Intel BOXD850EMD2L - 850E 478PIN MAX-2GB UATX 3PCI User manual

Intel®Desktop Board
D850EMD2/D850EMV2
Technical Product Specification
April 2002
Order Number: A94395-001
The Intel®Desktop Boards D850EMD2/D850EMV2 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 D850EMD2/D850EMV2 Specification Update.

Revision History
Revision Revision History Date
-001 First release of the Intel®Desktop Board D850EMD2/D850EMV2
Technical Product Specification.
April 2002
This product specification applies to only standard desktop boards D850EMD2 and D850EMV2
with BIOS identifier MV85010A.86A.
Changes to this specification will be published in the Intel Desktop Board
D850EMD2/D850EMV2 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.
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rights that relate to the presented subject matter. The furnishing of documents and other materials and information does
not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other
intellectual property rights.
Intel products are not intended for use in medical, life saving, or life sustaining applications or for any other application in
which the failure of the Intel product could create a situation where personal injury or death may occur.
Intel may make changes to specifications, product descriptions, and plans at any time, without notice.
The Intel®Desktop Boards D850EMD2 and D850EMV2 may contain design defects or errors known as errata which may
cause the product to deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be
obtained from:
Intel Corporation
P.O. Box 5937
Denver, CO 80217-9808
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.

iii
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
power and environmental requirements, and the BIOS for these Intel desktop boards: D850EMD2
and D850EMV2. It describes the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the desktop boards
D850EMD2 and D850EMV2 and their components to the vendors, system integrators, and other
engineers and technicians who need this level of information. It is specifically not intended for
general audiences.
What This Document Contains
Chapter Description
1 A description of the hardware used on the desktop boards D850EMD2 and
D850EMV2
2 A map of the resources of the desktop 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, POST codes, and diagnostic
LEDs
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.

Intel Desktop Board D850EMD2/D850EMV2 Technical Product Specification
iv
Other Common Notation
# Used after a signal name to identify an active-low signal (such as USB#).
(NxnX) When used in the description of a component, Nindicates the component type, xn are the
relative coordinates of its location on the desktop board, and Xis 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 other names and brands may be claimed as the property of
others.

v
Contents
1Product 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 ...........................................................................................................18
1.4 Operating System Support .........................................................................................18
1.5 Design Specifications .................................................................................................19
1.6 Processor ...................................................................................................................22
1.7 System Memory .........................................................................................................23
1.7.1 Memory Features .........................................................................................23
1.7.2 Continuity RIMM Modules ............................................................................23
1.7.3 RDRAM Memory Configuration ....................................................................24
1.8 Intel®850E Chipset ....................................................................................................25
1.8.1 AGP .............................................................................................................26
1.8.2 USB..............................................................................................................26
1.8.3 IDE Support .................................................................................................28
1.8.4 Real-Time Clock, CMOS SRAM, and Battery...............................................29
1.8.5 4 Mbit FWH ..................................................................................................29
1.9 I/O Controller ..............................................................................................................30
1.9.1 Serial Port ....................................................................................................30
1.9.2 Parallel Port..................................................................................................30
1.9.3 Diskette Drive Controller ..............................................................................31
1.9.4 Keyboard and Mouse Interface ....................................................................31
1.10 Audio Subsystem........................................................................................................32
1.10.1 Audio Connectors.........................................................................................33
1.10.2 Audio Subsystem Software ..........................................................................33
1.11 LAN Subsystem (Optional) .........................................................................................34
1.11.1 Intel®82562ET PLC Device .........................................................................34
1.11.2 RJ-45 LAN Connector with Integrated LEDs ................................................34
1.11.3 LAN Subsystem Software ............................................................................35
1.12 CNR (Optional) ...........................................................................................................35
1.13 Hardware Management Subsystem............................................................................36
1.13.1 Hardware Monitoring ASICs.........................................................................36
1.13.2 Fan Control and Monitoring..........................................................................38
1.14 Power Management ...................................................................................................39
1.14.1 ACPI.............................................................................................................39
1.14.2 Hardware Support ........................................................................................41

Intel Desktop Board D850EMD2/D850EMV2 Technical Product Specification
vi
2Technical Reference
2.1 Introduction.................................................................................................................47
2.2 Memory Map ..............................................................................................................47
2.3 Fixed I/O Map.............................................................................................................48
2.4 DMA Channels ...........................................................................................................49
2.5 PCI Configuration Space Map ....................................................................................49
2.6 Interrupts ....................................................................................................................50
2.7 PCI Interrupt Routing Map..........................................................................................51
2.8 Connectors .................................................................................................................53
2.8.1 Back Panel Connectors................................................................................54
2.8.2 Internal I/O Connectors ................................................................................57
2.8.3 External I/O Connectors ...............................................................................70
2.9 Jumper Blocks............................................................................................................74
2.9.1 Front Panel Audio Connector/Jumper Block.................................................74
2.9.2 BIOS Setup Configuration Jumper Block......................................................75
2.10 Mechanical Considerations.........................................................................................76
2.10.1 Desktop Board D850EMD2 Form Factor......................................................76
2.10.2 Desktop Board D850EMV2 Form Factor ......................................................77
2.10.3 I/O Shield .....................................................................................................78
2.11 Electrical Considerations ............................................................................................79
2.11.1 Power Consumption.....................................................................................79
2.11.2 Add-in Board Considerations........................................................................79
2.11.3 Standby Current Requirements....................................................................80
2.11.4 Fan Connector Current Capability ................................................................81
2.11.5 Power Supply Considerations ......................................................................81
2.12 Thermal Considerations..............................................................................................82
2.13 Reliability ....................................................................................................................83
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
3Overview of BIOS Features
3.1 Introduction.................................................................................................................87
3.2 BIOS Flash Memory Organization ..............................................................................87
3.3 Resource Configuration..............................................................................................87
3.3.1 PCI Autoconfiguration ..................................................................................87
3.3.2 PCI IDE Support...........................................................................................88
3.4 SMBIOS .....................................................................................................................88
3.5 Legacy USB Support ..................................................................................................89
3.6 BIOS Updates ............................................................................................................89
3.6.1 Language Support........................................................................................90
3.6.2 Custom Splash Screen.................................................................................90

Contents
vii
3.7 Recovering BIOS Data ...............................................................................................91
3.8 Boot Options...............................................................................................................91
3.8.1 CD-ROM Boot..............................................................................................91
3.8.2 Network Boot................................................................................................92
3.8.3 Booting Without Attached Devices ...............................................................92
3.8.4 Changing the Default Boot Device During POST..........................................92
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
3.9.3 Operating System ........................................................................................93
3.10 BIOS Security Features..............................................................................................93
4BIOS 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.......................................................................104
4.4.5 Diskette Configuration Submenu................................................................107
4.4.6 Event Log Configuration Submenu.............................................................108
4.4.7 Video Configuration Submenu....................................................................109
4.5 Security Menu ..........................................................................................................110
4.6 Power Menu .............................................................................................................111
4.6.1 APM Submenu ...........................................................................................112
4.6.2 ACPI Submenu ..........................................................................................112
4.7 Boot Menu................................................................................................................113
4.7.1 Boot Device Priority Submenu....................................................................114
4.7.2 Hard Disk Drives Submenu ........................................................................115
4.7.3 Removable Devices Submenu ...................................................................115
4.7.4 ATAPI CD-ROM Drives Submenu..............................................................116
4.8 Exit Menu .................................................................................................................116
5Error Messages and Beep Codes
5.1 BIOS Error Messages...............................................................................................117
5.2 Port 80h POST Codes..............................................................................................119
5.3 Bus Initialization Checkpoints ...................................................................................123
5.4 Speaker....................................................................................................................124
5.5 BIOS Beep Codes ....................................................................................................124

Intel Desktop Board D850EMD2/D850EMV2 Technical Product Specification
viii
Figures
1. Desktop Board D850EMD2 Components ...................................................................14
2. Desktop Board D850EMV2 Components....................................................................15
3. Standard Block Diagram.............................................................................................16
4. Block Diagram with Optional USB 2.0 Support ...........................................................17
5. Intel 850E Chipset Block Diagram ..............................................................................25
6. USB 1.1 Port Configuration (Optional)........................................................................27
7. USB 2.0 Port Configuration (Optional)........................................................................28
8. Audio Subsystem Block Diagram................................................................................32
9. ICH2 and CNR Signal Interface..................................................................................35
10. Thermal Monitoring.....................................................................................................38
11. Location of the Standby Power Indicator LED ............................................................45
12. Back Panel Connectors ..............................................................................................54
13. Audio Connectors .......................................................................................................58
14. Power and Hardware Control Connectors ..................................................................60
15. Add-in Board and Peripheral Interface Connectors (Desktop Board D850EMD2).......63
16. Add-in Board and Peripheral Interface Connectors (Desktop Board D850EMV2).......64
17. External I/O Connectors .............................................................................................70
18. Location of the Jumper Blocks....................................................................................74
19. Desktop Board D850EMD2 Dimensions .....................................................................76
20. Desktop Board D850EMV2 Dimensions .....................................................................77
21. I/O Shield Dimensions ................................................................................................78
22. Localized High-Temperature Zones............................................................................82
Tables
1. Summary of Board Differences...................................................................................11
2. Feature Summary.......................................................................................................12
3. Manufacturing Options ...............................................................................................13
4. Specifications .............................................................................................................19
5. Supported Processors ................................................................................................22
6. Supported Memory Configurations .............................................................................24
7. Memory Support Matrix ..............................................................................................24
8. Supported IDE Modes ................................................................................................28
9. LAN Connector LED States ........................................................................................34
10. Effects of Pressing the Power Switch .........................................................................39
11. Power States and Targeted System Power ................................................................40
12. Wake-up Devices and Events.....................................................................................41
13. Fan Connector Descriptions for Boards that use the Hardware Monitoring ASIC .......43
14. Fan Connector Descriptions for Boards that use the Hardware Monitoring and Fan
Control ASIC ..............................................................................................................43
15. System Memory Map..................................................................................................47
16. Fixed I/O Map.............................................................................................................48
17. DMA Channels ...........................................................................................................49
18. PCI Configuration Space Map ....................................................................................49
19. Interrupts ....................................................................................................................50
20. PCI Interrupt Routing Map..........................................................................................52

Contents
ix
21. PS/2 Mouse/Keyboard Connectors.............................................................................55
22. USB Connectors.........................................................................................................55
23. Parallel Port Connector...............................................................................................55
24. Serial Port Connectors ...............................................................................................56
25. LAN Connector (Optional) ..........................................................................................56
26. Audio Line In Connector .............................................................................................56
27. Audio Line Out Connector ..........................................................................................56
28. Mic In Connector ........................................................................................................56
29. Auxiliary Line In Connector.........................................................................................59
30. ATAPI CD-ROM Connector ........................................................................................59
31. Fan 3 Connector (Desktop Board D850EMV2 Only)...................................................61
32. Chassis Intrusion Connector.......................................................................................61
33. ATX12V Power Connector..........................................................................................61
34. Processor Fan Connector...........................................................................................61
35. Fan 1 Connector.........................................................................................................62
36. Main Power Connector ...............................................................................................62
37. Fan 2 Connector.........................................................................................................62
38. CNR Connector (Optional)..........................................................................................65
39. PCI Bus Connectors ...................................................................................................66
40. AGP Connector ..........................................................................................................67
41. Diskette Drive Connector............................................................................................68
42. IDE Connectors ..........................................................................................................69
43. SCSI Hard Drive Activity LED Connector....................................................................69
44. Front Panel Audio Connector .....................................................................................71
45. Front Panel USB Connector .......................................................................................71
46. Auxiliary Front Panel Power/Sleep/Message-Waiting LED Connector ........................71
47. Front Panel Connector ...............................................................................................72
48. States for a One-Color Power LED.............................................................................72
49. States for a Two-Color Power LED.............................................................................73
50. Front Panel Audio Connector/Jumper Block ...............................................................75
51. BIOS Setup Configuration Jumper Settings................................................................75
52. Power Usage..............................................................................................................79
53. Standby Current Requirements ..................................................................................80
54. Thermal Considerations for Components ...................................................................83
55. Desktop Boards D850EMD2/D850EMV2 Environmental Specifications .....................84
56. Safety Regulations .....................................................................................................85
57. EMC Regulations........................................................................................................85
58. Component Side Markings .........................................................................................86
59. Solder Side Markings .................................................................................................86
60. Boot Device Menu Options.........................................................................................92
61. Supervisor and User Password Functions ..................................................................94
62. BIOS Setup Program Menu Bar .................................................................................95
63. BIOS Setup Program Function Keys ..........................................................................96
64. Maintenance Menu .....................................................................................................96
65. Extended Configuration Submenu ..............................................................................97
66. Main Menu..................................................................................................................98
67. Advanced Menu..........................................................................................................99
68. PCI Configuration Submenu .....................................................................................100

Intel Desktop Board D850EMD2/D850EMV2 Technical Product Specification
x
69. Boot Configuration Submenu....................................................................................101
70. Peripheral Configuration Submenu...........................................................................102
71. IDE Configuration Submenu .....................................................................................104
72. Primary/Secondary IDE Master/Slave Submenus.....................................................105
73. Diskette Configuration Submenu ..............................................................................107
74. Event Log Configuration Submenu ...........................................................................108
75. Video Configuration Submenu..................................................................................109
76. Security Menu ..........................................................................................................110
77. Power Menu .............................................................................................................111
78. APM Submenu .........................................................................................................112
79. ACPI Submenu.........................................................................................................112
80. Boot Menu................................................................................................................113
81. Boot Device Priority Submenu..................................................................................114
82. Hard Disk Drives Submenu ......................................................................................115
83. Removable Devices Submenu..................................................................................115
84. ATAPI CD-ROM Drives Submenu ............................................................................116
85. Exit Menu .................................................................................................................116
86. BIOS Error Messages...............................................................................................117
87. Uncompressed INIT Code Checkpoints....................................................................119
88. Boot Block Recovery Code Checkpoints ..................................................................119
89. Run-Time Code Uncompressed in F000 Shadow RAM ............................................120
90. Bus Initialization Checkpoints ...................................................................................123
91. Upper Nibble High Byte Functions............................................................................123
92. Lower Nibble High Byte Functions............................................................................124
93. Beep Codes..............................................................................................................125

11
1 Product Description
What This Chapter Contains
1.1 Board Differences.......................................................................................................11
1.2 Overview ....................................................................................................................12
1.3 Online Support ...........................................................................................................18
1.4 Operating System Support .........................................................................................18
1.5 Design Specifications .................................................................................................19
1.6 Processor ...................................................................................................................22
1.7 System Memory .........................................................................................................23
1.8 Intel®850E Chipset ....................................................................................................25
1.9 I/O Controller ..............................................................................................................30
1.10 Audio Subsystem........................................................................................................32
1.11 LAN Subsystem (Optional) .........................................................................................34
1.12 CNR (Optional) ...........................................................................................................35
1.13 Hardware Management Subsystem............................................................................36
1.14 Power Management ...................................................................................................39
1.1 Board Differences
This TPS describes these Intel®desktop boards: D850EMD2 and D850EMV2. The boards are
identical except for the differences listed in Table 1 below.
Table 1. Summary of Board Differences
Desktop Board
D850EMD2
• microATX form factor (9.60 inches by 9.60 inches)
• Three PCI bus connectors
• Three fan connectors
Desktop Board
D850EMV2
• ATX form factor (12.00 inches by 9.60 inches)
• Five PCI bus connectors
• Four fan connectors
✏ NOTE
All illustrations show the desktop board D850EMD2 unless there are significant differences
between the two boards. Any significant differences are indicated in each figure.

Intel Desktop Board D850EMD2/D850EMV2 Technical Product Specification
12
1.2 Overview
1.2.1 Feature Summary
Table 2 summarizes the desktop boards D850EMD2/D850EMV2’s major features.
Table 2. Feature Summary
Form Factor Desktop Board D850EMD2: microATX (9.60 inches by 9.60 inches)
Desktop Board D850EMV2: ATX (12.00 inches by 9.60 inches)
Processor • Support for an Intel®Pentium®4 processor in a µPGA478 socket
• 400/533 MHz system data bus
Memory • Two Direct-RDRAM channels with two RIMM†s per channel (four RIMM sockets)
• Support for up to 2 GB of system memory
Chipset Intel®850E Chipset, consisting of:
• Intel®82850E Memory Controller Hub (MCH)
• Intel®82801BA I/O Controller Hub (ICH2)
• 4 Mbit Firmware Hub (FWH)
I/O Control SMSC LPC47M142 LPC bus I/O controller
Video AGP connector supporting 1.5 V 4X AGP cards only
Peripheral
Interfaces
• Up to seven Universal Serial Bus (USB) ports
• Two serial ports
• One parallel port
• Two IDE interfaces with Ultra DMA 33 and ATA-66/100 support
• One diskette drive interface
• PS/2†keyboard and mouse ports
Expansion
Capabilities
• Desktop Board D850EMD2: Three PCI bus add-in card connectors (SMBus
routed to PCI bus connector 2)
• Desktop Board D850EMV2: Five PCI bus add-in card connectors (SMBus
routed to PCI bus connector 2)
BIOS • Intel/AMI BIOS (resident in the 4 Mbit FWH)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and System Management BIOS (SMBIOS)
Instantly Available
PC
• Support for PCI Local Bus Specification Revision 2.2
• Suspend to RAM support
• Wake on PCI, CNR, RS-232, front panel, PS/2 keyboard, and USB ports
LAN Wake
Capabilities
Support for system wake-up using an add-in network interface card with remote
wake-up capability via the PME# signal
continued

Product Description
13
Table 2. Feature Summary (continued)
Hardware
Management
Subsystem
One of the following:
• Hardware monitoring ASIC
 Voltage sense to detect out-of-range power supply voltages
 Thermal sense to detect out-of-range thermal values
 Fan monitoring
• Hardware monitoring and fan control ASIC
 Voltage sense to detect out-of-range power supply voltages
 Thermal sense to detect out-of-range thermal values
 Fan monitoring and control
Audio (Integrated) Audio subsystem that uses the Analog Devices AD1885 analog codec for AC ’97
processing
For information about Refer to
The board’s compliance level with ACPI, Plug and Play, and SMBIOS. Section 1.5, page 19
1.2.2 Manufacturing Options
Table 3 describes the manufacturing options. Not every manufacturing option is available in all
marketing channels. Please contact your Intel representative to determine which manufacturing
options are available to you.
Table 3. Manufacturing Options
LAN Intel®82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device
CNR One Communication and Networking Riser (CNR) connector (slot shared with
PCI bus connector 3 on the desktop board D850EMD2 and with PCI bus connector
6 on the desktop board D850EMV2)
USB 2.0 Support for USB 2.0 devices. The USB 2.0 option supports up to five USB ports.
It uses the following components:
• NEC µPD720100 USB 2.0 host controller
• SMSC LPC47M132 LPC bus I/O controller
The USB 1.1 ports routed through the ICH2 are not available with the USB 2.0
option.
✏ NOTE
The LAN and the CNR manufacturing options are mutually exclusive.

Intel Desktop Board D850EMD2/D850EMV2 Technical Product Specification
14
1.2.3 Board Layouts
Figure 1 shows the location of the major components on the desktop board D850EMD2.
OM14440
D
C
G
H
F
E
M
KO L
A
U
V
R
Q
P
I
J
S
N
B
T
A AD1885 audio codec L Diskette drive connector
B Intel 82562ET PLC device (optional) M IDE connectors
C AGP connector N LPC bus I/O controller
D Back panel connectors O Front panel connector
E +12 V power connector (ATX12V) P Battery
F Intel 82850E MCH Q Speaker
G µPGA478 processor socket R 4 Mbit FWH
H Hardware monitor S Intel 82801BA ICH2
I RAMBUS†Bank 0 (RIMM1 and RIMM2) T NEC µPD720100 USB 2.0 host controller (optional)
J RAMBUS Bank 1 (RIMM3 and RIMM4) U PCI bus add-in card connectors
K Power connector V CNR connector (optional)
Figure 1. Desktop Board D850EMD2 Components

Product Description
15
Figure 2 shows the location of the major components on the desktop board D850EMV2.
OM14441
D
C
G
H
F
E
M
KO L
A
V
R
Q
P
I
J
S
N
B
T
U
A AD1885 audio codec L Diskette drive connector
B Intel 82562ET PLC device (optional) M IDE connectors
C AGP connector N LPC bus I/O controller
D Back panel connectors O Front panel connector
E +12 V power connector (ATX12V) P Battery
F Intel 82850E MCH Q Speaker
G µPGA478 processor socket R 4 Mbit FWH
H Hardware monitor S Intel 82801BA ICH2
I RAMBUS Bank 0 (RIMM1 and RIMM2) T NEC µPD720100 USB 2.0 host controller (optional)
J RAMBUS Bank 1 (RIMM3 and RIMM4) U PCI bus add-in card connectors
K Power connector V CNR connector (optional)
Figure 2. Desktop Board D850EMV2 Components

Intel Desktop Board D850EMD2/D850EMV2 Technical Product Specification
16
1.2.4 Block Diagram
Figure 3 is a block diagram of the major functional areas of the standard desktop boards
D850EMD2/D850EMV2. See Figure 6 on page 27 for USB port routing.
82801BA
I/O Controller Hub
(ICH2)
82850E Memory
Controller Hub
(MCH)
4 Mbit
Firmware Hub
(FWH)
AHA
Bus
System Bus
(400/533 MHz)
µPGA478
Processor Socket
Primary/
Secondary IDE ATA-66/100
LPC
Bus
AGP
Interface
Dual RAMBUS
Channels
850E Chipset
= connector or socket
RAMBUS Bank 0
(RIMM1 and RIMM2)
RAMBUS Bank 1
(RIMM3 and RIMM4)
OM14437
D850EMV2
Only
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
PCI Slot 5
Hardware
Monitor SMBus
PCI
Diskette Drive
Connector
I/O
Controller
PS/2 Keyboard
PS/2 Mouse
Parallel Port
Serial Ports
Back Panel
USB Ports (2)
Front Panel
USB Ports (2)
USB
USB
CSMA/CD
Unit
Interface
AD1885
Audio Codec
Auxiliary Line In
Mic In
Line Out
CD-ROM
Line In
CNR
Connector
(optional)
LAN
Connector
(optional)
Physical
Layer
Interface
AC Link
Back Panel
USB Ports (2)
USB
4X AGP
Connector
(1.5 V only)
Figure 3. Standard Block Diagram

Product Description
17
Figure 4 is a block diagram of the major functional areas of desktop boards D850EMD2 and
D850EMV2 with the USB 2.0 manufacturing option. See Figure 7 on page 28 for USB port
routing.
82801BA
I/O Controller Hub
(ICH2)
82850E Memory
Controller Hub
(MCH)
4 Mbit
Firmware Hub
(FWH)
AHA
Bus
System Bus
(400/533 MHz)
µPGA478
Processor Socket
Primary/
Secondary IDE ATA-66/100
LPC
Bus
AGP
Interface
Dual RAMBUS
Channels
850E Chipset
= connector or socket
4X AGP
Connector
(1.5 V only)
RAMBUS Bank 0
(RIMM1 and RIMM2)
RAMBUS Bank 1
(RIMM3 and RIMM4)
OM14438
D850EMV2
Only
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
PCI Slot 5
Hardware
Monitor SMBus
PCI
USB
Diskette Drive
Connector
I/O
Controller
PS/2 Keyboard
PS/2 Mouse
Parallel Port
Serial Ports
NEC µPD720100
USB 2.0
Host Controller
(optional)
USB Back Panel
USB Ports (2)
Front Panel
USB Ports (2)
CSMA/CD
Unit
Interface
AD1885
Audio Codec
Auxiliary Line In
Mic In
Line Out
CD-ROM
Line In
CNR
Connector
(optional)
LAN
Connector
(optional)
Physical
Layer
Interface
AC Link
Figure 4. Block Diagram with Optional USB 2.0 Support

Intel Desktop Board D850EMD2/D850EMV2 Technical Product Specification
18
1.3 Online Support
To find information about… Visit this World Wide Web site:
Intel’s desktop boards 850EMD2/D850EMV2 http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop
Processor data sheets http://www.intel.com/design/litcentr
ICH2 addressing http://developer.intel.com/design/chipsets/datashts
Custom splash screens http://intel.com/design/motherbd/gen_indx.htm
Audio software and utilities http://www.intel.com/design/motherbd
LAN software and drivers http://www.intel.com/design/motherbd
1.4 Operating System Support
The desktop boards D850EMD2/D850EMV2 support drivers for all of the onboard hardware and
subsystems under the following operating systems:
• Windows†98 SE
• Windows Me
• Windows NT†4.0
• Windows 2000
• Windows XP
For information about Refer to
Supported drivers Section 1.3, page 18
✏ NOTE
Other drivers may be offered by other third-party vendors.
✏ NOTE
USB 2.0 support has been tested with Windows 2000 and Windows XP drivers and is not currently
supported by any other operating system.

Product Description
19
1.5 Design Specifications
Table 4 lists the specifications applicable to the desktop boards D850EMD2/D850EMV2.
Table 4. Specifications
Reference
Name
Specification
Title
Version, Revision Date,
and Ownership
The information is
available from…
AC ’97 Audio Codec ’97 Revision 2.2,
September 2000,
Intel Corporation.
ftp://download.intel.com/ial/
scalableplatforms/
ac97r22.pdf
ACPI Advanced
Configuration and
Power Interface
Specification
Version 2.0,
July 27, 2000,
Compaq Computer Corp.,
Intel Corporation,
Microsoft Corporation,
and Toshiba Corporation.
http://www.teleport.com/
~acpi/
AGP Accelerated Graphics
Port Interface
Specification
Version 2.0,
May 4, 1998,
Intel Corporation.
http://www.agpforum.org/
AMI BIOS AMIBIOS Desktop
Core 8.0
AMIBIOS 8.0,
2001,
American Megatrends, Inc.
http://www.ami.com/support/
doc/amibios8.pdf
ATA/
ATAPI-5
Information
Technology - AT
Attachment with
Packet Interface - 5,
(ATA/ATAPI-5)
Revision 3,
February 29, 2000,
Contact: T13 Chair,
Seagate Technology.
http://www.t13.org
ATX ATX Specification Version 2.03,
December 1998,
Intel Corporation.
http://www.formfactors.org/
developer/specs/atx/
atxspecs.htm
ATX12V ATX / ATX12V Power
Supply Design Guide
Version 1.2,
August 2000,
Intel Corporation.
http://www.formfactors.org
/developer/specs/atx/
atxspecs.htm
BIS Boot Integrity
Services (BIS)
Application
Programming
Interface (API)
Version 1.0,
August 4, 1999,
Intel Corporation.
http://www.intel.com/labs/
manage/wfm/wfmspecs.htm
CNR Communication and
Network Riser (CNR)
Specification
Revision 1.2,
November 8, 2001,
Intel Corporation.
http://developer.intel.com/
technology/cnr/index.htm
EHCI Enhanced Host
Controller Interface
Specification for
Universal Serial Bus
Revision 1.0,
March 12, 2002,
Intel Corporation.
http://developer.intel.com/
technology/usb/download/
ehci-r10.pdf
continued

Intel Desktop Board D850EMD2/D850EMV2 Technical Product Specification
20
Table 4. Specifications (continued)
Reference
Name
Specification
Title
Version, Revision Date and
Ownership
The information is available
from…
EPP IEEE std 1284.1-1997
Enhanced Parallel Port
Version 1.7,
1997,
Institute of Electrical and
Electronic Engineers.
http://standards.ieee.org/
reading/ieee/std_public/
description/busarch/
1284.1-1997_desc.html
El Torito Bootable CD-ROM
format specification
Version 1.0,
January 25, 1995,
Phoenix Technologies Ltd. and
IBM Corporation.
http://www.ptltd.com/
techs/specs.html
LPC Low Pin Count
Interface Specification
Version 1.0,
September 29, 1997,
Intel Corporation.
http://www.intel.com/
design/chipsets/industry/
lpc.htm
OHCI OpenHCI – Open Host
Controller Interface
Specification for USB
Release 1.0a,
September 14, 1999,
Compaq Computer Corp.,
Microsoft Corporation, and
National Semiconductor Corp.
http://www.usb.org/
developers/docs.html
PCI PCI Local Bus
Specification
Version 2.2,
December 18, 1998,
PCI Special Interest Group.
http://www.pcisig.com/
PCI Bus Power
Management Interface
Specification
Version 1.1,
December 18, 1998,
PCI Special Interest Group.
http://www.pcisig.com/
Plug and
Play
Plug and Play BIOS
Specification
Version 1.0a,
May 5, 1994,
Compaq Computer Corp.,
Phoenix Technologies Ltd.,
and Intel Corporation.
http://www.microsoft.com/
hwdev/respec/pnpspecs.htm
PXE Preboot Execution
Environment
Version 2.1,
September 1999,
Intel Corporation.
http://developer.intel.com/
ial/wfm/wfmspecs.htm
Rambus Serial
Presence Detect
(SPD) Specification
Version 1.0,
March 1999,
Rambus Corporation.
http://www.rambus.com/
developer/
support_rimm.html
RIMM
Rambus RIMM
Specification
Version 1.0,
February 1999,
Rambus Corporation.
http://www.rambus.com/
developer/
development_support.html
continued