Intel D845PEMY User manual

August 2004
Order Number: C83645-001
The Intel®Desktop Board D845PEMY 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 D845PEMY Specification Update.
Intel®Desktop Board
D845PEMY
Technical Product Specification

Revision History
Revision Revision History Date
-001 First release of the Intel®Desktop Board D845PEMY Technical Product
Specification. August 2004
This product specification applies to only standard Intel®Desktop Board D845PEMY with BIOS
identifier FN84510A.86A.
Changes to this specification will be published in the Intel Desktop Board D845PEMY
Specification Update before being incorporated into a revision of this document.
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The Intel®Desktop Board D845PEMY may contain design defects or errors known as errata that may cause the product to
deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.
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Copyright ©2004, 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 the Intel®Desktop Board D845PEMY. It
describes the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Board
D845PEMY 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 Board D845PEMY
2 A map of the resources of the Desktop Board
3 The features supported by the BIOS Setup program
4 A description of the BIOS error messages, beep codes, and POST codes
Typographical Conventions
This section contains information about the conventions used in this specification. Not all of these
symbols and abbreviations appear in all specifications of this type.
Notes, Cautions, and Warnings

NOTE
Notes call attention to important information.
#
INTEGRATOR’S NOTES
Integrator’s notes are used to call attention to information that may be useful to system integrators.
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.
WARNING
Warnings indicate conditions, which if not observed, can cause personal injury.

Intel Desktop Board D845PEMY Technical Product Specification
iv
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 the Desktop Board D845PEMY, 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.

v
Contents
1Product Description
1.1 Overview......................................................................................................................10
1.1.1 Feature Summary..........................................................................................10
1.1.2 Manufacturing Options ..................................................................................11
1.1.3 Board Layout.................................................................................................12
1.2 Block Diagram..............................................................................................................13
1.3 Online Support.............................................................................................................14
1.4 Operating System Support...........................................................................................14
1.5 Processor.....................................................................................................................15
1.6 System Memory...........................................................................................................16
1.7 Intel®845PE Chipset ...................................................................................................18
1.7.1 AGP...............................................................................................................18
1.7.2 USB...............................................................................................................19
1.7.3 IDE Interfaces................................................................................................19
1.7.4 Real-Time Clock, CMOS SRAM, and Battery................................................20
1.8 I/O Controller................................................................................................................21
1.8.1 Serial Ports....................................................................................................21
1.8.2 Parallel Port...................................................................................................21
1.8.3 Diskette Drive Controller................................................................................21
1.8.4 Keyboard and Mouse Interface .....................................................................21
1.9 Audio Subsystem.........................................................................................................22
1.9.1 Front Panel Audio Connectors ......................................................................22
1.9.2 Audio Subsystem Software ...........................................................................22
1.10 LAN Subsystem ...........................................................................................................23
1.10.1 Intel®82562ET Platform LAN Connect Device..............................................23
1.10.2 RJ-45 LAN Connector with Integrated LEDs.................................................23
1.10.3 LAN Subsystem Software..............................................................................23
1.11 Hardware Management Subsystem (Optional)............................................................24
1.11.1 Hardware Monitoring and Fan Control ASIC.................................................24
1.11.2 Fan Monitoring...............................................................................................24
1.11.3 Chassis Intrusion and Detection....................................................................24
1.12 Power Management.....................................................................................................25
1.12.1 ACPI..............................................................................................................25
1.12.2 Hardware Support .........................................................................................27
2Technical Reference
2.1 Introduction ..................................................................................................................31
2.2 Memory Map................................................................................................................31
2.3 Fixed I/O Map...............................................................................................................32
2.4 DMA Channels.............................................................................................................33
2.5 PCI Configuration Space Map......................................................................................33
2.6 Interrupts......................................................................................................................34
2.7 PCI Interrupt Routing Map ...........................................................................................35

Intel Desktop Board D845PEMY Technical Product Specification
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2.8 Connectors...................................................................................................................37
2.8.1 Back Panel Connectors.................................................................................38
2.8.2 Internal I/O Connectors .................................................................................39
2.8.3 External I/O Connectors................................................................................44
2.9 Jumper Blocks..............................................................................................................48
2.9.1 Front Panel Audio Connector/Jumper Block .................................................48
2.9.2 BIOS Setup Configuration Jumper Block ......................................................49
2.10 Mechanical Considerations..........................................................................................50
2.10.1 I/O Shield.......................................................................................................51
2.11 Electrical Considerations..............................................................................................52
2.11.1 DC Loading....................................................................................................52
2.11.2 Add-in Board Considerations.........................................................................52
2.11.3 Fan Connector Current Capability.................................................................52
2.11.4 Power Supply Considerations .......................................................................53
2.12 Thermal Considerations...............................................................................................53
2.13 Reliability......................................................................................................................55
2.14 Environmental..............................................................................................................55
2.15 Regulatory Compliance................................................................................................56
2.15.1 Safety Regulations ........................................................................................56
2.15.2 EMC Regulations...........................................................................................56
2.15.3 European Union Declaration of Conformity Statement..................................57
2.15.4 Product Ecology Statements.........................................................................58
2.15.5 Product Certification Markings (Board Level)................................................58
3Overview of BIOS Features
3.1 Introduction ..................................................................................................................59
3.2 BIOS Flash Memory Organization ...............................................................................60
3.3 Resource Configuration ...............................................................................................60
3.3.1 PCI Autoconfiguration....................................................................................60
3.3.2 PCI IDE Support............................................................................................60
3.4 System Management BIOS (SMBIOS) ........................................................................61
3.5 Legacy USB Support....................................................................................................61
3.6 BIOS Updates..............................................................................................................62
3.6.1 Language Support.........................................................................................62
3.6.2 Custom Splash Screen..................................................................................62
3.7 Boot Options ................................................................................................................63
3.7.1 CD-ROM Boot ...............................................................................................63
3.7.2 Network Boot.................................................................................................63
3.7.3 Booting Without Attached Devices................................................................63
3.7.4 Changing the Default Boot Device During POST..........................................63
3.8 Fast Booting Systems with Intel®Rapid BIOS Boot.....................................................64
3.8.1 Peripheral Selection and Configuration.........................................................64
3.8.2 Intel Rapid BIOS Boot ...................................................................................64
3.9 BIOS Security Features ...............................................................................................65

Contents
vii
4Error Messages and Beep Codes
4.1 BIOS Error Messages..................................................................................................67
4.2 Port 80h POST Codes .................................................................................................69
4.3 Bus Initialization Checkpoints ......................................................................................73
4.4 Speaker .......................................................................................................................74
4.5 BIOS Beep Codes........................................................................................................74
Figures
1. Desktop Board D845PEMY Components....................................................................12
2. Block Diagram..............................................................................................................13
3. Location of the Standby Power Indicator LED on the D845PEMY Board....................30
4. Back Panel Connectors................................................................................................38
5. Audio, Power, and Hardware Control Connectors.......................................................40
6. Add-in Board and Peripheral Interface Connectors .....................................................43
7. External I/O Connectors...............................................................................................44
8. Connection Diagram for Front Panel Connector..........................................................45
9. Connection Diagram for Front Panel USB Connector..................................................47
10. Location of the Jumper Blocks.....................................................................................48
11. Desktop Board Dimensions..........................................................................................50
12. I/O Shield Dimensions..................................................................................................51
13. Localized High Temperature Zones.............................................................................54
Tables
1. Feature Summary ........................................................................................................10
2. Manufacturing Options.................................................................................................11
3. Supported System Bus Frequency and Memory Speed Combinations.......................16
4. Supported DDR DIMM Configurations.........................................................................17
5. LAN Connector LED States .........................................................................................23
6. Effects of Pressing the Power Switch ..........................................................................25
7. Power States and Targeted System Power.................................................................26
8. Wake-up Devices and Events......................................................................................27
9. Fan Connector Function/Operation..............................................................................28
10. System Memory Map ...................................................................................................31
11. I/O Map ........................................................................................................................32
12. DMA Channels.............................................................................................................33
13. PCI Configuration Space Map......................................................................................33
14. Interrupts......................................................................................................................34
15. PCI Interrupt Routing Map ...........................................................................................36
16. Front Panel Audio Connector.......................................................................................41
17. ATX12V Power Connector...........................................................................................41
18. Rear Chassis Fan Connector.......................................................................................41
19. Processor Fan Connector............................................................................................41
20. Main Power Connector.................................................................................................42
21. Front Chassis Fan Connector......................................................................................42
22. Chassis Intrusion Connector........................................................................................42
23. Serial Port B Connector (optional) ...............................................................................44
24. Auxiliary Front Panel Power/Sleep LED Connector.....................................................45
25. Front Panel Connector.................................................................................................45

Intel Desktop Board D845PEMY Technical Product Specification
viii
26. States for a One-Color Power LED..............................................................................46
27. States for a Two-Color Power LED..............................................................................46
28. Front Panel Audio Connector/Jumper Block................................................................49
29. BIOS Setup Configuration Jumper Settings.................................................................49
30. DC Loading Characteristics .........................................................................................52
31. Fan Connector Current Capability................................................................................52
32. Thermal Considerations for Components ....................................................................54
33. Desktop Board D845PEMY Environmental Specifications ..........................................55
34. Safety Regulations.......................................................................................................56
35. EMC Regulations.........................................................................................................56
36. Product Certification Markings.....................................................................................58
37. BIOS Setup Program Menu Bar...................................................................................60
38. BIOS Setup Program Function Keys............................................................................60
39. Boot Device Menu Options ..........................................................................................63
40. Supervisor and User Password Functions...................................................................65
41. BIOS Error Messages..................................................................................................67
42. Uncompressed INIT Code Checkpoints.......................................................................69
43. Boot Block Recovery Code Checkpoints .....................................................................69
44. Runtime Code Uncompressed in F000 Shadow RAM.................................................70
45. Bus Initialization Checkpoints ......................................................................................73
46. Upper Nibble High Byte Functions...............................................................................73
47. Lower Nibble High Byte Functions...............................................................................74
48. Beep Codes .................................................................................................................75

9
1 Product Description
What This Chapter Contains
1.1 Overview......................................................................................................................10
1.2 Block Diagram..............................................................................................................13
1.3 Online Support.............................................................................................................14
1.4 Operating System Support...........................................................................................14
1.5 Processor.....................................................................................................................15
1.6 System Memory...........................................................................................................16
1.7 Intel®845PE Chipset ...................................................................................................18
1.8 I/O Controller................................................................................................................21
1.9 Audio Subsystem.........................................................................................................22
1.10 LAN Subsystem ...........................................................................................................23
1.11 Hardware Management Subsystem (Optional)............................................................24
1.12 Power Management.....................................................................................................25

Intel Desktop Board D845PEMY Technical Product Specification
10
1.1 Overview
1.1.1 Feature Summary
Table 1 summarizes the major features of the Intel®Desktop Board D845PEMY.
Table 1. Feature Summary
Form Factor microATX (9.20 inches by 8.20 inches [233.68 millimeters by 208.28 millimeters])
Processor • Support for an Intel®Pentium®4 processor in an mPGA478 socket with a
400/533 MHz system bus
• Support for an Intel®Celeron®processor in an mPGA478 socket with a
400 MHz system bus
• Support for an Intel®Celeron®D processor in an mPGA478 socket with a
400 MHz system bus
Memory • Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for single-sided or double-sided DIMMs (DDR333/266/200)
• Support for up to 2 GB of single-channel DDR memory
Chipset Intel®845PE Chipset, consisting of:
• Intel®82845PE Memory Controller Hub (MCH)
• Intel®82801DB I/O Controller Hub (ICH4)
• 3 Mbit Firmware Hub (FWH)
Video AGP connector supporting 1.5 V 4X AGP cards
Audio Audio subsystem for AC ‘97 processing using the Realtek ALC202A codec
I/O Control National Semiconductor PC87372 LPC Bus I/O controller (or equivalent)
LAN Intel®82562ET 10/100 Mbit/sec Platform LAN Connect (PLC) device
USB Support for USB 2.0 devices
Peripheral
Interfaces
• Up to four USB ports
• One serial port
• One parallel port
• Two IDE interfaces with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2* keyboard and mouse ports
• Three fan connectors
Expansion
Capabilities Three PCI bus add-in card connectors (SMBus routed to PCI bus connector 2)
BIOS • Intel/AMI BIOS (resident in the 3 Mbit FWH)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
Instantly Available
PC Technology
• Support for PCI Local Bus Specification Revision 2.2
• Suspend to RAM support
• Wake on PCI, RS-232, front panel, PS/2 devices, and USB ports