D915GAV INTEL | Alldatasheet

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Technical content

Datasheet sections

  • 1 Product Description
  • 1.1 PCI Bus Terminology Change
  • 1.2 Board Differences
  • 1.3 Overview
  • 1.3.1 Feature Summary
  • 1.3.2 Manufacturing Options
  • 1.3.3 Board Layouts
  • 1.3.4 Block Diagram
  • 1.4 Online Support
  • 1.6 System Memory
  • 1.6.1 Memory Configurations
  • 1.7 Intel® 915G Chipset
  • 1.7.1 Intel 915G Graphics Subsystem
  • 1.7.2 USB
  • 1.7.3 IDE Support
  • 1.7.4 Real-Time Clock, CMOS SRAM, and Battery
  • 1.8 PCI Express Connectors
  • 1.9.1 Serial Ports
  • 1.9.2 Parallel Port
  • 1.9.3 Diskette Drive Controller
  • 1.9.4 Keyboard and Mouse Interface
  • 1.10 Audio Subsystem
  • 1.10.1 Audio Subsystem Software
  • 1.10.2 Audio Connectors
  • 1.10.3 Intel® High Definition Audio Subsystem
  • 1.11 LAN Subsystem
  • 1.11.2 Gigabit LAN Subsystem
  • 1.11.3 Alert Standard Format (ASF) Support
  • 1.11.4 LAN Subsystem Software
  • 1.12 Hardware Management Subsystem
  • 1.12.1 Hardware Monitoring and Fan Control ASIC
  • 1.12.2 Thermal Monitoring
  • 1.12.3 Fan Monitoring
  • 1.12.4 Chassis Intrusion and Detection
  • 1.13 Power Management
  • 1.13.1 ACPI
  • 1.13.2 Hardware Support
  • 1.14 Trusted Platform Module (Optional)
  • 1.14.1 System Requirements
  • 1.14.2 Warning of Potential Data Loss
  • 1.14.3 Security Precautions

Datasheet sections

  • 3.6 BIOS Updates
  • 3.6.1 Language Support
  • 3.6.2 Custom Splash Screen
  • 3.7 Boot Options
  • 3.7.1 CD-ROM Boot
  • 3.7.2 Network Boot
  • 3.7.3 Booting Without Attached Devices
  • 3.7.4 Changing the Default Boot Device During POST
  • 3.8 Fast Booting Systems with Intel® Rapid BIOS Boot
  • 3.8.1 Peripheral Selection and Configuration
  • 3.8.2 Intel Rapid BIOS Boot
  • 3.9 BIOS Security Features
  • 4 Error Messages and Beep Codes
  • 4.1 BIOS Error Messages
  • 4.2 Port 80h POST Codes
  • 4.3 Bus Initialization Checkpoints
  • 4.5 BIOS Beep Codes

Datasheet sections

Order Number: C68600-002 The Intel® Desktop Board D915GAV/D915GAG 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 D915GAV/D915GAG Specification Update. Intel® Desktop Boards D915GAV/D915GAG Technical Product Specification

Revision History

Revision Revision History Date -001 First release of the Intel ® Desktop Board D915GAV/D915GAG Technical Product Specification. June 2004 -002 Second release of the Intel De sktop Board D915GAV/D915GAG Technical Product Specification. December 2004 This product specification applies to only standard Intel Desktop Boards D915GAV and D915GAV with BIOS identifier EV91510A.86A. Changes to this specification will be published in the Intel Desktop Board D915GAV/D915GAG Specification Update before being incorporated into a revision of this document. INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. INTEL PRODUCTS ARE NOT INTENDED FOR USE IN MEDICAL, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS. Intel Corporation may have patents or pending patent applications, trademarks, copyrights, or other intellectual property rights that relate to the presented subject matter. The furnishing of documents and other materials and information does not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other intellectual property rights. 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. Intel ® desktop boards 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: Intel Corporation P.O. Box 5937 Denver, CO 80217-9808 or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777, Germany 44-0-1793-421-333, ot her Countries 708-296-9333. Intel, Pentium, and Celeron are registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries. * Other names and brands may be claimed as the property of others.

This Technical Product Specification (TPS) specifies the board layout, components, connectors, power and environmental requirements, and the BIOS for these Intel® Desktop Boards: D915GAV and D915GAG. It describes the standard product and available manufacturing options. Intended Audience The TPS is intended to provide detailed, technical information about the Desktop Boards D915GAV and D915GAG and their 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 Description

1 A description of the hardware us ed on the Desktop Boards D915GAV and

2 A map of the resources of the Desktop Boards

3 The features supported by the BIOS Setup program

4 A description of the BIOS error me ssages, beep codes, and POST codes

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.

Intel Desktop Board D915GAV/D915GAG Technical Product Specification iv WARNING Warnings indicate conditions, which if not observed, can cause personal injury. Other Common Notation # 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 Desktop Boards D915GAV and D915GAG, 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 lo wercase 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.

Intel Desktop Board D915GAV/D915GAG Technical Product Specification vi

2 Technical Reference

3 Overview of BIOS Features

Intel Desktop Board D915GAV/D915GAG Technical Product Specification viii Tables

Intel Desktop Board D915GAV/D915GAG Technical Product Specification x

1 Product Description

1.1 PCI Bus Terminology Change

Previous generations of Intel® Desktop Boards used an add-in card connector referred to as PCI. This generation of Intel Desktop Boards adds a new technology for add-in cards: PCI Express. The 32-bit parallel bus previously referred to as PCI is now called PCI Conventional.

1.2 Board Differences

are identical with the exception of the items listed in Table 1. Table 1. Summary of Board Differences

  • Gigabit (10/100/1000 Mbits/sec) LAN subsystem
  • 10/100 Mbits/sec LAN subsystem
  • No LAN subsystem

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

  • 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

  • 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

Table 2. Feature Summary (continued)

  • PCI Conventional bus connectors (four on the D915GAV; two on the D915GAG)
  • PCI Express x1 bus add-in card connectors (two on the D915GAV; one on the D915GAG)
  • One PCI Express x16 bus add-in card connector (both boards) 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

1.3.2 Manufacturing Options

Table 3 describes the manufacturing options on the Desktop Boards D915GAV and D915GAG. representative to determine which manufacturing options are available to you. Table 3. Manufacturing Options

  • Gigabit (10/100/1000 Mbits/sec) LAN subsystem using the Marvel* Yukon* 88E8050 PCI Express Gigabit Ethernet Controller
  • 10/100 Mbits/sec LAN subsystem using the Intel® 82562EZ Platform LAN Connect (PLC) device
  • No LAN subsystem SCSI Hard Drive Activity LED Connector Allows add-in hard drive controllers (SCSI or other) to use the same LED as the onboard IDE controller. Serial Port B Second serial port accessible via a connector on the component side of the board S/PDIF Connector A 1 x 3 connector (mounted on the component side of the board) that provides digital audio signals in S/PDIF format Trusted Platform Module (TPM) A component that enhances platform security For information about Refer to Available configurations for the Desktop Boards D915GAV and D915GAG Section 1.4, page 19

1.3.3 Board Layouts

Figure 1 shows the location of the major components on the Desktop Board D915GAV. Figure 1. D915GAV Board Components Table 4 lists the components identified in Figure 1.

Table 4. D915GAV Board Components Shown in Figure 1

Description

C PCI Express x1 bus add-in card connectors D ATAPI CD-ROM connector (optional) E S/PDIF connector (optional) F Realtek ALC860 audio codec G Front panel audio connector H PCI Conventional bus add-in card connectors I Ethernet PLC device (optional) J PCI Express x16 bus add-in card connector K Rear chassis fan connector 1 L Back panel connectors M Alternate power connector N +12V power connector (ATX12V) O LGA775 processor socket P Processor fan connector Q Intel 82915G GMCH R DIMM Channel A sockets S Serial port B connector (optional) T DIMM Channel B sockets U SCSI LED (optional) V I/O controller W Power connector X Diskette drive connector Y Parallel ATE IDE connector Z Battery AA Chassis intrusion connector BB BIOS Setup configuration jumper block CC 4 Mbit Firmware Hub (FWH) DD Front chassis fan connector EE Serial ATA connectors FF Auxiliary front panel power LED connector GG Front panel connector HH ATX fan connector (optional) II Front panel USB connector JJ Intel 82801FB I/O Controller Hub (ICH6) KK Front panel IEEE-1394a connectors (optional) LL IEEE-1394a controller (optional) MM PCI Conventional bus add-in card connectors

Table 5. D915GAG Board Components Shown in Figure 2 A ATAPI CD-ROM connector (optional) B PCI Express x1 bus add-in card connectors C Realtek ALC860 audio codec D S/PDIF connector (optional) E Front panel audio connector F PCI Conventional bus add-in card connectors G Ethernet PLC device (optional) H PCI Express x16 bus add-in card connector I Rear chassis fan connector J Back panel connectors K Alternate power connector L +12V power connector (ATX12V) M LGA775 processor socket N Hardware monitoring and fan control ASIC O Processor fan connector P Intel 82915G GMCH Q DIMM Channel A sockets R Serial port B connector (optional) S DIMM Channel B sockets T SCSI LED connector (optional) U I/O controller V Power connector W Diskette drive connector X Parallel ATE IDE connector Y Battery Z Chassis intrusion connector AA BIOS Setup configuration jumper block BB 4 Mbit Firmware Hub (FWH) CC Front chassis fan connector DD Serial ATA connectors EE Auxiliary front panel power LED connector FF Front panel connector GG Front panel USB connector HH Intel 82801FB I/O Controller Hub (ICH6) II Front panel IEEE-1394a connectors (optional) JJ IEEE-1394a controller (optional) KK Speaker

1.3.4 Block Diagram

Figure 3 is a block diagram of the major functional areas of the boards.

4 Mbit

Figure 3. Block Diagram

1.4 Online Support

To find information about… Visit this World Wide Web site: Intel Desktop Boards D915GAV and D915GAG 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 D915GAV http://developer.intel.com/design/motherbd/av/av_available.htm Available configurations for the Desktop Board D915GAG http://developer.intel.com/design/motherbd/ag/ag_available.htm Processor data sheets http://www.intel.com/design/litcentr ICH6 addressing http://developer.intel.com/design/chipsets/datashts 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

1.5 Processor

The boards are 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 D915GAV board http://www.intel.com/design/motherbd/av/av_proc.htm Supported processors for the D915GAG board http://www.intel.com/design/motherbd/ag/ag_proc.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 6 on page 20 for a list of supported system bus frequency and memory speed combinations. For information about Refer to Power supply connectors Section 2.8.2.2, page 72

1.6 System Memory

  • 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.
  • 4 GB maximum total system memory. Refer to Section 2.2.1 on page 55 for information on the total amount of addressable memory.
  • Minimum total system memory: 128 MB
  • Non-ECC DIMMs
  • Serial Presence Detect
  • DDR 400 MHz and DDR 333 MHz SDRAM DIMMs Table 6 lists the supported system bus frequency and memory speed combinations.

Table 6. Supported System Bus Frequency and Memory Speed Combinations system latencies to optimize system throughput.

  • Remove the PCI Express x16 video card before installing or upgrading memory to avoid interference with the memory retention mechanism.
  • 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 7 lists the supported DIMM configurations. Table 7. Supported Memory Configurations

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 DS 512 Mbit 64 M x 8/64 M x 8 16

1024 MB SS 1 Gbit 128 M x 8/empty 8

2048 MB DS 1 Gbit 128 M x 8/128 M x 8 16

to single-sided memory modules (containing one row of SDRAM). information on available memory.

1.6.1 Memory Configurations

  • 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 4 illustrates the memory channel and DIMM configuration. NOTE The DIMM0 sockets of both channels are blue. The DIMM1 sockets of both channels are black. OM16667 Channel A, DIMM 0 Channel A, DIMM 1 Channel B, DIMM 0 Channel B, DIMM 1

Figure 4. Memory Channel and DIMM Configuration

1.6.1.1 Dual Channel (Interleaved) Mode Configurations

(blue) sockets of both channels are populated with identical DIMMs. Figure 5. Dual Channel (Interleaved) Mode Configuration with Two DIMMs Figure 6. Dual Channel (Interleaved) Mode Configuration with Three DIMMs

1.6.1.2 Single Channel (Asymmetric) Mode Configurations

Dual channel (Interleaved) mode configurations provide the highest memory throughput. (blue) socket of Channel A is populated. Channel B is not populated. Figure 8. Single Channel (Asymmetric) Mode Configuration with One DIMM DIMM0 (blue) socket of Channel B. Figure 9. Single Channel (Asymmetric) Mode Configuration with Three DIMMs

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

1.7 Intel® 915G Chipset

The Intel 915G chipset consists of the following devices:

  • Intel 82915G Graphics Memory Controller Hub (GMCH) with Direct Media Interface (DMI) interconnect
  • Intel 82801FB I/O Controller Hub (ICH6) with DMI interconnect
  • Firmware Hub (FWH) The GMCH 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 915G chipset http://developer.intel.com/ Resources used by the chipset Chapter 2

1.7.1 Intel 915G Graphics Subsystem

The Intel 915G chipset contains two separate, mutually exclusive graphics options. Either the GMA900 graphics controller (contained within the 82915G GMCH) is used, or a PCI Express x16 add-in card can be used. When a PCI Express x16 add-in card is installed, the GMA900 graphics controller is disabled.

1.7.1.1 Intel® GMA900 Graphics Controller

The Intel GMA900 graphics controller features the following:

  • Integrated graphics controller ⎯ 32 bpp (Bits Per Pixel) graphics engine ⎯ 333 MHz core frequency ⎯ 256-bit 2-D engine ⎯ 32-bit 3-D engine ⎯ Motion video acceleration ⎯ Pixel Shader 2.0 ⎯ 4-pixel pipes ⎯ DirectX* 9.0 Hardware Acceleration ⎯ Software Vertex Shader
  • Up to 2048 x 1536 at 75 Hz refresh
  • With Advanced Digital Display 2 (ADD2) card support flat panel displays up to 2048 x 1536 at

75 Hz or digital CRTs/HDTV displays at 1920 x 1080 at 85 Hz

  • High performance 3-D setup and render engine
  • High quality/performance texture engine
  • Display ⎯ Integrated 24-bit 400 MHz RAMDAC ⎯ DDC2B compliant interface
  • Video ⎯ Asynchronous dual monitor display with ADD2 card ⎯ Hardware motion compensation for software MPEG2 decode ⎯ Two multiplexed DVO port interfaces with 200 MHz pixel clocks using an ADD2 card
  • Dynamic Video Memory Technology (DVMT) support up to 224 MB
  • Intel® Zoom Utility For information about Refer to DVMT Section 1.7.1.2, page 27 Obtaining graphics software and utilities Section 1.4, page 19

1.7.1.2 Dynamic Video Memory Technology (DVMT)

DVMT enables enhanced graphics and memory performance through Direct AGP, and highly efficient memory utilization. DVMT ensures the most efficient use of available system memory for maximum 2-D/3-D graphics performance. Up to 224 MB of system memory can be allocated to DVMT on systems that have 512 MB or more of total system memory installed. Up to 128 MB can be allocated to DVMT on systems that have 256 MB but less than 512 MB of total installed system memory. Up to 64 MB can be allocated to DVMT when less than 256 MB of system memory is installed. DVMT returns system memory back to the operating system when the additional system memory is no longer required by the graphics subsystem. DVMT will always use a minimal fixed portion of system physical memory (as set in the BIOS Setup program) for compatibility with legacy applications. An example of this would be when using VGA graphics under DOS. Once loaded, the operating system and graphics drivers allocate additional system memory to the graphics buffer as needed for performing graphics functions. NOTE The use of DVMT requires operating system driver support.

1.7.1.3 Advanced Digital Display 2 (ADD2) Card Support

The GMCH routes two multiplexed DVO ports that are each capable of driving up to a 200 MHz pixel clock to the PCI Express x16 connector. The DVO ports can be paired for a dual channel configuration to support up to a 400 MHz pixel clock. When an ADD2 card is detected, the Intel GMA900 graphics controller is enabled and the PCI Express x16 connector is configured for DVO mode. DVO mode enables the DVO ports to be accessed by the ADD2 card. An ADD2 card can either be configured to support simultaneous display with the primary VGA display or can be configured to support dual independent display as an extended desktop configuration with different color depths and resolutions. ADD2 cards can be designed to support the following configurations:

  • TV-Out (composite video)
  • Transition Minimized Differential Signaling (TMDS) for DVI 1.0
  • Low Voltage Differential Signaling (LVDS)
  • Single device operating in dual channel mode
  • VGA output
  • HDTV output

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

1.7.1.4 Configuration Modes

A list of supported modes for the Intel GMA900 graphics controller is available as a downloadable document. For information about Refer to Supported modes for the D915GAV board http://www. intel.com/design/motherbd/av/av_prdoc.htm Supported modes for the D915GAG board http:// www.intel.com/design/motherbd/ag/ag_prdoc.htm

1.7.2 USB

The boards support 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 18, page 64 The location of the front panel USB connectors on the D915GAV board Figure 19, page 66 The location of the front panel USB connectors on the D915GAG board Figure 20, page 68

1.7.3 IDE Support

The boards provides five IDE interface connectors:

  • One parallel ATA IDE connector that supports two devices
  • Four serial ATA IDE connectors that support one device per connector

1.7.3.1 Parallel ATE 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.

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. The boards support Laser Servo (LS-120) diskette technology through the Parallel ATA IDE interfaces. An LS-120 drive can be configured as a boot device by setting the BIOS Setup program’s Boot menu to one of the following:

  • ARMD-FDD (ATAPI removable media device – floppy disk drive)
  • ARMD-HDD (ATAPI removable media device – hard disk drive) For information about Refer to The location of the Parallel ATA IDE connector on the D915GAV board Figure 19, page 66 The location of the Parallel ATA IDE connector on the D915GAG board Figure 20, page 68

1.7.3.2 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 on the D915GAV board Figure 19, page 66 The location of the Serial ATA IDE connectors on the D915GAG board Figure 20, page 68

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

1.7.3.3 SCSI Hard Drive Activity LED Connector (Optional)

The SCSI hard drive activity LED connector is a 1 x 2-pin connector that allows an add-in hard drive controller to use the same LED as the onboard IDE controller. For proper operation, this connector should be wired to the LED output of the add-in hard drive controller. The LED indicates when data is being read from, or written to, either the add-in hard drive controller or the onboard IDE controller (Parallel ATA or Serial ATA). For information about Refer to The location of the SCSI hard drive activity LED connector on the D915GAV board Figure 19, page 66 The location of the SCSI hard drive activity LED connector on the D915GAG board Figure 20, page 68 The signal names of the SCSI hard drive activity LED connector Table 27, page 71

1.7.4 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.

1.8 PCI Express Connectors

The boards provide 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:

  • 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

1.9 I/O Controller

The I/O controller provides the following features:

  • Two serial ports (Serial Port B is optional)
  • 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 I/O controller.

1.9.1 Serial Ports

The Desktop Board can support up to two serial port connectors. Serial port A is located on the back panel. Serial port B (optional) is accessible using a connector on the component side of board. The serial ports support 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 18, page 64 The location of the serial port B connector on the D915GAV board Figure 19, page 66 The location of the serial port B connector on the D915GAG board Figure 20, page 68 The signal names of the serial port B connector Table 25, page 70

1.9.2 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 18, page 64

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

1.9.3 Diskette Drive Controller

The 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 on the D915GAV board Figure 19, page 66 The location of the diskette drive connector on the D915GAG board Figure 20, page 68

1.9.4 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 18, page 64

1.10 Audio Subsystem

The boards support the Intel High Definition audio subsystem based on the Realtek ALC860 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.

1.10.1 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 1.4, page 19

1.10.2 Audio Connectors

The boards contain audio connector on both the back panel and the component side of the board. The component-side audio connectors include the following:

  • Front panel audio (a 2 x 5-pin connector that provides mic in and line out signals for front panel audio connectors)
  • ATAPI CD-ROM (an optional 1 x 4-pin ATAPI-style connector for connecting an internal ATAPI CD-ROM drive to the audio mixer)
  • S/PDIF (an optional 1 x 3 connector that provides S/PDIF output signals) The functions of the back panel audio connectors are dependent on which subsystem is present. For information about Refer to The location of the front panel audio connector, the optional ATAPI CD-ROM connector, and the optional S/PDIF connector on the D915GAV board Figure 19, page 66 The location of the front panel audio connector, the optional ATAPI CD-ROM connector, and the optional S/PDIF connector on the D915GAG board Figure 20, page 68 The signal names of the front panel audio connector Table 24, page 70 The signal names of the optional ATAPI CD-ROM connector Table 23, page 70 The signal names of the optional S/PDIF connector Table 22, page 70

1.10.3 Intel® High Definition Audio Subsystem

  • Intel 82801FB I/O Controller Hub (ICH6)
  • Realtek ALC860 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 10. Back Panel Audio Connectors Line In/ Retasking Jack C Line Out/ Retasking Jack D Mic In/ Retasking Jack B OM16989 Mic In/ Retasking Jack E [Port 1] Front Panel Audio Connectors Line Out/ Retasking Jack F [Port 2]

Figure 10. Front/Back Panel Audio Connector Options for High Definition Audio Subsystem Figure 11 is a block diagram of the High Definition audio subsystem. Figure 11. High Definition Audio Subsystem Block Diagram

1.11 LAN Subsystem

The D915GAV board provides a 10/100 Mbits/sec LAN subsystem. The D915GAG board supports a manufacturing option for one of the following:

  • Gigabit (10/100/1000 Mbits/sec) LAN subsystem
  • 10/100 Mbits/sec LAN subsystem
  • No LAN subsystem The LAN subsystem consists of the following:
  • Physical layer interface device. As a manufacturing option, the board includes one of the following Platform LAN Connect (PLC) devices: ⎯ Intel® 82562EZ PLC for 10/100 Mbits/sec Ethernet LAN connectivity ⎯ Marvel Yukon 88E50 for Gigabit (10/100/1000 Mbits/sec) Ethernet LAN connectivity (D915GAG board only)
  • 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 82562EZ
  • PCI Conventional bus power management ⎯ Supports ACPI technology ⎯ Supports LAN wake capabilities 1.11.1 10/100 Mbits/sec LAN Subsystem The 10/100 Mbits/sec LAN subsystem includes the ICH6, the Intel 82562EZ PLC, and an RJ-45 LAN connector with integrated status LEDs.

1.11.1.1 Intel® 82562EZ Physical Layer Interface Device

The Intel 82562EZ provides the following functions:

  • Basic 10/100 Ethernet LAN connectivity
  • Full device driver compatibility
  • Programmable transit threshold
  • Configuration EEPROM that contains the MAC address

1.11.1.2 RJ-45 LAN Connector with Integrated LEDs

Two LEDs are built into the RJ-45 LAN connector (shown in Figure 12). Figure 12. LAN Connector LED Locations Table 8. LAN Connector LED States Off LAN link is not established. Blinking LAN activity is occurring.

1.11.2 Gigabit LAN Subsystem

RJ-45 LAN connector with integrated status LEDs. The Gigabit LAN subsystem is a manufacturing option available only with the D915GAG board.

  • x1 PCI Express link
  • Basic 10/100/1000 Ethernet LAN connectivity
  • IEEE 802.1p and 802.1q support
  • 10/100/1000 IEEE 802.3 compliant
  • Compliant to 802.3x flow control support
  • Jumbo frame support
  • TCP, IP, UDP checksum offload
  • Automatic MDI/MDIX crossover
  • Full device driver compatibility
  • Configuration EEPROMs that contain the MAC address and ASF 2.0 support
  • Wake On LAN technology power management support
  • PCI Express Active State Power Management Support (L0s)
  • ASF 2.0 support

1.11.2.2 RJ-45 LAN Connector with Integrated LEDs

LED states when the board is powered up and the Gigabit LAN subsystem is operating. Figure 13. LAN Connector LED Locations Table 9. LAN Connector LED States Off LAN link is not established. Blinking LAN activity is occurring. N/A Off 10 Mbits/sec data rate is selected. Yellow On 1000 Mbits/sec data rate is selected.

1.11.3 Alert Standard Format (ASF) Support

  • Monitoring of system firmware progress events, including: ⎯ BIOS present ⎯ Primary processor initialization ⎯ Memory initialization ⎯ Video initialization ⎯ PCI resource configuration ⎯ Hard-disk initialization ⎯ User authentication ⎯ Starting operating system boot process
  • Monitoring of system firmware error events, including: ⎯ Memory missing ⎯ Memory failure ⎯ No video device ⎯ Keyboard failure ⎯ Hard-disk failure ⎯ No boot media
  • Boot options to boot from different types of boot devices
  • Reset, shutdown, power cycle, and power up options

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

1.11.4 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 1.4, page 19

1.12 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:

  • Fan monitoring and control (through the hardware monitoring and fan control ASIC)
  • Thermal and voltage monitoring
  • Chassis intrusion detection

1.12.1 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 on the D915GAV board Figure 14, page 39 The location of the fan connectors and sensors for thermal monitoring on the D915GAG board Figure 15, page 40

1.12.2 Thermal Monitoring

Figure 14 shows the location of the sensors and fan connectors for the D915GAV board. Figure 14. Thermal Monitoring for D915GAV Board

1.12.3 Fan Monitoring

Fan monitoring can be implemented using Intel® Desktop Utilities, LANDesk* software, 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 1.13.2.2, page 45

1.12.4 Chassis Intrusion and Detection

The 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.

1.13 Power Management

Power management is implemented at several levels, including:

  • 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

1.13.1 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 these boards 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 12 on page 44)
  • Support for a front panel power and sleep mode switch

ACPI is configured with an ACPI-aware operating system. Table 10. Effects of Pressing the Power Switch

1.13.1.1 System States and Power States

system as a whole into a low-power state.

Table 11. Power States and Targeted System Power

  1. Total system power is dependent on the system confi guration, including add-in boards and peripherals powered

by the system chassis’ power supply.

  1. Dependent on the standby power consumption of wake-up devices used in the system.

1.13.1.2 Wake-up Devices and Events

Table 12 lists the devices or specific events that can wake the computer from specific states. Table 12. Wake-up Devices and Events will enable a wake-up event from LAN in the S5 state.

1.13.2 Hardware Support

  • 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.

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.

1.13.2.1 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 on the D915GAV board Figure 19, page 66 The location of the main power connector on the D915GAG board Figure 20, page 68 The signal names of the main power connector Table 31, page 72

1.13.2.2 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 on the D915GAV board Figure 19, page 66 The location of the fan connectors on the D915GAG board Figure 20, page 68 The location of the fan connectors and sensors for thermal monitoring on the D915GAV board Figure 14, page 39 The location of the fan connectors and sensors for thermal monitoring on the D915GAG board Figure 15, page 40 The signal names of the processor fan connector Table 29, page 71 The signal names of the chassis fan connectors Table 30, page 71

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

1.13.2.3 LAN Wake Capabilities

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 Magic Packet* frame, the LAN subsystem asserts a wake-up signal that powers up the computer. Depending on the LAN implementation, the boards support LAN wake capabilities with ACPI in the following ways:

  • The PCI Express WAKE# signal
  • The PCI Conventional bus PME# signal for PCI 2.2 compliant LAN designs
  • The onboard LAN subsystem

1.13.2.4 Instantly Available PC Technology

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 boards 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 12 on page 44 lists the devices and events that can wake the computer from the S3 state. The boards support 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.

1.13.2.5 Resume on Ring

The operation of Resume on Ring can be summarized as follows:

  • 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

1.13.2.6 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.

1.13.2.7 Wake from PS/2 Devices

PS/2 device activity wakes the computer from an ACPI S1 or S3 state.

1.13.2.8 PME# Signal Wake-up Support

S1, S3, S4, or S5 state (with Wake on PME enabled in BIOS).

1.13.2.9 WAKE# Signal Wake-up Support

D915GAV board. The LED is in the same location on the D915GAG board. damage the board and any attached devices. Figure 16. Location of the Standby Power Indicator LED

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

1.14 Trusted Platform Module (Optional)

The optional Trusted Platform Module (TPM) is a component on the desktop board that is specifically designed to enhance platform security above-and-beyond the capabilities of today’s software by providing a protected space for key operations and other security critical tasks. Using both hardware and software, the TPM protects encryption and signature keys at their most vulnerable stages—operations when the keys are be ing used unencrypted in plain-text form. The TPM is specifically designed to shield unencrypted keys and platform authentication information from software-based attacks.

1.14.1 System Requirements

  • Intel Desktop Board D915GAV or D915GAG
  • Microsoft Windows 2000 Professional (SP4) or Microsoft Windows XP Professional (SP1)
  • NTFS file system required
  • Microsoft Internet Explorer* 5.5 or later
  • Adobe* Acrobat* 5.0 or later

1.14.2 Warning of Potential Data Loss

Failure to follow the instructions below may cause you to lose data. Read and follow these instructions prior to Trusted Platform Module initialization. System integrators, owners, and end users must take precautions to mitigate the chance of data loss. Data encrypted by any program utilizing the Trusted Platform Module (TPM) may become inaccessible or unrecoverable if any of the following occurs:

  • Lost Password: Loss of any of the passwords associated with the TPM will render encrypted data inaccessible. No password recovery is available. Read the Security Precautions for Password Procedures.
  • Hard Drive Failure: In the event of a failure of a hard disk (or other storage media) that contains encrypted data, an image of the hard disk (or other storage media) must be restored from backup before access to encrypted data may become available. The owner/user should backup the system hard disk on a regular basis. Read the Security Precautions below for Hard Drive Backup Procedures.
  • Platform Failure: In the event of a platform failure and/or replacement of the motherboard, recovery procedures may allow migratable keys to be recovered and may restore access to encrypted data. All non-migratable keys and their associated data will be lost. Both the Infineon* Security Platform software and Wave Systems* EMBASSY* Trust Suite utilize migratable keys. Please check any other software that accesses the TPM for migratability. Read the Security Precautions for Emergency Recovery File Back Up Procedures.
  • Loss of Trusted Platform Module Ownership: Trusted Platform Module Ownership/contents may be cleared (via a BIOS switch) to allow for the transfer of a system to a new owner. If TPM ownership is cleared, either intentionally or in error, recovery procedures may allow the migratable keys to be recovered and may restore access to encrypted data. Read the Security Precautions for Emergency Recovery File Back Up Procedures.

1.14.3 Security Precautions

Security, like any other aspect of computer maintenance requires planning. What is unique about security has to do with understanding who "friends" and adversaries are. The TPM provides mechanisms to enable the owner/user to protect their information from adversaries. To provide this protection the TPM effectively puts "locks" around the data. Just like physical locks, if keys or combinations are lost, the assets (i.e., data) may be inaccessible not only to adversaries, but also to asset owner/user. The TPM provides two classes of keys: migratable and non-migratable. Migratable keys are designed to protect data that can be used (i.e., unencrypted) on more than one platform. This has the advantage of allowing the key data to be replicated (backed-up and restored) to another platform. This may be because of user convenience (someone uses more than one platform, or the data needs to be available to more than one person operating on different platforms). This type of key also has the advantage in that it can be backed-up and restored from a defective platform onto a new platform. However, migratable keys may not be the appropriate level of protection (e.g., the user wants the data restricted to a single platform) needed for the application. This requires a non- migratable key. Non-migratable keys carry with them a usage deficit in that while the key may be backed-up and restored (i.e., protected from hard disk failure) they are not protected against system or TPM failure. The very nature of a non-migratable key is that they can be used on one and only one TPM. In the event of a system or TPM failure, all non-migratable keys and the data associated with them will be inaccessible and unrecoverable. CAUTION The following precautions and procedures may assist in recovering from any of the previously listed situations. Failure to implement these security precautions and procedures may result in unrecoverable data loss.

1.14.3.1 Password Procedures

The Infineon Security Platform software allows users to configure passwords from 6 to 255 characters. A good password should consist of:

  • At least one upper case letter (A to Z)
  • At least one numerical character (0 to 9)
  • At least one symbol character (!, @, &, etc.) Example Passwords: “I wear a Brown hat 2 worK @ least once-a-month” or “uJGFak&%)adf35a9m” NOTE Avoid using names or dates that can be easily guessed such as: birthdays, anniversaries, family member names, pet names, etc. All passwords associated with the Infineon Security Platform software (Owner, Emergency Recovery Token, and User passwords) and the Wave Systems EMBASSY Trust Suite are NOT RECOVERABLE and cannot be reset without the original text. The system owner should document all passwords, store them in a secured location (vault, safe deposit box, off-site storage, etc.), and have them available for future use. These documents should be updated after any password changes.

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

1.14.3.2 Emergency Recovery File Back Up Procedures

The Emergency Recovery Token (SPEmRecToken.xml) must be saved or moved to a removable media (floppy, USB drive, CDR, flash media, etc). Once this is done, the removable media should be stored in a secure location. DO NOT LEAVE ANY COPIES of the Emergency Recovery Token on the hard drive or within any hard drive image backups. If a copy of the Emergency Recovery Token remains on the system, it could be used to compromise the Trusted Platform Module and platform. After completing the Infineon Security Platform User Initialization Wizard, a copy of the Emergency Recovery Archive (SPEmRecArchive.xml) should be copied to a removable media and stored in a secure location. This procedure should be repeated after any password changes or the addition of a new user.

1.14.3.3 Hard Drive Image Backup Procedures

To allow for emergency recovery from a hard drive failure, frequent images of the hard drive should be created and stored in a secure location. In the event of a hard drive failure, the latest image can be restored to a new hard drive and access to the encrypted data may be re-established. NOTE All encrypted and unencrypted data that was added after the last image was created will be lost.

1.14.3.4 Clear Text Backup (Optional)

It is recommended that system owners follow the Hard Drive Image Backup Procedures. To backup select files without creating a drive image, files can be moved from secured programs or drive letters to an unencrypted directory. The unencrypted (clear text) files may then be backed up to a removable media and stored in a secure location. The advantage of the clear text backup is that no TPM key is required to restore the data. This option is not recommended because the data is exposed during backup and restore.

1.14.4 Trusted Platform Module Ownership

The Trusted Platform Module is disabled by default when shipped and the owner/end customer of the system assumes “ownership” of the TPM. This permits the owner of the system to control initialization of the TPM and create all the passwords associated with the TPM that is used to protect their keys and data. System builders/integrators may install both the Infineon Security Platform software and the Wave System EMBASSY Trust Suite, but SHOULD NOT attempt to use or activate the TPM or either software package.

1.14.5 Enabling the Trusted Platform Module

The Trusted Platform Module is disabled by default when shipped to insure that the owner/end customer of the system initializes the TPM and configures all security passwords. The owner/end customer should use the following steps to enable the TPM. 1. While the PC is displaying the splash screen (or POST screen), press the <F2> key to enter BIOS. 2. Use the arrow keys to go to the Advanced Menu, select Peripheral Configuration, and then press the <Enter> key. 3. Select the Trusted Platform Module, press <Enter>, and select Enabled and press <Enter> again (display should show: Trusted Platform Module [Enabled]). 4. Press the <F10> key, select Ok and press <Enter>. 5. System should reboot and start Microsoft Windows.

1.14.6 Assuming Trusted Platform Module Ownership

Once the TPM has been enabled, ownership must be assumed by using the Infineon Security Platform Software. The owner/end user should follow the steps listed below to take ownership of the TPM: 1. Start the system. 2. Launch the Infineon Security Platform Initialization Wizard. 3. Create Owner password (before creating any password, review the Password Recommendations made earlier in this document). 4. Create a new Recovery Archive (note the file name and location). 5. Specify a Security Platform Emergency Recovery Token password and location. (this password should not match the Owner password or any other password). 6. Define where to save the Emergency Recovery Token (note the file location and name). 7. The software will then create recovery archive files and finalize ownership of the TPM. 8. After completing the Infineon Security Platform Initialization Wizard, the Emergency Recovery Token (SPEmRecToken.xml) must be moved to a removable media (floppy, CDR, flash media, etc) if the file was not saved to a removable media during installation. Once this is done, the removable media should be stored in a secure location. No copies of this Emergency Recovery Token file should remain on the system. If a copy remains on the system, it could be used to compromise the security of the platform. 9. Launch the Infineon Security Platform User Initialization Wizard. 10. Create a Basic User password (this password is the most frequently used and should not match any other password). 11. Select and configure Security Platform features for this user. 12. After completing the Infineon Security Platform User Initialization Wizard, a copy of the Emergency Recovery Archive (SPEmRecArchive.xml) should be copied to a removable media and stored in a secure location. This procedure should be repeated after any password changes or the addition of new users. 13. Restart the system. 14. To backup the keys for the EMBASSY Trust Suite, the Key Transfer Manager software must be configured. Launch the Key Transfer Manager from the program menu.

Intel Desktop Board D915GAV/D915GAG Technical Product Specification 15. Follow the instructions and create and document the locations for both the archive and restoration key files. The key archive should be located on a removable media and stored in a secure location when not in use. 16. Create and document the password to protect the key archive. 17. Provide the TPM Owner password to allow the Key Transfer Manager to create the archive and restoration key files. 18. Upon completing the configuration of the Key Transfer Manager, it will place an icon in the task bar and automatically back up all new and updated keys associated with the EMBASSY Trust Suite. If the removable media that contains the archive file is not present when a new key is generated, then keys will have to be manually backed up using the Key Transfer Manager when the removable media is available. 19. All passwords associated with the Infineon Security Platform Software (Owner, Emergency Recovery Token, and User passwords) and Wave Systems EMBASSY Trust Suite and Key Transfer Manager are not recoverable and cannot be reset without the original text. These passwords should be documented and stored in a secured location (vault, safe deposit box, off- site storage, etc.) in case they are needed in the future. These documents and files should be updated after any password changes.

1.14.7 Recovery Procedures

1.14.7.1 Recovering from Hard Disk Failure

Restore the latest hard drive image from backup to the new hard drive – no TPM specific recovery is necessary.

1.14.7.2 Recovering from Desktop Board or TPM Failure

This procedure may restore the migratable keys from the Emergency Recovery Archive, and does not restore any previous keys or content to the TPM. This recovery procedure may restore access to the Infineon Security Platform software and Wave Systems EMBASSY Trust Suite that are secured with migratable keys. Requirements:

  • Emergency Recovery Archive (created with the Infineon Security Platform Initiation Wizard)
  • Emergency Recovery Token (created with the Infineon Security Platform Initiation Wizard)
  • Emergency Recovery Token Security Password (created with the Infineon Security Platform Initiation Wizard)
  • Working original operating system (OS) installation, or a restored image of the hard drive
  • Wave Systems Key Transfer Manager archive password
  • TPM Ownership password This recovery procedure only restores the migratable keys from the previously created Recovery Archives. 1. Replace the desktop board with the same model as the failed board. 2. Start the original operating system or restore the original hard drive image. 3. Start the Infineon Security Platform Initialization Wizard and check the “I want to restore the existing Security Platform” box.
  1. Follow the instructions during the Security Platform Initialization, and append the Emergency Recovery Archive to the existing archive. 5. Provide all the necessary passwords, files, and file locations as requested. It may take up to 20 minutes for Security Platform Initialization Wizard to restore the security platform settings. 6. Start User Initialization Wizard. Select “Recover Your Basic User Key” when prompted. Specify the original Basic User Key password and proceed with the wizard. 7. When re-configuring the Personal Secure Drive, select “I want to change my Personal Secure Drive setting”, confirm the drive letter and name are correct, and then proceed through the rest of the wizard. 8. Restart the system when requested. 9. To restore access to the EMBASSY Trust Suite, right mouse click on the Key Transfer Manager icon located in the taskbar in the lower right corner of the screen, and select Restore TPM Keys. 10. Provide all the necessary passwords, files, and file locations as requested by the Key Transfer Manager. 11. Upon successful completion of all steps, you should be able to access previously encrypted files.

1.14.8 Clearing Trusted Platform Module Ownership

Disconnect the desktop board's power supply from its AC power source before you connect or disconnect cables, or install or remove any board components. Failure to do this can result in personal injury or equipment damage. Some circuitry on the desktop board can continue to operate even though the front panel power switch is off. CAUTION DATA ENCRYPTED BY ANY PROGRAM UTILIZING THE TPM WILL BECOME INACCESSIBLE IF TPM OWNERSHIP IS CLEARED. Recovery procedures may allow the migratable keys to be recovered and might restore access to encrypted data. (Review the Recovery Procedures for detailed instructions). The TPM may be cleared to transfer ownership of the platform to a new owner. 1. Observe precautions in the above WARNING then open the system case. 2. Move the configuration jumper on the board to pins 2-3. 3. Restore power to the PC and power on. 4. System should automatically enter BIOS setup. 5. Use the arrow keys to select Clear Trusted Platform Module, press <Enter>. 6. If you agree to the warning message select Ok and press <Enter>. 7. Press the <F10> key to save and exit, select Ok and press <Enter>. 8. Power off the system. 9. Review precautions in the WARNING above. 10. Restore the configuration jumper on the board to pins 1-2. When cleared, the TPM module is disabled by default.

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

1.14.9 Software Support

  • For assistance with the Infineon Security Platform Software, visit the web at: http://www.infineon.com
  • For assistance with the Wave System EMBASSY Trust Suite, visit the web at: http://www.wave.com/support/ets.html
  • For additional information about TPM and enhancing PC security, visit: https://www.trustedcomputinggroup.org/home

What This Chapter Contains

2.1 Introduction

Sections 2.2 - 2.6 contain several standalone tables. Table 13 describes the system memory map, Table 14 lists the DMA channels, Table 15 shows the I/O map, Table 16 defines the PCI Conventional bus configuration space map, and Table 17 describes the interrupts. The remaining sections in this chapter are introduced by text found with their respective section headings.

2.2 Memory Resources

2.2.1 Addressable Memory

The board utilizes 4 GB of addressable system memory. Typically the address space that is allocated for PCI Conventional bus add-in cards, PCI Express configuration space, BIOS (firmware hub), and chipset overhead resides above the top of DRAM (total system memory). On a system that has 4 GB of system memory installed, it is not possible to use all of the installed memory due to system address space being allocated for other system critical functions. These functions include the following:

  • BIOS/firmware hub (2 MB)
  • Local APIC (19 MB)
  • Digital Media Interface (40 MB)
  • Front side bus interrupts (17 MB)
  • PCI Express configuration space (256 MB)
  • MCH base address registers, internal graphics ranges, PCI Express ports (up to 512 MB)
  • Memory-mapped I/O that is dynamically allocated for PCI Conventional and PCI Express add- in cards The amount of installed memory that can be used will vary based on add-in cards and BIOS settings. Figure 17 shows a schematic of the system memory map. All installed system memory can be used when there is no overlap of system addresses. Upper BIOS area (64 KB) Lower BIOS area (64 KB;

16 KB x 4)

16 KB x 8)

Figure 17. Detailed System Memory Address Map

2.2.2 Memory Map

Table 13 lists the system memory map. Table 13. System Memory Map

1024 K - 4194304 K 100000 - FFFFFFFF 4095 MB Ex tended 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

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

512 K - 639 K 80000 - 9FBFF 127 KB Extended conventional memory

0 K - 512 K 00000 - 7FFFF 512 KB Conventional memory

2.3 DMA Channels

Table 14. DMA Channels

2.4 Fixed I/O Map

Table 15. I/O Map the ICH6 data sheet for dynamic addressing information.

  1. Default, but can be changed to another address range

sheet provides more information on address aliassing.

2.5 PCI Configuration Space Map

Table 16. PCI Configuration Space Map 00 00 00 Memory controller of Intel 82915G component 00 01 00 PCI Express x16 graphics port (Note 1) 00 02 00 Integrated graphics controller 00 02 01 Integrated graphics controller 00 1B 00 Intel High Definition Audio Controller 00 1C 00 PCI Express port 1 (PCI Express x1 bus connector 1) 00 1C 01 PCI Express port 2 (Gigabi t LAN controller, if present) 00 1C 02 PCI Express port 3 (PCI Express x1 bus connector 2) (Note 2) 00 1C 03 PCI Express port 4 (not used) 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 3) 00 00 PCI Conventional bus connector 1 (Note 3) 01 00 PCI Conventional bus connector 2 (Note 3) 02 00 PCI Conventional bus connector 3 (Note 2) (Note 3) 03 00 PCI Conventional bus connector 4 (Note 2) (Note 3) 08 00 Intel 82562EZ 10/100 Mbits/sec LAN PLC (if present) Notes: 1. Present only when a PCI Express x16 graphics card is installed. 2. Not present on the D915GAG board. 3. Bus number is dynamic and can change based on add-in cards used.

2.6 Interrupts

supported in Windows 2000 and Windows XP and supports a total of 24 interrupts. Table 17. Interrupts

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)

  1. Default, but can be changed to another IRQ.
  2. Available in APIC mode only.

2.7 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 18 shows an example of how the PIRQ signals are routed. For example, using Table 18 as a reference, assume an add-in card using INTA is plugged into PCI Conventional bus connector 3. In PCI bus connector 3, INTA is connected to PIRQB, which is already connected to the ICH6 audio controller. The add-in card in PCI Conventional bus connector 3 now shares an interrupt with the onboard interrupt source.

Table 18. PCI Interrupt Routing Map Note: Not present on the D915GAG board. lines to IRQ signals in APIC mode. PCI interrupt assignments to the USB ports, Serial ATA ports, and PCI Express ports are dynamic.

2.8 Connectors

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:

  • Back panel I/O connectors (see page 64)
  • Component-side I/O connectors (see page 65)

2.8.1 Back Panel Connectors

color-coded. The figure legend (Table 19) lists the colors used (when applicable). Figure 18. Back Panel Connectors Table 19 lists the back panel connectors identified in Figure 18. only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output.

Table 19. Back Panel Connectors Shown in Figure 18 A PS/2 mouse port (Green) B PS/2 keyboard port (Purple) C Parallel port (Burgundy) D Serial port A (Teal) E VGA port F Audio line in/Retasking Port C (Light blue) G Audio line out/Retasking Port D (Lime Green) H Mic in/Retasking Port B (Pink) I IEEE-1394a (optional) J USB ports (two) K LAN L USB ports (two) NOTE The D915GAG board supports a manufacturing option for no LAN subsystem. On D915GAG boards with no LAN subsystem, the back panel LAN connector is not present.

2.8.2 Component-side Connectors

Figure 19 shows the locations of the component-side connectors on the D915GAV board. Figure 19. D915GAV Board Component-side Connectors

Table 20 lists the component-side connectors identified in Figure 19. Table 20. Component-side Connectors Shown in Figure 19 A PCI Conventional bus add-in card connector 4 B Rear chassis fan connector 2 C PCI Conventional bus add-in card connector 3 D PCI Express x1 bus add-in card connector 2 E ATAPI CD-ROM connector (optional) F PCI Express x1 bus add-in card connector 1 G S/PDIF connector (optional) H Front panel audio connector I PCI Conventional bus add-in card connector 2 J Front panel IEEE-1394a connector (optional) K PCI Conventional bus add-in card connector 1 L Front panel IEEE-1394a connector (optional) M PCI Express x16 bus add-in card connector N Rear chassis fan connector 1 O Alternate power connector P +12V power connector (ATX12V) Q SCSI LED (optional) R Serial port B (optional) S Processor fan connector T Power connector U Diskette drive connector V Parallel ATA IDE connector W Chassis intrusion connector X Front chassis fan connector Y Serial ATA connector 1 Z Serial ATA connector 3 AA Serial ATA connector 2 BB Serial ATA connector 0 CC Auxiliary front panel power LED connector DD Front panel connector EE ATX fan connector (optional) FF Front panel USB connector GG Front panel USB connector

Table 21 lists the component-side connectors identified in Figure 20. Table 21. Component-side Connectors Shown in Figure 20 A S/PDIF connector (optional) B Front panel audio connector C PCI Conventional bus add-in card connector 2 D Front panel IEEE-1394a connector (optional) E PCI Conventional bus add-in card connector 1 F PCI Express x16 bus add-in card connector G Rear chassis fan connector H Alternate power connector I +12V power connector (ATX12V) J Processor fan connector K Serial port B (optional) L SCSI LED (optional) M Power connector N Diskette drive connector O Parallel ATA IDE connector P Chassis intrusion connector Q Front chassis fan connector R Serial ATA connector 1 S Serial ATA connector 3 T Serial ATA connector 2 U Serial ATA connector 0 V Auxiliary front panel power LED connector W Front panel connector X Front panel USB connector Y Front panel USB connector Z Front panel IEEE-1394a connector (optional) AA PCI Express x1 bus add-in card connector 1 BB ATAPI CD-ROM connector (optional)

Table 22. S/PDIF Connector (Optional)

2 S/PDIF Output

3 Ground

Table 23. ATAPI CD-ROM Connector (Optional)

1 Left audio input from CD-ROM

2 CD audio differential ground

3 CD audio differential ground

4 Right audio input from CD-ROM

Table 24. Front Panel Audio Connector

1 Port E [Port 1] Left Channel 2 Ground

3 Port E [Port 1] Right C hannel 4 Presence# (dongle present)

5 Port F [Port 2] Right Channel 6 Port E [Port 1] Sense return

7 Port E [Port 1] and Port F [Port 2]

8 Key

9 Port F [Port 2] Left Channel 10 Port F [Port 2] Sense return

The front panel audio connector is colored yellow. Table 25. Serial Port B Connector (optional)

1 DCD 2 RXD

3 TXD 4 DTR

5 Ground 6 DSR

7 RTS 8 CTS

9 RI 10 Not connected

Table 26. Chassis Intrusion Connector

1 Intruder

2 Ground

Table 27. SCSI Hard Drive Activity LED

1 SCSI_ACT#

2 No connect

Table 28. Serial ATA Connectors

1 Ground

2 TXP

3 TXN

4 Ground

5 RXN

6 RXP

7 Ground

Table 29. Processor Fan Connector

3 FAN_TACH

4 FAN_CONTROL

2.8.2.1 Chassis Fan Connectors

  • Front chassis fan
  • Rear chassis fan 1
  • Rear chassis fan 2
  • ATX fan connector (optional) The D915GAG board has two chassis fan connectors:
  • Front chassis fan
  • Rear chassis fan Table 30 lists the signal names for the chassis fan connectors. These signal names apply to all chassis fan connectors for both boards.

Table 30. Chassis Fan Connectors

1 Control

3 Tach

2.8.2.2 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.
  • Alternate power – a 1 x 4 connector. This connector provides additional power when using high wattage PCI Express x16 graphics cards. # INTEGRATOR’S NOTE When using high wattage PCI Express x16 graphics cards, use one of the following power supply configurations to avoid system instability:
  • The preferred method of power delivery is to use a power supply with a 2 x 12 main power cable. In this configuration, use two connectors to provide power to the board: ⎯ The main power connector ⎯ The ATX12V connector In this configuration, the alternate power connector is not required. The 2 x 12 main power cable can provide up to 144 W of power from the +12 V rail.
  • An alternate method of power delivery is to use a power supply has a 2 x 10 main power cable. In this configuration, use three connectors to provide power to the board: ⎯ The main power connector ⎯ The ATX12V connector ⎯ The alternate power connector

Table 31. Main Power Connector

3 Ground 15 Ground

5 Ground 17 Ground

7 Ground 19 Ground

8 PWRGD (Power Good) 20 No connect

Note: When using a 2 x 10 power supply cable, this pin will be unconnected.

Table 32. ATX12V Power Connector

1 Ground 2 Ground

Table 33. Alternate Power Connector

2.8.2.3 Add-in Card Connectors

  • PCI Express x16: one connector supporting simultaneous transfer speeds up to 8 GBytes/sec.
  • PCI Express x1: the D915GAV board has two PCI Express x1 connectors; the D915GAG board has one PCI Express x1 connector. The x1 interfaces support simultaneous transfer speeds up to 500 MBytes/sec.
  • PCI Conventional (rev 2.2 compliant) bus: the D915GAV board has four PCI Conventional bus add-in card connectors; the D915GAG board has two PCI Conventional 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 Desktop 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. NOTE The PCI Express x16 connector is configured to support only a PCI Express x1 link when the Intel GMA900 graphics controller is enabled.

2.8.2.4 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 34. Auxiliary Front Panel Power/Sleep LED Connector

1 HDR_BLNK_GRN Out Front panel green LED

2 Not connected

3 HDR_BLNK_YEL Out Front panel yellow LED

2.8.2.5 Front Panel Connector

the front panel connector. Figure 21 is a connection diagram for the front panel connector. Table 35. Front Panel Connector

1 HD_PWR Out Hard disk LED pull-up

2 HDR_BLNK_

3 HAD# Out Hard disk active LED 4 HDR_BLNK_

5 Ground Ground 6 FPBUT_IN In Power switch

7 FP_RESET# In Reset switch 8 Ground Ground

Figure 21. Connection Diagram for Front Panel Connector

2.8.2.5.1 Hard Drive Activity LED Connector [Yellow]

  • A Serial ATA hard drive connected to an onboard Serial ATA connector
  • An IDE hard drive connected to an onboard IDE connector

2.8.2.5.2 Reset Switch Connector [Purple]

switch that is normally open. When the switch is closed, the board resets and runs the POST.

2.8.2.5.3 Power/Sleep LED Connector [Green]

states for a one-color LED. Table 37 shows the possible states for a two-color LED. Table 36. States for a One-Color Power LED Table 37. States for a Two-Color Power LED product- or customer-specific.

2.8.2.5.4 Power Switch Connector [Red]

seconds must pass before the power supply will recognize another on/off signal.

2.8.2.6 Front Panel USB Connectors

Figure 22 is a connection diagram for the front panel USB connectors.

  • 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 high- speed USB devices. OM15963 Key (no pin) No Connect10 Power (+5 V DC) Ground Ground Power (+5 V DC) One USB Port One USB Port

Figure 22. Connection Diagram for Front Panel USB Connectors

2.8.2.7 Front Panel IEEE 1394a Connectors (Optional)

Figure 23 is a connection diagram for the optional IEEE 1394a connectors. Figure 23. Connection Diagram for IEEE 1394a Connectors

  • The IEEE 1394a connectors are colored blue.
  • The +12 V DC power on the IEEE 1394a connectors is fused.
  • Each IEEE 1394a connector provides one IEEE 1394a port.

2.9 Jumper Block

from the computer before changing a jumper setting. Otherwise, the board could be damaged. mode. Table 38 describes the jumper settings for the three modes: normal, configure, and recovery. processor version and the microcode version in the BIOS and reports if the two match. Figure 24. Location of the Jumper Block Table 38. BIOS Setup Configuration Jumper Settings maintenance menu is displayed. recovery diskette is required.

2.10 Mechanical Considerations

2.10.1 D915GAV Board Form Factor

of the I/O connectors and mounting holes are in compliance with the ATX specification. Figure 25. D915GAV Board Dimensions

2.10.2 D915GAG Board Form Factor

The D915GAG board is designed to fit into either a microATX or an ATX-form-factor chassis. Figure 26. D915GAG Board Dimensions

2.10.3 I/O Shield

The back panel I/O shield for the boards must meet specific dimension and material requirements. Systems based on these boards need the back panel I/O shield to pass certification testing. Figure 27 shows the I/O shield. Dimensions are given in inches to a tolerance of ±0.02 inches. shields relative to chassis requirements are described in the ATX specification. ATX chassis specification 2.03 is available from Intel.

162.3 REF

1.55 REF

Figure 27. I/O Shield Dimensions

2.11 Electrical Considerations

2.11.1 DC Loading

the board’s power delivery subsystems to the processor, memory, and USB ports. usage model and not necessarily tied to a particular processor speed. Table 39. DC Loading Characteristics

2.11.2 Add-in Board Considerations

  • A fully loaded D915GAV board (all six expansion slots and the PCI Express x16 slot filled) must not exceed 14 A.
  • A fully loaded D915GAG board (all three expansion slots and the PCI Express x16 slot filled) must not exceed 8 A.

2.11.3 Fan Connector Current Capability

component damage that will halt fan operation. Table 40 lists the current capability of the fan connectors. Table 40. Fan Connector Current Capability

2.11.4 Power Supply Considerations

required depends on the wake devices supported and manufacturing options. supply for use with the board. Additional power required will depend on configurations chosen by the integrator. 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)

2.12 Thermal Considerations

Figure 28) to maintain required airflow across the processor voltage regulator area. Figure 28. Processor Heatsink for Omni-directional Airflow presented in this document will result in a system with adequate thermal performance. Ensure that the ambient temperature does not exceed the board’s maximum operating temperature. specifications in Section 2.14.

Table 41. Thermal Considerations for Components

2.13 Reliability

repair rates and spare parts requirements. D915GAG boards is 102,038 hours.

2.14 Environmental

Table 42 lists the environmental specifications for the board. Table 42. Environmental Specifications

2.15 Regulatory Compliance

electromagnetic compatibility (EMC) regulations.

2.15.1 Safety Regulations

when correctly installed in a compatible host system. Table 43. Safety Regulations

2.15.2 EMC Regulations

when correctly installed in a compatible host system. Table 44. EMC Regulations Characteristics of Information Technology Equipment.

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

2.15.2.1 FCC Compliance Statement (USA)

Product Type: D915GAV Desktop Board and D915GAG 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.

2.15.2.2 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.

2.15.3 European Union Declaration of Conformity Statement

We, Intel Corporation, declare under our sole responsibility that the product: Intel Desktop Boards D915GAV and D915GAG are 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. 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.

2.15.4 Product Ecology Statements

The following information is provided to address worldwide product ecology concerns and regulations.

2.15.4.1 Disposal Considerations

This product contains the following materials that may be regulated upon disposal: lead solder on the printed wiring board assembly.

2.15.4.2 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.

2.15.5 Product Certification Markings (Board Level)

Table 45 lists the board’s product certification markings. Table 45. Product Certification Markings UL file number for Intel Desktop Boards: E210882 (component side). (89/336/EEC) and Low Voltage directive (73/23/EEC) (component side). The CE mark should also be on the shipping container. also be on the shipping container.

What This Chapter Contains

3.1 Introduction

The boards use an Intel/AMI BIOS that is stored in the Firmware Hub (FWH) and can be updated using a disk-based program. The FWH contains the BIOS Setup program, POST, the PCI auto- configuration utility, and Plug and Play support. The BIOS displays a message during POST identifying the type of BIOS and a revision code. The initial production BIOSs are identified as EV91510A.86A. When the BIOS Setup configuration jumper is set to configure mode and the computer is powered- up, 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 2.9 on page 77 shows how to put the Desktop Board in configure mode.

Intel Desktop Board D915GAV/D915GAG Technical Product Specification Table 46 lists the BIOS Setup program menu features. Table 46. BIOS Setup Program Menu Bar

features

Table 47 lists the function keys available for menu screens. Table 47. BIOS Setup Program Function Keys

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. considered to be available for use by the add-in card.

3.3.2 PCI IDE Support

to PIO Mode 3 or 4, depending on the capability of the drive. You can override the auto- configuration options by specifying manual configuration in the BIOS Setup program. To use ATA-66/100 features the following items are required:

  • An ATA-66/100 peripheral device
  • An ATA-66/100 compatible cable
  • ATA-66/100 operating system device drivers 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. By default, Legacy USB support is set to Enabled. 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.

Intel Desktop Board D915GAV/D915GAG 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. (Keyboards and mice are not recognized during this period if Legacy USB support was set to Disabled in the BIOS Setup program.) 6. After the operating system loads the USB drivers, all legacy and non-legacy USB devices are recognized by the operating system, and Legacy USB support from the BIOS is no longer used. To install an operating system that supports USB, verify that Legacy USB support in the BIOS Setup program is set to Enabled and follow the operating system’s installation instructions.

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 an LS-120 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 1.4, page 19

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. For information about Refer to The Intel World Wide Web site Section 1.4, page 19

3.7 Boot Options

the hard drive second, and the ATAPI CD-ROM third. The fourth device is disabled.

3.7.1 CD-ROM Boot

in the CD-ROM drive, the system will attempt to boot from the next defined drive.

3.7.2 Network Boot

or a network add-in card with a remote boot ROM installed.

3.7.3 Booting Without Attached Devices

  • Video adapter
  • Keyboard
  • Mouse

3.7.4 Changing the Default Boot Device During POST

Submenu). Table 48 lists the boot device menu options. Table 48. Boot Device Menu Options

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

3.8 Fast Booting Systems with Intel® Rapid BIOS Boot

These factors affect system boot speed:

  • Selecting and configuring peripherals properly
  • Using an optimized BIOS, such as the Intel® Rapid BIOS

3.8.1 Peripheral Selection and Configuration

The following techniques help improve system boot speed:

  • 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.

3.8.2 Intel Rapid BIOS Boot

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.
  • Enable Intel Rapid BIOS Boot. This feature bypasses memory count and the search for a diskette drive. 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).

3.9 BIOS Security Features

  • 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 49 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 49. Supervisor and User Password Functions Note: If no password is set, any us er can change all Setup options.

Intel Desktop Board D915GAV/D915GAG Technical Product Specification

4 Error Messages and Beep Codes

4.1 BIOS Error Messages

Table 50 lists the error messages and provides a brief description of each. Table 50. BIOS Error Messages mode during the memory test. Could not read sector from corresponding drive. sure device is selected correctly. A: Drive Error No response from diskette drive. CMOS Battery Low The battery may be losing power. Replace the battery soon. CMOS Display Type Wrong The display type is di fferent than what has been stored in CMOS. Check Setup to make sure type is correct. been corrupted. Run Setup to reset values. have either been corrupted or the battery has failed. 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.

Table 50. BIOS Error Messages (continued) Update OK! NVRAM was invalid and has been updated. Updated Failed NVRAM was invalid but was unable to be updated. KB/Interface Error Keyboard interface test failed. removed then memory may be bad. added there may be a problem with the system. added or removed then memory may be bad. No Boot Device Available System did not find a device to boot. should be powered down and the jumper removed. <CTRL_N> Pressed CMOS is ignored and NVRAM is cleared. User must enter Setup.

4.2 Port 80h POST Codes

useful for determining the point where an error occurred. card can decode the port and display the contents on a medium such as a seven-segment display. The POST card must be installed in PCI bus connector 1. are repeated in the tables because that code applies to more than one operation. Table 51. Uncompressed INIT Code Checkpoints 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. D5 Init code to be copied to segment 0 and control to be transferred to segment 0. point D7 for giving control to main BIOS. D7 Find Main BIOS module in ROM image. D8 Uncompress the main BIOS module. Table 52. Boot Block Recovery Code Checkpoints interrupt vector tables, initialize system timer, initialize DMA controller and interrupt controller. E8 Initialize extra (Intel Recovery) Module. 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.

Table 53. Runtime Code Uncompressed in F000 Shadow RAM 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. 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. 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. 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. 3A New cursor position read and saved. To display the Hit <DEL> message.

Table 53. Runtime Code Uncompressed in F000 Shadow RAM (continued) 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. 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. 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. 4E Memory test started. (NOT SOFT RESET) About to display the first 64k memory size. 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 regist ers 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. 58 Memory size adjusted for relocation/shadow. Going to clear Hit <DEL> message. 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. 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.

84 Lock-key checking over. To check fo r 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 unc ompress 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. 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. 96 Going to do any init before C800 optional ROM control. ROM returns control and enable external cache. 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. 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. A8 Initialization before E000 ROM contro l over. E000 ROM to get control next. AA Initialization after E000 optional ROM control is ov er. 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.

B1 Going to copy any code to specific area. 00 Copying of code to specific area done. Go ing 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 54 describes the bus initialization checkpoints. Table 54. Bus Initialization Checkpoints 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. Table 55. Upper Nibble High Byte Functions 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.

Table 56. Lower Nibble High Byte Functions

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

code) information during POST.

4.5 BIOS Beep Codes

or if an external ROM module does not properly checksum to zero. codes issued, check the documentation for that external device. completes normally, the BIOS issues one short beep before passing control to the operating system. Table 57. Beep Codes

1 CPU error

3 Memory error

6 System failure

7 System failure

8 Video error