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Intel Desktop Board D915GAV/D915GAG Technical Product Specification NOTE Most of the illustrations in this document show only the Desktop Board D915GAV. When there are significant differences between the two Desktop Boards, illustrations of both boards are provided. 1.3 Overview 1.3.1 Feature Summary Table 2 summarizes the major features of the Desktop Boards D915GAV and D915GAG. Table 2. Feature Summary Form Factor Processor • D915GAV: ATX (12.00 inches by 9.60 inches [304.80 millimeters by 243.84 millimeters]) • D915GAG: microATX Form Factor (9.60 inches by 9.60 inches [243.84 millimeters by 243.84 millimeters]) Support for an Intel® Pentium® 4 processor in an LGA775 socket with an 800 or 533 MHz system bus Memory • Four DDR SDRAM Dual Inline Memory Module (DIMM) sockets • Support for DDR 400 MHz and DDR 333 MHz DIMMs • Support for up to 4 GB of system memory Chipset Video Audio Intel® 915G Chipset, consisting of: • Intel® 82915G Graphics Memory Controller Hub (GMCH) • Intel® 82801FB I/O Controller Hub (ICH6) • 4 Mbit Firmware Hub (FWH) Intel® GMA900 onboard graphics subsystem Intel® High Definition Audio subsystem using the Realtek ALC860 audio codec I/O Control LPC Bus I/O controller USB Peripheral Interfaces LAN Support BIOS Support for USB 2.0 devices • 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 • D915GAV: 10/100 Mbits/sec LAN subsystem using the Intel® 82562EZ Platform LAN Connect (PLC) device • D915GAG: Refer to Table 3 on page 13 for a description of LAN subsystem options. • Intel/AMI BIOS (resident in the 4 Mbit FWH) • Support for Advanced Configuration and Power Interface (ACPI), Plug and Play, and SMBIOS continued 12

Section	Page
Intel® Desktop Boards D915GAV/D915GAG Technical Product Specification	1
Revision History	2
Preface	3
Intended Audience	3
What This Document Contains	3
Typographical Conventions	3
Other Common Notations	4
Contents	5
1 Product Description	11
1.1 PCI Bus Terminology Change	11
1.2 Board Differences	11
1.3 Overview	12
1.3.1 Feature Summary	12
1.3.2 Manufacturing Options	13
1.3.3 Board Layouts	14
1.3.4 Block Diagram	18
1.4 Online Support	19
1.5 Processor	19
1.6 System Memory	20
1.6.1 Memory Configurations	22
1.7 Intel® 915G Chipset	26
1.7.1 Intel 915G Graphics Subsystem	26
1.7.2 USB	28
1.7.3 IDE Support	28
1.7.4 Real-Time Clock, CMOS SRAM, and Battery	30
1.8 PCI Express Connectors	30
1.9 I/O Controller	31
1.9.1 Serial Ports	31
1.9.2 Parallel Port	31
1.9.3 Diskette Drive Controller	32
1.9.4 Keyboard and Mouse Interface	32
1.10 Audio Subsystem	32
1.10.1 Audio Subsystem Software	33
1.10.2 Audio Connectors	33
1.10.3 Intel High Definition Audio Subsystem	34
1.11 LAN Subsystem	35
1.11.1 10/100 Mbits/sec LAN Subsystem	35
1.11.2 Gigabit LAN Subsystem	36
1.11.3 Alert Standard Format (ASF) Support	37
1.11.4 LAN Subsystem Software	38
1.12 Hardware Management Subsystem	38
1.12.1 Hardware Monitoring and Fan Control ASIC	38
1.12.2 Thermal Monitoring	39
1.12.3 Fan Monitoring	41
1.12.4 Chassis Intrusion and Detection	41
1.13 Power Management	41
1.13.1 ACPI	41
1.13.2 Hardware Support	44
1.14 Trusted Platform Module (Optional)	48
1.14.1 System Requirements	48
1.14.2 Warning of Potential Data Loss	48
1.14.3 Security Precautions	49
1.14.4 Trusted Platform Module Ownership	50
1.14.5 Enabling the Trusted Platform Module	51
1.14.6 Assuming Trusted Platform Module Ownership	51
1.14.7 Recovery Procedures	52
1.14.8 Clearing Trusted Platform Module Ownership	53
1.14.9 Software Support	54
2 Technical Reference	55
2.1 Introduction	55
2.2 Memory Resources	55
2.2.1 Addressable Memory	55
2.2.2 Memory Map	57
2.3 DMA Channels	57
2.4 Fixed I/O Map	58
2.5 PCI Configuration Space Map	59
2.6 Interrupts	60
2.7 PCI Conventional Interrupt Routing Map	61
2.8 Connectors	63
2.8.1 Back Panel Connectors	64
2.8.2 Component-side Connectors	66
2.9 Jumper Block	77
2.10 Mechanical Considerations	78
2.10.1 D915GAV Board Form Factor	78
2.10.2 D915GAG Board Form Factor	79
2.10.3 I/O Shield	80
2.11 Electrical Considerations	81
2.11.1 DC Loading	81
2.11.2 Add-in Board Considerations	81
2.11.3 Fan Connector Current Capability	82
2.11.4 Power Supply Considerations	82
2.12 Thermal Considerations	83
2.13 Reliability	85
2.14 Environmental	86
2.15 Regulatory Compliance	87
2.15.1 Safety Regulations	87
2.15.2 EMC Regulations	87
2.15.3 European Union Declaration of Conformity Statement	88
2.15.4 Product Ecology Statements	89
2.15.5 Product Certification Markings (Board Level)	90
3 Overview of BIOS Features	91
3.1 Introduction	91
3.2 BIOS Flash Memory Organization	92
3.3 Resource Configuration	92
3.3.1 PCI Autoconfiguration	92
3.3.2 PCI IDE Support	92
3.4 System Management BIOS (SMBIOS)	93
3.5 Legacy USB Support	93
3.6 BIOS Updates	94
3.6.1 Language Support	94
3.6.2 Custom Splash Screen	94
3.7 Boot Options	95
3.7.1 CD-ROM Boot	95
3.7.2 Network Boot	95
3.7.3 Booting Without Attached Devices	95
3.7.4 Changing the Default Boot Device During POST	95
3.8 Fast Booting Systems with Intel Rapid BIOS Boot	96
3.8.1 Peripheral Selection and Configuration	96
3.8.2 Intel Rapid BIOS Boot	96
3.9 BIOS Security Features	97
4 Error Messages and Beep Codes	99
4.1 BIOS Error Messages	99
4.2 Port 80h POST Codes	101
4.3 Bus Initialization Checkpoints	105
4.4 Speaker	106

Match case Limit results 1 per page

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

NOTE

Most of the illustrations in this document show only the Desktop Board D915GAV.

When there are

significant differences between the two Desktop Boards, illustrations of both boards are provided.

1.3

Overview

1.3.1

Feature Summary

Table 2 summarizes the major features of the Desktop Boards D915GAV and D915GAG.

Table 2.

Feature Summary

Form Factor

•

D915GAV:

ATX (12.00 inches by 9.60 inches [304.80 millimeters by

243.84 millimeters])

•

D915GAG:

microATX Form Factor (9.60 inches by 9.60 inches [243.84

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

•

Four DDR SDRAM Dual Inline Memory Module (DIMM) sockets

•

Support for DDR 400 MHz and DDR 333 MHz DIMMs

•

Support for up to 4 GB of system memory

Chipset

Intel

915G Chipset, consisting of:

•

Intel

82915G Graphics Memory Controller Hub (GMCH)

•

Intel

82801FB I/O Controller Hub (ICH6)

•

4 Mbit Firmware Hub (FWH)

Video

Intel

GMA900 onboard graphics subsystem

Audio

Intel

High Definition Audio subsystem using the Realtek ALC860 audio codec

I/O Control

LPC Bus I/O controller

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

•

D915GAV:

10/100 Mbits/sec LAN subsystem using the Intel

82562EZ Platform

LAN Connect (PLC) device

•

D915GAG:

Refer to Table 3 on page 13 for a description of LAN subsystem

options.

BIOS

•

Intel/AMI BIOS (resident in the 4 Mbit FWH)

•

Support for Advanced Configuration and Power Interface (ACPI), Plug and Play,

and SMBIOS

continued