Intel S845WD1-E - Server Board Motherboard User manual

Intel® Server Board S845WD1-E
(S845WD1H) Product Guide
A Guide for echnically Qualified Assemblers of Intel® Identified
Subassemblies/Products
Order Number: C22229-001

ii
Disclaimer
Intel Corporation (Intel) makes no warranty o any kind with regard to this material, including, but not limited to, the implied
warranties o merchantability and itness or a particular purpose. Intel assumes no responsibility or any errors that may
appear in this document. Intel makes no commitment to update nor to keep current the in ormation contained in this
document. No part o this document may be copied or reproduced in any orm or by any means without prior written
consent o Intel.
An Intel® product, when used in accordance with its associated documentation, is "Year 2000 Capable" when, upon
installation, it accurately stores, displays, processes, provides, and/or receives date data rom, into, and between the
twentieth and twenty- irst centuries, including leap year calculations, provided that all other technology used in combination
with said product properly exchanges date data with it.
Intel, Pentium, LANDesk and Celeron are the trademarks or registered trademarks o Intel Corporation or its subsidiaries in
the United States and other countries.
† Other names and brands may be claimed as the property o others.
Copyright © 2002 Intel Corporation.

iii
Contents
1Description...................................................................................................... 9
Server Board Features......................................................................................................... 9
Back Panel Connectors ............................................................................................. 10
Front Panel Connectors............................................................................................. 11
Server Board Connector and Component Locations.................................................. 12
Processors................................................................................................................. 13
Memory 13
Intel 845E Chipset ..................................................................................................... 14
Intel 82845E Memory Controller Hub (MCH)............................................... 14
Intel 82801BA I/O Controller Hub (ICH2)..................................................... 15
Intel 82802AB Firmware Hub (FWH)........................................................... 15
I/O Controller............................................................................................................. 15
Serial Ports.................................................................................................. 16
Parallel Port................................................................................................. 16
Diskette Drive Controller.............................................................................. 16
Keyboard and Mouse Inter ace ................................................................... 16
Hardware Management Subsystem........................................................................... 16
Hardware Management ASIC...................................................................... 17
Fan Monitoring............................................................................................ 17
Chassis Intrusion and Detection.................................................................. 17
Real-Time Clock, CMOS SRAM, and Battery ............................................................ 17
Legacy USB Support ................................................................................................. 18
IDE Support............................................................................................................... 19
IDE Inter aces ............................................................................................. 19
SCSI Hard Drive Activity LED Connector .................................................... 19
BIOS 20
PCI Auto Con iguration.............................................................................................. 20
PCI IDE Support........................................................................................................ 20
BIOS Updates............................................................................................................ 21
Language Support....................................................................................... 21
Custom Splash Screen................................................................................ 21
Recovering BIOS Data............................................................................................... 22
Boot Options.............................................................................................................. 22
CD-ROM and Network Boot........................................................................ 22
Booting Without Attached Devices .............................................................. 23
Fast Booting Systems with Intel® Rapid BIOS Boot .................................................. 23
Intel Rapid BIOS Boot ................................................................................. 23
BIOS Security Passwords.......................................................................................... 24
System Management BIOS (SMBIOS)...................................................................... 25
Power Management Features.................................................................................... 25
Wake on LAN Technology........................................................................... 26
Wake on Ring.............................................................................................. 26
Resume on Ring.......................................................................................... 26

iv Intel Server Board S845WD1-E (S845WD1H) Product Guide
ACPI .................................................................................................................... 27
System States and Power States................................................................ 28
Wake-up Devices and Events...................................................................... 29
Hardware Support...................................................................................................... 29
Power Connector......................................................................................... 30
Fan Connectors........................................................................................... 30
LAN Wake Capabilities................................................................................ 31
Instantly Available PC Technology.............................................................. 31
Resume on Ring.......................................................................................... 32
Wake rom USB........................................................................................... 32
Wake rom PS/2 Devices............................................................................. 32
PME# Wake-up Support.............................................................................. 32
PCI I/O Subsystem............................................................................................................. 33
32-bit, 33-MHz PCI Subsystem.................................................................................. 33
Device IDs (IDSEL)..................................................................................... 33
PCI Arbitration............................................................................................. 34
ATA-100 34
Video Controller......................................................................................................... 35
Video Modes............................................................................................... 35
Video Memory Inter ace.............................................................................. 36
Network Inter ace Controller (NIC)............................................................................. 36
NIC Connector and Status LEDs................................................................. 36
Hardware Monitoring.......................................................................................................... 36
2Server Board Installation and Upgrading................................................... 37
Tools and Supplies Needed................................................................................................ 37
Be ore You Begin............................................................................................................... 37
Emissions Disclaimer................................................................................................. 37
Warnings and Cautions...................................................................................................... 37
Memory.............................................................................................................................. 38
DIMM Installation Guidelines ..................................................................................... 38
Installing DIMMs........................................................................................................ 39
Removing DIMMs...................................................................................................... 40
Installing the I/O Shield.......................................................................................................41
Installing the Server Board................................................................................................. 42
Installing a Processor......................................................................................................... 43
Removing the Processor.................................................................................................... 45
Replacing the Battery......................................................................................................... 46
Connecting the IDE Cable.................................................................................................. 49
Setting the BIOS Con iguration Jumper.............................................................................. 50
3 Configuration Software and Utilities.......................................................... 51
Updating the BIOS with the Intel® Express BIOS Update Utility......................................... 51
Updating the BIOS with the Intel® Flash Memory Update Utility ........................................ 51
Preparing or the Update............................................................................................ 51
Obtaining the BIOS Update File .................................................................. 52
Recording the Current BIOS Settings.......................................................... 52
Creating Bootable Media............................................................................. 52

Contents v
Creating a Bootable Diskette....................................................................... 53
Creating a BIOS Update Media................................................................... 53
Updating the BIOS ............................................................................................................. 54
Recovering the BIOS.......................................................................................................... 55
Using the Setup Program................................................................................................... 56
BIOS Setup Program Modes ..................................................................................... 56
Maintenance Menu.................................................................................................... 57
Extended Con iguration Submenu............................................................... 58
Main Menu................................................................................................................. 59
Advanced Menu......................................................................................................... 60
PCI Con iguration Submenu........................................................................ 61
Boot Con iguration Submenu....................................................................... 62
Peripheral Con iguration Submenu.............................................................. 63
IDE Con iguration Submenu........................................................................ 65
Diskette Con iguration Submenu................................................................. 67
Event Log Con iguration Submenu.............................................................. 68
Video Con iguration Submenu..................................................................... 69
Security Menu .................................................................................................................... 70
Power Menu....................................................................................................................... 71
ACPI Submenu.......................................................................................................... 71
Boot Menu.......................................................................................................................... 72
Boot Device Priority Submenu................................................................................... 73
Hard Disk Drives Submenu........................................................................................ 74
Removable Devices Submenu................................................................................... 74
ATAPI CDROM Drives Submenu............................................................................... 75
Exit Menu........................................................................................................................... 75
4Solving BIOS Problems................................................................................ 77
BIOS Beep Codes.............................................................................................................. 77
BIOS Error Messages......................................................................................................... 78
5Getting Help .................................................................................................. 81
World Wide Web ................................................................................................................ 81
Telephone .......................................................................................................................... 81
6echnical Reference..................................................................................... 83
Server Board Connectors................................................................................................... 83
Baseboard Connectors.............................................................................................. 84
Power and Hardware Control Connectors................................................... 84
Add-In Board and Peripheral Inter ace Connectors..................................... 85
Server Board Resources.................................................................................................... 86
Memory Map.............................................................................................................. 86
DMA Channels........................................................................................................... 86
I/O Map 87
Interrupts ................................................................................................................... 88
7Regulatory and Integration Information..................................................... 91
Product Regulatory Compliance......................................................................................... 91

vi Intel Server Board S845WD1-E (S845WD1H) Product Guide
Product Sa ety Compliance ....................................................................................... 91
Product EMC Compliance.......................................................................................... 91
Product Regulatory Compliance Markings................................................................. 92
Electromagnetic Compatibility Notices................................................................................ 92
FCC (USA) ................................................................................................................ 92
INDUSTRY CANADA (ICES-003).............................................................................. 93
Europe (CE Declaration o Con ormity)...................................................................... 93
Taiwan Declaration o Con ormity.............................................................................. 93
Korean RRL Compliance........................................................................................... 94
Australia / New Zealand............................................................................................. 94
Installation Precautions ...................................................................................................... 94
Installation Requirements................................................................................................... 95
Prevent Power Supply Overload................................................................................ 95
Place Battery Marking................................................................................................ 95
Use Only or Intended Applications............................................................................ 95
Figures
Figure 1. Back Panel Connectors............................................................................................ 10
Figure 2. Front Panel Connectors ........................................................................................... 11
Figure 3. Server Board Components....................................................................................... 12
Figure 4. Location o the Standby Power Indicator LED.......................................................... 32
Figure 5. DIMM Socket Locations ........................................................................................... 39
Figure 6. I/O Shield Dimensions.............................................................................................. 41
Figure 7. Location o the Mounting Screw Holes..................................................................... 42
Figure 8. Installing the Processor in the Processor Socket...................................................... 43
Figure 9. Attaching the Heat Sink to the Processor................................................................. 43
Figure 10. Attaching the Fan Heat Sink Clips to the Processor Socket ................................... 44
Figure 11. Connecting the Processor Fan Cable to the Processor Fan Connector.................. 45
Figure 12. Removing the Battery............................................................................................. 48
Figure 13. Connecting the IDE Cable...................................................................................... 49
Figure 14. BIOS Con iguration Jumper Block Location............................................................ 50
Figure 15. Power and Hardware Control Connectors............................................................... 84
Figure 16. Add-in Board and Peripheral Inter ace Connectors ................................................ 85
ables
Table 1. Server Board Features.................................................................................. 9
Table 2. Supported Processors................................................................................. 13
Table 3. Supported Memory Con igurations.............................................................. 13
Table 4. Supervisor and User Password Functions................................................... 24
Table 5. E ects o Pressing the Power Switch.......................................................... 27
Table 6. Power States and Targeted System Power................................................. 28
Table 7. Wake-up Devices and Events...................................................................... 29
Table 8. Fan Connector Function/Operation ............................................................. 30
Table 9. PCI Bus Characteristics............................................................................... 33
Table 10. PCI Bus Con iguration IDs........................................................................... 33
Table 11. Video Modes............................................................................................... 35
Table 12. Jumper Settings or the BIOS Setup Program Modes ................................. 50
Table 13. BIOS Setup Program Menu Bar.................................................................. 56

Contents vii
Table 14. BIOS Setup Program Function Keys........................................................... 57
Table 15. Maintenance Menu...................................................................................... 57
Table 16. Extended Con iguration Submenu............................................................... 58
Table 17. Main Menu .................................................................................................. 59
Table 18. Advanced Menu .......................................................................................... 60
Table 19. PCI Con iguration Submenu........................................................................ 61
Table 20. Boot Con iguration Submenu....................................................................... 62
Table 21. Peripheral Con iguration Submenu.............................................................. 63
Table 22. IDE Con iguration Submenu........................................................................ 65
Table 23. Primary/Secondary IDE Master/Slave Submenus ....................................... 66
Table 24. Diskette Con iguration Submenu................................................................. 67
Table 25. Event Log Con iguration Submenu.............................................................. 68
Table 26. Video Con iguration Submenu..................................................................... 69
Table 27. Security Menu............................................................................................. 70
Table 28. Power Menu................................................................................................ 71
Table 29. ACPI Submenu............................................................................................ 71
Table 30. Boot Menu................................................................................................... 72
Table 31. Boot Device Priority Submenu..................................................................... 73
Table 32. Hard Disk Drives Submenu......................................................................... 74
Table 33. Removable Devices Submenu .................................................................... 74
Table 34. ATAPI CDROM Drives Submenu................................................................ 75
Table 35. Exit Menu.................................................................................................... 75
Table 36. Beep Codes ................................................................................................ 77
Table 37. BIOS Error Messages ................................................................................. 78
Table 38. System Memory Map .................................................................................. 86
Table 39. DMA Channels............................................................................................ 86
Table 40. I/O Map....................................................................................................... 87
Table 41. Interrupts..................................................................................................... 88
Table 42. Product Certi ication Markings..................................................................... 92

viii Intel Server Board S845WD1-E (S845WD1H) Product Guide

9
1 Description
Server Board Features
able 1. Server Board Features
Feature Description
Processors Support or an Intel® Pentium® 4 processor in a µPGA478 socket
Support or an Intel® Celeron® processor in a µPGA478 socket
400/533 MHz Supported
Memory • Two 184-pin DDR SDRAM Dual Inline Memory Module (DIMM) sockets
• Support or up to 2 GB ECC system memory
• Support or single-sided or double-sided DIMMs (DDR 200/266)
Chipset Intel® 845E Chipset, consisting o :
• Intel® 82845E Memory Controller Hub (MCH)
• Intel® 82801BA I/O Controller Hub (ICH2)
• Intel® 82802AB 4 Mbit Firmware Hub (FWH)
I/O Control SMSC LPC47M102 LPC bus I/O controller
Peripheral Inter aces • Two external USB ports with an additional internal header providing two
optional USB ports or ront panel support
• One serial port and one serial port header
• One parallel port
• Two IDE inter aces with UDMA 33, ATA-66/100 support
• One loppy drive inter ace with support or two drives (Diskette A and
Diskette B)
• PS/2† keyboard and mouse ports
Expansion Capabilities One independent PCI bus (32-bit/33 MHz, 5 V) with three PCI connectors and
our embedded devices:
• 2D/3D graphics controller – ATI Rage† XL Video Controller with 8 MB o
SDRAM
• Two Intel® 10/100 82550PM Fast Ethernet Controllers
• ATA-100 controller, Promise Technology† PDC20267
BIOS Intel/AMI BIOS with support or:
• Advanced Con iguration and Power Inter ace (ACPI)
• Plug and Play
• SMBIOS
Power Management Support or ACPI
• Wake on PME
• Wake on Ring (WOR)
• Wake on LAN† (WOL)
Form Factor SSI-compliant

10 Intel Server Board S845WD1-E (S845WD1H) Product Guide
Back Panel Connectors
The back panel connectors are color-coded in compliance with PC 99 recommendations.
OM14342
ACF
BD HEG I
A. PS/2 mouse
B. PS/2 keyboard
C. Parallel port
D. Serial port A
E. Video port
F. NIC 1
G. USB port 1
H. USB port 2
I. NIC 2
Figure 1. Back Panel Connectors

Description 11
Front Panel Connectors
Figure 2 shows the location of the front panel connectors.
TP00011
AB
A. Front panel header
B. HDD LED
Figure 2. Front Panel Connectors

12 Intel Server Board S845WD1-E (S845WD1H) Product Guide
Server Board Connector and Component Locations
TP00010
ABDE
F
G
H
I
J
K
L
M
N
OPQRS
T
U
VWX
Y
Z
AA
C
CC
BB
A. PCI expansion slots
B. ATI Rage XL Video Controller
C. Chassis intrusion connector
D. AGP connector
E. Back panel connectors
F. System an ( an 2)
G. 12 V auxiliary power connector
H. µPGA478 processor socket
I. Intel 82845E memory controller hub (MCH)
J. Chassis an
K. DIMM1 socket
L. DIMM0 socket
M. Serial port B connector
N. Main power connector
O. Secondary IDE connector
P. Primary IDE connector
Q. Floppy drive connector
R. System an ( an 3)
S. Intel 82801BA I/O controller hub (ICH2)
T. HDD LED connector
U. Con iguration jumper block
V. Front panel header
W. System an ( an 1)
X. Secondary RAID IDE connector
Y. Primary RAID IDE connector
Z. Battery
AA. Front panel USB connector
BB. Promise ATA RAID controller connector
CC. Speaker
Figure 3. Server Board Components

Description 13
Processors
The S8 5WD1H board supports a single Intel Pentium processor with a µPGA 78 socket.
Processors are not included with the server board and must be purchased separately.
able 2. Supported Processors
ype Designation System Bus L2 Cache Size
Pentium 4 processor with
Hyperthreading (HT) Technology 3.06 GHz 533 MHz 512 KB
Pentium 4 processor 2.26, 2.53, 2.66, and 2.8 GHz 533 MHz 512 KB
Pentium 4 processor 2.0A, 2.40B, and 2.6 GHz 400 MHz 512 KB
Intel Celeron processor 1.7, 1.8, and 1.9 GHz 400 MHz 128 KB
Memory
The S8 5WD1H server board contains two 18 -pin DIMM sockets and supports up to two DDR
SDRAM DIMMs. The minimum supported memory configuration is 6 MB and the maximum
configurable memory size is a 2 GB stacked un-buffered DDR200/266 ECC DIMM. See the table
below for supported memory configurations.
✏ NO E
Only low profile DIMMs can be supported in a 1U server chassis.
Check the Intel Customer Support website for the latest tested memory list:
http://support.intel.com/support/motherboards/server/S845WD1-E
able 3. Supported Memory Configurations
DIMM
Capacity Number of Sides DDR SDRAM Density DDR SDRAM Organization Front-side/Back-side Number of DDR SDRAM Devices
64 MB SS 64 Mbit 8 M x 8/empty 8
64 MB SS 128 Mbit 8 M x 16/empty 4
128 MB DS 64 Mbit 8 M x 8/8 M x 8 16 (Note 1)
128 MB SS 128 Mbit 16 M x 8/empty 8
128 MB SS 256 Mbit 16 M x 16/empty 4
256 MB DS 128 Mbit 16 M x 8/16 M x 8 16 (Notes 1 and 2)
256 MB SS 256 Mbit 32 M x 8/empty 8
256 MB SS 512 Mbit 32 M x 16/empty 4
512 MB DS 256 Mbit 32 M x 8/32 M x 8 16 (Notes 1 and 2)
512 MB SS 512 Mbit 64 M x 8/empty 8
1024 MB DS 512 Mbit 64 M x 8/64 M X8 16
Notes:
1. I the number o DDR SDRAM devices is greater than nine, the DIMM will be double sided.
2. Front side population/back side population indicated or DDR SDRAM density and DDR SDRAM organization.

14 Intel Server Board S845WD1-E (S845WD1H) Product Guide
DIMM and memory configurations must adhere to the following:
• 2.5 V (only) 18 -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: 6 MB
• 200/266 MHz DDR SDRAM DIMMs only
• Serial Presence Detect (SPD)
• Suspend to RAM
• Non-ECC and ECC DIMMs
• Only DIMMs tested and qualified by Intel or a designated memory test vendor will be
supported on the S8 5WD1H server board. A list of qualified DIMMs will be made available.
Note that all DIMMs are supported by design, but only fully qualified DIMMs will be
supported.
Intel 845E Chipset
The Intel 8 5E chipset consists of the following devices:
• Intel 828 5E 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.
Intel 82845E Memory Controller Hub (MCH)
The MCH supports the data integrity features supported by the Pentium Pro bus, including address,
request, and response parity. The 8 5E chipset always generates ECC data while it is driving the
processor data bus, although the data bus ECC can be disabled or enabled by BIOS. It is enabled
by default.
The MCH provides the following:
• An integrated Synchronous DRAM memory controller with auto detection of SDRAM.
• Support for ACPI Rev 1.0b compliant power management.

Description 15
Intel 82801BA I/O Controller Hub (ICH2)
The Intel 82801BA ICH2 has these features:
• 33 MHz Peripheral Component Interface (PCI) Local Bus slots supporting PCI
specification, Rev 2.2.
• Support for the Low Pin Count (LPC) interface.
• Integrated IDE controller (supports Ultra ATA-66/100 mode and Ultra DMA 33 mode).
• Integrated LAN media access controller.
• Universal Serial Bus Interface with two USB controllers providing two back panel ports, and
the option for two front panel ports, in a Universal Host Controller Interface (UHCI)
implementation.
• Power management logic (ACPI Rev 1.0b compliant).
• Support for the System Management Bus routed to:
 All PCI Slots
 S5 wake from all PCI slots
• Real-Time Clock (with 256-byte battery backed CMOS RAM).
• Supports two Master/DMA devices.
Intel 82802AB Firmware Hub (FWH)
The Intel 82802AB Firmware Hub (FWH) includes a megabit symmetrical flash memory device.
Internally, the device is grouped into eight 6 KB blocks that are individually erasable, lockable,
and unlockable.
The FWH provides the following:
• System BIOS program
• Logic that enables protection for storing and updating of platform information
I/O Controller
The SMSC LPC 7M102 I/O Controller provides the following features:
• Low pin count (LPC) interface
• 3.3 V operation
• One serial port and one serial port header
• 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 two 1.2 MB, 1. MB, or 2.88 MB diskette drives
• Intelligent power management, including a programmable wake up event interface
• PCI power management support
• Fan control:
 Four fan control outputs
 Four fan tachometer inputs
The BIOS Setup program provides configuration options for the I/O controller.

16 Intel Server Board S845WD1-E (S845WD1H) Product Guide
Serial Ports
The S8 5WD1H server board has one serial port connector and one serial port header. The serial
port A connector is located on the back panel. The serial port B header is located near the main
power connector. The serial ports’ NS16C550-compatible UART supports data transfers at speeds
up to 115.2 kb/s with BIOS support.
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†-compatible mode)
• Bi-directional (PS/2 compatible)
• EPP
• ECP
Diskette Drive Controller
The I/O controller supports two diskette drives that are compatible with the 82077 diskette drive
controller and supports both PC-AT and PS/2 modes.
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† circuit that, like a self-healing fuse, reestablishes the
connection after an overcurrent condition is removed.
✏ NO E
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.
Hardware Management Subsystem
The Hardware Management features enable the board to be compatible with the Wired for
Management (WfM) specification. The board has several hardware management features,
including the following:
• Fan monitoring
• Thermal and voltage monitoring
• Chassis intrusion detection

Description 17
Hardware Management ASIC
The Hardware Management ASIC 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 (+5 V, +3.3 V, +1.5 V, 3.3 VSB, and Vccp) to detect levels above or
below acceptable values
• SMBus interface
Fan Monitoring
The Hardware Management ASIC provides four fan tachometer inputs. Monitoring can be
implemented using Intel® LANDesk® Client Manager or third-party software.
Chassis Intrusion and Detection
The S8 5WD1H server board supports 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. When the chassis cover is removed the mechanical switch is in
the closed position.
✏ NO E
Chassis intrusion detection may be implemented using Intel LANDesk
Client Manager or third-party software.
Real- ime Clock, CMOS SRAM, and Battery
The real-time clock provides a time-of-day clock and a multi-century 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.
✏ NO E
If the battery and AC power fail, custom defaults, if previously saved, will
be loaded into CMOS RAM at power-on.

18 Intel Server Board S845WD1-E (S845WD1H) Product Guide
Legacy USB Support
Legacy USB support enables USB devices such as keyboard, 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.
The S8 5WD1H server board has four USB 1.1 ports; one USB peripheral can be connected to
each port. For more than four USB devices, an external hub can be connected to any of the ports.
Two of the USB ports are implemented with stacked back panel connectors; the other two are
accessible via the front panel USB header. The S8 5WD1H server board fully supports UHCI and
uses UHCI-compatible software drivers.
✏ NO E
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.
Legacy USB support operates as follows:
1. When the user applies power to the computer, legacy support is disabled.
2. POST begins.
3. Legacy USB support is enabled by the BIOS allowing the user to use a USB keyboard to enter
and configure the BIOS Setup program and the maintenance menu.
. POST completes.
5. The operating system loads. While the operating system is loading, USB keyboard and mice
are recognized and may be used to configure the operating system. (Keyboard 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.
✏ NO E
Legacy USB support is for keyboard, mice, and hubs only. Other USB
devices are not supported in legacy mode.

Description 19
IDE Support
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 transfer rates up to 100 MB/sec.
✏ NO E
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.
The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS)
translation modes. The drive reports the transfer rate and translation mode to the BIOS.
The S8 5WD1H server board supports 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:
• ARMD-FDD (ATAPI removable media device – floppy disk drive)
• ARMD-HDD (ATAPI removable media device – hard disk drive)
SCSI Hard Drive Activity LED Connector
The SCSI hard drive activity LED connector is a 1 x 2-pin connector that allows an add-in
SCSI controller to use the same LED as the onboard IDE controller. For proper operation, this
connector should be wired to the LED output of the add-in SCSI controller. The LED indicates
when data is being read from, or written to, both the add-in SCSI controller and the IDE controller.

20 Intel Server Board S845WD1-E (S845WD1H) Product Guide
BIOS
The S8 5WD1H server board uses 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.
The S8 5WD1H server board supports system BIOS shadowing, allowing the BIOS to execute
from 6 -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 BIOS is identified as PT8 510A.86B.
When the S8 5WD1H server board’s jumper is set to configuration mode and the server is
powered-up, the BIOS compares the processor version and the microcode version in the BIOS and
reports if the two match.
PCI Auto Configuration
The BIOS can automatically configure PCI devices. PCI devices may be onboard or add-in cards.
Auto configuration 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. Auto configuration information is stored in
ESCD format.
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.
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 , 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
✏ NO E
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.