Intel® Desktop Board
D915PLWD
Technical Product Specification
June 2005
Order Number: D23930-001US
The Intel® Desktop Board D915PLWD 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 D915PLWD Specification Update.
Revision History
Revision
-001
Revision History
First release of the
Specification.
Date
Intel®
Desktop Board D915PLWD Technical Product
June 2005
This product specification applies to only standard Intel Desktop Board D915PLWD with BIOS
identifier VG91510A.86A.
Changes to this specification will be published in the Intel Desktop Board D915PLWD
Specification Update before being incorporated into a revision of this document.
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published specifications. Current characterized errata are available on request.
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Copyright © 2005, Intel Corporation. All rights reserved.
Preface
This Technical Product Specification (TPS) specifies the board layout, components, connectors,
power and environmental requirements, and the BIOS for the Intel® Desktop Board D915PLWD.
It describes the standard product and available manufacturing options.
Intended Audience
The TPS is intended to provide detailed, technical information about the Desktop Board
D915PLWD and its components to the vendors, system integrators, and other engineers and
technicians who need this level of information. It is specifically not intended for general audiences.
What This Document Contains
Chapter
1
2
3
4
Description
A description of the hardware used on the Desktop Board D915PLWD
A map of the resources of the Desktop Board
The features supported by the BIOS Setup program
A description of the BIOS error messages, beep codes, and POST codes
Typographical Conventions
This section contains information about the conventions used in this specification. Not all of these
symbols and abbreviations appear in all specifications of this type.
Notes, Cautions, and Warnings
NOTE
Notes call attention to important information.
#
INTEGRATOR’S NOTES
Integrator’s notes are used to call attention to information that may be useful to system integrators.
CAUTION
Cautions are included to help you avoid damaging hardware or losing data.
WARNING
Warnings indicate conditions, which if not observed, can cause personal injury.
iii
Intel Desktop Board D915PLWD Technical Product Specification
Other Common Notation
iv
#
Used after a signal name to identify an active-low signal (such as USBP0#)
(NxnX)
When used in the description of a component, N indicates component type, xn are the relative
coordinates of its location on the board, 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.
Contents
1 Product Description
1.1
Overview.................................................................................................................... 10
1.1.1
Feature Summary........................................................................................ 10
1.1.2
Board Layout ............................................................................................... 12
1.1.3
Block Diagram ............................................................................................. 14
1.2 Online Support ........................................................................................................... 15
1.3 Processor................................................................................................................... 15
1.4 System Memory ......................................................................................................... 16
1.4.1
Memory Configurations................................................................................ 17
1.5 Intel® 915PL Chipset.................................................................................................. 20
1.5.1
USB ............................................................................................................. 20
1.5.2
IDE Support ................................................................................................. 20
1.5.3
Real-Time Clock, CMOS SRAM, and Battery .............................................. 22
1.6 PCI Express* Connectors .......................................................................................... 22
1.7 Legacy I/O Controller ................................................................................................. 23
1.7.1
Serial Port.................................................................................................... 23
1.7.2
Parallel Port ................................................................................................. 23
1.7.3
Diskette Drive Controller .............................................................................. 23
1.7.4
Keyboard and Mouse Interface.................................................................... 23
1.8 Audio Subsystem ....................................................................................................... 24
1.8.1
Audio Subsystem Software.......................................................................... 24
1.8.2
Audio Connectors ........................................................................................ 24
1.8.3
Intel® High Definition Audio Subsystem ....................................................... 25
1.9 LAN Subsystem ......................................................................................................... 26
1.9.1
10/100 Mbits/sec LAN Subsystem ............................................................... 26
1.9.2
LAN Subsystem Software ............................................................................ 27
1.10 Hardware Management Subsystem ........................................................................... 27
1.10.1 Hardware Monitoring and Fan Control ASIC ................................................ 27
1.10.2 Thermal Monitoring...................................................................................... 28
1.10.3 Fan Monitoring............................................................................................. 29
1.10.4 Chassis Intrusion and Detection .................................................................. 29
1.11 Power Management ................................................................................................... 29
1.11.1 ACPI ............................................................................................................ 29
1.11.2 Hardware Support........................................................................................ 32
2 Technical Reference
2.1
2.2
2.3
2.4
2.5
2.6
2.7
Memory Map .............................................................................................................. 37
DMA Channels........................................................................................................... 38
Fixed I/O Map ............................................................................................................ 39
PCI Configuration Space Map.................................................................................... 40
Interrupts.................................................................................................................... 41
PCI Conventional* Interrupt Routing Map .................................................................. 42
Connectors ................................................................................................................ 43
2.7.1
Back Panel Connectors ............................................................................... 43
2.7.2
Component-side Connectors ....................................................................... 44
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Intel Desktop Board D915PLWD Technical Product Specification
2.8
2.9
2.10
2.11
2.12
2.13
2.14
2.7.3
Front Panel USB Connectors ........................................................................ 51
Jumper Block ............................................................................................................... 52
Mechanical Considerations .......................................................................................... 53
2.9.1
Form Factor ................................................................................................... 53
2.9.2
I/O Shield....................................................................................................... 54
Electrical Considerations.............................................................................................. 55
2.10.1 DC Loading.................................................................................................... 55
2.10.2 Add-in Board Considerations......................................................................... 55
2.10.3 Fan Connector Current Capability ................................................................. 56
2.10.4 Power Supply Considerations ....................................................................... 56
Thermal Considerations ............................................................................................... 57
Reliability...................................................................................................................... 59
Environmental .............................................................................................................. 60
Regulatory Compliance................................................................................................ 61
2.14.1 Safety Regulations ........................................................................................ 61
2.14.2 EMC Regulations........................................................................................... 61
2.14.3 European Union Declaration of Conformity Statement.................................. 62
2.14.4 Product Ecology Statements ......................................................................... 63
2.14.5 Product Certification Markings (Board Level) ................................................ 64
3 Overview of BIOS Features
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
Introduction .................................................................................................................. 65
BIOS Flash Memory Organization ............................................................................... 66
Resource Configuration ............................................................................................... 66
3.3.1
PCI Autoconfiguration.................................................................................... 66
3.3.2
PCI IDE Support ............................................................................................ 66
System Management BIOS (SMBIOS) ........................................................................ 67
Legacy USB Support.................................................................................................... 67
BIOS Updates .............................................................................................................. 68
3.6.1
Language Support ......................................................................................... 68
3.6.2
Custom Splash Screen.................................................................................. 68
Boot Options ................................................................................................................ 69
3.7.1
CD-ROM Boot ............................................................................................... 69
3.7.2
Network Boot ................................................................................................. 69
3.7.3
Booting Without Attached Devices ................................................................ 69
3.7.4
Changing the Default Boot Device During POST .......................................... 69
Adjusting Boot Speed................................................................................................... 70
3.8.1
Peripheral Selection and Configuration ......................................................... 70
3.8.2
BIOS Boot Optimizations............................................................................... 70
BIOS Security Features ............................................................................................... 71
4 Error Messages and Beep Codes
4.1
4.2
4.3
4.4
4.5
vi
BIOS Error Messages .................................................................................................. 73
Port 80h POST Codes ................................................................................................. 75
Bus Initialization Checkpoints ...................................................................................... 79
Speaker ....................................................................................................................... 80
BIOS Beep Codes........................................................................................................ 80
Contents
Figures
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
Board Components ...................................................................................................... 12
Block Diagram.............................................................................................................. 14
Memory Channel and DIMM Configuration .................................................................. 17
Dual Channel (Interleaved) Mode Configuration with Two DIMMs .............................. 18
Single Channel (Asymmetric) Mode Configuration with One DIMM............................. 19
Single Channel (Asymmetric) Mode Configuration with Two DIMMs........................... 19
Front/Back Panel Audio Connector Options for High Definition Audio Subsystem...... 25
High Definition Audio Subsystem Block Diagram ........................................................ 25
LAN Connector LED Locations .................................................................................... 26
Location of Thermal Sensors and Fan Connectors...................................................... 28
Location of the Standby Power Indicator LED ............................................................. 35
Back Panel Connectors................................................................................................ 43
Component-side Connectors ....................................................................................... 44
Connection Diagram for Front Panel Connector .......................................................... 49
Connection Diagram for Front Panel USB Connectors................................................ 51
Location of the Jumper Block....................................................................................... 52
Board Dimensions........................................................................................................ 53
I/O Shield Dimensions.................................................................................................. 54
Processor Heatsink for Omni-directional Airflow.......................................................... 57
Localized High Temperature Zones ............................................................................. 58
Tables
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
Feature Summary ........................................................................................................ 10
Board Components Shown in Figure 1 ........................................................................ 13
Supported System Bus Frequency and Memory Speed Combinations ....................... 16
Supported Memory Configurations .............................................................................. 16
LAN Connector LED States ......................................................................................... 27
Effects of Pressing the Power Switch .......................................................................... 30
Power States and Targeted System Power ................................................................. 31
Wake-up Devices and Events ...................................................................................... 32
System Memory Map ................................................................................................... 37
DMA Channels ............................................................................................................. 38
I/O Map ........................................................................................................................ 39
PCI Configuration Space Map...................................................................................... 40
Interrupts ...................................................................................................................... 41
PCI Interrupt Routing Map ........................................................................................... 42
Back Panel Connectors Shown in Figure 12................................................................ 43
Component-side Connectors Shown in Figure 13 ....................................................... 45
Front Panel Audio Connector....................................................................................... 46
Chassis Intrusion Connector ........................................................................................ 46
Serial ATA Connectors................................................................................................. 46
Processor Fan Connector ............................................................................................ 46
Chassis Fan Connectors.............................................................................................. 46
Main Power Connector................................................................................................. 47
ATX12V Power Connector ........................................................................................... 47
Auxiliary Front Panel Power/Sleep LED Connector ..................................................... 48
Front Panel Connector ................................................................................................. 49
vii
Intel Desktop Board D915PLWD Technical Product Specification
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
47.
viii
States for a One-Color Power LED .............................................................................. 50
States for a Two-Color Power LED .............................................................................. 50
BIOS Setup Configuration Jumper Settings................................................................. 52
DC Loading Characteristics ......................................................................................... 55
Fan Connector Current Capability................................................................................ 56
Thermal Considerations for Components .................................................................... 59
Environmental Specifications ....................................................................................... 60
Safety Regulations ....................................................................................................... 61
EMC Regulations ......................................................................................................... 61
Product Certification Markings ..................................................................................... 64
BIOS Setup Program Menu Bar................................................................................... 66
BIOS Setup Program Function Keys............................................................................ 66
Boot Device Menu Options .......................................................................................... 69
Supervisor and User Password Functions ................................................................... 71
BIOS Error Messages .................................................................................................. 73
Uncompressed INIT Code Checkpoints....................................................................... 75
Boot Block Recovery Code Checkpoints ..................................................................... 75
Runtime Code Uncompressed in F000 Shadow RAM ................................................. 76
Bus Initialization Checkpoints ...................................................................................... 79
Upper Nibble High Byte Functions ............................................................................... 79
Lower Nibble High Byte Functions ............................................................................... 80
Beep Codes ................................................................................................................. 80
1 Product Description
What This Chapter Contains
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
1.11
Overview ...................................................................................................................... 10
Online Support ............................................................................................................. 15
Processor ..................................................................................................................... 15
System Memory ........................................................................................................... 16
Intel® 915PL Chipset.................................................................................................... 20
PCI Express Connectors.............................................................................................. 22
Legacy I/O Controller ................................................................................................... 23
Audio Subsystem ......................................................................................................... 24
LAN Subsystem ........................................................................................................... 26
Hardware Management Subsystem............................................................................. 27
Power Management ..................................................................................................... 29
9
Intel Desktop Board D915PLWD Technical Product Specification
1.1 Overview
1.1.1
Feature Summary
Table 1 summarizes the major features of the board.
Table 1.
Feature Summary
Form Factor
ATX (12.00 inches by 9.60 inches [304.80 millimeters by 243.84 millimeters])
Processor
Support for an Intel® Pentium® 4 processor in an LGA775 socket with an 800 or
533 MHz system bus
Memory
• Two DDR SDRAM Dual Inline Memory Module (DIMM) sockets
• Support for DDR 400 MHz and DDR 333 MHz DIMMs
• Support for up to 2 GB of system memory
Chipset
Intel® 915PL Chipset, consisting of:
• Intel® 82915PL Graphics Memory Controller Hub (MCH)
• Intel® 82801FB I/O Controller Hub (ICH6)
• 4 Mbit Firmware Hub (FWH)
Video
One PCI Express* x16 bus add-in card connector
Audio
Intel® High Definition Audio subsystem using the Realtek ALC860VU audio codec
Legacy I/O Control
Legacy I/O controller for diskette drive, serial, parallel, and PS/2* ports
USB
Support for USB 2.0 devices
Peripheral
Interfaces
• Eight USB ports
• One serial port
• One parallel port
• Four Serial ATA interfaces
• One Parallel ATA IDE interface with UDMA 33, ATA-66/100 support
• One diskette drive interface
• PS/2 keyboard and mouse ports
LAN Support
10/100 Mbits/sec LAN subsystem using the Intel® 82562GZ Platform LAN Connect
(PLC) device
BIOS
• Intel/AMI BIOS (resident in the 4 Mbit FWH)
• Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,
and SMBIOS
continued
10
Product Description
Table 1.
Feature Summary (continued)
Expansion
Capabilities
• Four PCI Conventional* bus connectors
• Two PCI Express x1 bus add-in card connectors
• One PCI Express x16 bus add-in card connector
Instantly Available
PC Technology
• Support for PCI Local Bus Specification Revision 2.2
• Support for PCI Express Revision 1.0a
• Suspend to RAM support
• Wake on PCI, RS-232, front panel, PS/2 devices, and USB ports
Hardware Monitor
Subsystem
• 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
• Three fan connectors
• Three fan sense inputs used to monitor fan activity
• Fan speed control
For information about
Refer to
Available configurations for the Desktop Board D915PLWD
Section 1.2, page 15
11
Intel Desktop Board D915PLWD Technical Product Specification
1.1.2
Board Layout
Figure 1 shows the location of the major components.
A
B
C D
E F G
H
I
J
K
DD
L
M
N
CC
BB
O
Z
AA
X
Y
V
W
U T
S
R
Q
P
OM17971
Figure 1. Board Components
Table 2 lists the components identified in Figure 1.
12
Product Description
Table 2.
Board Components Shown in Figure 1
Item/callout
from Figure 1
Description
A
Speaker
B
PCI Express x1 bus add-in card connectors [2]
C
Realtek ALC860VU audio codec
D
Front panel audio connector
E
PCI Conventional bus add-in card connectors [2]
F
Ethernet PLC device
G
PCI Express x16 bus add-in card connector
H
Rear chassis fan connector
I
Back panel connectors
J
+12V power connector (ATX12V)
K
LGA775 processor socket
L
Processor fan connector
M
Intel 82915PL MCH
N
DIMM Channel A socket
O
DIMM Channel B socket
P
Legacy I/O controller
Q
Power connector
R
Diskette drive connector
S
Parallel ATA IDE connector
T
Battery
U
Chassis intrusion connector
V
BIOS Setup configuration jumper block
W
4 Mbit Firmware Hub (FWH)
X
Front chassis fan connector
Y
Serial ATA connectors [4]
Z
Auxiliary front panel power LED connector
AA
Front panel connector
BB
Front panel USB connectors [2]
CC
Intel 82801FB I/O Controller Hub (ICH6)
DD
PCI Conventional bus add-in card connectors [2]
13
Intel Desktop Board D915PLWD Technical Product Specification
1.1.3
Block Diagram
Figure 2 is a block diagram of the major functional areas of the board.
PCI Express x1 Interface
PCI Express x1 Slot 1
Back Panel/
Front Panel
USB Ports
USB
PCI Express x1 Slot 2
Serial Ports
Parallel ATA
IDE Connector
LPC Bus
I/O
Controller
Parallel ATA
IDE Interface
Parallel Port
PS/2 Mouse
PS/2 Keyboard
LGA775
Processor Socket
System Bus
(800/533 MHz)
Diskette Drive
Connector
PCI Express
x16 Interface
Intel 82915PL
Memory Controller
Hub (MCH)
PCI Express
x16
Connector
DMI Interconnect
LPC Bus
Intel 82801FB
I/O Controller Hub
(ICH6)
4 Mbit
Firmware Hub
(FWH)
Intel 915PL Chipset
High Definition Audio Link
LAN Connect
Interface
Dual-Channel
Memory Bus
SMBus
Channel A
DIMM
Channel B
DIMM
10/100
LAN PLC
Serial ATA
IDE Interface
LAN
Connector
Serial ATA IDE
Connectors (4)
PCI Bus
Mic In/Retasking Jack B
PCI Slot 1
Line In/Retasking Jack C
PCI Slot 2
SMBus
PCI Slot 3
PCI Slot 4
Audio
Codec
Hardware Monitoring
and Fan Control ASIC
Line Out/Retasking Jack D
Retasking Jack E [Port 1]
Retasking Jack F [Port 2]
= connector or socket
OM17972
Figure 2. Block Diagram
14
Product Description
1.2 Online Support
To find information about…
Visit this World Wide Web site:
Intel Desktop Board D915PLWD under
“Desktop Board Products” or “Desktop
Board Support”
http://www.intel.com/design/motherbd
http://support.intel.com/support/motherboards/desktop
Available configurations for the Desktop
Board D915PLWD
http://developer.intel.com/design/motherbd/wd/wd_available.htm
Processor data sheets
http://www.intel.com/design/litcentr
ICH6 addressing
http://developer.intel.com/products/chipsets
Custom splash screens
http://intel.com/design/motherbd/gen_indx.htm
Audio software and utilities
http://www.intel.com/design/motherbd
LAN software and drivers
http://www.intel.com/design/motherbd
1.3 Processor
The board is designed to support Intel Pentium 4 processors in an LGA775 processor socket with an
800 or 533 MHz system bus. See the Intel web site listed below for the most up-to-date list of
supported processors.
For information about…
Refer to:
Supported processors for the
D915PLWD board
http://www.intel.com/design/motherbd/wd/wd_documentation.htm
CAUTION
Use only the processors listed on web site above. Use of unsupported processors can damage the
board, the processor, and the power supply.
#
INTEGRATOR’S NOTE
•
•
Use only ATX12V-compliant power supplies.
Refer to Table 3 on page 16 for a list of supported system bus frequency and memory speed
combinations.
For information about
Refer to
Power supply connectors
Section 2.7.2.1, page 47
15
Intel Desktop Board D915PLWD Technical Product Specification
1.4 System Memory
The board has two DIMM sockets and support the following memory features:
•
•
2.5 V (only) DDR SDRAM DIMMs with gold-plated contacts
Unbuffered, single-sided or double-sided DIMMs with the following restriction:
Double-sided DIMMS with x16 organization are not supported.
•
•
•
•
•
2 GB maximum total system memory
Minimum total system memory: 128 MB
Non-ECC DIMMs
Serial Presence Detect
DDR 400 MHz and DDR 333 MHz SDRAM DIMMs
Table 3 lists the supported system bus frequency and memory speed combinations.
Table 3.
Supported System Bus Frequency and Memory Speed Combinations
To use this type of DIMM…
The processor's system bus frequency must be…
DDR 400
800 MHz
DDR 333 (Note)
800 or 533 MHz
Note:
When using an 800 MHz system bus frequency processor, DDR 333 memory is clocked at 320 MHz. This minimizes
system latencies to optimize system throughput.
NOTES
To be fully compliant with all applicable DDR SDRAM memory specifications, the board should be
populated with DIMMs that support the Serial Presence Detect (SPD) data structure. This allows
the BIOS to read the SPD data and program the chipset to accurately configure memory settings
for optimum performance. If non-SPD memory is installed, the BIOS will attempt to correctly
configure the memory settings, but performance and reliability may be impacted or the DIMMs
may not function under the determined frequency.
Table 4 lists the supported DIMM configurations.
Table 4.
Supported Memory Configurations
DIMM
Capacity
Configuration
SDRAM
Density
SDRAM Organization
Front-side/Back-side
Number of SDRAM
Devices
128 MB
SS
256 Mbit
16 M x 16/empty
4
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
512 MB
SS
512 Mbit
64 M x 8/empty
8
512 MB
SS
1 Gbit
64 M x 16/empty
4
1024 MB
SS
1 Gbit
128 M x 8/empty
8
Note: In the second column, “DS” refers to double-sided memory modules (containing two rows of SDRAM) and “SS” refers
to single-sided memory modules (containing one row of SDRAM).
16
Product Description
1.4.1
Memory Configurations
The Intel 82915PL MCH supports two types of memory organization:
•
•
Dual channel (Interleaved) mode. This mode offers the highest throughput for real world
applications. Dual channel mode is enabled when the installed memory capacities of both
DIMM channels are equal. Technology and device width can vary from one channel to the
other but the installed memory capacity for each channel must be equal. If different speed
DIMMs are used between channels, the slowest memory timing will be used.
Single channel (Asymmetric) mode. This mode is equivalent to single channel bandwidth
operation for real world applications. This mode is used when only a single DIMM is installed
or the memory capacities are unequal. Technology and device width can vary from one
channel to the other. If different speed DIMMs are used between channels, the slowest
memory timing will be used.
Figure 3 illustrates the memory channel and DIMM configuration.
Channel A, DIMM 0
Channel B, DIMM 0
OM17973
Figure 3. Memory Channel and DIMM Configuration
17
Intel Desktop Board D915PLWD Technical Product Specification
1.4.1.1
Dual Channel (Interleaved) Mode Configuration
Figure 4 shows a dual channel configuration using two DIMMs. In this example, the DIMM
sockets are populated with identical DIMMs.
1 GB
Channel A, DIMM 0
1 GB
Channel B, DIMM 0
OM17974
Figure 4. Dual Channel (Interleaved) Mode Configuration with Two DIMMs
18
Product Description
1.4.1.2
Single Channel (Asymmetric) Mode Configurations
NOTE
Dual channel (Interleaved) mode configurations provide the highest memory throughput.
Figure 5 shows a single channel configuration using one DIMM. In this example, only Channel A
is populated. Channel B is not populated.
256 MB
Channel A, DIMM 0
Channel B, DIMM 0
OM17975
Figure 5. Single Channel (Asymmetric) Mode Configuration with One DIMM
Figure 6 shows a single channel configuration using two DIMMs. In this example, the capacity of
the DIMM in Channel A does not equal the capacity of the DIMM in Channel B.
256 MB
Channel A, DIMM 0
512 MB
Channel B, DIMM 0
OM17976
Figure 6. Single Channel (Asymmetric) Mode Configuration with Two DIMMs
19
Intel Desktop Board D915PLWD Technical Product Specification
1.5 Intel® 915PL Chipset
The Intel 915PL chipset consists of the following devices:
•
•
•
Intel 82915PL Memory Controller Hub (MCH) with Direct Media Interface (DMI) interconnect
Intel 82801FB I/O Controller Hub (ICH6) with DMI interconnect
Firmware Hub (FWH)
The MCH is a centralized controller for the system bus, the memory bus, the PCI Express bus, and
the DMI interconnect. The ICH6 is a centralized controller for the board’s I/O paths. The FWH
provides the nonvolatile storage of the BIOS.
For information about
Refer to
The Intel 915PL chipset
http://developer.intel.com/
Resources used by the chipset
Chapter 2
1.5.1
USB
The board supports up to eight USB 2.0 ports, supports UHCI and EHCI, and uses UHCI- and
EHCI-compatible drivers.
The ICH6 provides the USB controller for all ports. The port arrangement is as follows:
•
•
Four ports are implemented with dual stacked back panel connectors adjacent to the audio
connectors
Four ports are routed to two separate front panel USB connectors
NOTE
Computer systems that have an unshielded cable attached to a USB port may not meet FCC
Class B requirements, even if no device is attached to the cable. Use shielded cable that meets the
requirements for full-speed devices.
For information about
Refer to
The location of the USB connectors on the back panel
Figure 12, page 43
The location of the front panel USB connectors
Figure 13, page 44
1.5.2
IDE Support
The board providess five IDE interface connectors:
•
•
20
One parallel ATA IDE connector that supports two devices
Four serial ATA IDE connectors that support one device per connector
Product Description
1.5.2.1
Parallel ATA IDE Interface
The ICH6’s Parallel ATA IDE controller has one bus-mastering Parallel ATA IDE interface. The
Parallel ATA IDE interface supports the following modes:
•
•
•
•
•
Programmed I/O (PIO): processor controls data transfer.
8237-style DMA: DMA offloads the processor, supporting transfer rates of up to 16 MB/sec.
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 ICH6’s ATA-100
logic can achieve read transfer rates up to 100 MB/sec and write transfer rates up to 88 MB/sec.
NOTE
ATA-66 and ATA-100 are faster timings and require a specialized cable to reduce reflections,
noise, and inductive coupling.
The Parallel ATA IDE interface also supports ATAPI devices (such as CD-ROM drives) and ATA
devices using the transfer modes.
The BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS)
translation modes. The drive reports the transfer rate and translation mode to the BIOS.
For information about
Refer to
The location of the Parallel ATA IDE connector
Figure 13, page 44
1.5.2.2
Serial ATA Interfaces
The ICH6’s Serial ATA controller offers four independent Serial ATA ports with a theoretical
maximum transfer rate of 150 MB/s per port. One device can be installed on each port for a
maximum of four Serial ATA devices. A point-to-point interface is used for host to device
connections, unlike Parallel ATA IDE which supports a master/slave configuration and two devices
per channel.
For compatibility, the underlying Serial ATA functionality is transparent to the operating system.
The Serial ATA controller can operate in both legacy and native modes. In legacy mode, standard
IDE I/O and IRQ resources are assigned (IRQ 14 and 15). In Native mode, standard PCI
Conventional bus resource steering is used. Native mode is the preferred mode for configurations
using the Windows* XP and Windows 2000 operating systems.
NOTE
Many Serial ATA drives use new low-voltage power connectors and require adaptors or power
supplies equipped with low-voltage power connectors.
For more information, see: http://www.serialata.org/
For information about
Refer to
The location of the Serial ATA IDE connectors
Figure 13, page 44
21
Intel Desktop Board D915PLWD Technical Product Specification
1.5.3
Real-Time Clock, CMOS SRAM, and Battery
A coin-cell battery (CR2032) powers the real-time clock and CMOS memory. When the computer
is not plugged into a wall socket, the battery has an estimated life of three years. When the
computer is plugged in, the standby current from the power supply extends the life of the battery.
The clock is accurate to ± 13 minutes/year at 25 ºC with 3.3 VSB applied.
NOTE
If the battery and AC power fail, custom defaults, if previously saved, will be loaded into CMOS
RAM at power-on.
1.6 PCI Express* Connectors
The board provides the following PCI Express connectors:
•
•
One PCI Express x16 connector supporting simultaneous transfer speeds up to 8 GBytes/sec
Two PCI Express x1 connectors. The x1 interfaces support simultaneous transfer speeds up to
500 MBytes/sec
The PCI Express interface supports the PCI Conventional bus configuration mechanism so that the
underlying PCI Express architecture is compatible with PCI Conventional compliant operating
systems. Additional features of the PCI Express interface include the following:
•
•
•
•
•
•
22
Support for the PCI Express enhanced configuration mechanism
Automatic discovery, link training, and initialization
Support for Active State Power Management (ASPM)
SMBus 2.0 support
Wake# signal supporting wake events from ACPI S1, S3, S4, or S5
Software compatible with the PCI Power Management Event (PME) mechanism defined in the
PCI Power Management Specification Rev. 1.1
Product Description
1.7 Legacy I/O Controller
The legacy I/O controller provides the following features:
•
•
•
•
•
•
•
One serial port
One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port
(EPP) support
Serial IRQ interface compatible with serialized IRQ support for PCI Conventional bus systems
PS/2-style mouse and keyboard interfaces
Interface for one 1.44 MB or 2.88 MB diskette drive
Intelligent power management, including a programmable wake-up event interface
PCI Conventional bus power management support
The BIOS Setup program provides configuration options for the legacy I/O controller.
1.7.1
Serial Port
The Serial port A connector is located on the back panel. The serial port supports data transfers at
speeds up to 115.2 kbits/sec with BIOS support.
For information about
Refer to
The location of the serial port A connector
Figure 12, page 43
1.7.2
Parallel Port
The 25-pin D-Sub parallel port connector is located on the back panel. Use the BIOS Setup
program to set the parallel port mode.
For information about
Refer to
The location of the parallel port connector
Figure 12, page 43
1.7.3
Diskette Drive Controller
The legacy I/O controller supports one diskette drive. Use the BIOS Setup program to configure
the diskette drive interface.
For information about
Refer to
The location of the diskette drive connector
Figure 13, page 44
1.7.4
Keyboard and Mouse Interface
PS/2 keyboard and mouse connectors are located on the back panel.
NOTE
The keyboard is supported in the bottom PS/2 connector and the mouse is supported in the top PS/2
connector. Power to the computer should be turned off before a keyboard or mouse is connected or
disconnected.
For information about
Refer to
The location of the keyboard and mouse connectors
Figure 12, page 43
23
Intel Desktop Board D915PLWD Technical Product Specification
1.8 Audio Subsystem
The board supports the Intel High Definition audio subsystem based on the Realtek ALC860VU
codec. The audio subsystem supports the following features:
•
•
•
#
Advanced jack sense (front and rear panel) that enables the audio codec to recognize the device
that is connected to an audio port. All jacks are capable of retasking according to user’s
definition, or can be automatically switched depending on the recognized device type.
Stereo input and output for all jacks
A signal-to-noise (S/N) ratio of 90 dB
INTEGRATOR’S NOTE
For the front panel jack sensing and automatic retasking feature to function, a front panel daughter
card that is designed for Intel High Definition Audio must be used. Otherwise, an AC ’97 style
audio front panel connector will be assumed and the Line Out and Mic In functions will be
permanent.
1.8.1
Audio Subsystem Software
Audio software and drivers are available from Intel’s World Wide Web site.
For information about
Refer to
Obtaining audio software and drivers
Section 1.2, page 15
1.8.2
Audio Connectors
The board contains audio connector on both the back panel and the component side of the board.
The front panel audio connector is a 2 x 5-pin connector that provides mic in and line out signals
for front panel audio connectors.
24
For information about
Refer to
The location of the front panel audio connector
Figure 13, page 44
The signal names of the front panel audio connector
Table 17, page 46
Product Description
Intel® High Definition Audio Subsystem
1.8.3
The Intel High Definition Audio subsystem includes the following:
•
•
•
Intel 82801FB I/O Controller Hub (ICH6)
Realtek ALC860VU audio codec
Microphone input that supports a single dynamic, condenser, or electret microphone
The front and back audio connectors are configurable through the audio device drivers. The
available configurable audio ports are shown in Figure 7.
Back Panel
Audio Connectors
Front Panel
Audio Connectors
Mic In/
Retasking Jack E
[Port 1]
Line Out/
Retasking Jack F
[Port 2]
Line In/
Retasking Jack C
Line Out/
Retasking Jack D
Mic In/
Retasking Jack B
OM16989
Figure 7. Front/Back Panel Audio Connector Options for High Definition Audio Subsystem
Figure 8 is a block diagram of the High Definition audio subsystem.
Mic In/Retasking Jack B
82801FB
I/O Controller
Hub
(ICH6)
Intel
High Definition
Audio Link
Line In/Retasking Jack C
Audio Codec
Line Out/Retasking Jack D
Front Panel Mic In/Retasking Jack E [Port 1]
Front Panel Line Out/Retasking Jack F [Port 2]
OM17985
Figure 8. High Definition Audio Subsystem Block Diagram
For information about
The back panel audio connectors
Refer to
Figure 12, page 43
25
Intel Desktop Board D915PLWD Technical Product Specification
1.9 LAN Subsystem
The LAN subsystem consists of the following:
•
•
Physical layer interface device Intel 82562GZ PLC for 10/100 Mbits/sec Ethernet LAN
connectivity.
RJ-45 LAN connector with integrated status LEDs
Additional features of the LAN subsystem include:
•
•
•
CSMA/CD protocol engine
LAN connect interface that supports the 82562GZ
PCI Conventional bus power management
⎯ Supports ACPI technology
⎯ Supports LAN wake capabilities
1.9.1
10/100 Mbits/sec LAN Subsystem
The 10/100 Mbits/sec LAN subsystem includes the ICH6, the Intel 82562GZ PLC, and an RJ-45
LAN connector with integrated status LEDs.
1.9.1.1
Intel® 82562GZ Physical Layer Interface Device
The Intel 82562GZ provides the following functions:
•
•
•
•
1.9.1.2
Basic 10/100 Ethernet LAN connectivity
Full device driver compatibility
Programmable transit threshold
Configuration EEPROM that contains the MAC address
RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector (shown in Figure 9).
Green LED
Yellow LED
OM15076
Figure 9. LAN Connector LED Locations
26
Product Description
Table 5 describes the LED states when the board is powered up and the 10/100 Mbits/sec LAN
subsystem is operating.
Table 5.
LAN Connector LED States
LED Color
LED State
Condition
Green
Off
LAN link is not established.
On
LAN link is established.
Blinking
LAN activity is occurring.
Off
10 Mbits/sec data rate is selected.
On
100 Mbits/sec data rate is selected.
Yellow
1.9.2
LAN Subsystem Software
LAN software and drivers are available from Intel’s World Wide Web site.
For information about
Refer to
Obtaining LAN software and drivers
Section 1.2, page 15
1.10 Hardware Management Subsystem
The hardware management features enable the Desktop Boards to be compatible with the Wired for
Management (WfM) specification. The Desktop Board has several hardware management features,
including the following:
•
•
•
1.10.1
Fan monitoring and control (through the hardware monitoring and fan control ASIC)
Thermal and voltage monitoring
Chassis intrusion detection
Hardware Monitoring and Fan Control ASIC
The features of the hardware monitoring and fan control ASIC include:
•
•
•
•
•
Internal ambient temperature sensor
Two remote thermal diode sensors for direct monitoring of processor temperature and ambient
temperature sensing
Power supply monitoring of five voltages (+5 V, +12 V, +3.3 VSB, +1.5 V, and +VCCP) to
detect levels above or below acceptable values
Thermally monitored closed-loop fan control, for all three fans, that can adjust the fan speed or
switch the fans on or off as needed
SMBus interface
For information about
Refer to
The location of the fan connectors and sensors for thermal monitoring
Figure 10, page 28
27
Intel Desktop Board D915PLWD Technical Product Specification
1.10.2
Thermal Monitoring
Figure 10 shows the location of the sensors and fan connectors.
3
1
A
4
C
1
B
D
1
3
F
E
OM17977
Item
Description
A
Remote ambient temperature sensor
B
Thermal diode, located on processor die
C
Ambient temperature sensor, internal to hardware monitoring and fan control ASIC
D
Processor fan
E
Rear chassis fan
F
Front chassis fan
Figure 10. Location of Thermal Sensors and Fan Connectors
28
Product Description
1.10.3
Fan Monitoring
Fan monitoring can be implemented using Intel® Desktop Utilities or third-party software. The
level of monitoring and control is dependent on the hardware monitoring ASIC used with the
Desktop Board.
For information about
Refer to
The functions of the fan connectors
Section 1.11.2.2, page 33
1.10.4
Chassis Intrusion and Detection
The board supports a chassis security feature that detects if the chassis cover is removed. The
security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion
connector. When the chassis cover is removed, the mechanical switch is in the closed position.
For information about
Refer to
The location of the chassis intrusion connector
Figure 13, page 44
The signal names of the chassis intrusion connector
Table 18, page 46
1.11 Power Management
Power management is implemented at several levels, including:
•
•
1.11.1
Software support through Advanced Configuration and Power Interface (ACPI)
Hardware support:
⎯ Power connector
⎯ Fan connectors
⎯ LAN wake capabilities
⎯ Instantly Available PC technology
⎯ Resume on Ring
⎯ Wake from USB
⎯ Wake from PS/2 devices
⎯ Power Management Event signal (PME#) wake-up support
ACPI
ACPI gives the operating system direct control over the power management and Plug and Play
functions of a computer. The use of ACPI with this board requires an operating system that
provides full ACPI support. ACPI features include:
•
•
•
•
•
•
Plug and Play (including bus and device enumeration)
Power management control of individual devices, add-in boards (some add-in boards may
require an ACPI-aware driver), video displays, and hard disk drives
Methods for achieving less than 15-watt system operation in the power-on/standby
sleeping state
A Soft-off feature that enables the operating system to power-off the computer
Support for multiple wake-up events (see Table 8 on page 32)
Support for a front panel power and sleep mode switch
29
Intel Desktop Board D915PLWD Technical Product Specification
Table 6 lists the system states based on how long the power switch is pressed, depending on how
ACPI is configured with an ACPI-aware operating system.
Table 6.
Effects of Pressing the Power Switch
If the system is in this state…
Off
(ACPI G2/G5 – Soft off)
On
(ACPI G0 – working state)
On
(ACPI G0 – working state)
Sleep
(ACPI G1 – sleeping state)
Sleep
(ACPI G1 – sleeping state)
1.11.1.1
…and the power switch is
pressed for
Less than four seconds
Less than four seconds
More than four seconds
Less than four seconds
More than four seconds
…the system enters this state
Power-on
(ACPI G0 – working state)
Soft-off/Standby
(ACPI G1 – sleeping state)
Fail safe power-off
(ACPI G2/G5 – Soft off)
Wake-up
(ACPI G0 – working state)
Power-off
(ACPI G2/G5 – Soft off)
System States and Power States
Under ACPI, the operating system directs all system and device power state transitions. The
operating system puts devices in and out of low-power states based on user preferences and
knowledge of how devices are being used by applications. Devices that are not being used can be
turned off. The operating system uses information from applications and user settings to put the
system as a whole into a low-power state.
Table 7 lists the power states supported by the board along with the associated system power
targets. See the ACPI specification for a complete description of the various system and power
states.
30
Product Description
Table 7.
Power States and Targeted System Power
Global States
G0 – working
state
G1 – sleeping
state
Sleeping States
S0 – working
Processor
States
C0 – working
S1 – Processor
stopped
C1 – stop
grant
G1 – sleeping
state
S3 – Suspend to
RAM. Context
saved to RAM.
S4 – Suspend to
disk. Context
saved to disk.
S5 – Soft off.
Context not saved.
Cold boot is
required.
No power to the
system.
No power
G1 – sleeping
state
G2/S5
G3 –
mechanical off
AC power is
disconnected
from the
computer.
No power
No power
No power
Device States
D0 – working state.
Targeted System
Power (Note 1)
Full power > 30 W
D1, D2, D3 – device
specification
specific.
D3 – no power
except for wake-up
logic.
D3 – no power
except for wake-up
logic.
D3 – no power
except for wake-up
logic.
5 W < power < 52.5 W
D3 – no power for
wake-up logic,
except when
provided by battery
or external source.
No power to the system.
Service can be
performed safely.
Power < 5 W
(Note 2)
Power < 5 W
(Note 2)
Power < 5 W
(Note 2)
Notes:
1.
Total system power is dependent on the system configuration, including add-in boards and peripherals powered
by the system chassis’ power supply.
2.
Dependent on the standby power consumption of wake-up devices used in the system.
1.11.1.2
One-Watt Standby
In 2001, the U.S. government issued an executive order requiring a reduction in power for
appliances and personal computers. This board meets that requirement by operating at 1 W (or
less) in S5 (Standby) mode. One-Watt operation applies only to the S5 state when the computer is
turned off, but still connected to AC power. One-Watt operation does not apply to the S3 (Suspend
to RAM) or S4 (Suspend to disk) states.
Newer energy-efficient power supplies using less than 0.5 W (in Standby mode) may also be
needed to achieve this goal.
31
Intel Desktop Board D915PLWD Technical Product Specification
1.11.1.3
Wake-up Devices and Events
Table 8 lists the devices or specific events that can wake the computer from specific states.
Table 8.
Wake-up Devices and Events
These devices/events can wake up the computer…
…from this state
LAN
S1, S3, S4, S5 (Note)
Modem (back panel Serial Port A)
S1, S3
PME# signal
S1, S3, S4, S5 (Note)
Power switch
S1, S3, S4, S5
PS/2 devices
S1, S3
RTC alarm
S1, S3, S4, S5
USB
S1, S3
WAKE# signal
S1, S3, S4, S5
Note:
For LAN and PME# signal, S5 is disabled by default in the BIOS Setup program. Setting this option to Power On
will enable a wake-up event from LAN in the S5 state.
NOTE
The use of these wake-up events from an ACPI state requires an operating system that provides full
ACPI support. In addition, software, drivers, and peripherals must fully support ACPI wake
events.
1.11.2
Hardware Support
CAUTION
Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities and
Instantly Available PC technology features are used. Failure to do so can damage the power
supply. The total amount of standby current required depends on the wake devices supported and
manufacturing options.
The board provides several power management hardware features, including:
•
•
•
•
•
•
•
•
•
Power connector
Fan connectors
LAN wake capabilities
Instantly Available PC technology
Resume on Ring
Wake from USB
Wake from PS/2 keyboard
PME# signal wake-up support
WAKE# signal wake-up support
LAN wake capabilities and Instantly Available PC technology require power from the +5 V
standby line.
32
Product Description
Resume on Ring enables telephony devices to access the computer when it is in a power-managed
state. The method used depends on the type of telephony device (external or internal).
NOTE
The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an
operating system that provides full ACPI support.
1.11.2.1
Power Connector
ATX12V-compliant power supplies can turn off the system power through system control. When
an ACPI-enabled system receives the correct command, the power supply removes all non-standby
voltages.
When resuming from an AC power failure, the computer returns to the power state it was in before
power was interrupted (on or off). The computer’s response can be set using the Last Power State
feature in the BIOS Setup program’s Boot menu.
For information about
Refer to
The location of the main power connector
Figure 13, page 44
The signal names of the main power connector
Table 22, page 47
1.11.2.2
Fan Connectors
The function/operation of the fan connectors is as follows:
•
•
•
•
•
The fans are on when the board is in the S0 or S1 state.
The fans are off when the board is off or in the S3, S4, or S5 state.
Each fan connector is wired to a fan tachometer input of the hardware monitoring and fan
control ASIC.
All fan connectors support closed-loop fan control that can adjust the fan speed or switch the
fan on or off as needed.
All fan connectors have a +12 V DC connection.
For information about
Refer to
The location of the fan connectors and sensors for thermal monitoring
Figure 10, page 28
The signal names of the processor fan connector
Table 20, page 46
The signal names of the chassis fan connectors
Table 21, page 46
1.11.2.3
LAN Wake Capabilities
CAUTION
For LAN wake capabilities, the +5 V standby line for the power supply must be capable of
providing adequate +5 V standby current. Failure to provide adequate standby current when
implementing LAN wake capabilities can damage the power supply.
LAN wake capabilities enable remote wake-up of the computer through a network. The LAN
network adapter monitors network traffic at the Media Independent Interface. Upon detecting a
33
Intel Desktop Board D915PLWD Technical Product Specification
Magic Packet* frame, the LAN subsystem asserts a wake-up signal that powers up the computer.
Depending on the LAN implementation, the board supports LAN wake capabilities with ACPI in
the following ways:
•
•
•
1.11.2.4
The PCI Express WAKE# signal
The PCI Conventional bus PME# signal for PCI 2.2 compliant LAN designs
The onboard LAN subsystem
Instantly Available PC Technology
CAUTION
For Instantly Available PC technology, the +5 V standby line for the power supply must be capable
of providing adequate +5 V standby current. Failure to provide adequate standby current when
implementing Instantly Available PC technology can damage the power supply.
Instantly Available PC technology enables the board to enter the ACPI S3 (Suspend-to-RAM)
sleep-state. While in the S3 sleep-state, the computer will appear to be off (the power supply is off,
and the front panel LED is amber if dual colored, or off if single colored.) When signaled by a
wake-up device or event, the system quickly returns to its last known wake state. Table 8 on
page 32 lists the devices and events that can wake the computer from the S3 state.
The board supports the PCI Bus Power Management Interface Specification. Add-in boards that
also support this specification can participate in power management and can be used to wake the
computer.
The use of Instantly Available PC technology requires operating system support and PCI 2.2
compliant add-in cards, PCI Express add-in cards, and drivers.
1.11.2.5
Resume on Ring
The operation of Resume on Ring can be summarized as follows:
•
•
•
1.11.2.6
Resumes operation from ACPI S1 or S3 states
Detects incoming call similarly for external and internal modems
Requires modem interrupt be unmasked for correct operation
Wake from USB
USB bus activity wakes the computer from ACPI S1 or S3 states.
NOTE
Wake from USB requires the use of a USB peripheral that supports Wake from USB.
1.11.2.7
Wake from PS/2 Devices
PS/2 device activity wakes the computer from an ACPI S1 or S3 state.
34
Product Description
1.11.2.8
PME# Signal Wake-up Support
When the PME# signal on the PCI Conventional bus is asserted, the computer wakes from an ACPI
S1, S3, S4, or S5 state (with Wake on PME enabled in BIOS).
1.11.2.9
WAKE# Signal Wake-up Support
When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from an ACPI
S1, S3, S4, or S5 state.
1.11.2.10
+5 V Standby Power Indicator LED
The +5 V standby power indicator LED shows that power is still present even when the computer
appears to be off. Figure 11 shows the location of the standby power indicator LED.
CAUTION
If AC power has been switched off and the standby power indicator is still lit, disconnect the power
cord before installing or removing any devices connected to the board. Failure to do so could
damage the board and any attached devices.
CR3J1
OM17978
Figure 11. Location of the Standby Power Indicator LED
35
Intel Desktop Board D915PLWD Technical Product Specification
36
2 Technical Reference
What This Chapter Contains
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
2.13
2.14
Memory Map ................................................................................................................ 37
DMA Channels ............................................................................................................. 38
Fixed I/O Map............................................................................................................... 39
PCI Configuration Space Map...................................................................................... 40
Interrupts ...................................................................................................................... 41
PCI Conventional Interrupt Routing Map ..................................................................... 42
Connectors................................................................................................................... 43
Jumper Block ............................................................................................................... 52
Mechanical Considerations .......................................................................................... 53
Electrical Considerations.............................................................................................. 55
Thermal Considerations ............................................................................................... 57
Reliability...................................................................................................................... 59
Environmental .............................................................................................................. 60
Regulatory Compliance................................................................................................ 61
2.1 Memory Map
Table 9 lists the system memory map.
Table 9.
System Memory Map
Address Range (decimal)
Address Range (hex)
Size
Description
1024 K - 2097152 K
100000 - 7FFFFFFF
2047 MB
Extended memory
960 K - 1024 K
F0000 - FFFFF
64 KB
Runtime BIOS
896 K - 960 K
E0000 - EFFFF
64 KB
Reserved
800 K - 896 K
C8000 - DFFFF
96 KB
Potential available high DOS
memory (open to the PCI
Conventional bus). Dependent on
video adapter used.
640 K - 800 K
A0000 - C7FFF
160 KB
Video memory and BIOS
639 K - 640 K
9FC00 - 9FFFF
1 KB
Extended BIOS data (movable by
memory manager software)
512 K - 639 K
80000 - 9FBFF
127 KB
Extended conventional memory
0 K - 512 K
00000 - 7FFFF
512 KB
Conventional memory
37
Intel Desktop Board D915PLWD Technical Product Specification
2.2 DMA Channels
Table 10.
38
DMA Channels
DMA Channel Number
Data Width
System Resource
0
8 or 16 bits
Open
1
8 or 16 bits
Parallel port
2
8 or 16 bits
Diskette drive
3
8 or 16 bits
Parallel port (for ECP or EPP)
4
8 or 16 bits
DMA controller
5
16 bits
Open
6
16 bits
Open
7
16 bits
Open
Technical Reference
2.3 Fixed I/O Map
Table 11.
I/O Map
Address (hex)
Size
Description
0000 - 00FF
256 bytes
Used by the Desktop Board D915PLWD. Refer to the ICH6
data sheet for dynamic addressing information.
0170 - 0177
8 bytes
Secondary Parallel ATA IDE channel command block
01F0 - 01F7
8 bytes
Primary Parallel ATA IDE channel command block
0228 - 022F (Note 1)
8 bytes
LPT3
0278 - 027F (Note 1)
8 bytes
LPT2
02E8 - 02EF (Note 1)
8 bytes
COM4
02F8 - 02FF (Note 1)
8 bytes
COM2
0374 - 0377
4 bytes
Secondary Parallel ATA IDE channel control block
0377, bits 6:0
7 bits
Secondary IDE channel status port
0378 - 037F
8 bytes
LPT1
03E8 - 03EF
8 bytes
COM3
03F0 - 03F5
6 bytes
Diskette channel
03F4 – 03F7
1 byte
Primary Parallel ATA IDE channel control block
03F8 - 03FF
8 bytes
COM1
04D0 - 04D1
2 bytes
Edge/level triggered PIC
LPTn + 400
8 bytes
ECP port, LPTn base address + 400h
0CF8 - 0CFB (Note 2)
4 bytes
PCI Conventional bus configuration address register
0CF9 (Note 3)
1 byte
Reset control register
0CFC - 0CFF
4 bytes
PCI Conventional bus configuration data register
FFA0 - FFA7
8 bytes
Primary Parallel ATA IDE bus master registers
FFA8 - FFAF
8 bytes
Secondary Parallel ATA IDE bus master registers
Notes:
1.
Default, but can be changed to another address range
2.
Dword access only
3.
Byte access only
NOTE
Some additional I/O addresses are not available due to ICH6 address aliasing. The ICH6 data
sheet provides more information on address aliasing.
For information about
Refer to
Obtaining the ICH6 data sheet
Section 1.2, page 15
39
Intel Desktop Board D915PLWD Technical Product Specification
2.4 PCI Configuration Space Map
Table 12.
PCI Configuration Space Map
Bus
Number (hex)
Device
Number (hex)
Function
Number (hex)
Description
00
00
00
Memory controller of Intel 82915PL component
00
01
00
PCI Express x16 graphics port (Note 1)
00
1B
00
Intel High Definition Audio Controller
00
1C
00
PCI Express port 1
00
1C
01
PCI Express port 2
00
1C
02
PCI Express port 3
00
1C
03
PCI Express port 4
00
1D
00
USB UHCI controller 1
00
1D
01
USB UHCI controller 2
00
1D
02
USB UHCI controller 3
00
1D
03
USB UHCI controller 4
00
1D
07
EHCI controller
00
1E
00
PCI bridge
00
1F
00
PCI controller
00
1F
01
Parallel ATA IDE controller
00
1F
02
Serial ATA controller
00
1F
03
SMBus controller
(Note 2)
00
00
PCI Conventional bus connector 1
(Note 2)
01
00
PCI Conventional bus connector 2
(Note 2)
02
00
PCI Conventional bus connector 3
(Note 2)
03
00
PCI Conventional bus connector 4
(Note 2)
08
00
Intel 82562GZ 10/100 Mbits/sec LAN PLC
01
00
00
PCI Express video controller (if present) (Note 1)
Notes:
40
1.
Present only when a PCI Express x16 graphics card is installed.
2.
Bus number is dynamic and can change based on add-in cards used.
Technical Reference
2.5 Interrupts
The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the
Advanced Programmable Interrupt Controller (APIC) portion of the ICH6 component. The PIC is
supported in Windows 98 SE and Windows ME and uses the first 16 interrupts. The APIC is
supported in Windows 2000 and Windows XP and supports a total of 24 interrupts.
Table 13.
Interrupts
IRQ
System Resource
NMI
I/O channel check
0
Reserved, interval timer
1
Reserved, keyboard buffer full
2
Reserved, cascade interrupt from slave PIC
3
COM2 (Note 1)
4
COM1 (Note 1)
5
LPT2 (Plug and Play option)/User available
6
Diskette drive
7
LPT1 (Note 1)
8
Real-time clock
9
User available
10
User available
11
User available
12
Onboard mouse port (if present, else user available)
13
Reserved, math coprocessor
14
Primary IDE/Serial ATA (if present, else user available)
15
Secondary IDE/Serial ATA (if present, else user available)
16 (Note 2)
User available (through PIRQA)
17 (Note 2)
User available (through PIRQB)
18
(Note 2)
User available (through PIRQC)
19
(Note 2)
User available (through PIRQD)
20 (Note 2)
User available (through PIRQE)
21
(Note 2)
User available (through PIRQF)
22
(Note 2)
User available (through PIRQG)
23 (Note 2)
User available (through PIRQH)
Notes:
1.
Default, but can be changed to another IRQ.
2.
Available in APIC mode only.
41
Intel Desktop Board D915PLWD Technical Product Specification
2.6 PCI Conventional* Interrupt Routing Map
This section describes interrupt sharing and how the interrupt signals are connected between the
PCI Conventional bus connectors and onboard PCI Conventional devices. The PCI Conventional
specification describes how interrupts can be shared between devices attached to the PCI
Conventional bus. In most cases, the small amount of latency added by interrupt sharing does not
affect the operation or throughput of the devices. In some special cases where maximum
performance is needed from a device, a PCI Conventional device should not share an interrupt with
other PCI Conventional devices. Use the following information to avoid sharing an interrupt with a
PCI Conventional add-in card.
PCI Conventional devices are categorized as follows to specify their interrupt grouping:
•
•
•
INTA: By default, all add-in cards that require only one interrupt are in this category. For
almost all cards that require more than one interrupt, the first interrupt on the card is also
classified as INTA.
INTB: Generally, the second interrupt on add-in cards that require two or more interrupts is
classified as INTB. (This is not an absolute requirement.)
INTC and INTD: Generally, a third interrupt on add-in cards is classified as INTC and a fourth
interrupt is classified as INTD.
The ICH6 has eight Programmable Interrupt Request (PIRQ) input signals. All PCI Conventional
interrupt sources either onboard or from a PCI Conventional add-in card connect to one of these
PIRQ signals. Some PCI Conventional interrupt sources are electrically tied together on the board
and therefore share the same interrupt. Table 14 shows an example of how the PIRQ signals are
routed.
Table 14.
PCI Interrupt Routing Map
ICH6 PIRQ Signal Name
PCI Interrupt Source
PIRQA
PIRQB
PIRQC
PIRQD
PIRQE
PIRQF
PIRQG
PIRQH
INTD
INTA
INTB
INTC
INTC
INTB
INTA
INTD
INTC
INTD
ICH6 LAN
INTA
PCI bus connector 1
PCI bus connector 2
PCI bus connector 3
PCI bus connector 4
INTD
INTC
INTA
INTB
INTB
INTA
NOTE
In PIC mode, the ICH6 can connect each PIRQ line internally to one of the IRQ signals (3, 4, 5, 6,
7, 9, 10, 11, 12, 14, and 15). Typically, a device that does not share a PIRQ line will have a unique
interrupt. However, in certain interrupt-constrained situations, it is possible for two or more of the
PIRQ lines to be connected to the same IRQ signal. Refer to Table 13 for the allocation of PIRQ
lines to IRQ signals in APIC mode.
PCI interrupt assignments to the USB ports, Serial ATA ports, and PCI Express ports are dynamic.
42
Technical Reference
2.7 Connectors
CAUTION
Only the following connectors have overcurrent protection: back panel USB, front panel USB, and
PS/2. The other internal connectors are not overcurrent protected and should connect only to
devices inside the computer’s chassis, such as fans and internal peripherals. Do not use these
connectors to power devices external to the computer’s chassis. A fault in the load presented by the
external devices could cause damage to the computer, the power cable, and the external devices
themselves.
This section describes the board’s connectors. The connectors can be divided into these groups:
•
•
2.7.1
Back panel I/O connectors
Component-side I/O connectors (see page 44)
Back Panel Connectors
Figure 12 shows the location of the back panel connectors. The back panel connectors are
color-coded. The figure legend (Table 15) lists the colors used (when applicable).
A
B
C
D
I
E
F
G
H
OM17979
Figure 12. Back Panel Connectors
Table 15.
Back Panel Connectors Shown in Figure 12
Item/callout from Figure 12
A
B
C
D
E
F
G
H
I
Description
PS/2 mouse port (Green)
PS/2 keyboard port (Purple)
Parallel port (Burgundy)
Serial port A (Teal)
Audio line in/Retasking Port C (Light blue)
Audio line out/Retasking Port D (Lime Green)
Mic in/Retasking Port B (Pink)
USB ports (four)
LAN
NOTE
The back panel audio line out connector is designed to power headphones or amplified speakers
only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output.
43
Intel Desktop Board D915PLWD Technical Product Specification
2.7.2
Component-side Connectors
Figure 13 shows the locations of the component-side connectors.
A
B
D E F
C
1
2
9
10
G
H
I
J
1
3
3
4
3
1
2
1
1
1
1
1
10
9
2
1
3
1
1
4
1
1
2
10
1
24
2
23
40 2
2
1
34
1
33
39 1
X
U
W
V
S
T
Q
R
O
N
M
L K
P
OM17980
Figure 13. Component-side Connectors
44
Technical Reference
Table 16 lists the component-side connectors identified in Figure 13.
Table 16.
Component-side Connectors Shown in Figure 13
Item/callout
from Figure 13
Description
A
PCI Conventional bus add-in card connector 4
B
PCI Conventional bus add-in card connector 3
C
PCI Express x1 bus add-in card connector
D
PCI Express x1 bus add-in card connector
E
Front panel audio connector
F
PCI Conventional bus add-in card connector 2
G
PCI Conventional bus add-in card connector 1
H
PCI Express x16 bus add-in card connector
I
Rear chassis fan connector
J
+12V power connector (ATX12V)
K
Processor fan connector
L
Power connector
M
Diskette drive connector
N
Parallel ATA IDE connector
O
Chassis intrusion connector
P
Front chassis fan connector
Q
Serial ATA connector 1
R
Serial ATA connector 3
S
Serial ATA connector 2
T
Serial ATA connector 0
U
Auxiliary front panel power LED connector
V
Front panel connector
W
Front panel USB connector
X
Front panel USB connector
45
Intel Desktop Board D915PLWD Technical Product Specification
Table 17.
#
Front Panel Audio Connector
Pin
Signal Name
Pin
Signal Name
1
Port E [Port 1] Left Channel
2
Ground
3
Port E [Port 1] Right Channel
4
Presence# (dongle present)
5
Port F [Port 2] Right Channel
6
Port E [Port 1] Sense return
(jack detection)
7
Port E [Port 1] and Port F [Port 2]
Sense send (jack detection)
8
Key
9
Port F [Port 2] Left Channel
10
Port F [Port 2] Sense return
(jack detection)
INTEGRATOR’S NOTE
The front panel audio connector is colored yellow.
Table 18.
Pin
Signal Name
1
Intruder
2
Ground
Table 19.
Serial ATA Connectors
Pin
Signal Name
1
Ground
2
TXP
3
TXN
4
Ground
5
RXN
6
RXP
7
Ground
Table 20.
Processor Fan Connector
Pin
Signal Name
1
Ground
2
+12 V
3
FAN_TACH
4
FAN_CONTROL
Table 21.
46
Chassis Intrusion Connector
Chassis Fan Connectors
Pin
Signal Name
1
FAN_CONTROL
2
+12 V
3
FAN_TACH
Technical Reference
2.7.2.1
Power Supply Connectors
The board has three power supply connectors:
•
•
Main power – a 2 x 12 connector. This connector is compatible with 2 x 10 connectors
previously used on Intel desktop boards. The board supports the use of ATX12V power
supplies with either 2 x 10 or 2 x 12 main power cables. When using a power supply with a
2 x 10 main power cable, attach that cable on the rightmost pins of the main power connector,
leaving pins 11, 12, 23, and 24 unconnected.
ATX12V power – a 2 x 2 connector. This connector provides power directly to the processor
voltage regulator and must always be used. Failure to do so will prevent the board from
booting.
Table 22.
Main Power Connector
Pin
Signal Name
Pin
Signal Name
1
2
+3.3 V
13
+3.3 V
+3.3 V
14
-12 V
3
Ground
15
Ground
4
+5 V
16
PS-ON# (power supply remote on/off)
5
Ground
17
Ground
6
+5 V
18
Ground
7
Ground
19
Ground
8
PWRGD (Power Good)
20
No connect
9
+5 V (Standby)
21
+5 V
10
+12 V
22
+5 V
11
+12 V
23
+5 V
24
Ground
12
(Note)
2 x 12 connector detect
(Note)
(Note)
(Note)
Note: When using a 2 x 10 power supply cable, this pin will be unconnected.
Table 23.
ATX12V Power Connector
Pin
Signal Name
Pin
Signal Name
1
Ground
2
Ground
3
+12 V
4
+12 V
47
Intel Desktop Board D915PLWD Technical Product Specification
2.7.2.2
Add-in Card Connectors
The board has the following add-in card connectors:
•
•
•
PCI Express x16: one connector supporting simultaneous transfer speeds up to 8 GBytes/sec.
PCI Express x1: two PCI Express x1 connectors. The x1 interfaces support simultaneous
transfer speeds up to 500 MBytes/sec.
PCI Conventional (rev 2.3 compliant) bus: four PCI Conventional bus add-in card connectors.
The SMBus is routed to PCI Conventional bus connector 2 only (ATX expansion slot 6). PCI
Conventional bus add-in cards with SMBus support can access sensor data and other
information residing on the board.
Note the following considerations for the PCI Conventional bus connectors:
•
•
All of the PCI Conventional bus connectors are bus master capable.
SMBus signals are routed to PCI Conventional bus connector 2. This enables PCI
Conventional bus add-in boards with SMBus support to access sensor data on the boards. The
specific SMBus signals are as follows:
⎯ The SMBus clock line is connected to pin A40.
⎯ The SMBus data line is connected to pin A41.
2.7.2.3
Auxiliary Front Panel Power/Sleep LED Connector
Pins 1 and 3 of this connector duplicate the signals on pins 2 and 4 of the front panel connector.
Table 24.
Pin
48
Auxiliary Front Panel Power/Sleep LED Connector
Signal Name
In/Out
Description
1
HDR_BLNK_GRN
Out
Front panel green LED
2
Not connected
3
HDR_BLNK_YEL
Out
Front panel yellow LED
Technical Reference
2.7.2.4
Front Panel Connector
This section describes the functions of the front panel connector. Table 25 lists the signal names of
the front panel connector. Figure 14 is a connection diagram for the front panel connector.
Table 25.
Pin
Front Panel Connector
Signal
In/Out
Description
Pin
Signal
In/Out
Hard Drive Activity LED
[Yellow]
Description
Power LED
[Green]
1
HD_PWR
Out
Hard disk LED pull-up
(750 Ω) to +5 V
2
HDR_BLNK_
GRN
Out
Front panel green
LED
3
HAD#
Out
Hard disk active LED
4
HDR_BLNK_
YEL
Out
Front panel yellow
LED
Reset Switch
[Purple]
5
Ground
7
FP_RESET#
In
On/Off Switch
[Red]
Ground
6
FPBUT_IN
Reset switch
8
Ground
Not Connected
Power
10
N/C
Dual-colored
Power LED
Single-colored
Power LED
+
−
−
+
Not connected
+5 V DC
8
7
6
5
4
3
2
1
Purple
Red
9
Green
Power
Switch
N/C
Yellow
+5 V
Power switch
Ground
Power
9
In
Reset
Switch
−
+
Hard Drive
Activity LED
OM17000
Figure 14. Connection Diagram for Front Panel Connector
2.7.2.4.1
Hard Drive Activity LED Connector [Yellow]
Pins 1 and 3 [Yellow] can be connected to an LED to provide a visual indicator that data is being
read from or written to a hard drive. Proper LED function requires one of the following:
•
•
A Serial ATA hard drive connected to an onboard Serial ATA connector
An IDE hard drive connected to an onboard IDE connector
49
Intel Desktop Board D915PLWD Technical Product Specification
2.7.2.4.2
Reset Switch Connector [Purple]
Pins 5 and 7 [Purple] can be connected to a momentary single pole, single throw (SPST) type
switch that is normally open. When the switch is closed, the board resets and runs the POST.
2.7.2.4.3
Power/Sleep LED Connector [Green]
Pins 2 and 4 [Green] can be connected to a one- or two-color LED. Table 26 shows the possible
states for a one-color LED. Table 27 shows the possible states for a two-color LED.
Table 26.
States for a One-Color Power LED
LED State
Description
Off
Power off/sleeping
Steady Green
Running
Table 27.
States for a Two-Color Power LED
LED State
Description
Off
Power off
Steady Green
Running
Steady Yellow
Sleeping
NOTE
The colors listed in Table 26 and Table 27 are suggested colors only. Actual LED colors are
product- or customer-specific.
2.7.2.4.4
Power Switch Connector [Red]
Pins 6 and 8 [Red] can be connected to a front panel momentary-contact power switch. The switch
must pull the SW_ON# pin to ground for at least 50 ms to signal the power supply to switch on or
off. (The time requirement is due to internal debounce circuitry on the board.) At least two
seconds must pass before the power supply will recognize another on/off signal.
50
Technical Reference
2.7.3
Front Panel USB Connectors
Figure 15 is a connection diagram for the front panel USB connectors.
#
INTEGRATOR’S NOTES
•
•
•
•
The +5 V DC power on the USB connector is fused.
Pins 1, 3, 5, and 7 comprise one USB port.
Pins 2, 4, 6, and 8 comprise one USB port.
Use only a front panel USB connector that conforms to the USB 2.0 specification for highspeed USB devices.
One
USB
Port
Power
(+5 V DC)
1
2
Power
(+5 V DC)
D−
3
4
D−
D+
5
6
D+
Ground
7
8
Ground
10
No Connect
Key (no pin)
One
USB
Port
OM15963
Figure 15. Connection Diagram for Front Panel USB Connectors
51
Intel Desktop Board D915PLWD Technical Product Specification
2.8 Jumper Block
CAUTION
Do not move the jumper with the power on. Always turn off the power and unplug the power cord
from the computer before changing a jumper setting. Otherwise, the board could be damaged.
Figure 16 shows the location of the jumper block. The jumper block determines the BIOS Setup
program’s mode. Table 28 describes the jumper settings for the three modes: normal, configure, and
recovery. When the jumper is set to configure mode and the computer is powered-up, the BIOS
compares the processor version and the microcode version in the BIOS and reports if the two match.
1
3
J8J4
OM17981
Figure 16. Location of the Jumper Block
Table 28.
52
BIOS Setup Configuration Jumper Settings
Function/Mode
Jumper Setting
Configuration
Normal
1-2
1
3
The BIOS uses current configuration information and
passwords for booting.
Configure
2-3
1
3
After the POST runs, Setup runs automatically. The
maintenance menu is displayed.
Recovery
None
1
3
The BIOS attempts to recover the BIOS configuration. A
recovery diskette is required.
Technical Reference
2.9 Mechanical Considerations
2.9.1
Form Factor
The board is designed to fit into an ATX-form-factor chassis. Figure 17 illustrates the mechanical
form factor of the board. Dimensions are given in inches [millimeters]. The outer dimensions are
12.00 inches by 9.60 inches [304.80 millimeters by 243.84 millimeters]. Location of the I/O
connectors and mounting holes are in compliance with the ATX specification.
1.800
[45.72]
6.500
[165.10]
6.100
[154.94]
5.200
[132.08]
0.00
2.850
[72.39]
3.100
[78.74]
5.550
[140.97]
4.900
[124.46]
2.600
[66.04]
0.00
6.200
[157.48]
6.450
[163.83]
OM17982
Figure 17. Board Dimensions
53
Intel Desktop Board D915PLWD Technical Product Specification
2.9.2
I/O Shield
The back panel I/O shield for the board must meet specific dimension and material requirements.
Systems based on this board need the back panel I/O shield to pass certification testing.
Figure 18 shows the I/O shield. Dimensions are given in inches to a tolerance of ±0.02 inches.
The figure also indicates the position of each cutout. Additional design considerations for I/O
shields relative to chassis requirements are described in the ATX specification.
NOTE
The I/O shield drawing in this document is for reference only. An I/O shield compliant with the
ATX chassis specification 2.03 is available from Intel.
162.3 REF
[6.390]
1.6 ± 0.12
[0.063 ± 0.005]
20. ± 0.254 TYP
[0.787 ± 0.10]
159.2 ± 0.12
[6.268 ± 0.005]
1.55 REF
[0.061]
22.45
[0.884]
7.012
[0.276]
Ø 1.00
[0.039]
8x R 0.5 MIN
A
A
0.00
[0.00]
11.81
[0.465]
11.811
[0.465]
14.4
[0.567]
142.12
[5.595]
120.81
[4.756]
102.84
[4.049]
21.13
[0.832]
27.876
[1.097]
0.00
[0.00]
9.44
[0.372]
12.00
[0.472]
Pictorial
View
OM17983
Figure 18. I/O Shield Dimensions
54
Technical Reference
2.10 Electrical Considerations
2.10.1
DC Loading
Table 29 lists the DC loading characteristics of the board. This data is based on a DC analysis of
all active components within the board that impact its power delivery subsystems. The analysis
does not include PCI add-in cards. Minimum values assume a light load placed on the board that is
similar to an environment with no applications running and no USB current draw. Maximum
values assume a load placed on the board that is similar to a heavy gaming environment with a
500 mA current draw per USB port. These calculations are not based on specific processor values
or memory configurations but are based on the minimum and maximum current draw possible from
the board’s power delivery subsystems to the processor, memory, and USB ports.
Use the datasheets for add-in cards, such as PCI, to determine the overall system power
requirements. The selection of a power supply at the system level is dependent on the system’s
usage model and not necessarily tied to a particular processor speed.
Table 29.
DC Loading Characteristics
DC Current at:
Mode
DC Power
+3.3 V
+5 V
+12 V
-12 V
+5 VSB
Minimum loading
200.00 W
3.30 A
10.00 A
900 A
0.03 A
0.80 A
Maximum loading
300.00 W
6.00 A
14.00 A
16.00 A
0.10 A
1.40 A
2.10.2
Add-in Board Considerations
The board is designed to provide 2 A (average) of +5 V current for each add-in board. The total
+5 V current draw for the board is as follows: a fully loaded D915PLWD board (all six expansion
slots filled and the PCI Express x16 filled) must not exceed 14 A.
55
Intel Desktop Board D915PLWD Technical Product Specification
2.10.3
Fan Connector Current Capability
CAUTION
The processor fan must be connected to the processor fan connector, not to a chassis fan
connector. Connecting the processor fan to a chassis fan connector may result in onboard
component damage that will halt fan operation.
Table 30 lists the current capability of the fan connectors.
Table 30.
Fan Connector Current Capability
Fan Connector
Maximum Available Current
Processor fan
1000 mA
Front chassis fan
600 mA
Rear chassis fan
600 mA
2.10.4
Power Supply Considerations
CAUTION
The +5 V standby line for the power supply must be capable of providing adequate +5 V standby
current. Failure to do so can damage the power supply. The total amount of standby current
required depends on the wake devices supported and manufacturing options.
System integrators should refer to the power usage values listed in Table 29 when selecting a power
supply for use with the board.
Additional power required will depend on configurations chosen by the integrator.
The power supply must comply with the following recommendations found in the indicated
sections of the ATX form factor specification.
• The potential relation between 3.3 VDC and +5 VDC power rails (Section 4.2)
• The current capability of the +5 VSB line (Section 4.2.1.2)
• All timing parameters (Section 4.2.1.3)
• All voltage tolerances (Section 4.2.2)
56
Technical Reference
2.11 Thermal Considerations
CAUTION
A chassis with a maximum internal ambient temperature of 38 oC at the processor fan inlet is a
requirement. Use a processor heatsink that provides omni-directional airflow (similar to the type
shown in Figure 19) to maintain required airflow across the processor voltage regulator area.
OM16996
Figure 19. Processor Heatsink for Omni-directional Airflow
CAUTION
Failure to ensure appropriate airflow may result in reduced performance of both the processor
and/or voltage regulator or, in some instances, damage to the board. For a list of chassis that have
been tested with Intel desktop boards please refer to the following website:
http://developer.intel.com/design/motherbd/cooling.htm
All responsibility for determining the adequacy of any thermal or system design remains solely with
the reader. Intel makes no warranties or representations that merely following the instructions
presented in this document will result in a system with adequate thermal performance.
CAUTION
Ensure that the ambient temperature does not exceed the board’s maximum operating temperature.
Failure to do so could cause components to exceed their maximum case temperature and
malfunction. For information about the maximum operating temperature, see the environmental
specifications in Section 2.13.
57
Intel Desktop Board D915PLWD Technical Product Specification
CAUTION
Ensure that proper airflow is maintained in the processor voltage regulator circuit. Failure to do
so may result in damage to the voltage regulator circuit. The processor voltage regulator area
(item A in Figure 20) can reach a temperature of up to 85 oC in an open chassis.
Figure 20 shows the locations of the localized high temperature zones.
A
B
D
C
OM17984
Item
A
B
C
D
Description
Processor voltage regulator area
Processor
Intel 82915PL MCH
Intel 82801FB ICH6
Figure 20. Localized High Temperature Zones
58
Technical Reference
Table 31 provides maximum case temperatures for the components that are sensitive to thermal
changes. The operating temperature, current load, or operating frequency could affect case
temperatures. Maximum case temperatures are important when considering proper airflow to cool
the board.
Table 31.
Thermal Considerations for Components
Component
Maximum Case Temperature
Intel Pentium 4 processor
For processor case temperature, see processor datasheets and
processor specification updates
Intel 82915PL MCH
99 oC (under bias)
Intel 82801FB ICH6
110 oC (under bias)
For information about
Intel Pentium 4 processor datasheets and specification updates
Refer to
Section 1.2, page 15
2.12 Reliability
The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates. The calculation is based on the Bellcore Reliability Prediction
Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF prediction is used to estimate
repair rates and spare parts requirements.
The MTBF data is calculated from predicted data at 55 ºC. The MTBF for the D915PLWD board
is 126,666 hours.
59
Intel Desktop Board D915PLWD Technical Product Specification
2.13 Environmental
Table 32 lists the environmental specifications for the board.
Table 32.
Environmental Specifications
Parameter
Specification
Temperature
Non-Operating
-40 °C to +70 °C
Operating
0 °C to +55 °C
Shock
Unpackaged
50 g trapezoidal waveform
Velocity change of 170 inches/second
Packaged
Half sine 2 millisecond
Product Weight (pounds)
Free Fall (inches)
Velocity Change (inches/sec)
<20
36
167
21-40
30
152
41-80
24
136
81-100
18
118
Vibration
Unpackaged
5 Hz to 20 Hz: 0.01 g² Hz sloping up to 0.02 g² Hz
Packaged
5 Hz to 40 Hz: 0.015 g² Hz (flat)
20 Hz to 500 Hz: 0.02 g² Hz (flat)
40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz
60
Technical Reference
2.14 Regulatory Compliance
This section describes the Desktop Boards’ compliance with U.S. and international safety and
electromagnetic compatibility (EMC) regulations.
2.14.1
Safety Regulations
Table 33 lists the safety regulations the Desktop Board D915PLWD complies with when correctly
installed in a compatible host system.
Table 33.
Safety Regulations
Regulation
Title
UL 60950-1:2003/
Information Technology Equipment - Safety - Part 1: General
Requirements (USA and Canada)
CSA C22.2 No. 60950-1-03
EN 60950-1:2002
Information Technology Equipment - Safety - Part 1: General
Requirements (European Union)
IEC 60950-1:2001, First Edition
Information Technology Equipment - Safety - Part 1: General
Requirements (International)
2.14.2
EMC Regulations
Table 34 lists the EMC regulations the Desktop Board D915PLWD complies with when correctly
installed in a compatible host system.
Table 34.
EMC Regulations
Regulation
Title
FCC (Class B)
Title 47 of the Code of Federal Regulations, Parts 2 and 15, Subpart B,
Radio Frequency Devices. (USA)
ICES-003 (Class B)
Interference-Causing Equipment Standard, Digital Apparatus. (Canada)
EN55022: 1998 (Class B)
Limits and methods of measurement of Radio Interference
Characteristics of Information Technology Equipment.
(European Union)
EN55024: 1998
Information Technology Equipment – Immunity Characteristics Limits
and methods of measurement. (European Union)
AS/NZS CISPR 22 (Class B)
Australian Communications Authority, Standard for Electromagnetic
Compatibility. (Australia and New Zealand)
CISPR 22, 3rd Edition (Class B)
Limits and methods of measurement of Radio Disturbance
Characteristics of Information Technology Equipment. (International)
CISPR 24: 1997
Information Technology Equipment – Immunity Characteristics – Limits
and Methods of Measurements. (International)
VCCI (Class B)
Voluntary Control for Interference by Information Technology Equipment
(Japan)
61
Intel Desktop Board D915PLWD Technical Product Specification
2.14.2.1
FCC Compliance Statement (USA)
Product Type: D915PLWD Desktop Board
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
•
•
•
•
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment to a different electrical branch circuit from that to which the receiver is
connected.
Consult the dealer or an experienced radio/TV technician for help.
Any changes or modifications to the equipment not expressly approved by Intel Corporation could
void the user’s authority to operate the equipment.
Tested to comply with FCC standards for home or office use.
2.14.2.2
Canadian Compliance Statement
This Class B digital apparatus complies with Canadian ICES-003.
Cet appereil numérique de la classe B est conforme à la norme NMB-003 du Canada.
2.14.3
European Union Declaration of Conformity Statement
We, Intel Corporation, declare under our sole responsibility that the product: Intel® Desktop Board
D915PLWD is in conformity with all applicable essential requirements necessary for CE marking,
following the provisions of the European Council Directive 89/336/EEC (EMC Directive) and
Council Directive 73/23/EEC (Safety/Low Voltage Directive).
The product is properly CE marked demonstrating this conformity and is for distribution within all
member states of the EU with no restrictions.
This product follows the provisions of the European Directives 89/336/EEC and 73/23/EEC.
Dansk Dette produkt er i overensstemmelse med det europæiske direktiv 89/336/EEC &
73/23/EEC.
62
Technical Reference
Dutch Dit product is in navolging van de bepalingen van Europees Directief 89/336/EEC &
73/23/EEC.
Suomi Tämä tuote noudattaa EU-direktiivin 89/336/EEC & 73/23/EEC määräyksiä.
Français Ce produit est conforme aux exigences de la Directive Européenne 89/336/EEC &
73/23/EEC.
Deutsch Dieses Produkt entspricht den Bestimmungen der Europäischen Richtlinie 89/336/EEC &
73/23/EEC.
Icelandic Þessi vara stenst reglugerð Evrópska Efnahags Bandalagsins númer 89/336/ EEC &
73/23/EEC.
Italiano Questo prodotto è conforme alla Direttiva Europea 89/336/EEC & 73/23/EEC.
Norsk Dette produktet er i henhold til bestemmelsene i det europeiske direktivet 89/336/ EEC &
73/23/EEC.
Portuguese Este produto cumpre com as normas da Diretiva Européia 89/336/EEC &
73/23/EEC.
Español Este producto cumple con las normas del Directivo Europeo 89/336/EEC & 73/23/EEC.
Svenska Denna produkt har tillverkats i enlighet med EG-direktiv 89/336/EEC & 73/23/EEC.
2.14.4
Product Ecology Statements
The following information is provided to address worldwide product ecology concerns and
regulations.
2.14.4.1
Disposal Considerations
This product contains the following materials that may be regulated upon disposal: lead solder on
the printed wiring board assembly.
2.14.4.2
Recycling Considerations
Intel encourages its customers to recycle its products and their components (e.g., batteries, circuit
boards, plastic enclosures, etc.) whenever possible. In the U.S., a list of recyclers in your area can
be found at:
http://www.eiae.org/
In the absence of a viable recycling option, products and their components must be disposed of in
accordance with all applicable local environmental regulations.
63
Intel Desktop Board D915PLWD Technical Product Specification
2.14.5
Product Certification Markings (Board Level)
Table 35 lists the board’s product certification markings.
Table 35.
Product Certification Markings
Description
Marking
UL joint US/Canada Recognized Component mark. Includes adjacent
UL file number for Intel Desktop Boards: E210882 (component side).
FCC Declaration of Conformity logo mark for Class B equipment;
includes Intel name and D915PLWD model designation (component
side).
CE mark. Declares compliance to European Union (EU) EMC directive
(89/336/EEC) and Low Voltage directive (73/23/EEC) (component side).
The CE mark should also be on the shipping container.
Australian Communications Authority (ACA) C-Tick mark. Includes
adjacent Intel supplier code number, N-232. The C-tick mark should
also be on the shipping container.
Printed wiring board manufacturer’s recognition mark: consists of a
unique UL recognized manufacturer’s logo, along with a flammability
rating (solder side).
64
V-0 or 94V-0
3 Overview of BIOS Features
What This Chapter Contains
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
Introduction .................................................................................................................. 65
BIOS Flash Memory Organization ............................................................................... 66
Resource Configuration ............................................................................................... 66
System Management BIOS (SMBIOS) ........................................................................ 67
Legacy USB Support.................................................................................................... 67
BIOS Updates .............................................................................................................. 68
Boot Options ................................................................................................................ 69
Adjusting Boot Speed................................................................................................... 70
BIOS Security Features ............................................................................................... 71
3.1 Introduction
The board uses an Intel® 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 autoconfiguration utility, and Plug and Play support.
The BIOS displays a message during POST identifying the type of BIOS and a revision code. The
initial production BIOSs are identified as VG91510A.86A.
When the BIOS Setup configuration jumper is set to configure mode and the computer is poweredup, the BIOS compares the CPU version and the microcode version in the BIOS and reports if the
two match.
The BIOS Setup program can be used to view and change the BIOS settings for the computer. The
BIOS Setup program is accessed by pressing the <F2> key after the Power-On Self-Test (POST)
memory test begins and before the operating system boot begins. The menu bar is shown below.
Maintenance Main
Advanced
Security
Power
Boot
Exit
NOTE
The maintenance menu is displayed only when the Desktop Board is in configure mode. Section 2.8
on page 52 shows how to put the Desktop Board in configure mode.
65
Intel Desktop Board D915PLWD Technical Product Specification
Table 36 lists the BIOS Setup program menu features.
Table 36.
BIOS Setup Program Menu Bar
Maintenance
Main
Advanced
Security
Power
Boot
Clears
passwords and
displays
processor
information
Displays
processor
and memory
configuration
Configures
advanced
features
available
through the
chipset
Sets
passwords
and security
features
Selects boot
Configures
options
power
management
features and
power supply
controls
Exit
Saves or
discards
changes to
Setup
program
options
Table 37 lists the function keys available for menu screens.
Table 37.
BIOS Setup Program Function Keys
BIOS Setup Program Function Key
Description
<←> or <→>
Selects a different menu screen (Moves the cursor left or right)
<↑> or <↓>
Selects an item (Moves the cursor up or down)
<Tab>
Selects a field (Not implemented)
<Enter>
Executes command or selects the submenu
<F9>
Load the default configuration values for the current menu
<F10>
Save the current values and exits the BIOS Setup program
<Esc>
Exits the menu
3.2 BIOS Flash Memory Organization
The Firmware Hub (FWH) includes a 4 Mbit (512 KB) symmetrical flash memory device.
3.3 Resource Configuration
3.3.1
PCI Autoconfiguration
The BIOS can automatically configure PCI devices. PCI devices may be onboard or add-in cards.
Autoconfiguration lets a user insert or remove PCI cards without having to configure the system.
When a user turns on the system after adding a PCI card, the BIOS automatically configures
interrupts, the I/O space, and other system resources. Any interrupts set to Available in Setup are
considered to be available for use by the add-in card.
3.3.2
PCI IDE Support
If you select Auto in the BIOS Setup program, the BIOS automatically sets up the PCI IDE
connector with independent I/O channel support. The IDE interface supports hard drives up to
ATA-66/100 and recognizes any ATAPI compliant devices, including CD-ROM drives, tape
drives, and Ultra DMA drives. The 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
66
Overview of BIOS Features
to PIO Mode 3 or 4, depending on the capability of the drive. You can override the autoconfiguration options by specifying manual configuration in the BIOS Setup program.
To use ATA-66/100 features the following items are required:
•
•
•
An ATA-66/100 peripheral device
An ATA-66/100 compatible cable
ATA-66/100 operating system device drivers
NOTE
Do not connect an ATA device as a slave on the same IDE cable as an ATAPI master device. For
example, do not connect an ATA hard drive as a slave to an ATAPI CD-ROM drive.
3.4 System Management BIOS (SMBIOS)
SMBIOS is a Desktop Management Interface (DMI) compliant method for managing computers in
a managed network.
The main component of SMBIOS is the Management Information Format (MIF) database, which
contains information about the computing system and its components. Using SMBIOS, a system
administrator can obtain the system types, capabilities, operational status, and installation dates for
system components. The MIF database defines the data and provides the method for accessing this
information. The BIOS enables applications such as third-party management software to use
SMBIOS. The BIOS stores and reports the following SMBIOS information:
•
•
•
•
BIOS data, such as the BIOS revision level
Fixed-system data, such as peripherals, serial numbers, and asset tags
Resource data, such as memory size, cache size, and processor speed
Dynamic data, such as event detection and error logging
Non-Plug and Play operating systems, such as Windows NT*, require an additional interface for
obtaining the SMBIOS information. The BIOS supports an SMBIOS table interface for such
operating systems. Using this support, an SMBIOS service-level application running on a
non-Plug and Play operating system can obtain the SMBIOS information.
3.5 Legacy USB Support
Legacy USB support enables USB devices to be used even when the operating system’s USB
drivers are not yet available. Legacy USB support is used to access the BIOS Setup program, and
to install an operating system that supports USB.
Legacy USB support operates as follows:
1. When you apply power to the computer, legacy support is disabled.
2. POST begins.
3. Legacy USB support is enabled by the BIOS allowing you to use a USB keyboard to enter and
configure the BIOS Setup program and the maintenance menu.
4. POST completes.
67
Intel Desktop Board D915PLWD Technical Product Specification
5. The operating system loads. While the operating system is loading, USB keyboards and mice
are recognized and may be used to configure the operating system.
6. After the operating system loads the USB drivers, all legacy and non-legacy USB devices are
recognized by the operating system, and Legacy USB support from the BIOS is no longer used.
To install an operating system that supports USB, follow the operating system’s installation
instructions.
3.6 BIOS Updates
The BIOS can be updated using either of the following utilities, which are available on the Intel
World Wide Web site:
•
•
Intel® Express BIOS Update utility, which enables automated updating while in the Windows
environment. Using this utility, the BIOS can be updated from a file on a hard disk, a 1.44 MB
diskette, or a CD-ROM, or from the file location on the Web.
Intel® Flash Memory Update Utility, which requires creation of a boot diskette and manual
rebooting of the system. Using this utility, the BIOS can be updated from a file on a 1.44 MB
diskette (from a legacy diskette drive) or a CD-ROM.
Both utilities verify that the updated BIOS matches the target system to prevent accidentally
installing an incompatible BIOS.
NOTE
Review the instructions distributed with the upgrade utility before attempting a BIOS update.
For information about
Refer to
The Intel World Wide Web site
Section 1.2, page 15
3.6.1
Language Support
The BIOS Setup program and help messages are supported in US English. Additional languages
are available in the Integrator’s Toolkit utility. Check the Intel website for details.
3.6.2
Custom Splash Screen
During POST, an Intel® splash screen is displayed by default. This splash screen can be augmented
with a custom splash screen. The Integrator’s Toolkit that is available from Intel can be used to
create a custom splash screen.
NOTE
If you add a custom splash screen, it will share space with the Intel branded logo.
68
For information about
Refer to
The Intel World Wide Web site
Section 1.2, page 15
Overview of BIOS Features
3.7 Boot Options
In the BIOS Setup program, the user can choose to boot from a diskette drive, hard drives,
CD-ROM, or the network. The default setting is for the diskette drive to be the first boot device,
the hard drive second, and the ATAPI CD-ROM third. The fourth device is disabled.
3.7.1
CD-ROM Boot
Booting from CD-ROM is supported in compliance to the El Torito bootable CD-ROM format
specification. Under the Boot menu in the BIOS Setup program, ATAPI CD-ROM is listed as a
boot device. Boot devices are defined in priority order. Accordingly, if there is not a bootable CD
in the CD-ROM drive, the system will attempt to boot from the next defined drive.
3.7.2
Network Boot
The network can be selected as a boot device. This selection allows booting from the onboard LAN
or a network add-in card with a remote boot ROM installed.
Pressing the <F12> key during POST automatically forces booting from the LAN. To use this key
during POST, the User Access Level in the BIOS Setup program's Security menu must be
set to Full.
3.7.3
Booting Without Attached Devices
For use in embedded applications, the BIOS has been designed so that after passing the POST, the
operating system loader is invoked even if the following devices are not present:
•
•
•
3.7.4
Video adapter
Keyboard
Mouse
Changing the Default Boot Device During POST
Pressing the <F10> key during POST causes a boot device menu to be displayed. This menu
displays the list of available boot devices (as set in the BIOS setup program’s Boot Device Priority
Submenu). Table 38 lists the boot device menu options.
Table 38.
Boot Device Menu Options
Boot Device Menu Function Keys
Description
<↑> or <↓>
Selects a default boot device
<Enter>
Exits the menu, saves changes, and boots from the selected device
<Esc>
Exits the menu without saving changes
69
Intel Desktop Board D915PLWD Technical Product Specification
3.8 Adjusting Boot Speed
These factors affect system boot speed:
•
•
3.8.1
Selecting and configuring peripherals properly
Optimized BIOS boot parameters
Peripheral Selection and Configuration
The following techniques help improve system boot speed:
•
•
•
•
3.8.2
Choose a hard drive with parameters such as “power-up to data ready” less than eight seconds,
that minimize hard drive startup delays.
Select a CD-ROM drive with a fast initialization rate. This rate can influence POST
execution time.
Eliminate unnecessary add-in adapter features, such as logo displays, screen repaints, or mode
changes in POST. These features may add time to the boot process.
Try different monitors. Some monitors initialize and communicate with the BIOS more
quickly, which enables the system to boot more quickly.
BIOS Boot Optimizations
Use of the following BIOS Setup program settings reduces the POST execution time.
In the Boot Menu:
•
•
Set the hard disk drive as the first boot device. As a result, the POST does not first seek a
diskette drive, which saves about one second from the POST execution time.
Disable Quiet Boot, which eliminates display of the logo splash screen. This could save several
seconds of painting complex graphic images and changing video modes.
In the Peripheral Configuration submenu, disable the LAN device if it will not be used. This can
reduce up to four seconds of option ROM boot time.
NOTE
It is possible to optimize the boot process to the point where the system boots so quickly that the
Intel® logo screen (or a custom logo splash screen) will not be seen. Monitors and hard disk drives
with minimum initialization times can also contribute to a boot time that might be so fast that
necessary logo screens and POST messages cannot be seen.
This boot time may be so fast that some drives might be not be initialized at all. If this condition
should occur, it is possible to introduce a programmable delay ranging from three to 30 seconds
(using the Hard Disk Pre-Delay feature of the Advanced Menu in the Drive Configuration Submenu
of the BIOS Setup program).
70
Overview of BIOS Features
3.9 BIOS Security Features
The BIOS includes security features that restrict access to the BIOS Setup program and who can
boot the computer. A supervisor password and a user password can be set for the BIOS Setup
program and for booting the computer, with the following restrictions:
•
•
•
•
•
•
•
The supervisor password gives unrestricted access to view and change all the Setup options in
the BIOS Setup program. This is the supervisor mode.
The user password gives restricted access to view and change Setup options in the BIOS Setup
program. This is the user mode.
If only the supervisor password is set, pressing the <Enter> key at the password prompt of the
BIOS Setup program allows the user restricted access to Setup.
If both the supervisor and user passwords are set, users can enter either the supervisor password
or the user password to access Setup. Users have access to Setup respective to which password
is entered.
Setting the user password restricts who can boot the computer. The password prompt will be
displayed before the computer is booted. If only the supervisor password is set, the computer
boots without asking for a password. If both passwords are set, the user can enter either
password to boot the computer.
For enhanced security, use different passwords for the supervisor and user passwords.
Valid password characters are A-Z, a-z, and 0-9. Passwords may be up to 16 characters in
length.
Table 39 shows the effects of setting the supervisor password and user password. This table is for
reference only and is not displayed on the screen.
Table 39.
Supervisor and User Password Functions
Supervisor
Password Set Mode
User Mode
Setup Options
Password to
Enter Setup
Password
During Boot
Neither
Can change all
options (Note)
Can change all None
options (Note)
None
None
Supervisor
only
Can change all
options
Can change a
limited number
of options
Supervisor
None
User only
N/A
Can change all Enter Password
options
Clear User Password
User
User
Supervisor
and user set
Can change all
options
Can change a
limited number
of options
Supervisor or
user
Supervisor or
user
Note:
Supervisor Password
Supervisor Password
Enter Password
If no password is set, any user can change all Setup options.
71
Intel Desktop Board D915PLWD Technical Product Specification
72
4 Error Messages and Beep Codes
What This Chapter Contains
4.1
4.2
4.3
4.4
4.5
BIOS Error Messages .................................................................................................. 73
Port 80h POST Codes ................................................................................................. 75
Bus Initialization Checkpoints ...................................................................................... 79
Speaker ....................................................................................................................... 80
BIOS Beep Codes........................................................................................................ 80
4.1 BIOS Error Messages
Table 40 lists the error messages and provides a brief description of each.
Table 40.
BIOS Error Messages
Error Message
Explanation
GA20 Error
An error occurred with Gate A20 when switching to protected
mode during the memory test.
Pri Master HDD Error
Pri Slave HDD Error
Could not read sector from corresponding drive.
Pri Master Drive - ATAPI Incompatible
Pri Slave Drive - ATAPI Incompatible
Corresponding drive in not an ATAPI device. Run Setup to make
sure device is selected correctly.
A: Drive Error
No response from diskette drive.
Cache Memory Bad
An error occurred when testing L2 cache. Cache memory may be
bad.
CMOS Battery Low
The battery may be losing power. Replace the battery soon.
CMOS Display Type Wrong
The display type is different than what has been stored in CMOS.
Check Setup to make sure type is correct.
CMOS Checksum Bad
The CMOS checksum is incorrect. CMOS memory may have
been corrupted. Run Setup to reset values.
CMOS Settings Wrong
CMOS values are not the same as the last boot. These values
have either been corrupted or the battery has failed.
CMOS Date/Time Not Set
The time and/or date values stored in CMOS are invalid. Run
Setup to set correct values.
DMA Error
Error during read/write test of DMA controller.
FDC Failure
Error occurred trying to access diskette drive controller.
HDC Failure
Error occurred trying to access hard disk controller.
Checking NVRAM.....
NVRAM is being checked to see if it is valid.
continued
73
Intel Desktop Board D915PLWD Technical Product Specification
Table 40.
BIOS Error Messages (continued)
Error Message
Explanation
Update OK!
NVRAM was invalid and has been updated.
Updated Failed
NVRAM was invalid but was unable to be updated.
Keyboard Error
Error in the keyboard connection. Make sure keyboard is
connected properly.
KB/Interface Error
Keyboard interface test failed.
Memory Size Decreased
Memory size has decreased since the last boot. If no memory was
removed then memory may be bad.
Memory Size Increased
Memory size has increased since the last boot. If no memory was
added there may be a problem with the system.
Memory Size Changed
Memory size has changed since the last boot. If no memory was
added or removed then memory may be bad.
No Boot Device Available
System did not find a device to boot.
Off Board Parity Error
A parity error occurred on an off-board card. This error is followed
by an address.
On Board Parity Error
A parity error occurred in onboard memory. This error is followed
by an address.
Parity Error
A parity error occurred in onboard memory at an unknown
address.
NVRAM/CMOS/PASSWORD cleared by NVRAM, CMOS, and passwords have been cleared. The system
Jumper
should be powered down and the jumper removed.
<CTRL_N> Pressed
74
CMOS is ignored and NVRAM is cleared. User must enter Setup.
Error Messages and Beep Codes
4.2 Port 80h POST Codes
During the POST, the BIOS generates diagnostic progress codes (POST-codes) to I/O port 80h. If
the POST fails, execution stops and the last POST code generated is left at port 80h. This code is
useful for determining the point where an error occurred.
Displaying the POST-codes requires a PCI bus add-in card, often called a POST card. The POST
card can decode the port and display the contents on a medium such as a seven-segment display.
NOTE
The POST card must be installed in PCI bus connector 1.
The tables below offer descriptions of the POST codes generated by the BIOS. Table 41 defines
the uncompressed INIT code checkpoints, Table 42 describes the boot block recovery code
checkpoints, and Table 43 lists the runtime code uncompressed in F000 shadow RAM. Some codes
are repeated in the tables because that code applies to more than one operation.
Table 41.
Uncompressed INIT Code Checkpoints
Code
Description of POST Operation
D0
NMI is Disabled. Onboard KBC, RTC enabled (if present). Init code Checksum verification
starting.
D1
Keyboard controller BAT test, CPU ID saved, and going to 4 GB flat mode.
D3
Do necessary chipset initialization, start memory refresh, and do memory sizing.
D4
Verify base memory.
D5
Init code to be copied to segment 0 and control to be transferred to segment 0.
D6
Control is in segment 0. To check recovery mode and verify main BIOS checksum. If either it is
recovery mode or main BIOS checksum is bad, go to check point E0 for recovery else go to check
point D7 for giving control to main BIOS.
D7
Find Main BIOS module in ROM image.
D8
Uncompress the main BIOS module.
D9
Copy main BIOS image to F000 shadow RAM and give control to main BIOS in F000
shadow RAM.
Table 42.
Boot Block Recovery Code Checkpoints
Code
Description of POST Operation
E0
Onboard Floppy Controller (if any) is initialized. Compressed recovery code is uncompressed in
F000:0000 in Shadow RAM and give control to recovery code in F000 Shadow RAM. Initialize
interrupt vector tables, initialize system timer, initialize DMA controller and interrupt controller.
E8
Initialize extra (Intel Recovery) Module.
E9
Initialize floppy drive.
EA
Try to boot from floppy. If reading of boot sector is successful, give control to boot sector code.
EB
Booting from floppy failed, look for ATAPI (LS-120, Zip) devices.
EC
Try to boot from ATAPI. If reading of boot sector is successful, give control to boot sector code.
EF
Booting from floppy and ATAPI device failed. Give two beeps. Retry the booting procedure again
(go to check point E9).
75
Intel Desktop Board D915PLWD Technical Product Specification
Table 43.
Runtime Code Uncompressed in F000 Shadow RAM
Code
Description of POST Operation
03
NMI is Disabled. To check soft reset/power-on.
05
BIOS stack set. Going to disable cache if any.
06
POST code to be uncompressed.
07
CPU init and CPU data area init to be done.
08
CMOS checksum calculation to be done next.
0B
Any initialization before keyboard BAT to be done next.
0C
KB controller I/B free. To issue the BAT command to keyboard controller.
0E
Any initialization after KB controller BAT to be done next.
0F
Keyboard command byte to be written.
10
Going to issue Pin-23,24 blocking/unblocking command.
11
Going to check pressing of <INS>, <END> key during power-on.
12
To init CMOS if "Init CMOS in every boot" is set or <END> key is pressed. Going to disable DMA
and Interrupt controllers.
13
Video display is disabled and port-B is initialized. Chipset init about to begin.
14
8254 timer test about to start.
19
About to start memory refresh test.
1A
Memory Refresh line is toggling. Going to check 15 µs ON/OFF time.
23
To read 8042 input port and disable Megakey GreenPC feature. Make BIOS code segment
writeable.
24
To do any setup before Int vector init.
25
Interrupt vector initialization to begin. To clear password if necessary.
27
Any initialization before setting video mode to be done.
28
Going for monochrome mode and color mode setting.
2A
Different buses init (system, static, output devices) to start if present. (See Section 4.3 for details
of different buses.)
2B
To give control for any setup required before optional video ROM check.
2C
To look for optional video ROM and give control.
2D
To give control to do any processing after video ROM returns control.
2E
If EGA/VGA not found then do display memory R/W test.
2F
EGA/VGA not found. Display memory R/W test about to begin.
30
Display memory R/W test passed. About to look for the retrace checking.
31
Display memory R/W test or retrace checking failed. To do alternate Display memory R/W test.
32
Alternate Display memory R/W test passed. To look for the alternate display retrace checking.
34
Video display checking over. Display mode to be set next.
37
Display mode set. Going to display the power-on message.
38
Different buses init (input, IPL, general devices) to start if present. (See Section 4.3 for details of
different buses.)
39
Display different buses initialization error messages. (See Section 4.3 for details of different
buses.)
3A
New cursor position read and saved. To display the Hit <DEL> message.
continued
76
Error Messages and Beep Codes
Table 43.
Runtime Code Uncompressed in F000 Shadow RAM (continued)
Code
Description of POST Operation
40
To prepare the descriptor tables.
42
To enter in virtual mode for memory test.
43
To enable interrupts for diagnostics mode.
44
To initialize data to check memory wrap around at 0:0.
45
Data initialized. Going to check for memory wrap around at 0:0 and finding the total system
memory size.
46
Memory wrap around test done. Memory size calculation over. About to go for writing patterns to
test memory.
47
Pattern to be tested written in extended memory. Going to write patterns in base 640k memory.
48
Patterns written in base memory. Going to find out amount of memory below 1M memory.
49
Amount of memory below 1M found and verified. Going to find out amount of memory above 1M
memory.
4B
Amount of memory above 1M found and verified. Check for soft reset and going to clear memory
below 1M for soft reset. (If power on, go to check point # 4Eh).
4C
Memory below 1M cleared. (SOFT RESET) Going to clear memory above 1M.
4D
Memory above 1M cleared. (SOFT RESET) Going to save the memory size. (Go to check
point # 52h).
4E
Memory test started. (NOT SOFT RESET) About to display the first 64k memory size.
4F
Memory size display started. This will be updated during memory test. Going for sequential and
random memory test.
50
Memory testing/initialization below 1M complete. Going to adjust displayed memory size for
relocation/shadow.
51
Memory size display adjusted due to relocation/ shadow. Memory test above 1M to follow.
52
Memory testing/initialization above 1M complete. Going to save memory size information.
53
Memory size information is saved. CPU registers are saved. Going to enter in real mode.
54
Shutdown successful, CPU in real mode. Going to disable gate A20 line and disable parity/NMI.
57
A20 address line, parity/NMI disable successful. Going to adjust memory size depending on
relocation/shadow.
58
Memory size adjusted for relocation/shadow. Going to clear Hit <DEL> message.
59
Hit <DEL> message cleared. <WAIT...> message displayed. About to start DMA and interrupt
controller test.
60
DMA page register test passed. To do DMA#1 base register test.
62
DMA#1 base register test passed. To do DMA#2 base register test.
65
DMA#2 base register test passed. To program DMA unit 1 and 2.
66
DMA unit 1 and 2 programming over. To initialize 8259 interrupt controller.
7F
Extended NMI sources enabling is in progress.
80
Keyboard test started. Clearing output buffer, checking for stuck key, to issue keyboard reset
command.
81
Keyboard reset error/stuck key found. To issue keyboard controller interface test command.
82
Keyboard controller interface test over. To write command byte and init circular buffer.
83
Command byte written, global data init done. To check for lock-key.
continued
77
Intel Desktop Board D915PLWD Technical Product Specification
Table 43.
Runtime Code Uncompressed in F000 Shadow RAM (continued)
Code
Description of POST Operation
84
Lock-key checking over. To check for memory size mismatch with CMOS.
85
Memory size check done. To display soft error and check for password or bypass setup.
86
Password checked. About to do programming before setup.
87
Programming before setup complete. To uncompress SETUP code and execute CMOS setup.
88
Returned from CMOS setup program and screen is cleared. About to do programming after setup.
89
Programming after setup complete. Going to display power-on screen message.
8B
First screen message displayed. <WAIT...> message displayed. PS/2 Mouse check and
extended BIOS data area allocation to be done.
8C
Setup options programming after CMOS setup about to start.
8D
Going for hard disk controller reset.
8F
Hard disk controller reset done. Floppy setup to be done next.
91
Floppy setup complete. Hard disk setup to be done next.
95
Init of different buses optional ROMs from C800 to start. (See Section 4.3 for details of different
buses.)
96
Going to do any init before C800 optional ROM control.
97
Any init before C800 optional ROM control is over. Optional ROM check and control will be
done next.
98
Optional ROM control is done. About to give control to do any required processing after optional
ROM returns control and enable external cache.
99
Any initialization required after optional ROM test over. Going to setup timer data area and printer
base address.
9A
Return after setting timer and printer base address. Going to set the RS-232 base address.
9B
Returned after RS-232 base address. Going to do any initialization before Coprocessor test.
9C
Required initialization before Coprocessor is over. Going to initialize the Coprocessor next.
9D
Coprocessor initialized. Going to do any initialization after Coprocessor test.
9E
Initialization after Coprocessor test is complete. Going to check extended keyboard, keyboard ID
and num-lock.
A2
Going to display any soft errors.
A3
Soft error display complete. Going to set keyboard typematic rate.
A4
Keyboard typematic rate set. To program memory wait states.
A5
Going to enable parity/NMI.
A7
NMI and parity enabled. Going to do any initialization required before giving control to optional
ROM at E000.
A8
Initialization before E000 ROM control over. E000 ROM to get control next.
A9
Returned from E000 ROM control. Going to do any initialization required after E000 optional ROM
control.
AA
Initialization after E000 optional ROM control is over. Going to display the system configuration.
AB
Put INT13 module runtime image to shadow.
AC
Generate MP for multiprocessor support (if present).
AD
Put CGA INT10 module (if present) in Shadow.
continued
78
Error Messages and Beep Codes
Table 43.
Runtime Code Uncompressed in F000 Shadow RAM (continued)
Code
Description of POST Operation
AE
Uncompress SMBIOS module and init SMBIOS code and form the runtime SMBIOS image in
shadow.
B1
Going to copy any code to specific area.
00
Copying of code to specific area done. Going to give control to INT-19 boot loader.
4.3 Bus Initialization Checkpoints
The system BIOS gives control to the different buses at several checkpoints to do various tasks.
Table 44 describes the bus initialization checkpoints.
Table 44.
Bus Initialization Checkpoints
Checkpoint
Description
2A
Different buses init (system, static, and output devices) to start if present.
38
Different buses init (input, IPL, and general devices) to start if present.
39
Display different buses initialization error messages.
95
Init of different buses optional ROMs from C800 to start.
While control is inside the different bus routines, additional checkpoints are output to port 80h as
WORD to identify the routines under execution. In these WORD checkpoints, the low byte of the
checkpoint is the system BIOS checkpoint from which the control is passed to the different bus
routines. The high byte of the checkpoint is the indication of which routine is being executed in the
different buses. Table 45 describes the upper nibble of the high byte and indicates the function that
is being executed.
Table 45.
Upper Nibble High Byte Functions
Value
Description
0
func#0, disable all devices on the bus concerned.
1
func#1, static devices init on the bus concerned.
2
func#2, output device init on the bus concerned.
3
func#3, input device init on the bus concerned.
4
func#4, IPL device init on the bus concerned.
5
func#5, general device init on the bus concerned.
6
func#6, error reporting for the bus concerned.
7
func#7, add-on ROM init for all buses.
79
Intel Desktop Board D915PLWD Technical Product Specification
Table 46 describes the lower nibble of the high byte and indicates the bus on which the routines are
being executed.
Table 46.
Lower Nibble High Byte Functions
Value
Description
0
Generic DIM (Device Initialization Manager)
1
On-board System devices
2
ISA devices
3
EISA devices
4
ISA PnP devices
5
PCI devices
4.4 Speaker
A 47 Ω inductive speaker is mounted on the board. The speaker provides audible error code (beep
code) information during POST.
For information about
Refer to
The location of the onboard speaker
Figure 1, on page 12
4.5 BIOS Beep Codes
Whenever a recoverable error occurs during POST, the BIOS displays an error message describing
the problem (see Table 47). The BIOS also issues a beep code (one long tone followed by two
short tones) during POST if the video configuration fails (a faulty video card or no card installed)
or if an external ROM module does not properly checksum to zero.
An external ROM module (for example, a video BIOS) can also issue audible errors, usually
consisting of one long tone followed by a series of short tones. For more information on the beep
codes issued, check the documentation for that external device.
There are several POST routines that issue a POST terminal error and shut down the system if they
fail. Before shutting down the system, the terminal-error handler issues a beep code signifying the
test point error, writes the error to I/O port 80h, attempts to initialize the video and writes the error
in the upper left corner of the screen (using both monochrome and color adapters). If POST
completes normally, the BIOS issues one short beep before passing control to the operating system.
Table 47.
80
Beep Codes
Beep
Description
1
CPU error
3
Memory error
6
System failure
7
System failure
8
Video error