE Support ............................................................................................ 82
System Management BIOS (SMBIOS) ........................................................................ 83
Legacy USB Support.................................................................................................... 83
BIOS Updates .............................................................................................................. 84
3.5.1
Language Support ......................................................................................... 84
3.5.2
Custom Splash Screen.................................................................................. 84
Boot Options ................................................................................................................ 85
3.6.1
CD-ROM Boot ............................................................................................... 85
3.6.2
Network Boot ................................................................................................. 85
3.6.3
Booting Without Attached Devices ................................................................ 85
3.6.4
Changing the Default Boot Device During POST .......................................... 85
Contents
3.7
3.8
Fast Booting Systems with Intel® Rapid BIOS Boot..................................................... 86
3.7.1
Peripheral Selection and Configuration ......................................................... 86
3.7.2
Intel Rapid BIOS Boot ................................................................................... 86
BIOS Security Features ............................................................................................... 87
4 Error Messages and Beep Codes
4.1
4.2
4.3
4.4
Speaker ....................................................................................................................... 89
BIOS Beep Codes........................................................................................................ 89
BIOS Error Messages .................................................................................................. 89
Port 80h POST Codes ................................................................................................. 90
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.
27.
28.
Desktop Board Components ........................................................................................ 12
Block Diagram.............................................................................................................. 14
Memory Channel and DIMM Configuration .................................................................. 17
Dual Channel (Interleaved) Mode Configuration with Two DIMMs .............................. 18
Dual Channel (Interleaved) Mode Configuration with Three DIMMs............................ 18
Dual Channel (Interleaved) Mode Configuration with Four DIMMs.............................. 19
Single Channel (Asymmetric) Mode Configuration with One DIMM............................. 20
Single Channel (Asymmetric) Mode Configuration with Three DIMMs ........................ 20
Front/Back Panel Audio Connector Options for 8-Channel (7.1) Audio Subsystem .... 28
8-channel (7.1) Audio Subsystem Block Diagram........................................................ 29
Front/Back Panel Audio Connector Options for 6-Channel (5.1) Audio Subsystem .... 30
6-Channel (5.1) Audio Subsystem Block Diagram....................................................... 30
LAN Connector LED Locations .................................................................................... 31
Sensors and Fan Connectors ...................................................................................... 35
Location of the Standby Power Indicator LED ............................................................. 42
Detailed System Memory Address Map ....................................................................... 46
Back Panel Connectors for 8-Channel (7.1) Audio Subsystem ................................... 54
Back Panel Connectors for 6-Channel (5.1) Audio Subsystem ................................... 55
D955XBK Component-side Connectors....................................................................... 56
Connection Diagram for Front Panel Connector .......................................................... 63
Connection Diagram for Front Panel USB Connectors................................................ 65
Connection Diagram for Front Panel IEEE 1394a/b Connectors ................................. 66
Location of the Jumper Block....................................................................................... 67
Board Dimensions........................................................................................................ 68
I/O Shield Dimensions for Boards with the 8-Channel (7.1) Audio Subsystem............ 69
I/O Shield Dimensions for Boards with the 6-Channel (5.1) Audio Subsystem............ 70
Example of a Processor Heatsink for Omni-directional Airflow.................................... 73
Localized High Temperature Zones ............................................................................. 74
Tables
1.
2.
3.
4.
Feature Summary ........................................................................................................ 10
Manufacturing Options ................................................................................................. 11
Components Shown in Figure 1................................................................................... 13
Supported Memory Configurations .............................................................................. 16
vii
Intel Desktop Board D955XBK Technical Product Specification
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.
43.
44.
45.
46.
47.
48.
49.
50.
viii
LAN Connector LED States ......................................................................................... 31
Effects of Pressing the Power Switch .......................................................................... 37
Power States and Targeted System Power ................................................................. 38
Wake-up Devices and Events ...................................................................................... 39
System Memory Map ................................................................................................... 47
DMA Channels ............................................................................................................. 47
I/O Map ........................................................................................................................ 48
PCI Configuration Space Map...................................................................................... 49
Interrupts ...................................................................................................................... 50
PCI Interrupt Routing Map ........................................................................................... 52
Back Panel Connectors Shown in Figure 17................................................................ 54
Back Panel Connectors Shown in Figure 18................................................................ 55
Component-side Connectors Shown in Figure 19 ....................................................... 57
ATAPI CD-ROM Connector (Optional)......................................................................... 58
Front Panel Audio Connector....................................................................................... 58
Front Chassis Fan and Rear Chassis Fan Connectors............................................... 58
Processor Fan Connector and Auxiliary Rear Fan Connector .................................... 58
Chassis Intrusion Connector ........................................................................................ 59
SCSI Hard Drive Activity LED Connector (Optional) .................................................... 59
Serial ATA Connectors................................................................................................. 59
Auxiliary Power Output Connector ............................................................................... 59
Main Power Connector................................................................................................. 61
Processor Power Connector (2 x 4 Pin)....................................................................... 61
Processor Power Connector (2 x 2 Pin)....................................................................... 61
Alternate Power Connector .......................................................................................... 61
Auxiliary Front Panel Power/Sleep LED Connector ..................................................... 62
Front Panel Connector ................................................................................................. 63
States for a One-Color Power LED .............................................................................. 64
States for a Two-Color Power LED .............................................................................. 64
BIOS Setup Configuration Jumper Settings................................................................. 67
DC Loading Characteristics ......................................................................................... 71
Fan Connector Current Capability................................................................................ 72
Thermal Considerations for Components .................................................................... 75
Environmental Specifications ....................................................................................... 76
Safety Regulations ....................................................................................................... 77
EMC Regulations ......................................................................................................... 77
Product Certification Markings ..................................................................................... 80
BIOS Setup Program Menu Bar................................................................................... 82
BIOS Setup Program Function Keys............................................................................ 82
Boot Device Menu Options .......................................................................................... 85
Supervisor and User Password Functions ................................................................... 87
Beep Codes ................................................................................................................. 89
BIOS Error Messages .................................................................................................. 89
Port 80h POST Code Ranges...................................................................................... 90
Port 80h POST Codes ................................................................................................. 91
Typical Port 80h POST Sequence ............................................................................... 94
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
1.15
Overview ...................................................................................................................... 10
Online Support ............................................................................................................. 15
Processor ..................................................................................................................... 15
System Memory ........................................................................................................... 16
Intel® 955X Chipset...................................................................................................... 21
Discrete Serial ATA Interface (Optional) ...................................................................... 24
PCI Express Connectors.............................................................................................. 24
Auxiliary Power (AUX PWR) Output Connector (Optional) .......................................... 25
IEEE-1394a/b Connectors (Optional)........................................................................... 25
I/O Controller................................................................................................................ 26
Audio Subsystem ......................................................................................................... 27
LAN Subsystem ........................................................................................................... 31
Hardware Management Subsystem............................................................................. 34
Power Management ..................................................................................................... 36
Trusted Platform Module (Optional) ............................................................................. 43
9
Intel Desktop Board D955XBK Technical Product Specification
1.1 Overview
1.1.1
Feature Summary
Table 1 summarizes the major features of the board.
Table 1.
Feature Summary
Form Factor
ATX (12.00 inches by 9.60 inches [304.80 millimeters by 243.84 millimeters])
Processor
Support for an Intel® Pentium® 4 processor in an LGA775 socket with a 1066 or
800 MHz system bus
Memory
• Four 240-pin DDR2 SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for 667 and 533 MHz DDR2 DIMMs
• Support for up to 8 GB of system memory
• Support for ECC and non-ECC memory
Chipset
Intel® 955X Chipset, consisting of:
• Intel® 82955X Memory Controller Hub (MCH)
• Intel® 82801GR I/O Controller Hub (ICH7-R)
• Firmware Hub (FWH) or Serial Peripheral Interface (SPI) Flash device
Video
One PCI Express* x16 connector supporting PCI Express x16 graphics cards
Audio
Intel® High Definition Audio subsystem
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 with RAID support
• One Parallel ATA IDE interface with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2* keyboard and mouse ports
BIOS
• Intel® BIOS (resident in the FWH or SPI Flash device)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
SMBIOS, and Intel® Active Management Technology (AMT)
Instantly Available
PC Technology
• Support for PCI Local Bus Specification Revision 2.2
• Support for PCI Express Revision 1.0a
• Suspend to RAM support
• Wake on PCI, RS-232, front panel, PS/2 devices, and USB ports
LAN Support
Gigabit (10/100/1000 Mbits/sec) LAN subsystem using the
Intel® 82573E/82573V/82574V Gigabit Ethernet Controller
Expansion
Capabilities
• Three PCI Conventional bus add-in card connectors (SMBus routed to PCI
Conventional bus connector 2)
• One PCI Express x16 bus add-in card connector
• One Secondary PCI Express x16/x4 bus add-in card connector
• One PCI Express x1 bus add-in card connector
continued
10
Product Description
Table 1.
Feature Summary (continued)
• 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
1.1.2
Manufacturing Options
Table 2 describes the manufacturing options. Not every manufacturing option is available in all
marketing channels. Please contact your Intel representative to determine which manufacturing
options are available to you.
Table 2.
Manufacturing Options
Alternate (ALT)
Power Input
Connector
Provides required additional power when using high power (75 W or greater) add-in
cards in both the PCI Express x16 and the Secondary PCI Express x16/x4 bus add-in
card connectors
ATAPI CD-ROM
connector
A 1 x 4-pin ATAPI-style connector for connecting an internal ATAPI CD-ROM drive to
the audio mixer
Audio Subsystem
Intel High Definition Audio subsystem in one of the following configurations:
• 8-channel (7.1) audio subsystem with five analog audio outputs and two S/PDIF
digital audio outputs (coaxial and optical) using the Sigmatel 9221 audio codec
• 6-channel (5.1) audio subsystem with three analog audio outputs using the
Sigmatel 9220 audio codec
Auxiliary (AUX)
Power Output
Connector
Provides power for internal chassis lighting
Discrete SATA
RAID controller
• Silicon Image Sil 3114 SATA RAID controller
IEEE-1394a/b
Interface
IEEE-1394a/b controller and three IEEE-1394a/b connectors: one back panel
connector, two front-panel connectors. Back panel connector is IEEE-1394acompatible only; front panel connectors are 1394a- or 1394b-compatible, configurable
through the BIOS Setup program.
Processor power
connector
One of the following connectors for providing +12 V power to the processor voltage
regulator:
• Four SATA connectors (in addition to the four SATA connectors on the ICH7-R
SATA interface)
• 2 x 4-pin (requires a power supply with a dual-rail 2 x 4 power cable)
• 2 x 2-pin
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.
Trusted Platform
Module (TPM)
A component that enhances platform security
For information about
Refer to
Available configurations for the board
Section 1.2, page 15
11
Intel Desktop Board D955XBK Technical Product Specification
1.1.3
Board Layout
Figure 1 shows the location of the major components.
A
B
C D E F G
H
I
J
K
OO
NN
MM
LL
L
KK
M
N
JJ
O
P
II
Q
HH
GG EE
FF
Y
CC AA
DD BB
Z
U
W
X
T
S R
V
OM17719
Figure 1. Desktop Board Components
Table 3 lists the components identified in Figure 1.
12
Product Description
Table 3.
Components Shown in Figure 1
Item/callout from Figure 1
Description
A
Auxiliary rear fan connector
B
ATAPI CD-ROM connector (optional)
C
Audio codec
D
Front panel audio connector
E
Secondary PCI Express x16/x4 bus add-in card connector
F
Gigabit Ethernet Controller
G
PCI Express x16 bus add-in card connector
H
Back panel connectors
I
Processor power connector
J
Alternate power connector (optional)
K
Rear chassis fan connector
L
LGA775 processor socket
M
Intel 82955X MCH
N
Processor fan connector
O
Intel 82801GR I/O Controller Hub (ICH7-R)
P
DIMM Channel A sockets [2]
Q
DIMM Channel B sockets [2]
R
I/O controller
S
Power connector
T
Diskette drive connector
U
Parallel ATE IDE connector
V
Battery
W
Front chassis fan connector
X
BIOS Setup configuration jumper block
Y
Firmware Hub (FWH)
Z
Chassis intrusion connector
AA
Serial ATA connectors (ICH7-R RAID) [4]
BB
Front panel USB connectors [2]
CC
Auxiliary front panel power LED connector
DD
Front panel connector
EE
SCSI Hard Drive Activity LED (optional)
FF
Auxiliary power output connector (optional)
GG
Serial ATA RAID controller (Discrete RAID) (optional)
HH
Serial ATA RAID connectors (Discrete RAID) (optional) [4]
II
IEEE-1394a/b front panel connectors [2]
JJ
IEEE-1394a/b PHY component (optional)
KK
IEEE-1394a/b Link component (optional)
LL
SPI Flash device
MM
PCI Conventional bus add-in card connectors [3]
NN
Speaker
OO
PCI Express x1 bus add-in card connector
13
Intel Desktop Board D955XBK Technical Product Specification
1.1.4
Block Diagram
Figure 2 is a block diagram of the major functional areas of the board.
Gigabit Ethernet
Controller
PCI Express Interface
PCI Express x1 Slot
SMBus
Back Panel/Front Panel
USB Ports
USB
Secondary PCI
Express x16/x4 Slot
LAN
Connector
Serial Port
Parallel ATA
IDE Connector
LPC Bus
I/O
Controller
Parallel ATA
IDE Interface
Parallel Port
PS/2 Mouse
PS/2 Keyboard
System Bus
(1066/800 MHz)
Channel A
DIMMs (2)
Dual-Channel
Memory Bus
SMBus
SATA RAID
Connectors (4)
(Optional)
-- or -SPI Flash
Device
Intel 955X Chipset
TPM Component
(Optional)
Channel B
DIMMs (2)
IEEE-1394a/b Connectors
(Optional)
Intel 82801GR
I/O Controller Hub
(ICH7-R)
LPC Bus
SMBus
PCI Express
x16
Connector
Intel 82955X
Memory Controller
Hub (MCH)
Firmware
Hub (FWH)
IEEE-1394a/b
Controller
(Optional)
Discrete SATA RAID
Controller
(Optional)
PCI
Bus
High Definition Audio Link
PCI Express
x16 Interface
Diskette Drive
Connector
LPC Bus
DMI Interconnect
LGA775
Processor Socket
SATA IDE
Interface
SATA IDE
Connectors (4)
Front Panel Mic In
Front Panel Line Out
PCI
Bus
Mic In/Retasking Jack
Line In/Retasking Jack
PCI Bus
Audio
Codec
PCI Slot 1
PCI Slot 2
PCI Slot 3
Line Out/Retasking Jack
CD-ROM (Optional)
SMBus
Hardware Monitoring
and Fan Control ASIC
S/PDIF
Center and LFE/Retasking Jack
Surround Left-Right/Retasking Jack
OM17557
Figure 2. Block Diagram
14
Product Description
1.2 Online Support
To find information about…
Visit this World Wide Web site:
Intel Desktop Board D955XBK 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 D955XBK
http://developer.intel.com/design/motherbd/bk/bk_available.htm
Processor data sheets
http://www.intel.com/design/litcentr
ICH7-R 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
1.3 Processor
The board is designed to support Intel Pentium 4 processors in an LGA775 processor socket with a
1066 or 800 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 board
http://www.intel.com/design/motherbd/bk/bk_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
This board has specific requirements for providing power to the processor. Refer to Section 2.7.2.1
on page 60 for information on power supply requirements for this board.
15
Intel Desktop Board D955XBK Technical Product Specification
1.4 System Memory
The board has four DIMM sockets and supports the following memory features:
•
•
1.8 V and 1.9 V DDR2 SDRAM DIMMs
Unbuffered, single-sided or double-sided DIMMs with the following restriction:
Double-sided DIMMS with x16 organization are not supported.
•
•
•
•
•
8 GB maximum total system memory. Refer to Section 2.1.1 on page 45 for information on the
total amount of addressable memory.
Minimum total system memory: 128 MB
ECC DIMMs and non-ECC DIMMs
Serial Presence Detect
DDR2 667 and 533 MHz SDRAM DIMMs
NOTES
•
•
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.
Table 4 lists the supported DIMM configurations.
Table 4.
Supported Memory Configurations
DIMM
Capacity
Configuration
(Note 1)
SDRAM
Density
SDRAM Organization
Front-side/Back-side
Number of SDRAM
Devices (Note 2)
128 MB
SS
256 Mbit
16 M x 16/empty
4
[5]
256 MB
SS
256 Mbit
32 M x 8/empty
8
[9]
256 MB
SS
512 Mbit
32 M x 16/empty
4
[5]
512 MB
DS
256 Mbit
32 M x 8/32 M x 8
16
[18]
512 MB
SS
512 Mbit
64 M x 8/empty
8
[9]
512 MB
SS
1 Gbit
64 M x 16/empty
4
[5]
1024 MB
DS
512 Mbit
64 M x 8/64 M x 8
16
[18]
1024 MB
SS
1 Gbit
128 M x 8/empty
8
[9]
2048 MB
DS
1 Gbit
128 M x 8/128 M x 8
16
[18]
Notes:
#
1.
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).
2.
In the fifth column, the number in brackets specifies the number of SDRAM devices on an ECC DIMM.
INTEGRATOR’S NOTE
Refer to Section 2.1.1, on page 45 for additional information on available memory.
16
Product Description
1.4.1
Memory Configurations
The Intel 82955X MCH 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 3 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
OM17720
Figure 3. Memory Channel and DIMM Configuration
17
Intel Desktop Board D955XBK Technical Product Specification
1.4.1.1
Dual Channel (Interleaved) Mode Configurations
Figure 4 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 4. Dual Channel (Interleaved) Mode Configuration with Two DIMMs
Figure 5 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 5. Dual Channel (Interleaved) Mode Configuration with Three DIMMs
18
Product Description
Figure 6 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 6. Dual Channel (Interleaved) Mode Configuration with Four DIMMs
19
Intel Desktop Board D955XBK Technical Product Specification
1.4.1.2
Single Channel (Asymmetric) Mode Configurations
NOTE
Dual channel (Interleaved) mode configurations provide the highest memory throughput.
Figure 7 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 7. Single Channel (Asymmetric) Mode Configuration with One DIMM
Figure 8 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 8. Single Channel (Asymmetric) Mode Configuration with Three DIMMs
20
Product Description
1.5 Intel® 955X Chipset
The Intel 955X chipset consists of the following devices:
•
•
•
Intel 82955X Memory Controller Hub (MCH) with Direct Media Interface (DMI) interconnect
Intel 82801GR I/O Controller Hub (ICH7-R) with DMI interconnect
BIOS storage in one of the following:
⎯ Firmware Hub (FWH)
⎯ Serial Peripheral Interface (SPI) Flash device
The MCH is a centralized controller for the system bus, the memory bus, the PCI Express bus, and
the DMI interconnect. The ICH7-R is a centralized controller for the board’s I/O paths.
For information about
Refer to
The Intel 955X chipset
http://developer.intel.com/
Resources used by the chipset
Chapter 2
1.5.1
USB
The board supports up to eight USB 2.0 ports, supports UHCI and EHCI, and uses UHCI- and
EHCI-compatible drivers.
The ICH7-R 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
NOTES
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 55
The location of the front panel USB connectors
Figure 19, page 56
1.5.2
IDE Support
The board provides five IDE interface connectors:
•
•
1.5.2.1
One parallel ATA IDE connector that supports two devices
Four serial ATA IDE connectors that support one device per connector
Parallel ATE IDE Interface
The ICH7-R’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.
21
Intel Desktop Board D955XBK Technical Product Specification
•
•
•
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 ICH7-R’s
ATA-100 logic can achieve read transfer rates up to 100 MB/sec and write transfer rates up to
88 MB/sec.
NOTE
ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections,
noise, and inductive coupling.
The 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.
For information about
Refer to
The location of the Parallel ATA IDE connector
Figure 19, page 56
1.5.2.2
Serial ATA Interfaces
The ICH7-R’s Serial ATA controller offers four independent Serial ATA ports with a theoretical
maximum transfer rate of 3 Gbits/sec 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/
22
For information about
Refer to
The location of the Serial ATA IDE connectors on the D955XBK board
Figure 19, page 56
Product Description
1.5.2.3
Serial ATA RAID
The ICH7-R supports the following RAID (Redundant Array of Independent Drives) levels:
•
•
•
•
1.5.2.4
RAID 0 - data striping. Multiple physical drives can be teamed together to create one logical
drive. As data is written or retrieved from the logical drive, both drives operate in parallel, thus
increasing the throughput. The ICH7-R allows for more than two drives to be used in a
RAID 0 configuration.
RAID 1 - data mirroring. Multiple physical drives maintain duplicate sets of all data on
separate disk drives. Level 1 provides the highest data reliability because two complete copies
of all information are maintained. The ICH7-R allows for two or four drives to be used in a
RAID 1 configuration.
RAID 0+1 (or RAID 10) - data striping and mirroring. RAID 0+1 combines multiple mirrored
drives (RAID 1) with data striping (RAID 0) into a single array. This provides the highest
performance with data protection. Data is striped across all mirrored sets. RAID 0+1 utilizes
several drives to stripe data (increased performance) and then makes a copy of the striped
drives to provide redundancy. The mirrored disks eliminate the overhead and delay of parity.
RAID 5 - distributed parity. RAID Level 5 stripes data at a block level across several drives
and distributes parity among the drives; no single disk is devoted to parity. Because parity data
is distributed on each drive, read performance tends to be lower than other RAID types.
RAID 5 requires the use of three or four drives.
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
Figure 19, page 56
The signal names of the SCSI hard drive activity LED connector
Table 23, page 59
1.5.3
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.
23
Intel Desktop Board D955XBK Technical Product Specification
1.6 Discrete Serial ATA Interface (Optional)
As a manufacturing option, the board provides a Silicon Image Sil 3114 Serial ATA (SATA)
controller and four connectors (that support one device per connector) for SATA devices. These
connectors are in addition to the four SATA connectors of the ICH7-R SATA interface.
The Sil 3114 controller uses the PCI bus for data transfer and provides a maximum data transfer
rate of up to 1.5 Gbits/sec. The discrete SATA interface supports the following RAID levels:
•
•
•
RAID 0
RAID 1
RAID 0+1
For information about
Refer to
RAID levels
Section 1.5.2.3, page 23
The location of the discrete SATA RAID connectors
Figure 19, page 56
1.7 PCI Express Connectors
The board provides the following PCI Express connectors:
•
•
•
#
One PCI Express x16 connector. The x16 interface supports simultaneous (full duplex)
transfers up to 8 GBytes/sec. Single-ended (half duplex) transfers are supported at up to
4 GBytes/sec.
One Secondary PCI Express x16/x4 bus add-in card connector: The board provides a PCI
Express add-in card connector in the form of a physical x16 connector with electrical routing of
x4. It is important to note that this connector is an electrical equivalent of a PCI Express x4 bus
add-in card connector. This connector supports x4 and x1 PCI Express add-in cards.
One PCI Express x1 connector. The x1 interface supports simultaneous transfers up to
500 MBytes/sec.
INTEGRATOR’S NOTE
Although the PCI Express specification allows x16 cards to auto-negotiate down from x16 to x4
and x1 and may function properly, such configurations have not been validated on this board.
Please consult your add-in card vendor prior to attempting to use a PCI Express x16 add-in card in
this connector.
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 includes the following:
•
•
•
•
•
•
24
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
Product Description
1.8 Auxiliary Power (AUX PWR) Output Connector (Optional)
The D955XBK board includes a 1x4 power connector that can be used to provide power for
internal chassis lighting or additional fans. The on/off function of this connector is controlled from
within the BIOS Setup Program. The default setting in the BIOS is for this connector to be off.
#
INTEGRATOR’S NOTES
When using this connector, observe the following precautions:
• Do not use a Y-adapter, power splitter, or SATA power adapter to attach storage devices (such
as hard disk drives or CD/DVD drives) to this connector. This connector will not provide
adequate power for storage devices.
• Do not connect any devices to this connector that draw more than 1.5 A. The connector
circuitry includes overcurrent protection components that limit the current draw to a maximum
of 1.5 A.
For information about
Refer to
The location of the optional auxiliary power output connector
Figure 19, page 56
The signal names of the optional auxiliary power output connector
Table 25, page 59
1.9 IEEE-1394a/b Connectors (Optional)
The optional IEEE-1394 interface addresses interconnection of both computer peripherals and
consumer electronics with these features:
•
•
•
•
•
IEEE-1394a and IEEE-1394b operation
Support for up to 63 peer-to-peer devices
Operation ranging from 100 Mbits/sec to 800 Mbits/sec (depending on cable type)
Connection over short and long distances
Support for both asynchronous and isochronous data transfer
As a manufacturing option, the board includes three IEEE-1394a/b connectors as follows:
•
•
One IEEE-1394a connector located on the back panel. This connector supports IEEE-1394a
operation only; IEEE-1394b operation is not supported.
Two IEEE-1394a/b front-panel connectors located on the component side. These connectors
can be independently configured for either IEEE-1394a or IEEE-1394b operation using the
BIOS Setup program.
The IEEE-1394a interface provides a throughput ranging from 100 Mbits/sec to 400 Mbits/sec.
The IEEE-1394b interface is completely compatible with IEEE-1394a. IEEE-1394b also supports
higher data transfer rates (800 Mbits/sec) and longer distances.
25
Intel Desktop Board D955XBK Technical Product Specification
For information about
Refer to
The location of the back panel IEEE-1394a connector
Figure 17, page 54
The location of the front panel IEEE-1394a/b connectors
Figure 19, page 56
The signal names of the front panel IEEE-1394a/b connectors
Section 2.7.2.6, page 66
1.10 I/O Controller
The I/O controller provides the following features:
•
•
•
•
•
•
•
One serial port
One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
Serial IRQ interface compatible with serialized IRQ support for PCI 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.
1.10.1
Serial Port
The board has one serial port connector located on the back panel. The serial port supports data
transfers at rates of 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 55
1.10.2
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 55
1.10.3
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 D955XBK board
Figure 19, page 56
1.10.4
Keyboard and Mouse Interface
PS/2 keyboard and mouse connectors are located on the back panel.
26
Product Description
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 55
1.11 Audio Subsystem
The board supports the Intel High Definition audio subsystem based on the Sigmatel 9221 or the
Sigmatel 9220 audio codec. The audio subsystem supports the following features:
•
•
•
•
1.11.1
Advanced jack sense for the back panel audio jacks that enables the audio codec to recognize
the device that is connected to an audio port. The back panel audio 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 back panel jacks
Line out and Mic in functions for front panel audio jacks
A signal-to-noise (S/N) ratio of 90 dB
Audio Subsystem Software
Audio software and drivers are available from Intel’s World Wide Web site.
For information about
Refer to
Obtaining audio software and drivers
Section 1.2, page 15
1.11.2
Audio Connectors
The board contains audio connectors 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)
The functions of the back panel audio connectors are dependent on which subsystem is present.
The 8-channel (7.1) audio subsystem is described in Section 1.11.3; the 6-channel (5.1) audio
subsystem is described in Section 1.11.4.
For information about
Refer to
The locations of the front panel audio connector and the optional ATAPI
CD-ROM connector
Figure 19, page 56
The signal names of the front panel audio connector
Table 19, page 58
The signal names of the optional ATAPI CD-ROM connector
Table 18, page 58
The back panel audio connectors
Section 2.7.1, page 53
27
Intel Desktop Board D955XBK Technical Product Specification
1.11.3
8-Channel (7.1) Audio Subsystem
The 8-channel (7.1) audio subsystem includes the following:
•
•
•
Intel 82801GR I/O Controller Hub (ICH7-R)
Sigmatel 9221 audio codec
Microphone input that supports a single dynamic, condenser, or electret microphone
The back panel audio connectors are configurable through the audio device drivers. The available
configurable audio ports are shown in Figure 9.
Front Panel
Audio Connectors
Mic In
Line Out
Surround Left and Right/Retasking Jack
[Black]
Center channel and LFE (Subwoofer)/
Retasking Jack [Orange]
S/PDIF
Digital Audio Out
Coaxial
Side Surround
Left and Right/
Line In/Retasking Jack
[Blue]
S/PDIF Digital Audio Out
Optical
Mic In/Retasking Jack
[Pink]
Line Out/Retasking Jack
[Lime Green]
OM17555
Figure 9. Front/Back Panel Audio Connector Options for 8-Channel (7.1) Audio Subsystem
28
Product Description
Figure 10 is a block diagram of the 8-channel (7.1) audio subsystem.
Front Panel Mic In
Front Panel Line Out
Mic In/Retasking Jack
82801GR
I/O Controller
Hub
(ICH7-R)
Intel
High Definition
Audio Link
Side Surround L-R/Line In/Retasking Jack
Sigmatel 9221
Audio Codec
Line Out/Retasking Jack
Center and LFE/Retasking Jack
Surround Left-Right/Retasking Jack
CD-ROM (optional)
S/PDIF
OM17556
Figure 10. 8-channel (7.1) Audio Subsystem Block Diagram
For information about
The back panel audio connectors
Refer to
Section 2.7.1, page 53
29
Intel Desktop Board D955XBK Technical Product Specification
1.11.4
6-Channel (5.1) Audio Subsystem
The 6-channel (5.1) audio subsystem includes the following:
•
•
•
Intel 82801GR I/O Controller Hub (ICH7-R)
Sigmatel 9220 audio codec
Microphone input that supports a single dynamic, condenser, or electret microphone
The back panel audio connectors are configurable through the audio device drivers. The available
configurable audio ports are shown in Figure 11.
Back Panel
Audio Connectors
Front Panel
Audio Connectors
Line Out
Mic In
Line In/
Retasking Jack
Line Out/
Retasking Jack
Mic In/
Retasking Jack
OM17560
Figure 11. Front/Back Panel Audio Connector Options for 6-Channel (5.1) Audio Subsystem
Figure 12 is a block diagram of the 6-channel (5.1) audio subsystem.
Mic In/Retasking Jack
82801GR
I/O Controller
Hub
(ICH7-R)
Line In/Retasking Jack
Intel
High Definition
Audio Link
Sigmatel
9220
Audio Codec
Line Out/Retasking Jack
Front Panel Mic In
Front Panel Line Out
CD-ROM (optional)
OM17554
Figure 12. 6-Channel (5.1) Audio Subsystem Block Diagram
For information about
The back panel audio connectors
30
Refer to
Section 2.7.1, page 53
Product Description
1.12 LAN Subsystem
The LAN subsystem includes the Intel® 82573 Gigabit (10/100/1000 Mbits/sec) Ethernet
Controller and an RJ-45 LAN connector with integrated status LEDs.
Intel® 82573E/82573V/82574V Gigabit Ethernet Controller
1.12.1
The Intel 82573E/82573V/82574V Gigabit Ethernet Controller supports the following features:
•
•
•
•
•
•
•
•
•
PCI Express link
10/100/1000 IEEE 802.3 compliant
Compliant to IEEE 802.3x flow control support
Jumbo frame support
TCP, IP, UDP checksum offload
Transmit TCP segmentation
Advanced packet filtering
Full device driver compatibility
PCI Express Power Management Support
The 82573E Gigabit Ethernet Controller also supports Alert Standard Format (ASF) 2.0.
1.12.2
RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector (as shown in Figure 13). Table 5 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 5.
LED
Left
Right
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
31
Intel Desktop Board D955XBK Technical Product Specification
1.12.3
Alert Standard Format (ASF) Support
The board provides the following ASF support for 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
LAN Subsystem Software
LAN software and drivers are available from Intel’s World Wide Web site.
1.12.4
Intel® Active Management Technology (AMT) (Optional)
Intel Active Management Technology (AMT) offers IT organizations tamper-resistant and
persistent management capabilities. Specifically, Intel® AMT is a hardware-based solution that
offers encrypted and persistent asset management and remote diagnostics and/or recovery
capabilities for networked platforms. With Intel AMT, IT organizations can easily get accurate
platform information, and can perform remote updating, diagnostics, debugging and repair of a
system, regardless of the state of the operating system and the power state of the system. Intel
AMT enables IT organizations to discover, heal, and protect all of their computing assets,
regardless of system state in the manner described below.
•
Discovering hardware and software computing assets:
⎯ Intel AMT stores hardware and software asset information in non-volatile memory and
allows IT to read the asset information anytime, even if the PC is off
⎯ Users cannot remove or prevent IT organization access to the information because it does
not rely on software agents
32
Product Description
•
•
Healing systems remotely, regardless of the operating system or system state:
⎯ Intel AMT provides out-of-band diagnostics and recovery capabilities for IT organizations
to remotely diagnose and repair PCs after software, operating system, or hardware failures
⎯ Alerting and event logging help IT organizations detect and diagnose problems quickly to
reduce end-user downtime
Protecting the enterprise against malicious software attacks:
⎯ Intel AMT helps IT organizations keep software versions and virus protection consistent
and up-to-date across the enterprise
⎯ Version information is stored in non-volatile memory for access anytime by third party
software to check and, if necessary, wake a system to perform off-hours updates.
The key features of Intel AMT include:
•
•
•
•
•
Secure Out of Band (OOB) system management that allows remote management of PCs
regardless of system power or operating system state.
⎯ SSL3.1/TLS encryption
⎯ HTTP authentication
⎯ TCP/IP
⎯ HTTP web GUI
⎯ XML/SOAP API
Remote troubleshooting and recovery that can significantly reduce desk-side visits and
potentially increasing efficiency of IT technical staff.
⎯ System event log
⎯ IDE-R or PXE boot; Network drive or remote CD boot
⎯ Serial over LAN
⎯ OOB diagnostics
⎯ Remote control
⎯ Remote BIOS update
Proactive alerting that decreases downtime and minimizes time to repair.
⎯ Programmable policies
⎯ Operating system lock-up alert
⎯ Boot failure alert
⎯ Hardware failure alerts
Third party non-volatile storage that prevents users from removing critical inventory, remote
control, or virus protection agents.
⎯ Nonvolatile storage for agents
⎯ Tamper-resistant
Remote hardware and software asset tracking that eliminates time-consuming manual inventory
tracking, which also reduces asset accounting costs.
⎯ E-Asset Tag
⎯ HW/SW inventory
For information about
Refer to
Intel Active Management Technology
http://www.intel.com/technology/manage/iamt/index.htm
33
Intel Desktop Board D955XBK Technical Product Specification
1.12.5
LAN Subsystem Software
LAN software and drivers are available from Intel’s World Wide Web site.
For information about
Refer to
Obtaining LAN software and drivers
Section 1.2, page 15
1.13 Hardware Management Subsystem
The hardware management features enable the board to be compatible with the Wired for
Management (WfM) specification. The board has several hardware management features,
including the following:
•
•
•
1.13.1
Fan monitoring and control (through the hardware monitoring and fan control ASIC)
Thermal and voltage monitoring
Chassis intrusion detection
Hardware Monitoring and Fan Control ASIC
The features of the hardware monitoring and fan control ASIC include:
•
•
•
•
•
34
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
For information about
Refer to
The location of the fan connectors and sensors for thermal monitoring
Figure 14, page 35
Product Description
1.13.2
Thermal Monitoring
Figure 14 shows the location of the sensors and fan connectors.
4
G
1
3
A
1
B
4
1
3
D
C
1
F
E
OM17725
Item
Description
A
B
C
D
E
F
G
Remote ambient temperature sensor
Thermal diode, located on processor die
Ambient temperature sensor, internal to hardware monitoring and fan control ASIC
Processor fan connector
Rear chassis fan connector
Front chassis fan connector
Auxiliary rear fan connector
Figure 14. Sensors and Fan Connectors
35
Intel Desktop Board D955XBK Technical Product Specification
1.13.3
Fan Monitoring
Fan monitoring can be implemented using Intel Desktop Utilities or third-party software. The level
of monitoring and control is dependent on the hardware monitoring ASIC used with the Desktop
Board.
For information about
Refer to
The functions of the fan connectors
Section 1.14.2.2, page 40
1.13.4
Chassis Intrusion and Detection
The board supports a chassis security feature that detects if the chassis cover is removed. The
security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion
connector. When the chassis cover is removed, the mechanical switch is in the closed position.
1.14 Power Management
Power management is implemented at several levels, including:
•
•
1.14.1
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
⎯ PCI Express WAKE# signal support
ACPI
ACPI gives the operating system direct control over the power management and Plug and Play
functions of a computer. The use of ACPI with this board requires an operating system that
provides full ACPI support. ACPI features include:
•
•
•
•
•
•
36
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 8 on page 39)
Support for a front panel power and sleep mode switch
Product Description
Table 6 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 6.
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)
1.14.1.1
…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.
37
Intel Desktop Board D955XBK Technical Product Specification
Table 7 lists the power states supported by the board along with the associated system power
targets. See the ACPI specification for a complete description of the various system and power
states.
Table 7.
Power States and Targeted System Power
Global States
Sleeping States
Processor
States
G0 – working
state
S0 – working
C0 – working
D0 – working
state.
Full power > 30 W
G1 – sleeping
state
S1 – Processor
stopped
C1 – stop
grant
D1, D2, D3 –
device
specification
specific.
5 W < power < 52.5 W
G1 – sleeping
state
S3 – Suspend to
RAM. Context
saved to RAM.
No power
D3 – no power
except for
wake-up logic.
Power < 5 W
(Note 2)
G1 – sleeping
state
S4 – Suspend to
disk. Context
saved to disk.
No power
D3 – no power
except for
wake-up logic.
Power < 5 W
(Note 2)
G2/S5
S5 – Soft off.
Context not saved.
Cold boot is
required.
No power
D3 – no power
except for
wake-up logic.
Power < 5 W
(Note 2)
G3 –
mechanical off
No power to the
system.
No power
D3 – no power for
wake-up logic,
except when
provided by
battery or external
source.
No power to the system.
Service can be performed
safely.
AC power is
disconnected
from the
computer.
Device States
Targeted System
Power (Note 1)
Notes:
38
1.
Total system power is dependent on the system configuration, including add-in boards and peripherals powered
by the system chassis’ power supply.
2.
Dependent on the standby power consumption of wake-up devices used in the system.
Product Description
1.14.1.2
Wake-up Devices and Events
Table 8 lists the devices or specific events that can wake the computer from specific states.
Table 8.
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#
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.
1.14.2
Hardware Support
CAUTION
Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities and
Instantly Available PC technology features are used. Failure to do so can damage the power
supply. The total amount of standby current required depends on the wake devices supported and
manufacturing options.
The board provides several power management hardware features, including:
•
•
•
•
•
•
•
•
•
Power connector
Fan connectors
LAN wake capabilities
Instantly Available PC technology
Resume on Ring
Wake from USB
Wake from PS/2 keyboard
PME# signal wake-up support
WAKE# signal wake-up support
LAN wake capabilities and Instantly Available PC technology require power from the +5 V
standby line.
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).
39
Intel Desktop Board D955XBK Technical Product Specification
NOTE
The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an
operating system that provides full ACPI support.
1.14.2.1
Power Connector
When an ACPI-enabled system receives the appropriate 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
Figure 19, page 56
The signal names of the main power connector
Table 26, page 60
1.14.2.2
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
Figure 19, page 56
The location of the fan connectors and sensors for thermal monitoring
Figure 14, page 35
The signal names of the fan connectors
Section 2.7.1.1, page 54
1.14.2.3
LAN Wake Capabilities
CAUTION
For LAN wake capabilities, the +5 V standby line for the power supply must be capable of
providing adequate +5 V standby current. Failure to provide adequate standby current when
implementing LAN wake capabilities can damage the power supply.
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 board supports LAN wake capabilities with ACPI in
the following ways:
•
•
40
The PCI Express WAKE# signal
The PCI Conventional bus PME# signal for PCI 2.2 compliant LAN designs
Product Description
•
1.14.2.4
The onboard LAN subsystem
Instantly Available PC Technology
CAUTION
For Instantly Available PC technology, the +5 V standby line for the power supply must be capable
of providing adequate +5 V standby current. Failure to provide adequate standby current when
implementing Instantly Available PC technology can damage the power supply.
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-RAM)
sleep-state. While in the S3 sleep-state, the computer will appear to be off (the power supply is off,
and the front panel LED is amber if dual colored, or off if single colored.) When signaled by a
wake-up device or event, the system quickly returns to its last known wake state. Table 8 on page
39 lists the devices and events that can wake the computer from the S3 state.
The board supports 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.
1.14.2.5
Resume on Ring
The operation of Resume on Ring can be summarized as follows:
•
•
•
1.14.2.6
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
Wake from USB
USB bus activity wakes the computer from ACPI S1 or S3 states.
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB.
1.14.2.7
Wake from PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1 or S3 state.
1.14.2.8
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).
1.14.2.9
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.
41
Intel Desktop Board D955XBK Technical Product Specification
1.14.2.10
+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 15 shows the location of the standby power indicator LED on the
D955XBK 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
OM17721
Figure 15. Location of the Standby Power Indicator LED
42
Product Description
1.15 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.
For information about
Refer to
TPM
http://www.intel.com/design/motherbd/bk/
43
Intel Desktop Board D955XBK Technical Product Specification
44
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
Memory Resources ...................................................................................................... 45
DMA Channels ............................................................................................................. 47
Fixed I/O Map............................................................................................................... 48
PCI Configuration Space Map...................................................................................... 49
Interrupts ...................................................................................................................... 50
PCI Conventional Interrupt Routing Map ..................................................................... 51
Connectors................................................................................................................... 53
Jumper Block ............................................................................................................... 67
Mechanical Considerations .......................................................................................... 68
Electrical Considerations.............................................................................................. 71
Thermal Considerations ............................................................................................... 73
Reliability...................................................................................................................... 75
Environmental .............................................................................................................. 76
Regulatory Compliance................................................................................................ 77
2.1 Memory Resources
2.1.1
Addressable Memory
The board utilizes 8 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 8 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)
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
add-in cards
The board provides the capability to reclaim the physical memory overlapped by the memory
mapped I/O logical address space. The board remaps physical memory from the top of usable
DRAM boundary to the 4 GB boundary to an equivalent sized logical address range located just
above the 4 GB boundary. Figure 16 shows a schematic of the system memory map. All installed
system memory can be used when there is no overlap of system addresses.
45
Intel Desktop Board D955XBK Technical Product Specification
8 GB
Top of System Address Space
Upper
4 GB of
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
1 MB
Upper BIOS
area (64 KB)
960 KB
Lower BIOS
area
(64 KB;
16 KB x 4)
896 KB
Add-in Card
BIOS and
Buffer area
(128 KB;
16 KB x 8)
768 KB
Standard PCI/
ISA Video
Memory (SMM
Memory)
128 KB
640 KB
09FFFFH
DOS area
(640 KB)
0 MB
00000H
0 KB
OM17801
Figure 16. Detailed System Memory Address Map
46
Technical Reference
2.1.2
Memory Map
Table 9 lists the system memory map.
Table 9.
System Memory Map
Address Range (decimal)
Address Range (hex)
Size
Description
1024 K - 8388608 K
100000 - 1FFFFFFFF
8191 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
2.2 DMA Channels
Table 10.
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
47
Intel Desktop Board D955XBK Technical Product Specification
2.3 Fixed I/O Map
Table 11.
I/O Map
Address (hex)
Size
Description
0000 - 00FF
256 bytes
Used by the Desktop Board D955XBK. Refer to the
ICH7-R data sheet for dynamic addressing information.
0170 - 0177
8 bytes
Secondary Parallel ATA IDE channel command block
01F0 - 01F7
8 bytes
Primary Parallel ATA IDE channel command block
(Note 1)
8 bytes
LPT3
0278 - 027F (Note 1)
8 bytes
LPT2
02E8 - 02EF
(Note 1)
8 bytes
COM4
02F8 - 02FF
(Note 1)
0228 - 022F
8 bytes
COM2
0374 - 0377
4 bytes
Secondary Parallel ATA IDE channel control block
0377, bits 6:0
7 bits
Secondary IDE channel status port
0378 - 037F
8 bytes
LPT1
03E8 - 03EF
8 bytes
COM3
03F0 - 03F5
6 bytes
Diskette channel
03F4 – 03F7
1 byte
Primary Parallel ATA IDE channel control block
03F8 - 03FF
8 bytes
COM1
04D0 - 04D1
2 bytes
Edge/level triggered PIC
8 bytes
ECP port, LPTn base address + 400h
LPTn + 400
0CF8 - 0CFB
(Note 2)
4 bytes
PCI Conventional bus configuration address register
0CF9 (Note 3)
1 byte
Reset control register
0CFC - 0CFF
4 bytes
PCI Conventional bus configuration data register
FFA0 - FFA7
8 bytes
Primary Parallel ATA IDE bus master registers
FFA8 - FFAF
8 bytes
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 ICH7-R address aliasing. The ICH7-R
data sheet provides more information on address aliasing.
48
For information about
Refer to
Obtaining the ICH7-R data sheet
Section 1.2 on page 15
Technical Reference
2.4 PCI Configuration Space Map
Table 12.
PCI Configuration Space Map
Bus
Number (hex)
Device
Number (hex)
Function
Number (hex)
Description
00
00
00
Memory controller of Intel 82955X component
00
01
00
PCI Express x16 graphics port
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 Ethernet controller bridge)
00
1C
02
PCI Express port 3
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)
00
00
Gigabit Ethernet Controller
(Note)
00
00
PCI Conventional bus connector 1
(Note)
01
00
PCI Conventional bus connector 2
(Note)
02
00
PCI Conventional bus connector 3
(Note)
05
00
IEEE-1394a/b controller
Note:
Bus number is dynamic and can change based on add-in cards used.
49
Intel Desktop Board D955XBK Technical Product Specification
2.5 Interrupts
The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the
Advanced Programmable Interrupt Controller (APIC) portion of the ICH7-R 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 13.
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
User available
4
COM1 (Note 1)
5
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 Parallel ATA/Serial ATA – Legacy Mode (if present, else user available)
15
Secondary Parallel ATA/Serial ATA – Legacy Mode (if present, else user available)
16 (Note 2)
User available (through PIRQA)
17 (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)
Notes:
50
1.
Default, but can be changed to another IRQ.
2.
Available in APIC mode only.
Technical Reference
2.6 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 ICH7-R 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 14 shows an example of how the
PIRQ signals are routed.
For example, using Table 14 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 ICH7-R audio controller. The add-in card in PCI Conventional bus
connector 3 now shares an interrupt with the onboard interrupt source.
51
Intel Desktop Board D955XBK Technical Product Specification
Table 14.
PCI Interrupt Routing Map
ICH7-R PIRQ Signal Name
PCI Interrupt Source
PIRQA
PIRQE
PIRQF
PIRQG
PIRQH
PCI bus connector 1
INTD
INTA
INTB
INTC
PCI bus connector 2
INTC
INTB
INTA
INTD
IEEE-1394a/b controller
PCI bus connector 3
PIRQB
PIRQC
PIRQD
INTA
INTD
INTC
INTA
INTB
NOTE
In PIC mode, the ICH7-R 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 13 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.
52
Technical Reference
2.7 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:
•
•
2.7.1
Back panel I/O connectors
Component-side I/O connectors (see page 56)
Back Panel Connectors
The back panel configuration is dependent upon which audio subsystem is present. The
configurations are as follows:
• 8-channel (7.1) audio subsystem (five analog audio output connectors and two digital audio
output connectors), described on page 54
• 6-channel (5.1) audio subsystem (three analog audio output connectors), described on page 55
53
Intel Desktop Board D955XBK Technical Product Specification
2.7.1.1
Back Panel Connectors For 8-Channel (7.1) Audio Subsystem
Figure 17 shows the location of the back panel connectors for boards equipped with the 8-channel
(7.1) audio subsystem. The back panel connectors are color-coded. The figure legend (Table 15)
lists the colors used (when applicable).
A
D
C
B
F
E
G
H
J
K
L
I
M
N
O
OM17726
Figure 17. Back Panel Connectors for 8-Channel (7.1) Audio Subsystem
Table 15 lists the back panel connectors identified in Figure 17.
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.
Table 15.
Back Panel Connectors Shown in Figure 17
Item/callout from
Figure 17
54
Description
A
PS/2 mouse port [Green]
B
PS/2 keyboard port [Purple]
C
Serial port A [Teal]
D
Parallel port [Burgundy]
E
Digital audio out coaxial
F
IEEE-1394a connector
G
USB ports (two)
H
LAN
I
USB ports (two)
J
K
Center channel and LFE (subwoofer) audio out/ Retasking Jack G
[Orange]
Surround left/right channel audio out/Retasking Jack H [Black]
L
Audio line in/Retasking Jack C [Blue]
M
Digital audio out optical
N
Mic in/Retasking Jack B [Pink]
O
Front left/right channel audio out/Two channel audio line out/Retasking Jack D
[Lime green]
Technical Reference
2.7.1.2
Back Panel Connectors For 6-Channel (5.1) Audio Subsystem
Figure 18 shows the location of the back panel connectors for boards equipped with the 6-channel
(5.1) audio subsystem. The back panel connectors are color-coded. The figure legend (Table 16)
lists the colors used (when applicable).
A
B
H
F
D
C
E
G
I
J
OM17727
Figure 18. Back Panel Connectors for 6-Channel (5.1) Audio Subsystem
Table 16 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.
Table 16.
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
Serial port A [Teal]
D
Parallel port [Burgundy]
E
USB ports (two)
F
LAN
G
USB ports (two)
H
Audio line in/Retasking Jack C [Blue]
I
Mic in/Retasking Jack B [Pink]
J
Front left/right channel audio out/Two channel audio line out/Retasking Jack D
[Lime green]
55
Intel Desktop Board D955XBK Technical Product Specification
2.7.2
Component-side Connectors
Figure 19 shows the locations of the component-side connectors.
A B C D E F
1
I
J
K
L
2
4
10
1
G H
1
1
1
2
9
10
1
5
1
4
4
8
3
2
4
1
10
1
1
1
1
1
2
2
1
1
10
1
1
2
1
9
HH
GG
1
7
FF
2
4
2
10
4
1
1
1
1
1
EE
DD
24
CC
23
40 2
39 1
1
AA
BB
Y
Z
W
X
U
V
S
T
3
Q
2
1
P
2
1
34
33
O
N
M
R
OM17728
Figure 19. D955XBK Component-side Connectors
Table 17 lists the component-side connectors identified in Figure 19.
56
Technical Reference
Table 17.
Component-side Connectors Shown in Figure 19
Item/callout from Figure 19
Description
A
PCI Express x1 bus add-in card connector
B
Auxiliary rear fan connector
C
PCI Conventional bus add-in card connector 3
D
ATAPI CD-ROM connector (optional)
E
PCI Conventional bus add-in card connector 2
F
PCI Conventional bus add-in card connector 1
G
Front panel audio connector
H
Secondary PCI Express x16/x4 bus add-in card connector
I
PCI Express x16 bus add-in card connector
J
Alternate power connector (optional)
K
Rear chassis fan connector
L
Processor power connector
M
Processor fan connector
N
Power connector
O
Diskette drive connector
P
Parallel ATA IDE connector
Q
Front chassis fan connector
R
Chassis intrusion connector
S
Serial ATA connector 3 (ICH7-R RAID)
T
Serial ATA connector 2 (ICH7-R RAID)
U
Serial ATA connector 0 (ICH7-R RAID)
V
Serial ATA connector 1 (ICH7-R RAID)
W
Auxiliary front panel power LED connector
X
Front panel connector
Y
Front panel USB connector
Z
Auxiliary power output connector (optional)
AA
SCSI hard drive activity indicator LED (optional)
BB
Serial ATA connector 7 (Discrete RAID) (optional)
CC
Serial ATA connector 6 (Discrete RAID) (optional)
DD
Serial ATA connector 4 (Discrete RAID) (optional)
EE
Serial ATA connector 5 (Discrete RAID) (optional)
FF
Front panel IEEE-1394a/b connector [pink] (optional)
GG
Front panel IEEE-1394a/b connector [blue] (optional)
HH
Front panel USB connector
57
Intel Desktop Board D955XBK Technical Product Specification
Table 18.
Pin
Signal Name
1
Left audio input from CD-ROM
2
CD audio differential ground
3
CD audio differential ground
4
Right audio input from CD-ROM
Table 19.
#
ATAPI CD-ROM 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 20.
Pin
Signal Name
1
Control
2
+12 V
3
Tach
Table 21.
58
Front Chassis Fan and Rear Chassis
Fan Connectors
Processor Fan Connector and
Auxiliary Rear Fan Connector
Pin
Signal Name
1
Ground
2
+12 V
3
FAN_TACH
4
FAN_CONTROL
Technical Reference
Table 22.
Chassis Intrusion Connector
Pin
Signal Name
1
Intruder
2
Ground
Table 23.
SCSI Hard Drive Activity LED
Connector (Optional)
Pin
Signal Name
1
ACT#
2
No connect
Table 24.
Serial ATA Connectors
Pin
Signal Name
1
Ground
2
TXP
3
TXN
4
Ground
5
RXN
6
RXP
7
Ground
Table 25.
Auxiliary Power Output Connector
(Optional)
Pin
Signal Name
1
+12 V
2
Ground
3
Ground
4
+5 V
59
Intel Desktop Board D955XBK Technical Product Specification
2.7.2.1
Power Supply Connectors
The board has three power supply connectors:
•
•
•
Main power – a 2 x 12 connector. The board requires a power supply with a 2 x 12 main
power cable.
Processor power – This connector provides power directly to the processor voltage regulator
and must always be used. Depending on manufacturing options, the board will contain either a
2 x 4 or a 2 x 2 connector for the processor voltage regulator.
Alternate power – a 1 x 4 connector. This connector provides the required additional power
when using high power (75 W or greater) add-in cards in both the PCI Express x16 and the
Secondary PCI Express x16/x4 bus add-in card connectors.
CAUTION
Regardless of the connector type (2 x 4 or a 2 x 2), the Processor power connector must always be
used. Failure to do so will prevent the board from booting.
If the board is equipped with a 2 x 4 power connector, you must use a power supply with a dualrail 2 x 4 Processor power cable. Failure to do so may cause damage to the board.
CAUTION
If high power (75 W or greater) add-in cards are installed in both the PCI Express x16 and the
Secondary PCI Express x16/x4 bus add-in card connectors, the Alternate Power connector must be
used. Failure to do so may cause damage to the board and the add-in cards.
60
Technical Reference
Table 26.
Main Power Connector
Pin
Signal Name
Pin
Signal Name
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
22
+5 V
11
+12 V
23
+5 V
12
2 x 12 connector detect
24
Ground
Table 27.
Processor Power Connector (2 x 4 Pin)
Pin
Signal Name
Pin
Signal Name
1
Ground
5
+12 V – Rail 1
2
Ground
6
+12 V – Rail 1
3
Ground
7
+12 V – Rail 2
4
Ground
8
+12 V – Rail 2
Table 28.
Processor Power Connector (2 x 2 Pin)
Pin
Signal Name
Pin
Signal Name
1
Ground
2
+12 V
2
Ground
4
+12 V
Table 29.
Alternate Power Connector
Pin
Signal Name
1
+12 V
2
1 x 4 connector detect
3
Ground
4
+5 V
61
Intel Desktop Board D955XBK Technical Product Specification
2.7.2.2
Add-in Card Connectors
The board has the following add-in card connectors:
•
•
•
•
PCI Express x16; one connector supporting simultaneous transfers up to 8 GBytes/sec
Secondary PCI Express x16/x4 bus; one connector supporting simultaneous transfers up to
2 GBytes/sec
PCI Express x1; one connector supporting simultaneous transfers up to 500 MBytes/sec
PCI Conventional (rev 2.2 compliant) bus; three PCI Conventional bus 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 Desktop
Board. The specific SMBus signals are as follows:
⎯ The SMBus clock line is connected to pin A40.
⎯ The SMBus data line is connected to pin A41.
2.7.2.3
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 30.
62
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
Technical Reference
2.7.2.4
Front Panel Connector
This section describes the functions of the front panel connector. Table 31 lists the signal names of
the front panel connector. Figure 20 is a connection diagram for the front panel connector.
Table 31.
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 20. Connection Diagram for Front Panel Connector
63
Intel Desktop Board D955XBK Technical Product Specification
2.7.2.4.1
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:
•
•
2.7.2.4.2
A Serial ATA hard drive connected to an onboard Serial ATA connector
An IDE hard drive connected to an onboard IDE connector
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.
2.7.2.4.3
Power/Sleep LED Connector [Green]
Pins 2 and 4 [Green] can be connected to a one- or two-color LED. Table 32 shows the possible
states for a one-color LED. Table 33 shows the possible states for a two-color LED.
Table 32.
States for a One-Color Power LED
LED State
Description
Off
Power off/sleeping
Steady Green
Running
Table 33.
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 32 and Table 33 are suggested colors only. Actual LED colors are
product- or customer-specific.
2.7.2.4.4
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.
64
Technical Reference
2.7.2.5
Front Panel USB Connectors
Figure 21 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 highperformance 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 21. Connection Diagram for Front Panel USB Connectors
65
Intel Desktop Board D955XBK Technical Product Specification
2.7.2.6
Front Panel IEEE 1394a/b Connectors (Optional)
Figure 22 is a connection diagram for the IEEE 1394a/b 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 22. Connection Diagram for Front Panel IEEE 1394a/b Connectors
#
INTEGRATOR’S NOTES
•
•
•
66
The IEEE 1394a/b connectors are different colors; one connector is blue, the other connector
is pink.
The +12 V DC power on the IEEE 1394a/b connectors is fused.
Each IEEE 1394a/b connector provides one IEEE 1394a/b port.
Technical Reference
2.8 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 23 shows the location of the jumper block. The 3-pin jumper block determines the BIOS
Setup program’s mode. Table 34 describes the jumper settings for the three modes: normal,
configure, and recovery. When the jumper is set to configure mode and the computer is poweredup, the BIOS compares the processor version and the microcode version in the BIOS and reports if
the two match.
3
1
J6J2
OM17722
Figure 23. Location of the Jumper Block
Table 34.
BIOS Setup Configuration Jumper Settings
Function/Mode
Jumper Setting
Configuration
Normal
1-2
The BIOS uses current configuration information and
passwords for booting.
3
1
Configure
2-3
3
After the POST runs, Setup runs automatically. The
maintenance menu is displayed.
1
Recovery
None
3
The BIOS attempts to recover the BIOS configuration. A
recovery diskette is required.
1
67
Intel Desktop Board D955XBK Technical Product Specification
2.9 Mechanical Considerations
2.9.1
Form Factor
The board is designed to fit into an ATX-form-factor chassis. Figure 24 illustrates the mechanical
form factor for 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]
0.00
4.900
[124.46]
6.450
6.200 [163.83]
[157.48]
OM17723
Figure 24. Board Dimensions
68
Technical Reference
2.9.2
I/O Shield
The back panel I/O shield for the board must meet specific dimension and material requirements.
Systems based on this board need the back panel I/O shield to pass certification testing. Figure 25
shows the I/O shield for boards with the 8-channel (7.1) audio subsystem. Figure 26 shows the I/O
shield for boards with the 6-channel (5.1) audio subsystem. Dimensions are given in inches to a
tolerance of ±0.02 inches. The figures also indicate the position of each cutout. Additional design
considerations for I/O shields relative to chassis requirements are described in the ATX
specification.
NOTE
The I/O shield drawings in this document are for reference only. I/O shields compliant with the
ATX chassis specification 2.03 are 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]
7.01
[0.276]
Ø 1.00
[0.039]
8x R 0.5 MIN
A
A
0.00
[0.00]
11.81
[0.465]
11.81
[0.465]
12.04
[0.474]
146.88
[5.783]
113.63
[4.473]
93.74
[3.690]
61.54
[2.423]
26.91
[1.059]
20.28
[0.799]
0.00
[0.00]
8.81
[0.347]
12.81
[0.504]
14.17
[0.558]
Pictorial
View
OM17814
Figure 25. I/O Shield Dimensions for Boards with the 8-Channel (7.1) Audio Subsystem
69
Intel Desktop Board D955XBK Technical Product Specification
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]
12.04
[0.474]
146.88
[5.783]
113.63
[4.473]
93.74
[3.690]
26.911
[1.059]
20.283
[0.799]
0.00
[0.00]
8.805
[0.347]
14.17
[0.558]
Pictorial
View
OM17815
Figure 26. I/O Shield Dimensions for Boards with the 6-Channel (5.1) Audio Subsystem
70
Technical Reference
2.10 Electrical Considerations
2.10.1
DC Loading
Table 35 lists the DC loading characteristics of the board. This data is based on a DC analysis of
all active components within the board that impact its power delivery subsystems. The analysis
does not include PCI add-in cards. Minimum values assume a light load placed on the board that is
similar to an environment with no applications running and no USB current draw. Maximum
values assume a load placed on the board that is similar to a heavy gaming environment with a
500 mA current draw per USB port. These calculations are not based on specific processor values
or memory configurations but are based on the minimum and maximum current draw possible from
the board’s power delivery subsystems to the processor, memory, and USB ports.
Use the datasheets for add-in cards, such as PCI, to determine the overall system power
requirements. The selection of a power supply at the system level is dependent on the system’s
usage model and not necessarily tied to a particular processor clock frequency.
Table 35.
DC Loading Characteristics
DC Current at:
Mode
DC Power
+3.3 V
+5 V
+12 V
-12 V
+5 VSB
Minimum loading
300 W
5A
11 A
19 A
0A
0.34 A (S0)
1.25 A (S3)
Maximum loading
500 W
25 A
27 A
36 A
0.40 A
0.34 A (S0)
1.25 A (S3)
2.10.2
Add-in Board Considerations
The board is designed to provide 2 A (average) of +5 V current for each add-in board. The total
+5 V current draw for add-in boards for the desktop board is as follows: a fully loaded board (all
five expansion slots and the PCI Express x16 slot filled) must not exceed 12 A.
71
Intel Desktop Board D955XBK Technical Product Specification
2.10.3
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 36 lists the current capability of the fan connectors.
Table 36.
Fan Connector Current Capability
Fan Connector
Maximum Available Current
Processor fan
3.0 A
Front chassis fan
1.0 A
Rear chassis fan
1.0 A
Auxiliary rear fan
3.0 A
2.10.4
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 35 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.
•
•
•
•
72
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)
Technical Reference
2.11 Thermal Considerations
This board features a thermal protection circuit in the processor voltage regulator area. This circuit
protects the processor voltage regulator from overheating and damaging the board. The thermal
protection circuit in the processor voltage regulator sensor is triggered at approximately 120 oC.
This trigger will cause the processor to enter a throttling mode (slowing down the processor if it
exceeds its maximum operating temperature) and allow the processor voltage regulator to cool
down.
#
INTEGRATOR’S NOTE
Use a processor heatsink that provides omni-directional airflow (similar to the type shown in
Figure 27) to maintain required airflow across the processor voltage regulator area.
OM16996
Figure 27. Example of a Processor Heatsink for Omni-directional Airflow
CAUTION
When using BIOS Setup program options to increase processor voltage and frequency above the
supported ranges, the temperature in the processor voltage regulator area will rise. This area of
the board (item A in Figure 28) will require increased airflow. Direct airflow over the processor
voltage regulator is crucial to preventing throttling and keeping the processor voltage regulator
area cool. This is particularly important when using liquid cooling.
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.
Figure 28 shows the locations of the localized high temperature zones.
73
Intel Desktop Board D955XBK Technical Product Specification
A
B
D
C
OM17724
Item
A
B
C
D
Description
Processor voltage regulator area
Processor
Intel 82955X MCH
Intel 82801GR ICH7-R
Figure 28. Localized High Temperature Zones
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 2.13.
74
Technical Reference
Table 37 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 37.
Thermal Considerations for Components
Component
Temperature
Processor voltage regulator area
120 oC (under bias)
Intel Pentium 4 processor
For processor case temperature, see processor datasheets and
processor specification updates
Intel 82955X MCH
99 oC (under bias)
Intel 82801GR ICH7-R
110 oC (under bias)
NOTE
For hardware monitoring application software, an alert point of 110 oC is recommended as a
starting point for the processor voltage regulator area.
For information about
Intel Pentium 4 processor datasheets and specification updates
Refer to
Section 1.2, page 15
2.12 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 board is 91425.23
hours.
75
Intel Desktop Board D955XBK Technical Product Specification
2.13 Environmental
Table 38 lists the environmental specifications for the board.
Table 38.
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
Packaged
5 Hz to 40 Hz: 0.015 g² Hz (flat)
20 Hz to 500 Hz: 0.02 g² Hz (flat)
40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz
76
Technical Reference
2.14 Regulatory Compliance
This section describes the board’s compliance with U.S. and international safety and
electromagnetic compatibility (EMC) regulations.
2.14.1
Safety Regulations
Table 39 lists the safety regulations the Desktop Board D955XBK complies with when correctly
installed in a compatible host system.
Table 39.
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)
2.14.2
EMC Regulations
Table 40 lists the EMC regulations the Desktop Board D955XBK complies with when correctly
installed in a compatible host system.
Table 40.
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)
77
Intel Desktop Board D955XBK Technical Product Specification
2.14.2.1
FCC Compliance Statement (USA)
Product Type: D955XBK 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.
2.14.2.2
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.
2.14.3
European Union Declaration of Conformity Statement
We, Intel Corporation, declare under our sole responsibility that the product: Intel® Desktop Board
D955XBK is in conformity with all applicable essential requirements necessary for CE marking,
following the provisions of the European Council Directive 89/336/EEC (EMC Directive) and
Council Directive 73/23/EEC (Safety/Low Voltage Directive).
The product is properly CE marked demonstrating this conformity and is for distribution within all
member states of the EU with no restrictions.
This product follows the provisions of the European Directives 89/336/EEC and 73/23/EEC.
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.
78
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.
2.14.4
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.
79
Intel Desktop Board D955XBK Technical Product Specification
2.14.5
Product Certification Markings (Board Level)
Table 41 lists the board’s product certification markings.
Table 41.
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 D955XBK 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).
V-0 or 94V-0
Lead – Free Certification
Pb-free certification markings are per the JEDEC spec.
Pb-free symbol - PB_FREE_SILK
e1 symbol (specifies the composition of the solder paste) - E1_SILK
2ND Level Interconnect (used until a board is considered Pb-free per the
RoHS definition – This must follow the Pb-free symbol. It is abbreviated
per spec) - 2ND_LVL_INTCT_SILK
260 °C (specifies maximum safe processing temperature) - 260C_SILK
80
Pb
2ND LVL INTCT
260 oC
e1
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
Introduction .................................................................................................................. 81
Resource Configuration ............................................................................................... 82
System Management BIOS (SMBIOS) ........................................................................ 83
Legacy USB Support.................................................................................................... 83
BIOS Updates .............................................................................................................. 84
Boot Options ................................................................................................................ 85
Fast Booting Systems with Intel® Rapid BIOS Boot..................................................... 86
BIOS Security Features ............................................................................................... 87
3.1 Introduction
The BIOS is stored in either a Firmware Hub (FWH) or a Serial Peripheral Interface (SPI) Flash
device and can be updated using a disk-based program. The FWH or the SPI contains the BIOS
Setup program, POST, the PCI auto-configuration utility, and Plug and Play support.
The BIOS displays a message during POST identifying the type of BIOS and a revision code. The
initial production BIOSs are identified as BK95510J.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 board is in configure mode. Section 2.8 on
page 67 shows how to put the board in configure mode.
81
Intel Desktop Board D955XBK Technical Product Specification
Table 42 lists the BIOS Setup program menu features.
Table 42.
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 43 lists the function keys available for menu screens.
Table 43.
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 Resource Configuration
3.2.1
PCI Autoconfiguration
The BIOS automatically configures 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.
3.2.2
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 interface also supports second-generation SATA 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 to PIO Mode 3 or 4, depending
on the capability of the drive. You can override the auto-configuration options by specifying
manual configuration in the BIOS Setup program.
82
Overview of BIOS Features
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.
3.3 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 clock frequency
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.
3.4 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.
Legacy USB support operates as follows:
1. When you apply power to the computer, legacy support is disabled.
2. POST begins.
3. Legacy USB support is enabled by the BIOS allowing you to use a USB keyboard to enter and
configure the BIOS Setup program and the maintenance menu.
4. POST completes.
5. The operating system loads. While the operating system is loading, USB keyboards and mice
are recognized and may be used to configure the operating system.
83
Intel Desktop Board D955XBK Technical Product Specification
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, follow the operating system’s installation
instructions.
3.5 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 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 1.2, page 15
3.5.1
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.
3.5.2
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.
84
For information about
Refer to
The Intel World Wide Web site
Section 1.2, page 15
Overview of BIOS Features
3.6 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.
3.6.1
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.
3.6.2
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.
3.6.3
Booting Without Attached Devices
For use in embedded applications, the BIOS has been designed so that after passing the POST, the
operating system loader is invoked even if the following devices are not present:
•
•
•
3.6.4
Video adapter
Keyboard
Mouse
Changing the Default Boot Device During POST
Pressing the <F10> key during POST causes a boot device menu to be displayed. This menu
displays the list of available boot devices (as set in the BIOS setup program’s Boot Device Priority
Submenu). Table 44 lists the boot device menu options.
Table 44.
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
85
Intel Desktop Board D955XBK Technical Product Specification
3.7 Fast Booting Systems with Intel® Rapid BIOS Boot
These factors affect the amount of time for a system to complete boot process:
•
•
3.7.1
Selecting and configuring peripherals properly
Using an optimized BIOS, such as the Intel® Rapid BIOS
Peripheral Selection and Configuration
The following techniques help reduce system boot time:
•
•
•
•
3.7.2
Choose a hard drive with parameters such as “power-up to data ready” less than eight seconds,
that minimize hard drive startup delays.
Select a CD-ROM drive with a fast initialization rate. This rate can influence POST
execution time.
Eliminate unnecessary add-in adapter features, such as logo displays, screen repaints, or mode
changes in POST. These features may add time to the boot process.
Try different monitors. Some monitors initialize and communicate with the BIOS more
quickly, which enables the system to boot more quickly.
Intel Rapid BIOS Boot
Use of the following BIOS Setup program settings reduces the POST execution time.
In the Boot Menu:
•
•
•
Set the hard disk drive as the first boot device. As a result, the POST does not first seek a
diskette drive, which saves about one second from the POST execution time.
Disable Quiet Boot, which eliminates display of the logo splash screen. This could save several
seconds of painting complex graphic images and changing video modes.
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).
86
Overview of BIOS Features
3.8 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 45 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 45.
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.
87
Intel Desktop Board D955XBK Technical Product Specification
88
4 Error Messages and Beep Codes
What This Chapter Contains
4.1
4.2
4.3
4.4
Speaker........................................................................................................................ 89
BIOS Beep Codes........................................................................................................ 89
BIOS Error Messages .................................................................................................. 89
Port 80h POST Codes ................................................................................................. 90
4.1 Speaker
The board-mounted speaker provides audible error code (beep code) information during POST.
For information about
Refer to
The location of the onboard speaker
Figure 1, page 12
4.2 BIOS Beep Codes
Whenever a recoverable error occurs during POST, the BIOS displays an error message describing
the problem (see Table 46).
Table 46.
Beep Codes
Type
Pattern
Frequency
Memory error
Three long beeps
1280 Hz
Thermal warning
Four alternating beeps:
High tone: 2000 Hz
High tone, low tone, high tone, low tone
Low tone: 1600 Hz
4.3 BIOS Error Messages
Table 47 lists the error messages and provides a brief description of each.
Table 47.
BIOS Error Messages
Error Message
Explanation
CMOS Battery Low
The battery may be losing power. Replace the battery soon.
CMOS Checksum Bad
The CMOS checksum is incorrect. CMOS memory may have
been corrupted. Run Setup to reset values.
Memory Size Decreased
Memory size has decreased since the last boot. If no memory was
removed then memory may be bad.
No Boot Device Available
System did not find a device to boot.
89
Intel Desktop Board D955XBK Technical Product Specification
4.4 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 following tables provide information about the POST codes generated by the BIOS:
•
•
•
Table 48 lists the Port 80h POST code ranges
Table 49 lists the Port 80h POST codes themselves
Table 50 lists the Port 80h POST sequence
NOTE
In the tables listed above, all POST codes and range values are listed in hexadecimal.
Table 48.
Port 80h POST Code Ranges
Range
Category/Subsystem
00 – 0F
Debug codes: Can be used by any PEIM/driver for debug.
10 – 1F
Host Processors: 1F is an unrecoverable CPU error.
20 – 2F
Memory/Chipset: 2F is no memory detected or no useful memory detected.
30 – 3F
Recovery: 3F indicated recovery failure.
40 – 4F
Reserved for future use.
50 – 5F
I/O Busses: PCI, USB, ISA, ATA, etc. 5F is an unrecoverable error. Start with PCI.
60 – 6F
Reserved for future use (for new busses).
70 – 7F
Output Devices: All output consoles. 7F is an unrecoverable error.
80 – 8F
Reserved for future use (new output console codes).
90 – 9F
Input devices: Keyboard/Mouse. 9F is an unrecoverable error.
A0 – AF
Reserved for future use (new input console codes).
B0 – BF
Boot Devices: Includes fixed media and removable media. BF is an unrecoverable error.
C0 – CF
Reserved for future use.
D0 – DF
Boot device selection.
E0 – FF
F0 – FF: FF processor exception.
E0 – EE: Miscellaneous codes. See Table 49.
EF boot/S3: resume failure.
90
Error Messages and Beep Codes
Table 49.
POST Code
Port 80h POST Codes
Description of POST Operation
Host Processor
10
Power-on initialization of the host processor (Boot Strap Processor)
11
Host processor Cache initialization (including APs)
12
Starting Application processor initialization
13
SMM initialization
Chipset
21
Initializing a chipset component
22
Reading SPD from memory DIMMs
23
Detecting presence of memory DIMMs
24
Programming timing parameters in the memory controller and the DIMMs
25
Configuring memory
26
Optimizing memory settings
27
Initializing memory, such as ECC init
28
Testing memory
Memory
PCI Bus
50
Enumerating PCI busses
51
Allocating resources to PCI bus
52
Hot Plug PCI controller initialization
53 – 57
Reserved for PCI Bus
USB
58
Resetting USB bus
59
Reserved for USB
ATA/ATAPI/SATA
5A
Resetting PATA/SATA bus and all devices
5B
Reserved for ATA
SMBus
5C
Resetting SMBUS
5D
Reserved for SMBUS
Local Console
70
Resetting the VGA controller
71
Disabling the VGA controller
72
Enabling the VGA controller
Remote Console
78
Resetting the console controller
79
Disabling the console controller
7A
Enabling the console controller
continued
91
Intel Desktop Board D955XBK Technical Product Specification
Table 49.
POST Code
Port 80h POST Codes (continued)
Description of POST Operation
Keyboard (PS2 or USB)
90
Resetting keyboard
91
Disabling the keyboard
92
Detecting the presence of the keyboard
93
Enabling the keyboard
94
Clearing keyboard input buffer
95
Instructing keyboard controller to run Self Test (PS2 only)
98
Resetting mouse
99
Detecting mouse
9A
Detecting presence of mouse
9B
Enabling mouse
Mouse (PS2 or USB)
Fixed Media
B0
Resetting fixed media
B1
Disabling fixed media
B2
Detecting presence of a fixed media (IDE hard drive detection etc.)
B3
Enabling/configuring a fixed media
Removable media
B8
Resetting removable media
B9
Disabling removable media
BA
Detecting presence of a removable media (IDE, CD-ROM detection, etc.)
BC
Enabling/configuring a removable media
BDS
Dy
Trying boot selection y (y=0 to 15)
E0
Started dispatching PEIMs (emitted on first report of EFI_SW_PC_INIT_BEGIN
EFI_SW_PEI_PC_HANDOFF_TO_NEXT
E2
Permanent memory found.
E1, E3
Reserved for PEI/PEIMs
PEI Core
DXE Core
E4
Entered DXE phase
E5
Started dispatching drivers
E6
Started connecting drivers
continued
92
Error Messages and Beep Codes
Table 49.
POST Code
Port 80h POST Codes (continued)
Description of POST Operation
DXE Drivers
E7
Waiting for user input
E8
Checking password
E9
Entering BIOS setup
EA
TBD – Flash Update
EB
Calling Legacy Option ROMs
EE
TBD – Calling INT 19. One beep unless silent boot is enabled.
EF
TBD – Unrecoverable Boot failure/S3 resume failure
Runtime Phase/EFI OS Boot
F4
Entering Sleep state
F5
Exiting Sleep state
F8
EFI boot service ExitBootServices ( ) has been called
F9
EFI runtime service SetVirtualAddressMap ( ) has been called
FA
EFI runtime service ResetSystem ( ) has been called
30
Crisis Recovery has initiated per User request
31
Crisis Recovery has initiated by software (corrupt flash)
34
Loading recovery capsule
PEIMs/Recovery
35
Handing off control to the recovery capsule
3F
Unable to recover
93
Intel Desktop Board D955XBK Technical Product Specification
Table 50.
94
Typical Port 80h POST Sequence
POST Code
Description
21
Initializing a chipset component
22
Reading SPD from memory DIMMs
23
Detecting presence of memory DIMMs
25
Configuring memory
28
Testing memory
34
Loading recovery capsule
E4
Entered DXE phase
12
Starting Application processor initialization
13
SMM initialization
50
Enumerating PCI busses
51
Allocating resourced to PCI bus
92
Detecting the presence of the keyboard
90
Resetting keyboard
94
Clearing keyboard input buffer
95
Keyboard Self Test
EB
Calling Video BIOS
58
Resetting USB bus
5A
Resetting PATA/SATA bus and all devices
92
Detecting the presence of the keyboard
90
Resetting keyboard
94
Clearing keyboard input buffer
5A
Resetting PATA/SATA bus and all devices
28
Testing memory
90
Resetting keyboard
94
Clearing keyboard input buffer
E7
Waiting for user input
01
INT 19
00
Ready to boot.
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