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Intel D915GLVG Specification

Intel D915GLVG Specification

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Intel
D915GLVG
Technical Product Specification
®
The Intel
Desktop Board D915GLVG 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 D915GLVG Specification Update.
®
Desktop Board
April 2005
Order Number: D18285-001US

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Summary of Contents for Intel D915GLVG

  • Page 1 Order Number: D18285-001US ® The Intel Desktop Board D915GLVG 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 D915GLVG Specification Update.

  • Page 2: Revision History

    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.

  • Page 3: Intended Audience

    The TPS is intended to provide detailed, technical information about the Desktop Board D915GLVG and its components to the vendors, system integrators, and other engineers and technicians who need this level of information. It is specifically not intended for general audiences.
  • Page 4 Intel Desktop Board D915GLVG Technical Product Specification 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 board, and X is the instance of the particular part at that general location.

  • Page 5: Table Of Contents

    Board Layout ....................12 1.1.3 Block Diagram ....................14 Online Support ......................15 Processor ........................15 System Memory ......................16 1.4.1 Memory Configurations ................. 18 ® Intel 915GL Chipset ....................22 ® 1.5.1 Intel GMA900 Graphics Controller............... 22 1.5.2 USB ....................... 23 1.5.3 IDE Support ....................
  • Page 6 Intel Desktop Board D915GLVG Technical Product Specification PCI Conventional Interrupt Routing Map ..............45 Connectors........................46 2.8.1 Back Panel Connectors ................. 47 2.8.2 Component-side Connectors................. 48 2.8.3 Front Panel USB Connectors ................ 54 Jumper Block ....................... 55 2.10 Mechanical Considerations ..................56 2.10.1...
  • Page 7 Contents 4 Error Messages and Beep Codes BIOS Error Messages ....................77 Port 80h POST Codes ....................79 Bus Initialization Checkpoints ..................83 Speaker ........................84 BIOS Beep Codes......................84 Figures Board Components ...................... 12 Block Diagram......................14 Memory Channel and DIMM Configuration ..............18 Dual Channel (Interleaved) Mode Configuration with Two DIMMs ......
  • Page 8 Intel Desktop Board D915GLVG Technical Product Specification Back Panel Connectors Shown in Figure 15..............47 Component-side Connectors Shown in Figure 16 ............49 Front Panel Audio Connector..................49 Chassis Intrusion Connector ..................50 Serial ATA Connectors....................50 Processor Fan Connector .................... 50 Chassis Fan Connectors....................
  • Page 9 What This Chapter Contains Overview ........................10 Online Support ......................15 Processor ........................15 System Memory ......................16 ® Intel 915GL Chipset ....................22 PCI Express Connectors....................25 I/O Controller........................ 26 Audio Subsystem ......................27 LAN Subsystem ......................29 1.10 Hardware Management Subsystem................30...

  • Page 10: Overview

    LAN Support 10/100 Mbits/sec LAN subsystem using the Intel 82562GZ Platform LAN Connect (PLC) device • Intel/AMI BIOS (resident in the 4 Mbit FWH) BIOS • Support for Advanced Configuration and Power Interface (ACPI), Plug and Play, and SMBIOS continued...

  • Page 11: Product Description

    • Thermal sense to detect out of range thermal values • Three fan connectors • Three fan sense inputs used to monitor fan activity • Fan speed control For information about Refer to Available configurations for the Desktop Board D915GLVG Section 1.2, page 15...

  • Page 12: Board Layout

    Intel Desktop Board D915GLVG Technical Product Specification 1.1.2 Board Layout Figure 1 shows the location of the major components. OM17803 Figure 1. Board Components Table 2 lists the components identified in Figure 1.

  • Page 13: Board Components Shown In Figure 1

    BIOS Setup configuration jumper block 4 Mbit Firmware Hub (FWH) Front chassis fan connector Serial ATA connectors Auxiliary front panel power LED connector Front panel connector Front panel USB connectors Intel 82801FB I/O Controller Hub (ICH6) Speaker PCI Express x1 bus add-in card connector...

  • Page 14: Block Diagram

    Intel Desktop Board D915GLVG Technical Product Specification 1.1.3 Block Diagram Figure 2 is a block diagram of the major functional areas of the boards. Back Panel/ Front Panel USB Ports PCI Express x1 Slot 1 PCI Express x1 Interface Serial Port...

  • Page 15: Online Support

    1.3 Processor The board is designed to support Intel Pentium 4 processors in an LGA775 processor socket with an 800 or 533 MHz system bus. See the Intel web site listed below for the most up-to-date list of supported processors.

  • Page 16: System Memory

    Intel Desktop Board D915GLVG Technical Product Specification 1.4 System Memory The boards have four DIMM sockets and support the following memory features: • 2.5 V (only) DDR SDRAM DIMMs with gold-plated contacts • Unbuffered, single-sided or double-sided DIMMs with the following restriction: Double-sided DIMMS with x16 organization are not supported.

  • Page 17: Supported Memory Configurations

    Product Description Table 4 lists the supported DIMM configurations. Table 4. Supported Memory Configurations DIMM SDRAM SDRAM Organization Number of SDRAM Capacity Configuration Density Front-side/Back-side Devices 128 MB 256 Mbit 16 M x 16/empty 256 MB 256 Mbit 32 M x 8/empty 256 MB 512 Mbit 32 M x 16/empty...

  • Page 18: Memory Configurations

    Intel Desktop Board D915GLVG Technical Product Specification 1.4.1 Memory Configurations The Intel 82915GL GMCH supports two types of memory organization: • Dual channel (Interleaved) mode. This mode offers the highest throughput for real world applications. Dual channel mode is enabled when the installed memory capacities of both DIMM channels are equal.

  • Page 19: Dual Channel (Interleaved) Mode Configuration With Two Dimms

    Product Description 1.4.1.1 Dual Channel (Interleaved) Mode Configurations Figure 4 shows a dual channel configuration using two DIMMs. In this example, the DIMM0 (blue) sockets of both channels are populated with identical DIMMs. Channel A, DIMM 0 1 GB Channel A, DIMM 1 1 GB Channel B, DIMM 0 Channel B, DIMM 1...

  • Page 20: Dual Channel (Interleaved) Mode Configuration With Four Dimms

    Intel Desktop Board D915GLVG Technical Product Specification Figure 6 shows a dual channel configuration using four DIMMs. In this example, the combined capacity of the two DIMMs in Channel A equal the combined capacity of the two DIMMs in Channel B. Also, the DIMMs are matched between DIMM0 and DIMM1 of both channels.

  • Page 21: Single Channel (Asymmetric) Mode Configuration With One Dimm

    Product Description 1.4.1.2 Single Channel (Asymmetric) Mode Configurations NOTE Dual channel (Interleaved) mode configurations provide the highest memory throughput. Figure 7 shows a single channel configuration using one DIMM. In this example, only the DIMM0 (blue) socket of Channel A is populated. Channel B is not populated. Channel A, DIMM 0 256 MB Channel A, DIMM 1...

  • Page 22: Intel ® 915Gl Chipset

    1.5 Intel ® 915GL Chipset The Intel 915GL chipset consists of the following devices: • Intel 82915GL 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.

  • Page 23: Usb

    NOTE The use of DVMT requires operating system driver support. 1.5.1.2 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 D915GLVG http://www.intel.com/design/motherbd/vg/vg_documentation.htm...

  • Page 24: Ide Support

    Intel Desktop Board D915GLVG Technical Product Specification 1.5.3 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 1.5.3.1 Parallel ATE IDE Interface The ICH6’s Parallel ATA IDE controller has one bus-mastering Parallel ATA IDE interface.

  • Page 25: Real-Time Clock, Cmos Sram, And Battery

    Product Description 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.

  • Page 26: I/O Controller

    Intel Desktop Board D915GLVG Technical Product Specification 1.7 I/O Controller The I/O controller provides the following features: • One serial port • One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port (EPP) support • Serial IRQ interface compatible with serialized IRQ support for PCI Conventional bus systems •...

  • Page 27: Audio Subsystem

    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.

  • Page 28: Intel ® High Definition Audio Subsystem

    Intel Desktop Board D915GLVG Technical Product Specification 1.8.3 Intel ® High Definition Audio Subsystem The Intel High Definition Audio subsystem includes the following: • 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.

  • Page 29: Lan Subsystem

    PCI Conventional bus power management ⎯ Supports ACPI technology ⎯ Supports LAN wake capabilities 1.9.1 10/100 Mbits/sec LAN Subsystem The 10/100 Mbits/sec LAN subsystem includes the ICH6, the Intel 82562GZ PLC, and an RJ-45 LAN connector with integrated status LEDs. ® 1.9.1.1...

  • Page 30: Lan Subsystem Software

    Yellow 10 Mbits/sec data rate is selected 100 Mbits/sec data rate is selected 1.9.2 LAN Subsystem Software LAN software and drivers are available from Intel’s World Wide Web site. For information about Refer to Obtaining LAN software and drivers Section 1.2, page 15 1.10 Hardware Management Subsystem...

  • Page 31: Thermal Monitoring

    Product Description 1.10.2 Thermal Monitoring Figure 12 shows the location of the sensors and fan connectors. OM17806 Item Description Remote ambient temperature sensor Thermal diode, located on processor die Ambient temperature sensor, internal to hardware monitoring and fan control ASIC Processor fan Rear chassis fan Front chassis fan...

  • Page 32: Fan Monitoring

    Intel Desktop Board D915GLVG Technical Product Specification 1.10.3 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.

  • Page 33: Effects Of Pressing The Power Switch

    Product Description Table 6 lists the system states based on how long the power switch is pressed, depending on how ACPI is configured with an ACPI-aware operating system. Table 6. Effects of Pressing the Power Switch …and the power switch is If the system is in this state…...

  • Page 34: Power States And Targeted System Power

    Intel Desktop Board D915GLVG Technical Product Specification 1.11.1.1 System States and Power States Under ACPI, the operating system directs all system and device power state transitions. The operating system puts devices in and out of low-power states based on user preferences and knowledge of how devices are being used by applications.

  • Page 35: Hardware Support

    Product Description 1.11.1.2 Wake-up Devices and Events Table 8 lists the devices or specific events that can wake the computer from specific states. Table 8. Wake-up Devices and Events These devices/events can wake up the computer… …from this state (Note) S1, S3, S4, S5 Modem (back panel Serial Port A) S1, S3...

  • Page 36: Power Connector

    Intel Desktop Board D915GLVG Technical Product Specification NOTE The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an operating system that provides full ACPI support. 1.11.2.1 Power Connector ATX12V-compliant power supplies can turn off the system power through system control. When an ACPI-enabled system receives the correct command, the power supply removes all non-standby voltages.
  • Page 37 Product Description • The PCI Conventional bus PME# signal for PCI 2.2 compliant LAN designs • The onboard LAN subsystem 1.11.2.4 Instantly Available PC Technology CAUTION For Instantly Available PC technology, the +5 V standby line for the power supply must be capable of providing adequate +5 V standby current.

  • Page 38: Location Of The Standby Power Indicator Led

    Intel Desktop Board D915GLVG Technical Product Specification 1.11.2.10 +5 V Standby Power Indicator LED The +5 V standby power indicator LED shows that power is still present even when the computer appears to be off. Figure 13 shows the location of the standby power indicator LED.

  • Page 39: Technical Reference

    2 Technical Reference What This Chapter Contains Introduction ........................39 Memory Resources ...................... 39 DMA Channels ......................41 Fixed I/O Map....................... 42 PCI Configuration Space Map..................43 Interrupts ........................44 PCI Conventional Interrupt Routing Map ..............45 Connectors........................46 Jumper Block ....................... 55 2.10 Mechanical Considerations ..................

  • Page 40: Detailed System Memory Address Map

    Intel Desktop Board D915GLVG Technical Product Specification • 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.

  • Page 41: Memory Map

    Technical Reference 2.2.2 Memory Map Table 9 lists the system memory map. Table 9. System Memory Map Address Range (decimal) Address Range (hex) Size Description 1024 K - 4194304 K 100000 - FFFFFFFF 4095 MB Extended memory 960 K - 1024 K F0000 - FFFFF 64 KB Runtime BIOS...

  • Page 42: Fixed I/O Map

    Address (hex) Size Description 0000 - 00FF 256 bytes Used by the Desktop Board D915GLVG. Refer to the ICH6 data sheet for dynamic addressing information. 0170 - 0177 8 bytes Secondary Parallel ATA IDE channel command block 01F0 - 01F7...

  • Page 43: Pci Configuration Space Map

    Device Function Number (hex) Number (hex) Number (hex) Description Memory controller of Intel 82915GL component Integrated graphics controller Integrated graphics controller Intel High Definition Audio Controller PCI Express port 1 (PCI Express x1 bus connector) PCI Express port 2 PCI Express port 3...

  • Page 44: Interrupts

    Intel Desktop Board D915GLVG Technical Product Specification 2.6 Interrupts The interrupts can be routed through either the Programmable Interrupt Controller (PIC) or the Advanced Programmable Interrupt Controller (APIC) portion of the ICH6 component. The PIC is supported in Windows 98 SE and Windows ME and uses the first 16 interrupts. The APIC is supported in Windows 2000 and Windows XP and supports a total of 24 interrupts.

  • Page 45: Pci Conventional Interrupt Routing Map

    Technical Reference 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.

  • Page 46: Connectors

    Intel Desktop Board D915GLVG Technical Product Specification 2.8 Connectors CAUTION Only the following connectors have overcurrent protection: back panel USB, front panel USB, and PS/2. The other internal connectors are not overcurrent protected and should connect only to devices inside the computer’s chassis, such as fans and internal peripherals. Do not use these connectors to power devices external to the computer’s chassis.

  • Page 47: Back Panel Connectors

    Technical Reference 2.8.1 Back Panel Connectors Figure 15 shows the location of the back panel connectors. The back panel connectors are color-coded. The figure legend (Table 15) lists the colors used (when applicable). OM17808 Figure 15. Back Panel Connectors Table 15. Back Panel Connectors Shown in Figure 15 Item/callout from Figure 15...

  • Page 48: Component-Side Connectors

    Intel Desktop Board D915GLVG Technical Product Specification 2.8.2 Component-side Connectors Figure 16 shows the locations of the component-side connectors. OM17809 Figure 16. Component-side Connectors...

  • Page 49: Component-Side Connectors Shown In Figure 16

    Technical Reference Table 16 lists the component-side connectors identified in Figure 16. Table 16. Component-side Connectors Shown in Figure 16 Item/callout from Figure 16 Description Front panel audio connector PCI Conventional bus add-in card connector 2 PCI Conventional bus add-in card connector 1 Rear chassis fan connector +12V power connector (ATX12V) Processor fan connector...

  • Page 50: Chassis Intrusion Connector

    Intel Desktop Board D915GLVG Technical Product Specification Table 18. Chassis Intrusion Connector Signal Name Intruder Ground Table 19. Serial ATA Connectors Signal Name Ground Ground Ground Table 20. Processor Fan Connector Signal Name Ground +12 V FAN_TACH FAN_CONTROL Table 21.

  • Page 51: Main Power Connector

    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.

  • Page 52: Auxiliary Front Panel Power/Sleep Led Connector

    Intel Desktop Board D915GLVG Technical Product Specification 2.8.2.2 Add-in Card Connectors The board has the following add-in card connectors: • One PCI Express x1 bus add-in card connector. The x1 interface supports simultaneous transfer speeds up to 500 MBytes/sec. •...

  • Page 53: Connection Diagram For Front Panel Connector

    Technical Reference +5 V DC Power Reset Switch Switch − Dual-colored Single-colored Hard Drive Power LED Power LED − Activity LED − OM17000 Figure 17. Connection Diagram for Front Panel Connector 2.8.2.4.1 Hard Drive Activity LED Connector [Yellow] Pins 1 and 3 [Yellow] can be connected to an LED to provide a visual indicator that data is being read from or written to a hard drive.

  • Page 54: Front Panel Usb Connectors

    Intel Desktop Board D915GLVG Technical Product Specification NOTE The colors listed in Table 26 and Table 27 are suggested colors only. Actual LED colors are product- or customer-specific. 2.8.2.4.4 Power Switch Connector [Red] Pins 6 and 8 [Red] can be connected to a front panel momentary-contact power switch. The switch must pull the SW_ON# pin to ground for at least 50 ms to signal the power supply to switch on or off.

  • Page 55: Jumper Block

    Technical Reference 2.9 Jumper Block CAUTION Do not move the jumper with the power on. Always turn off the power and unplug the power cord from the computer before changing a jumper setting. Otherwise, the board could be damaged. Figure 19 shows the location of the jumper block. The jumper block determines the BIOS Setup program’s mode.

  • Page 56: Mechanical Considerations

    Intel Desktop Board D915GLVG Technical Product Specification 2.10 Mechanical Considerations 2.10.1 Form Factor The board is designed to fit into either a microATX or an ATX-form-factor chassis. Figure 20 illustrates the mechanical form factor of the board. Dimensions are given in inches [millimeters].

  • Page 57: I/O Shield

    ATX specification. NOTE The I/O shield drawing in this document is for reference only. An I/O shield compliant with the ATX chassis specification 2.03 is available from Intel. 162.3 REF [6.390] 1.6 ±...

  • Page 58: Electrical Considerations

    The boards are designed to provide 2 A (average) of +5 V current for each add-in board. The total +5 V current draw for both boards is as follows: a fully loaded D915GLVG board (all three expansion slots filled) must not exceed 6 A.

  • Page 59: Fan Connector Current Capability

    Technical Reference 2.11.3 Fan Connector Current Capability CAUTION The processor fan must be connected to the processor fan connector, not to a chassis fan connector. Connecting the processor fan to a chassis fan connector may result in onboard component damage that will halt fan operation. Table 30 lists the current capability of the fan connectors.

  • Page 60: Thermal Considerations

    All responsibility for determining the adequacy of any thermal or system design remains solely with the reader. Intel makes no warranties or representations that merely following the instructions presented in this document will result in a system with adequate thermal performance.

  • Page 61: Localized High Temperature Zones

    (item A in Figure 23) can reach a temperature of up to 85 C in an open chassis. Figure 23 shows the locations of the localized high temperature zones. OM17813 Item Description Processor voltage regulator area Processor Intel 82915GL GMCH Intel 82801FB ICH6 Figure 23. Localized High Temperature Zones...

  • Page 62: Reliability

    The calculation is based on the Bellcore Reliability Prediction Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF prediction is used to estimate repair rates and spare parts requirements. The MTBF data is calculated from predicted data at 55 ºC. The MTBF for the D915GLVG board is 125,355 hours.

  • Page 63: Environmental

    Technical Reference 2.14 Environmental Table 32 lists the environmental specifications for the board. Table 32. Environmental Specifications Parameter Specification Temperature -40 °C to +70 °C Non-Operating 0 °C to +55 °C Operating Shock Unpackaged 50 g trapezoidal waveform Velocity change of 170 inches/second Packaged Half sine 2 millisecond Product Weight (pounds)

  • Page 64: Regulatory Compliance

    This section describes the Desktop Boards’ compliance with U.S. and international safety and electromagnetic compatibility (EMC) regulations. 2.15.1 Safety Regulations Table 33 lists the safety regulations the Desktop Board D915GLVG complies with when correctly installed in a compatible host system. Table 33.

  • Page 65: European Union Declaration Of Conformity Statement

    • Consult the dealer or an experienced radio/TV technician for help. Any changes or modifications to the equipment not expressly approved by Intel Corporation could void the user’s authority to operate the equipment. Tested to comply with FCC standards for home or office use.

  • Page 66: Product Ecology Statements

    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/...

  • Page 67: Product Certification Markings (Board Level)

    Product Certification Markings Description Marking UL joint US/Canada Recognized Component mark. Includes adjacent UL file number for Intel Desktop Boards: E210882 (component side). FCC Declaration of Conformity logo mark for Class B equipment; includes Intel name and D915GLVG model designation (component side).
  • Page 68 Intel Desktop Board D915GLVG Technical Product Specification...

  • Page 69: Overview Of Bios Features

    BIOS Security Features ....................75 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.

  • Page 70: Bios Flash Memory Organization

    Intel Desktop Board D915GLVG Technical Product Specification Table 36 lists the BIOS Setup program menu features. Table 36. BIOS Setup Program Menu Bar Maintenance Main Advanced Security Power Boot Exit Clears Displays Configures Sets Configures Selects boot Saves or passwords and...

  • Page 71: System Management Bios (Smbios)

    Overview of BIOS Features 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: •...

  • Page 72: Bios Updates

    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: •...

  • Page 73: Boot Options

    Overview of BIOS Features 3.7 Boot Options In the BIOS Setup program, the user can choose to boot from a diskette drive, hard drives, CD-ROM, or the network. The default setting is for the diskette drive to be the first boot device, the hard drive second, and the ATAPI CD-ROM third.

  • Page 74: Fast Booting Systems With Intel ® Rapid Bios Boot

    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.

  • Page 75: Bios Security Features

    Overview of BIOS Features 3.9 BIOS Security Features The BIOS includes security features that restrict access to the BIOS Setup program and who can boot the computer. A supervisor password and a user password can be set for the BIOS Setup program and for booting the computer, with the following restrictions: •...
  • Page 76 Intel Desktop Board D915GLVG Technical Product Specification...

  • Page 77: Error Messages And Beep Codes

    4 Error Messages and Beep Codes What This Chapter Contains BIOS Error Messages ....................77 Port 80h POST Codes ....................79 Bus Initialization Checkpoints ..................83 Speaker ........................84 BIOS Beep Codes......................84 4.1 BIOS Error Messages Table 40 lists the error messages and provides a brief description of each. Table 40.
  • Page 78 Intel Desktop Board D915GLVG Technical Product Specification Table 40. BIOS Error Messages (continued) Error Message Explanation Update OK! NVRAM was invalid and has been updated. Updated Failed NVRAM was invalid but was unable to be updated. Keyboard Error Error in the keyboard connection. Make sure keyboard is connected properly.

  • Page 79: Port 80H Post Codes

    F000:0000 in Shadow RAM and give control to recovery code in F000 Shadow RAM. Initialize interrupt vector tables, initialize system timer, initialize DMA controller and interrupt controller. Initialize extra (Intel Recovery) Module. Initialize floppy drive. Try to boot from floppy. If reading of boot sector is successful, give control to boot sector code.

  • Page 80: Runtime Code Uncompressed In F000 Shadow Ram

    Intel Desktop Board D915GLVG Technical Product Specification Table 43. Runtime Code Uncompressed in F000 Shadow RAM Code Description of POST Operation NMI is Disabled. To check soft reset/power-on. BIOS stack set. Going to disable cache if any. POST code to be uncompressed.
  • Page 81 Error Messages and Beep Codes Table 43. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation To prepare the descriptor tables. To enter in virtual mode for memory test. To enable interrupts for diagnostics mode. To initialize data to check memory wrap around at 0:0. Data initialized.
  • Page 82 Intel Desktop Board D915GLVG Technical Product Specification Table 43. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation Lock-key checking over. To check for memory size mismatch with CMOS. Memory size check done. To display soft error and check for password or bypass setup.

  • Page 83: Bus Initialization Checkpoints

    Error Messages and Beep Codes Table 43. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation Uncompress SMBIOS module and init SMBIOS code and form the runtime SMBIOS image in shadow. Going to copy any code to specific area. Copying of code to specific area done.

  • Page 84: Speaker

    Intel Desktop Board D915GLVG Technical Product Specification Table 46 describes the lower nibble of the high byte and indicates the bus on which the routines are being executed. Table 46. Lower Nibble High Byte Functions Value Description Generic DIM (Device Initialization Manager)

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