Intel® Desktop Board D915GLVG Technical Product Specification April 2005 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.
Revision History Revision Revision History Date -001 First release of the Intel Desktop Board D915GLVG Technical Product Specification. April 2005 This product specification applies to only standard Intel Desktop Board D915GLVG with BIOS identifier VG91510A.86A. Changes to this specification will be published in the Intel Desktop Board D915GLVG Specification Update before being incorporated into a revision of this document. INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL® PRODUCTS.
Preface This Technical Product Specification (TPS) specifies the board layout, components, connectors, power and environmental requirements, and the BIOS for the Intel® Desktop Board D915GLVG. It describes the standard product and available manufacturing options. 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.
Intel Desktop Board D915GLVG Technical Product Specification Other Common Notation iv # 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. For example, J5J1 is a connector, located at 5J. It is the first connector in the 5J area.
Contents 1 Product Description 1.1 Overview ...................................................................................................................... 10 1.1.1 Feature Summary.......................................................................................... 10 1.1.2 Board Layout ................................................................................................. 12 1.1.3 Block Diagram ..........................................................................................
Intel Desktop Board D915GLVG Technical Product Specification 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 PCI Conventional Interrupt Routing Map ..................................................................... 45 Connectors................................................................................................................... 46 2.8.1 Back Panel Connectors ................................................................................. 47 2.8.2 Component-side Connectors...................
Contents 4 Error Messages and Beep Codes 4.1 4.2 4.3 4.4 4.5 BIOS Error Messages .................................................................................................. 77 Port 80h POST Codes ................................................................................................. 79 Bus Initialization Checkpoints ...................................................................................... 83 Speaker .............................................................................
Intel Desktop Board D915GLVG Technical Product Specification 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. viii Back Panel Connectors Shown in Figure 15................................................................ 47 Component-side Connectors Shown in Figure 16 ....................................................... 49 Front Panel Audio Connector........................................................................
1 Product Description What This Chapter Contains 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 Overview ...................................................................................................................... 10 Online Support ............................................................................................................. 15 Processor ..................................................................................................................... 15 System Memory ............
Intel Desktop Board D915GLVG Technical Product Specification 1.1 Overview 1.1.1 Feature Summary Table 1 summarizes the major features of the board. Table 1. Feature Summary Form Factor microATX (9.60 inches by 9.60 inches [243.84 millimeters by 243.
Product Description Table 1. Feature Summary (continued) Expansion Capabilities • Two PCI Conventional* bus connectors Instantly Available PC Technology • Support for PCI Local Bus Specification Revision 2.2 • One PCI Express* x1 bus add-in card connector • Support for PCI Express Revision 1.
Intel Desktop Board D915GLVG Technical Product Specification 1.1.2 Board Layout Figure 1 shows the location of the major components. A B CD E F G CC BB H I J K AA L Z M X Y V W T U S R Q P O N OM17803 Figure 1. Board Components Table 2 lists the components identified in Figure 1.
Product Description Table 2.
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.
Product Description 1.2 Online Support To find information about… Visit this World Wide Web site: Intel Desktop Board D915GLVG 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 D915GLVG http://developer.intel.com/design/motherbd/vg/vg_available.htm Processor data sheets http://www.intel.com/design/litcentr ICH6 addressing http://developer.intel.
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. • • • • • 4 GB maximum total system memory. Refer to Section 2.2.1 on page 39 for information on the total amount of addressable memory.
Product Description Table 4 lists the supported DIMM configurations. Table 4.
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. Technology and device width can vary from one channel to the other but the installed memory capacity for each channel must be equal.
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. 1 GB Channel A, DIMM 0 Channel A, DIMM 1 1 GB Channel B, DIMM 0 Channel B, DIMM 1 OM17123 Figure 4. Dual Channel (Interleaved) Mode Configuration with Two DIMMs Figure 5 shows a dual channel configuration using three 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. 256 MB 512 MB Channel A, DIMM 0 Channel A, DIMM 1 256 MB 512 MB Channel B, DIMM 0 Channel B, DIMM 1 OM17124 Figure 6.
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. 256 MB Channel A, DIMM 0 Channel A, DIMM 1 Channel B, DIMM 0 Channel B, DIMM 1 OM17125 Figure 7.
Intel Desktop Board D915GLVG Technical Product Specification 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.
Product Description 1.5.1.1 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.
Intel Desktop Board D915GLVG Technical Product Specification 1.5.3 IDE Support The boards provides five IDE interface connectors: • • 1.5.3.1 One parallel ATA IDE connector that supports two devices Four serial ATA IDE connectors that support one device per connector Parallel ATE IDE Interface The ICH6’s Parallel ATA IDE controller has one bus-mastering Parallel ATA IDE interface.
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. For more information, see: http://www.serialata.org/ For information about Refer to The location of the Serial ATA IDE connectors Figure 16, page 48 1.5.
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 PS/2-style mouse and keyboard interfaces Interface for one 1.44 MB or 2.
Product Description 1.8 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.
Intel Desktop Board D915GLVG Technical Product Specification Intel® High Definition Audio Subsystem 1.8.3 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. The available configurable audio ports are shown in Figure 9.
Product Description 1.9 LAN Subsystem The LAN subsystem consists of the following: • • Physical layer interface device Intel® 82562GZ PLC for 10/100 Mbits/sec Ethernet LAN connectivity. 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 82562GZ PCI Conventional bus power management ⎯ Supports ACPI technology ⎯ Supports LAN wake capabilities 1.9.
Intel Desktop Board D915GLVG Technical Product Specification Table 5 describes the LED states when the board is powered up and the 10/100 Mbits/sec LAN subsystem is operating. Table 5. LAN Connector LED States LED Color LED State Condition Green Off LAN link is not established. On LAN link is established. Blinking LAN activity is occurring. Off 10 Mbits/sec data rate is selected On 100 Mbits/sec data rate is selected Yellow 1.9.
Product Description 1.10.2 Thermal Monitoring Figure 12 shows the location of the sensors and fan connectors. 3 1 A B 4 1 C D 1 3 F E OM17806 Item Description A Remote ambient temperature sensor B Thermal diode, located on processor die C Ambient temperature sensor, internal to hardware monitoring and fan control ASIC D Processor fan E Rear chassis fan F Front chassis fan Figure 12.
Intel Desktop Board D915GLVG Technical Product Specification 1.10.3 Fan Monitoring Fan monitoring can be implemented using Intel® Desktop Utilities, LANDesk* software, or thirdparty 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 1.11.2.2, page 36 1.10.
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.
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. Devices that are not being used can be turned off.
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.
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.
Product Description • • 1.11.2.4 The PCI Conventional bus PME# signal for PCI 2.2 compliant LAN designs The onboard LAN subsystem 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. Failure to provide adequate standby current when implementing Instantly Available PC technology can damage the power supply.
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. CAUTION If AC power has been switched off and the standby power indicator is still lit, disconnect the power cord before installing or removing any devices connected to the board.
2 Technical Reference What This Chapter Contains 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 Introduction .................................................................................................................. 39 Memory Resources ...................................................................................................... 39 DMA Channels ............................................................................................................. 41 Fixed I/O 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 addin cards The amount of installed memory that can be used will vary based on add-in cards and BIOS settings. Figure 14 shows a schematic of the system memory map. All installed system memory can be used when there is no overlap of system addresses.
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 896 K - 960 K E0000 - EFFFF 64 KB Reserved 800 K - 896 K C8000 - DFFFF 96 KB Potential available high DOS memory (open to the PCI Conventional bus). Dependent on video adapter used.
Intel Desktop Board D915GLVG Technical Product Specification 2.4 Fixed I/O Map Table 11. I/O Map Address (hex) Size Description 0000 - 00FF 256 bytes 0170 - 0177 01F0 - 01F7 8 bytes 8 bytes Used by the Desktop Board D915GLVG. Refer to the ICH6 data sheet for dynamic addressing information.
Technical Reference 2.5 PCI Configuration Space Map Table 12.
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. Table 13.
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. In most cases, the small amount of latency added by interrupt sharing does not affect the operation or throughput of the devices.
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.
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). A B C D J F E G H I K OM17808 Figure 15. Back Panel Connectors Table 15.
Intel Desktop Board D915GLVG Technical Product Specification 2.8.2 Component-side Connectors Figure 16 shows the locations of the component-side connectors. A B 1 2 9 10 C D E 4 3 1 3 1 T 2 1 1 1 1 1 10 9 2 1 3 1 1 4 1 S 1 F 2 10 1 R 24 Q 2 23 40 2 2 1 34 1 33 39 1 P N O L M J I H G K OM17809 Figure 16.
Technical Reference Table 16 lists the component-side connectors identified in Figure 16. Table 16.
Intel Desktop Board D915GLVG Technical Product Specification Table 18. Pin Signal Name 1 Intruder 2 Ground Table 19. Serial ATA Connectors Pin Signal Name 1 Ground 2 TXP 3 TXN 4 Ground 5 RXN 6 RXP 7 Ground Table 20. Processor Fan Connector Pin Signal Name 1 Ground 2 +12 V 3 FAN_TACH 4 FAN_CONTROL Table 21.
Technical Reference 2.8.2.1 Power Supply Connectors The board has three 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.
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. Two PCI Conventional (rev 2.2 compliant) bus add-in card connectors. The SMBus is routed to PCI Conventional bus connector 2 only (ATX expansion slot 6).
Technical Reference N/C Single-colored Power LED + − − + 7 6 5 4 3 2 1 Purple Red 8 Yellow Dual-colored Power LED Green Power Switch +5 V DC 9 Reset Switch − + Hard Drive 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.
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. (The time requirement is due to internal debounce circuitry on the board.
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. Table 28 describes the jumper settings for the three modes: normal, configure, and recovery.
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]. The outer dimensions are 9.60 inches by 9.60 inches [243.84 millimeters by 243.84 millimeters]. Location of the I/O connectors and mounting holes are in compliance with the ATX specification. 1.800 [45.
Technical Reference 2.10.2 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 21 shows the I/O shield. Dimensions are given in inches to a tolerance of ±0.02 inches. The figure also indicates the position of each cutout. Additional design considerations for I/O shields relative to chassis requirements are described in the ATX specification.
Intel Desktop Board D915GLVG Technical Product Specification 2.11 Electrical Considerations 2.11.1 DC Loading Table 29 lists the DC loading characteristics of the boards. This data is based on a DC analysis of all active components within the board that impact its power delivery subsystems. The analysis does not include PCI add-in cards. Minimum values assume a light load placed on the board that is similar to an environment with no applications running and no USB current draw.
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. Table 30.
Intel Desktop Board D915GLVG Technical Product Specification 2.12 Thermal Considerations CAUTION A chassis with a maximum internal ambient temperature of 38 oC at the processor fan inlet is a requirement. Use a processor heatsink that provides omni-directional airflow (as shown in Figure 22) to maintain required airflow across the processor voltage regulator area. OM16996 Figure 22.
Technical Reference CAUTION Ensure that proper airflow is maintained in the processor voltage regulator circuit. Failure to do so may result in damage to the voltage regulator circuit. The processor voltage regulator area (item A in Figure 23) can reach a temperature of up to 85 oC in an open chassis. Figure 23 shows the locations of the localized high temperature zones.
Intel Desktop Board D915GLVG Technical Product Specification Table 31 provides maximum case temperatures for the components that are sensitive to thermal changes. The operating temperature, current load, or operating frequency could affect case temperatures. Maximum case temperatures are important when considering proper airflow to cool the board. Table 31.
Technical Reference 2.14 Environmental Table 32 lists the environmental specifications for the board. Table 32.
Intel Desktop Board D915GLVG Technical Product Specification 2.15 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.
Technical Reference 2.15.2.1 FCC Compliance Statement (USA) Product Type: D915GLVG 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.
Intel Desktop Board D915GLVG Technical Product Specification 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.
Technical Reference 2.15.5 Product Certification Markings (Board Level) Table 35 lists the board’s product certification markings. Table 35. 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). CE mark.
Intel Desktop Board D915GLVG Technical Product Specification 68
3 Overview of BIOS Features What This Chapter Contains 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 Introduction .................................................................................................................. 69 BIOS Flash Memory Organization ............................................................................... 70 Resource Configuration ............................................................................................... 70 System Management BIOS (SMBIOS) .....................
Intel Desktop Board D915GLVG Technical Product Specification Table 36 lists the BIOS Setup program menu features. Table 36.
Overview of BIOS Features to PIO Mode 3 or 4, depending on the capability of the drive. You can override the autoconfiguration 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.
Intel Desktop Board D915GLVG 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.
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. The fourth device is disabled. 3.7.1 CD-ROM Boot Booting from CD-ROM is supported in compliance to the El Torito bootable CD-ROM format specification.
Intel Desktop Board D915GLVG Technical Product Specification 3.8 Fast Booting Systems with Intel® Rapid BIOS Boot These factors affect system boot speed: • • 3.8.1 Selecting and configuring peripherals properly Using an optimized BIOS, such as the Intel® Rapid BIOS Peripheral Selection and Configuration The following techniques help improve system boot speed: • • • • 3.8.
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: • • • • • • • The supervisor password gives unrestricted access to view and change all the Setup options in the BIOS Setup program. This is the supervisor mode.
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4 Error Messages and Beep Codes What This Chapter Contains 4.1 4.2 4.3 4.4 4.5 BIOS Error Messages .................................................................................................. 77 Port 80h POST Codes ................................................................................................. 79 Bus Initialization Checkpoints ...................................................................................... 83 Speaker ............................................................
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. KB/Interface Error Keyboard interface test failed. Memory Size Decreased Memory size has decreased since the last boot.
Error Messages and Beep Codes 4.2 Port 80h POST Codes During the POST, the BIOS generates diagnostic progress codes (POST-codes) to I/O port 80h. If the POST fails, execution stops and the last POST code generated is left at port 80h. This code is useful for determining the point where an error occurred. Displaying the POST-codes requires a PCI bus add-in card, often called a POST card. The POST card can decode the port and display the contents on a medium such as a seven-segment display.
Intel Desktop Board D915GLVG Technical Product Specification Table 43. Runtime Code Uncompressed in F000 Shadow RAM Code Description of POST Operation 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.
Error Messages and Beep Codes Table 43. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation 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. 45 Data initialized. Going to check for memory wrap around at 0:0 and finding the total system memory size. 46 Memory wrap around test done. Memory size calculation over.
Intel Desktop Board D915GLVG Technical Product Specification Table 43. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation 84 Lock-key checking over. To check for 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 uncompress SETUP code and execute CMOS setup.
Error Messages and Beep Codes Table 43. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation AE Uncompress SMBIOS module and init SMBIOS code and form the runtime SMBIOS image in shadow. B1 Going to copy any code to specific area. 00 Copying of code to specific area done. Going 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.
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 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 A 47 Ω inductive speaker is mounted on the board.
