INTEL D915GLVG

® 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 April 2005 Specification. 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. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. 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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. Copyright © 2005, Intel Corporation. All rights reserved. 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. It is specifically not intended for general audiences. What This Document Contains Chapter Description 1 A description of the hardware used on the Desktop Board D915GLVG 2 A map of the resources of the Desktop Board 3 The features supported by the BIOS Setup program 4 A description of the BIOS error messages, beep codes, and POST codes Typographical Conventions 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. WARNING Warnings indicate conditions, which if not observed, can cause personal injury. iii 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. 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 lowercase 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. iv 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 ...............................................................................................14 1.2 Online Support .............................................................................................................15 1.3 Processor.....................................................................................................................15 1.4 System Memory ...........................................................................................................16 1.4.1 Memory Configurations .................................................................................18 ® 1.5 Intel 915GL Chipset ...................................................................................................22 ® 1.5.1 Intel GMA900 Graphics Controller...............................................................22 1.5.2 USB ...............................................................................................................23 1.5.3 IDE Support...................................................................................................24 1.5.4 Real-Time Clock, CMOS SRAM, and Battery................................................25 1.6 PCI Express* Connectors ............................................................................................25 1.7 I/O Controller................................................................................................................26 1.7.1 Serial Port......................................................................................................26 1.7.2 Parallel Port...................................................................................................26 1.7.3 Diskette Drive Controller................................................................................26 1.7.4 Keyboard and Mouse Interface .....................................................................26 1.8 Audio Subsystem .........................................................................................................27 1.8.1 Audio Subsystem Software ...........................................................................27 1.8.2 Audio Connectors..........................................................................................27 ® 1.8.3 Intel High Definition Audio Subsystem ........................................................28 1.9 LAN Subsystem ...........................................................................................................29 1.9.1 10/100 Mbits/sec LAN Subsystem.................................................................29 1.9.2 LAN Subsystem Software..............................................................................30 1.10 Hardware Management Subsystem.............................................................................30 1.10.1 Hardware Monitoring and Fan Control ASIC .................................................30 1.10.2 Thermal Monitoring........................................................................................31 1.10.3 Fan Monitoring...............................................................................................32 1.10.4 Chassis Intrusion and Detection....................................................................32 1.11 Power Management .....................................................................................................32 1.11.1 ACPI ..............................................................................................................32 1.11.2 Hardware Support .........................................................................................35 2 Technical Reference 2.1 Introduction ..................................................................................................................39 2.2 Memory Resources ......................................................................................................39 2.2.1 Addressable Memory.....................................................................................39 2.2.2 Memory Map..................................................................................................41 2.3 DMA Channels.............................................................................................................41 2.4 Fixed I/O Map...............................................................................................................42 2.5 PCI Configuration Space Map......................................................................................43 2.6 Interrupts......................................................................................................................44 v Intel Desktop Board D915GLVG Technical Product Specification 2.7 PCI Conventional Interrupt Routing Map .....................................................................45 2.8 Connectors...................................................................................................................46 2.8.1 Back Panel Connectors.................................................................................47 2.8.2 Component-side Connectors.........................................................................48 2.8.3 Front Panel USB Connectors ........................................................................54 2.9 Jumper Block ...............................................................................................................55 2.10 Mechanical Considerations..........................................................................................56 2.10.1 Form Factor...................................................................................................56 2.10.2 I/O Shield.......................................................................................................57 2.11 Electrical Considerations..............................................................................................58 2.11.1 DC Loading....................................................................................................58 2.11.2 Add-in Board Considerations.........................................................................58 2.11.3 Fan Connector Current Capability.................................................................59 2.11.4 Power Supply Considerations .......................................................................59 2.12 Thermal Considerations...............................................................................................60 2.13 Reliability......................................................................................................................62 2.14 Environmental ..............................................................................................................63 2.15 Regulatory Compliance................................................................................................64 2.15.1 Safety Regulations ........................................................................................64 2.15.2 EMC Regulations...........................................................................................64 2.15.3 European Union Declaration of Conformity Statement..................................65 2.15.4 Product Ecology Statements .........................................................................66 2.15.5 Product Certification Markings (Board Level) ................................................67 3 Overview of BIOS Features 3.1 Introduction ..................................................................................................................69 3.2 BIOS Flash Memory Organization ...............................................................................70 3.3 Resource Configuration ...............................................................................................70 3.3.1 PCI Autoconfiguration....................................................................................70 3.3.2 PCI IDE Support ............................................................................................70 3.4 System Management BIOS (SMBIOS) ........................................................................71 3.5 Legacy USB Support....................................................................................................71 3.6 BIOS Updates ..............................................................................................................72 3.6.1 Language Support.........................................................................................72 3.6.2 Custom Splash Screen..................................................................................72 3.7 Boot Options ................................................................................................................73 3.7.1 CD-ROM Boot ...............................................................................................73 3.7.2 Network Boot.................................................................................................73 3.7.3 Booting Without Attached Devices ................................................................73 3.7.4 Changing the Default Boot Device During POST ..........................................73 ® 3.8 Fast Booting Systems with Intel Rapid BIOS Boot.....................................................74 3.8.1 Peripheral Selection and Configuration.........................................................74 3.8.2 Intel Rapid BIOS Boot ...................................................................................74 3.9 BIOS Security Features ...............................................................................................75 vi Contents 4 Error Messages and Beep Codes 4.1 BIOS Error Messages ..................................................................................................77 4.2 Port 80h POST Codes .................................................................................................79 4.3 Bus Initialization Checkpoints ......................................................................................83 4.4 Speaker .......................................................................................................................84 4.5 BIOS Beep Codes........................................................................................................84 Figures 1. Board Components......................................................................................................12 2. Block Diagram..............................................................................................................14 3. Memory Channel and DIMM Configuration..................................................................18 4. Dual Channel (Interleaved) Mode Configuration with Two DIMMs ..............................19 5. Dual Channel (Interleaved) Mode Configuration with Three DIMMs............................19 6. Dual Channel (Interleaved) Mode Configuration with Four DIMMs..............................20 7. Single Channel (Asymmetric) Mode Configuration with One DIMM.............................21 8. Single Channel (Asymmetric) Mode Configuration with Three DIMMs ........................21 9. Front/Back Panel Audio Connector Options for High Definition Audio Subsystem......28 10. High Definition Audio Subsystem Block Diagram ........................................................28 11. LAN Connector LED Locations ....................................................................................29 12. Location of Thermal Sensors and Fan Connectors......................................................31 13. Location of the Standby Power Indicator LED .............................................................38 14. Detailed System Memory Address Map.......................................................................40 15. Back Panel Connectors................................................................................................47 16. Component-side Connectors.......................................................................................48 17. Connection Diagram for Front Panel Connector ..........................................................53 18. Connection Diagram for Front Panel USB Connectors................................................54 19. Location of the Jumper Block.......................................................................................55 20. Board Dimensions........................................................................................................56 21. I/O Shield Dimensions..................................................................................................57 22. Processor Heatsink for Omni-directional Airflow..........................................................60 23. Localized High Temperature Zones.............................................................................61 Tables 1. Feature Summary ........................................................................................................10 2. Board Components Shown in Figure 1 ........................................................................13 3. Supported System Bus Frequency and Memory Speed Combinations .......................16 4. Supported Memory Configurations ..............................................................................17 5. LAN Connector LED States .........................................................................................30 6. Effects of Pressing the Power Switch ..........................................................................33 7. Power States and Targeted System Power .................................................................34 8. Wake-up Devices and Events......................................................................................35 9. System Memory Map ...................................................................................................41 10. DMA Channels.............................................................................................................41 11. I/O Map ........................................................................................................................42 12. PCI Configuration Space Map......................................................................................43 13. Interrupts......................................................................................................................44 14. PCI Interrupt Routing Map ...........................................................................................45 vii Intel Desktop Board D915GLVG Technical Product Specification 15. Back Panel Connectors Shown in Figure 15................................................................47 16. Component-side Connectors Shown in Figure 16 .......................................................49 17. Front Panel Audio Connector.......................................................................................49 18. Chassis Intrusion Connector........................................................................................50 19. Serial ATA Connectors.................................................................................................50 20. Processor Fan Connector ............................................................................................50 21. Chassis Fan Connectors..............................................................................................50 22. Main Power Connector.................................................................................................51 23. ATX12V Power Connector ...........................................................................................51 24. Auxiliary Front Panel Power/Sleep LED Connector .....................................................52 25. Front Panel Connector.................................................................................................52 26. States for a One-Color Power LED ..............................................................................53 27. States for a Two-Color Power LED ..............................................................................53 28. BIOS Setup Configuration Jumper Settings.................................................................55 29. DC Loading Characteristics .........................................................................................58 30. Fan Connector Current Capability................................................................................59 31. Thermal Considerations for Components ....................................................................62 32. Environmental Specifications.......................................................................................63 33. Safety Regulations.......................................................................................................64 34. EMC Regulations .........................................................................................................64 35. Product Certification Markings .....................................................................................67 36. BIOS Setup Program Menu Bar...................................................................................70 37. BIOS Setup Program Function Keys............................................................................70 38. Boot Device Menu Options ..........................................................................................73 39. Supervisor and User Password Functions...................................................................75 40. BIOS Error Messages ..................................................................................................77 41. Uncompressed INIT Code Checkpoints.......................................................................79 42. Boot Block Recovery Code Checkpoints .....................................................................79 43. Runtime Code Uncompressed in F000 Shadow RAM .................................................80 44. Bus Initialization Checkpoints ......................................................................................83 45. Upper Nibble High Byte Functions...............................................................................83 46. Lower Nibble High Byte Functions...............................................................................84 47. Beep Codes .................................................................................................................84 viii 1 Product Description What This Chapter Contains 1.1 Overview ......................................................................................................................10 1.2 Online Support .............................................................................................................15 1.3 Processor.....................................................................................................................15 1.4 System Memory ...........................................................................................................16 ® 1.5 Intel 915GL Chipset ...................................................................................................22 1.6 PCI Express Connectors..............................................................................................25 1.7 I/O Controller................................................................................................................26 1.8 Audio Subsystem .........................................................................................................27 1.9 LAN Subsystem ...........................................................................................................29 1.10 Hardware Management Subsystem.............................................................................30 1.11 Power Management .....................................................................................................32 9 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 243.84 millimeters]) ® ® Processor Support for an Intel Pentium 4 processor in an LGA775 socket with an 800 or 533 MHz system bus Memory • Four DDR SDRAM Dual Inline Memory Module (DIMM) sockets • Support for DDR 400 MHz and DDR 333 MHz DIMMs • Support for up to 4 GB of system memory Chipset ® Intel 915GL Chipset, consisting of: ® • Intel 82915GL 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 • Eight USB ports Interfaces • 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 10/100 Mbits/sec LAN subsystem using the Intel 82562GZ Platform LAN Connect (PLC) device BIOS • Intel/AMI BIOS (resident in the 4 Mbit FWH) • Support for Advanced Configuration and Power Interface (ACPI), Plug and Play, and SMBIOS continued 10 Product Description Table 1. Feature Summary (continued) Expansion • Two PCI Conventional* bus connectors Capabilities • One PCI Express* x1 bus add-in card connector Instantly Available • Support for PCI Local Bus Specification Revision 2.2 PC Technology • 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 • Hardware monitoring and fan control ASIC Subsystem • 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 For information about Refer to Available configurations for the Desktop Board D915GLVG Section 1.2, page 15 11 Intel Desktop Board D915GLVG Technical Product Specification 1.1.2 Board Layout Figure 1 shows the location of the major components. ABC D E F G CC BB H I J AA K L Z M X V T Y W U S R Q P O N OM17803 Figure 1. Board Components Table 2 lists the components identified in Figure 1. 12 Product Description Table 2. Board Components Shown in Figure 1 Item/callout from Figure 1 Description A Realtek ALC860 audio codec B Front panel audio connector C PCI Conventional bus add-in card connectors D Ethernet PLC device E Rear chassis fan connector F Back panel connectors G +12V power connector (ATX12V) H LGA775 processor socket I Hardware monitoring and fan control ASIC J Processor fan connector K Intel 82915GL GMCH L DIMM Channel A sockets M DIMM Channel B sockets N I/O controller O Power connector P Diskette drive connector Q Parallel ATE IDE connector R Battery S Chassis intrusion connector T BIOS Setup configuration jumper block U 4 Mbit Firmware Hub (FWH) V Front chassis fan connector W Serial ATA connectors X Auxiliary front panel power LED connector Y Front panel connector Z Front panel USB connectors AA Intel 82801FB I/O Controller Hub (ICH6) BB Speaker CC PCI Express x1 bus add-in card connector 13 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 USB Ports PCI Express x1 Slot 1 PCI Express x1 Interface Serial Port LPC Bus Parallel Port Parallel ATA Parallel ATA I/O IDE Connector IDE Interface PS/2 Mouse Controller PS/2 Keyboard LGA775 System Bus Diskette Drive Processor Socket (800/533 MHz) Connector LPC Bus Intel 82915GL Intel 82801FB 4 Mbit Graphics and I/O Controller Hub Firmware Hub Memory Controller (ICH6) (FWH) Hub (GMCH) Intel 915GL Chipset VGA Display Interface Port Dual-Channel Memory Bus Channel A SMBus DIMMs (2) 10/100 LAN Channel B LAN PLC Connector DIMMs (2) PCI Bus Serial ATA Serial ATA IDE IDE Interface Connectors (4) PCI Slot 1 Mic In/Retasking Jack B PCI Slot 2 SMBus Line In/Retasking Jack C Audio Line Out/Retasking Jack D Codec Hardware Monitoring Retasking Jack E [Port 1] and Fan Control ASIC Retasking Jack F [Port 2] = connector or socket OM17802 Figure 2. Block Diagram 14 DMI Interconnect High Definition Audio Link LAN Connect Interface Product Description 1.2 Online Support To find information about… Visit this World Wide Web site: Intel Desktop Board D915GLVG under http://www.intel.com/design/motherbd “Desktop Board Products” or “Desktop Board Support” http://support.intel.com/support/motherboards/desktop Available configurations for the Desktop http://developer.intel.com/design/motherbd/vg/vg_available.htm Board D915GLVG Processor data sheets http://www.intel.com/design/litcentr ICH6 addressing http://developer.intel.com/products/chipsets/index.htm 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 1.3 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. For information about… Refer to: Supported processors for the D915GLVG http://www.intel.com/design/motherbd/vg/vg_documentation.htm board 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 3 on page 16 for a list of supported system bus frequency and memory speed combinations. For information about Refer to Power supply connectors Section 2.8.2.1, page 51 15 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. • Minimum total system memory: 128 MB • Non-ECC DIMMs • Serial Presence Detect • DDR 400 MHz and DDR 333 MHz SDRAM DIMMs Table 3 lists the supported system bus frequency and memory speed combinations. Table 3. Supported System Bus Frequency and Memory Speed Combinations To use this type of DIMM… The processor's system bus frequency must be… DDR 400 800 MHz DDR 333 (Note) 800 or 533 MHz Note: When using an 800 MHz system bus frequency processor, DDR 333 memory is clocked at 320 MHz. This minimizes system latencies to optimize system throughput. � NOTES 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. 16 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 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 Note: In the second column, “DS” refers to double-sided memory modules (containing two rows of SDRAM) and “SS” refers to single-sided memory modules (containing one row of SDRAM). INTEGRATOR’S NOTE # It is possible to install four 2048 MB (2 GB) modules for a total of 8 GB of system memory, however, only 4 GB of address space is available. Refer to Section 2.2.1, on page 39 for additional information on available memory. 17 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. 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 3 illustrates the memory channel and DIMM configuration. NOTE � The DIMM0 sockets of both channels are blue. The DIMM1 sockets of both channels are black. Channel A, DIMM 0 Channel A, DIMM 1 Channel B, DIMM 0 Channel B, DIMM 1 OM17804 Figure 3. Memory Channel and DIMM Configuration 18 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. In this example, the combined capacity of the two DIMMs in Channel A equal the capacity of the single DIMM in the DIMM0 (blue) socket of Channel B. 256 MB Channel A, DIMM 0 256 MB Channel A, DIMM 1 512 MB Channel B, DIMM 0 Channel B, DIMM 1 OM17122 Figure 5. Dual Channel (Interleaved) Mode Configuration with Three DIMMs 19 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 Channel A, DIMM 0 512 MB Channel A, DIMM 1 256 MB Channel B, DIMM 0 512 MB Channel B, DIMM 1 OM17124 Figure 6. Dual Channel (Interleaved) Mode Configuration with Four DIMMs 20 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. Single Channel (Asymmetric) Mode Configuration with One DIMM Figure 8 shows a single channel configuration using three DIMMs. In this example, the combined capacity of the two DIMMs in Channel A does not equal the capacity of the single DIMM in the DIMM0 (blue) socket of Channel B. 256 MB Channel A, DIMM 0 512 MB Channel A, DIMM 1 512 MB Channel B, DIMM 0 Channel B, DIMM 1 OM17126 Figure 8. Single Channel (Asymmetric) Mode Configuration with Three DIMMs 21 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. 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 915GL chipset http://developer.intel.com/ Resources used by the chipset Chapter 2 ® 1.5.1 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 • High performance 3-D setup and render engine • High quality/performance texture engine • Display ⎯ Integrated 24-bit 400 MHz RAMDAC ⎯ DDC2B compliant interface • Hardware motion compensation for software MPEG2 decode • Dynamic Video Memory Technology (DVMT) support up to 224 MB ® • Intel Zoom Utility For information about Refer to DVMT Section 1.5.1.1, page 23 Obtaining graphics software and utilities Section 1.2, page 15 22 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. 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. 1.5.1.2 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 board 1.5.2 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 15, page 47 The location of the front panel USB connectors Figure 16, page 48 23 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. 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. � NOTE 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 Figure 16, page 48 1.5.3.2 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 24 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 1.5.4 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. 1.6 PCI Express* Connectors The boards provides one PCI Express x1 connector. The x1 interface supports 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 25 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 2.88 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. 1.7.1 Serial Port The Serial port A connector is located on the back panel. The serial port supports 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 15, page 47 1.7.2 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 15, page 47 1.7.3 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 Figure 16, page 48 1.7.4 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 15, page 47 26 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. • 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. 1.8.1 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 1.2, page 15 1.8.2 Audio Connectors The boards contain audio connector on both the back panel and the component side of the board. The front panel audio connector is a 2 x 5-pin connector that provides mic in and line out signals for front panel audio connectors. For information about Refer to The location of the front panel audio connector Figure 16, page 48 The signal names of the front panel audio connector Table 17, page 49 27 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. The available configurable audio ports are shown in Figure 9. Front Panel Back Panel Audio Connectors Audio Connectors Mic In/ Line Out/ Retasking Jack E Line In/ Retasking Jack F [Port 1] Retasking Jack C [Port 2] Line Out/ Retasking Jack D Mic In/ Retasking Jack B OM16989 Figure 9. Front/Back Panel Audio Connector Options for High Definition Audio Subsystem Figure 10 is a block diagram of the High Definition audio subsystem. Mic In/Retasking Jack B 82801FB Line In/Retasking Jack C Intel I/O Controller ALC860 High Definition Line Out/Retasking Jack D Hub Audio Codec Audio Link Front Panel Mic In/Retasking Jack E [Port 1] (ICH6) Front Panel Line Out/Retasking Jack F [Port 2] OM17805 Figure 10. High Definition Audio Subsystem Block Diagram For information about Refer to The back panel audio connectors Figure 15, page 47 28 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 1.9.1 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 Intel 82562GZ Physical Layer Interface Device The Intel 82562GZ provides the following functions: • Basic 10/100 Ethernet LAN connectivity • Full device driver compatibility • Programmable transit threshold • Configuration EEPROM that contains the MAC address 1.9.1.2 RJ-45 LAN Connector with Integrated LEDs Two LEDs are built into the RJ-45 LAN connector (shown in Figure 11). Green LED Yellow LED OM15076 Figure 11. LAN Connector LED Locations 29 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. Yellow Off 10 Mbits/sec data rate is selected On 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 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 1.10.1 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 Figure 12, page 31 30 Product Description 1.10.2 Thermal Monitoring Figure 12 shows the location of the sensors and fan connectors. 3 1 A B C 4 1 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. Location of Thermal Sensors and Fan Connectors 31 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. For information about Refer to The functions of the fan connectors Section 1.11.2.2, page 36 1.10.4 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. For information about Refer to The location of the chassis intrusion connector Figure 16, page 48 The signal names of the chassis intrusion connector Table 18, page 50 1.11 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 1.11.1 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 8 on page 35) • Support for a front panel power and sleep mode switch 32 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… pressed for …the system enters this state Off Less than four seconds Power-on (ACPI G2/G5 – Soft off) (ACPI G0 – working state) On Less than four seconds Soft-off/Standby (ACPI G0 – working state) (ACPI G1 – sleeping state) On More than four seconds Fail safe power-off (ACPI G0 – working state) (ACPI G2/G5 – Soft off) Sleep Less than four seconds Wake-up (ACPI G1 – sleeping state) (ACPI G0 – working state) Sleep More than four seconds Power-off (ACPI G1 – sleeping state) (ACPI G2/G5 – Soft off) 33 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. The operating system uses information from applications and user settings to put the system as a whole into a low-power state. Table 7 lists the power states supported by the boards along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states. Table 7. Power States and Targeted System Power Processor Targeted System (Note 1) Global States Sleeping States States Device States Power G0 – working S0 – working C0 – working D0 – working state. Full power > 30 W state G1 – sleeping S1 – Processor C1 – stop D1, D2, D3 – device 5 W < power < 52.5 W state stopped grant specification specific. (Note 2) G1 – sleeping S3 – Suspend to No power D3 – no power Power < 5 W state RAM. Context except for wake-up saved to RAM. logic. (Note 2) G1 – sleeping S4 – Suspend to No power D3 – no power Power < 5 W state disk. Context except for wake-up saved to disk. logic. (Note 2) G2/S5 S5 – Soft off. No power D3 – no power Power < 5 W Context not saved. except for wake-up Cold boot is logic. required. G3 – No power to the No power D3 – no power for No power to the system. mechanical off system. wake-up logic, Service can be except when performed safely. AC power is provided by battery disconnected or external source. from the computer. Notes: 1. Total system power is dependent on the system configuration, including add-in boards and peripherals powered by the system chassis’ power supply. 2. Dependent on the standby power consumption of wake-up devices used in the system. 34 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) LAN S1, S3, S4, S5 Modem (back panel Serial Port A) S1, S3 (Note) PME# signal S1, S3, S4, S5 Power switch S1, S3, S4, S5 PS/2 devices S1, S3 RTC alarm S1, S3, S4, S5 USB S1, S3 WAKE# signal S1, S3, S4, S5 Note: For LAN and PME# signal, S5 is disabled by default in the BIOS Setup program. Setting this option to Power On will enable a wake-up event from LAN in the S5 state. NOTE � The use of these wake-up events from an ACPI state requires an operating system that provides full ACPI support. In addition, software, drivers, and peripherals must fully support ACPI wake events. 1.11.2 Hardware Support CAUTION Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities and Instantly Available PC technology features are used. Failure to do so can damage the power supply. The total amount of standby current required depends on the wake devices supported and manufacturing options. The boards provide several power management hardware features, including: • 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). 35 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. 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 Figure 16, page 48 The signal names of the main power connector Table 22, page 51 1.11.2.2 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 and sensors for thermal monitoring Figure 12, page 31 The signal names of the processor fan connector Table 20, page 50 The signal names of the chassis fan connectors Table 21, page 50 1.11.2.3 LAN Wake Capabilities CAUTION 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 36 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. 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 8 on page 35 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. 1.11.2.5 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 1.11.2.6 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. 1.11.2.7 Wake from PS/2 Devices PS/2 device activity wakes the computer from an ACPI S1 or S3 state. 1.11.2.8 PME# Signal Wake-up Support When the PME# signal on the PCI Conventional bus is asserted, the computer wakes from an ACPI S1, S3, S4, or S5 state (with Wake on PME enabled in BIOS). 1.11.2.9 WAKE# Signal Wake-up Support When the WAKE# signal on the PCI Express bus is asserted, the computer wakes from an ACPI S1, S3, S4, or S5 state. 37 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. Failure to do so could damage the board and any attached devices. CR3J1 OM17807 Figure 13. Location of the Standby Power Indicator LED 38 2 Technical Reference What This Chapter Contains 2.1 Introduction ..................................................................................................................39 2.2 Memory Resources ......................................................................................................39 2.3 DMA Channels.............................................................................................................41 2.4 Fixed I/O Map...............................................................................................................42 2.5 PCI Configuration Space Map......................................................................................43 2.6 Interrupts......................................................................................................................44 2.7 PCI Conventional Interrupt Routing Map .....................................................................45 2.8 Connectors...................................................................................................................46 2.9 Jumper Block ...............................................................................................................55 2.10 Mechanical Considerations..........................................................................................56 2.11 Electrical Considerations..............................................................................................58 2.12 Thermal Considerations...............................................................................................60 2.13 Reliability......................................................................................................................62 2.14 Environmental ..............................................................................................................63 2.15 Regulatory Compliance................................................................................................64 2.1 Introduction Sections 2.2 - 2.6 contain several standalone tables. Table 9 describes the system memory map, Table 10 lists the DMA channels, Table 11 shows the I/O map, Table 12 defines the PCI Conventional bus configuration space map, and Table 13 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) 39 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. 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. 4 GB Top of System Address Space FLASH APIC ~20 MB Reserved PCI Memory Range - contains PCI, chipsets, 1 MB Direct Media Interface 0FFFFFH Upper BIOS (DMI), and ICH ranges area (64 KB) (approximately 750 MB) 0F0000H 960 KB 0EFFFFH Lower BIOS Top of usable area DRAM (memory (64 KB; visible to the 16 KB x 4) 0E0000H operating 896 KB 0DFFFFH system) Add-in Card BIOS and Buffer area (128 KB; 16 KB x 8) 0C0000H DRAM 768 KB 0BFFFFH Range Standard PCI/ ISA Video Memory (SMM 1 MB Memory) 640 KB 128 KB 0A0000H DOS 640 KB 09FFFFH Compatibility DOS area Memory (640 KB) 00000H 0 MB 0 KB OM17140 Figure 14. Detailed System Memory Address Map 40 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. 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 memory manager software) 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 10. DMA Channels DMA Channel Number Data Width System Resource 0 8 or 16 bits Open 1 8 or 16 bits Parallel port 2 8 or 16 bits Diskette drive 3 8 or 16 bits Parallel port (for ECP or EPP) 4 8 or 16 bits DMA controller 5 16 bits Open 6 16 bits Open 7 16 bits Open 41 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 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 8 bytes Primary Parallel ATA IDE channel command block (Note 1) 0228 - 022F 8 bytes LPT3 (Note 1) 0278 - 027F 8 bytes LPT2 (Note 1) 02E8 - 02EF 8 bytes COM4 (Note 1) 02F8 - 02FF 8 bytes COM2 0374 - 0377 4 bytes Secondary Parallel ATA IDE channel control block 0377, bits 6:0 7 bits Secondary IDE channel status port 0378 - 037F 8 bytes LPT1 03E8 - 03EF 8 bytes COM3 03F0 - 03F5 6 bytes Diskette channel 03F4 – 03F7 1 byte Primary Parallel ATA IDE channel control block 03F8 - 03FF 8 bytes COM1 04D0 - 04D1 2 bytes Edge/level triggered PIC LPTn + 400 8 bytes ECP port, LPTn base address + 400h (Note 2) 0CF8 - 0CFB 4 bytes PCI Conventional bus configuration address register (Note 3) 0CF9 1 byte Reset control register 0CFC - 0CFF 4 bytes PCI Conventional bus configuration data register FFA0 - FFA7 8 bytes Primary Parallel ATA IDE bus master registers FFA8 - FFAF 8 bytes Secondary Parallel ATA IDE bus master registers Notes: 1. Default, but can be changed to another address range 2. Dword access only 3. Byte access only � NOTE Some additional I/O addresses are not available due to ICH6 address aliasing. The ICH6 data sheet provides more information on address aliasing. For information about Refer to Obtaining the ICH6 data sheet Section 1.2, page 15 42 Technical Reference 2.5 PCI Configuration Space Map Table 12. PCI Configuration Space Map Bus Device Function Number (hex) Number (hex) Number (hex) Description 00 00 00 Memory controller of Intel 82915GL component 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) 00 1C 01 PCI Express port 2 00 1C 02 PCI Express port 3 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) 00 00 PCI Conventional bus connector 1 (Note) 01 00 PCI Conventional bus connector 2 (Note) 08 00 Intel 82562GZ 10/100 Mbits/sec LAN PLC Note: Bus number is dynamic and can change based on add-in cards used. 43 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. Interrupts IRQ System Resource NMI I/O channel check 0 Reserved, interval timer 1 Reserved, keyboard buffer full 2 Reserved, cascade interrupt from slave PIC (Note 1) 3 COM2 (Note 1) 4 COM1 5 LPT2 (Plug and Play option)/User available 6 Diskette drive (Note 1) 7 LPT1 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) (Note 2) 16 User available (through PIRQA) (Note 2) 17 User available (through PIRQB) (Note 2) 18 User available (through PIRQC) (Note 2) 19 User available (through PIRQD) (Note 2) 20 User available (through PIRQE) (Note 2) 21 User available (through PIRQF) (Note 2) 22 User available (through PIRQG) (Note 2) 23 User available (through PIRQH) Notes: 1. Default, but can be changed to another IRQ. 2. Available in APIC mode only. 44 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. 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 14 shows an example of how the PIRQ signals are routed. For example, using Table 14 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 14. PCI Interrupt Routing Map ICH6 PIRQ Signal Name PCI Interrupt Source PIRQA PIRQB PIRQC PIRQD PIRQE PIRQF PIRQG PIRQH ICH6 LAN INTA PCI bus connector 1 INTD INTA INTB INTC PCI bus connector 2 INTC INTB INTA INTD NOTE � In PIC mode, the ICH6 can connect each PIRQ line internally to one of the IRQ signals (3, 4, 5, 6, 7, 9, 10, 11, 12, 14, and 15). Typically, a device that does not share a PIRQ line will have a unique interrupt. However, in certain interrupt-constrained situations, it is possible for two or more of the PIRQ lines to be connected to the same IRQ signal. Refer to Table 13 for the allocation of PIRQ lines to IRQ signals in APIC mode. PCI interrupt assignments to the USB ports, Serial ATA ports, and PCI Express ports are dynamic. 45 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. 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 47) • Component-side I/O connectors (see page 48) 46 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 J F D E G H I K OM17808 Figure 15. Back Panel Connectors Table 15. Back Panel Connectors Shown in Figure 15 Item/callout from Figure 15 Description 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 USB ports (two) J LAN K USB ports (two) NOTE � The back panel audio line out connector is designed to power headphones or amplified speakers only. Poor audio quality occurs if passive (non-amplified) speakers are connected to this output. 47 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 C D E 12 910 4 3 13 1 T 1 2 11 10 1 9 11 3 2 1 1 4 F 1 2 1 S 10 1 R 24 2 23 1 2 34 40 2 Q 1 33 39 1 P N L J I H G O M K OM17809 Figure 16. Component-side Connectors 48 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 A Front panel audio connector B PCI Conventional bus add-in card connector 2 C PCI Conventional bus add-in card connector 1 D Rear chassis fan connector E +12V power connector (ATX12V) F Processor fan connector G Power connector H Diskette drive connector I Parallel ATA IDE connector J Chassis intrusion connector K Front chassis fan connector L Serial ATA connector 1 M Serial ATA connector 3 N Serial ATA connector 2 O Serial ATA connector 0 P Auxiliary front panel power LED connector Q Front panel connector R Front panel USB connector S Front panel USB connector T PCI Express x1 bus add-in card connector Table 17. Front Panel Audio Connector Pin Signal Name Pin Signal Name 1 Port E [Port 1] Left Channel 2 Ground 3 Port E [Port 1] Right Channel 4 Presence# (dongle present) 5 Port F [Port 2] Right Channel 6 Port E [Port 1] Sense return (jack detection) 7 Port E [Port 1] and Port F [Port 2] 8 Key Sense send (jack detection) 9 Port F [Port 2] Left Channel 10 Port F [Port 2] Sense return (jack detection) INTEGRATOR’S NOTE # The front panel audio connector is colored yellow. 49 Intel Desktop Board D915GLVG Technical Product Specification Table 18. Chassis Intrusion Connector 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. Chassis Fan Connectors Pin Signal Name 1 Control 2 +12 V 3 Tach 50 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. • 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. Table 22. Main Power Connector Pin Signal Name Pin Signal Name 1 +3.3 V 13 +3.3 V 2 +3.3 V 14 -12 V 3 Ground 15 Ground 4 +5 V 16 PS-ON# (power supply remote on/off) 5 Ground 17 Ground 6 +5 V 18 Ground 7 Ground 19 Ground 8 PWRGD (Power Good) 20 No connect 9 +5 V (Standby) 21 +5 V 10 +12 V 22 +5 V (Note) (Note) 11 +12 V 23 +5 V (Note) (Note) 12 2 x 12 connector detect 24 Ground Note: When using a 2 x 10 power supply cable, this pin will be unconnected. Table 23. ATX12V Power Connector Pin Signal Name Pin Signal Name 1 Ground 2 Ground 3 +12 V 4 +12 V 51 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). PCI Conventional bus add-in cards with SMBus support can access sensor data and other information residing on the 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. 2.8.2.3 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 24. Auxiliary Front Panel Power/Sleep LED Connector Pin Signal Name In/Out Description 1 HDR_BLNK_GRN Out Front panel green LED 2 Not connected 3 HDR_BLNK_YEL Out Front panel yellow LED 2.8.2.4 Front Panel Connector This section describes the functions of the front panel connector. Table 25 lists the signal names of the front panel connector. Figure 17 is a connection diagram for the front panel connector. Table 25. Front Panel Connector Pin Signal In/Out Description Pin Signal In/Out Description Hard Drive Activity LED Power LED [Yellow] [Green] 1 HD_PWR Out Hard disk LED pull-up 2 HDR_BLNK_ Out Front panel green (750 Ω) to +5 V GRN LED 3 HAD# Out Hard disk active LED 4 HDR_BLNK_ Out Front panel yellow YEL LED Reset Switch On/Off Switch [Purple] [Red] 5 Ground Ground 6 FPBUT_IN In Power switch 7 FP_RESET# In Reset switch 8 Ground Ground Power Not Connected 9 +5 V Power 10 N/C Not connected 52 Technical Reference N/C 9 +5 V DC 8 7 Power Reset Switch Switch 6 5 4 3 Dual-colored Single-colored − Power LED Power LED Hard Drive Activity LED + − 2 1 + − + 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. Proper LED function requires one of the following: • A Serial ATA hard drive connected to an onboard Serial ATA connector • An IDE hard drive connected to an onboard IDE connector 2.8.2.4.2 Reset Switch Connector [Purple] Pins 5 and 7 [Purple] can be connected to a momentary single pole, single throw (SPST) type switch that is normally open. When the switch is closed, the board resets and runs the POST. 2.8.2.4.3 Power/Sleep LED Connector [Green] Pins 2 and 4 [Green] can be connected to a one- or two-color LED. Table 26 shows the possible states for a one-color LED. Table 27 shows the possible states for a two-color LED. Table 26. States for a One-Color Power LED LED State Description Off Power off/sleeping Steady Green Running Table 27. States for a Two-Color Power LED LED State Description Off Power off Steady Green Running Steady Yellow Sleeping 53 Green Red Yellow Purple 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.) At least two seconds must pass before the power supply will recognize another on/off signal. 2.8.3 Front Panel USB Connectors Figure 18 is a connection diagram for the front panel USB connectors. INTEGRATOR’S NOTES # • 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. Power Power 1 2 (+5 V DC) (+5 V DC) D− 3 4 D− One One USB USB Port Port 5 6 D+ D+ 7 8 Ground Ground 10 Key (no pin) No Connect OM15963 Figure 18. Connection Diagram for Front Panel USB Connectors 54 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. When the jumper is set to configure mode and the computer is powered-up, the BIOS compares the processor version and the microcode version in the BIOS and reports if the two match. 1 3 J8J4 OM17810 Figure 19. Location of the Jumper Block Table 28. BIOS Setup Configuration Jumper Settings Function/Mode Jumper Setting Configuration The BIOS uses current configuration information and Normal 1-2 1 3 passwords for booting. After the POST runs, Setup runs automatically. The Configure 2-3 13 maintenance menu is displayed. The BIOS attempts to recover the BIOS configuration. A Recovery None 13 recovery diskette is required. 55 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 [45.72] 6.500 [165.10] 6.100 [154.94] 5.200 [132.08] 0.00 2.850 [72.39] 3.100 [78.74] 6.450 [163.83] 3.150 6.200 2.600 0.00 [80.01] [157.48] [66.04] OM17811 Figure 20. Board Dimensions 56 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. 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 ± 0.12 [0.063 ± 0.005] 20. ± 0.254 TYP [0.787 ± 0.10] 159.2 ± 0.12 1.55 REF [0.061] [6.268 ± 0.005] 22.45 [0.884] 8x R 0.5 MIN 7.012 [0.276] Ø 1.00 [0.039] A A 0.00 [0.00] 11.81 11.811 [0.465] [0.465] 14.4 [0.567] 12.00 [0.472] Pictorial View OM17812 Figure 21. I/O Shield Dimensions 57 0.00 [0.00] 9.44 [0.372] 21.13 [0.832] 27.876 [1.097] 57.206 [2.252] 102.84 [4.049] 120.81 [4.756] 142.12 [5.595] 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. Maximum values assume a load placed on the board that is similar to a heavy gaming environment with a 500 mA current draw per USB port. These calculations are not based on specific processor values or memory configurations but are based on the minimum and maximum current draw possible from the board’s power delivery subsystems to the processor, memory, and USB ports. Use the datasheets for add-in cards, such as PCI, to determine the overall system power requirements. The selection of a power supply at the system level is dependent on the system’s usage model and not necessarily tied to a particular processor speed. Table 29. DC Loading Characteristics DC Current at: Mode DC Power +3.3 V +5 V +12 V -12 V +5 VSB Minimum loading 200.00 W 3.30 A 10.00 A 900 A 0.03 A 0.80 A Maximum loading 300.00 W 6.00 A 14.00 A 16.00 A 0.10 A 1.40 A 2.11.2 Add-in Board 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. 58 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. Fan Connector Current Capability Fan Connector Maximum Available Current Processor fan 1000 mA Front chassis fan 600 mA Rear chassis fan 600 mA 2.11.4 Power Supply Considerations CAUTION The +5 V standby line for the power supply must be capable of providing adequate +5 V standby current. Failure to do so can damage the power supply. The total amount of standby current required depends on the wake devices supported and manufacturing options. System integrators should refer to the power usage values listed in Table 29 when selecting a power supply for use with the board. Additional power required will depend on configurations chosen by the integrator. The power supply must comply with the following recommendations found in the indicated 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) 59 Intel Desktop Board D915GLVG Technical Product Specification 2.12 Thermal Considerations CAUTION o A chassis with a maximum internal ambient temperature of 38 C 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. Processor Heatsink for Omni-directional Airflow CAUTION Failure to ensure appropriate airflow may result in reduced performance of both the processor and/or voltage regulator or, in some instances, damage to the board. For a list of chassis that have been tested with Intel desktop boards please refer to the following website: http://developer.intel.com/design/motherbd/cooling.htm 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. CAUTION Ensure that the ambient temperature does not exceed the board’s maximum operating temperature. Failure to do so could cause components to exceed their maximum case temperature and malfunction. For information about the maximum operating temperature, see the environmental specifications in Section 2.14. 60 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 o (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. A B C D OM17813 Item Description A Processor voltage regulator area B Processor C Intel 82915GL GMCH D Intel 82801FB ICH6 Figure 23. Localized High Temperature Zones 61 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. Thermal Considerations for Components Component Maximum Case Temperature Intel Pentium 4 processor For processor case temperature, see processor datasheets and processor specification updates o Intel 82915GL GMCH 99 C (under bias) o Intel 82801FB ICH6 110 C (under bias) For information about Refer to Intel Pentium 4 processor datasheets and specification updates Section 1.2, page 15 2.13 Reliability The Mean Time Between Failures (MTBF) prediction is calculated using component and subassembly random failure rates. 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. 62 Technical Reference 2.14 Environmental Table 32 lists the environmental specifications for the board. Table 32. Environmental Specifications Parameter Specification Temperature Non-Operating -40 °C to +70 °C Operating 0 °C to +55 °C Shock Unpackaged 50 g trapezoidal waveform Velocity change of 170 inches/second Packaged Half sine 2 millisecond Product Weight (pounds) Free Fall (inches) Velocity Change (inches/sec) <20 36 167 21-40 30 152 41-80 24 136 81-100 18 118 Vibration Unpackaged 5 Hz to 20 Hz: 0.01 g² Hz sloping up to 0.02 g² Hz 20 Hz to 500 Hz: 0.02 g² Hz (flat) Packaged 5 Hz to 40 Hz: 0.015 g² Hz (flat) 40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz 63 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. Safety Regulations Regulation Title UL 60950-1:2003/ Information Technology Equipment - Safety - Part 1: General Requirements (USA and Canada) CSA C22.2 No. 60950-1-03 EN 60950-1:2002 Information Technology Equipment - Safety - Part 1: General Requirements (European Union) IEC 60950-1:2001, First Edition Information Technology Equipment - Safety - Part 1: General Requirements (International) 2.15.2 EMC Regulations Table 34 lists the EMC regulations the Desktop Board D915GLVG complies with when correctly installed in a compatible host system. Table 34. EMC Regulations Regulation Title FCC (Class B) Title 47 of the Code of Federal Regulations, Parts 2 and 15, Subpart B, Radio Frequency Devices. (USA) ICES-003 (Class B) Interference-Causing Equipment Standard, Digital Apparatus. (Canada) EN55022: 1998 (Class B) Limits and methods of measurement of Radio Interference Characteristics of Information Technology Equipment. (European Union) EN55024: 1998 Information Technology Equipment – Immunity Characteristics Limits and methods of measurement. (European Union) AS/NZS CISPR 22 (Class B) Australian Communications Authority, Standard for Electromagnetic Compatibility. (Australia and New Zealand) rd CISPR 22, 3 Edition (Class B) Limits and methods of measurement of Radio Disturbance Characteristics of Information Technology Equipment. (International) CISPR 24: 1997 Information Technology Equipment – Immunity Characteristics – Limits and Methods of Measurements. (International) VCCI (Class B) Voluntary Control for Interference by Information Technology Equipment (Japan) 64 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. 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. Tested to comply with FCC standards for home or office use. 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 Board D915GLVG is 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. 65 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. 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. 66 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. Declares compliance to European Union (EU) EMC directive (89/336/EEC) and Low Voltage directive (73/23/EEC) (component side). The CE mark should also be on the shipping container. Australian Communications Authority (ACA) C-Tick mark. Includes adjacent Intel supplier code number, N-232. The C-tick mark should also be on the shipping container. Printed wiring board manufacturer’s recognition mark: consists of a V-0 or 94V-0 unique UL recognized manufacturer’s logo, along with a flammability rating (solder side). 67 Intel Desktop Board D915GLVG Technical Product Specification 68 3 Overview of BIOS Features What This Chapter Contains 3.1 Introduction ..................................................................................................................69 3.2 BIOS Flash Memory Organization ...............................................................................70 3.3 Resource Configuration ...............................................................................................70 3.4 System Management BIOS (SMBIOS) ........................................................................71 3.5 Legacy USB Support....................................................................................................71 3.6 BIOS Updates ..............................................................................................................72 3.7 Boot Options ................................................................................................................73 ® 3.8 Fast Booting Systems with Intel Rapid BIOS Boot.....................................................74 3.9 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. The BIOS displays a message during POST identifying the type of BIOS and a revision code. The initial production BIOSs are identified as VG91510A.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 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 55 shows how to put the Desktop Board in configure mode. 69 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 processor advanced passwords power options discards displays and memory features and security management changes to processor configuration available features features and Setup information through the power supply program chipset controls options Table 37 lists the function keys available for menu screens. Table 37. BIOS Setup Program Function Keys BIOS Setup Program Function Key Description <←> or <→> Selects a different menu screen (Moves the cursor left or right) <↑> or <↓> Selects an item (Moves the cursor up or down) Selects a field (Not implemented) Executes command or selects the submenu Load the default configuration values for the current menu Save the current values and exits the BIOS Setup program Exits the menu 3.2 BIOS Flash Memory Organization The Firmware Hub (FWH) includes a 4 Mbit (512 KB) symmetrical flash memory device. 3.3 Resource Configuration 3.3.1 PCI Autoconfiguration The BIOS can automatically configure PCI devices. PCI devices may be onboard or add-in cards. Autoconfiguration lets a user insert or remove PCI cards without having to configure the system. When a user turns on the system after adding a PCI card, the BIOS automatically configures interrupts, the I/O space, and other system resources. Any interrupts set to Available in Setup are considered to be available for use by the add-in card. 3.3.2 PCI IDE Support If you select Auto in the BIOS Setup program, the BIOS automatically sets up the PCI IDE connector with independent I/O channel support. The IDE interface supports hard drives up to ATA-66/100 and recognizes any ATAPI compliant devices, including CD-ROM drives, tape drives, and Ultra DMA drives. The BIOS determines the capabilities of each drive and configures them to optimize capacity and performance. To take advantage of the high capacities typically available today, hard drives are automatically configured for Logical Block Addressing (LBA) and 70 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: • 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. 71 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. 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 1.2, page 15 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 1.2, page 15 72 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. Under the Boot menu in the BIOS Setup program, ATAPI CD-ROM is listed as a boot device. Boot devices are defined in priority order. Accordingly, if there is not a bootable CD in the CD-ROM drive, the system will attempt to boot from the next defined drive. 3.7.2 Network Boot The network can be selected as a boot device. This selection allows booting from the onboard LAN or a network add-in card with a remote boot ROM installed. Pressing the key during POST automatically forces booting from the LAN. To use this key during POST, the User Access Level in the BIOS Setup program's Security menu must be set to Full. 3.7.3 Booting Without Attached Devices For use in embedded applications, the BIOS has been designed so that after passing the POST, the operating system loader is invoked even if the following devices are not present: • Video adapter • Keyboard • Mouse 3.7.4 Changing the Default Boot Device During POST Pressing the key during POST causes a boot device menu to be displayed. This menu displays the list of available boot devices (as set in the BIOS setup program’s Boot Device Priority Submenu). Table 38 lists the boot device menu options. Table 38. Boot Device Menu Options Boot Device Menu Function Keys Description <↑> or <↓> Selects a default boot device Exits the menu, saves changes, and boots from the selected device Exits the menu without saving changes 73 Intel Desktop Board D915GLVG 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). 74 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. • 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 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 39 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 39. Supervisor and User Password Functions Supervisor Password to Password Password Set Mode User Mode Setup Options Enter Setup During Boot Neither Can change all Can change all None None None (Note) (Note) options options Supervisor Can change all Can change a Supervisor Password Supervisor None only options limited number of options User only N/A Can change all Enter Password User User options Clear User Password Supervisor Can change all Can change a Supervisor Password Supervisor or Supervisor or and user set options limited number Enter Password user user of options Note: If no password is set, any user can change all Setup options. 75 Intel Desktop Board D915GLVG Technical Product Specification 76 4 Error Messages and Beep Codes What This Chapter Contains 4.1 BIOS Error Messages ..................................................................................................77 4.2 Port 80h POST Codes .................................................................................................79 4.3 Bus Initialization Checkpoints ......................................................................................83 4.4 Speaker .......................................................................................................................84 4.5 BIOS Beep Codes........................................................................................................84 4.1 BIOS Error Messages Table 40 lists the error messages and provides a brief description of each. Table 40. BIOS Error Messages Error Message Explanation GA20 Error An error occurred with Gate A20 when switching to protected mode during the memory test. Pri Master HDD Error Could not read sector from corresponding drive. Pri Slave HDD Error Pri Master Drive - ATAPI Incompatible Corresponding drive in not an ATAPI device. Run Setup to make Pri Slave Drive - ATAPI Incompatible sure device is selected correctly. A: Drive Error No response from diskette drive. Cache Memory Bad An error occurred when testing L2 cache. Cache memory may be bad. CMOS Battery Low The battery may be losing power. Replace the battery soon. CMOS Display Type Wrong The display type is different than what has been stored in CMOS. Check Setup to make sure type is correct. CMOS Checksum Bad The CMOS checksum is incorrect. CMOS memory may have been corrupted. Run Setup to reset values. CMOS Settings Wrong CMOS values are not the same as the last boot. These values have either been corrupted or the battery has failed. CMOS Date/Time Not Set The time and/or date values stored in CMOS are invalid. Run 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. Checking NVRAM..... NVRAM is being checked to see if it is valid. continued 77 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. If no memory was removed then memory may be bad. Memory Size Increased Memory size has increased since the last boot. If no memory was added there may be a problem with the system. Memory Size Changed Memory size has changed since the last boot. If no memory was added or removed then memory may be bad. No Boot Device Available System did not find a device to boot. Off Board Parity Error A parity error occurred on an off-board card. This error is followed by an address. On Board Parity Error A parity error occurred in onboard memory. This error is followed by an address. Parity Error A parity error occurred in onboard memory at an unknown address. NVRAM/CMOS/PASSWORD cleared by NVRAM, CMOS, and passwords have been cleared. The system Jumper should be powered down and the jumper removed. Pressed CMOS is ignored and NVRAM is cleared. User must enter Setup. 78 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. NOTE � The POST card must be installed in PCI bus connector 1. The tables below offer descriptions of the POST codes generated by the BIOS. Table 41 defines the uncompressed INIT code checkpoints, Table 42 describes the boot block recovery code checkpoints, and Table 43 lists the runtime code uncompressed in F000 shadow RAM. Some codes are repeated in the tables because that code applies to more than one operation. Table 41. Uncompressed INIT Code Checkpoints Code Description of POST Operation D0 NMI is Disabled. Onboard KBC, RTC enabled (if present). Init code Checksum verification starting. 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. D4 Verify base memory. D5 Init code to be copied to segment 0 and control to be transferred to segment 0. D6 Control is in segment 0. To check recovery mode and verify main BIOS checksum. If either it is recovery mode or main BIOS checksum is bad, go to check point E0 for recovery else go to check point D7 for giving control to main BIOS. D7 Find Main BIOS module in ROM image. D8 Uncompress the main BIOS module. D9 Copy main BIOS image to F000 shadow RAM and give control to main BIOS in F000 shadow RAM. Table 42. Boot Block Recovery Code Checkpoints Code Description of POST Operation E0 Onboard Floppy Controller (if any) is initialized. Compressed recovery code is uncompressed in 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. E8 Initialize extra (Intel Recovery) Module. E9 Initialize floppy drive. 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. EF Booting from floppy and ATAPI device failed. Give two beeps. Retry the booting procedure again (go to check point E9). 79 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. 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 , key during power-on. 12 To init CMOS if "Init CMOS in every boot" is set or key is pressed. Going to disable DMA and Interrupt controllers. 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. 23 To read 8042 input port and disable Megakey GreenPC feature. Make BIOS code segment writeable. 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. 2A Different buses init (system, static, output devices) to start if present. (See Section 4.3 for details of different buses.) 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. 38 Different buses init (input, IPL, general devices) to start if present. (See Section 4.3 for details of different buses.) 39 Display different buses initialization error messages. (See Section 4.3 for details of different buses.) 3A New cursor position read and saved. To display the Hit message. continued 80 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. About to go for writing patterns to test memory. 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. 49 Amount of memory below 1M found and verified. Going to find out amount of memory above 1M memory. 4B Amount of memory above 1M found and verified. Check for soft reset and going to clear 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. 4D Memory above 1M cleared. (SOFT RESET) Going to save the memory size. (Go to check point # 52h). 4E Memory test started. (NOT SOFT RESET) About to display the first 64k memory size. 4F Memory size display started. This will be updated during memory test. Going for sequential and random memory test. 50 Memory testing/initialization below 1M complete. Going to adjust displayed memory size for relocation/shadow. 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 registers 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. 57 A20 address line, parity/NMI disable successful. Going to adjust memory size depending on relocation/shadow. 58 Memory size adjusted for relocation/shadow. Going to clear Hit message. 59 Hit message cleared. message displayed. About to start DMA and interrupt controller test. 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. 80 Keyboard test started. Clearing output buffer, checking for stuck key, to issue keyboard reset command. 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. continued 81 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. 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. 8B First screen message displayed. message displayed. PS/2 Mouse check and 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. 95 Init of different buses optional ROMs from C800 to start. (See Section 4.3 for details of different buses.) 96 Going to do any init before C800 optional ROM control. 97 Any init before C800 optional ROM control is over. Optional ROM check and control will be done next. 98 Optional ROM control is done. About to give control to do any required processing after optional ROM returns control and enable external cache. 99 Any initialization required after optional ROM test over. Going to setup timer data area and printer base address. 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. 9E Initialization after Coprocessor test is complete. Going to check extended keyboard, keyboard ID and num-lock. 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. A7 NMI and parity enabled. Going to do any initialization required before giving control to optional ROM at E000. A8 Initialization before E000 ROM control over. E000 ROM to get control next. A9 Returned from E000 ROM control. Going to do any initialization required after E000 optional ROM control. AA Initialization after E000 optional ROM control is over. 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. continued 82 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. Table 44 describes the bus initialization checkpoints. Table 44. Bus Initialization Checkpoints Checkpoint Description 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. While control is inside the different bus routines, additional checkpoints are output to port 80h as WORD to identify the routines under execution. In these WORD checkpoints, the low byte of the checkpoint is the system BIOS checkpoint from which the control is passed to the different bus routines. The high byte of the checkpoint is the indication of which routine is being executed in the different buses. Table 45 describes the upper nibble of the high byte and indicates the function that is being executed. Table 45. Upper Nibble High Byte Functions Value Description 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. 83 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. The speaker provides audible error code (beep code) information during POST. For information about Refer to The location of the onboard speaker Figure 1, on page 12 4.5 BIOS Beep Codes Whenever a recoverable error occurs during POST, the BIOS displays an error message describing the problem (see Table 47). The BIOS also issues a beep code (one long tone followed by two short tones) during POST if the video configuration fails (a faulty video card or no card installed) or if an external ROM module does not properly checksum to zero. An external ROM module (for example, a video BIOS) can also issue audible errors, usually consisting of one long tone followed by a series of short tones. For more information on the beep codes issued, check the documentation for that external device. There are several POST routines that issue a POST terminal error and shut down the system if they fail. Before shutting down the system, the terminal-error handler issues a beep code signifying the test point error, writes the error to I/O port 80h, attempts to initialize the video and writes the error in the upper left corner of the screen (using both monochrome and color adapters). If POST completes normally, the BIOS issues one short beep before passing control to the operating system. Table 47. Beep Codes Beep Description 1 CPU error 3 Memory error 6 System failure 7 System failure 8 Video error 84