® Intel Desktop Boards D915GEV/D915GRF Technical Product Specification June 2004 Order Number: C68602-001 ® The Intel Desktop Board D915GEV/D915GRF 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 D915GEV/D915GRF Specification Update. Revision History Revision Revision History Date ® -001 First Release of the Intel Desktop Board D915GEV/D915GRF Technical June 2004 Product Specification. ® This product specification applies to only standard Intel Desktop Boards D915GEV and D915GRF with BIOS identifier EV91510A.86A. Changes to this specification will be published in the Intel Desktop Board D915GEV/D915GRF Specification Update before being incorporated into a revision of this document. ® INFORMATION IN THIS DOCUMENT IS PROVIDED IN CONNECTION WITH INTEL PRODUCTS. NO LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, TO ANY INTELLECTUAL PROPERTY RIGHTS IS GRANTED BY THIS DOCUMENT. EXCEPT AS PROVIDED IN INTEL’S TERMS AND CONDITIONS OF SALE FOR SUCH PRODUCTS, INTEL ASSUMES NO LIABILITY WHATSOEVER, AND INTEL DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY, RELATING TO SALE AND/OR USE OF INTEL PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. INTEL PRODUCTS ARE NOT INTENDED FOR USE IN MEDICAL, LIFE SAVING, OR LIFE SUSTAINING APPLICATIONS. Intel Corporation may have patents or pending patent applications, trademarks, copyrights, or other intellectual property rights that relate to the presented subject matter. The furnishing of documents and other materials and information does not provide any license, express or implied, by estoppel or otherwise, to any such patents, trademarks, copyrights, or other intellectual property rights. Intel may make changes to specifications and product descriptions at any time, without notice. Designers must not rely on the absence or characteristics of any features or instructions marked “reserved” or “undefined.” Intel reserves these for future definition and shall have no responsibility whatsoever for conflicts or incompatibilities arising from future changes to them. ® Intel desktop boards may contain design defects or errors known as errata, which may cause the product to deviate from published specifications. Current characterized errata are available on request. Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order. Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be obtained from: Intel Corporation P.O. Box 5937 Denver, CO 80217-9808 or call in North America 1-800-548-4725, Europe 44-0-1793-431-155, France 44-0-1793-421-777, Germany 44-0-1793-421-333, other Countries 708-296-9333. Intel, Pentium, and Celeron are registered trademarks of Intel Corporation or its subsidiaries in the United States and other countries. * Other names and brands may be claimed as the property of others. Preface This Technical Product Specification (TPS) specifies the board layout, components, connectors, ® power and environmental requirements, and the BIOS for these Intel Desktop Boards: D915GEV and D915GRF. It describes the standard product and available manufacturing options. Intended Audience The TPS is intended to provide detailed, technical information about the Desktop Boards D915GEV and D915GRF and their components to the vendors, system integrators, and other engineers and technicians who need this level of information. It is specifically not intended for general audiences. What This Document Contains Chapter Description 1 A description of the hardware used on the Desktop Boards D915GEV and D915GRF 2 A map of the resources of the Desktop Boards 3 The features supported by the BIOS Setup program 4 A description of the BIOS error 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. iii Intel Desktop Board D915GEV/D915GRF Technical Product Specification WARNING Warnings indicate conditions, which if not observed, can cause personal injury. Other Common Notation # Used after a signal name to identify an active-low signal (such as USBP0#) (NxnX) When used in the description of a component, N indicates component type, xn are the relative coordinates of its location on the Desktop Boards D915GEV and D915GRF, 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 PCI Bus Terminology Change ....................................................................................11 1.2 Overview ....................................................................................................................12 1.2.1 Feature Summary ........................................................................................12 1.2.2 Manufacturing Options.................................................................................13 1.2.3 Board Layout................................................................................................14 1.2.4 Block Diagram..............................................................................................16 1.3 Online Support ...........................................................................................................17 1.4 Processor...................................................................................................................17 1.5 System Memory .........................................................................................................18 1.5.1 Memory Configurations ................................................................................19 ® 1.6 Intel 915G Chipset....................................................................................................23 1.6.1 Intel 915G Graphics Subsystem...................................................................23 1.6.2 USB .............................................................................................................25 1.6.3 IDE Support .................................................................................................25 1.6.4 Real-Time Clock, CMOS SRAM, and Battery...............................................27 1.7 PCI Express Connectors ............................................................................................27 1.8 I/O Controller..............................................................................................................28 1.8.1 Serial Ports ..................................................................................................28 1.8.2 Parallel Port .................................................................................................28 1.8.3 Diskette Drive Controller ..............................................................................28 1.8.4 Keyboard and Mouse Interface ....................................................................28 1.9 Audio Subsystem .......................................................................................................29 1.9.1 Audio Subsystem Software ..........................................................................29 1.9.2 Audio Connectors.........................................................................................29 ® 1.9.3 Intel High Definition Audio Subsystem.......................................................30 1.10 LAN Subsystem..........................................................................................................31 1.10.1 10/100 Mbits/sec LAN Subsystem ...............................................................31 1.10.2 Gigabit LAN Subsystem ...............................................................................32 1.10.3 Alert Standard Format (ASF) Support ..........................................................33 1.10.4 LAN Subsystem Software ............................................................................34 1.11 Hardware Management Subsystem ...........................................................................34 1.11.1 Hardware Monitoring and Fan Control ASIC ................................................34 1.11.2 Thermal Monitoring ......................................................................................35 1.11.3 Fan Monitoring .............................................................................................36 1.11.4 Chassis Intrusion and Detection...................................................................36 1.12 Power Management ...................................................................................................36 1.12.1 ACPI ............................................................................................................37 1.12.2 Hardware Support........................................................................................39 1.13 Trusted Platform Module ............................................................................................43 1.13.1 System Requirements..................................................................................43 1.13.2 Warning of Potential Data Loss....................................................................43 1.13.3 Security Precautions ....................................................................................44 v Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.13.4 Trusted Platform Module Ownership............................................................45 1.13.5 Enabling the Trusted Platform Module .........................................................46 1.13.6 Assuming Trusted Platform Module Ownership ...........................................46 1.13.7 Recovery Procedures...................................................................................47 1.13.8 Clearing Trusted Platform Module Ownership..............................................48 1.13.9 Software Support .........................................................................................49 2 Technical Reference 2.1 Introduction ................................................................................................................51 2.2 Memory Resources ....................................................................................................51 2.2.1 Addressable Memory ...................................................................................51 2.2.2 Memory Map................................................................................................53 2.3 DMA Channels ...........................................................................................................53 2.4 Fixed I/O Map.............................................................................................................54 2.5 PCI Configuration Space Map ....................................................................................55 2.6 Interrupts....................................................................................................................56 2.7 PCI Conventional Interrupt Routing Map ....................................................................57 2.8 Connectors.................................................................................................................59 2.8.1 Back Panel Connectors................................................................................60 2.8.2 Component-side Connectors........................................................................62 2.9 Jumper Block .............................................................................................................71 2.10 Mechanical Considerations.........................................................................................72 2.10.1 Form Factor .................................................................................................72 2.10.2 I/O Shield .....................................................................................................73 2.11 Electrical Considerations ............................................................................................74 2.11.1 DC Loading..................................................................................................74 2.11.2 Add-in Board Considerations .......................................................................74 2.11.3 Fan Connector Current Capability................................................................74 2.11.4 Power Supply Considerations ......................................................................75 2.12 Thermal Considerations .............................................................................................76 2.13 Reliability....................................................................................................................78 2.14 Environmental ............................................................................................................79 2.15 Regulatory Compliance ..............................................................................................80 2.15.1 Safety Regulations.......................................................................................80 2.15.2 EMC Regulations .........................................................................................80 2.15.3 European Union Declaration of Conformity Statement .................................81 2.15.4 Product Ecology Statements........................................................................82 2.15.5 Product Certification Markings (Board Level) ...............................................83 3 Overview of BIOS Features 3.1 Introduction ................................................................................................................85 3.2 BIOS Flash Memory Organization..............................................................................86 3.3 Resource Configuration..............................................................................................86 3.3.1 PCI Autoconfiguration ..................................................................................86 3.3.2 PCI IDE Support ..........................................................................................86 3.4 System Management BIOS (SMBIOS).......................................................................87 3.5 Legacy USB Support..................................................................................................87 vi Contents 3.6 BIOS Updates ............................................................................................................88 3.6.1 Language Support........................................................................................88 3.6.2 Custom Splash Screen ................................................................................88 3.7 Boot Options ..............................................................................................................89 3.7.1 CD-ROM Boot..............................................................................................89 3.7.2 Network Boot ...............................................................................................89 3.7.3 Booting Without Attached Devices ...............................................................89 3.7.4 Changing the Default Boot Device During POST .........................................89 ® 3.8 Fast Booting Systems with Intel Rapid BIOS Boot....................................................90 3.8.1 Peripheral Selection and Configuration ........................................................90 3.8.2 Intel Rapid BIOS Boot..................................................................................90 3.9 BIOS Security Features..............................................................................................91 4 Error Messages and Beep Codes 4.1 BIOS Error Messages ................................................................................................93 4.2 Port 80h POST Codes................................................................................................95 4.3 Bus Initialization Checkpoints.....................................................................................99 4.4 Speaker....................................................................................................................100 4.5 BIOS Beep Codes ....................................................................................................100 Figures 1 Board Components ....................................................................................................14 2 Block Diagram............................................................................................................16 3. Memory Channel and DIMM Configuration.................................................................19 4. Dual Channel (Interleaved) Mode Configuration with Two DIMMs..............................20 5. Dual Channel (Interleaved) Mode Configuration with Three DIMMs ...........................20 6. Dual Channel (Interleaved) Mode Configuration with Four DIMMs .............................21 7. Single Channel (Asymmetric) Mode Configuration with One DIMM............................22 8. Single Channel (Asymmetric) Mode Configuration with Three DIMMs........................22 9. Front/Back Panel Audio Connector Options for High Definition Audio Subsystem......30 10. High Definition Audio Subsystem Block Diagram........................................................30 11. LAN Connector LED Locations...................................................................................31 12. LAN Connector LED Locations...................................................................................32 13. Thermal Monitoring ....................................................................................................35 14. Location of the Standby Power Indicator LED ............................................................42 15. Detailed System Memory Address Map......................................................................52 16. Back Panel Connectors..............................................................................................60 17. Component-side Connectors......................................................................................62 18. Connection Diagram for Front Panel Connector .........................................................68 19. Connection Diagram for Front Panel USB Connectors...............................................70 20. Connection Diagram for IEEE 1394a Connectors.......................................................70 21. Location of the Jumper Block .....................................................................................71 22. Board Dimensions ......................................................................................................72 23. I/O Shield Dimensions................................................................................................73 24. Processor Heatsink Airflow.........................................................................................76 25. Localized High Temperature Zones............................................................................77 vii Intel Desktop Board D915GEV/D915GRF Technical Product Specification Tables 1. Feature Summary.......................................................................................................12 2. Manufacturing Options ...............................................................................................13 3. Board Components Shown in Figure 1.......................................................................15 4. Supported Memory Configurations .............................................................................18 5. LAN Connector LED States........................................................................................32 6. LAN Connector LED States........................................................................................33 7. Effects of Pressing the Power Switch .........................................................................37 8. Power States and Targeted System Power ................................................................38 9. Wake-up Devices and Events.....................................................................................39 10. System Memory Map .................................................................................................53 11. DMA Channels ...........................................................................................................53 12. I/O Map ......................................................................................................................54 13. PCI Configuration Space Map ....................................................................................55 14. Interrupts....................................................................................................................56 15. PCI Interrupt Routing Map..........................................................................................58 16. Back Panel Connectors Shown in Figure 16...............................................................61 17. Component-side Connectors Shown in Figure 17 ......................................................63 18. S/PDIF Connector (Optional)......................................................................................64 19. ATAPI CD-ROM Connector (Optional) .......................................................................64 20. Front Panel Audio Connector .....................................................................................64 21. Serial Port B Connector (optional) ..............................................................................64 22. Chassis Intrusion Connector ......................................................................................64 23. SCSI Hard Drive Activity LED Connector (Optional)...................................................65 24. Serial ATA Connectors...............................................................................................65 25. Processor Fan Connector...........................................................................................65 26. Chassis Fan Connectors ............................................................................................65 27. Main Power Connector...............................................................................................66 28. ATX12V Power Connector .........................................................................................67 29. Alternate Power Connector ........................................................................................67 30. Auxiliary Front Panel Power/Sleep LED Connector ....................................................68 31. Front Panel Connector ...............................................................................................68 32. States for a One-Color Power LED.............................................................................69 33. States for a Two-Color Power LED.............................................................................69 34. BIOS Setup Configuration Jumper Settings................................................................71 35. DC Loading Characteristics........................................................................................74 36. Fan Connector Current Capability ..............................................................................74 37. Thermal Considerations for Components ...................................................................78 38. Environmental Specifications......................................................................................79 39. Safety Regulations .....................................................................................................80 40. EMC Regulations .......................................................................................................80 41. Product Certification Markings....................................................................................83 42. BIOS Setup Program Menu Bar .................................................................................86 43. BIOS Setup Program Function Keys ..........................................................................86 44. Boot Device Menu Options.........................................................................................89 45. Supervisor and User Password Functions..................................................................91 46. BIOS Error Messages ................................................................................................93 viii Contents 47. Uncompressed INIT Code Checkpoints......................................................................95 48. Boot Block Recovery Code Checkpoints ....................................................................95 49. Runtime Code Uncompressed in F000 Shadow RAM ................................................96 50. Bus Initialization Checkpoints.....................................................................................99 51. Upper Nibble High Byte Functions..............................................................................99 52. Lower Nibble High Byte Functions............................................................................100 53. Beep Codes .............................................................................................................100 ix Intel Desktop Board D915GEV/D915GRF Technical Product Specification x 1 Product Description What This Chapter Contains 1.1 PCI Bus Terminology Change ....................................................................................11 1.2 Overview ....................................................................................................................12 1.3 Online Support ...........................................................................................................17 1.4 Processor...................................................................................................................17 1.5 System Memory .........................................................................................................18 ® 1.6 Intel 915G Chipset....................................................................................................23 1.7 PCI Express Connectors ............................................................................................27 1.8 I/O Controller..............................................................................................................28 1.9 Audio Subsystem .......................................................................................................29 1.10 LAN Subsystem..........................................................................................................31 1.11 Hardware Management Subsystem ...........................................................................34 1.12 Power Management ...................................................................................................36 1.13 Trusted Platform Module ............................................................................................43 1.1 PCI Bus Terminology Change ® Previous generations of Intel Desktop Boards used an add-in card connector referred to as PCI. This generation of Intel Desktop Boards adds a new technology for add-in cards: PCI Express. The 32-bit parallel bus previously referred to as PCI is now called PCI Conventional. 11 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.2 Overview 1.2.1 Feature Summary Table 1 summarizes the major features of the Desktop Boards D915GEV and D915GRF. Table 1. Feature Summary Form Factor ATX (12.00 inches by 9.60 inches [304.80 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 240-pin DDR2 SDRAM Dual Inline Memory Module (DIMM) sockets  Support for DDR2 533 MHz or DDR2 400 MHz DIMMs  Support for up to 4 GB of system memory ® Chipset Intel 915G Chipset, consisting of: ®  Intel 82915G Graphics Memory Controller Hub (GMCH) ®  Intel 82801FB I/O Controller Hub (ICH6)  4 Mbit Firmware Hub (FWH) ® Video Intel GMA900 onboard graphics subsystem ® Audio Intel High Definition Audio subsystem using the Realtek ALC860 audio codec I/O Control LPC Bus I/O controller USB Support for USB 2.0 devices Peripheral  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 The board provides one of the following:  Gigabit (10/100/1000 Mbits/sec) LAN subsystem using the Marvell* Yukon* 88E8050 PCI Express* Gigabit Ethernet Controller ®  10/100 Mbits/sec LAN subsystem using the Intel 82562EZ 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 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 continued 12 Product Description Table 1. Feature Summary (continued) Expansion  Four PCI Conventional bus add-in card connectors (SMBus routed to PCI Capabilities Conventional bus connector 2)  Two PCI Express x1 bus add-in card connectors  One PCI Express x16 bus add-in card connector 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 1.2.2 Manufacturing Options Table 2 describes the manufacturing options on the Desktop Boards D915GEV and D915GRF. Not every manufacturing option is available in all marketing channels. Please contact your Intel representative to determine which manufacturing options are available to you. Table 2. Manufacturing Options ATAPI CD-ROM A connector for attaching an internal CD-ROM drive to the onboard audio subsystem Connector ATX Fan Additional fan connector for use in larger chassis Connector IEEE-1394a IEEE-1394a controller and three IEEE-1394a connectors (one back panel connector, Interface two front-panel connectors) SCSI Hard Drive Allows add-in hard drive controllers (SCSI or other) to use the same LED as the Activity LED onboard IDE controller Connector Serial Port B Second serial port accessible via a connector on the component side of the board S/PDIF Connector A 1 x 3 connector (mounted on the component side of the board) that provides digital audio signals in S/PDIF format For information about Refer to Available configurations for the Desktop Boards D915GEV and D915GRF Section 1.3, page 17 13 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.2.3 Board Layout Figure 1 shows the location of the major components on the Desktop Board D915GEV/D915GRF. A B D F G H I J K L C E M N O MM LL KK P JJ Q R S II T U HH FF DD BB GG EE CC AA Z Y X W V OM16666 Figure 1. Board Components Table 3 lists the components identified in Figure 1. 14 Product Description Table 3. Board Components Shown in Figure 1 Item/Callout from Figure 1 Description A Rear chassis fan connector 2 B Speaker C PCI Express x1 bus add-in card connectors D ATAPI CD-ROM connector (optional) E S/PDIF connector (optional) F Realtek ALC860 audio codec G Front panel audio connector H PCI Conventional bus add-in card connectors I Ethernet PLC device (optional) J PCI Express x16 bus add-in card connector K Rear chassis fan connector 1 L Back panel connectors M Alternate power connector N +12V power connector (ATX12V) O LGA775 processor socket P Processor fan connector Q Intel 82915G GMCH R DIMM Channel A sockets S Serial port B connector (optional) T DIMM Channel B sockets U SCSI LED (optional) V I/O controller W Power connector X Diskette drive connector Y Parallel ATE IDE connector Z Battery AA Chassis intrusion connector BB BIOS Setup configuration jumper block CC 4 Mbit Firmware Hub (FWH) DD Front chassis fan connector EE Serial ATA connectors FF Auxiliary front panel power LED connector GG Front panel connector HH ATX fan connector (optional) II Front panel USB connector JJ Intel 82801FB I/O Controller Hub (ICH6) KK Front panel IEEE-1394a connectors (optional) LL IEEE-1394a controller (optional) MM PCI Conventional bus add-in card connectors 15 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.2.4 Block Diagram Figure 2 is a block diagram of the major functional areas of the boards. Gigabit Ethernet LAN PCI Express x1 Interface Controller (Optional) Connector PCI Express x1 Slot 1 Back Panel/Front Panel USB USB Ports PCI Express x1 Slot 2 Serial Ports LPC Bus Parallel Port Parallel ATA Parallel ATA I/O PS/2 Mouse IDE Connector IDE Interface Controller PS/2 Keyboard LGA775 System Bus Diskette Drive Processor Socket (800/533 MHz) Connector LPC Bus PCI Express x16 Interface Intel 82915G Intel 82801FB 4 Mbit Graphics and I/O Controller Hub Firmware Hub PCI Express Memory Controller (ICH6) (FWH) x16 Hub (GMCH) Connector Intel 915G Chipset VGA Display Interface Port TPM Component (Optional) Dual-Channel Memory Bus Channel A SMBus DIMMs (2) 10/100 LAN LAN PLC Connector Channel B (Optional) DIMMs (2) IEEE-1394a Connectors Serial ATA Serial ATA IDE PCI Bus (Optional) IDE Interface Connectors (4) PCI Bus Mic In/Retasking Jack B PCI Slot 1 Line In/Retasking Jack C Line Out/Retasking Jack D PCI Slot 2 SMBus Audio Retasking Jack E [Port 1] PCI Slot 3 Codec Retasking Jack F [Port 2] Hardware Monitoring PCI Slot 4 CD-ROM (optional) and Fan Control ASIC S/PDIF (optional) = connector or socket OM16995 Figure 2. Block Diagram 16 DMI Interconnect High Definition Audio Link LAN Connect Interface LPC Bus Product Description 1.3 Online Support To find information about… Visit this World Wide Web site: Intel Desktop Boards D915GEV and http://www.intel.com/design/motherbd D915GRF under “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/ev/ev_available.htm Board D915GEV Available configurations for the Desktop http://developer.intel.com/design/motherbd/rf/rf_available.htm Board D915GRF Processor data sheets http://www.intel.com/design/litcentr ICH6 addressing http://developer.intel.com/design/chipsets/datashts Custom splash screens http://intel.com/design/motherbd/gen_indx.htm Audio software and utilities http://www.intel.com/design/motherbd LAN software and drivers http://www.intel.com/design/motherbd 1.4 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 D915GEV board http://www.intel.com/design/motherbd/ev/ev_proc.htm Supported processors for the D915GRF board http://www.intel.com/design/motherbd/rf/rf_proc.htm CAUTION Use only the processors listed on web site above. Use of unsupported processors can damage the board, the processor, and the power supply. INTEGRATOR’S NOTE
Use only ATX12V-compliant power supplies. For information about Refer to Power supply connectors Section 2.8.2.2, page 65 17 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.5 System Memory The boards have four DIMM sockets and support the following memory features:  1.8 V (only) DDR2 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 51 for information on the total amount of addressable memory.  Minimum total system memory: 128 MB  Non-ECC DIMMs  Serial Presence Detect  DDR2 533 MHz or DDR2 400 MHz SDRAM DIMMs NOTES  Remove the PCI Express x16 video card before installing or upgrading memory to avoid interference with the memory retention mechanism.  To be fully compliant with all applicable DDR SDRAM memory specifications, the board should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. This allows the BIOS to read the SPD data and program the chipset to accurately configure memory settings for optimum performance. If non-SPD memory is installed, the BIOS will attempt to correctly configure the memory settings, but performance and reliability may be impacted or the DIMMs may not function under the determined frequency. Table 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 51 for additional information on available memory. 18 Product Description 1.5.1 Memory Configurations The Intel 82915G 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 OM16667 Figure 3. Memory Channel and DIMM Configuration 19 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.5.1.1 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 20 Product Description 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 21 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.5.1.2 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 22 Product Description ® 1.6 Intel 915G Chipset The Intel 915G chipset consists of the following devices:  Intel 82915G Graphics Memory Controller Hub (MCH) with Direct Media Interface (DMI) interconnect  Intel 82801FB I/O Controller Hub (ICH6) with DMI interconnect  Firmware Hub (FWH) The MCH is a centralized controller for the system bus, the memory bus, the PCI Express bus, and the DMI interconnect. The ICH6 is a centralized controller for the board’s I/O paths. The FWH provides the nonvolatile storage of the BIOS. For information about Refer to The Intel 915G chipset http://developer.intel.com/ Resources used by the chipset Chapter 2 1.6.1 Intel 915G Graphics Subsystem The Intel 915G chipset contains two separate, mutually exclusive graphics options. Either the GMA900 graphics controller (contained within the 82915G GMCH) is used, or a PCI Express x16 add-in card can be used. When a PCI Express x16 add-in card is installed, the GMA900 graphics controller is disabled. ® 1.6.1.1 Intel GMA900 Graphics Controller ® The Intel GMA900 graphics controller features the following:  Integrated graphics controller  32 bpp (Bits Per Pixel) graphics engine  333 MHz core frequency  256-bit 2-D engine  32-bit 3-D engine  Motion video acceleration  Pixel Shader 2.0  4-pixel pipes  DirectX* 9.0 Hardware Acceleration  Software Vertex Shader  Up to 2048 x 1536 at 75 Hz refresh  With Advanced Digital Display 2 (ADD2) card support flat panel displays up to 2048 x 1536 at 75 Hz or digital CRTs/HDTV displays at 1920 x 1080 at 85 Hz  High performance 3-D setup and render engine  High quality/performance texture engine  Display  Integrated 24-bit 400 MHz RAMDAC  DDC2B compliant interface 23 Intel Desktop Board D915GEV/D915GRF Technical Product Specification  Video  Asynchronous dual monitor display with ADD2 card  Hardware motion compensation for software MPEG2 decode  Two multiplexed DVO port interfaces with 200 MHz pixel clocks using an ADD2 card  Dynamic Video Memory Technology (DVMT) support up to 224 MB ®  Intel Zoom Utility For information about Refer to DVMT Section 1.6.1.2, page 24 Obtaining graphics software and utilities Section 1.3, page 17 1.6.1.2 Dynamic Video Memory Technology (DVMT) DVMT enables enhanced graphics and memory performance through Direct AGP, and highly efficient memory utilization. DVMT ensures the most efficient use of available system memory for maximum 2-D/3-D graphics performance. Up to 224 MB of system memory can be allocated to DVMT on systems that have 512 MB or more of total system memory installed. Up to 128 MB can be allocated to DVMT on systems that have 256 MB but less than 512 MB of total installed system memory. Up to 64 MB can be allocated to DVMT when less than 256 MB of system memory is installed. DVMT returns system memory back to the operating system when the additional system memory is no longer required by the graphics subsystem. DVMT will always use a minimal fixed portion of system physical memory (as set in the BIOS Setup program) for compatibility with legacy applications. An example of this would be when using VGA graphics under DOS. Once loaded, the operating system and graphics drivers allocate additional system memory to the graphics buffer as needed for performing graphics functions. NOTE The use of DVMT requires operating system driver support. 1.6.1.3 Advanced Digital Display 2 (ADD2) Card Support The GMCH routes two multiplexed DVO ports that are each capable of driving up to a 200 MHz pixel clock to the PCI Express x16 connector. The DVO ports can be paired for a dual channel configuration to support up to a 400 MHz pixel clock. When an ADD2 card is detected, the Intel GMA900 graphics controller is enabled and the PCI Express x16 connector is configured for DVO mode. DVO mode enables the DVO ports to be accessed by the ADD2 card. An ADD2 card can either be configured to support simultaneous display with the primary VGA display or can be configured to support dual independent display as an extended desktop configuration with different color depths and resolutions. ADD2 cards can be designed to support the following configurations:  TV-Out (composite video)  Transition Minimized Differential Signaling (TMDS) for DVI 1.0  Low Voltage Differential Signaling (LVDS)  Single device operating in dual channel mode  VGA output  HDTV output 24 Product Description 1.6.1.4 Configuration Modes A list of supported modes for the Intel GMA900 graphics controller is available as a downloadable document. For information about Refer to Supported modes for the D915GEV board http://www.intel.com/design/motherbd/ev/ev_prdoc.htm Supported modes for the D915GRF board http://www.intel.com/design/motherbd/rf/rf_prdoc.htm 1.6.2 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 16, page 60 The location of the front panel USB connectors Figure 17, page 62 1.6.3 IDE Support The board 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 1.6.3.1 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. 25 Intel Desktop Board D915GEV/D915GRF Technical Product Specification / 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 17, page 62 1.6.3.2 Serial ATA Interfaces The ICH6’s Serial ATA controller offers four independent Serial ATA ports with a theoretical maximum transfer rate of 150 MB/s per port. One device can be installed on each port for a maximum of four Serial ATA devices. A point-to-point interface is used for host to device connections, unlike Parallel ATA IDE which supports a master/slave configuration and two devices per channel. For compatibility, the underlying Serial ATA functionality is transparent to the operating system. The Serial ATA controller can operate in both legacy and native modes. In legacy mode, standard IDE I/O and IRQ resources are assigned (IRQ 14 and 15). In Native mode, standard PCI Conventional bus resource steering is used. Native mode is the preferred mode for configurations using the Windows* XP and Windows 2000 operating systems. NOTE Many Serial ATA drives use new low-voltage power connectors and require adaptors or power supplies equipped with low-voltage power connectors. For more information, see: http://www.serialata.org/ For information about Refer to The location of the Serial ATA IDE connectors Figure 17, page 62 26 Product Description 1.6.3.3 SCSI Hard Drive Activity LED Connector (Optional) The SCSI hard drive activity LED connector is a 1 x 2-pin connector that allows an add-in hard drive controller to use the same LED as the onboard IDE controller. For proper operation, this connector should be wired to the LED output of the add-in hard drive controller. The LED indicates when data is being read from, or written to, either the add-in hard drive controller or the onboard IDE controller (Parallel ATA or Serial ATA). For information about Refer to The location of the SCSI hard drive activity LED connector Figure 17, page 62 The signal names of the SCSI hard drive activity LED connector Table 23, page 65 1.6.4 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. 1.7 PCI Express Connectors The boards provide the following PCI Express connectors:  One PCI Express x16 connector supporting simultaneous transfer speeds up to 8 GBytes/sec  Two PCI Express x1 connectors. The x1 interfaces support simultaneous transfer speeds up to 500 MBytes/sec The PCI Express interface supports the PCI Conventional bus configuration mechanism so that the underlying PCI Express architecture is compatible with PCI Conventional compliant operating systems. Additional features of the PCI Express interface includes 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 27 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.8 I/O Controller The I/O controller provides the following features:  Two serial ports (Serial Port B is optional)  One parallel port with Extended Capabilities Port (ECP) and Enhanced Parallel Port (EPP) support  Serial IRQ interface compatible with serialized IRQ support for PCI Conventional bus systems  PS/2-style mouse and keyboard interfaces  Interface for one 1.44 MB or 2.88 MB diskette drive  Intelligent power management, including a programmable wake-up event interface  PCI Conventional bus power management support The BIOS Setup program provides configuration options for the I/O controller. 1.8.1 Serial Ports The Desktop Board can support up to two serial port connectors. Serial port A is located on the back panel. Serial port B (optional) is accessible using a connector on the component side of board. The serial ports support data transfers at speeds up to 115.2 kbits/sec with BIOS support. For information about Refer to The location of the serial port A connector Figure 16, page 60 The location of the serial port B connector Figure 17, page 62 The signal names of the serial port B connector Table 21, page 64 1.8.2 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 16, page 60 1.8.3 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 17, page 62 1.8.4 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. 28 Product Description 1.9 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. 1.9.1 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 1.3, page 17 1.9.2 Audio Connectors The boards contain audio connector on both the back panel and the component side of the board. The component-side audio connectors include the following: • Front panel audio (a 2 x 5-pin connector that provides mic in and line out signals for front panel audio connectors) • ATAPI CD-ROM (an optional 1 x 4-pin ATAPI-style connector for connecting an internal ATAPI CD-ROM drive to the audio mixer) • S/PDIF (an optional 1 x 3 connector that provides S/PDIF output signals) The functions of the back panel audio connectors are dependent on which subsystem is present. For information about Refer to The location of the front panel audio connector, the optional ATAPI CD-ROM Figure 17, page 62 connector, and the optional S/PDIF connector. The signal names of the front panel audio connector Table 20, page 64 The signal names of the optional ATAPI CD-ROM connector Table 19, page 64 The signal names of the optional S/PDIF connector Table 18, page 64 29 Intel Desktop Board D915GEV/D915GRF Technical Product Specification ® 1.9.3 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. Back Panel Front 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 Line In/Retasking Jack C 82801FB Line Out/Retasking Jack D Intel I/O Controller ALC860 High Definition Front Panel Mic In/Retasking Jack E [Port 1] Hub Audio Codec Audio Link Front Panel Line Out/Retasking Jack F [Port 2] (ICH6) CD-ROM (optional) S/PDIF (optional) OM16990 Figure 10. High Definition Audio Subsystem Block Diagram For information about Refer to The back panel audio connectors Figure 16, page 60 30 Product Description 1.10 LAN Subsystem The LAN subsystem consists of the following:  Physical layer interface device. As a manufacturing option, the board includes one of the following Platform LAN Connect (PLC) devices: ®  Intel 82562EZ PLC for 10/100 Mbits/sec Ethernet LAN connectivity  Marvell Yukon 88E50 for Gigabit (10/100/1000 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 82562EZ  PCI Conventional bus power management  Supports ACPI technology  Supports LAN wake capabilities 1.10.1 10/100 Mbits/sec LAN Subsystem The 10/100 Mbits/sec LAN subsystem includes the ICH6, the Intel 82562EZ PLC, and an RJ-45 LAN connector with integrated status LEDs. ® 1.10.1.1 Intel 82562EZ Physical Layer Interface Device The Intel 82562EZ provides the following functions:  Basic 10/100 Ethernet LAN connectivity  Full device driver compatibility  Programmable transit threshold  Configuration EEPROM that contains the MAC address 1.10.1.2 RJ-45 LAN Connector with Integrated LEDs Two LEDs are built into the RJ-45 LAN connector (shown in Figure 11 below). Green LED Yellow LED OM15076 Figure 11. LAN Connector LED Locations 31 Intel Desktop Board D915GEV/D915GRF 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. 1.10.2 Gigabit LAN Subsystem The Gigabit (10/100/1000 Mbits/sec) LAN subsystem includes the Marvell Yukon 88E50 and an RJ-45 LAN connector with integrated status LEDs. 1.10.2.1 Marvell Yukon 88E8050 PCI Express 1.0a Integrated MAC/PHY Gigabit Ethernet Controller The Marvell Yukon 88E8050 provides the following functions:  x1 PCI Express link  Basic 10/100/1000 Ethernet LAN connectivity  IEEE 802.1p and 802.1q support  10/100/1000 IEEE 802.3 compliant  Compliant to 802.3x flow control support  Jumbo frame support  TCP, IP, UDP checksum offload  Automatic MDI/MDIX crossover  Full device driver compatibility  Configuration EEPROMs that contain the MAC address and ASF 2.0 support  Wake On LAN technology power management support  PCI Express Active State Power Management Support (L0s)  ASF 2.0 support 1.10.2.2 RJ-45 LAN Connector with Integrated LEDs Two LEDs are built into the RJ-45 LAN connector (as shown in Figure 12). Table 6 describes the LED states when the board is powered up and the Gigabit LAN subsystem is operating. Green LED Green/Yellow LED OM16513 Figure 12. LAN Connector LED Locations 32 Product Description Table 6. LAN Connector LED States LED Color LED State Condition Off LAN link is not established. Left Green On LAN link is established. Blinking LAN activity is occurring. N/A Off 10 Mbits/sec data rate is selected. Right Green On 100 Mbits/sec data rate is selected. Yellow 1000 Mbits/sec data rate is selected. On 1.10.3 Alert Standard Format (ASF) Support The boards provide the following ASF support for the onboard 10/100/1000 LAN subsystem, PCI Express x1 bus add-in LAN cards, and PCI Conventional bus add-in LAN cards installed in PCI Conventional bus slot 2:  Monitoring of system firmware progress events, including:  BIOS present  Primary processor initialization  Memory initialization  Video initialization  PCI resource configuration  Hard-disk initialization  User authentication  Starting operating system boot process  Monitoring of system firmware error events, including:  Memory missing  Memory failure  No video device  Keyboard failure  Hard-disk failure  No boot media  Boot options to boot from different types of boot devices  Reset, shutdown, power cycle, and power up options 33 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.10.4 LAN Subsystem Software LAN software and drivers are available from Intel’s World Wide Web site. For information about Refer to Obtaining LAN software and drivers Section 1.3, page 17 1.11 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 1.11.1 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 13, page 35 34 Product Description 1.11.2 Thermal Monitoring Figure 13 shows the location of the sensors and fan connectors. 13 3 1 A B C 4 D 1 13 1 3 H G F E OM16669 Item Description A Thermal diode, located on processor die B Remote ambient temperature sensor C Ambient temperature sensor, internal to hardware monitoring and fan control ASIC D Processor fan E Rear chassis fan 1 F Front chassis fan G ATX fan (optional) H Rear chassis fan 2 Figure 13. Thermal Monitoring 35 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.11.3 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 1.12.2.2, page 40 1.11.4 Chassis Intrusion and Detection The boards support a chassis security feature that detects if the chassis cover is removed. The security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion connector. When the chassis cover is removed, the mechanical switch is in the closed position. 1.12 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 36 Product Description 1.12.1 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 9 on page 39)  Support for a front panel power and sleep mode switch Table 7 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 7. 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) 37 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.12.1.1 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 8 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 8. 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 Full power > 30 W state state. G1 – sleeping S1 – Processor C1 – stop D1, D2, D3 – 5 W < power < 52.5 W state stopped grant device specification specific. (Note 2) G1 – sleeping S3 – Suspend to No power D3 – no power Power < 5 W state RAM. Context except for saved to RAM. wake-up logic. (Note 2) G1 – sleeping S4 – Suspend to No power D3 – no power Power < 5 W state disk. Context except for saved to disk. wake-up logic. (Note 2) G2/S5 S5 – Soft off. No power D3 – no power Power < 5 W Context not saved. except for Cold boot is wake-up 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 performed except when safely. AC power is provided by disconnected battery or external from the source. 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. 38 Product Description 1.12.1.2 Wake-up Devices and Events Table 9 lists the devices or specific events that can wake the computer from specific states. Table 9. 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# 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. 1.12.2 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. 39 Intel Desktop Board D915GEV/D915GRF Technical Product Specification Resume on Ring enables telephony devices to access the computer when it is in a power-managed state. The method used depends on the type of telephony device (external or internal). NOTE / The use of Resume on Ring and Wake from USB technologies from an ACPI state requires an operating system that provides full ACPI support. 1.12.2.1 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 17, page 62 The signal names of the main power connector Table 27, page 66 1.12.2.2 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 Figure 17, page 62 The location of the fan connectors and sensors for thermal monitoring Figure 13, page 35 The signal names of the processor fan connector Table 25, page 65 The signal names of the chassis fan connectors Table 26, page 65 1.12.2.3 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 40 Product Description Magic Packet* frame, the LAN subsystem asserts a wake-up signal that powers up the computer. Depending on the LAN implementation, the boards support LAN wake capabilities with ACPI in the following ways:  The PCI Express WAKE# signal  The PCI Conventional bus PME# signal for PCI 2.2 compliant LAN designs  The onboard LAN subsystem 1.12.2.4 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 9 on page 39 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. 1.12.2.5 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 1.12.2.6 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. 1.12.2.7 Wake from PS/2 Devices PS/2 device activity wakes the computer from an ACPI S1 or S3 state. 1.12.2.8 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). 41 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.12.2.9 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. 1.12.2.10 +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 14 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 OM16668 Figure 14. Location of the Standby Power Indicator LED 42 Product Description 1.13 Trusted Platform Module The optional Trusted Platform Module (TPM) is a component on the desktop board that is specifically designed to enhance platform security above-and-beyond the capabilities of today’s software by providing a protected space for key operations and other security critical tasks. Using both hardware and software, the TPM protects encryption and signature keys at their most vulnerable stages—operations when the keys are being used unencrypted in plain-text form. The TPM is specifically designed to shield unencrypted keys and platform authentication information from software-based attacks. 1.13.1 System Requirements  Intel Desktop Board D915GEV or D915GRF  Microsoft Windows 2000 Professional (SP4) or Microsoft Windows XP Professional (SP1)  NTFS file system required  Microsoft Internet Explorer* 5.5 or later  Adobe* Acrobat* 5.0 or later 1.13.2 Warning of Potential Data Loss CAUTION Failure to follow the instructions below may cause you to lose data. Read and follow these instructions prior to Trusted Platform Module initialization. System integrators, owners, and end users must take precautions to mitigate the chance of data loss. Data encrypted by any program utilizing the Trusted Platform Module (TPM) may become inaccessible or unrecoverable if any of the following occurs:  Lost Password: Loss of any of the passwords associated with the TPM will render encrypted data inaccessible. No password recovery is available. Read the Security Precautions for Password Procedures.  Hard Drive Failure: In the event of a failure of a hard disk (or other storage media) that contains encrypted data, an image of the hard disk (or other storage media) must be restored from backup before access to encrypted data may become available. The owner/user should backup the system hard disk on a regular basis. Read the Security Precautions below for Hard Drive Backup Procedures.  Platform Failure: In the event of a platform failure and/or replacement of the motherboard, recovery procedures may allow migratable keys to be recovered and may restore access to encrypted data. All non-migratable keys and their associated data will be lost. Both the Infineon* Security Platform software and Wave Systems EMBASSY Trust Suite utilize migratable keys. Please check any other software that accesses the TPM for migratability. Read the Security Precautions for Emergency Recovery File Back Up Procedures.  Loss of Trusted Platform Module Ownership: Trusted Platform Module Ownership/contents may be cleared (via a BIOS switch) to allow for the transfer of a system to a new owner. If TPM ownership is cleared, either intentionally or in error, recovery procedures may allow the migratable keys to be recovered and may restore access to encrypted data. Read the Security Precautions for Emergency Recovery File Back Up Procedures. 43 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.13.3 Security Precautions Security, like any other aspect of computer maintenance requires planning. What is unique about security has to do with understanding who "friends" and adversaries are. The TPM provides mechanisms to enable the owner/user to protect their information from adversaries. To provide this protection the TPM effectively puts "locks" around the data. Just like physical locks, if keys or combinations are lost, the assets (i.e., data) may be inaccessible not only to adversaries, but also to asset owner/user. The TPM provides two classes of keys: migratable and non-migratable. Migratable keys are designed to protect data that can be used (i.e., unencrypted) on more than one platform. This has the advantage of allowing the key data to be replicated (backed-up and restored) to another platform. This may be because of user convenience (someone uses more than one platform, or the data needs to be available to more than one person operating on different platforms). This type of key also has the advantage in that it can be backed-up and restored from a defective platform onto a new platform. However, migratable keys may not be the appropriate level of protection (e.g., the user wants the data restricted to a single platform) needed for the application. This requires a non- migratable key. Non-migratable keys carry with them a usage deficit in that while the key may be backed-up and restored (i.e., protected from hard disk failure) they are not protected against system or TPM failure. The very nature of a non-migratable key is that they can be used on one and only one TPM. In the event of a system or TPM failure, all non-migratable keys and the data associated with them will be inaccessible and unrecoverable. CAUTION The following precautions and procedures may assist in recovering from any of the previously listed situations. Failure to implement these security precautions and procedures may result in unrecoverable data loss. 1.13.3.1 Password Procedures The Infineon Security Platform software allows users to configure passwords from 6 to 255 characters. A good password should consist of:  At least one upper case letter (A to Z)  At least one numerical character (0 to 9)  At least one symbol character (!, @, &, etc.) Example Passwords: “I wear a Brown hat 2 worK @ least once-a-month” or “uJGFak&%)adf35a9m” NOTE Avoid using names or dates that can be easily guessed such as: birthdays, anniversaries, family member names, pet names, etc. All passwords associated with the Infineon Security Platform software (Owner, Emergency Recovery Token, and User passwords) and the Wave Systems* EMBASSY* Trust Suite are NOT RECOVERABLE and cannot be reset without the original text. The system owner should document all passwords, store them in a secured location (vault, safe deposit box, off-site storage, etc.), and have them available for future use. These documents should be updated after any password changes. 44 Product Description 1.13.3.2 Emergency Recovery File Back Up Procedures The Emergency Recovery Token (SPEmRecToken.xml) must be saved or moved to a removable media (floppy, USB drive, CDR, flash media, etc). Once this is done, the removable media should be stored in a secure location. DO NOT LEAVE ANY COPIES of the Emergency Recovery Token on the hard drive or within any hard drive image backups. If a copy of the Emergency Recovery Token remains on the system, it could be used to compromise the Trusted Platform Module and platform. After completing the Infineon Security Platform User Initialization Wizard, a copy of the Emergency Recovery Archive (SPEmRecArchive.xml) should be copied to a removable media and stored in a secure location. This procedure should be repeated after any password changes or the addition of a new user. 1.13.3.3 Hard Drive Image Backup Procedures To allow for emergency recovery from a hard drive failure, frequent images of the hard drive should be created and stored in a secure location. In the event of a hard drive failure, the latest image can be restored to a new hard drive and access to the encrypted data may be re-established. NOTE All encrypted and unencrypted data that was added after the last image was created will be lost. 1.13.3.4 Clear Text Backup (Optional) It is recommended that system owners follow the Hard Drive Image Backup Procedures. To backup select files without creating a drive image, files can be moved from secured programs or drive letters to an unencrypted directory. The unencrypted (clear text) files may then be backed up to a removable media and stored in a secure location. The advantage of the clear text backup is that no TPM key is required to restore the data. This option is not recommended because the data is exposed during backup and restore. 1.13.4 Trusted Platform Module Ownership The Trusted Platform Module is disabled by default when shipped and the owner/end customer of the system assumes “ownership” of the TPM. This permits the owner of the system to control initialization of the TPM and create all the passwords associated with the TPM that is used to protect their keys and data. System builders/integrators may install both the Infineon Security Platform software and the Wave System EMBASSY Trust Suite, but SHOULD NOT attempt to use or activate the TPM or either software package. 45 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 1.13.5 Enabling the Trusted Platform Module The Trusted Platform Module is disabled by default when shipped to insure that the owner/end customer of the system initializes the TPM and configures all security passwords. The owner/end customer should use the following steps to enable the TPM. 1. While the PC is displaying the splash screen (or POST screen), press the key to enter BIOS. 2. Use the arrow keys to go to the Advanced Menu, select Peripheral Configuration, and then press the key. 3. Select the Trusted Platform Module, press , and select Enabled and press again (display should show: Trusted Platform Module [Enabled]). 4. Press the key, select Ok and press . 5. System should reboot and start Microsoft Windows. 1.13.6 Assuming Trusted Platform Module Ownership Once the TPM has been enabled, ownership must be assumed by using the Infineon Security Platform Software. The owner/end user should follow the steps listed below to take ownership of the TPM: 1. Start the system. 2. Launch the Infineon Security Platform Initialization Wizard. 3. Create Owner password (before creating any password, review the Password Recommendations made earlier in this document). 4. Create a new Recovery Archive (note the file name and location). 5. Specify a Security Platform Emergency Recovery Token password and location. (this password should not match the Owner password or any other password). 6. Define where to save the Emergency Recovery Token (note the file location and name). 7. The software will then create recovery archive files and finalize ownership of the TPM. 8. After completing the Infineon Security Platform Initialization Wizard, the Emergency Recovery Token (SPEmRecToken.xml) must be moved to a removable media (floppy, CDR, flash media, etc) if the file was not saved to a removable media during installation. Once this is done, the removable media should be stored in a secure location. No copies of this Emergency Recovery Token file should remain on the system. If a copy remains on the system, it could be used to compromise the security of the platform. 9. Launch the Infineon Security Platform User Initialization Wizard. 10. Create a Basic User password (this password is the most frequently used and should not match any other password). 11. Select and configure Security Platform features for this user. 12. After completing the Infineon Security Platform User Initialization Wizard, a copy of the Emergency Recovery Archive (SPEmRecArchive.xml) should be copied to a removable media and stored in a secure location. This procedure should be repeated after any password changes or the addition of new users. 13. Restart the system. 14. To backup the keys for the EMBASSY Trust Suite, the Key Transfer Manager software must be configured. Launch the Key Transfer Manager from the program menu. 46 Product Description 15. Follow the instructions and create and document the locations for both the archive and restoration key files. The key archive should be located on a removable media and stored in a secure location when not in use. 16. Create and document the password to protect the key archive. 17. Provide the TPM Owner password to allow the Key Transfer Manager to create the archive and restoration key files. 18. Upon completing the configuration of the Key Transfer Manager, it will place an icon in the task bar and automatically back up all new and updated keys associated with the EMBASSY Trust Suite. If the removable media that contains the archive file is not present when a new key is generated, then keys will have to be manually backed up using the Key Transfer Manager when the removable media is available. 19. All passwords associated with the Infineon Security Platform Software (Owner, Emergency Recovery Token, and User passwords) and Wave Systems EMBASSY Trust Suite and Key Transfer Manager are not recoverable and cannot be reset without the original text. These passwords should be documented and stored in a secured location (vault, safe deposit box, off-site storage, etc.) in case they are needed in the future. These documents and files should be updated after any password changes. 1.13.7 Recovery Procedures 1.13.7.1 Recovering from Hard Disk Failure Restore the latest hard drive image from backup to the new hard drive – no TPM specific recovery is necessary. 1.13.7.2 Recovering from Desktop Board or TPM Failure This procedure may restore the migratable keys from the Emergency Recovery Archive, and does not restore any previous keys or content to the TPM. This recovery procedure may restore access to the Infineon Security Platform software and Wave Systems EMBASSY Trust Suite that are secured with migratable keys. Requirements:  Emergency Recovery Archive (created with the Infineon Security Platform Initiation Wizard)  Emergency Recovery Token (created with the Infineon Security Platform Initiation Wizard)  Emergency Recovery Token Security Password (created with the Infineon Security Platform Initiation Wizard)  Working original operating system (OS) installation, or a restored image of the hard drive  Wave Systems Key Transfer Manager archive password  TPM Ownership password This recovery procedure only restores the migratable keys from the previously created Recovery Archives. 1. Replace the desktop board with the same model as the failed board. 2. Start the original operating system or restore the original hard drive image. 3. Start the Infineon Security Platform Initialization Wizard and check the “I want to restore the existing Security Platform” box. 47 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 4. Follow the instructions during the Security Platform Initialization, and append the Emergency Recovery Archive to the existing archive. 5. Provide all the necessary passwords, files, and file locations as requested. It may take up to 20 minutes for Security Platform Initialization Wizard to restore the security platform settings. 6. Start User Initialization Wizard. Select “Recover Your Basic User Key” when prompted. Specify the original Basic User Key password and proceed with the wizard. 7. When re-configuring the Personal Secure Drive, select “I want to change my Personal Secure Drive setting”, confirm the drive letter and name are correct, and then proceed through the rest of the wizard. 8. Restart the system when requested. 9. To restore access to the EMBASSY Trust Suite, right mouse click on the Key Transfer Manager icon located in the taskbar in the lower right corner of the screen, and select Restore TPM Keys. 10. Provide all the necessary passwords, files, and file locations as requested by the Key Transfer Manager. 11. Upon successful completion of all steps, you should be able to access previously encrypted files. 1.13.8 Clearing Trusted Platform Module Ownership WARNING Disconnect the desktop board's power supply from its AC power source before you connect or disconnect cables, or install or remove any board components. Failure to do this can result in personal injury or equipment damage. Some circuitry on the desktop board can continue to operate even though the front panel power switch is off. CAUTION DATA ENCRYPTED BY ANY PROGRAM UTILIZING THE TPM WILL BECOME INACCESSIBLE IF TPM OWNERSHIP IS CLEARED. Recovery procedures may allow the migratable keys to be recovered and might restore access to encrypted data. (Review the Recovery Procedures for detailed instructions). The TPM may be cleared to transfer ownership of the platform to a new owner. 1. Observe precautions in the above WARNING then open the system case. 2. Move the configuration jumper on the board to pins 2-3. 3. Restore power to the PC and power on. 4. System should automatically enter BIOS setup. 5. Use the arrow keys to select Clear Trusted Platform Module, press . 6. If you agree to the warning message select Ok and press . 7. Press the key to save and exit, select Ok and press . 8. Power off the system. 9. Review precautions in the WARNING above. 10. Restore the configuration jumper on the board to pins 1-2. When cleared, the TPM module is disabled by default. 48 Product Description 1.13.9 Software Support  For assistance with the Infineon Security Platform Software, visit the web at: http://www.infineon.com  For assistance with the Wave System EMBASSY Trust Suite, visit the web at: http://www.wave.com/support/ets.html  For additional information about TPM and enhancing PC security, visit: https://www.trustedcomputinggroup.org/home 49 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 50 2 Technical Reference What This Chapter Contains 2.1 Introduction ................................................................................................................51 2.2 Memory Resources ....................................................................................................51 2.3 DMA Channels ...........................................................................................................53 2.4 Fixed I/O Map.............................................................................................................54 2.5 PCI Configuration Space Map ....................................................................................55 2.6 Interrupts....................................................................................................................56 2.7 PCI Conventional Interrupt Routing Map ....................................................................57 2.8 Connectors.................................................................................................................59 2.9 Jumper Block .............................................................................................................71 2.10 Mechanical Considerations.........................................................................................72 2.11 Electrical Considerations ............................................................................................74 2.12 Thermal Considerations .............................................................................................76 2.13 Reliability....................................................................................................................78 2.14 Environmental ............................................................................................................79 2.15 Regulatory Compliance ..............................................................................................80 2.1 Introduction Sections 2.2 - 2.6 contain several standalone tables. Table 10 describes the system memory map, Table 11 lists the DMA channels, Table 12 shows the I/O map, Table 13 defines the PCI Conventional bus configuration space map, and Table 14 describes the interrupts. The remaining sections in this chapter are introduced by text found with their respective section headings. 2.2 Memory Resources 2.2.1 Addressable Memory The board utilizes 4 GB of addressable system memory. Typically the address space that is allocated for PCI Conventional bus add-in cards, PCI Express configuration space, BIOS (firmware hub), and chipset overhead resides above the top of DRAM (total system memory). On a system that has 4 GB of system memory installed, it is not possible to use all of the installed memory due to system address space being allocated for other system critical functions. These functions include the following:  BIOS/firmware hub (2 MB)  Local APIC (19 MB)  Digital Media Interface (40 MB)  Front side bus interrupts (17 MB)  PCI Express configuration space (256 MB)  MCH base address registers, internal graphics ranges, PCI Express ports (up to 512 MB) 51 Intel Desktop Board D915GEV/D915GRF Technical Product Specification  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 15 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 15. Detailed System Memory Address Map 52 Technical Reference 2.2.2 Memory Map Table 10 lists the system memory map. Table 10. 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 11. 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 53 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 2.4 Fixed I/O Map Table 12. I/O Map Address (hex) Size Description 0000 - 00FF 256 bytes Used by the Desktop Board D915GEV/D915GRF. 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 1.3 page 17 54 Technical Reference 2.5 PCI Configuration Space Map Table 13. PCI Configuration Space Map Bus Device Function Number (hex) Number (hex) Number (hex) Description 00 00 00 Memory controller of Intel 82915G component (Note 1) 00 01 00 PCI Express x16 graphics port 00 02 00 Integrated graphics controller 00 02 01 Integrated graphics controller 00 1B 00 Intel High Definition Audio Controller 00 1C 00 PCI Express port 1 (PCI Express x1 bus connector 1) 00 1C 01 PCI Express port 2 (Gigabit LAN controller, if present) 00 1C 02 PCI Express port 3 (PCI Express x1 bus connector 2) 00 1C 03 PCI Express port 4 (not used) 00 1D 00 USB UHCI controller 1 00 1D 01 USB UHCI controller 2 00 1D 02 USB UHCI controller 3 00 1D 03 USB UHCI controller 4 00 1D 07 EHCI controller 00 1E 00 PCI bridge 00 1F 00 PCI controller 00 1F 01 Parallel ATA IDE controller 00 1F 02 Serial ATA controller 00 1F 03 SMBus controller (Note 2) 00 00 PCI Conventional bus connector 1 (Note 2) 01 00 PCI Conventional bus connector 2 (Note 2) 02 00 PCI Conventional bus connector 3 (Note 2) 03 00 PCI Conventional bus connector 4 (Note 2) 08 00 Intel 82562EZ 10/100 Mbits/sec LAN PLC (if present) Notes: 1. Present only when a PCI Express x16 graphics card is installed. 2. Bus number is dynamic and can change based on add-in cards used. 55 Intel Desktop Board D915GEV/D915GRF 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 14. 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. 56 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 15 shows an example of how the PIRQ signals are routed. For example, using Table 15 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. 57 Intel Desktop Board D915GEV/D915GRF Technical Product Specification Table 15. PCI Interrupt Routing Map ICH6 PIRQ Signal Name PCI Interrupt Source PIRQA PIRQB PIRQC PIRQD PIRQE PIRQF PIRQG PIRQH IEEE-1394a controller INTA PCI bus connector 1 INTD INTA INTB INTC PCI bus connector 2 INTC INTB INTA INTD PCI bus connector 3 INTD INTC INTA INTB PCI bus connector 4 INTB INTA INTC 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 14 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. 58 Technical Reference 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 60)  Component-side I/O connectors (see page 62) 59 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 2.8.1 Back Panel Connectors Figure 16 shows the location of the back panel connectors. The back panel connectors are color-coded. The figure legend (Table 16) lists the colors used (when applicable). C F I K A B D E G H J L OM16670 Figure 16. Back Panel Connectors Table 16 lists the back panel connectors identified in Figure 16. 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. 60 Technical Reference Table 16. Back Panel Connectors Shown in Figure 16 Item/Callout from Figure 16 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 IEEE-1394a (optional) J USB ports (two) K LAN L USB ports (two) 61 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 2.8.2 Component-side Connectors Figure 17 shows the locations of the component-side connectors. B D F H J L N P AC E G I K M O 13 12 14 910 4 3 3 4 13 1 1 1 1 2 11 10 1 3 2 1 9 11 1 10 2 1 3 2 1 10 1 4 1 1 2 10 2 1 9 1 1 24 2 23 1 2 34 40 2 1 33 39 1 R GG EE CC AA Y W V U T S Q FF DD BB Z X OM16671 Figure 17. Component-side Connectors 62 Technical Reference Table 17 lists the component-side connectors identified in Figure 17. Table 17. Component-side Connectors Shown in Figure 17 Item/Callout from Figure 17 Description A PCI Conventional bus add-in card connector 4 B Rear chassis fan connector 2 C PCI Conventional bus add-in card connector 3 D PCI Express x1 bus add-in card connector 2 E ATAPI CD-ROM connector (optional) F PCI Express x1 bus add-in card connector 1 G S/PDIF connector (optional) H Front panel audio connector I PCI Conventional bus add-in card connector 2 J Front panel IEEE-1394a connector (optional) K PCI Conventional bus add-in card connector 1 L Front panel IEEE-1394a connector (optional) M PCI Express x16 bus add-in card connector N Rear chassis fan connector 1 O Alternate power connector P +12V power connector (ATX12V) Q SCSI LED (optional) R Serial port B (optional) S Processor fan connector T Power connector U Diskette drive connector V Parallel ATA IDE connector W Chassis intrusion connector X Front chassis fan connector Y Serial ATA connector 1 Z Serial ATA connector 3 AA Serial ATA connector 2 BB Serial ATA connector 0 CC Auxiliary front panel power LED connector DD Front panel connector EE ATX fan connector (optional) FF Front panel USB connector GG Front panel USB connector 63 Intel Desktop Board D915GEV/D915GRF Technical Product Specification Table 18. S/PDIF Connector (Optional) Pin Signal Name 1 +5 V 2 S/PDIF Output 3 Ground Table 19. ATAPI CD-ROM Connector (Optional) Pin Signal Name 1 Left audio input from CD-ROM 2 CD audio differential ground 3 CD audio differential ground 4 Right audio input from CD-ROM Table 20. 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. Table 21. Serial Port B Connector (optional) Pin Signal Name Pin Signal Name 1 DCD 2 RXD 3 TXD 4 DTR 5 Ground 6 DSR 7 RTS 8 CTS 9 RI 10 Not connected Table 22. Chassis Intrusion Connector Pin Signal Name 1 Intruder 2 Ground 64 Technical Reference Table 23. SCSI Hard Drive Activity LED Connector (Optional) Pin Signal Name 1 SCSI_ACT# 2 No connect Table 24. Serial ATA Connectors Pin Signal Name 1 Ground 2 TXP 3 TXN 4 Ground 5 RXN 6 RXP 7 Ground Table 25. Processor Fan Connector Pin Signal Name 1 Ground 2 +12 V 3 FAN_TACH 4 FAN_CONTROL 2.8.2.1 Chassis Fan Connectors The board has three standard and one optional chassis fan connectors:  Front chassis fan  Rear chassis fan 1  Rear chassis fan 2  ATX fan connector (optional) Table 26 lists the signal names for the chassis fan connectors. These signal names apply to all chassis fan connectors. Table 26. Chassis Fan Connectors Pin Signal Name 1 Control 2 +12 V 3 Tach 65 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 2.8.2.2 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.  Alternate power – a 1 x 4 connector. This connector provides additional power when using high wattage PCI Express x16 graphics cards. INTEGRATOR’S NOTE
When using high wattage PCI Express x16 graphics cards, use one of the following power supply configurations to avoid system instability:  The preferred method of power delivery is to use a power supply with a 2 x 12 main power cable. In this configuration, use two connectors to provide power to the board:  The main power connector  The ATX12V connector In this configuration, the alternate power connector is not required. The 2 x 12 main power cable can provide up to 144 W of power from the +12 V rail.  An alternate method of power delivery is to use a power supply has a 2 x 10 main power cable. In this configuration, use three connectors to provide power to the board:  The main power connector  The ATX12V connector  The alternate power connector Table 27. 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. 66 Technical Reference Table 28. ATX12V Power Connector Pin Signal Name Pin Signal Name 1 Ground 2 Ground 3 +12 V 4 +12 V Table 29. Alternate Power Connector Pin Signal Name 1 +12 V 2 Ground 3 Ground 4 +5 V 2.8.2.3 Add-in Card Connectors The board has the following add-in card connectors:  One PCI Express x16 connector supporting simultaneous transfer speeds up to 8 GBytes/sec.  Two PCI Express x1 connectors. The x1 interfaces support simultaneous transfer speeds up to 500 MBytes/sec.  Four PCI Conventional rev 2.2 compliant local bus slots. The SMBus is routed to PCI Conventional bus connector 2 only (ATX expansion slot 6). PCI Conventional bus add-in cards with SMBus support can access sensor data and other information residing on the Desktop Board. Note the following considerations for the PCI Conventional bus connectors:  All of the PCI Conventional bus connectors are bus master capable.  SMBus signals are routed to PCI Conventional bus connector 2. This enables PCI Conventional bus add-in boards with SMBus support to access sensor data on the boards. The specific SMBus signals are as follows:  The SMBus clock line is connected to pin A40.  The SMBus data line is connected to pin A41. NOTE The PCI Express x16 connector is configured to support only a PCI Express x1 link when the Intel GMA900 graphics controller is enabled. 67 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 2.8.2.4 Auxiliary Front Panel Power/Sleep LED Connector Pins 1 and 3 of this connector duplicate the signals on pins 2 and 4 of the front panel connector. Table 30. 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 2.8.2.5 Front Panel Connector This section describes the functions of the front panel connector. Table 31 lists the signal names of the front panel connector. Figure 18 is a connection diagram for the front panel connector. Table 31. 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 ) 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 N/C +5 V DC 9 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 18. Connection Diagram for Front Panel Connector 68 Green Red Yellow Purple Technical Reference 2.8.2.5.1 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 2.8.2.5.2 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. 2.8.2.5.3 Power/Sleep LED Connector [Green] Pins 2 and 4 [Green] can be connected to a one- or two-color LED. Table 32 shows the possible states for a one-color LED. Table 33 shows the possible states for a two-color LED. Table 32. States for a One-Color Power LED LED State Description Off Power off/sleeping Steady Green Running Table 33. States for a Two-Color Power LED LED State Description Off Power off Steady Green Running Steady Yellow Sleeping / NOTE The colors listed in Table 32 and Table 33 are suggested colors only. Actual LED colors are product- or customer-specific. 2.8.2.5.4 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. 2.8.2.6 Front Panel USB Connectors Figure 19 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. 69 Intel Desktop Board D915GEV/D915GRF Technical Product Specification  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 19. Connection Diagram for Front Panel USB Connectors 2.8.2.7 Front Panel IEEE 1394a Connectors (Optional) Figure 20 is a connection diagram for the optional IEEE 1394a connectors. TPA+ 1 2 TPA 3 4 Ground Ground 5 6 TPB+ TPB 7 8 +12 V DC +12 V DC 10 Key (no pin) Ground OM16107 Figure 20. Connection Diagram for IEEE 1394a Connectors INTEGRATOR’S NOTES
 The IEEE 1394a connectors are colored blue.  The +12 V DC power on the IEEE 1394a connectors is fused.  Each IEEE 1394a connector provides one IEEE 1394a port. 70 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 21 shows the location of the jumper block. The 3-pin jumper block determines the BIOS Setup program’s mode. Table 34 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 OM16672 Figure 21. Location of the Jumper Block Table 34. BIOS Setup Configuration Jumper Settings Function/Mode Jumper Setting Configuration Normal The BIOS uses current configuration information and 1 3 1-2 passwords for booting. Configure After the POST runs, Setup runs automatically. The 13 2-3 maintenance menu is displayed. Recovery The BIOS attempts to recover the BIOS configuration. A 13 None recovery diskette is required. 71 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 2.10 Mechanical Considerations 2.10.1 Form Factor The boards are designed to fit into an ATX-form-factor chassis. Figure 22 illustrates the mechanical form factor. Dimensions are given in inches [millimeters]. The outer dimensions are 12.00 inches by 9.60 inches [304.80 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 6.450 [78.74] [163.83] 6.200 5.550 0.00 2.600 [157.48] [140.97] [66.04] 4.900 [124.46] OM16674 Figure 22. Board Dimensions 72 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 23 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 OM17166 Figure 23. I/O Shield Dimensions 73 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 D915GEV/D915GRF Technical Product Specification 2.11 Electrical Considerations 2.11.1 DC Loading Table 35 lists the DC loading characteristics of the board. 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 35. 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 9.00 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 a fully loaded board (all six expansion slots and the PCI Express x16 slot filled) must not exceed 14 A. 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 36 lists the current capability of the fan connectors. Table 36. Fan Connector Current Capability Fan Connector Maximum Available Current Processor fan 1000 mA Front chassis fan 600 mA Rear chassis fan 600 mA Rear chassis fan 2 600 mA ATX fan (optional) 600 mA 74 Technical Reference 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 35 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) 75 Intel Desktop Board D915GEV/D915GRF 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 24) to maintain required airflow across the processor voltage regulator area. OM16996 Figure 24. Processor Heatsink 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. 76 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 25) can reach a temperature of up to 85 C in an open chassis. Figure 25 shows the locations of the localized high temperature zones. A B D C OM16673 Item Description A Processor voltage regulator area B Processor C Intel 82915G GMCH D Intel 82801FB ICH6 Figure 25. Localized High Temperature Zones 77 Intel Desktop Board D915GEV/D915GRF Technical Product Specification Table 37 provides maximum case temperatures for the Desktop Board D915GEV/D915GRF 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 Desktop Board D915GEV/D915GRF. Table 37. Thermal Considerations for Components Component Maximum Case Temperature Intel Pentium 4 processor For processor case temperature, see processor datasheets and processor specification updates o 99 C (under bias) Intel 82915G GMCH o Intel 82801FB ICH6 110 C (under bias) For information about Refer to Intel Pentium 4 processor datasheets and specification updates Section 1.3, page 17 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 D915GEV and D915GRF boards is 110,262 hours. 78 Technical Reference 2.14 Environmental Table 38 lists the environmental specifications for the board. Table 38. 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 79 Intel Desktop Board D915GEV/D915GRF 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 39 lists the safety regulations the Desktop Boards D915GEV and D915GRF comply with when correctly installed in a compatible host system. Table 39. 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 40 lists the EMC regulations the Desktop Boards D915GEV and D915GRF comply with when correctly installed in a compatible host system. Table 40. 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 3548 (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) 80 Technical Reference 2.15.2.1 FCC Compliance Statement (USA) Product Type: D915GEV Desktop Board and D91GRF Desktop Board This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:  Reorient or relocate the receiving antenna.  Increase the separation between the equipment and the receiver.  Connect the equipment to a different electrical branch circuit from that to which the receiver is connected.  Consult the dealer or an experienced radio/TV technician for help. Any changes or modifications to the equipment not expressly approved by Intel Corporation could void the user’s authority to operate the equipment. 2.15.2.2 Canadian Compliance Statement This Class B digital apparatus complies with Canadian ICES-003. Cet appereil numérique de la classe B est conforme à la norme NMB-003 du Canada. 2.15.3 European Union Declaration of Conformity Statement ® We, Intel Corporation, declare under our sole responsibility that the product: Intel Desktop Boards D915GEV and D915GRF are in conformity with all applicable essential requirements necessary for CE marking, following the provisions of the European Council Directive 89/336/EEC (EMC Directive) and Council Directive 73/23/EEC (Safety/Low Voltage Directive). The product is properly CE marked demonstrating this conformity and is for distribution within all member states of the EU with no restrictions. This product follows the provisions of the European Directives 89/336/EEC and 73/23/EEC. Dansk Dette produkt er i overensstemmelse med det europæiske direktiv 89/336/EEC & 73/23/EEC. Dutch Dit product is in navolging van de bepalingen van Europees Directief 89/336/EEC & 73/23/EEC. 81 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 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. 82 Technical Reference 2.15.5 Product Certification Markings (Board Level) Table 41 lists the board’s product certification markings. Table 41. 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 D915GEV or D915GRF 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). 83 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 84 3 Overview of BIOS Features What This Chapter Contains 3.1 Introduction ................................................................................................................85 3.2 BIOS Flash Memory Organization..............................................................................86 3.3 Resource Configuration..............................................................................................86 3.4 System Management BIOS (SMBIOS).......................................................................87 3.5 Legacy USB Support..................................................................................................87 3.6 BIOS Updates ............................................................................................................88 3.7 Boot Options ..............................................................................................................89 ® 3.8 Fast Booting Systems with Intel Rapid BIOS Boot....................................................90 3.9 BIOS Security Features..............................................................................................91 3.1 Introduction The boards use an Intel/AMI BIOS that is stored in the Firmware Hub (FWH) and can be updated using a disk-based program. The FWH contains the BIOS Setup program, POST, the PCI auto- configuration utility, and Plug and Play support. The BIOS displays a message during POST identifying the type of BIOS and a revision code. The initial production BIOSs are identified as EV91510A.86A. When the BIOS Setup configuration jumper is set to configure mode and the computer is powered- up, the BIOS compares the CPU version and the microcode version in the BIOS and reports if the two match. The BIOS Setup program can be used to view and change the BIOS settings for the computer. The BIOS Setup program is accessed by pressing the 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 71 shows how to put the Desktop Board in configure mode. 85 Intel Desktop Board D915GEV/D915GRF Technical Product Specification Table 42 lists the BIOS Setup program menu features. Table 42. 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 43 lists the function keys available for menu screens. Table 43. 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 86 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. 87 Intel Desktop Board D915GEV/D915GRF 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 1.3, page 17 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. Refer to For information about The Intel World Wide Web site Section 1.3, page 17 88 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 44 lists the boot device menu options. Table 44. 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 89 Intel Desktop Board D915GEV/D915GRF 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). 90 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 45 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 45. 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. 91 Intel Desktop Board D915GEV/D915GRF Technical Product Specification 92 4 Error Messages and Beep Codes What This Chapter Contains 4.1 BIOS Error Messages ................................................................................................93 4.2 Port 80h POST Codes................................................................................................95 4.3 Bus Initialization Checkpoints.....................................................................................99 4.4 Speaker....................................................................................................................100 4.5 BIOS Beep Codes ....................................................................................................100 4.1 BIOS Error Messages Table 46 lists the error messages and provides a brief description of each. Table 46. 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 93 Intel Desktop Board D915GEV/D915GRF Technical Product Specification Table 46. 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. 94 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 47 defines the uncompressed INIT code checkpoints, Table 48 describes the boot block recovery code checkpoints, and Table 49 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 47. 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 48. 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). 95 Intel Desktop Board D915GEV/D915GRF Technical Product Specification Table 49. 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 96 Error Messages and Beep Codes Table 49. 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 97 Intel Desktop Board D915GEV/D915GRF Technical Product Specification Table 49. 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 98 Error Messages and Beep Codes Table 49. 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 50 describes the bus initialization checkpoints. Table 50. 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 51 describes the upper nibble of the high byte and indicates the function that is being executed. Table 51. 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. 99 Intel Desktop Board D915GEV/D915GRF Technical Product Specification Table 52 describes the lower nibble of the high byte and indicates the bus on which the routines are being executed. Table 52. 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  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, page 14 4.5 BIOS Beep Codes Whenever a recoverable error occurs during POST, the BIOS displays an error message describing the problem (see Table 53). 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 53. Beep Codes Beep Description 1 CPU error 3 Memory error 6 System failure 7 System failure 8 Video error 100