Intel Desktop Board D845GLLY User manual

Intel®Desktop Board
845GL Chipset Family
Specification Update
Release Date: November 2003
Order Number: A98269-009
IntelDesktop Boards using the Intel845GL chipset may contain design defects or errors known
as errata which may cause the product to deviate from published specifications. Current
characterized errata are documented in this Specification Update and its companion document,
the IntelDesktop Board Product Supplement Specification Update.

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OTHER INTELLECTUAL PROPERTY RIGHT. INTEL PRODUCTS ARE NOT INTENDED FOR USE IN MEDICAL, LIFE
SAVING, LIFE SUSTAINING APPLICATIONS.
Intel may make changes to specifications and product descriptions at any time, without notice.
Designers must not rely on the absence or characteristics of any features or instructions marked “reserved”or “undefined”.
Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from
future changes to them.
The Inteldesktop boards using the Intel845GL chipset may contain design defects or errors known as errata which may
cause the product to deviate from published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.
Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be
obtained from:
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* Other names and brands may be claimed as the property of others.
Copyright 2002, 2003, Intel Corporation.

CONTENTS
REVISION HISTORY ...................................................................................................................................v
PREFACE ...................................................................................................................................................vi
Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
GENERAL INFORMATION ..........................................................................................................................3
SPECIFICATION CHANGES .......................................................................................................................6
ERRATA.....................................................................................................................................................17
SPECIFICATION CLARIFICATIONS..........................................................................................................19
DOCUMENTATION CHANGES .................................................................................................................21

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
v
REVISION HISTORY
Date of Revision Version Description
June 2002 -001 This document is the first Specification Update for IntelDesktop
Boards using the Intel845GL chipset. Added Document
Changes 1 and 2.
August 2002 -002 Added Specification Change 1.
September 2002 -003 Added Erratum 1. Removed Printed Board Assembly (PBA)
information from the document, as this reference is no longer
valid. Updated the Legal Disclaimer Section.
October 2002 -004 Added Specification Changes 2, 3. Added Erratum 2.
February 2003 -005 Moved Specification Changes 4-8 from the Intel
Desktop Board
D845GLAD Product Supplement Document (Order number
A98273). Added Errata 3. Added Specification Clarification 1.
March 2003 -006 Added Erratum 4. Added Documentation Changes 3, 4.
April 2003 -007 Added Documentation Change 5.
July 2003 -008 Added Specification Change 9.
November 2003 -009 Added Specification Clarification 2.

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
v
i
PREFACE
This document is an update to the specifications contained in the Technical Product Specification for Intel
Desktop Boards using the 845GL Chipset (Order number A90788). It is intended for hardware system
manufacturers and software developers of applications, operating systems, or tools. It will contain
Specification Changes, Errata, Specification Clarifications, and Documentation Changes.
Refer to the Intel
Pentium4 Processor Specification Update (Order number 249199) for specification
updates concerning the Intel Pentium 4 processor and that may apply to the IntelDesktop Board 845GL
chipset family. Unless otherwise noted in this document, it should be assumed that any processor errata for
a given stepping are applicable to the Altered Assembly (AA) revision(s) associated with that stepping.
Refer to the Intel
845 Chipset: 82845 Memory Controller Hub (MCH) Specification Update (Order Number
298589) for specification updates concerning the 82845GL MCH Controller and that may apply to the Intel
Desktop Board 845GL chipset family. Unless otherwise noted in this document, it should be assumed that
any MCH errata for a given stepping are applicable to the Altered Assembly (AA) revision(s) associated with
that stepping.
Refer to the Intel
82801DB I/O Controller Hub 4 (ICH4) Specification Update (Order Number 290745) for
specification updates concerning the 82801 I/O Controller Hub and that may apply to the IntelDesktop
Board 845GL chipset family. Unless otherwise noted in this document, it should be assumed that any
82801DB I/O Controller Hub (ICH) errata for a given stepping are applicable to the Altered Assembly (AA)
revision(s) associated with that stepping.
Nomenclature
Specification Changes are modifications to the current published specifications. These changes will be
incorporated in the next release of the specifications.
Errata are design defects or errors. Characterized errata may cause desktop boards using the Intel845GL
chipset’s behavior to deviate from published specifications. Hardware and software designed to be used with
any given Altered Assembly (AA) and BIOS revision level must assume that all errata documented for that
AA and BIOS revision level are present on all desktop boards.
Specification Clarifications describe a specification in greater detail or further highlight a specification’s
impact to a complex design situation. These clarifications will be incorporated in the next release of the
specifications.
Documentation Changes include typos, errors, or omissions from the current published specifications.
These changes will be incorporated in the next release of the specifications.

Specification Update for
Intel®Desktop Boards Using the Intel®845GL Chipset

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
3
GENERAL INFORMATION
Information contained in the Specification Update for Intel
Desktop Boards using the Intel 845GL Chipset
is intended to be used with Product Supplement Specification Update documents (available separately).

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
4
Summary Table of Changes
The following table indicates the Specification Changes, Errata, Specification Clarifications, or Documentation
Changes that apply to desktop boards using the Intel845GL chipset. Intel intends to fix some of the errata
in a future revision of the desktop board, and to account for the other outstanding issues through
documentation or specification changes as noted. This table uses the following notations:
CODES USED IN SUMMARY TABLE
Doc: Document change or update that will be implemented.
PlanFix: This erratum may be fixed in a future revision of the desktop board, driver, or
BIOS.
Fixed: This erratum has been previously fixed.
NoFix: There are no plans to fix this erratum.
Shaded: This erratum is either new or modified from the previous version of the document.
NO. PLANS SPECIFICATION CHANGES
1 Doc Change to description of Section 1.11.1, Fan Monitoring
2 Doc Change to section 1.11.2, Chassis Intrusion
3 Doc Addition to section 4.5, Security Menu BIOS setup options
4 Doc Change to description of Section 1.4, Board Layout
5 Doc Change to description of Section 2.2, Connectors
6 Doc Change To Description of Section 2.2.2.2, Audio, Power, And Hardware Control
Connectors
7 Doc Addition of Table 5A, Front Panel Audio Connector
8 Doc Change to description of Section 2.3, Jumper Block
9 Doc Change to Section 4.3, Main Menu, BIOS Setup Program
NO. PLANS ERRATA
1 Fixed Intel82801DB I/O Controller Hub 4 (ICH 4) Erratum 7
2 Fixed Wake from an ACPI sleep state using wake methodologies may fail
3 PlanFix Intel 82801DB I/O Controller 4 (ICH 4) Erratum 8
4 PlanFix Supervisor Password Cleared When 256MB or Greater System Memory is Used
NO. PLANS SPECIFICATION CLARIFICATIONS
1 Doc Addition of Table 4A, Section 2.2.2.2, Audio, Power, and Hardware Control Connectors
2 Doc Clarification of SMBus routing
NO. PLANS DOCUMENTATION CHANGES
1 Doc Change to Description of Section 3.8.2, Network Boot
2 Doc Change to description of Section 3.8.4, Changing the Default Boot Device During POST
3 Doc Removed Note That Specifies USB 2.0 Support Limited to Windows* 2000 and
Windows XP From Section 1.7.2, USB

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
5
NO. PLANS DOCUMENTATION CHANGES (continued)
4 Doc Removed ESCD Format Reference From Section 3.3.1, PCI Auto configuration
5 Doc Add Alert Standard Format Specification Version 1.03 Dated June 20, 2001 to Section 1.4,
Design Specifications

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
6
SPECIFICATION CHANGES
The Specification Changes listed in this section apply to the Technical Product Specification for Intel

Desktop Boards using the Intel
845GL Chipset (Order Number A90788). All Specification Changes will be
incorporated into a future version of that specification.
1. Change to Description of Section 1.11.1, Fan Monitoring
Section 1.11.1, Fan Monitoring will change in its entirety as follows:
1.11.1 FAN MONITORING
Fan monitoring can be implemented using IntelLANDesk Client Manager, or third-
party software.
For information about Refer to
The functions of the fan connectors Section 1.12.2.2, page 34
2. Change to Section 1.11.2, Chassis Intrusion
Section 1.11.2 will change in its entirety as follows:
1.11.2 CHASSIS INTRUSION AND DETECTION
The Desktop Boards support 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.
3. Addition to Section 4.5, Security Menu BIOS Setup Options
4.5 Security Menu
To access this menu, select Security from the menu bar at the top of the screen.
Maintenance Main Advanced Security Power Boot Exit
The menu represented by Table 38 is for setting passwords and security features.
Table 38. Security Menu
Feature Options Description
Supervisor Password No options Reports if there is a supervisor
password set.
User Password No options Reports if there is a user
password set.

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
7
Table 38. Security Menu (cont)
Feature Options Description
Set Supervisor
Password
Password can be up to
seven alphanumeric
characters.
Specifies the supervisor
password.
User Access Level
(Note 1)
• No Access
• View Only
• Limited
• Full (default)
Sets BIOS Setup Utility access
rights for user level.
Set User Password Password can be up to
seven alphanumeric
characters.
Specifies the user password.
Clear User Password
(Note 2)
• Ok (default)
• Cancel
Clears the user password.
Chassis Intrusion • Disabled (default)
• Log
• Log, notify once
• Log, notify til cleared
Disables Chassis Intrusion
Logs the intrusion in the event log
Halts system during POST. User
must press <F4> to continue.
Intrusion flag is cleared and the
event log is updated.
Halts system during POST. User
must enter BIOS setup Security
Menu and select “Clear Chassis
Intrusion Status”to clear the
Chassis intrusion flag.
Clear Chassis Intrusion
Status
(Note 3)
• No Options Clears Chassis Intrusion event
and updates the Event Log.
Notes:
1. This feature appears only if a supervisor password has been set.
2. This feature appears only if a user password has been set.
3. This feature appears only if the Chassis Intrusion log, notify til cleared option has been set.
4. Change to Description of Section 1.4, Board Layout
Section 1.4, Board Layout will change in its entirety as follows:

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
8
1.4 Board Layout
Figure 1 shows the location of the major components on the Desktop Board D845GLAD.
OM15065
D
AB C
F
H
J
I
G
E
TLNMPQRSOU
W
X
Y
Z
VK
AA

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
9
Figure 1 (continued)
A Audio codec O IDE connectors
B Auxiliary line-in connector P Speaker
C ATAPI CD-ROM connector Q Battery
D Back panel connectors R Auxiliary front panel power LED
connector
E +12V power connector (ATX12V) S Front chassis fan connector
F Rear chassis fan connector T Chassis intrusion connector
G Intel82845GV Graphics and Memory
Controller Hub (GMCH)
U BIOS Setup configuration jumper
block
H mPGA478 processor socket V 4 Mbit Firmware Hub (FWH)
I Processor fan connector W Front panel connector
J DIMM sockets X Front panel USB connector
K Serial port B connector Y Intel82801DB I/O Controller Hub
(ICH4)
L I/O Controller Z PCI bus add-in card connectors
M Power connector AA Front panel audio connector
N Diskette drive connector
Figure 1. Desktop Board D845GLAD Components
5. Change to Description of Section 2.2, Connectors
Section 2.2, Connectors will change in its entirety as follows:
2.2 Connectors
CAUTION
Only the back panel USB, front panel USB, VGA, and PS/2 connectors have
overcurrent protection. The Desktop Boards’ internal connectors are not
overcurrent protected and should connect only to devices inside the computer’s
chassis, such as fans and internal peripherals. Do not use these connectors to
power devices external to the computer’s chassis. A fault in the load presented
by the external devices could cause damage to the computer, the interconnecting
cable, and the external devices themselves.

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
10
This section describes the Desktop Board’s connectors. The connectors can be divided into the following
groups:
• Back panel I/O connectors (see page 13)
 PS/2* keyboard and mouse
 USB
 Parallel port
 Serial port
 VGA
 LAN (optional)
 Audio (line out, line in, and mic in)
• Internal I/O connectors (see page 14)
 Audio (auxiliary line input and ATAPI CD-ROM, and front panel audio)
 Fans
 Power
 Add-in boards (PCI)
 IDE
 Diskette drive
 Chassis intrusion
• External I/O connectors (see page 19)
 Front panel USB
 Front panel (power/sleep/message-waiting LED, power switch, hard
drive activity LED, reset switch, and auxiliary front panel power LED)
 Auxiliary front panel power/sleep/message-waiting LED
# INTEGRATOR’S NOTE
When installing the Desktop Board in a microATX chassis, make sure that
peripheral devices are installed at least 1.5 inches above the main power
connector, the diskette drive connector, the IDE connector, and the DIMM
sockets.
6. Change to Description of Section 2.2.2.2, Audio, Power, and
Hardware Control Connectors
Section 2.2.2.2, Audio, Power, and Hardware Control Connectors will change in its entirety as follows:

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
11
2.2.2 Audio, Power, and Hardware Control Connectors
Figure 3 shows the location of the audio, power, and hardware control connectors.
OM15068
4
1
4
1
1
13
4
21
3
1
3
10
20 11
1
I H
F
E
G
BCD
1
3
A
12
910
Item Description For more information see:
A Front panel audio Table 3
B Auxiliary line in, ATAPI style (white) Table 4
C ATAPI CD-ROM (black) Table 5
D +12 V power connector (ATX12V) Table 6
E Rear chassis fan Table 7
F Processor fan Table 8
G Main power Table 9
H Front chassis fan Table 10
I Chassis intrusion Table 11
Figure 3. Audio, Power, and Hardware Control Connectors

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
12
7. Addition of Table 5A, Front Panel Audio Connector
Table 5A Front Panel Audio Connector
Pin Signal Name Pin Signal Name
1 MIC_IN 2 Ground
3 MIC_BIAS 4 +5 V
5 RIGHT_OUT 6 RIGHT_IN
7 Ground 8 Key
9 LEFT_OUT 10 LEFT_IN
✏ NOTE
The front panel audio connector is alternately used as a jumper block for routing
audio signals. Refer to Section 2.3 on page 23 for more information.
8. Change to Description of Section 2.3, Jumper Block
Section 2.3, Jumper Block will change in its entirety as follows:
2.3 Jumper Blocks
CAUTION
Do not move any jumpers with the power on. Always turn off the power and
unplug the power cord from the computer before changing a jumper setting.
Otherwise, the Desktop Board could be damaged.

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
13
Figure 6 shows the location of the jumper blocks.
OM15073
31
J9H2
B
J8A1
A
910
2
1
Item Description Reference Designator
A Front panel audio connector/jumper block J8A1
B BIOS Setup configuration jumper block J9H2
Figure 6. Location of the Jumper Blocks
2.3.1 FRONT PANEL AUDIO CONNECTOR/JUMPER BLOCK
This connector has two functions:
• With jumpers installed, the audio line out signals are routed to the back panel
audio line out connector.
• With jumpers removed, the connector provides audio line out and mic in
signals for front panel audio connectors.

Specification Update for IntelDesktop Boards Using the Intel845GL Chipset
14
Table 18 describes the two configurations of this connector/jumper block.
CAUTION
Do not place jumpers on this block in any configuration other than the one
described in Table 18. Other jumper configurations are not supported and could
damage the Desktop Board.
Table 18. Front Panel Audio Connector/Jumper Block
Jumper Setting Configuration
1
34
6
9
7
5
2
10
5 and 6
9 and 10
Audio line out signals are routed to the back panel
audio line out connector.
1
34
6
9
7
5
2
10
No jumpers
installed
Audio line out and mic in signals are available for front
panel audio connectors.
# INTEGRATOR’S NOTE
When the jumpers are removed and this connector is used for front panel audio,
the back panel audio line out and mic in connectors are disabled.
2.3.2 BIOS SETUP CONFIGURATION JUMPER BLOCK
The 3-pin jumper block determines the BIOS Setup program’s mode. Table 18A describes the jumper
settings for the three modes: normal, configure, and recovery. When the jumper is set to configuration mode
and the computer is powered-up, the BIOS compares the processor version and the microcode version in the
BIOS and reports if the two match.