Intel® Desktop Board
D845MF/D845WR
Technical Product Specification
January 2002
The Intel® Desktop Boards D845MF and D845WR 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 D845MF/D845WR Specification Update.
Order Number: A80144-001
Revision History
Revision Revision History Date
-001 First release of the Intel® Desktop Board D845MF/D845WR Technical
Product Specification.
This product specification applies to only standard Desktop Boards D845MF and D845WR with
BIOS identifier WR84510A.86A.
Changes to this specification will be published in the Intel Desktop Board D845MF/D845WR
Specification Update before being incorporated into a revision of this document.
INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS. EXCEPT AS
PROVIDED IN INTEL’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY
WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE
OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR
PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT, OR OTHER INTELLECTUAL
PROPERTY RIGHT.
Intel Corporation may have patents or pending patent applications, trademarks, copyrights, or other intellectual property
rights that relate to the presented subject matter. The furnishing of documents and other materials and information does
not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other
intellectual property rights.
Intel products are not intended for use in medical, life saving, or life sustaining applications or for any other application in
which the failure of the Intel product could create a situation where personal injury or death may occur.
Intel may make changes to specifications, product descriptions, and plans at any time, without notice.
®
The Intel
the product to deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be
obtained from:
Intel Corporation
P.O. Box 5937
Denver, CO 80217-9808
or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777,
Germany 44-0-1793-421-333, other Countries 708-296-9333.
Intel and Pentium are registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries.
†
Other names and brands may be claimed as the property of others.
Copyright 2002, Intel Corporation. All rights reserved.
Desktop Boards D845MF and D845WR may contain design defects or errors known as errata that may cause
January 2002
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
power and environmental requirements, and the BIOS for Desktop Boards D845MF and D845WR.
It describes the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about Desktop Boards D845MF and
D845WR and their components to the vendors, system integrators, and other engineers and
technicians who need this level of information. It is specifically not intended for general
audiences.
What This Document Contains
Chapter Description
1 A description of the hardware used on Desktop Boards D845MF and D845WR
2 A map of the resources of the boards
3 The features supported by the BIOS Setup program
4 The contents of the BIOS Setup program’s menus and submenus
5 A description of the BIOS error messages, beep codes, and POST codes
Typographical Conventions
This section contains information about the conventions used in this specification. Not all of these
symbols and abbreviations appear in all specifications of this type.
Notes, Cautions, and Warnings
NOTE
✏
Notes call attention to important information.
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 D845MF/D845WR Technical Product Specification
Other Common Notation
# Used after a signal name to identify an active-low signal (such as USBP0#)
(NxnX) When used in the description of a component, N indicates component type, xn are the relative
coordinates of its location on Desktop Boards D845MF and D845WR, and X is the instance of
the particular part at that general location. For example, J5J1 is a connector, located at 5J. It
is the first connector in the 5J area.
GB Gigabyte (1,073,741,824 bytes)
GB/sec Gigabytes per second
KB Kilobyte (1024 bytes)
Kbit Kilobit (1024 bits)
kbits/sec 1000 bits per second
MB Megabyte (1,048,576 bytes)
MB/sec Megabytes per second
Mbit Megabit (1,048,576 bits)
Mbit/sec Megabits per second
xxh An address or data value ending with a lowercase h indicates a hexadecimal value.
x.x V Volts. Voltages are DC unless otherwise specified.
†
This symbol is used to indicate third-party brands and names that are the property of their
respective owners.
iv
Contents
1 Product Description
1.1 Board Differences.......................................................................................................11
1.2 Overview ....................................................................................................................12
1.2.1 Feature Summary ........................................................................................12
1.2.2 Manufacturing Options .................................................................................13
1.2.3 Board Layouts..............................................................................................14
1.2.4 Block Diagram..............................................................................................16
1.3 Online Support ...........................................................................................................17
1.4 Operating System Support .........................................................................................17
1.5 Design Specifications .................................................................................................18
1.6 Processor ...................................................................................................................21
1.7 System Memory .........................................................................................................22
1.8 Intel® 845 Chipset.......................................................................................................24
1.8.1 AGP .............................................................................................................25
1.8.2 USB..............................................................................................................25
1.8.3 IDE Support .................................................................................................26
1.8.4 Real-Time Clock, CMOS SRAM, and Battery...............................................27
®
1.8.5 Intel
1.9 I/O Controller..............................................................................................................27
1.9.1 Serial Ports ..................................................................................................28
1.9.2 Parallel Port..................................................................................................28
1.9.3 Diskette Drive Controller ..............................................................................28
1.9.4 Keyboard and Mouse Interface ....................................................................29
1.9.5 Infrared Support ...........................................................................................29
1.10 Audio Subsystem........................................................................................................30
1.10.1 Audio Connectors.........................................................................................32
1.10.2 Audio Subsystem Software ..........................................................................33
1.11 ISA Subsystem (Optional) ..........................................................................................33
1.12 LAN Subsystem (Optional) .........................................................................................33
1.12.1 Intel® 82562ET Platform LAN Connect Device.............................................34
1.12.2 RJ-45 LAN Connector with Integrated LEDs ................................................34
1.12.3 LAN Subsystem Software ............................................................................34
1.13 Hardware Management Subsystem............................................................................35
1.13.1 Hardware Monitoring....................................................................................35
1.13.2 Fan Monitoring .............................................................................................35
1.13.3 Chassis Intrusion and Detection...................................................................35
1.14 Power Management ...................................................................................................36
1.14.1 Software Support .........................................................................................36
1.14.2 Hardware Support ........................................................................................40
82802AB 4 Mbit Firmware Hub (FWH) ...............................................27
v
Intel Desktop Board D845MF/D845WR Technical Product Specification
2 Technical Reference
2.1 Introduction.................................................................................................................45
2.2 Memory Map ..............................................................................................................45
2.3 I/O Map .....................................................................................................................46
2.4 DMA Channels ...........................................................................................................48
2.5 PCI Configuration Space Map ....................................................................................48
2.6 Interrupts ....................................................................................................................49
2.7 PCI Interrupt Routing Map..........................................................................................50
2.8 Connectors.................................................................................................................52
2.8.1 Back Panel Connectors................................................................................53
2.8.2 Internal I/O Connectors ................................................................................57
2.8.3 External I/O Connectors...............................................................................71
2.9 Jumper Blocks............................................................................................................74
2.9.1 Front Panel Audio Connector/Jumper Block.................................................75
2.9.2 BIOS Setup Configuration Jumper Block......................................................76
2.10 Mechanical Considerations.........................................................................................77
2.10.1 D845MF Form Factor...................................................................................77
2.10.2 D845WR Form Factor ..................................................................................78
2.10.3 I/O Shield .....................................................................................................79
2.11 Electrical Considerations ............................................................................................79
2.11.1 Power Consumption.....................................................................................79
2.11.2 Add-in Board Considerations........................................................................80
2.11.3 Standby Current Requirements....................................................................80
2.11.4 Fan Connector Current Capability ................................................................81
2.11.5 Power Supply Considerations ......................................................................82
2.12 Thermal Considerations..............................................................................................82
2.13 Reliability ....................................................................................................................84
2.14 Environmental ............................................................................................................84
2.15 Regulatory Compliance ..............................................................................................85
2.15.1 Safety Regulations.......................................................................................85
2.15.2 EMC Regulations .........................................................................................85
2.15.3 Product Certification Markings (Board Level) ...............................................86
3 Overview of BIOS Features
3.1 Introduction.................................................................................................................87
3.2 BIOS Flash Memory Organization ..............................................................................88
3.3 Resource Configuration..............................................................................................88
3.3.1 PCI Autoconfiguration ..................................................................................88
3.3.2 PCI IDE Support...........................................................................................88
3.4 System Management BIOS (SMBIOS).......................................................................89
3.5 Legacy USB Support..................................................................................................89
3.6 BIOS Updates ............................................................................................................90
3.6.1 Language Support........................................................................................91
3.6.2 Custom Splash Screen.................................................................................91
3.7 Recovering BIOS Data ...............................................................................................91
vi
3.8 Boot Options...............................................................................................................92
3.8.1 CD-ROM and Network Boot .........................................................................92
3.8.2 Booting Without Attached Devices ...............................................................92
3.9 Fast Booting Systems with Intel® Rapid BIOS Boot....................................................92
3.9.1 Peripheral Selection and Configuration ........................................................92
3.9.2 Intel Rapid BIOS Boot ..................................................................................93
3.10 BIOS Security Features..............................................................................................94
4 BIOS Setup Program
4.1 Introduction.................................................................................................................95
4.2 Maintenance Menu.....................................................................................................96
4.2.1 Extended Configuration Submenu................................................................97
4.3 Main Menu..................................................................................................................98
4.4 Advanced Menu..........................................................................................................99
4.4.1 PCI Configuration Submenu.......................................................................100
4.4.2 Boot Configuration Submenu .....................................................................101
4.4.3 Peripheral Configuration Submenu.............................................................102
4.4.4 IDE Configuration Submenu.......................................................................105
4.4.5 Diskette Configuration Submenu................................................................108
4.4.6 Event Log Configuration Submenu.............................................................109
4.4.7 Video Configuration Submenu....................................................................110
4.5 Security Menu ..........................................................................................................111
4.6 Power Menu .............................................................................................................112
4.6.1 APM Submenu...........................................................................................113
4.6.2 ACPI Submenu ..........................................................................................113
4.7 Boot Menu................................................................................................................114
4.7.1 Boot Device Priority Submenu....................................................................115
4.7.2 Hard Disk Drives Submenu ........................................................................116
4.7.3 Removable Devices Submenu ...................................................................116
4.7.4 ATAPI CD-ROM Drives Submenu..............................................................117
4.8 Exit Menu .................................................................................................................117
Contents
5 Error Messages and Beep Codes
5.1 BIOS Error Messages...............................................................................................119
5.2 Port 80h POST Codes..............................................................................................121
5.3 Bus Initialization Checkpoints ...................................................................................125
5.4 Speaker ...................................................................................................................126
5.5 BIOS Beep Codes ....................................................................................................126
vii
Intel Desktop Board D845MF/D845WR Technical Product Specification
Figures
1. Desktop Board D845MF Components........................................................................14
2. Desktop Board D845WR Components .......................................................................15
3. Block Diagram ............................................................................................................16
4. Intel 845 Chipset Block Diagram.................................................................................24
5. USB Port Configuration ..............................................................................................25
6. AD1885 Audio Subsystem Block Diagram..................................................................31
7. CS4201 Audio Subsystem Block Diagram..................................................................31
8. Using the Wake on LAN Technology Connector.........................................................42
9. Location of the Standby Power Indicator LED ............................................................43
10. Back Panel Connectors ..............................................................................................53
11. Audio Connectors .......................................................................................................58
12. Power and Hardware Control Connectors ..................................................................60
13. Desktop Board D845MF Add-in Board and Peripheral Interface Connectors..............63
14. Desktop Board D845WR Add-in Board and Peripheral Interface Connectors.............64
15. External I/O Connectors .............................................................................................71
16. Location of the Jumper Blocks....................................................................................74
17. Desktop Board D845MF Dimensions..........................................................................77
18. Desktop Board D845WR Dimensions.........................................................................78
19. Localized High Temperature Zones............................................................................83
Tables
1. Summary of Board Differences...................................................................................11
2. Feature Summary.......................................................................................................12
3. Manufacturing Options ...............................................................................................13
4. Specifications .............................................................................................................18
5. Supported Processors ................................................................................................21
6. Supported Memory Configurations .............................................................................23
7. LAN Connector LED States........................................................................................34
8. Effects of Pressing the Power Switch .........................................................................37
9. Power States and Targeted System Power ................................................................38
10. Wake-up Devices and Events.....................................................................................39
11. Fan Connector Function/Operation.............................................................................41
12. System Memory Map..................................................................................................45
13. I/O Map ......................................................................................................................46
14. DMA Channels ...........................................................................................................48
15. PCI Configuration Space Map ....................................................................................48
16. Interrupts ....................................................................................................................49
17. PCI Interrupt Routing Map..........................................................................................51
18. PS/2 Mouse/Keyboard Connector ..............................................................................54
19. Parallel Port Connector...............................................................................................54
20. Serial Port Connectors ...............................................................................................54
21. MIDI/Game Port Connector ........................................................................................55
22. Audio Line Out/Front Out Connector ..........................................................................55
23. Audio Line In/Rear Out Connector..............................................................................55
24. Mic In/Center and LFE Out Connector........................................................................55
viii
Contents
25. LAN Connector (Optional) ..........................................................................................56
26. USB Connectors.........................................................................................................56
27. Auxiliary Line In Connector.........................................................................................59
28. Telephony Connector .................................................................................................59
29. ATAPI CD-ROM Connector ........................................................................................59
30. Front Panel Audio Connector .....................................................................................59
31. Rear Chassis Fan Connector .....................................................................................61
32. Processor Fan Connector...........................................................................................61
33. Wake on Ring Connector............................................................................................61
34. Main Power Connector...............................................................................................61
35. Front Chassis Fan Connector.....................................................................................61
36. Wake on LAN Technology Connector.........................................................................62
37. Chassis Intrusion Connector.......................................................................................62
38. ATX12V Power Connector..........................................................................................62
39. ISA Bus Connector (Optional) ....................................................................................65
40. PCI Bus Connectors...................................................................................................67
41. AGP Connector ..........................................................................................................68
42. PCI IDE Connectors ...................................................................................................69
43. Diskette Drive Connector............................................................................................70
44. Front Panel USB Connector .......................................................................................72
45. Front Panel Connector ...............................................................................................72
46. States for a One-Color Power LED.............................................................................73
47. States for a Two-Color Power LED.............................................................................73
48. Front Panel Audio Connector/Jumper Block...............................................................75
49. BIOS Setup Configuration Jumper Settings................................................................76
50. Power Usage..............................................................................................................79
51. Standby Current Requirements ..................................................................................81
52. Fan Connector Current Capability ..............................................................................81
53. Thermal Considerations for Components ...................................................................83
54. Desktop Board D845MF/D845WR Environmental Specifications ...............................84
55. Safety Regulations .....................................................................................................85
56. EMC Regulations........................................................................................................85
57. Supervisor and User Password Functions..................................................................94
58. BIOS Setup Program Menu Bar .................................................................................95
59. BIOS Setup Program Function Keys ..........................................................................96
60. Maintenance Menu.....................................................................................................96
61. Extended Configuration Submenu..............................................................................97
62. Main Menu..................................................................................................................98
63. Advanced Menu..........................................................................................................99
64. PCI Configuration Submenu.....................................................................................100
65. Boot Configuration Submenu....................................................................................101
66. Peripheral Configuration Submenu...........................................................................102
67. IDE Configuration Submenu.....................................................................................105
68. Primary/Secondary IDE Master/Slave Submenus.....................................................106
69. Diskette Configuration Submenu ..............................................................................108
70. Event Log Configuration Submenu...........................................................................109
71. Video Configuration Submenu..................................................................................110
72. Security Menu ..........................................................................................................111
ix
Intel Desktop Board D845MF/D845WR Technical Product Specification
73. Power Menu .............................................................................................................112
74. APM Submenu .........................................................................................................113
75. ACPI Submenu.........................................................................................................113
76. Boot Menu................................................................................................................114
77. Boot Device Priority Submenu..................................................................................115
78. Hard Disk Drives Submenu ......................................................................................116
79. Removable Devices Submenu..................................................................................116
80. ATAPI CD-ROM Drives Submenu ............................................................................117
81. Exit Menu .................................................................................................................117
82. BIOS Error Messages...............................................................................................119
83. Uncompressed INIT Code Checkpoints....................................................................121
84. Boot Block Recovery Code Checkpoints ..................................................................121
85. Runtime Code Uncompressed in F000 Shadow RAM ..............................................122
86. Bus Initialization Checkpoints ...................................................................................125
87. Upper Nibble High Byte Functions............................................................................125
88. Lower Nibble High Byte Functions............................................................................126
89. Beep Codes..............................................................................................................127
x
1 Product Description
What This Chapter Contains
1.1 Board Differences.......................................................................................................11
1.2 Overview ....................................................................................................................12
1.3 Online Support ...........................................................................................................17
1.4 Operating System Support .........................................................................................17
1.5 Design Specifications .................................................................................................18
1.6 Processor ...................................................................................................................21
1.7 System Memory .........................................................................................................22
1.8 Intel® 845 Chipset.......................................................................................................24
1.9 I/O Controller..............................................................................................................27
1.10 Audio Subsystem........................................................................................................30
1.11 ISA Subsystem (Optional) ..........................................................................................33
1.12 LAN Subsystem (Optional) .........................................................................................33
1.13 Hardware Management Subsystem............................................................................35
1.14 Power Management ...................................................................................................36
1.1 Board Differences
This TPS describes Desktop Boards D845MF and D845WR. The boards are identical with the
exception of the items listed in Table 1.
Table 1. Summary of Board Differences
D845MF
D845WR
NOTE
✏
Most of the illustrations in this document show only Desktop Board D845WR. When there are
significant differences between the two boards, illustrations of both boards are provided.
• ATX form factor (12.00 inches by 8.23 inches)
• Six PCI bus connectors
• microATX form factor (9.60 inches by 8.23 inches)
• Three PCI bus connectors
11
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.2 Overview
1.2.1 Feature Summary
Table 2 summarizes the major features of Desktop Boards D845MF and D845WR.
Table 2. Feature Summary
Form Factor
Processor
Memory
Chipset
Video
I/O Control
Peripheral
Interfaces
Expansion
Capabilities
Hardware
Monitoring
BIOS
D845MF: ATX (12.00 inches by 8.23 inches)
D845WR: microATX (9.60 inches by 8.23 inches)
• Support for an Intel
• 400 MHz system bus
• Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for single-sided or double-sided DIMMs (DDR 200 and DDR 266)
• Support for up to 2 GB system memory
®
845 Chipset, consisting of:
Intel
®
• Intel
• Intel
• Intel
Accelerated Graphics Port (AGP) connector supporting 1.5 V 4X AGP cards
SMSC LPC47M192 LPC bus I/O controller
• Up to four USB 1.1 ports
• Two serial ports
• One parallel port
• Two IDE interfaces with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2
• MIDI/game port
• D845MF: Six PCI bus add-in card connectors (SMBus routed to PCI bus
• D845WR: Three PCI bus add-in card connectors (SMBus routed to PCI bus
See Section 1.2.2, page 13 for information about expansion capability
manufacturing options
• Voltage sense to detect out of range power supply voltages
• Thermal sense to detect out of range thermal values
• Two fan sense inputs used to monitor fan activity
• Intel/AMI BIOS (resident in the Intel 82802AB 4 Mbit FWH)
• Support for Advanced Power Management (APM), Advanced Configuration and
82845 Memory Controller Hub (MCH)
®
82801BA I/O Controller Hub (ICH2)
®
82802AB 4 Mbit Firmware Hub (FWH)
†
keyboard and mouse ports
connector 1)
connector 1)
Power Interface (ACPI), Plug and Play, and SMBIOS
®
Pentium® 4 processor in a µPGA478 socket
continued
12
Product Description
Table 2. Feature Summary (continued)
Instantly Available
PC Technology
• Support for PCI Local Bus Specification Revision 2.2
• Suspend to RAM support
• Wake on PME#, PS/2 devices, and USB ports
For information about Refer to
The board’s compliance level with APM, ACPI, Plug and Play, and SMBIOS. Section 1.5, page 18
1.2.2 Manufacturing Options
Table 3 describes the manufacturing options for Desktop Boards D845MF and D845WR. Not
every manufacturing option is available in all marketing channels. Please contact your Intel
representative to determine which manufacturing options are available to you.
Table 3. Manufacturing Options
Audio
Analog Devices
Cirrus CS4201
Expansion
Capabilities
LAN
For information about Refer to
Available configurations for Desktop Boards D845MF and D845WR Section 1.3, page 17
The board’s Audio Codec ’97 (AC ’97) compatible audio subsystem includes one of
two codec options:
Supports two-channel audio
AD1885 codec
Supports six-channel audio
codec
One ISA bus connector
®
Intel
82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device
13
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.2.3 Board Layouts
Figure 1 shows the location of the major components on Desktop Board D845MF.
A
B
C
T
S
R
A Audio codec K IDE connectors
B Intel 82562ET PLC Device (optional) L Diskette drive connector
C Back panel connectors M Intel 82802AB 4 Mbit Firmware Hub (FWH)
D +12 V power connector (ATX12V) N Front panel connector
E Intel 82845 Memory Controller Hub (MCH) O Intel 82801BA I/O Controller Hub (ICH2)
F µPGA478 processor socket P Battery
G AGP connector Q Speaker
H DIMM sockets R LPC-to-ISA bridge (optional)
I I/O controller S PCI bus add-in card connectors
J Main power connector T ISA bus connector (optional)
NOPQ M
L
IJK
OM13230
D
E
F
G
H
14
Figure 1. Desktop Board D845MF Components
Product Description
Figure 2 shows the location of the major components on Desktop Board D845WR.
A
B
C
T
S
R
Q
NOP M
A Audio codec K IDE connectors
B Intel 82562ET PLC Device (optional) L Diskette drive connector
C Back panel connectors M Intel 82802AB 4 Mbit Firmware Hub (FWH)
D +12 V power connector (ATX12V) N Front panel connector
E Intel 82845 Memory Controller Hub (MCH) O Battery (vertical)
F µPGA478 processor socket P LPC-to-ISA bridge (optional)
G AGP connector Q Speaker
H DIMM sockets R Intel 82801BA I/O Controller Hub (ICH2)
I I/O controller S PCI bus add-in card connectors
J Main power connector T ISA bus connector (optional)
L
IJK
D
E
F
G
H
OM13218
Figure 2. Desktop Board D845WR Components
15
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.2.4 Block Diagram
Figure 3 is a block diagram of the major functional areas of the standard Desktop Boards D845MF
and D845WR.
Primary/
Secondary IDE
µPGA478
Processor Socket
AGP
Interface
= connector or socket
Back Panel
USB Ports (2)
Front Panel
USB Ports (2)
System Bus
(400 MHz)
82845 Memory
Controller Hub
(MCH)
UDMA 33
and
ATA-66/100
LPC I/O
Controller
(Integrated
Hardware
Monitor)
USB
Optional
LPC
Bus
845 Chipset
AHA
Bus
82801BA
I/O Controller Hub
(ICH2)
Serial Ports
Parallel Port
PS/2 Mouse
PS/2 Keyboard
MIDI/Game Port
LPC-to-ISA
Bridge
Diskette Drive
Connector
ISA
Slot
82802AB 4 Mbit
Firmware Hub
(FWH)
4X AGP
Connector
(1.5 V only)
DIMM Banks (2)
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
PCI Slot 5
PCI Slot 6
DDR SDRAM
Bus
D845MF
Only
SMBus
PCI Bus
Figure 3. Block Diagram
AC Link
CSMA/CD
Unit Interface
AC ’97
Audio Codec
Optional
Connector
Physical
Layer
Interface
LAN
OM13249
16
1.3 Online Support
To find information about… Visit this World Wide Web site:
Desktop Boards D845MF and D845WR
under “Product Info”
Available configurations for Desktop
Board D845MF
Available configurations for Desktop
Board D845WR
Processor data sheets http://www.intel.com/design/litcentr
ICH2 addressing http://developer.intel.com/design/chipsets/datashts
Custom splash screens http://www.intel.com/design/motherbd/gen_indx.htm
Audio software and utilities http://www.intel.com/design/motherbd
LAN software and drivers http://www.intel.com/design/motherbd
http://www.intel.com/design/motherbd
http://developer.intel.com/design/motherbd/mf/mf_available.htm
http://developer.intel.com/design/motherbd/wr/wr_available.htm
1.4 Operating System Support
Product Description
Desktop Boards D845MF and D845WR support drivers for all of the onboard hardware and
subsystems under the following operating systems:
†
• Microsoft Windows
98 SE
• Windows ME
†
• Windows NT
4.0
• Windows 2000
• Windows XP
For information about Refer to
Supported drivers Section 1.3
NOTE
✏
Third party vendors may offer other drivers.
17
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.5 Design Specifications
Table 4 lists the specifications applicable to Desktop Boards D845MF and D845WR.
Table 4. Specifications
Reference
Name
AC ’97 Audio Codec ’97 Revision 2.2,
ACPI Advanced Configuration
AGP Accelerated Graphics Port
AMI BIOS AMIBIOS Desktop Core 7.0 AMIBIOS 7.0,
APM Advanced Power
ATA/
ATAPI-5
ATX ATX Specification Version 2.03,
ATX12V ATX/ATX12V Power
BIS Boot Integrity Services Version 1.0 for WfM 2.0,
Specification
Title
and Power Interface
Specification
Interface Specification
Management BIOS
Interface Specification
Information Technology-AT
Attachment with Packet
Interface - 5
(ATA/ATAPI-5)
Supply Design Guide
Version, Revision Date,
and Ownership
September 2000,
Intel Corporation.
Version 2.0,
July 27, 2000,
Compaq Computer
Corporation,
Intel Corporation,
Microsoft Corporation,
Phoenix Technologies
Limited, and
Toshiba Corporation.
Revision 2.0,
May 4, 1998,
Intel Corporation.
August 8, 2001,
American Megatrends, Inc.
Version 1.2,
February 1996,
Intel Corporation and
Microsoft Corporation.
Revision 3,
February 29, 2000,
Contact: T13 Chair,
Seagate Technology.
December 1998,
Intel Corporation.
Version 1.1,
August 2000,
Intel Corporation.
August 1999,
Intel Corporation.
The information is
available from…
ftp://download.intel.com/ial/
scalableplatforms/ac97r22.pdf
http://www.acpi.info/spec.htm
http://www.agpforum.org/
specs_specs.htm
http://www.ami.com/support/
doc/amibiosdesktop.pdf
http://www.microsoft.com/
hwdev/busbios/amp_12.htm
http://www.t13.org
http://www.formfactors.org/
developer/specs/atx/
atxspecs.htm
http://www.formfactors.org/
developer/specs/atx/
atxspecs.htm
http://developer.intel.com/
design/security/bis/
bisfaq.htm
continued
18
Table 4. Specifications (continued)
Reference
Name
DDR
SDRAM
EPP IEEE Std 1284.1-1997
El Torito Bootable CD-ROM
Front Panel Front Panel I/O
IrDA† Serial Infrared Physical
LPC Low Pin Count Interface
MicroATX microATX Motherboard
PCI PCI Local Bus
PCI Bus Power
Plug and
Play
Specification
Title
Double Data Rate (DDR)
SDRAM Specification
Design Specification for
a 184 Pin DDR
Unbuffered DIMM
®
JEDEC DDR
Intel
200/266 Unbuffered
DIMM Specification
Addendum
(Enhanced Parallel Port)
Format Specification
Connectivity Design
Guide
Layer Link Specification
Specification
Interface Specification
Specification
Management Interface
Specification
Plug and Play BIOS
Specification
Version, Revision Date
and Ownership
Version 1.0,
June 2000,
JEDEC Solid State Technology
Association.
Revision 1.0,
June 2000,
JEDEC Solid State Technology
Association.
Revision 0.9,
September 27, 2001,
Intel Corporation.
Version 1.7,
1997,
Institute of Electrical and
Electronic Engineers.
Version 1.0,
January 25, 1995,
Phoenix Technologies Limited
and International Business
Machines Corporation.
Version 1.0,
October 2000,
Intel Corporation.
Version 1.0,
October 17, 1995,
Infrared Data Association.
Revision 1.0,
September 29, 1997,
Intel Corporation.
Version 1.0,
December 1997,
Intel Corporation.
Revision 2.2,
December 18, 1998,
PCI Special Interest Group.
Revision 1.1,
December 18, 1998,
PCI Special Interest Group.
Version 1.0a,
May 5, 1994,
Compaq Computer Corporation,
Phoenix Technologies Limited,
and Intel Corporation.
Product Description
The information is
available from…
http://www.jedec.org/
http://www.jedec.org/
http://developer.intel.com/
technology/memory/
index.htm
http://standards.ieee.org/
reading/ieee/std_public/
description/busarch/
1284.1-1997_desc.html
http://www.phoenix.com/
PlatSS/products/specs.html
http://www.formfactors.org/
formfactors/
front_panel_io.htm
http://www.irda.org/
standards/pubs/IrData.zip
http://www.intel.com/
design/chipsets/industry/
lpc.htm
http://www.formfactors.org/
developer/specs/microatx/
microatxspecs.htm
http://www.pcisig.com/
specifications
http://www.pcisig.com/
specifications
http://www.microsoft.com/
hwdev/respec/
pnpspecs.htm
continued
19
Intel Desktop Board D845MF/D845WR Technical Product Specification
Table 4. Specifications (continued)
Reference
Name
PXE Preboot Execution
SFX SFX/SFX12V Power
SMBIOS System Management
UHCI Universal Host Controller
USB Universal Serial Bus
WfM Wired for Management
Specification
Title
Environment
Supply Design Guide
BIOS
Interface Design Guide
Specification
Baseline
Version, Revision Date
and Ownership
Version 2.1,
September 20, 1999,
Intel Corporation.
Version 2.0,
May 2001,
Intel Corporation.
Version 2.3.1,
March 16, 1999,
American Megatrends
Incorporated,
Award Software International
Incorporated,
Compaq Computer Corporation,
Dell Computer Corporation,
Hewlett-Packard Company,
Intel Corporation,
International Business Machines
Corporation,
Phoenix Technologies Limited,
and SystemSoft Corporation.
Revision 1.1,
March 1996,
Intel Corporation.
Revision 1.1,
September 23, 1998,
Compaq Computer Corporation,
Intel Corporation,
Microsoft Corporation, and
NEC Corporation.
Version 2.0,
December 18, 1998,
Intel Corporation.
The information is
available from…
ftp://download.intel.com/ial/
wfm/pxespec.pdf
http://www.formfactors.org/
developer/specs/sfx/
sfx12v.pdf
http://www.dmtf.org/
download/standards/
DSP0119.pdf
http://www.usb.org/
developers/docs.html
http://www.usb.org/
developers/docs.html
http://developer.intel.com/
ial/WfM/wfmspecs.htm
20
Product Description
1.6 Processor
CAUTION
Use only the processors listed below. Use of unsupported processors can damage the board, the
processor, and the power supply. See the Intel
Update for the most up-to-date list of supported processors for these boards.
Desktop Boards D845MF and D845WR support a single Pentium 4 processor (in a µPGA478
socket) with a system bus of 400 MHz. Desktop Boards D845MF and D845WR support the
processors listed in Table 5. All supported onboard memory can be cached, up to the cachability
limit of the processor. See the processor’s data sheet for cachability limits.
Table 5. Supported Processors
Type Designation System Bus L2 Cache Size
Pentium 4 processor 1.5, 1.6, 1.7, 1.8, 1.9,
and 2.0 GHz
®
Desktop Board D845MF/D845WR Specification
400 MHz 256 KB
NOTE
✏
Use only ATX12V- or SFX12V-compliant power supplies with Desktop Boards D845MF and
D845WR. ATX12V and SFX12V power supplies have an additional power lead that provides
required supplemental power for the Intel Pentium 4 processor. Always connect the 20-pin and
4-pin leads from the ATX12V and SFX12V power supplies to the corresponding connectors on
Desktop Boards D845MF and D845WR, otherwise the board will not boot.
Do not use a standard ATX power supply. The board will not boot with a standard ATX power
supply.
For information about Refer to
Processor support Section 1.3, page 17
Processor usage Section 1.3, page 17
Power supply connectors Section 2.8.2.3, page 60
21
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.7 System Memory
Desktop Boards D845MF and D845WR both have two DIMM sockets and support the following
memory features:
• 2.5 V (only) 184-pin DDR SDRAM DIMMs with gold-plated contacts
• Unbuffered single-sided or double-sided DIMMs
• Maximum total system memory: 2 GB; minimum total system memory: 64 MB
• 200/266 MHz DDR SDRAM DIMMs only
• Serial Presence Detect (SPD)
• Suspend to RAM
• Non-ECC and ECC DIMMs
NOTE
✏
Remove the AGP video card before installing or upgrading memory to avoid interference with the
memory retention mechanism.
NOTE
✏
Desktop Boards D845MF and D845WR have been designed to support DIMMs based on 512 Mbit
technology for a maximum onboard capacity of up to 2 GB, but this technology has not been
validated on this board. Please refer to the following Intel web sites for the latest lists of tested
memory.
For Desktop Board D845MF:
http://developer.intel.com/design/motherbd/mf/mf_mem.htm
For Desktop Board D845WR:
http://developer.intel.com/design/motherbd/wr/wr_mem.htm
NOTE
✏
To be fully compliant with all applicable DDR SDRAM memory specifications, the board should be
populated with DIMMs that support the Serial Presence Detect (SPD) data structure. This allows
the BIOS to read the SPD data and program the chipset to accurately configure memory settings
for optimum performance. 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.
NOTE
✏
For ECC functionality, all installed DIMMs must be ECC. If both ECC and non-ECC DIMMs are
used, ECC will not function.
For information about Refer to
Obtaining DDR SDRAM specifications Section 1.5, page 18
22
Product Description
Table 6 lists the supported DIMM configurations.
Table 6. Supported Memory Configurations
DIMM
Capacity
Number of
(Note 1)
Sides
DDR SDRAM
Density
64 MB SS 64 Mbit 8 M x 8/empty 8
64 MB SS 128 Mbit 8 M x 16/empty 4
96 MB DS 64 Mbit 8 M x 8/4 M x 16 12
96 MB DS 128/64 Mbit 8 M x 16/4 M x 16 8
128 MB DS 64 Mbit 8 M x 8/8 M x 8 16
128 MB DS 128 Mbit 8 M x 16/8 M x 16 8
128 MB SS 128 Mbit 16 M x 8/empty 8
128 MB SS 256 Mbit 16 M x 16/empty 4
192 MB DS 128 Mbit 16 M x 8/8 M x 16 12
192 MB DS 128/64 Mbit 16 M x 8/8 M x 8 16
256 MB DS 128 Mbit 16 M x 8/16 M x 8 16
256 MB DS 256 Mbit 16 M x 16/16 M x 16 8
256 MB SS 256 Mbit 32 M x 8/empty 8
512 MB DS 256 Mbit 32 M x 8/32 M x 8 16
Notes:
1. In the second column, “DS” refers to double-sided memory modules (containing two rows of DDR SDRAM) and “SS”
refers to single-sided memory modules (containing one row of DDR SDRAM).
2. If the number of DDR SDRAM devices is greater than nine, the DIMM will be double sided.
3. Front side population/back side population indicated for DDR SDRAM density and DDR SDRAM organization.
DDR SDRAM Organization
Front-side/Back-side
Number of DDR
SDRAM Devices
(Notes 2 and 3)
(Notes 2 and 3)
(Note 2)
(Notes 2 and 3)
(Notes 2 and 3)
(Notes 2 and 3)
(Notes 2 and 3)
(Notes 2 and 3)
(Notes 2 and 3)
23
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.8 Intel® 845 Chipset
The Intel 845 chipset consists of the following devices:
• Intel 82845 Memory Controller Hub (MCH) with Accelerated Hub Architecture (AHA) bus
• Intel 82801BA I/O Controller Hub (ICH2) with AHA bus
• Intel 82802AB Firmware Hub (FWH)
The MCH is a centralized controller for the system bus, the memory bus, the AGP bus, and the
Accelerated Hub Architecture interface. The ICH2 is a centralized controller for the board’s I/O
paths. The FWH provides the nonvolatile storage of the BIOS. This component combination
provides the chipset interfaces as shown in Figure 4.
UDMA 33
ATA-66/100
System Bus
Network
USB
845 Chipset
82845
Memory Controller
Hub (MCH)
DDR SDRAM
AGP
Interface
AHA
Bus
Bus
82801BA
I/O Controller Hub
(ICH2)
82802AB 4 Mbit
Firmware Hub
(FWH)
LPC Bus
AC LinkPCI BusSMBus
OM13069
Figure 4. Intel 845 Chipset Block Diagram
For information about Refer to
The Intel 845 chipset http://developer.intel.com
Resources used by the chipset Chapter 2
24
Product Description
1.8.1 AGP
The AGP connector supports AGP add-in cards with 1.5 V Switching Voltage Level (SVL).
Legacy 3.3 V AGP cards are not supported.
NOTE
✏
The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy 3.3 V
AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V AGP cards.
For information about Refer to
The location of the AGP connector Figure 1, page 14
The signal names of the AGP connector Table 41, page 68
Obtaining the Accelerated Graphics Port Interface Specification Section 1.5, page 18
1.8.2 USB
The boards’ onboard ICH2 USB hub supports four USB 1.1 ports, as shown in Figure 5. For more
than four USB devices, an external hub can be connected to any of the ports.
Back panel USB connectors
adjacent to the audio connectors
Front panel USB
connectors
✏
NOTE
82801BA
I/O Controller Hub
(ICH2)
USB
USB
Figure 5. USB Port Configuration
USB ports (2)
USB ports (2)
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 10, page 53
The signal names of the back panel USB connectors Section 2.8.1, page 54
The location of the front panel USB connector Figure 15, page 71
The signal names of the front panel USB connector Table 44, page 72
The front panel, UHCI, and USB specifications Section 1.5, page 18
OM13250
25
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.8.3 IDE Support
1.8.3.1 IDE Interfaces
The ICH2’s IDE controller has two independent bus-mastering IDE interfaces that can be
independently enabled. The IDE interfaces support the following modes:
• Programmed I/O (PIO): processor controls data transfer.
• 8237-style DMA: DMA offloads the processor, supporting transfer rates of up to 16 MB/sec.
• Ultra DMA: DMA protocol on IDE bus supporting host and target throttling and transfer rates
of up to 33 MB/sec.
• ATA-66: DMA protocol on IDE bus supporting host and target throttling and transfer rates of
up to 66 MB/sec. ATA-66 protocol is similar to Ultra DMA and is device driver compatible.
• ATA-100: DMA protocol on IDE bus allows host and target throttling. The ICH2’s ATA-100
logic can achieve read transfer rates up to 100 MB/sec and write transfer rates up to 88 MB/sec.
✏ NOTE
ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections,
noise, and inductive coupling.
The IDE interfaces also support ATAPI devices (such as CD-ROM drives) and ATA devices using
the transfer modes listed in Section 4.4.4.1 on page 106.
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.
Desktop Boards D845MF and D845WR support Laser Servo (LS-120) diskette technology through
the IDE interfaces. An LS-120 drive can be configured as a boot device by setting the BIOS Setup
program’s Boot menu to one of the following:
• ATAPI Removable Media Device – Floppy Disk Drive (ARMD-FDD)
• ATAPI Removable Media Device – Hard Disk Drive (ARMD-HDD)
For information about Refer to
The location of the IDE connectors Figure 13, page 63
The signal names of the IDE connectors Table 42, page 69
BIOS Setup program’s Boot menu Table 76, page 114
26
Product Description
1.8.4 Real-Time Clock, CMOS SRAM, and Battery
The real-time clock provides a time-of-day clock and a multicentury calendar with alarm features.
The real-time clock supports 256 bytes of battery-backed CMOS SRAM in two banks that are
reserved for BIOS use.
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.
The time, date, and CMOS values can be specified in the BIOS Setup program. The CMOS values
can be returned to their defaults by using the BIOS Setup program.
✏ NOTE
If the battery and AC power fail, custom defaults, if previously saved, will be loaded into CMOS
RAM at power-on.
®
1.8.5 Intel
82802AB 4 Mbit Firmware Hub (FWH)
The FWH provides the following:
• System BIOS program
• Logic that enables protection for storing and updating of platform information
1.9 I/O Controller
The SMSC LPC47M192 I/O controller provides the following features:
• Hardware monitor support (refer to Section 1.14.2 on page 40)
• Two serial ports
• One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
• Serial IRQ interface compatible with serialized IRQ support for PCI systems
• PS/2-style mouse and keyboard interfaces
• Interface for one 1.2 MB, 1.44 MB, or 2.88 MB diskette drive
• Intelligent power management, including a programmable wake-up event interface
• PCI power management support
• Fan Control
Two fan tachometer inputs
Two PWM fan speed control outputs
• Game port and MPU-401 MIDI support
• Infrared port (IrDA 1.0 compliant)
The BIOS Setup program provides configuration options for the I/O controller.
For information about Refer to
SMSC LPC47M192 I/O controller http://www.smsc.com
27
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.9.1 Serial Ports
Desktop Boards D845MF and D845WR have two serial port connectors. The serial ports are
located on the back panel. The serial ports’ NS16C550-compatible UART supports data transfers
at speeds up to 115.2 kbits/sec with BIOS support. The serial ports can be assigned as COM1
(3F8h), COM2 (2F8h), COM3 (3E8h), or COM4 (2E8h).
For information about Refer to
The location of the serial port connectors Figure 10, page 53
The signal names of the serial port connectors Table 20, page 54
1.9.2 Parallel Port
The 25-pin D-Sub parallel port connector is located on the back panel. In the BIOS Setup
program, the parallel port can be set to the following modes:
†
• Output only (PC AT
• Bi-directional (PS/2 compatible)
• EPP
• ECP
For information about Refer to
The location of the parallel port connector Figure 10, page 53
The signal names of the parallel port connector Table 19, page 54
Setting the parallel port’s mode Table 66, page 102
-compatible mode)
1.9.3 Diskette Drive Controller
The I/O controller supports one diskette drive that is compatible with the 82077 diskette drive
controller and supports both PC-AT and PS/2 modes.
For information about Refer to
The location of the diskette drive connector Figure 13, page 63
The signal names of the diskette drive connector Table 43, page 70
The supported diskette drive capacities and sizes Table 69, page 108
28
Product Description
1.9.4 Keyboard and Mouse Interface
PS/2 keyboard and mouse connectors are located on the back panel. The +5 V lines to these
†
connectors are protected with a PolySwitch
connection after an overcurrent condition is removed.
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.
The keyboard controller contains the AMI keyboard and mouse controller code, provides the
keyboard and mouse control functions, and supports password protection for power-on/reset. A
power-on/reset password can be specified in the BIOS Setup program.
For information about Refer to
The location of the keyboard and mouse connectors Figure 10, page 53
The signal names of the keyboard and mouse connectors Table 18, page 54
circuit that, like a self-healing fuse, reestablishes the
1.9.5 Infrared Support
On the front panel connector, there are four pins that support Hewlett Packard HSDL-1000
compatible infrared (IR) transmitters and receivers. In the BIOS Setup program, Serial Port B can
be directed to a connected IR device. (In this case, the serial port B connector on the back panel
cannot be used.) The IR connection can be used to transfer files to or from portable devices like
†
laptops, PDAs, and printers. The Infrared Data Association (IrDA
transfers of 115 Kbits/sec at a distance of 1 meter.
For information about Refer to
The front panel connector Table 45, page 72
Configuring serial port B for infrared applications Section 4.4.3, page 102
The IrDA specification Section 1.5, page 18
) specification supports data
29
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.10 Audio Subsystem
Desktop Boards D845MF and D845WR offer two codec options within the audio subsystem.
Both audio subsystem options include these features:
• Split digital/analog architecture for improved S/N (signal-to-noise) ratio: ≥ 85 dB
• Power management support
• Mic-in pre-amp that supports dynamic, condenser, and electret microphones
• Two-channel audio
The standard configuration, two-channel audio subsystem consists of these devices:
• Intel 82801BA I/O Controller Hub (ICH2)
• Analog Devices AD1885 audio codec
The six-channel audio subsystem consists of these devices:
• Intel 82801BA I/O Controller Hub (ICH2)
• Cirrus CS4201 audio codec
• Two onboard CS4334 Digital Analog Converters (DACs)
The audio subsystems support the following audio interfaces:
• ATAPI-style connectors:
Auxiliary line in
CD-ROM
Telephony
• Front panel audio connector, including pins for:
Line out
Mic in
• Back panel audio connectors:
The AD1885 audio subsystem:
Line out
Line in
Mic in
The CS4201 audio subsystem:
Front out (left and right channels)
Rear out (left and right channels)
Center out
Low Frequency Effect (LFE) out
30
Figure 6 is a block diagram of the AD1885 audio subsystem.
82801BA
I/O Controller Hub
(ICH2)
AC ’97
Link
AD1885
Audio Codec
Product Description
Line In
Line Out
Mic In
Auxiliary Line In
CD-ROM
Telephony
Figure 6. AD1885 Audio Subsystem Block Diagram
Figure 7 is a block diagram of the CS4201 audio subsystem.
Audio DAC
82801BA
I/O Controller Hub
(ICH2)
Figure 7. CS4201 Audio Subsystem Block Diagram
AC ’97
Link
CS4201
Audio Codec
Audio DAC
OM13251
Center and LFE Out
Front Out
Mic In
Auxiliary Line In
CD-ROM
Telephony
Rear Out
OM13309
NOTE
✏
In the CS4201 audio connector subsystem, there is no line in signal available on the back panel
and the mic in signal is routed through the front panel audio connector.
For information about Refer to
The front panel audio connector Section 2.8.2.2, page 58
The back panel audio connectors Section 2.8.1, page 53
31
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.10.1 Audio Connectors
1.10.1.1 Front Panel Audio Connector
A 2 x 5-pin connector provides mic-in and line-out signals for front panel audio connectors.
For information about Refer to
The location of the front panel audio connector Figure 11, page 58
The signal names of the front panel audio connector Table 30, page 59
Obtaining the Front Panel I/O Connectivity Design Guide Section 1.5, page 18
NOTE
✏
The front panel audio connector is alternately used as a jumper block for routing audio signals.
Refer to Section 2.9.1 on page 75 for more information.
1.10.1.2 Auxiliary Line In Connector
A 1 x 3-pin ATAPI-style connector connects the left and right channel signals of an internal audio
device to the audio subsystem.
For information about Refer to
The location of the auxiliary line in connector Figure 11, page 58
The signal names of the auxiliary line in connector Table 27, page 59
1.10.1.3 Telephony Connector
A 1 x 4-pin ATAPI-style connector connects the monaural audio signals of an internal telephony
device to the audio subsystem. A monaural audio-in and audio-out signal interface is necessary for
telephony applications such as speakerphones, fax/modems, and answering machines.
For information about Refer to
The location of the telephony connector Figure 11, page 58
The signal names of the telephony connector Table 28, page 59
1.10.1.4 ATAPI CD-ROM Audio Connector
A 1 x 4-pin ATAPI-style connector connects an internal ATAPI CD-ROM drive to the audio
mixer.
For information about Refer to
The location of the ATAPI CD-ROM connector Figure 11, page 58
The signal names of the ATAPI CD-ROM connector Table 29, page 59
32
1.10.2 Audio Subsystem Software
Audio software and drivers are available from Intel’s World Wide Web site.
For information about Refer to
Obtaining audio software and drivers Section 1.3, page 17
1.11 ISA Subsystem (Optional)
The ISA subsystem consists of the LPC-to-ISA bridge and the ISA bus connector.
Features of the LPC-to-ISA bridge include:
• 5 V ISA and 3.3 V LPC interfaces
• Full ISA bus support, except for the following:
16-bit I/O transactions
16-bit memory transactions
16-bit bus mastering
Product Description
For information about Refer to
The location of the ISA bus connector on Desktop Board D845MF Figure 13, page 63
The location of the ISA bus connector on Desktop Board D845WR Figure 14, page 64
The signal names of the ISA bus connector Table 39, page 65
1.12 LAN Subsystem (Optional)
The Network Interface Controller subsystem consists of the ICH2, with integrated LAN Media
Access Controller (MAC) and a physical layer interface device. Features of the LAN subsystem
include:
• PCI Bus Master interface
• Carrier Sense Multiple Access/Collision Detection (CSMA/CD) Protocol Engine
• Serial CSMA/CD unit interface that supports the 82562ET platform LAN connect device
• PCI Power Management
Supports APM
Supports ACPI technology
Supports LAN wake capabilities
33
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.12.1 Intel® 82562ET Platform LAN Connect Device
The Intel 82562ET component provides an interface to the back panel RJ-45 connector with
integrated LEDs.
The Intel 82562ET provides the following functions:
• Basic 10/100 Ethernet LAN connectivity
• Supports RJ-45 connector with status indicator LEDs on the back panel
• Full device driver compatibility
• ACPI support
• Programmable transit threshold
• Configuration EEPROM that contains the MAC address
1.12.2 RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector. Table 7 describes the LED states when the
board is powered up and the LAN subsystem is operating.
Table 7. LAN Connector LED States
LED Color LED State Condition
Off 10 Mbit/sec data rate is selected. Green
On 100 Mbit/sec data rate is selected.
Yellow
Off LAN link is not established.
On (steady state) LAN link is established.
On (brighter and pulsing) The computer is communicating with another computer on
the LAN.
1.12.3 LAN Subsystem Software
LAN software and drivers are available from Intel’s World Wide Web site.
For information about Refer to
Obtaining LAN software and drivers Section 1.3, page 17
34
Product Description
1.13 Hardware Management Subsystem
The hardware management features enable the boards to be compatible with the Wired for
Management (WfM) specification. The board has several hardware management features,
including the following:
• Fan monitoring
• Thermal and voltage monitoring
• Chassis intrusion detection
For information about Refer to
The WfM specification Section 1.5, page 18
1.13.1 Hardware Monitoring
The SMSC LPC47M192 I/O controller provides low-cost instrumentation capabilities. The
features of the component include:
• Internal ambient temperature sensing
• Remote thermal diode sensing for direct monitoring of processor temperature
• Power supply monitoring (+12 V, +5 V, +3.3 V, and Vccp) to detect levels above or below
acceptable values
• SMBus interface
1.13.2 Fan Monitoring
The SMSC LPC47M192 I/O controller provides two fan tachometer inputs. Monitoring can be
®
implemented using Intel
For information about Refer to
The functions of the fan connectors Section 1.14.2.2, page 41
The location of the fan connectors Figure 12, page 60
The signal names of the fan connectors Section 2.8.2.3, page 60
Active Monitor or third-party software.
1.13.3 Chassis Intrusion and Detection
The boards support a chassis security feature that detects if the chassis cover is removed. For the
chassis intrusion circuit to function, the chassis’ power supply must be connected to AC power.
The security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion
connector. The mechanical switch is closed for normal computer operation.
For information about Refer to
The location of the chassis intrusion connector Figure 12, page 60
The signal names of the chassis intrusion connector Table 37, page 62
NOTE
✏
Chassis intrusion detection may be implemented using Intel® LANDesk® Client Manager or thirdparty software.
35
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.14 Power Management
Power management is implemented at several levels, including:
• Software support:
Advanced Power Management (APM)
Advanced Configuration and Power Interface (ACPI)
• Hardware support
Power connector
Fan connectors
LAN wake capabilities
Instantly Available PC technology
Wake on Ring
Resume on Ring
Wake from PS/2 devices
Power Management Event (PME#) wake-up support
1.14.1 Software Support
The software support for power management includes:
• APM
• ACPI
If Desktop Board D845MF/D845WR is used with an ACPI-aware operating system, the BIOS can
provide ACPI support. Otherwise, it defaults to APM support.
1.14.1.1 APM
APM makes it possible for the computer to enter an energy-saving standby mode. The standby
mode can be initiated in the following ways:
• Time-out period specified in the BIOS Setup program
• From the operating system, such as the standby menu item in Windows 98, Windows 2000,
Windows ME, and Windows XP
In standby mode, Desktop Board D845MF/D845WR can reduce power consumption by spinning
†
down hard drives, and reducing power to, or turning off of, VESA
Power management mode can be enabled or disabled in the BIOS Setup program.
While in standby mode, the system retains the ability to respond to external interrupts and service
requests, such as incoming faxes or network messages. Any keyboard or mouse activity brings the
system out of standby mode and immediately restores power to the monitor.
DPMS-compliant monitors.
For information about Refer to
Enabling or disabling power management in the BIOS Setup program Section 4.6, page 112
Desktop Boards D845MF and D845WR compliance level with APM Section 1.5, page 18
36
Product Description
1.14.1.2 ACPI
ACPI gives the operating system direct control over the power management and Plug and Play
functions of a computer. The use of ACPI with the Desktop Boards D845MF and D845WR
requires an operating system that provides full ACPI support. ACPI features include:
• Plug and Play (including bus and device enumeration)
• Power management control of individual devices, add-in boards (some add-in boards may
require an ACPI-aware driver), video displays, and hard disk drives
• Methods for achieving less than 15-watt system operation in the power-on/standby
sleeping state
• A Soft-off feature that enables the operating system to power-off the computer
• Support for multiple wake-up events (see Table 10 on page 39)
• Support for a front panel power and sleep mode switch. Table 8 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.
The BIOS enables ACPI by default; but the operating system must support an ACPI driver for the
power management features to work. For example, Windows XP supports the power management
features upon detecting that ACPI is enabled in the BIOS.
Table 8. Effects of Pressing the Power Switch
If the system is in this state…
Off
(ACPI G2/G5 – Soft off)
On
(ACPI G0 – working state)
On
(ACPI G0 – working state)
Sleep
(ACPI G1 – sleeping state)
Sleep
(ACPI G1 – sleeping state)
…and the power switch is
pressed for
Less than four seconds Power-on
Less than four seconds Soft-off/Standby
More than four seconds Fail safe power-off
Less than four seconds Wake-up
More than four seconds Power-off
…the system enters this state
(ACPI G0 – working state)
(ACPI G1 – sleeping state)
(ACPI G2/G5 – Soft off)
(ACPI G0 – working state)
(ACPI G2/G5 – Soft off)
For information about Refer to
Desktop Boards D845MF and D845WR compliance level with ACPI Section 1.5, page 18
37
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.14.1.2.1 System States and Power States
Under ACPI, the operating system directs all system and device power state transitions. The
operating system puts devices in and out of low-power states based on user preferences and
knowledge of how devices are being used by applications. Devices that are not being used can be
turned off. The operating system uses information from applications and user settings to put the
system as a whole into a low-power state.
Table 9 lists the power states supported by Desktop Boards D845MF and D845WR along with the
associated system power targets. See the ACPI specification for a complete description of the
various system and power states.
Table 9. Power States and Targeted System Power
Global States Sleeping States
G0 – working
state
G1 – sleeping
state
G1 – sleeping
state
G1 – sleeping
state
G2/S5 S5 – Soft off.
G3 –
mechanical off
AC power is
disconnected
from the
computer.
Notes:
1. Total system power is dependent on the system configuration, including add-in boards and peripherals powered
by the system chassis’ power supply.
2. Dependent on the standby power consumption of wake-up devices used in the system.
S0 – working. C0 – working D0 – working
S1 – Processor
stopped.
S3 – Suspend to
RAM. Context
saved to RAM.
S4 – Suspend to
disk. Context
saved to disk.
Context not saved.
Cold boot is
required.
No power to the
system.
Processor
States
C1 – stop
grant
No power D3 – no power
No power D3 – no power
No power D3 – no power
No power D3 – no power for
Device States
state.
D1, D2, D3 –
device
specification
specific.
except for
wake-up logic.
except for
wake-up logic.
except for
wake-up logic.
wake-up logic,
except when
provided by
battery or external
source.
Targeted System
(Note 1)
Power
Full power > 30 W
5 W < power < 52.5 W
Power < 5 W
Power < 5 W
Power < 5 W
No power to the system.
Service can be performed
safely.
(Note 2)
(Note 2)
(Note 2)
38
Product Description
1.14.1.2.2 Wake-up Devices and Events
Table 10 lists the devices or specific events that can wake the computer from specific states.
Table 10. Wake-up Devices and Events
These devices/events can wake up the computer… …from this state
Power switch S1, S3, S4, S5
RTC alarm S1, S3, S4, S5
LAN S1, S3, S4, S5
PME# S1, S3, S4, S5
Modem (back panel Serial Port A) S1, S3
PS/2 devices S1, S3
Note: For LAN and PME#, S5 is disabled by default in the BIOS Setup program. Setting this option to Power On will
enable a wake-up event from LAN in the S5 state.
NOTE
✏
(Note)
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.
1.14.1.2.3 Plug and Play
In addition to power management, ACPI provides control information so that operating systems
can facilitate Plug and Play. ACPI is used only to configure devices that do not use other hardware
configuration standards. PCI devices, for example, are not configured by ACPI.
39
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.14.2 Hardware Support
CAUTION
Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities
and Instantly Available PC technology features are used. Failure to do so can damage the power
supply. The total amount of standby current required depends on the wake devices supported and
manufacturing options. Refer to Section 2.11.3 on page 80 for additional information.
Desktop Boards D845MF and D845WR provide several power management hardware features,
including:
• Power connector
• Fan connectors
• LAN wake capabilities
• Instantly Available PC technology
• Wake on Ring
• Resume on Ring
• Wake from PS/2 keyboard
• PME# wake-up support
LAN wake capabilities and Instantly Available PC technology require power from the +5 V
standby line. The sections discussing these features describe the incremental standby power
requirements for each.
Resume on Ring enables telephony devices to access the computer when it is in a power-managed
state. The method used depends on the type of telephony device (external or internal) and the
power management mode being used (APM or ACPI).
NOTE
✏
The use of Resume on Ring from an ACPI state requires an operating system that provides full
ACPI support.
40
Product Description
1.14.2.1 Power Connector
When used with an ATX12V- or SFX12V-compliant power supply that supports remote power
on/off, Desktop Boards D845MF and D845WR can turn off the system power through software
control. When the system BIOS receives the correct command from the operating system, the
BIOS turns off power to the computer.
With soft-off enabled, if power to the computer is interrupted by a power outage or a disconnected
power cord, when power resumes, 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 After Power Failure
feature in the BIOS Setup program’s Boot menu.
For information about Refer to
The location of the power connector Figure 12, page 60
The signal names of the power connector Table 34, page 61
The BIOS Setup program’s Boot menu Table 76, page 114
The ATX and SFX specifications Section 1.5, page 18
1.14.2.2 Fan Connectors
Table 11 summarizes the function/operation of the fan connectors.
Table 11. Fan Connector Function/Operation
Connector Description
Processor fan • +12 V DC connection for a processor fan or active fan heatsink.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Wired to a fan tachometer input of the SMSC LPC47M192 I/O controller.
Front chassis fan • +12 V DC connection for a system or chassis fan.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
• Wired to a fan tachometer input of the SMSC LPC47M192 I/O controller.
Rear chassis fan • +12 V DC connection for a system or chassis fan.
• Fan is on in the S0 or S1 state.
Fan is off when the system is off or in the S3, S4, or S5 state.
For information about Refer to
The location of the fan connectors Figure 12, page 60
The signal names of the fan connectors Section 2.8.2.3, page 60
41
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.14.2.3 LAN Wake Capabilities
CAUTION
For LAN wake capabilities, the +5 V standby line for the power supply must be capable of
providing adequate +5 V standby current. Failure to provide adequate standby current when
implementing LAN wake capabilities can damage the power supply. Refer to Section 2.11.3 on
page 80 for additional information.
LAN wake capabilities enable remote wake-up of the computer through a network. The LAN
subsystem PCI bus network adapter monitors network traffic at the Media Independent Interface.
†
Upon detecting a Magic Packet
up the computer. Depending on the LAN implementation, Desktop Boards D845MF and D845WR
support LAN wake capabilities with ACPI in the following ways:
†
• the Wake on LAN
technology connector (ACPI only)
• the PCI bus PME# signal for PCI 2.2 compliant LAN designs (ACPI only)
• the optional onboard LAN subsystem (ACPI only)
The Wake on LAN technology connector can be used with PCI bus network adapters that have a
remote wake up connector, as shown in Figure 8. Network adapters that are PCI 2.2 compliant
assert the wakeup signal through the PCI bus signal PME# (pin A19 on the PCI bus connectors).
frame, the LAN subsystem asserts a wake-up signal that powers
Network
Interface
Card
PCI Slot
Remote
Wake up
connector
Desktop Board
Wake on
LAN
technology
connector
OM09129
Figure 8. Using the Wake on LAN Technology Connector
For information about Refer to
The location of the Wake on LAN technology connector Figure 12, page 60
The signal names of the Wake on LAN technology connector Table 36, page 62
42
Product Description
1.14.2.4 Instantly Available PC Technology
Instantly Available PC technology enables Desktop Boards D845MF and D845WR 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 10 on page 39 lists the devices and events that can wake the computer
from the S3 state. S3 support is enabled by default in the BIOS.
CAUTION
For Instantly Available PC technology, the +5 V standby line for the power supply must be
capable of providing adequate +5 V standby current. Failure to provide adequate standby current
when implementing Instantly Available PC technology can damage the power supply. Refer to
Section 2.11.3 on page 80 for additional information.
Desktop Boards D845MF and D845WR support the PCI Bus Power Management Interface
Specification. For information on the versions of this specification, see Section 1.5. Add-in
boards that also support this specification can participate in power management and can be used to
wake the computer.
The use of Instantly Available PC technology requires operating system support and PCI 2.2
compliant add-in cards and drivers.
The standby power indicator LED shows that power is still present even when the computer
appears to be off. Figure 9 shows the location of the standby power indicator LED on Desktop
Board D845WR. The standby power indicator LED is located at CR3H1 on Desktop Board
D845MF.
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.
CR4H1
OM13219
Figure 9. Location of the Standby Power Indicator LED
43
Intel Desktop Board D845MF/D845WR Technical Product Specification
1.14.2.5 Wake on Ring
The operation of Wake on Ring can be summarized as follows:
• Powers up the computer from the APM soft-off mode.
• Requires two calls to access the computer:
First call restores the computer.
Second call enables access (when supporting software is installed).
• Detects incoming call differently for external as opposed to internal modems:
For external modems, board hardware monitors the ring indicator (RI) input of the serial
port.
For internal modems, the board is awakened using the PME# signal.
1.14.2.6 Resume on Ring
The operation of Resume on Ring can be summarized as follows:
• Resumes operation from ACPI S1 or S3 states
• Requires only one call to access the computer
• Detects incoming call similarly for external and internal modems
• Requires modem interrupt be unmasked for correct operation
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# Wake-up Support
When the PME# signal on the PCI bus is asserted, the computer wakes from an ACPI S1, S3, S4,
or S5 state (with Wake on PME enabled in BIOS).
44
2 Technical Reference
What This Chapter Contains
2.1 Introduction.................................................................................................................45
2.2 Memory Map ..............................................................................................................45
2.3 I/O Map .....................................................................................................................46
2.4 DMA Channels ...........................................................................................................48
2.5 PCI Configuration Space Map ....................................................................................48
2.6 Interrupts ....................................................................................................................49
2.7 PCI Interrupt Routing Map..........................................................................................50
2.8 Connectors.................................................................................................................52
2.9 Jumper Blocks............................................................................................................74
2.10 Mechanical Considerations.........................................................................................77
2.11 Electrical Considerations ............................................................................................79
2.12 Thermal Considerations..............................................................................................82
2.13 Reliability ....................................................................................................................84
2.14 Environmental ............................................................................................................84
2.15 Regulatory Compliance ..............................................................................................85
2.1 Introduction
Sections 2.2 - 2.6 contain several standalone tables. Table 12 describes the system memory map,
Table 13 shows the I/O map, Table 14 lists the DMA channels, Table 15 defines the PCI
configuration space map, and Table 16 describes the interrupts. The remaining sections in this
chapter are introduced by text found with their respective section headings.
2.2 Memory Map
Table 12. System Memory Map
Address Range (decimal) Address Range (hex) Size Description
1024 K - 2097152 K 100000 - 7FFFFFFF 2047 MB Extended memory
960 K - 1024 K F0000 - FFFFF 64 KB Runtime BIOS
896 K - 960 K E0000 - EFFFF 64 KB Reserved
800 K - 896 K C8000 - DFFFF 96 KB Available high DOS memory (open
to the PCI bus)
640 K - 800 K A0000 - C7FFF 160 KB Video memory and BIOS
639 K - 640 K 9FC00 - 9FFFF 1 KB Extended BIOS data (movable by
memory manager software)
512 K - 639 K 80000 - 9FBFF 127 KB Extended conventional memory
0 K - 512 K 00000 - 7FFFF 512 KB Conventional memory
45
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.3 I/O Map
Table 13. I/O Map
Address (hex) Size Description
0000 - 000F 16 bytes DMA controller
0020 - 0021 2 bytes Programmable Interrupt Control (PIC)
0040 - 0043 4 bytes System timer
0060 1 byte Keyboard controller byte—reset IRQ
0061 1 byte System speaker
0064 1 byte Keyboard controller, CMD/STAT byte
0070 - 0071 2 bytes System CMOS/Real Time Clock
0072 - 0073 2 bytes System CMOS
0080 - 008F 16 bytes DMA controller
0092 1 byte Fast A20 and PIC
00A0 - 00A1 2 bytes PIC
00B2 - 00B3 2 bytes APM control
00C0 - 00DF 32 bytes DMA
00F0 1 byte Numeric data processor
0170 - 0177 8 bytes Secondary IDE channel
01F0 - 01F7 8 bytes Primary IDE channel
0228 - 022F
0278 - 027F
02E8 - 02EF
02F8 - 02FF
0376 1 byte Secondary IDE channel command port
0377, bits 6:0 7 bits Secondary IDE channel status port
0378 - 037F 8 bytes LPT1
03B0 - 03BB 12 bytes Intel 82845 MCH
03C0 - 03DF 32 bytes Intel 82845 MCH
03E8 - 03EF 8 bytes COM3
03F0 - 03F5 6 bytes Diskette channel 1
03F6 1 byte Primary IDE channel command port
03F8 - 03FF 8 bytes COM1
04D0 - 04D1 2 bytes Edge/level triggered PIC
LPTn + 400 8 bytes ECP port, LPTn base address + 400h
0CF8 - 0CFB
0CF9
0CFC - 0CFF 4 bytes PCI configuration data register
FFA0 - FFA7 8 bytes Primary bus master IDE registers
FFA8 - FFAF 8 bytes Secondary bus master IDE registers
(Note 1)
8 bytes LPT3
(Note 1)
8 bytes LPT2
(Note 1)
8 bytes COM4/video (8514A)
(Note 1)
8 bytes COM2
(Note 2)
4 bytes PCI configuration address register
(Note 3)
1 byte Turbo and reset control register
continued
46
Table 13. I/O Map (continued)
Address (hex) Description
96 contiguous bytes starting on a 128-byte
divisible boundary
64 contiguous bytes starting on a 64-byte
divisible boundary
64 contiguous bytes starting on a 64-byte
divisible boundary
32 contiguous bytes starting on a 32-byte
divisible boundary
16 contiguous bytes starting on a 16-byte
divisible boundary
4096 contiguous bytes starting on a 4096-byte
divisible boundary
256 contiguous bytes starting on a 256-byte
divisible boundary
64 contiguous bytes starting on a 64-byte
divisible boundary
32 contiguous bytes starting on a 32-byte
divisible boundary
96 contiguous bytes starting on a 128-byte
divisible boundary
Notes:
1. Default, but can be changed to another address range
2. Dword access only
3. Byte access only
ICH2 (ACPI + TCO)
Desktop Board D845MF/D845WR resource
Onboard audio controller
ICH2 (USB controller 1)
ICH2 (SMBus)
Intel 82801BA PCI bridge
ICH2 audio mixer
ICH2 audio bus mixer
ICH2 (USB controller 2)
LPC47M192
Technical Reference
✏ NOTE
Some additional I/O addresses are not available due to ICH2 address aliassing.
For information about Refer to
ICH2 addressing Section 1.3 on page 17
47
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.4 DMA Channels
Table 14. DMA Channels
DMA Channel Number Data Width System Resource
0 8 or 16 bits Open
1 8 or 16 bits Parallel port
2 8 or 16 bits Diskette drive
3 8 or 16 bits Parallel port (for ECP or EPP)
4 8 or 16 bits DMA controller
5 16 bits Open
6 16 bits Open
7 16 bits Open
2.5 PCI Configuration Space Map
Table 15. PCI Configuration Space Map
Bus
Number (hex)
00 00 00 Memory controller of Intel 82845 component
00 01 00 PCI to AGP bridge
00 1E 00 Hub link to PCI bridge
00 1F 00 Intel 82801BA ICH2 PCI to LPC bridge
00 1F 01 IDE controller
00 1F 02 USB
00 1F 03 SMBus controller
00 1F 04 USB
00 1F 05 AC ’97 audio controller
00 1F 06 AC ’97 modem controller (optional)
01 00 00 Add-in AGP adapter card
02 08 00 LAN controller (optional)
02 09 00 PCI bus connector 1
02 0A 00 PCI bus connector 2
02 0B 00 PCI bus connector 3
02 0C 00 PCI bus connector 4
02 0D 00 PCI bus connector 5
02 0E 00 PCI bus connector 6
Note: Desktop Board D845MF only
Device
Number (hex)
Function
Number (hex) Description
(Note)
(Note)
(Note)
48
Technical Reference
2.6 Interrupts
The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the
Advanced Programmable Interrupt Controller (APIC) portion of the ICH2 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 16. Interrupts
IRQ System Resource
NMI I/O channel check
0 Reserved, interval timer
1 Reserved, keyboard buffer full
2 Reserved, cascade interrupt from slave PIC
3 COM2
4 COM1
5 LPT2 (Plug and Play option)/User available
6 Diskette drive
7 LPT1
8 Real-time clock
9 Reserved for ICH2 system management bus
10 User available
11 User available
12 Onboard mouse port (if present, else user available)
13 Reserved, math coprocessor
14 Primary IDE (if present, else user available)
15 Secondary IDE (if present, else user available)
(Note 2)
16
17
19
20
23
Notes:
1. Default, but can be changed to another IRQ.
2. Available in APIC mode only.
AGP video (through PIRQA)
(Note 2)
AC ’97 audio/User available (through PIRQB)
(Note 2)
ICH2 USB controller 1 (through PIRQD)
(Note 2)
ICH2 LAN (optional) (through PIRQE)
(Note 2)
ICH2 USB controller 2/User available (through PIRQH)
(Note 1)
(Note 1)
(Note 1)
49
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.7 PCI Interrupt Routing Map
This section describes interrupt sharing and how the interrupt signals are connected between the
PCI bus connectors and onboard PCI devices. The PCI specification specifies how interrupts can
be shared between devices attached to the PCI bus. In most cases, the small amount of latency
added by interrupt sharing does not affect the operation or throughput of the devices. In some
special cases where maximum performance is needed from a device, a PCI device should not share
an interrupt with other PCI devices. Use the following information to avoid sharing an interrupt
with a PCI add-in card.
PCI devices are categorized as follows to specify their interrupt grouping:
• INTA: By default, all add-in cards that require only one interrupt are in this category. For
almost all cards that require more than one interrupt, the first interrupt on the card is also
classified as INTA.
• INTB: Generally, the second interrupt on add-in cards that require two or more interrupts is
classified as INTB. (This is not an absolute requirement.)
• INTC and INTD: Generally, a third interrupt on add-in cards is classified as INTC and a
fourth interrupt is classified as INTD.
The ICH2 has eight programmable interrupt request (PIRQ) input signals. All PCI interrupt
sources either onboard or from a PCI add-in card connect to one of these PIRQ signals. Some PCI
interrupt sources are electrically tied together on Desktop Boards D845MF and D845WR and
therefore share the same interrupt. Table 17 shows an example of how the PIRQ signals are routed
on Desktop Boards D845MF and D845WR.
For example, using Table 17 as a reference, assume an add-in card using INTB is plugged into PCI
bus connector 3. In PCI bus connector 3, INTB is connected to PIRQB, which is already
connected to the SMBus. The add-in card in PCI bus connector 3 now shares interrupts with these
onboard interrupt sources.
50
Technical Reference
Table 17. PCI Interrupt Routing Map
PCI Interrupt Source
AGP connector INTB INTA to PIRQA
ICH2 USB controller 1 INTD to PIRQD
SMBus controller INTB
ICH2 USB controller 2 INTC
ICH2 LAN INTA to PIRQE
PCI bus connector 1 INTA INTB INTC INTD
PCI bus connector 2 INTD INTA INTB INTC
PCI bus connector 3 INTC INTD INTA INTB
PCI bus connector 4
PCI bus connector 5
PCI bus connector 6
Note: Desktop Board D845MF only
(Note)
INTB INTC INTD INTA
(Note)
INTA INTB INTC INTD
(Note)
INTB INTC INTD INTA
PIRQF PIRQG PIRQH PIRQB Other
ICH2 PIRQ Signal Name
NOTE
✏
In PIC mode, the ICH2 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 16 for the
allocation of PIRQ lines to IRQ signals in APIC mode.
51
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.8 Connectors
CAUTION
Only the back panel, the front panel audio, and the front panel USB connectors of Desktop Boards
D845MF and D845WR have overcurrent protection. The boards’ internal connectors are not
overcurrent protected and should connect only to devices inside the computer’s chassis, such as
fans and internal peripherals. Do not use these connectors to power devices external to the
computer’s chassis. A fault in the load presented by the external devices could cause damage to
the computer, the interconnecting cable, and the external devices themselves.
This section describes the board’s connectors. The connectors can be divided into the following
groups:
• Back panel I/O connectors (see page 53)
PS/2 keyboard and mouse
Serial ports A and B
Parallel port
Audio (line out/front, line in/rear, and mic in/center and LFE)
MIDI/game port
USB (two ports)
LAN (optional)
• Internal I/O connectors (see page 57)
Audio (auxiliary line in, ATAPI CD-ROM, telephony, and front panel audio)
Fans
Power
Add-in boards (PCI and AGP)
ISA (optional)
IDE
Diskette drive
Wake on LAN technology
Wake on Ring
Chassis intrusion
• External I/O connectors (see page 71)
Front panel USB
Front panel (power/sleep/message-waiting LED, hard drive activity LED, reset switch,
power switch, and infrared port)
NOTE
✏
When installing the board in a microATX chassis, make sure that peripheral devices are installed
at least 1.5 inches above the main power connector, the diskette drive connector, the IDE
connector, and the DIMM sockets.
52
2.8.1 Back Panel Connectors
Figure 10 shows the location of the back panel connectors. The back panel connectors are
color-coded in compliance with PC 99 recommendations. The figure legend below lists the
colors used.
Technical Reference
A
CF
J
HBIKLEGD
OM13221
Item Description Color For more information see:
A PS/2 mouse port Green Table 18
B PS/2 keyboard port Purple Table 18
C Parallel port Burgundy Table 19
D Serial port A Teal Table 20
E Serial port B Teal Table 20
F MIDI/game port Orange Table 21
G Audio line out/Front out Lime green Table 22
H Audio line in/Rear out Light blue Table 23
I Mic in/Center and LFE out Pink Table 24
J LAN (optional) Black Table 25
K USB port Black Table 26
L USB port Black Table 26
Figure 10. Back Panel Connectors
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.
53
Intel Desktop Board D845MF/D845WR Technical Product Specification
Table 18. PS/2 Mouse/Keyboard Connector
Pin Signal Name
1 Data
2 Not connected
3 Ground
4 +5 V (Fused)
5 Clock
6 Not connected
Table 19. Parallel Port Connector
Pin Standard Signal Name ECP Signal Name EPP Signal Name
1 STROBE# STROBE# WRITE#
2 PD0 PD0 PD0
3 PD1 PD1 PD1
4 PD2 PD2 PD2
5 PD3 PD3 PD3
6 PD4 PD4 PD4
7 PD5 PD5 PD5
8 PD6 PD6 PD6
9 PD7 PD7 PD7
10 ACK# ACK# INTR
11 BUSY BUSY#, PERIPHACK WAIT#
12 PERROR PE, ACKREVERSE# PE
13 SELECT SELECT SELECT
14 AUDOFD# AUDOFD#, HOSTACK DATASTB#
15 FAULT# FAULT#, PERIPHREQST# FAULT#
16 INIT# INIT#, REVERSERQST# RESET#
17 SLCTIN# SLCTIN# ADDRSTB#
18 – 25 Ground Ground Ground
Table 20. Serial Port Connectors
Pin Signal Name
1 DCD (Data Carrier Detect)
2 RXD# (Receive Data)
3 TXD# (Transmit Data)
4 DTR (Data Terminal Ready)
5 Ground
6 DSR (Data Set Ready)
7 RTS (Request to Send)
8 CTS (Clear to Send)
9 RI (Ring Indicator)
54
Table 21. MIDI/Game Port Connector
Pin Signal Name Pin Signal Name
1 +5 V (fused) 9 +5 V (fused)
2 J1B1 10 J2B1
3 J1X 11 J2X
4 Ground 12 MIDI-OUT
5 Ground 13 J2Y
6 J1Y 14 J2B2
7 J1B2 15 MIDI-IN
8 +5 V (fused)
Table 22. Audio Line Out/Front Out Connector
Pin Signal Name Alternate Signal Name
Tip Audio left out Front left
Ring Audio right out Front right
Sleeve Ground Ground
Note: Alternate signal names apply only to boards with six-channel audio.
(Note)
Technical Reference
Table 23. Audio Line In/Rear Out Connector
Pin Signal Name Alternate Signal Name
Tip Audio left in Rear left
Ring Audio right in Rear right
Sleeve Ground Ground
Note: Alternate signal names apply only to boards with six-channel audio.
Table 24. Mic In/Center and LFE Out Connector
Pin Signal Name Alternate Signal Name
Tip Mono in Audio center
Ring Mic bias voltage Audio LFE
Sleeve Ground Ground
Note: Alternate signal names apply only to boards with six-channel audio.
(Note)
(Note)
55
Intel Desktop Board D845MF/D845WR Technical Product Specification
Table 25. LAN Connector (Optional)
Pin Signal Name
1 TX+
2 TX-
3 RX+
4 Ground
5 Ground
6 RX-
7 Ground
8 Ground
Table 26. USB Connectors
Pin Signal Name
1 +5 V (fused)
2 USB#
3 USB
4 Ground
56
2.8.2 Internal I/O Connectors
The internal I/O connectors are divided into the following functional groups:
• Audio (see page 58)
Auxiliary line in
Telephony
ATAPI CD-ROM
Front panel audio
• Power and hardware control (see page 60)
Fans (three)
ATX12V
Main power
Wake on LAN technology
Wake on Ring
Chassis intrusion
• Add-in boards and peripheral interfaces (see page 63)
PCI bus (six on Desktop Board D845MF; three on Desktop Board D845WR)
AGP
ISA (optional)
IDE (two)
Diskette drive
Technical Reference
2.8.2.1 Expansion Slots
The board has the following expansion slots:
• One AGP connector. The AGP connector is keyed for 1.5 V AGP cards only. Do not install a
legacy 3.3 V AGP card. The AGP connector is not mechanically compatible with legacy
3.3 V AGP cards.
• PCI, rev 2.2 compliant local bus slots (six on Desktop Board D845MF, three on Desktop
Board D845WR). The SMBus is routed to PCI bus connector 1 only (ATX chassis expansion
slot 6). PCI add-in cards with SMBus support can access sensor data and other information
residing on the board.
• One ISA bus connector (optional), shared with PCI bus connector 3 (ATX chassis expansion
slot 1) on Desktop Board D845WR and shared with PCI bus connector 6 (ATX chassis
expansion slot 1) on the Desktop Board D845MF.
NOTE
✏
This document references back-panel slot numbering with respect to processor location on the
board. The AGP slot is not numbered. PCI slots are identified as PCI slot #x, starting with the
slot closest to the processor. The optional ISA bus connector shares ATX chassis expansion slot 1
on Desktop Boards D845WR and D845MF. The ATX/MicroATX specifications identify expansion
slot locations with respect to the far edge of a full-sized ATX chassis. The ATX specification and
the board’s silkscreen are opposite and could cause confusion. The ATX numbering convention is
made without respect to slot type (PCI vs. AGP), but refers to an actual slot location on a chassis.
Figure 13 on page 63 illustrates the board’s PCI slot numbering.
57
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.8.2.2 Audio Connectors
Figure 11 shows the location of the audio connectors.
D
10
9
21
C
B
1
A
14
4
1
4
OM13220
Item Description Color For more information see:
A Auxiliary line in, ATAPI style White Table 27
B Telephony Green Table 28
C ATAPI CD-ROM Black Table 29
D Front panel audio Black Table 30
Figure 11. Audio Connectors
58
Table 27. Auxiliary Line In Connector
Pin Signal Name
1 Left auxiliary line in
2 Ground
3 Ground
4 Right auxiliary line in
Table 28. Telephony Connector
Pin Signal Name
1 Audio_Mono_In
2 Ground
3 Ground
4 Audio_Mono_Out
Table 29. ATAPI CD-ROM Connector
Pin Signal Name
1 Left audio input from CD-ROM
2 CD audio differential ground
3 CD audio differential ground
4 Right audio input from CD-ROM
Technical Reference
Table 30. Front Panel Audio Connector
Pin Signal Name Pin Signal Name
1 MIC_IN_FP 2 Ground
3 MIC_BIAS 4 V_5P0_AUD_ANALOG
5 R_FNTOUT 6 R_RETIN
7 Ground 8 Key
9 L_FNT_OUT 10 L_RETIN
NOTE
✏
The front panel audio connector is alternately used as a jumper block for routing audio signals.
Refer to Section 2.9.1 on page 75 for more information.
59
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.8.2.3 Power and Hardware Control Connectors
Figure 12 shows the location of the power and hardware control connectors.
21
H
4
3
3
A
1
G
F
2
1
1
3
13
1
3
12
20
10
11
1
E D
OM13222
Item Description For more information see:
A Rear chassis fan Table 31
B Processor fan Table 32
C Wake on Ring Table 33
D Main power Table 34
E Front chassis fan Table 35
F Wake on LAN technology Table 36
G Chassis intrusion Table 37
H +12 V power (ATX12V) Table 38
B
C
60
Figure 12. Power and Hardware Control Connectors
For information about Refer to
The power connector Section 1.14.2.1, page 41
The functions of the fan connectors Section 1.14.2.2, page 41
Table 31. Rear Chassis Fan Connector
Pin Signal Name
1 Ground
2 VREG_12V_POWER
3 REAR_FAN_TACH
Table 32. Processor Fan Connector
Pin Signal Name
1 Ground
2 VREG_12V_POWER
3 CPU_FAN_TACH
Table 33. Wake on Ring Connector
Pin Signal Name
1 Ground
2 RINGA#
Technical Reference
Table 34. Main Power Connector
Pin Signal Name Pin Signal Name
1 +3.3 V 11 +3.3 V
2 +3.3 V 12 -12 V
3 Ground 13 Ground
4 +5 V 14 PS-ON# (power supply remote on/off)
5 Ground 15 Ground
6 +5 V 16 Ground
7 Ground 17 Ground
8 PWRGD (Power Good) 18 No connect
9 +5 V (Standby) 19 +5 V
10 +12 V 20 +5 V
Table 35. Front Chassis Fan Connector
Pin Signal Name
1 Ground
2 +12 V
3 No connect
61
Intel Desktop Board D845MF/D845WR Technical Product Specification
Table 36. Wake on LAN Technology
Connector
Pin Signal Name
1 +5 VSB
2 Ground
3 WOL
Table 37. Chassis Intrusion Connector
Pin Signal Name
1 Intrusion
2 Ground
NOTE
✏
Use only ATX12V- or SFX12V-compliant power supplies with Desktop Boards D845MF and
D845WR. ATX12V and SFX12V power supplies have an additional power lead that provides
required supplemental power for the Intel Pentium 4 processor. Always connect the 20-pin and
4-pin leads of ATX12V and SFX12V power supplies to the corresponding connectors on Desktop
Boards D845MF and D845WR, otherwise the board will not boot.
Table 38. ATX12V Power Connector
Pin Signal Name Pin Signal Name
1 Ground 2 Ground
3 +12 V 4 +12 V
NOTE
✏
Do not use a standard ATX power supply. The board will not boot if the ATX12V power connector
is not attached to the board.
62
Technical Reference
2.8.2.4 Add-in Board and Peripheral Interface Connectors
Figure 13 shows the location of the add-in board connector and peripheral connectors for Desktop
Board D845MF. Note the following considerations for the PCI bus connectors (for both boards):
• All of the PCI bus connectors are bus master capable.
• PCI bus connector 1 has SMBus signals routed to it. This enables PCI bus add-in boards with
SMBus support to access sensor data on the board. The specific SMBus signals are as follows:
The SMBus clock line is connected to pin A40
The SMBus data line is connected to pin A41
A
HGFEDCB
2
1
2
1
2
1
K
40
39
40
39
34
33
J I
Item Description For more information see:
A ISA bus connector (optional) Table 39
B PCI bus connector 6 Table 40
C PCI bus connector 5 Table 40
D PCI bus connector 4 Table 40
E PCI bus connector 3 Table 40
F PCI bus connector 2 Table 40
G PCI bus connector 1 Table 40
H AGP connector Table 41
I Secondary IDE Table 42
J Primary IDE Table 42
K Diskette drive Table 43
OM13235
Figure 13. Desktop Board D845MF Add-in Board and Peripheral Interface Connectors
63
Intel Desktop Board D845MF/D845WR Technical Product Specification
Figure 14 shows the location of the add-in board connector and peripheral connectors for Desktop
Board D845WR.
A EDCB
2
1
2
1
2
1
H
40
39
40
39
34
33
G F
OM13223
Item Description For more information see:
A ISA bus connector (optional) Table 39
B PCI bus connector 3 Table 40
C PCI bus connector 2 Table 40
D PCI bus connector 1 Table 40
E AGP connector Table 41
F Secondary IDE Table 42
G Primary IDE Table 42
H Diskette drive Table 43
Figure 14. Desktop Board D845WR Add-in Board and Peripheral Interface Connectors
64
Technical Reference
Table 39. ISA Bus Connector (Optional)
Pin Signal Name Pin Signal Name
B1 Ground A1 IOCHK# (IOCHCK#)
B2 RESET (RESDRV) A2 SD7
B3 +5 V A3 SD6
B4 IRQ9 A4 SD5
B5 -5 V A5 SD4
B6 DRQ2 A6 SD3
B7 -12 V A7 SD2
B8 SRDY# (NOWS#) A8 SD1
B9 +12 V A9 SD0
B10 Ground A10 IOCHRDY (CHRDY)
B11 SMEMW# (SMWTC#) A11 AEN
B12 SMEMR# (SMRDC#) A12 SA19
B13 IOW# (IOWC#) A13 SA18
B14 IOR# (IORC#) A14 SA17
B15 DACK3# A15 SA16
B16 DRQ3 A16 SA15
B17 DACK1# A17 SA14
B18 DRQ1 A18 SA13
B19 REFRESH# A19 SA12
B20 BCLK A20 SA11
B21 IRQ7 A21 SA10
B22 IRQ6 A22 SA9
B23 IRQ5 A23 SA8
B24 IRQ4 A24 SA7
B25 IRQ3 A25 SA6
B26 DACK2# A26 SA5
B27 TC A27 SA4
B28 BALE A28 SA3
B29 +5 V A29 SA2
B30 OSC A30 SA1
B31 Ground A31 SA0
Key Key
D1 MEMCS16# (M16#) C1 SBHE#
D2 IOCS16# (IO16#) C2 LA23
D3 IRQ10 C3 LA22
Note: Items in parentheses are alternate versions of signal names.
continued
65
Intel Desktop Board D845MF/D845WR Technical Product Specification
Table 39. ISA Bus Connector (Optional) (continued)
Pin Signal Name Pin Signal Name
D4 IRQ11 C4 LA21
D5 IRQ12 C5 LA20
D6 IRQ13 C6 LA19
D7 IRQ14 C7 LA18
D8 DACK0# C8 LA17
D9 DRQ0 C9 MEMR# (MRDC#)
D10 DACK5# C10 MEMW# (MWTC#)
D11 DRQ5 C11 SD8
D12 DACK6# C12 SD9
D13 DRQ6 C13 SD10
D14 DACK7# C14 SD11
D15 DRQ7 C15 SD12
D16 +5 V C16 SD13
D17 Master16# (MASTER#) C17 SD14
D18 Ground C18 SD15
Note: Items in parentheses are alternate versions of signal names.
66
Technical Reference
Table 40. PCI Bus Connectors
Pin Signal Name Pin Signal Name Pin Signal Name Pin Signal Name
A1 Ground (TRST#)* B1 -12 V A32 AD16 B32 AD17
A2 +12 V B2 Ground (TCK)* A33 +3.3 V B33 C/BE2#
A3 +5 V (TMS)* B3 Ground A34 FRAME# B34 Ground
A4 +5 V (TDI)* B4 Not connected (TDO)* A35 Ground B35 IRDY#
A5 +5 V B5 +5 V A36 TRDY# B36 +3.3 V
A6 INTA# B6 +5 V A37 Ground B37 DEVSEL#
A7 INTC# B7 INTB# A38 STOP# B38 Ground
A8 +5 V B8 INTD# A39 +3.3 V B39 LOCK#
A9 Reserved B9 Not connected
(PRSNT1#)*
A10 +5 V (I/O) B10 Reserved A41 Reserved *** B41 +3.3 V
A11 Reserved B11 Not connected
(PRSNT2#)*
A12 Ground B12 Ground A43 PAR B43 +3.3 V
A13 Ground B13 Ground A44 AD15 B44 C/BE1#
A14 +3.3 V aux B14 Reserved A45 +3.3 V B45 AD14
A15 RST# B15 Ground A46 AD13 B46 Ground
A16 +5 V (I/O) B16 CLK A47 AD11 B47 AD12
A17 GNT# B17 Ground A48 Ground B48 AD10
A18 Ground B18 REQ# A49 AD09 B49 Ground
A19 PME# B19 +5 V (I/O) A50 Key B50 Key
A20 AD30 B20 AD31 A51 Key B51 Key
A21 +3.3 V B21 AD29 A52 C/BE0# B52 AD08
A22 AD28 B22 Ground A53 +3.3 V B53 AD07
A23 AD26 B23 AD27 A54 AD06 B54 +3.3 V
A24 Ground B24 AD25 A55 AD04 B55 AD05
A25 AD24 B25 +3.3 V A56 Ground B56 AD03
A26 IDSEL B26 C/BE3# A57 AD02 B57 Ground
A27 +3.3 V B27 AD23 A58 AD00 B58 AD01
A28 AD22 B28 Ground A59 +5 V (I/O) B59 +5 V (I/O)
A29 AD20 B29 AD21 A60 REQ64# B60 ACK64#
A30 Ground B30 AD19 A61 +5 V B61 +5 V
A31 AD18 B31 +3.3 V A62 +5 V B62 +5 V
* These signals (in parentheses) are optional in the PCI specification and are not currently implemented.
** On PCI bus connector 1, this pin is connected to the SMBus clock line.
*** On PCI bus connector 1, this pin is connected to the SMBus data line.
A40 Reserved ** B40 PERR#
A42 Ground B42 SERR#
67
Intel Desktop Board D845MF/D845WR Technical Product Specification
Table 41. AGP Connector
Pin Signal Name Pin Signal Name Pin Signal Name Pin Signal Name
A1 +12 V B1 Not connected A34 Vddq B34 Vddq
A2 TYPEDET# B2 +5 V A35 AD22 B35 AD21
A3 Reserved B3 +5 V A36 AD20 B36 AD19
A4 Not connected B4 Not connected A37 Ground B37 Ground
A5 Ground B5 Ground A38 AD18 B38 AD17
A6 INTA# B6 INTB# A39 AD16 B39 C/BE2#
A7 RST# B7 CLK A40 Vddq B40 Vddq
A8 GNT1# B8 REQ# A41 FRAME# B41 IRDY#
A9 Vcc3.3 B9 Vcc3.3 A42 Reserved B42 +3.3 V (aux)
A10 ST1 B10 ST0 A43 Ground B43 Ground
A11 Reserved B11 ST2 A44 Reserved B44 Reserved
A12 PIPE# B12 RBF# A45 Vcc3.3 B45 Vcc3.3
A13 Ground B13 Ground A46 TRDY# B46 DEVSEL#
A14 WBF# B14 Reserved A47 STOP# B47 Vddq
A15 SBA1 B15 SBA0 A48 PME# B48 PERR#
A16 Vcc3.3 B16 Vcc3.3 A49 Ground B49 Ground
A17 SBA3 B17 SBA2 A50 PAR B50 SERR#
A18 SBSTB# B18 SB_STB A51 AD15 B51 C/BE1#
A19 Ground B19 Ground A52 Vddq B52 Vddq
A20 SBA5 B20 SBA4 A53 AD13 B53 AD14
A21 SBA7 B21 SBA6 A54 AD11 B54 AD12
A22 Reserved B22 Reserved A55 Ground B55 Ground
A23 Ground B23 Ground A56 AD9 B56 AD10
A24 Reserved B24 +3.3 V (aux) A57 C/BE0# B57 AD8
A25 Vcc3.3 B25 Vcc3.3 A58 Vddq B58 Vddq
A26 AD30 B26 AD31 A59 AD_STB0# B59 AD_STB0
A27 AD28 B27 AD29 A60 AD6 B60 AD7
A28 Vcc3.3 B28 Vcc3.3 A61 Ground B61 Ground
A29 AD26 B29 AD27 A62 AD4 B62 AD5
A30 AD24 B30 AD25 A63 AD2 B63 AD3
A31 Ground B31 Ground A64 Vddq B64 Vddq
A32 AD_STB1# B32 AD_STB1 A65 AD0 B65 AD1
A33 C/BE3# B33 AD23 A66 VRREFG_C B66 VREFC_G
NOTE
✏
The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy
3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V AGP
cards.
68
Table 42. PCI IDE Connectors
Pin Signal Name Pin Signal Name
1 Reset IDE 2 Ground
3 Data 7 4 Data 8
5 Data 6 6 Data 9
7 Data 5 8 Data 10
9 Data 4 10 Data 11
11 Data 3 12 Data 12
13 Data 2 14 Data 13
15 Data 1 16 Data 14
17 Data 0 18 Data 15
19 Ground 20 Key
21 DDRQ0 [DDRQ1] 22 Ground
23 I/O Write# 24 Ground
25 I/O Read# 26 Ground
27 IOCHRDY 28 Ground
29 DDACK0# [DDACK1#] 30 Ground
31 IRQ 14 [IRQ 15] 32 Not connected
33 DAG1 (Address 1) 34 GPIO_DMA66_Detect_Pri
35 DAG0 (Address 0) 36 DAG2 (Address 2)
37 Chip Select 1P# [Chip Select 1S#] 38 Chip Select 3P# [Chip Select 3S#]
39 Activity# 40 Ground
Signal names in brackets ([ ]) are for the secondary IDE connector.
Technical Reference
[GPIO_DMA66_Detect_Sec]
69
Intel Desktop Board D845MF/D845WR Technical Product Specification
Table 43. Diskette Drive Connector
Pin Signal Name Pin Signal Name
1 Ground 2 DENSEL
3 Key 4 Not connected
5 Key 6 DRVDEN1
7 Ground 8 FDINDX#
9 Ground 10 MTR0# (Motor Enable A)
11 Ground 12 Not connected
13 Ground 14 DS0# (Drive Select A)
15 Ground 16 Not connected
17 Not connected 18 DIR# (Stepper Motor Direction)
19 Ground 20 STEP# (Step Pulse)
21 Ground 22 WDATA# (Write Data)
23 Ground 24 WGATE# (Write Enable)
25 Ground 26 TRK0# (Track 0)
27 Not connected 28 WRTPRT# (Write Protect)
29 Ground 30 RDATA# (Read Data)
31 Ground 32 HDSEL# (Side 1 Select)
33 Ground 34 DSKCHG# (Diskette Change)
70
2.8.3 External I/O Connectors
Figure 15 shows the locations of the external I/O connectors.
2
B
1
10
9
Technical Reference
2
A
1
18
17
Item Description For more information see:
A Front panel Table 45
B Front panel USB Table 44
Figure 15. External I/O Connectors
OM13224
71
Intel Desktop Board D845MF/D845WR Technical Product Specification
Table 44. Front Panel USB Connector
Pin Signal Name Pin Signal Name
1 USB_FNT_PWR 2 USB_FNT_PWR
3 USB_FNT1# 4 USB_FNT2#
5 USB_FNT1 6 USB_FNT2
7 Ground 8 Ground
9 Key 10 Not connected
Table 45. Front Panel Connector
Pin Signal In/Out Description Pin Signal In/Out Description
Hard Drive Activity LED Power LED
1 HD_PWR Out Hard disk LED pull-
up (330 Ω) to +5 V
3 HDA# Out Hard disk active LED 4 HDR_BLNK_
Reset Switch On/Off Switch
5 Ground Ground 6 FPBUT_IN In Power switch
7 FP_RESET# In Reset switch 8 Ground Ground
Infrared Port Miscellaneous
9 +5 V Out IR Power 10 N/C Not connected
11 IRRX In IrDA serial input 12 Ground Ground
13 Ground Ground 14 (pin removed) Not connected
15 IRTX Out IrDA serial output 16 +5 V Out Power
2 HDR_BLNK_
GRN
YEL
Out Front panel green
LED
Out Front panel yellow
LED
2.8.3.1 Hard Drive Activity LED Connector
Pins 1 and 3 can be connected to an LED to provide a visual indicator that data is being read from
or written to a hard drive. For the LED to function properly, an IDE drive must be connected to
the onboard IDE interface.
72
Technical Reference
2.8.3.2 Power/Sleep/Message Waiting LED Connector
Pins 2 and 4 can be connected to a one- or two-color LED. Table 46 shows the possible states for
a one-color LED. Table 47 shows the possible states for a two-color LED.
Table 46. States for a One-Color Power LED
LED State Description
Off Power off/sleeping
Steady Green Running
Blinking Green Running/message waiting
Table 47. States for a Two-Color Power LED
LED State Description
Off Power off
Steady Green Running
Blinking Green Running/message waiting
Steady Yellow Sleeping
Blinking Yellow Sleeping/message waiting
✏ NOTE
To use the message waiting function, ACPI must be enabled in the operating system and a
message-capturing application must be invoked.
2.8.3.3 Reset Switch Connector
Pins 5 and 7 can be connected to a momentary SPST type switch that is normally open. When the
switch is closed, Desktop Board D845MF/D845WR resets and runs the POST.
2.8.3.4 Power Switch Connector
Pins 6 and 8 can be connected to a front panel momentary-contact power switch. The switch must
pull the SW_ON# pin to ground for at least 50 ms to signal the power supply to switch on or off.
(The time requirement is due to internal debounce circuitry on Desktop Board D845MF/D845WR.)
At least two seconds must pass before the power supply will recognize another on/off signal.
2.8.3.5 Infrared Port Connector
Serial port B can be configured to support an IrDA module connected to pins 9, 11, 13, and 15.
NOTE
✏
Configuring serial port B to support IrDA disables the serial port B connector on the back panel.
For information about Refer to
Infrared support Section 1.5, page 18
Configuring serial port B for infrared applications Section 4.4.3, page 102
73
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.9 Jumper Blocks
CAUTION
Do not move any jumpers with the power on. Always turn off the power and unplug the power
cord from the computer before changing a jumper setting. Otherwise, the board could be
damaged.
Figure 16 shows the location of the jumper blocks on Desktop Boards D845MF and D845WR.
10
9
A
2
1
3
B
Item Description Reference Designator
A Front panel audio connector/jumper block J6A3 (Desktop Board D845MF)
B BIOS Setup configuration jumper block J6H2 (Desktop Board D845MF)
1
J8A2 (Desktop Board D845WR)
J7H1 (Desktop Board D845WR)
OM13225
74
Figure 16. Location of the Jumper Blocks
Technical Reference
2.9.1 Front Panel Audio Connector/Jumper Block
This connector has two functions:
• With jumpers installed, the audio line out signals are routed to the back panel audio line out
connector.
• With jumpers removed, the connector provides audio line out and mic in signals for front panel
audio connectors.
Table 48 describes the two configurations of this connector/jumper block.
CAUTION
Do not place jumpers on this block in any configuration other than the one described in Table 48.
Other jumper configurations are not supported and could damage the board.
Table 48. Front Panel Audio Connector/Jumper Block
Jumper Setting Configuration
10
6
2
10
6
2
9
7
5
34
1
9
7
5
34
1
9 and 10
5 and 6
No jumpers
installed
Audio line out signals are routed to the back panel audio line out
connector. The back panel audio line out connector is shown in Figure 10
on page 53.
Audio line out and mic in signals are available for front panel audio
connectors. Table 30 on page 59 lists the names of the signals available
on this connector when no jumpers are installed.
NOTE
✏
When the jumpers are removed and this connector is used for front panel audio, the back panel
audio line out and mic in connectors are disabled.
75
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.9.2 BIOS Setup Configuration Jumper Block
The 3-pin jumper block determines the BIOS Setup program’s mode. Table 49 describes the
jumper settings for the three modes: normal, configure, and recovery. When the jumper is set to
configuration mode and the computer is powered-up, the BIOS compares the processor version and
the microcode version in the BIOS and reports if the two match.
Table 49. BIOS Setup Configuration Jumper Settings
Function/Mode Jumper Setting Configuration
Normal
1-2
Configure
2-3
Recovery
None
3
1
3
1
3
1
The BIOS uses current configuration information and
passwords for booting.
After the POST runs, Setup runs automatically. The
maintenance menu is displayed.
The BIOS attempts to recover the BIOS configuration. A
recovery diskette is required.
For information about Refer to
How to access the BIOS Setup program Section 4.1, page 95
The maintenance menu of the BIOS Setup program Section 4.2, page 96
BIOS recovery Section 3.7, page 91
76
Technical Reference
2.10 Mechanical Considerations
2.10.1 D845MF Form Factor
Desktop Board D845MF is designed to fit into an ATX-form-factor chassis. Figure 17 illustrates
the mechanical form factor for Desktop Board D845MF. Dimensions are given in inches
[millimeters]. The outer dimensions are 12.00 inches by 8.23 inches [304.800 millimeters by
209.042 millimeters]. Location of the I/O connectors and mounting holes are in compliance with
the ATX specification (see Section 1.5).
1.80
6.50
[165.10]
[45.72]
6.10
[154.94]
0.00
1.731
[43.97]
5.50
[139.7]
0.00
4.90
[124.46]
2.60
[66.04]
Figure 17. Desktop Board D845MF Dimensions
[157.48]
6.215
[157.86]
6.20
5.20
[132.08]
6.451
[163.86]
OM13238
77
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.10.2 D845WR Form Factor
Desktop Board D845WR is designed to fit into either a microATX or an ATX-form-factor chassis.
Figure 18 illustrates the mechanical form factor for Desktop Board D845WR. Dimensions are
given in inches [millimeters]. The outer dimensions are 9.60 inches by 8.23 inches
[243.840 millimeters by 209.042 millimeters]. Location of the I/O connectors and mounting holes
are in compliance with the ATX specification (see Section 1.5).
NOTE
✏
When installing the board in a microATX chassis, make sure that peripheral devices are installed
at least 1.5 inches above the main power connector, the diskette drive connector, and the IDE
connector, and the DIMM sockets.
6.50
[165.10]
6.10
[154.94]
5.20
[132.08]
0.00
1.731
[43.97]
3.151
[80.04]
2.60
[66.04]
1.80
[45.72]
Figure 18. Desktop Board D845WR Dimensions
0.00
6.20
[157.48]
6.451
[163.86]
OM13226
78
Technical Reference
2.10.3 I/O Shield
The back panel I/O shield for Desktop Boards D845MF and D845WR must meet specific
dimension and material requirements. Systems based on this board need the back panel I/O shield
to pass certification testing. An I/O shield is available from this third-party vendor:
Foxconn Electronics, part number 2D244-002.
For information about Refer to
Foxconn Electronics http://www.foxconn.com
The ATX form factor specification Section 1.5, page 18
2.11 Electrical Considerations
2.11.1 Power Consumption
Table 50 lists voltage and current measurements for a computer that contains the
D845MF/D845WR board and the following:
• 2.0 GHz Intel Pentium 4 processor with a 256 KB cache
• 32 MB AGP card
• 1.0 GB PC266 DDR SDRAM
• 3.5-inch diskette drive
• 15 GB IDE hard disk drive
• 24 X IDE CD-ROM drive
This information is provided only as a guide for calculating approximate power usage with
additional resources added.
Values for the Windows XP desktop mode are measured at 1024 x 768 x true color (32 bit) and
75 Hz refresh rate. AC watts are measured while the computer is connected to a typical 300 W
power supply, at nominal input voltage and frequency, with a true RMS wattmeter at the line input.
✏ NOTE
Actual system power consumption depends upon system configuration. The power supply should
comply with the recommendations found in the ATX/ATX12V Power Supply Design Guide,
Version 1.1 (see Section 1.5 on page 18 for specification information).
Table 50. Power Usage
DC Current at:
Mode AC Power +3.3 V +5 V +12 V -12 V +5 VSB
ACPI S0 83.2 W 5.1 A 0.59 A 2.22 A 0.094 A 0.389 A
ACPI S1 62.8 W 4.6 A 0.06 A 1.21 A 0.040 A 0.379 A
ACPI S3 3.9 W 0.063 A 0.0164 A 0.015 A 0.011 A 0.350 A
APM full on 83.2 W 5.1 A 0.59 A 2.22 A 0.094 A 0.389 A
APM Suspend 44.0 W 3.62 A 0.59 A 0.98 A 0.094 A 0.360 A
79
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.11.2 Add-in Board Considerations
Desktop Boards D845MF and D845WR are designed to provide 2 A (average) of +5 V current for
each add-in board. The total +5 V current draw for add-in boards is as follows:
• For a fully loaded Desktop Board D845MF (all seven expansion slots filled), the total +5 V
current draw must not exceed 14 A.
• For a fully loaded Desktop Board D845WR (all four expansion slots filled), the total +5 V
current draw must not exceed 8 A.
2.11.3 Standby Current Requirements
CAUTION
If the standby current necessary to support multiple wake events from the PCI and/or USB buses
exceeds power supply capacity, Desktop Boards D845MF and D845WR may lose register settings
stored in memory, etc. Calculate the standby current requirements using the steps described
below.
Power supplies used with Desktop Boards D845MF and D845WR must be able to provide enough
standby current to support the Instantly Available PC (ACPI S3 sleep state) configuration as
outlined in Table 51.
Values are determined by specifications such as PCI 2.2. Actual measured values may vary.
To estimate the amount of standby current required for a particular system configuration, standby
current requirements of all installed components must be added to determine the total standby
current requirement. Refer to the descriptions in Table 51 and review the following steps.
1. Note the total Desktop Board D845MF or D845WR standby current requirement.
2. Add to that the total PS/2 port standby current requirement if a wake-enabled device is
connected.
3. Add, from the PCI 2.2 slots (wake enabled) row, the total number of wake-enabled devices
installed (PCI and AGP) and multiply by the standby current requirement.
4. Add, from the PCI 2.2 slots (nonwake enabled) row, the total number of wake-enabled devices
installed (PCI and AGP) and multiply by the standby current requirement.
5. Add all additional wake-enabled devices’ and nonwake-enabled devices’ standby current
requirements as applicable.
6. Add all the required current totals from steps 1 through 5 to determine the total estimated
standby current power supply requirement.
80
Table 51. Standby Current Requirements
Instantly Available PC Current
Support (Estimated for
Integrated Board Components)
Instantly Available PC Stand-by
Current Support
• Estimated for add-on
components
• Add to Instantly Available
PC total current
requirement
(See instructions above)
Note: Dependent upon system configuration
NOTE
✏
Description
Total for Desktop Board D845MF 395
PS/2 ports
PCI 2.2 slots (wake enabled) 375
PCI 2.2 slots (nonwake enabled) 20
USB ports
IBM PS/2 Port Specification (Sept 1991) states:
• 275 mA for keyboard
• 70 mA for the mouse (nonwake-enable device)
Technical Reference
Standby Current
Requirements (mA)
(Note)
345
(Note)
500
PCI/AGP requirements are calculated by totaling the following:
• One wake-enabled device @ 375 mA, plus
• Five nonwake-enabled devices @ 20 mA each, plus
USB requirements are calculated as:
• One wake-enabled device @ 500 mA
• USB hub @ 100 mA
• Three USB nonwake-enabled devices connected @ 2.5 mA each
NOTE
✏
Both USB ports are capable of providing up to 500 mA during normal G0/S0 operation. Only one
USB port will support up to 500 mA of stand-by-current (wake-enabled device) during G1/S3
suspended operation. The other port may provide up to 7.5 mA (three nonwake-enabled devices)
during G1/S3 suspended operation.
2.11.4 Fan Connector Current Capability
Table 52 lists the current capability of the fan connectors on Desktop Boards D845MF and
D845WR.
Table 52. Fan Connector Current Capability
Fan Connector Maximum Available Current
Processor fan 1.00 A
Front chassis fan 0.50 A
Rear chassis fan 0.35 A
81
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.11.5 Power Supply Considerations
CAUTION
The +5 V standby line for the power supply must be capable of providing adequate +5 V standby
current. Failure to do so can damage the power supply. The total amount of standby current
required depends on the wake devices supported and manufacturing options. Refer to
Section 2.11.3 on page 80 for additional information.
System integrators should refer to the power usage values listed in Table 50 when selecting a
power supply for use with Desktop Board D845MF or D845WR.
Measurements account only for current sourced by Desktop Board D845MF or D845WR while
running in idle modes of the started operating systems.
Additional power required will depend on configurations chosen by the integrator.
The power supply must comply with the following recommendations found in the indicated
sections of the ATX form factor specification.
• The potential relation between 3.3 VDC and +5 VDC power rails (Section 4.2)
• The current capability of the +5 VSB line (Section 4.2.1.2)
• All timing parameters (Section 4.2.1.3)
• All voltage tolerances (Section 4.2.2)
For information about Refer to
The ATX form factor specification
Section 1.5, page 18
2.12 Thermal Considerations
CAUTION
Ensure that the ambient temperature does not exceed the board’s maximum operating temperature.
Failure to do so could cause components to exceed their maximum case temperature and
malfunction. For information about the maximum operating temperature, see the environmental
specifications in Section 2.14.
CAUTION
Ensure that proper airflow is maintained in the processor voltage regulator circuit. Failure to do
so may result in damage to the voltage regulator circuit. The processor voltage regulator area
(item A in Figure 19) can reach a temperature of up to 85
o
C in an open chassis.
82
Figure 19 shows the locations of the localized high temperature zones.
Technical Reference
Item Description
A Processor voltage regulator area
B Processor
C Intel 82845 MCH
D Intel 82801BA ICH2
Figure 19. Localized High Temperature Zones
Table 53 provides maximum case temperatures for Desktop Board D845MF/D845WR 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 Desktop Board D845MF/D845WR.
Table 53. Thermal Considerations for Components
Component Maximum Case Temperature
Intel Pentium 4 processor For processor case temperature, see processor datasheets and
processor specification updates
Intel 82845 MCH 83 oC (under bias)
Intel 82801BA ICH2 109 oC (under bias)
For information about Refer to
Intel Pentium 4 processor datasheets and specification updates Section 1.3, page 17
83
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.13 Reliability
The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates. The calculation is based on the Bellcore Reliability Prediction
Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF prediction is used to estimate
repair rates and spare parts requirements.
The MTBF data is calculated from predicted data at 55 ºC. The MTBF calculations for the boards
are as follows:
• Desktop Board D845MF MTBF: 141394.5176 hours
• Desktop Board D845WR MTBF: 142127.0161 hours
2.14 Environmental
Table 54 lists the environmental specifications for Desktop Boards D845MF and D845WR.
Table 54. Desktop Board D845MF/D845WR Environmental Specifications
Parameter Specification
Temperature
Non-Operating -40 °C to +70 °C
Operating 0 °C to +55 °C
Shock
Unpackaged 50 g trapezoidal waveform
Velocity change of 170 inches/second
Packaged Half sine 2 millisecond
Product Weight (pounds) Free Fall (inches) Velocity Change (inches/sec)
<20 36 167
21-40 30 152
41-80 24 136
81-100 18 118
Vibration
Unpackaged 5 Hz to 20 Hz: 0.01 g² Hz sloping up to 0.02 g² Hz
20 Hz to 500 Hz: 0.02 g² Hz (flat)
Packaged 10 Hz to 40 Hz: 0.015 g² Hz (flat)
40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz
84
Technical Reference
2.15 Regulatory Compliance
This section describes the compliance of Desktop Boards D845MF and D845WR with U.S. and
international safety and electromagnetic compatibility (EMC) regulations.
2.15.1 Safety Regulations
Table 55 lists the safety regulations Desktop Boards D845MF and D845WR comply with when
correctly installed in a compatible host system.
Table 55. Safety Regulations
Regulation Title
CSA C22.2 No. 60950/
UL 60950, 3
EN 60950, 2nd Edition, 1992
(with Amendments 1, 2, 3, and 4)
IEC 60950, 2nd Edition, 1991
(with Amendments 1, 2, 3, and 4)
EMKO-TSE (74-SEC) 207/94 Summary of Nordic deviations to EN 60950. (Norway, Sweden,
rd
Edition, 2000
Bi-National Standard for Safety of Information Technology Equipment
including Electrical Business Equipment. (USA and Canada)
The Standard for Safety of Information Technology Equipment including
Electrical Business Equipment. (European Union)
The Standard for Safety of Information Technology Equipment including
Electrical Business Equipment. (International)
Denmark, and Finland)
2.15.2 EMC Regulations
Table 56 lists the EMC regulations Desktop Boards D845MF and D845WR comply with when
correctly installed in a compatible host system.
Table 56. 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)
85
Intel Desktop Board D845MF/D845WR Technical Product Specification
2.15.3 Product Certification Markings (Board Level)
Desktop Boards D845MF and D845WR have the following product certification markings:
• UL joint US/Canada Recognized Component mark: Consists of lower case c followed by a
stylized backward UR and followed by a small US. Includes adjacent UL file number for
®
Desktop Boards: E210882 (component side).
Intel
• FCC Declaration of Conformity logo mark for Class B equipment; to include Intel name and
Desktop Boards D845MF and D845WR model designation (solder side).
• CE mark: Declaring compliance to European Union (EU) EMC directive (89/336/EEC) and
Low Voltage directive (73/23/EEC) (component side). The CE mark should also be on the
shipping container.
• Australian Communications Authority (ACA) C-Tick mark: consists of a stylized C overlaid
with a check (tick) mark (component side), followed by Intel supplier code number, N-232.
The C-tick mark should also be on the shipping container.
• Korean EMC certification logo mark: consists of MIC lettering within a stylized elliptical
outline.
• Printed wiring board manufacturer’s recognition mark: consists of a unique UL recognized
manufacturer’s logo, along with a flammability rating (94V-0) (solder side).
• PB part number: Intel bare circuit board part number (solder side). Also includes SKU
number starting with AA followed by additional alphanumeric characters.
For Desktop Board D845MF, the PB number A79197-002.
For Desktop Board D845WR, the PB number is A71648-004.
• Battery “+ Side Up” marking: located on the component side of the board in close proximity
to the battery holder.
86
3 Overview of BIOS Features
What This Chapter Contains
3.1 Introduction.................................................................................................................87
3.2 BIOS Flash Memory Organization ..............................................................................88
3.3 Resource Configuration..............................................................................................88
3.4 System Management BIOS (SMBIOS).......................................................................89
3.5 Legacy USB Support..................................................................................................89
3.6 BIOS Updates ............................................................................................................90
3.7 Recovering BIOS Data ...............................................................................................91
3.8 Boot Options...............................................................................................................92
3.9 Fast Booting Systems with Intel® Rapid BIOS Boot....................................................92
3.10 BIOS Security Features..............................................................................................94
3.1 Introduction
Desktop Boards D845MF and D845WR use an Intel/AMI BIOS that is stored in the Firmware Hub
(FWH) and can be updated using a disk-based program. The FWH contains the BIOS Setup
program, POST, the PCI auto-configuration utility, and Plug and Play support.
Desktop Boards D845MF and D845WR support system BIOS shadowing, allowing the BIOS to
execute from 64-bit onboard write-protected system memory.
The BIOS displays a message during POST identifying the type of BIOS and a revision code. The
initial production BIOSs are identified as WR84510A.86A.
When the board’s jumper is set to configuration mode and the computer is powered-up, the BIOS
compares the CPU version and the microcode version in the BIOS and reports if the two match.
For information about Refer to
The compliance level of Desktop Boards D845MF and D845WR with Plug and Play Section 1.5, page 18
87
Intel Desktop Board D845MF/D845WR Technical Product Specification
3.2 BIOS Flash Memory Organization
The Intel 82802AB Firmware Hub (FWH) includes a 4 Mbit (512 KB) symmetrical flash memory
device. Internally, the device is grouped into eight 64-KB blocks that are individually erasable,
lockable, and unlockable.
3.3 Resource Configuration
3.3.1 PCI Autoconfiguration
The BIOS can automatically configure PCI devices. PCI devices may be onboard or add-in cards.
Autoconfiguration lets a user insert or remove PCI cards without having to configure the system.
When a user turns on the system after adding a PCI card, the BIOS automatically configures
interrupts, the I/O space, and other system resources. Any interrupts set to Available in Setup are
considered to be available for use by the add-in card. Autoconfiguration information is stored in
ESCD format.
For information about the versions of PCI and Plug and Play supported by the BIOS, see
Section 1.5.
3.3.2 PCI IDE Support
If you select Auto in the BIOS Setup program, the BIOS automatically sets up the two
PCI IDE connectors with independent I/O channel support. The IDE interface supports hard drives
up to ATA-66/100 and recognizes any ATAPI compliant devices, including CD-ROM drives, tape
drives, and Ultra DMA drives (see Section 1.5 for the supported version of ATAPI). The BIOS
determines the capabilities of each drive and configures them to optimize capacity and
performance. To take advantage of the high capacities typically available today, hard drives are
automatically configured for Logical Block Addressing (LBA) and to PIO Mode 3 or 4, depending
on the capability of the drive. You can override the auto-configuration options by specifying
manual configuration in the BIOS Setup program.
To use ATA-66/100 features the following items are required:
• An ATA-66/100 peripheral device
• An ATA-66/100 compatible cable
• ATA-66/100 operating system device drivers
NOTE
✏
ATA-66/100 compatible cables are backward compatible with drives using slower IDE transfer
protocols. If an ATA-66/100 disk drive and a disk drive using any other IDE transfer protocol are
attached to the same cable, the maximum transfer rate between the drives is reduced to that of the
slowest device.
NOTE
✏
Do not connect an ATA device as a slave on the same IDE cable as an ATAPI master device. For
example, do not connect an ATA hard drive as a slave to an ATAPI CD-ROM drive.
88
Overview of BIOS Features
3.4 System Management BIOS (SMBIOS)
SMBIOS is a Desktop Management Interface (DMI) compliant method for managing computers in
a managed network.
The main component of SMBIOS is the Management Information Format (MIF) database, which
contains information about the computing system and its components. Using SMBIOS, a system
administrator can obtain the system types, capabilities, operational status, and installation dates for
system components. The MIF database defines the data and provides the method for accessing this
information. The BIOS enables applications such as third-party management software to use
SMBIOS. The BIOS stores and reports the following SMBIOS information:
• BIOS data, such as the BIOS revision level
• Fixed-system data, such as peripherals, serial numbers, and asset tags
• Resource data, such as memory size, cache size, and processor speed
• Dynamic data, such as event detection and error logging
Non-Plug and Play operating systems, such as Windows NT, require an additional interface for
obtaining the SMBIOS information. The BIOS supports an SMBIOS table interface for such
operating systems. Using this support, an SMBIOS service-level application running on a
non-Plug and Play operating system can obtain the SMBIOS information.
For information about Refer to
The compliance level of Desktop Boards D845MF and D845WR with SMBIOS Section 1.5, page 18
3.5 Legacy USB Support
Legacy USB support enables USB devices such as keyboards, mice, and hubs to be used even
when the operating system’s USB drivers are not yet available. Legacy USB support is used to
access the BIOS Setup program, and to install an operating system that supports USB. By default,
Legacy USB support is set to Enabled.
Legacy USB support operates as follows:
1. When you apply power to the computer, legacy support is disabled.
2. POST begins.
3. Legacy USB support is enabled by the BIOS allowing you to use a USB keyboard to enter and
configure the BIOS Setup program and the maintenance menu.
4. POST completes.
89
Intel Desktop Board D845MF/D845WR Technical Product Specification
5. The operating system loads. While the operating system is loading, USB keyboards and mice
are recognized and may be used to configure the operating system. (Keyboards and mice are
not recognized during this period if Legacy USB support was set to Disabled in the BIOS
Setup program.)
6. After the operating system loads the USB drivers, all legacy and non-legacy USB devices are
recognized by the operating system, and Legacy USB support from the BIOS is no longer
used.
To install an operating system that supports USB, verify that Legacy USB support in the BIOS
Setup program is set to Enabled and follow the operating system’s installation instructions.
NOTE
✏
Legacy USB support is for keyboards, mice, and hubs only. Other USB devices are not supported
in legacy mode.
3.6 BIOS Updates
The BIOS can be updated using either of the following utilities, which are available on the Intel
World Wide Web site:
®
• Intel
• 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.
®
Flash Memory Update Utility, which requires creation of a boot diskette and manual
rebooting of the system. Using this utility, the BIOS can be updated from a file on a 1.44 MB
diskette (from a legacy diskette drive or an LS-120 diskette drive) or a CD-ROM.
Both utilities support the following BIOS maintenance functions:
• Verifying that the updated BIOS matches the target system to prevent accidentally installing
an incompatible BIOS.
• Updating both the BIOS boot block and the main BIOS. This process is fault tolerant to
prevent boot block corruption.
• Updating the BIOS boot block separately.
• Changing the language section of the BIOS.
• Updating replaceable BIOS modules, such as the video BIOS module.
• Inserting a custom splash screen.
NOTE
✏
Review the instructions distributed with the upgrade utility before attempting a BIOS update.
For information about Refer to
The Intel World Wide Web site Section 1.3, page 17
90
Overview of BIOS Features
3.6.1 Language Support
The BIOS Setup program and help messages are supported in five languages: US English,
German, Italian, French, and Spanish. The default language is US English, which is present unless
another language is selected in the BIOS Setup program.
3.6.2 Custom Splash Screen
During POST, an Intel splash screen is displayed by default. This splash screen can be replaced
with a custom splash screen. A utility is available from Intel to assist with creating a custom
splash screen. The custom splash screen can be programmed into the flash memory using the
BIOS upgrade utility. Information about this capability is available on the Intel Support World
Wide Web site.
For information about Refer to
The Intel World Wide Web site Section 1.3, page 17
3.7 Recovering BIOS Data
Some types of failure can destroy the BIOS. For example, the data can be lost if a power outage
occurs while the BIOS is being updated in flash memory. The BIOS can be recovered from a
diskette using the BIOS recovery mode. When recovering the BIOS, be aware of the following:
• Because of the small amount of code available in the non-erasable boot block area, there is no
video support. You can only monitor this procedure by listening to the speaker or looking at
the diskette drive LED.
• The recovery process may take several minutes; larger BIOS flash memory devices require
more time.
• Two beeps and the end of activity in the diskette drive indicate successful BIOS recovery.
• A series of continuous beeps indicates a failed BIOS recovery.
To create a BIOS recovery diskette, a bootable diskette must be created and the BIOS update files
copied to it. BIOS upgrades and the Intel Flash Memory Update Utility are available from Intel
Technical Support through the Intel World Wide Web site.
NOTE
✏
Even if the computer is configured to boot from an LS-120 diskette (in the Setup program’s
Removable Devices submenu), the BIOS recovery diskette must be a standard 1.44 MB diskette not
a 120 MB diskette.
For information about Refer to
The BIOS recovery mode jumper settings Section 2.9.2, page 76
The Boot menu in the BIOS Setup program Section 4.7, page 114
Intel technical support on the Intel World Wide Web site http://support.intel.com/
91
Intel Desktop Board D845MF/D845WR Technical Product Specification
3.8 Boot Options
In the BIOS Setup program, the user can choose to boot from a diskette drive, hard drives,
CD-ROM, or the network. The default setting is for the diskette drive to be the first boot device,
the hard drive second, and the ATAPI CD-ROM third. The fourth device is disabled.
3.8.1 CD-ROM and Network 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.
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.
For information about Refer to
The El Torito specification Section 1.5, page 18
3.8.2 Booting Without Attached Devices
For use in embedded applications, the BIOS has been designed so that after passing the POST, the
operating system loader is invoked even if the following devices are not present:
• Video adapter
• Keyboard
• Mouse
3.9 Fast Booting Systems with Intel® Rapid BIOS Boot
These factors affect system boot speed:
• Selecting and configuring peripherals properly
®
• Using an optimized BIOS, such as the Intel
3.9.1 Peripheral Selection and Configuration
The following techniques help improve system boot speed:
• Choose a hard drive with parameters such as “power-up to data ready” less than eight seconds,
that minimize hard drive startup delays.
• Select a CD-ROM drive with a fast initialization rate. This rate can influence POST
execution time.
• Eliminate unnecessary add-in adapter features, such as logo displays, screen repaints, or mode
changes in POST. These features may add time to the boot process.
• Try different monitors. Some monitors initialize and communicate with the BIOS more
quickly, which enables the system to boot more quickly.
Rapid BIOS
92
Overview of BIOS Features
3.9.2 Intel Rapid BIOS Boot
Use of the following BIOS Setup program settings reduces the POST execution time.
In the Boot Menu:
• Set the hard disk drive as the first boot device. As a result, the POST does not first seek a
diskette drive, which saves about one second from the POST execution time.
• Disable Quiet Boot, which eliminates display of the logo splash screen. This could save
several seconds of painting complex graphic images and changing video modes.
• Enabled Intel Rapid BIOS Boot. This feature bypasses memory count and the search for a
diskette drive.
In the Peripheral Configuration submenu, disable the LAN device if it will not be used. This can
reduce up to four seconds of option ROM boot time.
NOTE
✏
It is possible to optimize the boot process to the point where the system boots so quickly that the
Intel logo screen (or a custom logo splash screen) will not be seen. Monitors and hard disk drives
with minimum initialization times can also contribute to a boot time that might be so fast that
necessary logo screens and POST messages cannot be seen.
This boot time may be so fast that some drives might be not be initialized at all. If this condition
should occur, it is possible to introduce a programmable delay ranging from three to 30 seconds
(using the Hard Disk Pre-Delay feature of the Advanced Menu in the IDE Configuration Submenu
of the BIOS Setup program).
For information about Refer to
IDE Configuration Submenu in the BIOS Setup program Section 4.4.4, page 105
93
Intel Desktop Board D845MF/D845WR Technical Product Specification
3.10 BIOS Security Features
The BIOS includes security features that restrict access to the BIOS Setup program and who can
boot the computer. A supervisor password and a user password can be set for the BIOS Setup
program and for booting the computer, with the following restrictions:
• The supervisor password gives unrestricted access to view and change all the Setup options in
the BIOS Setup program. This is the supervisor mode.
• The user password gives restricted access to view and change Setup options in the BIOS Setup
program. This is the user mode.
• If only the supervisor password is set, pressing the <Enter> key at the password prompt of the
BIOS Setup program allows the user restricted access to Setup.
• If both the supervisor and user passwords are set, users can enter either the supervisor
password or the user password to access Setup. Users have access to Setup respective to
which password is entered.
• Setting the user password restricts who can boot the computer. The password prompt will be
displayed before the computer is booted. If only the supervisor password is set, the computer
boots without asking for a password. If both passwords are set, the user can enter either
password to boot the computer.
Table 57 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 57. Supervisor and User Password Functions
Password Set
Neither Can change all
Supervisor
only
User only N/A Can change all
Supervisor
and user set
Note: If no password is set, any user can change all Setup options.
Supervisor
Mode
options
Can change all
options
Can change all
options
(Note)
User Mode Setup Options
Can change all
options
Can change a
limited number
of options
options
Can change a
limited number
of options
(Note)
None None None
Supervisor Password Supervisor None
Enter Password
Clear User Password
Supervisor Password
Enter Password
Password to
Enter Setup
User User
Supervisor or
user
Password
During Boot
Supervisor or
user
For information about Refer to
Setting user and supervisor passwords Section 4.5, page 111
94
4 BIOS Setup Program
What This Chapter Contains
4.1 Introduction.................................................................................................................95
4.2 Maintenance Menu.....................................................................................................96
4.3 Main Menu..................................................................................................................98
4.4 Advanced Menu..........................................................................................................99
4.5 Security Menu ..........................................................................................................111
4.6 Power Menu .............................................................................................................112
4.7 Boot Menu................................................................................................................114
4.8 Exit Menu .................................................................................................................117
4.1 Introduction
The BIOS Setup program can be used to view and change the BIOS settings for the computer. The
BIOS Setup program is accessed by pressing the <F2> key after the Power-On Self-Test (POST)
memory test begins and before the operating system boot begins. The menu bar is shown below.
Maintenance Main Advanced Security Power Boot Exit
Table 58 lists the BIOS Setup program menu features.
Table 58. BIOS Setup Program Menu Bar
Maintenance Main Advanced Security Power Boot Exit
Clears
passwords and
BIS credentials
and enables
extended
configuration
mode
Allocates
resources for
hardware
components
Configures
advanced
features
available
through the
chipset
Sets
passwords
and security
features
Configures
power
management
features
Selects boot
options and
power supply
controls
For information about Refer to
Boot Integrity Services (BIS) Section 1.5, page 18
Saves or
discards
changes to
Setup
program
options
NOTE
✏
In this chapter, all examples of the BIOS Setup program menu bar include the maintenance menu;
however, the maintenance menu is displayed only when the board is in configuration mode.
Section 2.9 on page 74 tells how to put the board in configuration mode.
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Intel Desktop Board D845MF/D845WR Technical Product Specification
Table 59 lists the function keys available for menu screens.
Table 59. BIOS Setup Program Function Keys
BIOS Setup Program Function Key Description
<←> or <→> Selects a different menu screen (Moves the cursor left or right)
<↑> or <↓> Selects an item (Moves the cursor up or down)
<Tab> Selects a field (Not implemented)
<Enter> Executes command or selects the submenu
<F9> Load the default configuration values for the current menu
<F10> Save the current values and exits the BIOS Setup program
<Esc> Exits the menu
4.2 Maintenance Menu
To access this menu, select Maintenance on the menu bar at the top of the screen.
Maintenance
Extended Configuration
The menu shown in Table 60 is for clearing Setup passwords and enabling extended configuration
mode. Setup only displays this menu in configuration mode. See Section 2.9 on page 74 for
configuration mode setting information.
Main Advanced Security Power Boot Exit
Table 60. Maintenance Menu
Feature Options Description
Clear All Passwords • Yes (default)
• No
Clear BIS Credentials • Yes (default)
• No
Extended
Configuration
CPU Information No options Displays CPU Information.
CPU Stepping
Signature
CPU Microcode
Update Revision
• Default (default)
• User-Defined
No options Displays CPU’s Stepping Signature.
No options Displays CPU’s Microcode Update Revision.
Clears the user and supervisor passwords.
Clears the Wired for Management Boot Integrity Service (BIS)
credentials.
Invokes the Extended Configuration submenu.
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BIOS Setup Program
4.2.1 Extended Configuration Submenu
To access this submenu, select Maintenance on the menu bar and then Extended Configuration.
Maintenance
Extended Configuration
The submenu represented by Table 61 is for setting video memory cache mode. This submenu
becomes available when User Defined is selected under Extended Configuration.
Table 61. Extended Configuration Submenu
Feature Options Description
Extended Configuration • Default
Video Memory Cache Mode • USWC
SDRAM Auto-Configuration • Auto
CAS# Latency • 3
SDRAM RAS# to CAS#
Delay
SDRAM RAS# Precharge • 3
SDRAM RAS# Active to
Precharge
Main Advanced Security Power Boot Exit
User Defined allows setting memory control and video
(default)
• User Defined
• UC (default)
(default)
• User Defined
• 2
• Auto
(default)
• 3
• 2
• Auto
(default)
• 2
• Auto
(default)
• 7
• 6
• 5
• Auto
(default)
memory cache mode. If selected here, will also display in
the Advanced Menu as: “Extended Menu: Used.”
Selects Uncacheable Speculative Write-Combining
(USWC) video memory cache mode. Full 32 byte contents
of the Write Combining buffer are written to memory as
required. Cache lookups are not performed. Both the
video driver and the application must support Write
Combining.
Selects UnCacheable (UC) video memory cache mode.
This setting identifies the video memory range as
uncacheable by the processor. Memory writes are
performed in program order. Cache lookups are not
performed. Well suited for applications not supporting
Write Combining.
Sets extended memory configuration options to Auto or
User Defined.
Selects the number of clock cycles required to address a
column in memory.
Selects the number of clock cycles between addressing a
row and addressing a column.
Selects the length of time required before accessing a
new row.
Corresponds to tRAS.
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Intel Desktop Board D845MF/D845WR Technical Product Specification
4.3 Main Menu
To access this menu, select Main on the menu bar at the top of the screen.
Maintenance
Main
Table 62 describes the Main menu. This menu reports processor and memory information and is
for configuring the system date and system time.
Table 62. Main Menu
Feature Options Description
BIOS Version No options Displays the version of the BIOS.
Processor Type No options Displays processor type.
Processor Speed No options Displays processor speed.
System Bus Speed No options Displays the system bus speed.
Cache RAM No options Displays the size of second-level cache and whether it is
Total Memory No options Displays the total amount of RAM.
Memory Bank 0
Memory Bank 1
Language • English (default)
Memory
Configuration
System Time Hour, minute, and
System Date Day of week
No options Displays the amount and type of RAM in the memory
• Español
• Deutsch
• Italiano
• Français
• Non-ECC
• ECC (default)
second
Month/day/year
Advanced Security Power Boot Exit
ECC-capable.
banks.
Selects the current default language used by the BIOS.
Allows the user to enable error reporting if the system and
all installed memory support ECC. If non-ECC memory is
installed, BIOS will detect and change the setting to
Non-ECC.
Specifies the current time.
Specifies the current date.
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BIOS Setup Program
4.4 Advanced Menu
To access this menu, select Advanced on the menu bar at the top of the screen.
Maintenance Main
Advanced
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
Table 63 describes the Advanced Menu. This menu is used for setting advanced features that are
available through the chipset.
Table 63. Advanced Menu
Feature Options Description
Extended Configuration No options If Used is displayed, User-Defined has been selected in
PCI Configuration Select to display
submenu
Boot Configuration Select to display
submenu
Peripheral Configuration Select to display
submenu
IDE Configuration Select to display
submenu
Diskette Configuration Select to display
submenu
Event Log Configuration Select to display
submenu
Video Configuration Select to display
submenu
Security Power Boot Exit
Extended Configuration under the Maintenance Menu.
Configures individual PCI slot’s IRQ priority.
Configures Plug and Play and the Numlock key, and resets
configuration data.
Configures peripheral ports and devices.
Specifies type of connected IDE devices.
Configures the diskette drive.
Configures event logging.
Configures video features.
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Intel Desktop Board D845MF/D845WR Technical Product Specification
4.4.1 PCI Configuration Submenu
To access this submenu, select Advanced on the menu bar and then PCI Configuration.
Maintenance Main
Advanced
PCI Configuration
Boot Configuration
Peripheral Configuration
IDE Configuration
Diskette Configuration
Event Log Configuration
Video Configuration
The submenu shown in Table 64 is used to configure the IRQ priority of PCI slots individually.
Table 64. PCI Configuration Submenu
Feature Options Description
PCI Slot1 IRQ Priority
(Note 1)
PCI Slot2 IRQ Priority
(Note 1)
PCI Slot3 IRQ Priority
(Note 1)
PCI Slot4 IRQ Priority
(Note 1 and Note 2)
PCI Slot5 IRQ Priority
(Note 1 and Note 2)
PCI Slot6 IRQ Priority
(Note 1 and Note 2)
Notes:
1. Additional interrupts may be available if certain onboard devices (such as the serial and parallel ports) are disabled.
2. This option appears only on Desktop Board D845MF.
• Auto (default)
• 9
• 10
• 11
• Auto (default)
• 9
• 10
• 11
• Auto (default)
• 9
• 10
• 11
• Auto (default)
• 9
• 10
• 11
No options Displays the IRQ for PCI bus connector 5. This IRQ will
No options Displays the IRQ for PCI bus connector 6. This IRQ will
Security Power Boot Exit
Allows selection of IRQ priority for PCI bus connector 1.
Allows selection of IRQ priority for PCI bus connector 2.
Allows selection of IRQ priority for PCI bus connector 3.
Allows selection of IRQ priority for PCI bus connector 4.
be the same as the setting selected for PCI bus
connector 1. (PCI bus connectors 1 and 5 share the
same interrupt.)
be the same as the setting selected for PCI bus
connector 4. (PCI bus connectors 4 and 6 share the
same interrupt.)
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