Intel® Desktop Board D845GEBV2/D845GERG2 Technical Product Specification October 2002 Order Number: C14584-001 The Intel® Desktop Board D845GEBV2/D845GERG2 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 D845GEBV2/D845GERG2 Specification Update.
Revision History Revision -001 Revision History Date Intel® First release of the Desktop Board D845GEBV2/D845GERG2 Technical Product Specification. October 2002 This product specification applies to only standard Intel® Desktop Boards D845GEBV2 and D845GERG2 with BIOS identifier RG84510A.86A. Changes to this specification will be published in the Intel Desktop Board D845GEBV2/D845GERG2 Specification Update before being incorporated into a revision of this document.
Preface This Technical Product Specification (TPS) specifies the board layout, components, connectors, power and environmental requirements, and the BIOS for these Intel® Desktop Boards: D845GEBV2 and D845GERG2. It describes the standard product and available manufacturing options.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification CAUTION Cautions are included to help you avoid damaging hardware or losing data. WARNING Warnings indicate conditions, which if not observed, can cause personal injury.
Contents 1 Product Description 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 Board Differences.......................................................................................................11 Overview ....................................................................................................................12 1.2.1 Feature Summary ........................................................................................12 1.2.2 Manufacturing Options .....................
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 DMA Channels ...........................................................................................................55 PCI Configuration Space Map ....................................................................................55 Interrupts ....................................................................................................................
Contents Fast Booting Systems with Intel® Rapid BIOS Boot ....................................................93 3.9.1 Peripheral Selection and Configuration ........................................................93 3.9.2 Intel Rapid BIOS Boot ..................................................................................93 3.10 BIOS Security Features..............................................................................................94 3.9 4 BIOS Setup Program 4.1 4.2 4.3 4.4 4.5 4.6 4.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Figures 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. Desktop Board D845GEBV2 Components .................................................................14 Desktop Board D845GERG2 Components.................................................................15 Desktop Board D845GERG2 Components (with Gigabit Ethernet LAN option) ..........16 Block Diagram .............................................
Contents 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64. Fan Connector Function/Operation for Desktop Boards with a Hardware Monitoring and Fan Control ASIC ...............................................................................49 System Memory Map..................................................................................................53 I/O Map .....
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 65. 66. 67. 68. 69. 70. 71. 72. 73. 74. 75. 76. 77. 78. 79. 80. 81. 82. 83. x Chipset Configuration Submenu ...............................................................................110 Fan Control Configuration Submenu ........................................................................112 Security Menu ..........................................................................................................113 Power Menu .
1 Product Description What This Chapter Contains 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 1.10 1.11 1.12 1.13 1.14 Board Differences.......................................................................................................11 Overview ....................................................................................................................12 Online Support ...........................................................................................................
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.2 Overview 1.2.1 Feature Summary Table 2 summarizes the major features of the Desktop Boards D845GEBV2 and D845GERG2. Table 2. Feature Summary Form Factor D845GEBV2: ATX (12.00 inches by 8.20 inches) D845GERG2: microATX (9.60 inches by 8.
Product Description Table 2. Feature Summary (continued) • Intel/AMI BIOS (resident in the 4 Mbit FWH) BIOS • Support for Advanced Configuration and Power Interface (ACPI), Plug and Play, and SMBIOS • Support for PCI Local Bus Specification Revision 2.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.2.3 Board Layouts Figure 1 shows the location of the major components on the Desktop Board D845GEBV2.
Product Description Figure 2 shows the location of the major components on the Desktop Board D845GERG2.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Figure 3 shows the location of the major components on the Desktop Board D845GERG2 that includes the Gigabit Ethernet LAN option.
Product Description 1.2.4 Block Diagrams Figure 4 is a block diagram of the major functional areas of the Desktop Boards D845GEBV2 and D845GERG2. See Figure 7 on page 33 for USB port routing. Back Panel/ Front Panel USB Ports = connector or socket USB Serial Ports Primary/ Secondary IDE mPGA478 Processor Socket Parallel Port LPC Bus I/O Controller UDMA 33 and ATA-66/100 PS/2 Mouse PS/2 Keyboard Diskette Drive Connector System Bus (400/533 MHz) LPC Bus AGP Interface 4X AGP Connector (1.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Figure 5 is a block diagram of the major functional areas of the Desktop Board D845GEBV2 with the Gigabit Ethernet LAN option. See Figure 7 on page 33 for USB port routing.
Product Description 1.3 Online Support To find information about… Visit this World Wide Web site: Intel Desktop Boards D845GEBV2 and D845GERG2 under “Desktop Board Products” or “Desktop Board Support” http://www.intel.com/design/motherbd Available configurations for the Desktop Board D845GEBV2 http://developer.intel.com/design/motherbd/bv2/bv2_available.htm Available configurations for the Desktop Board D845GERG2 http://developer.intel.com/design/motherbd/rg2/rg2_available.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.5 Design Specifications Table 4 lists the specifications applicable to the Desktop Boards D845GEBV2 and D845GERG2. Table 4. Specifications Reference Name Specification Title Version, Revision Date, and Ownership The information is available from… AC ’97 Audio Codec ’97 Revision 2.2, September 2000, Intel Corporation. ftp://download.intel.com/ial/ scalableplatforms/ ac97r22.
Product Description Table 4. Specifications (continued) Reference Name Specification Title Version, Revision Date and Ownership The information is available from… DDR SDRAM Double Data Rate (DDR) SDRAM Specification Version 1.0, June 2000, JEDEC Solid State Technology Association. http://www.jedec.org/ Design Specification for a 184 Pin DDR Unbuffered DIMM Revision 1.0, October 2001, JEDEC Solid State Technology Association. http://www.jedec.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 4. 22 Specifications (continued) Reference Name Specification Title Version, Revision Date and Ownership The information is available from… PXE Preboot Execution Environment Version 2.1, September 20, 1999, Intel Corporation. ftp://download.intel.com/ial/ wfm/pxespec.pdf SFX SFX/SFX12V Power Supply Design Guide Version 2.0, May 2001, Intel Corporation. http://www.formfactors.org/ developer/specs/sfx/ sfx12v.
Product Description 1.6 Processor ✏ NOTE Refer to Thermal Considerations (Section 2.12, page 81) for important information when using an Intel Pentium 4 processor operating above 2.80 GHz with this Intel desktop board. CAUTION Use only the processors listed below. Use of unsupported processors can damage the board, the processor, and the power supply. See Intel’s World Wide Web site for the most up-to-date list of supported processors for these boards. The board provides an mPGA478 processor socket.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.7 System Memory The Desktop Boards D845GEBV2 and D845GERG2 both have two DIMM sockets and support the following memory features: • • • • • • 2.
Product Description Table 6 lists the supported DDR DIMM configurations. Table 6.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.8 Intel® 845GE Chipset The Intel 845GE chipset consists of the following devices: • • • Intel 82845GE Graphics and Memory Controller Hub (GMCH) with Accelerated Hub Architecture (AHA) bus Intel 82801DB I/O Controller Hub (ICH4) with AHA bus Firmware Hub (FWH) The GMCH is a centralized controller for the system bus, the memory bus, the AGP bus, and the Accelerated Hub Architecture interface.
Product Description 1.8.1 Intel 845GE Graphics Subsystem The Intel 845GE chipset contains two separate, mutually exclusive graphics options. Either the Intel Extreme Graphics controller (contained within the 82845GE GMCH) is used, or an AGP add-in card can be used. When an AGP add-in card is installed, the Intel Extreme Graphics controller is disabled. Intel® Extreme Graphics Controller 1.8.1.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 8 lists the Direct Draw supported modes. Table 8.
Product Description Table 9 lists the video BIOS video modes supported by the graphics subsystem. Table 9.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 10 lists the supported configuration modes of the graphics subsystem. Table 10.
Product Description Table 11 describes the bpp configuration mode values referenced in Table 10. In Table 11, assume that for each configuration mode number, the features of all lower numbers are also supported. For example, if the supported configuration mode is 4, then modes 1 through 3 are also supported. DVD consists of both the overlay engine as well as the MPEG decoding; both are necessary for DVD playback. Table 11.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification • • • Increased headroom for larger resolution and color depth Reduced power as a result of decreased memory bandwidth Reduction in depth and color bandwidth associated with conventional rendering For information about Refer to Obtaining the Zone Rendering white paper http://developer.intel.com/design/chipsets/845g/ 1.8.1.4 AGP Connector The AGP connector supports either: • • # 1x, 2x, or 4x AGP add-in cards with 1.
Product Description 1.8.2 USB The Desktop Boards support up to six USB 2.0 ports and fully support UHCI and EHCI and use UHCI- and EHCI-compatible drivers. For more than six USB devices, an external hub can be connected to any of the ports. The ICH4 provides the USB controller for all ports, as shown in Figure 7.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.8.3 1.8.3.1 IDE Support IDE Interfaces The ICH4’s IDE controller has two independent bus-mastering IDE interfaces that can be independently enabled. The IDE interfaces support 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.
Product Description 1.8.4 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.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.9.3 Diskette Drive Controller The I/O controller supports one diskette drive. Use the BIOS Setup program to configure the diskette drive interface. For information about Refer to The location of the diskette drive connector on the D845GERG2 board Figure 15, page 67 The location of the diskette drive connector on the D845GEBV2 board Figure 16, page 68 The supported diskette drive capacities and sizes Table 61, page 106 1.9.
Product Description 1.10 Audio Subsystem The audio subsystem consists of the following devices: • • Intel 82801DB I/O Controller Hub (ICH4) Analog Devices AD1981B audio codec The audio subsystem includes these features: • • • Split digital/analog architecture for improved S/N (signal-to-noise) ratio: ≥ 85 dB Power management support for ACPI 2.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.10.1 1.10.1.1 Audio Connectors Front Panel Audio Connector A 2 x 5-pin connector provides mic in and line out signals for front panel audio connectors. ✏ For information about Refer to The location of the connector Figure 13, page 62 The signal names of the front panel audio connector Table 25, page 64 Obtaining the Front Panel I/O Connectivity Design Guide Section 1.
Product Description 1.11 LAN Subsystem (Optional) The Network Interface Controller subsystem consists of the ICH4 (with integrated LAN Media Access Controller) and a physical layer interface device.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 12. 10/100 Ethernet LAN Connector LED States LED Color LED State Condition Green Off 10 Mbit/sec data rate is selected. On 100 Mbit/sec data rate is selected. Yellow Off LAN link is not established. On (steady state) LAN link is established. On (brighter and pulsing) The computer is communicating with another computer on the LAN.
Product Description The interfaces supported by the CNR include the following: • • • AC ’97 interface: supports audio and/or modem functions on the CNR card. LAN interfaces: an eight-pin interface for use with Platform LAN Connection (PLC) based devices. SMBus interface: provides Plug-and-Play functionality for the CNR card. The CNR connector includes power signals required for power management and for CNR card operation. To learn more about the CNR, refer to the CNR specification.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.13 Hardware Management Subsystem The hardware management features enable the Desktop Boards to be compatible with the Wired for Management (WfM) specification.
Product Description For information about Refer to The location of the fan connectors and sensors for thermal monitoring Figure 10, page 43 1.13.1.3 Thermal Monitoring Figure 10 shows the location of the sensors and fan connectors.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.13.2 Fan Monitoring Fan monitoring can be implemented using Intel® Active Monitor, Intel® LANDesk® Client Manager, 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 1.14.2.2, page 48 1.13.
Product Description 1.14.1 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 the Desktop Boards D845GEBV2 and D845GERG2 requires an operating system that provides full ACPI support.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.14.1.1 System States and Power States Under ACPI, the operating system directs all system and device power state transitions. The operating system puts devices in and out of low-power states based on user preferences and knowledge of how devices are being used by applications. Devices that are not being used can be turned off.
Product Description 1.14.1.2 Wake-up Devices and Events Table 16 lists the devices or specific events that can wake the computer from specific states. Table 16.
Intel Desktop Board D845GEBV2/D845GERG2 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. 1.14.2.
Product Description Table 18. Fan Connector Function/Operation for Desktop Boards with a Hardware Monitoring and Fan Control ASIC Connector Description Processor fan • +12 V DC connection for a processor fan or active fan heatsink. • Fan is on in the S0 or S1 state. Fan is off when the system is off or in the S3, S4, or S5 state. • Wired to a fan tachometer input of the hardware monitoring and fan control ASIC.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.14.2.4 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. Refer to Section 2.11.3 on page 79 for additional information.
Product Description 1.14.2.5 +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 11 shows the location of the standby power indicator LED on the D845GEBV2 board. 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.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 1.14.2.7 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. 1.14.2.8 Wake from PS/2 Devices PS/2 device activity wakes the computer from an ACPI S1 or S3 state. 1.14.2.
2 Technical Reference What This Chapter Contains 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 2.10 2.11 2.12 2.13 2.14 2.15 Introduction.................................................................................................................53 Memory Map ..............................................................................................................53 Fixed I/O Map.............................................................................................................54 DMA Channels ......
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 2.3 Fixed I/O Map Table 20. I/O Map Address (hex) Size Description 0000 - 00FF 256 bytes 0170 - 0177 01F0 - 01F7 8 bytes 8 bytes Used by the Desktop Board D845GEBV2/D845GERG2. Refer to the ICH4 data sheet for dynamic addressing information.
Technical Reference 2.4 DMA Channels Table 21. 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 2.5 PCI Configuration Space Map Table 22.
Intel Desktop Board D845GEBV2/D845GERG2 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 ICH4 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 23.
Technical Reference 2.7 PCI Interrupt Routing Map This section describes interrupt sharing and how the interrupt signals are connected between the PCI bus connectors and onboard PCI devices. The PCI specification specifies how interrupts can be shared between devices attached to the PCI bus. In most cases, the small amount of latency added by interrupt sharing does not affect the operation or throughput of the devices.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 24. PCI Interrupt Routing Map ICH4 PIRQ Signal Name PCI Interrupt Source PIRQA PIRQB AGP connector INTA INTB PIRQC PIRQD PIRQE PIRQF PIRQG PIRQH ICH4 USB UHCI controller 1 INTA SMBus controller INTB ICH4 USB UHCI controller 2 INTB AC ’97 ICH4 Audio/Modem INTB ICH4 LAN INTA ICH4 USB UHCI controller 3 INTC INTD ICH4 USB 2.
Technical Reference 2.8 Connectors CAUTION Only the back panel USB, front panel USB, VGA, and PS/2 connectors of the Desktop Boards D845GEBV2 and D845GERG2 have overcurrent protection. The Desktop Boards’ 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.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 2.8.1 Back Panel Connectors Figure 12 shows the location of the back panel connectors. The back panel connectors are color-coded in compliance with PC 99 recommendations. The figure legend below lists the colors used.
Technical Reference ✏ 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. 2.8.2 Internal I/O Connectors The internal I/O connectors are divided into the following functional groups: • • 2.8.2.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 2.8.2.2 Audio, Power, and Hardware Control Connectors Figure 13 shows the location of the audio, power, and hardware control connectors.
Technical Reference Figure 14 shows the location of the audio, power, and hardware control connectors on the Desktop Board D845GERG2 with the Gigabit Ethernet LAN option.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 25. # Front Panel Audio Connector Pin Signal Name Pin Signal Name 1 MIC_IN 2 Ground 3 MIC_BIAS 4 +5 V 5 RIGHT_OUT 6 RIGHT_IN 7 Ground 8 Key 9 LEFT_OUT 10 LEFT_IN INTEGRATOR’S NOTE The front panel audio connector is alternately used as a jumper block for routing audio signals. Refer to Section 2.9.1 on page 72 for more information. Table 26.
Technical Reference # INTEGRATOR’S NOTES • Use only ATX12V-compliant power supplies with these boards. ATX12V power supplies have an additional power lead that provides required supplemental power for the processor. Always connect the 20-pin and 4-pin leads of ATX12V power supplies to the corresponding connectors on the board, otherwise the board will not boot. • Do not use a standard ATX power supply. The board will not boot with a standard ATX power supply. Table 29.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 31. Pin Signal Name Pin Signal Name 1 +3.3 V 11 +3.3 V 2 +3.3 V 12 -12 V 3 Ground 13 Ground 4 +5 V 14 PS-ON# (power supply remote on/off) 5 Ground 15 Ground 6 +5 V 16 Ground 7 Ground 17 Ground 8 PWRGD (Power Good) 18 No connect 9 +5 V (Standby) 19 +5 V 10 +12 V 20 +5 V Table 32. Chassis Intrusion Connector Pin Signal Name 1 Intruder 2 Ground Table 33.
Technical Reference 2.8.2.3 Add-in Board and Peripheral Interface Connectors Figure 15 shows the location of the add-in board connector and peripheral connectors for the Desktop Board D845GEBV2. Note the following considerations for the PCI bus connectors (for both Desktop Boards): • • All of the PCI bus connectors are bus master capable. SMBus signals are routed to PCI bus connector 2. This enables PCI bus add-in boards with SMBus support to access sensor data on the Desktop Board.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification A B C D E 2 1 2 1 I H 40 39 40 2 39 1 G 34 33 F OM15022 Item Description Item Description A B C D E CNR (optional) PCI bus connector 3 PCI bus connector 2 PCI bus connector 1 AGP connector F G H I Diskette drive Primary IDE Secondary IDE SCSI LED Figure 16. D845GERG2 Add-in Board and Peripheral Interface Connectors # INTEGRATOR’S NOTES • The AGP connector is keyed for 1.5 V AGP cards only.
Technical Reference 2.8.3 External I/O Connectors Figure 17 shows the locations of the external I/O connectors. 2 1 C 7 10 1 2 B 8 9 A 3 1 OM13580 Item Description For more information see: A B C Auxiliary front panel power/sleep/message-waiting LED Front panel Front panel USB Table 39 Table 36 Table 35 Figure 17. External I/O Connectors Table 35.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 2.8.3.1 Front Panel Connector This section describes the functions of the front panel connector. Table 36 lists the signal names of the front panel connector. Table 36.
Technical Reference 2.8.3.1.3 Power/Sleep/Message Waiting LED Connector Pins 2 and 4 can be connected to a one- or two-color LED. Table 37 shows the possible states for a one-color LED. Table 38 shows the possible states for a two-color LED. Table 37. States for a One-Color Power LED LED State Description Off Power off/sleeping Steady Green Running Blinking Green Running/message waiting Table 38.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 2.9 Jumper Blocks CAUTION Do not move any jumpers with the power on. Always turn off the power and unplug the power cord from the computer before changing a jumper setting. Otherwise, the Desktop Board could be damaged. Figure 18 shows the location of the jumper blocks.
Technical Reference Table 40 describes the two configurations of this connector/jumper block. CAUTION Do not place jumpers on this block in any configuration other than the one described in Table 40. Other jumper configurations are not supported and could damage the Desktop Board. Table 40. Front Panel Audio Connector/Jumper Block Jumper Setting 1 2 3 4 5 6 1 and 2 3 and 4 5 and 6 10 9 and 10 Configuration Audio line out signals are routed to the back panel audio line out connector.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 2.10 Mechanical Considerations 2.10.1 D845GEBV2 Form Factor The Desktop Board D845GEBV2 is designed to fit into an ATX-form-factor chassis. Figure 19 illustrates the mechanical form factor for the Desktop Board D845GEBV2. Dimensions are given in inches [millimeters]. The outer dimensions are 12.00 inches by 8.20 inches [304.80 millimeters by 208.28 millimeters].
Technical Reference 2.10.2 D845GERG2 Form Factor The Desktop Board D845GERG2 is designed to fit into either a microATX or an ATX-form-factor chassis. Figure 20 illustrates the mechanical form factor for the Desktop Board D845GERG2. Dimensions are given in inches [millimeters]. The outer dimensions are 9.60 inches by 8.20 inches [243.84 millimeters by 208.28 millimeters]. Location of the I/O connectors and mounting holes are in compliance with the ATX specification (see Section 1.5).
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 2.10.3 I/O Shield The back panel I/O shield for the Desktop Boards D845GEBV2 and D845GERG2 must meet specific dimension and material requirements. Systems based on these Desktop Boards need the back panel I/O shield to pass certification testing. Figure 21 shows the I/O shield for Desktop Boards with the onboard LAN subsystem. Figure 22 shows the I/O shield for Desktop Boards without the onboard LAN subsystem.
Technical Reference 6.390 REF [162.300] 0.787 0.010 TYP [20 0.063 0.005 [1.600 0.120] 0.254] 3x Dia 0.039 [1.000] 3x Dia 0.330 [8.380] 8X R0.5 MIN 0.884 [22.450] A 0.519 [13.190] 0.276 [7.012] 0.000 [0.000] 0.027 [0.690] 0.465 [11.810] 0.472 [12.000] 5.771 [146.577] 4.840 [122.950] 3.219 [81.768] 2.081 [52.854] 1.807 [45.892] 1.195 [30.360] 0.447 [11.345] 0.000 [0.000] 0.465 [11.811] 0.567 [14.400] Pictorial View OM15024 Figure 22.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 2.11 Electrical Considerations 2.11.1 Power Consumption Table 42 lists voltage and current measurements for a computer that contains the Desktop Board D845GEBV2/D845GERG2 and the following: • • • • • • 2.80 GHz Intel Pentium 4 processor with a 512 KB cache 64 MB AGP add-in card 256 MB DDR 333 SDRAM 3.5-inch diskette drive 10 GB IDE hard disk drive 6.
Technical Reference 2.11.3 Standby Current Requirements CAUTION If the standby current necessary to support multiple wake events from the PCI and/or USB buses exceeds power supply capacity, the Desktop Boards D845GEBV2 and D845GERG2 may lose register settings stored in memory, etc. Calculate the standby current requirements using the steps described below.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification ✏ NOTE IBM PS/2 Port Specification (Sept 1991) states: • 275 mA for keyboard • 70 mA for the mouse (nonwake-enable device) PCI/AGP requirements are calculated by totaling the following: • One wake-enabled device @ 375 mA, plus • Five nonwake-enabled devices @ 20 mA each, plus USB requirements are calculated as: • One wake-enabled device @ 500 mA • USB hub @ 100 mA • Three USB nonwake-enabled devices connected @ 2.
Technical Reference 2.11.5 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. Refer to Section 2.11.3 on page 78 for additional information.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification CAUTION Ensure that the ambient temperature does not exceed the Desktop 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. CAUTION Ensure that proper airflow is maintained in the processor voltage regulator circuit.
Technical Reference Table 45 provides maximum case temperatures for the Desktop Board D845GEBV2/D845GERG2 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 D845GEBV2/D845GERG2. Table 45.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 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.
Technical Reference 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 47 lists the safety regulations the Desktop Boards D845GEBV2 and D845GERG2 comply with when correctly installed in a compatible host system. Table 47. Safety Regulations Regulation Title CSA C22.2 No.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 2.15.3 Product Certification Markings (Board Level) The Desktop Boards D845GEBV2 and D845GERG2 have the following product certification markings: • • • • • • • UL joint US/Canada Recognized Component mark: Consists of lower case c followed by a stylized backward UR and followed by a small US. Includes adjacent UL file number for Intel Desktop Boards: E210882 (component side).
3 Overview of BIOS Features What This Chapter Contains 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 Introduction.................................................................................................................87 BIOS Flash Memory Organization ..............................................................................87 Resource Configuration ..............................................................................................88 System Management BIOS (SMBIOS) .......................
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 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.
Overview of BIOS Features 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.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 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. ✏ NOTE Legacy USB support is for keyboards, mice, and hubs only. Other USB devices are not supported in legacy mode. 3.
Overview of BIOS Features 3.6.2 Custom Splash Screen During POST, an Intel splash screen is displayed by default. This splash screen can be replaced with a custom splash screen. A utility is available from Intel to assist with creating a custom splash screen. The custom splash screen can be programmed into the flash memory using the BIOS upgrade utility. Information about this capability is available on the Intel Support World Wide Web site.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 3.8 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. 3.8.1 CD-ROM Boot Booting from CD-ROM is supported in compliance to the El Torito bootable CD-ROM format specification.
Overview of BIOS Features 3.9 Fast Booting Systems with Intel® Rapid BIOS Boot These factors affect system boot speed: • • 3.9.1 Selecting and configuring peripherals properly Using an optimized BIOS, such as the Intel Rapid® BIOS Peripheral Selection and Configuration The following techniques help improve system boot speed: • • • • 3.9.2 Choose a hard drive with parameters such as “power-up to data ready” less than eight seconds, that minimize hard drive startup delays.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 3.10 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.
4 BIOS Setup Program What This Chapter Contains 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 Introduction.................................................................................................................95 Maintenance Menu .....................................................................................................96 Main Menu..................................................................................................................97 Advanced Menu...........................................
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 52 lists the function keys available for menu screens. Table 52.
BIOS Setup Program 4.3 Main Menu To access this menu, select Main on the menu bar at the top of the screen. Maintenance Main Advanced Security Power Boot Exit Table 54 describes the Main menu. This menu reports processor and memory information and is for configuring the system date and system time. Table 54. Main Menu Feature Options Description BIOS Version No options Displays the version of the BIOS. Processor Type No options Displays processor type.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 4.4 Advanced Menu To access this menu, select Advanced on the menu bar at the top of the screen. Maintenance Main Advanced Security Power Boot Exit PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration Fan Control Configuration Table 55 describes the Advanced Menu.
BIOS Setup Program 4.4.1 PCI Configuration Submenu To access this submenu, select Advanced on the menu bar and then PCI Configuration. Maintenance Main Advanced Security Power Boot Exit PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration Fan Control Configuration The submenu shown in Table 56 is used to configure the IRQ priority of PCI slots individually.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 56. PCI Configuration Submenu (continued) Feature Options Description PCI Slot5 IRQ Priority • Auto (default) Allows selection of IRQ priority for PCI bus connector 5. (Note 1, Note 2) • 5 • 9 • 10 • 11 PCI Slot6 IRQ Priority • Auto (default) (Note 1, Note 2) • 5 Allows selection of IRQ priority for PCI bus connector 6. • 9 • 10 • 11 Notes 1.
BIOS Setup Program 4.4.3 Peripheral Configuration Submenu To access this submenu, select Advanced on the menu bar and then Peripheral Configuration. Maintenance Main Advanced Security Power Boot Exit PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration Fan Control Configuration The submenu represented in Table 58 is used for configuring computer peripherals.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 58. Peripheral Configuration Submenu (continued) Feature Options Description Base I/O address (This feature is present only when Parallel Port is set to Enabled) • 378 (default) Specifies the base I/O address for the parallel port.
BIOS Setup Program 4.4.4 IDE Configuration Submenu To access this submenu, select Advanced on the menu bar and then IDE Configuration. Maintenance Main Advanced Security Power Boot Exit PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration Fan Control Configuration The menu represented in Table 59 is used to configure IDE device options. Table 59.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 4.4.4.1 Primary/Secondary IDE Master/Slave Submenus To access these submenus, select Advanced on the menu bar, then IDE Configuration, and then the master or slave to be configured.
BIOS Setup Program Table 60. Primary/Secondary IDE Master/Slave Submenus (continued) Feature Options Description DMA Mode • Auto (default) Specifies the DMA mode for the drive. • SWDMA0 Auto = Auto-detected • SWDMA1 SWDMAn = Single Word DMAn • SWDMA2 SWDMAn = Multi Word DMAn • MWDMA0 UDMAn = Ultra DMAn • MWDMA1 • MWDMA2 (This item is read-only unless Type is set to User.) • UDMA0 • UDMA1 • UDMA2 • UDMA3 • UDMA4 • UDMA5 S.M.A.R.T.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 4.4.5 Diskette Configuration Submenu To access this menu, select Advanced on the menu bar and then Diskette Configuration.
BIOS Setup Program 4.4.6 Event Log Configuration Submenu To access this menu, select Advanced on the menu bar and then Event Log Configuration. Maintenance Main Advanced Security Power Boot Exit PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration Fan Control Configuration The submenu represented by Table 62 is used to configure the event logging features.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 4.4.7 Video Configuration Submenu To access this menu, select Advanced on the menu bar and then Video Configuration.
BIOS Setup Program 4.4.8 USB Configuration Submenu To access this menu, select Advanced on the menu bar and then USB Configuration. Maintenance Main Advanced Security Power Boot Exit PCI Configuration Boot Configuration Peripheral Configuration IDE Configuration Diskette Configuration Event Log Configuration Video Configuration USB Configuration Chipset Configuration Fan Control Configuration The submenu represented in Table 64 is for configuring the USB features. Table 64.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 4.4.9 Chipset Configuration Submenu To access this menu, select Advanced on the menu bar and then Chipset Configuration.
BIOS Setup Program Table 65. Primary/Secondary IDE Master/Slave Submenus (continued) Feature Options Description SDRAM RAS# Active to Precharge • 8 Corresponds to tRAS. • 7 • 6 (default) • 5 SDRAM CAS# Latency • 2.0 (default) • 2.5 SDRAM RAS# to CAS# Delay • 4 • 3 (default) Selects the number of clock cycles required to address a column in memory. Selects the number of clock cycles between addressing a row and addressing a column.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 4.4.10 Fan Control Configuration Submenu To access this menu, select Advanced on the menu bar and then Fan Control Configuration.
BIOS Setup Program 4.5 Security Menu To access this menu, select Security from the menu bar at the top of the screen. Maintenance Main Advanced Security Power Boot Exit The menu represented by Table 67 is for setting passwords and security features. Table 67. Security Menu If no password entered previously: Feature Options Description Supervisor Password No options Reports if there is a supervisor password set. User Password No options Reports if there is a user password set.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 4.6 Power Menu To access this menu, select Power from the menu bar at the top of the screen. Maintenance Main Advanced Security Power Boot Exit ACPI The menu represented in Table 68 is for setting the power management features. Table 68. Power Menu Feature Options Description ACPI Select to display submenu Sets the ACPI power management options.
BIOS Setup Program 4.7 Boot Menu To access this menu, select Boot from the menu bar at the top of the screen. Maintenance Main Advanced Security Power Boot Exit Boot Device Priority Hard Disk Drives Removable Devices ATAPI CD-ROM Drives The menu represented in Table 70 is used to set the boot features and the boot sequence. Table 70. Boot Menu Feature Options Description Silent Boot • Disabled Disabled displays normal POST messages.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 4.7.1 Boot Device Priority Submenu To access this menu, select Boot on the menu bar and then Boot Devices Priority. Maintenance Main Advanced Security Power Boot Exit Boot Device Priority Hard Disk Drives Removable Devices ATAPI CD-ROM Drives The submenu represented in Table 71 is for setting boot devices priority. Table 71. Boot Device Priority Submenu Feature Options Description st • Removable Dev.
BIOS Setup Program 4.7.2 Hard Disk Drives Submenu To access this menu, select Boot on the menu bar and then Hard Disk Drives. Maintenance Main Advanced Security Power Boot Exit Boot Device Priority Hard Disk Drives Removable Devices ATAPI CD-ROM Drives The submenu represented in Table 72 is for setting hard disk drive priority. Table 72. Hard Disk Drives Submenu Feature st 1 Hard Disk Drive (Note) Note: 4.7.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 4.7.4 ATAPI CD-ROM Drives Submenu To access this menu, select Boot on the menu bar and then ATAPI CD-ROM Drives. Maintenance Main Advanced Security Power Boot Exit Boot Device Priority Hard Disk Drives Removable Devices ATAPI CD-ROM Drives The submenu represented in Table 74 is for setting ATAPI CD-ROM drive priority. Table 74.
5 Error Messages and Beep Codes What This Chapter Contains 5.1 5.2 5.3 5.4 5.5 BIOS Error Messages...............................................................................................119 Port 80h POST Codes..............................................................................................121 Bus Initialization Checkpoints ...................................................................................125 Speaker .......................................................................
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 76. BIOS Error Messages (continued) Error Message Explanation Checking NVRAM..... NVRAM is being checked to see if it is valid. 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.
Error Messages and Beep Codes 5.2 Port 80h POST Codes During the POST, the BIOS generates diagnostic progress codes (POST-codes) to I/O port 80h. If the POST fails, execution stops and the last POST code generated is left at port 80h. This code is useful for determining the point where an error occurred. Displaying the POST-codes requires a PCI bus add-in card, often called a POST card. The POST card can decode the port and display the contents on a medium such as a seven-segment display.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 79. Runtime Code Uncompressed in F000 Shadow RAM Code Description of POST Operation 03 NMI is Disabled. To check soft reset/power-on. 05 BIOS stack set. Going to disable cache if any. 06 POST code to be uncompressed. 07 CPU init and CPU data area init to be done. 08 CMOS checksum calculation to be done next. 0B Any initialization before keyboard BAT to be done next. 0C KB controller I/B free.
Error Messages and Beep Codes Table 79. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation 40 To prepare the descriptor tables. 42 To enter in virtual mode for memory test. 43 To enable interrupts for diagnostics mode. 44 To initialize data to check memory wrap around at 0:0. 45 Data initialized. Going to check for memory wrap around at 0:0 and finding the total system memory size. 46 Memory wrap around test done. Memory size calculation over.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 79. Runtime Code Uncompressed in F000 Shadow RAM (continued) Code Description of POST Operation 84 Lock-key checking over. To check for memory size mismatch with CMOS. 85 Memory size check done. To display soft error and check for password or bypass setup. 86 Password checked. About to do programming before setup. 87 Programming before setup complete. To uncompress SETUP code and execute CMOS setup.
Error Messages and Beep Codes Table 79. 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. 5.3 Bus Initialization Checkpoints The system BIOS gives control to the different buses at several checkpoints to do various tasks.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification Table 82 describes the lower nibble of the high byte and indicates the bus on which the routines are being executed. Table 82. 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 5.4 Speaker A 47 Ω inductive speaker is mounted on the Desktop Board D845GEBV2 and the Desktop Board D845GERG2.
Error Messages and Beep Codes If POST completes normally, the BIOS issues one short beep before passing control to the operating system. Table 83. Beep Codes Beep Description 1 Refresh failure 2 Parity cannot be reset 3 First 64 KB memory failure 4 Timer not operational 5 Not used 6 8042 GateA20 cannot be toggled 7 Exception interrupt error 8 Display memory R/W error 9 Not used 10 CMOS Shutdown register test error 11 Invalid BIOS (e.g. POST module not found, etc.
Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification 128
