Intel D915GAG Product Specification - Page 92

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

92

Table 46 lists the BIOS Setup program menu features.

Table 46.

BIOS Setup Program Menu Bar

Maintenance

Main

Advanced

Security

Power

Boot

Exit

Clears

passwords and

displays

processor

information

Displays

processor

and memory

configuration

Configures

advanced

features

available

through the

chipset

Sets

passwords

and security

features

Configures

power

management

features and

power supply

controls

Selects boot

options

Saves or

discards

changes to

Setup

program

options

Table 47 lists the function keys available for menu screens.

Table 47.

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

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

Intel D915GAG Product Specification - Page 92

BIOS Flash Memory Organization, Resource Configuration

Page 92 highlights