addressing16668.com

IntelDesktopBoardsD915GAV/D915GAGTechnicalProductSpecificationJune2004OrderNumber:C68600-001TheIntelDesktopBoardD915GAV/D915GAGmaycontaindesigndefectsorerrorsknownaserratathatmaycausetheproducttodeviatefrompublishedspecifications.
CurrentcharacterizederrataaredocumentedintheIntelDesktopBoardD915GAV/D915GAGSpecificationUpdate.
RevisionHistoryRevisionRevisionHistoryDate-001FirstreleaseoftheIntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification.
June2004ThisproductspecificationappliestoonlystandardIntelDesktopBoardsD915GAVandD915GAVwithBIOSidentifierEV91510A.
86A.
ChangestothisspecificationwillbepublishedintheIntelDesktopBoardD915GAV/D915GAGSpecificationUpdatebeforebeingincorporatedintoarevisionofthisdocument.
INFORMATIONINTHISDOCUMENTISPROVIDEDINCONNECTIONWITHINTELPRODUCTS.
NOLICENSE,EXPRESSORIMPLIED,BYESTOPPELOROTHERWISE,TOANYINTELLECTUALPROPERTYRIGHTSISGRANTEDBYTHISDOCUMENT.
EXCEPTASPROVIDEDININTEL'STERMSANDCONDITIONSOFSALEFORSUCHPRODUCTS,INTELASSUMESNOLIABILITYWHATSOEVER,ANDINTELDISCLAIMSANYEXPRESSORIMPLIEDWARRANTY,RELATINGTOSALEAND/ORUSEOFINTELPRODUCTSINCLUDINGLIABILITYORWARRANTIESRELATINGTOFITNESSFORAPARTICULARPURPOSE,MERCHANTABILITY,ORINFRINGEMENTOFANYPATENT,COPYRIGHTOROTHERINTELLECTUALPROPERTYRIGHT.
INTELPRODUCTSARENOTINTENDEDFORUSEINMEDICAL,LIFESAVING,ORLIFESUSTAININGAPPLICATIONS.
IntelCorporationmayhavepatentsorpendingpatentapplications,trademarks,copyrights,orotherintellectualpropertyrightsthatrelatetothepresentedsubjectmatter.
Thefurnishingofdocumentsandothermaterialsandinformationdoesnotprovideanylicense,expressorimplied,byestoppelorotherwise,toanysuchpatents,trademarks,copyrights,orotherintellectualpropertyrights.
Intelmaymakechangestospecificationsandproductdescriptionsatanytime,withoutnotice.
Designersmustnotrelyontheabsenceorcharacteristicsofanyfeaturesorinstructionsmarked"reserved"or"undefined.
"Intelreservestheseforfuturedefinitionandshallhavenoresponsibilitywhatsoeverforconflictsorincompatibilitiesarisingfromfuturechangestothem.
Inteldesktopboardsmaycontaindesigndefectsorerrorsknownaserrata,whichmaycausetheproducttodeviatefrompublishedspecifications.
Currentcharacterizederrataareavailableonrequest.
ContactyourlocalIntelsalesofficeoryourdistributortoobtainthelatestspecificationsbeforeplacingyourproductorder.
Copiesofdocumentswhichhaveanorderingnumberandarereferencedinthisdocument,orotherIntelliterature,maybeobtainedfrom:IntelCorporationP.
O.
Box5937Denver,CO80217-9808orcallinNorthAmerica1-800-548-4725,Europe44-0-1793-431-155,France44-0-1793-421-777,Germany44-0-1793-421-333,otherCountries708-296-9333.
Intel,Pentium,andCeleronareregisteredtrademarksofIntelCorporationoritssubsidiariesintheUnitedStatesandothercountries.
*Othernamesandbrandsmaybeclaimedasthepropertyofothers.
PrefaceThisTechnicalProductSpecification(TPS)specifiestheboardlayout,components,connectors,powerandenvironmentalrequirements,andtheBIOSfortheseIntelDesktopBoards:D915GAVandD915GAG.
Itdescribesthestandardproductandavailablemanufacturingoptions.
IntendedAudienceTheTPSisintendedtoprovidedetailed,technicalinformationabouttheDesktopBoardsD915GAVandD915GAGandtheircomponentstothevendors,systemintegrators,andotherengineersandtechnicianswhoneedthislevelofinformation.
Itisspecificallynotintendedforgeneralaudiences.
WhatThisDocumentContainsChapterDescription1AdescriptionofthehardwareusedontheDesktopBoardsD915GAVandD915GAG2AmapoftheresourcesoftheDesktopBoards3ThefeaturessupportedbytheBIOSSetupprogram4AdescriptionoftheBIOSerrormessages,beepcodes,andPOSTcodesTypographicalConventionsThissectioncontainsinformationabouttheconventionsusedinthisspecification.
Notallofthesesymbolsandabbreviationsappearinallspecificationsofthistype.
Notes,Cautions,andWarningsNOTENotescallattentiontoimportantinformation.
#INTEGRATOR'SNOTESIntegrator'snotesareusedtocallattentiontoinformationthatmaybeusefultosystemintegrators.
CAUTIONCautionsareincludedtohelpyouavoiddamaginghardwareorlosingdata.
iiiIntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationWARNINGWarningsindicateconditions,whichifnotobserved,cancausepersonalinjury.
OtherCommonNotation#Usedafterasignalnametoidentifyanactive-lowsignal(suchasUSBP0#)(NxnX)Whenusedinthedescriptionofacomponent,Nindicatescomponenttype,xnaretherelativecoordinatesofitslocationontheDesktopBoardsD915GAVandD915GAG,andXistheinstanceoftheparticularpartatthatgenerallocation.
Forexample,J5J1isaconnector,locatedat5J.
Itisthefirstconnectorinthe5Jarea.
GBGigabyte(1,073,741,824bytes)GB/secGigabytespersecondKBKilobyte(1024bytes)KbitKilobit(1024bits)kbits/sec1000bitspersecondMBMegabyte(1,048,576bytes)MB/secMegabytespersecondMbitMegabit(1,048,576bits)Mbit/secMegabitspersecondxxhAnaddressordatavalueendingwithalowercasehindicatesahexadecimalvalue.
x.
xVVolts.
VoltagesareDCunlessotherwisespecified.
*Thissymbolisusedtoindicatethird-partybrandsandnamesthatarethepropertyoftheirrespectiveowners.
ivContents1ProductDescription1.
1PCIBusTerminologyChange.
111.
2BoardDifferences111.
3Overview121.
3.
1FeatureSummary.
121.
3.
2ManufacturingOptions131.
3.
3BoardLayouts141.
3.
4BlockDiagram181.
4OnlineSupport191.
5Processor.
191.
6SystemMemory201.
6.
1MemoryConfigurations221.
7Intel915GChipset261.
7.
1Intel915GGraphicsSubsystem.
261.
7.
2USB281.
7.
3IDESupport.
281.
7.
4Real-TimeClock,CMOSSRAM,andBattery.
301.
8PCIExpressConnectors.
301.
9I/OController.
301.
9.
1SerialPorts.
311.
9.
2ParallelPort.
311.
9.
3DisketteDriveController.
311.
9.
4KeyboardandMouseInterface311.
10AudioSubsystem321.
10.
1AudioSubsystemSoftware321.
10.
2AudioConnectors.
321.
10.
3IntelHighDefinitionAudioSubsystem331.
11LANSubsystem341.
11.
1Intel82562EZPhysicalLayerInterfaceDevice.
341.
11.
2RJ-45LANConnectorwithIntegratedLEDs.
341.
11.
3AlertStandardFormat(ASF)Support351.
11.
4LANSubsystemSoftware.
351.
11.
5IntelWirelessConnectTechnology(Optional)351.
12HardwareManagementSubsystem.
361.
12.
1HardwareMonitoringandFanControlASIC361.
12.
2ThermalMonitoring.
371.
12.
3FanMonitoring.
391.
12.
4ChassisIntrusionandDetection.
391.
13PowerManagement.
401.
13.
1ACPI401.
13.
2HardwareSupport42vIntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
14TrustedPlatformModule(Optional)461.
14.
1SystemRequirements461.
14.
2WarningofPotentialDataLoss.
461.
14.
3SecurityPrecautions.
471.
14.
4TrustedPlatformModuleOwnership.
481.
14.
5EnablingtheTrustedPlatformModule481.
14.
6AssumingTrustedPlatformModuleOwnership491.
14.
7RecoveryProcedures.
501.
14.
8ClearingTrustedPlatformModuleOwnership.
511.
14.
9SoftwareSupport.
512TechnicalReference2.
1Introduction532.
2MemoryResources.
532.
2.
1AddressableMemory.
532.
2.
2MemoryMap.
552.
3DMAChannels.
552.
4FixedI/OMap.
562.
5PCIConfigurationSpaceMap.
572.
6Interrupts.
582.
7PCIConventionalInterruptRoutingMap592.
8Connectors.
612.
8.
1BackPanelConnectors.
622.
8.
2Component-sideConnectors.
642.
9JumperBlock752.
10MechanicalConsiderations.
762.
10.
1D915GAVBoardFormFactor762.
10.
2D915GAGBoardFormFactor.
772.
10.
3I/OShield.
782.
11ElectricalConsiderations.
792.
11.
1DCLoading.
792.
11.
2Add-inBoardConsiderations.
792.
11.
3FanConnectorCurrentCapability.
802.
11.
4PowerSupplyConsiderations802.
12ThermalConsiderations.
812.
13Reliability.
832.
14Environmental842.
15RegulatoryCompliance.
852.
15.
1SafetyRegulations852.
15.
2EMCRegulations.
852.
15.
3EuropeanUnionDeclarationofConformityStatement.
862.
15.
4ProductEcologyStatements872.
15.
5ProductCertificationMarkings(BoardLevel)88viContents3OverviewofBIOSFeatures3.
1Introduction893.
2BIOSFlashMemoryOrganization903.
3ResourceConfiguration903.
3.
1PCIAutoconfiguration.
903.
3.
2PCIIDESupport.
903.
4SystemManagementBIOS(SMBIOS)913.
5LegacyUSBSupport.
913.
6BIOSUpdates923.
6.
1LanguageSupport.
923.
6.
2CustomSplashScreen.
923.
7BootOptions933.
7.
1CD-ROMBoot933.
7.
2NetworkBoot.
933.
7.
3BootingWithoutAttachedDevices933.
7.
4ChangingtheDefaultBootDeviceDuringPOST.
933.
8FastBootingSystemswithIntelRapidBIOSBoot.
943.
8.
1PeripheralSelectionandConfiguration.
943.
8.
2IntelRapidBIOSBoot943.
9BIOSSecurityFeatures954ErrorMessagesandBeepCodes4.
1BIOSErrorMessages974.
2Port80hPOSTCodes994.
3BusInitializationCheckpoints1034.
4Speaker1044.
5BIOSBeepCodes.
104Figures1.
D915GAVBoardComponents142.
D915GAGBoardComponents.
163.
BlockDiagram.
184.
MemoryChannelandDIMMConfiguration.
225.
DualChannel(Interleaved)ModeConfigurationwithTwoDIMMs236.
DualChannel(Interleaved)ModeConfigurationwithThreeDIMMs.
237.
DualChannel(Interleaved)ModeConfigurationwithFourDIMMs.
248.
SingleChannel(Asymmetric)ModeConfigurationwithOneDIMM.
259.
SingleChannel(Asymmetric)ModeConfigurationwithThreeDIMMs2510.
Front/BackPanelAudioConnectorOptionsforHighDefinitionAudioSubsystem.
.
.
.
.
.
3311.
HighDefinitionAudioSubsystemBlockDiagram3312.
LANConnectorLEDLocations3413.
ThermalMonitoringforD915GAVBoard3714.
ThermalMonitoringforD915GAGBoard.
3815.
LocationoftheStandbyPowerIndicatorLED4516.
DetailedSystemMemoryAddressMap.
5417.
BackPanelConnectors.
6218.
D915GAVBoardComponent-sideConnectors.
6419.
D915GAGBoardComponent-sideConnectors66viiIntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification20.
ConnectionDiagramforFrontPanelConnector.
7221.
ConnectionDiagramforFrontPanelUSBConnectors.
7422.
ConnectionDiagramforIEEE1394aConnectors.
7423.
LocationoftheJumperBlock.
7524.
D915GAVBoardDimensions.
7625.
D915GAGBoardDimensions7726.
I/OShieldDimensions.
7827.
ProcessorHeatsinkforOmni-directionalAirflow.
8128.
LocalizedHighTemperatureZones.
82Tables1.
SummaryofBoardDifferences.
112.
FeatureSummary123.
ManufacturingOptions.
134.
D915GAVBoardComponentsShowninFigure1.
155.
D915GAGBoardComponentsShowninFigure2.
176.
SupportedSystemBusFrequencyandMemorySpeedCombinations207.
SupportedMemoryConfigurations218.
LANConnectorLEDStates349.
EffectsofPressingthePowerSwitch4010.
PowerStatesandTargetedSystemPower4111.
Wake-upDevicesandEvents.
4212.
SystemMemoryMap5513.
DMAChannels.
5514.
I/OMap5615.
PCIConfigurationSpaceMap.
5716.
Interrupts.
5817.
PCIInterruptRoutingMap6018.
BackPanelConnectorsShowninFigure17.
6319.
Component-sideConnectorsShowninFigure18.
6520.
Component-sideConnectorsShowninFigure19.
6721.
S/PDIFConnector(Optional)6822.
ATAPICD-ROMConnector(Optional)6823.
FrontPanelAudioConnector.
6824.
SerialPortBConnector(optional)6825.
ChassisIntrusionConnector.
6826.
SCSIHardDriveActivityLEDConnector(Optional)6927.
SerialATAConnectors.
6928.
ProcessorFanConnector6929.
ChassisFanConnectors.
6930.
MainPowerConnector.
7031.
ATX12VPowerConnector.
7132.
AlternatePowerConnector.
7133.
AuxiliaryFrontPanelPower/SleepLEDConnector.
7234.
FrontPanelConnector.
7235.
StatesforaOne-ColorPowerLED.
7336.
StatesforaTwo-ColorPowerLED.
7337.
BIOSSetupConfigurationJumperSettings.
75viiiContents38.
DCLoadingCharacteristics7939.
FanConnectorCurrentCapability.
8040.
ThermalConsiderationsforComponents8341.
EnvironmentalSpecifications.
8442.
SafetyRegulations.
8543.
EMCRegulations8544.
ProductCertificationMarkings8845.
BIOSSetupProgramMenuBar.
9046.
BIOSSetupProgramFunctionKeys.
9047.
BootDeviceMenuOptions9348.
SupervisorandUserPasswordFunctions.
9549.
BIOSErrorMessages9750.
UncompressedINITCodeCheckpoints.
9951.
BootBlockRecoveryCodeCheckpoints9952.
RuntimeCodeUncompressedinF000ShadowRAM10053.
BusInitializationCheckpoints10354.
UpperNibbleHighByteFunctions.
10355.
LowerNibbleHighByteFunctions.
10456.
BeepCodes104ixIntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationx1ProductDescriptionWhatThisChapterContains1.
1PCIBusTerminologyChange.
111.
2BoardDifferences111.
3Overview121.
4OnlineSupport191.
5Processor.
191.
6SystemMemory201.
7Intel915GChipset261.
8PCIExpressConnectors.
301.
9I/OController.
301.
10AudioSubsystem321.
11LANSubsystem341.
12HardwareManagementSubsystem.
361.
13PowerManagement.
401.
14TrustedPlatformModule(Optional)461.
1PCIBusTerminologyChangePreviousgenerationsofIntelDesktopBoardsusedanadd-incardconnectorreferredtoasPCI.
ThisgenerationofIntelDesktopBoardsaddsanewtechnologyforadd-incards:PCIExpress.
The32-bitparallelbuspreviouslyreferredtoasPCIisnowcalledPCIConventional.
1.
2BoardDifferencesThisTPSdescribestheseIntelDesktopBoards:D915GAVandD915GAG.
TheDesktopBoardsareidenticalwiththeexceptionoftheitemslistedinTable1.
Table1.
SummaryofBoardDifferencesD915GAVATXFormFactorFourPCIConventionalbusconnectorsTwoPCIExpressx1busadd-incardconnectorsThreechassisfanconnectors(frontchassis,rearchassis1,andrearchassis2)D915GAGmicroATXFormFactorTwoPCIConventionalbusconnectorsOnePCIExpress*x1busadd-incardconnectorTwochassisfanconnectors(frontchassisandrearchassis)NOTEMostoftheillustrationsinthisdocumentshowonlytheDesktopBoardD915GAV.
WhentherearesignificantdifferencesbetweenthetwoDesktopBoards,illustrationsofbothboardsareprovided.
11IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
3Overview1.
3.
1FeatureSummaryTable2summarizesthemajorfeaturesoftheDesktopBoardsD915GAVandD915GAG.
Table2.
FeatureSummaryFormFactorD915GAV:ATX(12.
00inchesby9.
60inches[304.
80millimetersby243.
84millimeters])D915GAG:microATXFormFactor(9.
60inchesby9.
60inches[243.
84millimetersby243.
84millimeters])ProcessorSupportforanIntelPentium4processorinanLGA775socketwithan800or533MHzsystembusMemoryFourDDRSDRAMDualInlineMemoryModule(DIMM)socketsSupportforDDR400MHzandDDR333MHzDIMMsSupportforupto4GBofsystemmemoryChipsetIntel915GChipset,consistingof:Intel82915GGraphicsMemoryControllerHub(GMCH)Intel82801FBI/OControllerHub(ICH6)4MbitFirmwareHub(FWH)VideoIntelGMA900onboardgraphicssubsystemAudioIntelHighDefinitionAudiosubsystemusingtheRealtek*ALC860audiocodecI/OControlLPCBusI/OcontrollerUSBSupportforUSB2.
0devicesPeripheralInterfacesEightUSBportsOneserialportOneparallelportFourSerialATAinterfacesOneParallelATAIDEinterfacewithUDMA33,ATA-66/100supportOnediskettedriveinterfacePS/2*keyboardandmouseportsLANSupport10/100Mbits/secLANsubsystemusingtheIntel82562EZPlatformLANConnect(PLC)deviceBIOSIntel/AMIBIOS(residentinthe4MbitFWH)SupportforAdvancedConfigurationandPowerInterface(ACPI),PlugandPlay,andSMBIOSInstantlyAvailablePCTechnologySupportforPCILocalBusSpecificationRevision2.
2SupportforPCIExpressRevision1.
0aSuspendtoRAMsupportWakeonPCI,RS-232,frontpanel,PS/2devices,andUSBportscontinued12ProductDescriptionTable2.
FeatureSummary(continued)ExpansionCapabilitiesPCIConventionalbusconnectors(fourontheD915GAV;twoontheD915GAG)PCIExpressx1busadd-incardconnectors(twoontheD915GAV;oneontheD915GAG)OnePCIExpressx16busadd-incardconnector(bothboards)HardwareMonitorSubsystemHardwaremonitoringandfancontrolASICVoltagesensetodetectoutofrangepowersupplyvoltagesThermalsensetodetectoutofrangethermalvaluesThreefanconnectorsThreefansenseinputsusedtomonitorfanactivityFanspeedcontrol1.
3.
2ManufacturingOptionsTable3describesthemanufacturingoptionsontheDesktopBoardsD915GAVandD915GAG.
Noteverymanufacturingoptionisavailableinallmarketingchannels.
PleasecontactyourIntelrepresentativetodeterminewhichmanufacturingoptionsareavailabletoyou.
Table3.
ManufacturingOptionsATAPICD-ROMConnectorAconnectorforattachinganinternalCD-ROMdrivetotheonboardaudiosubsystemATXfanconnectorAdditionalfanconnectorforuseinlargerchassis(D915GAVboardonly)IEEE-1394aInterfaceIEEE-1394acontrollerandthreeIEEE-1394aconnectors(onebackpanelconnector,twofront-panelconnectors)Intel82801FBWI/OControllerHub(ICH6W)I/OcontrollerHubthatsupportsIntelWirelessConnectTechnologySCSIHardDriveActivityLEDConnectorAllowsadd-inharddrivecontrollers(SCSIorother)tousethesameLEDastheonboardIDEcontroller.
SerialPortBSecondserialportaccessibleviaaconnectoronthecomponentsideoftheboardS/PDIFConnectorA1x3connector(mountedonthecomponentsideoftheboard)thatprovidesdigitalaudiosignalsinS/PDIFformatTrustedPlatformModule(TPM)AcomponentthatenhancesplatformsecurityForinformationaboutRefertoAvailableconfigurationsfortheDesktopBoardsD915GAVandD915GAGSection1.
4,page1913IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
3.
3BoardLayoutsFigure1showsthelocationofthemajorcomponentsontheDesktopBoardD915GAV.
OM16666ABKLCDFEMNOPQRSVWXYGGZAAEEBBCCDDFFMMLLKKIIHHJJGHIJTUFigure1.
D915GAVBoardComponentsTable4liststhecomponentsidentifiedinFigure1.
14ProductDescriptionTable4.
D915GAVBoardComponentsShowninFigure1.
Item/calloutfromFigure1DescriptionARearfanconnector2BSpeakerCPCIExpressx1busadd-incardconnectorsDATAPICD-ROMconnector(optional)ES/PDIFconnector(optional)FRealtekALC860audiocodecGFrontpanelaudioconnectorHPCIConventionalbusadd-incardconnectorsIEthernetPLCdevice(optional)JPCIExpressx16busadd-incardconnectorKRearchassisfanconnector1LBackpanelconnectorsMAlternatepowerconnectorN+12Vpowerconnector(ATX12V)OLGA775processorsocketPProcessorfanconnectorQIntel82915GGMCHRDIMMChannelAsocketsSSerialportBconnector(optional)TDIMMChannelBsocketsUSCSILED(optional)VI/OcontrollerWPowerconnectorXDiskettedriveconnectorYParallelATEIDEconnectorZBatteryAAChassisintrusionconnectorBBBIOSSetupconfigurationjumperblockCC4MbitFirmwareHub(FWH)DDFrontchassisfanconnectorEESerialATAconnectorsFFAuxiliaryfrontpanelpowerLEDconnectorGGFrontpanelconnectorHHATXfanconnector(optional)IIFrontpanelUSBconnectorJJIntel82801FBI/OControllerHub(ICH6)KKFrontpanelIEEE-1394aconnectors(optional)LLIEEE-1394acontroller(optional)MMPCIConventionalbusadd-incardconnectors15IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationFigure2showsthelocationofthemajorcomponentsontheDesktopBoardD915GAG.
OM16656IJACBDKLMONPQUVWXFFYDDAABBCCEEJJKKIIGGHHEFGHSTRZFigure2.
D915GAGBoardComponentsTable5liststhecomponentsidentifiedinFigure2.
16ProductDescriptionTable5.
D915GAGBoardComponentsShowninFigure2.
Item/calloutfromFigure2DescriptionAATAPICD-ROMconnector(optional)BPCIExpressx1busadd-incardconnectorsCRealtekALC860audiocodecDS/PDIFconnector(optional)EFrontpanelaudioconnectorFPCIConventionalbusadd-incardconnectorsGEthernetPLCdevice(optional)HPCIExpressx16busadd-incardconnectorIRearchassisfanconnectorJBackpanelconnectorsKAlternatepowerconnectorL+12Vpowerconnector(ATX12V)MLGA775processorsocketNHardwaremonitoringandfancontrolASICOProcessorfanconnectorPIntel82915GGMCHQDIMMChannelAsocketsRSerialportBconnector(optional)SDIMMChannelBsocketsTSCSILEDconnector(optional)UI/OcontrollerVPowerconnectorWDiskettedriveconnectorXParallelATEIDEconnectorYBatteryZChassisintrusionconnectorAABIOSSetupconfigurationjumperblockBB4MbitFirmwareHub(FWH)CCFrontchassisfanconnectorDDSerialATAconnectorsEEAuxiliaryfrontpanelpowerLEDconnectorFFFrontpanelconnectorGGFrontpanelUSBconnectorHHIntel82801FBI/OControllerHub(ICH6)IIFrontpanelIEEE-1394aconnectors(optional)JJIEEE-1394acontroller(optional)KKSpeaker17IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
3.
4BlockDiagramFigure3isablockdiagramofthemajorfunctionalareasoftheboards.
D915GAVonlyIntel915GChipsetIntel82801FBI/OControllerHub(ICH6)Intel82915GGraphicsandMemoryControllerHub(GMCH)4MbitFirmwareHub(FWH)SystemBus(800/533MHz)LGA775ProcessorSocketParallelATAIDEConnectorDisketteDriveConnectorLPCBusI/OControllerPS/2KeyboardPS/2MouseParallelPortSerialPortsParallelATAIDEInterfaceLPCBusHardwareMonitoringandFanControlASICOM16997AudioCodecRetaskingJackF[Port2]LineOut/RetaskingJackDCD-ROM(optional)RetaskingJackE[Port1]LANConnector10/100LANPLC(Optional)PCIExpressx16InterfacePCIExpressx16Connector=connectororsocketPCIBusSMBusHighDefinitionAudioLinkUSBDual-ChannelMemoryBusSMBusPCISlot1PCISlot2PCISlot3PCISlot4MicIn/RetaskingJackBLineIn/RetaskingJackCS/PDIF(optional)SerialATAIDEConnectors(4)SerialATAIDEInterfaceVGAPortDisplayInterfaceChannelADIMMs(2)ChannelBDIMMs(2)BackPanel/FrontPanelUSBPortsDMIInterconnectPCIBusTPMComponent(Optional)LPCBusIEEE-1394aConnectors(Optional)LANConnectInterfaceD915GAVonlyPCIExpressx1Slot1PCIExpressx1Slot2PCIExpressx1InterfaceFigure3.
BlockDiagram18ProductDescription1.
4OnlineSupportTofindinformationabout…VisitthisWorldWideWebsite:IntelDesktopBoardsD915GAVandD915GAGunder"DesktopBoardProducts"or"DesktopBoardSupport"http://www.
intel.
com/design/motherbdhttp://support.
intel.
com/support/motherboards/desktopAvailableconfigurationsfortheDesktopBoardD915GAVhttp://developer.
intel.
com/design/motherbd/av/av_available.
htmAvailableconfigurationsfortheDesktopBoardD915GAGhttp://developer.
intel.
com/design/motherbd/ag/ag_available.
htmProcessordatasheetshttp://www.
intel.
com/design/litcentrICH6addressinghttp://developer.
intel.
com/design/chipsets/datashtsCustomsplashscreenshttp://intel.
com/design/motherbd/gen_indx.
htmAudiosoftwareandutilitieshttp://www.
intel.
com/design/motherbdLANsoftwareanddrivershttp://www.
intel.
com/design/motherbd1.
5ProcessorTheboardsaredesignedtosupportIntelPentium4processorsinanLGA775processorsocketwithan800or533MHzsystembus.
SeetheIntelwebsitelistedbelowforthemostup-to-datelistofsupportedprocessors.
Forinformationabout…Referto:SupportedprocessorsfortheD915GAVboardhttp://www.
intel.
com/design/motherbd/av/av_proc.
htmSupportedprocessorsfortheD915GAGboardhttp://www.
intel.
com/design/motherbd/ag/ag_proc.
htmCAUTIONUseonlytheprocessorslistedonwebsiteabove.
Useofunsupportedprocessorscandamagetheboard,theprocessor,andthepowersupply.
#INTEGRATOR'SNOTEUseonlyATX12V-compliantpowersupplies.
RefertoTable6onpage20foralistofsupportedsystembusfrequencyandmemoryspeedcombinations.
ForinformationaboutRefertoPowersupplyconnectorsSection2.
8.
2.
2,page7019IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
6SystemMemoryTheboardshavefourDIMMsocketsandsupportthefollowingmemoryfeatures:2.
5V(only)DDRSDRAMDIMMswithgold-platedcontactsUnbuffered,single-sidedordouble-sidedDIMMswiththefollowingrestriction:Double-sidedDIMMSwithx16organizationarenotsupported.
4GBmaximumtotalsystemmemory.
RefertoSection2.
2.
1onpage53forinformationonthetotalamountofaddressablememory.
Minimumtotalsystemmemory:128MBNon-ECCDIMMsSerialPresenceDetectDDR400MHzandDDR333MHzSDRAMDIMMsTable6liststhesupportedsystembusfrequencyandmemoryspeedcombinations.
Table6.
SupportedSystemBusFrequencyandMemorySpeedCombinationsTousethistypeofDIMM…Theprocessor'ssystembusfrequencymustbe…DDR400800MHzDDR333(Note)800or533MHzNote:Whenusingan800MHzsystembusfrequencyprocessor,DDR333memoryisclockedat320MHz.
Thisminimizessystemlatenciestooptimizesystemthroughput.
NOTESRemovethePCIExpressx16videocardbeforeinstallingorupgradingmemorytoavoidinterferencewiththememoryretentionmechanism.
TobefullycompliantwithallapplicableDDRSDRAMmemoryspecifications,theboardshouldbepopulatedwithDIMMsthatsupporttheSerialPresenceDetect(SPD)datastructure.
ThisallowstheBIOStoreadtheSPDdataandprogramthechipsettoaccuratelyconfigurememorysettingsforoptimumperformance.
Ifnon-SPDmemoryisinstalled,theBIOSwillattempttocorrectlyconfigurethememorysettings,butperformanceandreliabilitymaybeimpactedortheDIMMsmaynotfunctionunderthedeterminedfrequency.
20ProductDescriptionTable7liststhesupportedDIMMconfigurations.
Table7.
SupportedMemoryConfigurationsDIMMCapacityConfigurationSDRAMDensitySDRAMOrganizationFront-side/Back-sideNumberofSDRAMDevices128MBSS256Mbit16Mx16/empty4256MBSS256Mbit32Mx8/empty8256MBSS512Mbit32Mx16/empty4512MBDS256Mbit32Mx8/32Mx816512MBSS512Mbit64Mx8/empty8512MBSS1Gbit64Mx16/empty41024MBDS512Mbit64Mx8/64Mx8161024MBSS1Gbit128Mx8/empty82048MBDS1Gbit128Mx8/128Mx816Note:Inthesecondcolumn,"DS"referstodouble-sidedmemorymodules(containingtworowsofSDRAM)and"SS"referstosingle-sidedmemorymodules(containingonerowofSDRAM).
#INTEGRATOR'SNOTEItispossibletoinstallfour2048MB(2GB)modulesforatotalof8GBofsystemmemory,however,only4GBofaddressspaceisavailable.
RefertoSection2.
2.
1,onpage53foradditionalinformationonavailablememory.
21IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
6.
1MemoryConfigurationsTheIntel82915GGMCHsupportstwotypesofmemoryorganization:Dualchannel(Interleaved)mode.
Thismodeoffersthehighestthroughputforrealworldapplications.
DualchannelmodeisenabledwhentheinstalledmemorycapacitiesofbothDIMMchannelsareequal.
Technologyanddevicewidthcanvaryfromonechanneltotheotherbuttheinstalledmemorycapacityforeachchannelmustbeequal.
IfdifferentspeedDIMMsareusedbetweenchannels,theslowestmemorytimingwillbeused.
Singlechannel(Asymmetric)mode.
Thismodeisequivalenttosinglechannelbandwidthoperationforrealworldapplications.
ThismodeisusedwhenonlyasingleDIMMisinstalledorthememorycapacitiesareunequal.
Technologyanddevicewidthcanvaryfromonechanneltotheother.
IfdifferentspeedDIMMsareusedbetweenchannels,theslowestmemorytimingwillbeused.
Figure4illustratesthememorychannelandDIMMconfiguration.
NOTETheDIMM0socketsofbothchannelsareblue.
TheDIMM1socketsofbothchannelsareblack.
OM16667ChannelA,DIMM0ChannelA,DIMM1ChannelB,DIMM0ChannelB,DIMM1Figure4.
MemoryChannelandDIMMConfiguration22ProductDescription1.
6.
1.
1DualChannel(Interleaved)ModeConfigurationsFigure5showsadualchannelconfigurationusingtwoDIMMs.
Inthisexample,theDIMM0(blue)socketsofbothchannelsarepopulatedwithidenticalDIMMs.
OM17123ChannelA,DIMM0ChannelA,DIMM1ChannelB,DIMM0ChannelB,DIMM11GB1GBFigure5.
DualChannel(Interleaved)ModeConfigurationwithTwoDIMMsFigure6showsadualchannelconfigurationusingthreeDIMMs.
Inthisexample,thecombinedcapacityofthetwoDIMMsinChannelAequalthecapacityofthesingleDIMMintheDIMM0(blue)socketofChannelB.
OM17122ChannelA,DIMM0ChannelA,DIMM1ChannelB,DIMM0ChannelB,DIMM1256MB512MB256MBFigure6.
DualChannel(Interleaved)ModeConfigurationwithThreeDIMMs23IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationFigure7showsadualchannelconfigurationusingfourDIMMs.
Inthisexample,thecombinedcapacityofthetwoDIMMsinChannelAequalthecombinedcapacityofthetwoDIMMsinChannelB.
Also,theDIMMsarematchedbetweenDIMM0andDIMM1ofbothchannels.
OM17124ChannelA,DIMM0ChannelA,DIMM1ChannelB,DIMM0ChannelB,DIMM1256MB256MB512MB512MBFigure7.
DualChannel(Interleaved)ModeConfigurationwithFourDIMMs24ProductDescription1.
6.
1.
2SingleChannel(Asymmetric)ModeConfigurationsNOTEDualchannel(Interleaved)modeconfigurationsprovidethehighestmemorythroughput.
Figure8showsasinglechannelconfigurationusingoneDIMM.
Inthisexample,onlytheDIMM0(blue)socketofChannelAispopulated.
ChannelBisnotpopulated.
OM17125ChannelA,DIMM0ChannelA,DIMM1ChannelB,DIMM0ChannelB,DIMM1256MBFigure8.
SingleChannel(Asymmetric)ModeConfigurationwithOneDIMMFigure9showsasinglechannelconfigurationusingthreeDIMMs.
Inthisexample,thecombinedcapacityofthetwoDIMMsinChannelAdoesnotequalthecapacityofthesingleDIMMintheDIMM0(blue)socketofChannelB.
OM17126ChannelA,DIMM0ChannelA,DIMM1ChannelB,DIMM0ChannelB,DIMM1256MB512MB512MBFigure9.
SingleChannel(Asymmetric)ModeConfigurationwithThreeDIMMs25IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
7Intel915GChipsetTheIntel915Gchipsetconsistsofthefollowingdevices:Intel82915GGraphicsMemoryControllerHub(GMCH)withDirectMediaInterface(DMI)interconnectIntel82801FBI/OControllerHub(ICH6)withDMIinterconnectFirmwareHub(FWH)TheGMCHisacentralizedcontrollerforthesystembus,thememorybus,thePCIExpressbus,andtheDMIinterconnect.
TheICH6isacentralizedcontrollerfortheboard'sI/Opaths.
TheFWHprovidesthenonvolatilestorageoftheBIOS.
ForinformationaboutRefertoTheIntel915Gchipsethttp://developer.
intel.
com/ResourcesusedbythechipsetChapter21.
7.
1Intel915GGraphicsSubsystemTheIntel915Gchipsetcontainstwoseparate,mutuallyexclusivegraphicsoptions.
EithertheGMA900graphicscontroller(containedwithinthe82915GGMCH)isused,oraPCIExpressx16add-incardcanbeused.
WhenaPCIExpressx16add-incardisinstalled,theGMA900graphicscontrollerisdisabled.
1.
7.
1.
1IntelGMA900GraphicsControllerTheIntelGMA900graphicscontrollerfeaturesthefollowing:Integratedgraphicscontroller32bpp(BitsPerPixel)graphicsengine333MHzcorefrequency256-bit2-Dengine32-bit3-DengineMotionvideoaccelerationPixelShader2.
04-pixelpipesDirectX*9.
0HardwareAccelerationSoftwareVertexShaderUpto2048x1536at75HzrefreshWithAdvancedDigitalDisplay2(ADD2)cardsupportflatpaneldisplaysupto2048x1536at75HzordigitalCRTs/HDTVdisplaysat1920x1080at85HzHighperformance3-DsetupandrenderengineHighquality/performancetextureengineDisplayIntegrated24-bit400MHzRAMDACDDC2Bcompliantinterface26ProductDescriptionVideoAsynchronousdualmonitordisplaywithADD2cardHardwaremotioncompensationforsoftwareMPEG2decodeTwomultiplexedDVOportinterfaceswith200MHzpixelclocksusinganADD2cardDynamicVideoMemoryTechnology(DVMT)supportupto224MBIntelZoomUtilityForinformationaboutRefertoDVMTSection1.
7.
1.
2,page27ObtaininggraphicssoftwareandutilitiesSection1.
4,page191.
7.
1.
2DynamicVideoMemoryTechnology(DVMT)DVMTenablesenhancedgraphicsandmemoryperformancethroughDirectAGP,andhighlyefficientmemoryutilization.
DVMTensuresthemostefficientuseofavailablesystemmemoryformaximum2-D/3-Dgraphicsperformance.
Upto224MBofsystemmemorycanbeallocatedtoDVMTonsystemsthathave512MBormoreoftotalsystemmemoryinstalled.
Upto128MBcanbeallocatedtoDVMTonsystemsthathave256MBbutlessthan512MBoftotalinstalledsystemmemory.
Upto64MBcanbeallocatedtoDVMTwhenlessthan256MBofsystemmemoryisinstalled.
DVMTreturnssystemmemorybacktotheoperatingsystemwhentheadditionalsystemmemoryisnolongerrequiredbythegraphicssubsystem.
DVMTwillalwaysuseaminimalfixedportionofsystemphysicalmemory(assetintheBIOSSetupprogram)forcompatibilitywithlegacyapplications.
AnexampleofthiswouldbewhenusingVGAgraphicsunderDOS.
Onceloaded,theoperatingsystemandgraphicsdriversallocateadditionalsystemmemorytothegraphicsbufferasneededforperforminggraphicsfunctions.
NOTETheuseofDVMTrequiresoperatingsystemdriversupport.
1.
7.
1.
3AdvancedDigitalDisplay2(ADD2)CardSupportTheGMCHroutestwomultiplexedDVOportsthatareeachcapableofdrivinguptoa200MHzpixelclocktothePCIExpressx16connector.
TheDVOportscanbepairedforadualchannelconfigurationtosupportuptoa400MHzpixelclock.
WhenanADD2cardisdetected,theIntelGMA900graphicscontrollerisenabledandthePCIExpressx16connectorisconfiguredforDVOmode.
DVOmodeenablestheDVOportstobeaccessedbytheADD2card.
AnADD2cardcaneitherbeconfiguredtosupportsimultaneousdisplaywiththeprimaryVGAdisplayorcanbeconfiguredtosupportdualindependentdisplayasanextendeddesktopconfigurationwithdifferentcolordepthsandresolutions.
ADD2cardscanbedesignedtosupportthefollowingconfigurations:TV-Out(compositevideo)TransitionMinimizedDifferentialSignaling(TMDS)forDVI1.
0LowVoltageDifferentialSignaling(LVDS)SingledeviceoperatingindualchannelmodeVGAoutputHDTVoutput27IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
7.
1.
4ConfigurationModesAlistofsupportedmodesfortheIntelGMA900graphicscontrollerisavailableasadownloadabledocument.
ForinformationaboutRefertoSupportedmodesfortheD915GAVboardhttp://www.
intel.
com/design/motherbd/av/av_prdoc.
htmSupportedmodesfortheD915GAGboardhttp://www.
intel.
com/design/motherbd/ag/ag_prdoc.
htm1.
7.
2USBTheboardssupportuptoeightUSB2.
0ports,supportsUHCIandEHCI,andusesUHCI-andEHCI-compatibledrivers.
TheICH6providestheUSBcontrollerforallports.
Theportarrangementisasfollows:FourportsareimplementedwithdualstackedbackpanelconnectorsadjacenttotheaudioconnectorsFourportsareroutedtotwoseparatefrontpanelUSBconnectorsNOTEComputersystemsthathaveanunshieldedcableattachedtoaUSBportmaynotmeetFCCClassBrequirements,evenifnodeviceisattachedtothecable.
Useshieldedcablethatmeetstherequirementsforfull-speeddevices.
ForinformationaboutRefertoThelocationoftheUSBconnectorsonthebackpanelFigure17,page62ThelocationofthefrontpanelUSBconnectorsontheD915GAVboardFigure18,page64ThelocationofthefrontpanelUSBconnectorsontheD915GAGboardFigure19,page661.
7.
3IDESupportTheboardsprovidesfiveIDEinterfaceconnectors:OneparallelATAIDEconnectorthatsupportstwodevicesFourserialATAIDEconnectorsthatsupportonedeviceperconnector1.
7.
3.
1ParallelATEIDEInterfaceTheICH6'sParallelATAIDEcontrollerhasonebus-masteringParallelATAIDEinterface.
TheParallelATAIDEinterfacesupportsthefollowingmodes:ProgrammedI/O(PIO):processorcontrolsdatatransfer.
8237-styleDMA:DMAoffloadstheprocessor,supportingtransferratesofupto16MB/sec.
UltraDMA:DMAprotocolonIDEbussupportinghostandtargetthrottlingandtransferratesofupto33MB/sec.
ATA-66:DMAprotocolonIDEbussupportinghostandtargetthrottlingandtransferratesofupto66MB/sec.
ATA-66protocolissimilartoUltraDMAandisdevicedrivercompatible.
ATA-100:DMAprotocolonIDEbusallowshostandtargetthrottling.
TheICH6'sATA-100logiccanachievereadtransferratesupto100MB/secandwritetransferratesupto88MB/sec.
28ProductDescriptionNOTEATA-66andATA-100arefastertimingsandrequireaspecializedcabletoreducereflections,noise,andinductivecoupling.
TheParallelATAIDEinterfacealsosupportsATAPIdevices(suchasCD-ROMdrives)andATAdevicesusingthetransfermodes.
TheBIOSsupportsLogicalBlockAddressing(LBA)andExtendedCylinderHeadSector(ECHS)translationmodes.
ThedrivereportsthetransferrateandtranslationmodetotheBIOS.
TheboardssupportLaserServo(LS-120)diskettetechnologythroughtheParallelATAIDEinterfaces.
AnLS-120drivecanbeconfiguredasabootdevicebysettingtheBIOSSetupprogram'sBootmenutooneofthefollowing:ARMD-FDD(ATAPIremovablemediadevice–floppydiskdrive)ARMD-HDD(ATAPIremovablemediadevice–harddiskdrive)ForinformationaboutRefertoThelocationoftheParallelATAIDEconnectorontheD915GAVboardFigure18,page64ThelocationoftheParallelATAIDEconnectorontheD915GAGboardFigure19,page661.
7.
3.
2SerialATAInterfacesTheICH6'sSerialATAcontrolleroffersfourindependentSerialATAportswithatheoreticalmaximumtransferrateof150MB/sperport.
OnedevicecanbeinstalledoneachportforamaximumoffourSerialATAdevices.
Apoint-to-pointinterfaceisusedforhosttodeviceconnections,unlikeParallelATAIDEwhichsupportsamaster/slaveconfigurationandtwodevicesperchannel.
Forcompatibility,theunderlyingSerialATAfunctionalityistransparenttotheoperatingsystem.
TheSerialATAcontrollercanoperateinbothlegacyandnativemodes.
Inlegacymode,standardIDEI/OandIRQresourcesareassigned(IRQ14and15).
InNativemode,standardPCIConventionalbusresourcesteeringisused.
NativemodeisthepreferredmodeforconfigurationsusingtheWindows*XPandWindows2000operatingsystems.
NOTEManySerialATAdrivesusenewlow-voltagepowerconnectorsandrequireadaptorsorpowersuppliesequippedwithlow-voltagepowerconnectors.
Formoreinformation,see:http://www.
serialata.
org/ForinformationaboutRefertoThelocationoftheSerialATAIDEconnectorsontheD915GAVboardFigure18,page64ThelocationoftheSerialATAIDEconnectorsontheD915GAGboardFigure19,page661.
7.
3.
3SCSIHardDriveActivityLEDConnector(Optional)TheSCSIharddriveactivityLEDconnectorisa1x2-pinconnectorthatallowsanadd-inharddrivecontrollertousethesameLEDastheonboardIDEcontroller.
Forproperoperation,thisconnectorshouldbewiredtotheLEDoutputoftheadd-inharddrivecontroller.
TheLED29IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationindicateswhendataisbeingreadfrom,orwrittento,eithertheadd-inharddrivecontrollerortheonboardIDEcontroller(ParallelATAorSerialATA).
ForinformationaboutRefertoThelocationoftheSCSIharddriveactivityLEDconnectorontheD915GAVboardFigure18,page64ThelocationoftheSCSIharddriveactivityLEDconnectorontheD915GAGboardFigure19,page66ThesignalnamesoftheSCSIharddriveactivityLEDconnectorTable26,page691.
7.
4Real-TimeClock,CMOSSRAM,andBatteryAcoin-cellbattery(CR2032)powersthereal-timeclockandCMOSmemory.
Whenthecomputerisnotpluggedintoawallsocket,thebatteryhasanestimatedlifeofthreeyears.
Whenthecomputerispluggedin,thestandbycurrentfromthepowersupplyextendsthelifeofthebattery.
Theclockisaccurateto±13minutes/yearat25Cwith3.
3VSBapplied.
NOTEIfthebatteryandACpowerfail,customdefaults,ifpreviouslysaved,willbeloadedintoCMOSRAMatpower-on.
1.
8PCIExpressConnectorsTheboardsprovidethefollowingPCIExpressconnectors:OnePCIExpressx16connectorsupportingsimultaneoustransferspeedsupto8GBytes/secTwoPCIExpressx1connectors.
Thex1interfacessupportsimultaneoustransferspeedsupto500MBytes/secThePCIExpressinterfacesupportsthePCIConventionalbusconfigurationmechanismsothattheunderlyingPCIExpressarchitectureiscompatiblewithPCIConventionalcompliantoperatingsystems.
AdditionalfeaturesofthePCIExpressinterfaceincludesthefollowing:SupportforthePCIExpressenhancedconfigurationmechanismAutomaticdiscovery,linktraining,andinitializationSupportforActiveStatePowerManagement(ASPM)SMBus2.
0supportWake#signalsupportingwakeeventsfromACPIS1,S3,S4,orS5SoftwarecompatiblewiththePCIPowerManagementEvent(PME)mechanismdefinedinthePCIPowerManagementSpecificationRev.
1.
11.
9I/OControllerTheI/Ocontrollerprovidesthefollowingfeatures:Twoserialports(SerialPortBisoptional)OneparallelportwithExtendedCapabilitiesPort(ECP)andEnhancedParallelPort(EPP)supportSerialIRQinterfacecompatiblewithserializedIRQsupportforPCIConventionalbussystems30ProductDescriptionPS/2-stylemouseandkeyboardinterfacesInterfaceforone1.
44MBor2.
88MBdiskettedriveIntelligentpowermanagement,includingaprogrammablewake-upeventinterfacePCIConventionalbuspowermanagementsupportTheBIOSSetupprogramprovidesconfigurationoptionsfortheI/Ocontroller.
1.
9.
1SerialPortsTheDesktopBoardcansupportuptotwoserialportconnectors.
SerialportAislocatedonthebackpanel.
SerialportB(optional)isaccessibleusingaconnectoronthecomponentsideofboard.
Theserialportssupportdatatransfersatspeedsupto115.
2kbits/secwithBIOSsupport.
ForinformationaboutRefertoThelocationoftheserialportAconnectorFigure17,page62ThelocationoftheserialportBconnectorontheD915GAVboardFigure18,page64ThelocationoftheserialportBconnectorontheD915GAGboardFigure19,page66ThesignalnamesoftheserialportBconnectorTable24,page681.
9.
2ParallelPortThe25-pinD-Subparallelportconnectorislocatedonthebackpanel.
UsetheBIOSSetupprogramtosettheparallelportmode.
ForinformationaboutRefertoThelocationoftheparallelportconnectorFigure17,page621.
9.
3DisketteDriveControllerTheI/Ocontrollersupportsonediskettedrive.
UsetheBIOSSetupprogramtoconfigurethediskettedriveinterface.
ForinformationaboutRefertoThelocationofthediskettedriveconnectorontheD915GAVboardFigure18,page64ThelocationofthediskettedriveconnectorontheD915GAGboardFigure19,page661.
9.
4KeyboardandMouseInterfacePS/2keyboardandmouseconnectorsarelocatedonthebackpanel.
NOTEThekeyboardissupportedinthebottomPS/2connectorandthemouseissupportedinthetopPS/2connector.
Powertothecomputershouldbeturnedoffbeforeakeyboardormouseisconnectedordisconnected.
ForinformationaboutRefertoThelocationofthekeyboardandmouseconnectorsFigure17,page6231IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification321.
10AudioSubsystemTheboardssupporttheIntelHighDefinitionaudiosubsystembasedontheRealtekALC860codec.
Theaudiosubsystemsupportsthefollowingfeatures:Advancedjacksense(frontandrearpanel)thatenablestheaudiocodectorecognizethedevicethatisconnectedtoanaudioport.
Alljacksarecapableofretaskingaccordingtouser'sdefinition,orcanbeautomaticallyswitcheddependingontherecognizeddevicetype.
StereoinputandoutputforalljacksAsignal-to-noise(S/N)ratioof90dB#INTEGRATOR'SNOTEForthefrontpaneljacksensingandautomaticretaskingfeaturetofunction,afrontpaneldaughtercardthatisdesignedforIntelHighDefinitionAudiomustbeused.
Otherwise,anAC'97styleaudiofrontpanelconnectorwillbeassumedandtheLineOutandMicInfunctionswillbepermanent.
1.
10.
1AudioSubsystemSoftwareAudiosoftwareanddriversareavailablefromIntel'sWorldWideWebsite.
ForinformationaboutRefertoObtainingaudiosoftwareanddriversSection1.
4,page191.
10.
2AudioConnectorsTheboardscontainaudioconnectoronboththebackpanelandthecomponentsideoftheboard.
Thecomponent-sideaudioconnectorsincludethefollowing:Frontpanelaudio(a2x5-pinconnectorthatprovidesmicinandlineoutsignalsforfrontpanelaudioconnectors)ATAPICD-ROM(anoptional1x4-pinATAPI-styleconnectorforconnectinganinternalATAPICD-ROMdrivetotheaudiomixer)S/PDIF(anoptional1x3connectorthatprovidesS/PDIFoutputsignals)Thefunctionsofthebackpanelaudioconnectorsaredependentonwhichsubsystemispresent.
ForinformationaboutRefertoThelocationofthefrontpanelaudioconnector,theoptionalATAPICD-ROMconnector,andtheoptionalS/PDIFconnectorontheD915GAVboardFigure18,page64Thelocationofthefrontpanelaudioconnector,theoptionalATAPICD-ROMconnector,andtheoptionalS/PDIFconnectorontheD915GAGboardFigure19,page66ThesignalnamesofthefrontpanelaudioconnectorTable23,page68ThesignalnamesoftheoptionalATAPICD-ROMconnectorTable22,page68ThesignalnamesoftheoptionalS/PDIFconnectorTable21,page68ProductDescription1.
10.
3IntelHighDefinitionAudioSubsystemTheIntelHighDefinitionAudiosubsystemincludesthefollowing:Intel82801FBI/OControllerHub(ICH6)RealtekALC860audiocodecMicrophoneinputthatsupportsasingledynamic,condenser,orelectretmicrophoneThefrontandbackaudioconnectorsareconfigurablethroughtheaudiodevicedrivers.
TheavailableconfigurableaudioportsareshowninFigure10.
BackPanelAudioConnectorsLineIn/RetaskingJackCLineOut/RetaskingJackDMicIn/RetaskingJackBOM16989MicIn/RetaskingJackE[Port1]FrontPanelAudioConnectorsLineOut/RetaskingJackF[Port2]Figure10.
Front/BackPanelAudioConnectorOptionsforHighDefinitionAudioSubsystemFigure11isablockdiagramoftheHighDefinitionaudiosubsystem.
82801FBI/OControllerHub(ICH6)OM16990IntelHighDefinitionAudioLinkALC860AudioCodecLineOut/RetaskingJackDFrontPanelLineOut/RetaskingJackF[Port2]CD-ROM(optional)LineIn/RetaskingJackCMicIn/RetaskingJackBS/PDIF(optional)FrontPanelMicIn/RetaskingJackE[Port1]Figure11.
HighDefinitionAudioSubsystemBlockDiagramForinformationaboutRefertoThebackpanelaudioconnectorsFigure17,page6233IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
11LANSubsystemThe10/100Mbits/secLANsubsystemconsistsofthefollowing:TheIntel82801FBICH6AnIntel82562EZPlatformLANConnect(PLC)devicefor10/100Mbits/secEthernetLANconnectivityAnRJ-45LANconnectorwithintegratedstatusLEDsAdditionalfeaturesoftheLANsubsysteminclude:CSMA/CDprotocolengineLANConnectInterface(LCI)betweenthe82562EZandtheICH6PCIConventionalbuspowermanagementSupportsACPItechnologySupportsLANwakecapabilities1.
11.
1Intel82562EZPhysicalLayerInterfaceDeviceTheIntel82562EZprovidesthefollowingfunctions:Basic10/100EthernetLANconnectivityFulldevicedrivercompatibilityProgrammabletransitthresholdConfigurationEEPROMthatcontainstheMACaddress1.
11.
2RJ-45LANConnectorwithIntegratedLEDsTwoLEDsarebuiltintotheRJ-45LANconnector(showninFigure12below).
OM15076GreenLEDYellowLEDFigure12.
LANConnectorLEDLocationsTable8describestheLEDstateswhentheboardispoweredupandthe10/100Mbits/secLANsubsystemisoperating.
Table8.
LANConnectorLEDStatesLEDColorLEDStateConditionOffLANlinkisnotestablished.
OnLANlinkisestablished.
GreenBlinkingLANactivityisoccurring.
Off10Mbits/secdatarateisselected.
YellowOn100Mbits/secdatarateisselected.
34ProductDescription1.
11.
3AlertStandardFormat(ASF)SupportTheboardsprovidethefollowingASFsupportforPCIExpressx1busadd-inLANcardsandPCIConventionalbusadd-inLANcardsinstalledinPCIConventionalbusslot2:Monitoringofsystemfirmwareprogressevents,including:BIOSpresentPrimaryprocessorinitializationMemoryinitializationVideoinitializationPCIresourceconfigurationHard-diskinitializationUserauthenticationStartingoperatingsystembootprocessMonitoringofsystemfirmwareerrorevents,including:MemorymissingMemoryfailureNovideodeviceKeyboardfailureHard-diskfailureNobootmediaBootoptionstobootfromdifferenttypesofbootdevicesReset,shutdown,powercycle,andpowerupoptions1.
11.
4LANSubsystemSoftwareLANsoftwareanddriversareavailablefromIntel'sWorldWideWebsite.
ForinformationaboutRefertoObtainingLANsoftwareanddriversSection1.
4,page191.
11.
5IntelWirelessConnectTechnology(Optional)IntelWirelessConnectTechnologyisavailableforIntel82801FBW(ICH6W)basedSKUsthatuseanIntelPRO/Wireless2225BGadd-incard.
IntelWirelessConnectTechnologyenablesanydesktopPCtojoinawirelessnetworkorprovidewirelessAccessPointservicestoahomeorsmallofficenetworkthroughawirelessconfigurationwizard.
IntelWirelessConnectTechnologyfeaturesthefollowing:WirelessLANprotocols802.
11b,g11Mbpsperformancewith802.
11b54Mbpsperformancewith802.
11gWEP,WPA(TKIP/802.
1x),andMACAddressfilteringforsecurityWi-FiandWHQLcertifiedIntegratedAccessPointthatcansupportupto16clients35IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
12HardwareManagementSubsystemThehardwaremanagementfeaturesenabletheDesktopBoardstobecompatiblewiththeWiredforManagement(WfM)specification.
TheDesktopBoardhasseveralhardwaremanagementfeatures,includingthefollowing:Fanmonitoringandcontrol(throughthehardwaremonitoringandfancontrolASIC)ThermalandvoltagemonitoringChassisintrusiondetection1.
12.
1HardwareMonitoringandFanControlASICThefeaturesofthehardwaremonitoringandfancontrolASICinclude:InternalambienttemperaturesensorTworemotethermaldiodesensorsfordirectmonitoringofprocessortemperatureandambienttemperaturesensingPowersupplymonitoringoffivevoltages(+5V,+12V,+3.
3VSB,+1.
5V,and+VCCP)todetectlevelsaboveorbelowacceptablevaluesThermallymonitoredclosed-loopfancontrol,forallthreefans,thatcanadjustthefanspeedorswitchthefansonoroffasneededSMBusinterfaceForinformationaboutRefertoThelocationofthefanconnectorsandsensorsforthermalmonitoringontheD915GAVboardFigure13,page37ThelocationofthefanconnectorsandsensorsforthermalmonitoringontheD915GAGboardFigure14,page3836ProductDescription1.
12.
2ThermalMonitoringFigure13showsthelocationofthesensorsandfanconnectorsfortheD915GAVboard.
OM16669ABEFGHDC1314131313ItemDescriptionAThermaldiode,locatedonprocessordieBRemoteambienttemperaturesensorCAmbienttemperaturesensor,internaltohardwaremonitoringandfancontrolASICDProcessorfanERearchassisfan1FFrontchassisfanGATXfan(optional)HRearchassisfan2Figure13.
ThermalMonitoringforD915GAVBoard37IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationFigure14showsthelocationofthesensorsandfanconnectorsfortheD915GAGboard.
OM16659ABEFDC141313ItemDescriptionAThermaldiode,locatedonprocessordieBRemoteambienttemperaturesensorCAmbienttemperaturesensor,internaltohardwaremonitoringandfancontrolASICDProcessorfanERearchassisfanFFrontchassisfanFigure14.
ThermalMonitoringforD915GAGBoard38ProductDescription1.
12.
3FanMonitoringFanmonitoringcanbeimplementedusingIntelDesktopUtilities,LANDesk*software,orthird-partysoftware.
ThelevelofmonitoringandcontrolisdependentonthehardwaremonitoringASICusedwiththeDesktopBoard.
ForinformationaboutRefertoThefunctionsofthefanconnectorsSection1.
13.
2.
2,page431.
12.
4ChassisIntrusionandDetectionTheboardssupportachassissecurityfeaturethatdetectsifthechassiscoverisremoved.
Thesecurityfeatureusesamechanicalswitchonthechassisthatattachestothechassisintrusionconnector.
Whenthechassiscoverisremoved,themechanicalswitchisintheclosedposition.
39IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification1.
13PowerManagementPowermanagementisimplementedatseverallevels,including:SoftwaresupportthroughAdvancedConfigurationandPowerInterface(ACPI)Hardwaresupport:PowerconnectorFanconnectorsLANwakecapabilitiesInstantlyAvailablePCtechnologyResumeonRingWakefromUSBWakefromPS/2devicesPowerManagementEventsignal(PME#)wake-upsupport1.
13.
1ACPIACPIgivestheoperatingsystemdirectcontroloverthepowermanagementandPlugandPlayfunctionsofacomputer.
TheuseofACPIwiththeseboardsrequiresanoperatingsystemthatprovidesfullACPIsupport.
ACPIfeaturesinclude:PlugandPlay(includingbusanddeviceenumeration)Powermanagementcontrolofindividualdevices,add-inboards(someadd-inboardsmayrequireanACPI-awaredriver),videodisplays,andharddiskdrivesMethodsforachievinglessthan15-wattsystemoperationinthepower-on/standbysleepingstateASoft-offfeaturethatenablestheoperatingsystemtopower-offthecomputerSupportformultiplewake-upevents(seeTable11onpage42)SupportforafrontpanelpowerandsleepmodeswitchTable9liststhesystemstatesbasedonhowlongthepowerswitchispressed,dependingonhowACPIisconfiguredwithanACPI-awareoperatingsystem.
Table9.
EffectsofPressingthePowerSwitchIfthesystemisinthisstate……andthepowerswitchispressedfor…thesystementersthisstateOff(ACPIG2/G5–Softoff)LessthanfoursecondsPower-on(ACPIG0–workingstate)On(ACPIG0–workingstate)LessthanfoursecondsSoft-off/Standby(ACPIG1–sleepingstate)On(ACPIG0–workingstate)MorethanfoursecondsFailsafepower-off(ACPIG2/G5–Softoff)Sleep(ACPIG1–sleepingstate)LessthanfoursecondsWake-up(ACPIG0–workingstate)Sleep(ACPIG1–sleepingstate)MorethanfoursecondsPower-off(ACPIG2/G5–Softoff)40ProductDescription1.
13.
1.
1SystemStatesandPowerStatesUnderACPI,theoperatingsystemdirectsallsystemanddevicepowerstatetransitions.
Theoperatingsystemputsdevicesinandoutoflow-powerstatesbasedonuserpreferencesandknowledgeofhowdevicesarebeingusedbyapplications.
Devicesthatarenotbeingusedcanbeturnedoff.
Theoperatingsystemusesinformationfromapplicationsandusersettingstoputthesystemasawholeintoalow-powerstate.
Table10liststhepowerstatessupportedbytheboardsalongwiththeassociatedsystempowertargets.
SeetheACPIspecificationforacompletedescriptionofthevarioussystemandpowerstates.
Table10.
PowerStatesandTargetedSystemPowerGlobalStatesSleepingStatesProcessorStatesDeviceStatesTargetedSystemPower(Note1)G0–workingstateS0–workingC0–workingD0–workingstate.
Fullpower>30WG1–sleepingstateS1–ProcessorstoppedC1–stopgrantD1,D2,D3–devicespecificationspecific.
5WkeytoenterBIOS.
2.
UsethearrowkeystogototheAdvancedMenu,selectPeripheralConfiguration,andthenpressthekey.
3.
SelecttheTrustedPlatformModule,press,andselectEnabledandpressagain(displayshouldshow:TrustedPlatformModule[Enabled]).
4.
Pressthekey,selectOkandpress.
5.
SystemshouldrebootandstartMicrosoftWindows.
1.
14.
6AssumingTrustedPlatformModuleOwnershipOncetheTPMhasbeenenabled,ownershipmustbeassumedbyusingtheInfineonSecurityPlatformSoftware.
Theowner/endusershouldfollowthestepslistedbelowtotakeownershipoftheTPM:1.
Startthesystem.
2.
LaunchtheInfineonSecurityPlatformInitializationWizard.
3.
CreateOwnerpassword(beforecreatinganypassword,reviewthePasswordRecommendationsmadeearlierinthisdocument).
4.
CreateanewRecoveryArchive(notethefilenameandlocation).
5.
SpecifyaSecurityPlatformEmergencyRecoveryTokenpasswordandlocation.
(thispasswordshouldnotmatchtheOwnerpasswordoranyotherpassword).
6.
DefinewheretosavetheEmergencyRecoveryToken(notethefilelocationandname).
7.
ThesoftwarewillthencreaterecoveryarchivefilesandfinalizeownershipoftheTPM.
8.
AftercompletingtheInfineonSecurityPlatformInitializationWizard,theEmergencyRecoveryToken(SPEmRecToken.
xml)mustbemovedtoaremovablemedia(floppy,CDR,flashmedia,etc)ifthefilewasnotsavedtoaremovablemediaduringinstallation.
Oncethisisdone,theremovablemediashouldbestoredinasecurelocation.
NocopiesofthisEmergencyRecoveryTokenfileshouldremainonthesystem.
Ifacopyremainsonthesystem,itcouldbeusedtocompromisethesecurityoftheplatform.
9.
LaunchtheInfineonSecurityPlatformUserInitializationWizard.
10.
CreateaBasicUserpassword(thispasswordisthemostfrequentlyusedandshouldnotmatchanyotherpassword).
11.
SelectandconfigureSecurityPlatformfeaturesforthisuser.
12.
AftercompletingtheInfineonSecurityPlatformUserInitializationWizard,acopyoftheEmergencyRecoveryArchive(SPEmRecArchive.
xml)shouldbecopiedtoaremovablemediaandstoredinasecurelocation.
Thisprocedureshouldberepeatedafteranypasswordchangesortheadditionofnewusers.
13.
Restartthesystem.
14.
TobackupthekeysfortheEMBASSYTrustSuite,theKeyTransferManagersoftwaremustbeconfigured.
LaunchtheKeyTransferManagerfromtheprogrammenu.
15.
Followtheinstructionsandcreateanddocumentthelocationsforboththearchiveandrestorationkeyfiles.
Thekeyarchiveshouldbelocatedonaremovablemediaandstoredinasecurelocationwhennotinuse.
16.
Createanddocumentthepasswordtoprotectthekeyarchive.
17.
ProvidetheTPMOwnerpasswordtoallowtheKeyTransferManagertocreatethearchiveandrestorationkeyfiles.
49IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification18.
UponcompletingtheconfigurationoftheKeyTransferManager,itwillplaceaniconinthetaskbarandautomaticallybackupallnewandupdatedkeysassociatedwiththeEMBASSYTrustSuite.
Iftheremovablemediathatcontainsthearchivefileisnotpresentwhenanewkeyisgenerated,thenkeyswillhavetobemanuallybackedupusingtheKeyTransferManagerwhentheremovablemediaisavailable.
19.
AllpasswordsassociatedwiththeInfineonSecurityPlatformSoftware(Owner,EmergencyRecoveryToken,andUserpasswords)andWaveSystemsEMBASSYTrustSuiteandKeyTransferManagerarenotrecoverableandcannotberesetwithouttheoriginaltext.
Thesepasswordsshouldbedocumentedandstoredinasecuredlocation(vault,safedepositbox,off-sitestorage,etc.
)incasetheyareneededinthefuture.
Thesedocumentsandfilesshouldbeupdatedafteranypasswordchanges.
1.
14.
7RecoveryProcedures1.
14.
7.
1RecoveringfromHardDiskFailureRestorethelatestharddriveimagefrombackuptothenewharddrive–noTPMspecificrecoveryisnecessary.
1.
14.
7.
2RecoveringfromDesktopBoardorTPMFailureThisproceduremayrestorethemigratablekeysfromtheEmergencyRecoveryArchive,anddoesnotrestoreanypreviouskeysorcontenttotheTPM.
ThisrecoveryproceduremayrestoreaccesstotheInfineonSecurityPlatformsoftwareandWaveSystemsEMBASSYTrustSuitethataresecuredwithmigratablekeys.
Requirements:EmergencyRecoveryArchive(createdwiththeInfineonSecurityPlatformInitiationWizard)EmergencyRecoveryToken(createdwiththeInfineonSecurityPlatformInitiationWizard)EmergencyRecoveryTokenSecurityPassword(createdwiththeInfineonSecurityPlatformInitiationWizard)Workingoriginaloperatingsystem(OS)installation,orarestoredimageoftheharddriveWaveSystemsKeyTransferManagerarchivepasswordTPMOwnershippasswordThisrecoveryprocedureonlyrestoresthemigratablekeysfromthepreviouslycreatedRecoveryArchives.
1.
Replacethedesktopboardwiththesamemodelasthefailedboard.
2.
Starttheoriginaloperatingsystemorrestoretheoriginalharddriveimage.
3.
StarttheInfineonSecurityPlatformInitializationWizardandcheckthe"IwanttorestoretheexistingSecurityPlatform"box.
4.
FollowtheinstructionsduringtheSecurityPlatformInitialization,andappendtheEmergencyRecoveryArchivetotheexistingarchive.
5.
Provideallthenecessarypasswords,files,andfilelocationsasrequested.
Itmaytakeupto20minutesforSecurityPlatformInitializationWizardtorestorethesecurityplatformsettings.
6.
StartUserInitializationWizard.
Select"RecoverYourBasicUserKey"whenprompted.
SpecifytheoriginalBasicUserKeypasswordandproceedwiththewizard.
50ProductDescription7.
Whenre-configuringthePersonalSecureDrive,select"IwanttochangemyPersonalSecureDrivesetting",confirmthedriveletterandnamearecorrect,andthenproceedthroughtherestofthewizard.
8.
Restartthesystemwhenrequested.
9.
TorestoreaccesstotheEMBASSYTrustSuite,rightmouseclickontheKeyTransferManagericonlocatedinthetaskbarinthelowerrightcornerofthescreen,andselectRestoreTPMKeys.
10.
Provideallthenecessarypasswords,files,andfilelocationsasrequestedbytheKeyTransferManager.
11.
Uponsuccessfulcompletionofallsteps,youshouldbeabletoaccesspreviouslyencryptedfiles.
1.
14.
8ClearingTrustedPlatformModuleOwnershipWARNINGDisconnectthedesktopboard'spowersupplyfromitsACpowersourcebeforeyouconnectordisconnectcables,orinstallorremoveanyboardcomponents.
Failuretodothiscanresultinpersonalinjuryorequipmentdamage.
Somecircuitryonthedesktopboardcancontinuetooperateeventhoughthefrontpanelpowerswitchisoff.
CAUTIONDATAENCRYPTEDBYANYPROGRAMUTILIZINGTHETPMWILLBECOMEINACCESSIBLEIFTPMOWNERSHIPISCLEARED.
Recoveryproceduresmayallowthemigratablekeystoberecoveredandmightrestoreaccesstoencrypteddata.
(ReviewtheRecoveryProceduresfordetailedinstructions).
TheTPMmaybeclearedtotransferownershipoftheplatformtoanewowner.
1.
ObserveprecautionsintheaboveWARNINGthenopenthesystemcase.
2.
Movetheconfigurationjumperontheboardtopins2-3.
3.
RestorepowertothePCandpoweron.
4.
SystemshouldautomaticallyenterBIOSsetup.
5.
UsethearrowkeystoselectClearTrustedPlatformModule,press.
6.
IfyouagreetothewarningmessageselectOkandpress.
7.
Pressthekeytosaveandexit,selectOkandpress.
8.
Poweroffthesystem.
9.
ReviewprecautionsintheWARNINGabove.
10.
Restoretheconfigurationjumperontheboardtopins1-2.
Whencleared,theTPMmoduleisdisabledbydefault.
1.
14.
9SoftwareSupportForassistancewiththeInfineonSecurityPlatformSoftware,visitthewebat:http://www.
infineon.
comForassistancewiththeWaveSystemEMBASSYTrustSuite,visitthewebat:51IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationhttp://www.
wave.
com/support/ets.
htmlForadditionalinformationaboutTPMandenhancingPCsecurity,visit:https://www.
trustedcomputinggroup.
org/home522TechnicalReferenceWhatThisChapterContains2.
1Introduction532.
2MemoryResources.
532.
3DMAChannels.
552.
4FixedI/OMap.
562.
5PCIConfigurationSpaceMap.
572.
6Interrupts.
582.
7PCIConventionalInterruptRoutingMap592.
8Connectors.
612.
9JumperBlock752.
10MechanicalConsiderations.
762.
11ElectricalConsiderations.
792.
12ThermalConsiderations.
812.
13Reliability.
832.
14Environmental842.
15RegulatoryCompliance.
852.
1IntroductionSections2.
2-2.
6containseveralstandalonetables.
Table12describesthesystemmemorymap,Table13liststheDMAchannels,Table14showstheI/Omap,Table15definesthePCIConventionalbusconfigurationspacemap,andTable16describestheinterrupts.
Theremainingsectionsinthischapterareintroducedbytextfoundwiththeirrespectivesectionheadings.
2.
2MemoryResources2.
2.
1AddressableMemoryTheboardutilizes4GBofaddressablesystemmemory.
TypicallytheaddressspacethatisallocatedforPCIConventionalbusadd-incards,PCIExpressconfigurationspace,BIOS(firmwarehub),andchipsetoverheadresidesabovethetopofDRAM(totalsystemmemory).
Onasystemthathas4GBofsystemmemoryinstalled,itisnotpossibletousealloftheinstalledmemoryduetosystemaddressspacebeingallocatedforothersystemcriticalfunctions.
Thesefunctionsincludethefollowing:BIOS/firmwarehub(2MB)LocalAPIC(19MB)DigitalMediaInterface(40MB)Frontsidebusinterrupts(17MB)PCIExpressconfigurationspace(256MB)MCHbaseaddressregisters,internalgraphicsranges,PCIExpressports(upto512MB)Memory-mappedI/OthatisdynamicallyallocatedforPCIConventionalandPCIExpressadd-incards53IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationTheamountofinstalledmemorythatcanbeusedwillvarybasedonadd-incardsandBIOSsettings.
Figure16showsaschematicofthesystemmemorymap.
Allinstalledsystemmemorycanbeusedwhenthereisnooverlapofsystemaddresses.
UpperBIOSarea(64KB)LowerBIOSarea(64KB;16KBx4)Add-inCardBIOSandBufferarea(128KB;16KBx8)StandardPCI/ISAVideoMemory(SMMMemory)128KBDOSarea(640KB)1MB960KB896KB768KB640KB0KB0FFFFFH0F0000H0EFFFFH0E0000H0DFFFFH0C0000H0BFFFFH0A0000H09FFFFH00000HFLASHAPICReserved0MB640KB1MBTopofusableDRAM(memoryvisibletotheoperatingsystem)PCIMemoryRange-containsPCI,chipsets,DirectMediaInterface(DMI),andICHranges(approximately750MB)DOSCompatibilityMemoryDRAMRangeOM17140~20MB4GBTopofSystemAddressSpaceFigure16.
DetailedSystemMemoryAddressMap54TechnicalReference2.
2.
2MemoryMapTable12liststhesystemmemorymap.
Table12.
SystemMemoryMapAddressRange(decimal)AddressRange(hex)SizeDescription1024K-4194304K100000-FFFFFFFF4095MBExtendedmemory960K-1024KF0000-FFFFF64KBRuntimeBIOS896K-960KE0000-EFFFF64KBReserved800K-896KC8000-DFFFF96KBPotentialavailablehighDOSmemory(opentothePCIConventionalbus).
Dependentonvideoadapterused.
640K-800KA0000-C7FFF160KBVideomemoryandBIOS639K-640K9FC00-9FFFF1KBExtendedBIOSdata(movablebymemorymanagersoftware)512K-639K80000-9FBFF127KBExtendedconventionalmemory0K-512K00000-7FFFF512KBConventionalmemory2.
3DMAChannelsTable13.
DMAChannelsDMAChannelNumberDataWidthSystemResource08or16bitsOpen18or16bitsParallelport28or16bitsDiskettedrive38or16bitsParallelport(forECPorEPP)48or16bitsDMAcontroller516bitsOpen616bitsOpen716bitsOpen55IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
4FixedI/OMapTable14.
I/OMapAddress(hex)SizeDescription0000-00FF256bytesUsedbytheDesktopBoardD915GAV/D915GAG.
RefertotheICH6datasheetfordynamicaddressinginformation.
0170-01778bytesSecondaryParallelATAIDEchannelcommandblock01F0-01F78bytesPrimaryParallelATAIDEchannelcommandblock0228-022F(Note1)8bytesLPT30278-027F(Note1)8bytesLPT202E8-02EF(Note1)8bytesCOM402F8-02FF(Note1)8bytesCOM20374-03774bytesSecondaryParallelATAIDEchannelcontrolblock0377,bits6:07bitsSecondaryIDEchannelstatusport0378-037F8bytesLPT103E8-03EF8bytesCOM303F0-03F56bytesDiskettechannel03F4–03F71bytePrimaryParallelATAIDEchannelcontrolblock03F8-03FF8bytesCOM104D0-04D12bytesEdge/leveltriggeredPICLPTn+4008bytesECPport,LPTnbaseaddress+400h0CF8-0CFB(Note2)4bytesPCIConventionalbusconfigurationaddressregister0CF9(Note3)1byteResetcontrolregister0CFC-0CFF4bytesPCIConventionalbusconfigurationdataregisterFFA0-FFA78bytesPrimaryParallelATAIDEbusmasterregistersFFA8-FFAF8bytesSecondaryParallelATAIDEbusmasterregistersNotes:1.
Default,butcanbechangedtoanotheraddressrange2.
Dwordaccessonly3.
ByteaccessonlyNOTESomeadditionalI/OaddressesarenotavailableduetoICH6addressaliassing.
TheICH6datasheetprovidesmoreinformationonaddressaliassing.
ForinformationaboutRefertoObtainingtheICH6datasheetSection1.
4,page1956TechnicalReference2.
5PCIConfigurationSpaceMapTable15.
PCIConfigurationSpaceMapBusNumber(hex)DeviceNumber(hex)FunctionNumber(hex)Description000000MemorycontrollerofIntel82915Gcomponent000100PCIExpressx16graphicsport(Note1)000200Integratedgraphicscontroller000201Integratedgraphicscontroller001B00IntelHighDefinitionAudioController001C00PCIExpressport1(PCIExpressx1busconnector1)001C01PCIExpressport2001C02PCIExpressport3(PCIExpressx1busconnector2)(Note2)001C03PCIExpressport4(notused)001D00USBUHCIcontroller1001D01USBUHCIcontroller2001D02USBUHCIcontroller3001D03USBUHCIcontroller4001D07EHCIcontroller001E00PCIbridge001F00PCIcontroller001F01ParallelATAIDEcontroller001F02SerialATAcontroller001F03SMBuscontroller(Note3)0000PCIConventionalbusconnector1(Note3)0100PCIConventionalbusconnector2(Note3)0200PCIConventionalbusconnector3(Note2)(Note3)0300PCIConventionalbusconnector4(Note2)(Note3)0800Intel82562EZ10/100Mbits/secLANPLCNotes:1.
PresentonlywhenaPCIExpressx16graphicscardisinstalled.
2.
NotpresentontheD915GAGboard.
3.
Busnumberisdynamicandcanchangebasedonadd-incardsused.
57IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
6InterruptsTheinterruptscanberoutedthrougheithertheProgrammableInterruptController(PIC)ortheAdvancedProgrammableInterruptController(APIC)portionoftheICH6component.
ThePICissupportedinWindows98SEandWindowsMEandusesthefirst16interrupts.
TheAPICissupportedinWindows2000andWindowsXPandsupportsatotalof24interrupts.
Table16.
InterruptsIRQSystemResourceNMII/Ochannelcheck0Reserved,intervaltimer1Reserved,keyboardbufferfull2Reserved,cascadeinterruptfromslavePIC3COM2(Note1)4COM1(Note1)5LPT2(PlugandPlayoption)/Useravailable6Diskettedrive7LPT1(Note1)8Real-timeclock9Useravailable10Useravailable11Useravailable12Onboardmouseport(ifpresent,elseuseravailable)13Reserved,mathcoprocessor14PrimaryIDE/SerialATA(ifpresent,elseuseravailable)15SecondaryIDE/SerialATA(ifpresent,elseuseravailable)16(Note2)Useravailable(throughPIRQA)17(Note2)Useravailable(throughPIRQB)18(Note2)Useravailable(throughPIRQC)19(Note2)Useravailable(throughPIRQD)20(Note2)Useravailable(throughPIRQE)21(Note2)Useravailable(throughPIRQF)22(Note2)Useravailable(throughPIRQG)23(Note2)Useravailable(throughPIRQH)Notes:1.
Default,butcanbechangedtoanotherIRQ.
2.
AvailableinAPICmodeonly.
58TechnicalReference2.
7PCIConventionalInterruptRoutingMapThissectiondescribesinterruptsharingandhowtheinterruptsignalsareconnectedbetweenthePCIConventionalbusconnectorsandonboardPCIConventionaldevices.
ThePCIConventionalspecificationdescribeshowinterruptscanbesharedbetweendevicesattachedtothePCIConventionalbus.
Inmostcases,thesmallamountoflatencyaddedbyinterruptsharingdoesnotaffecttheoperationorthroughputofthedevices.
Insomespecialcaseswheremaximumperformanceisneededfromadevice,aPCIConventionaldeviceshouldnotshareaninterruptwithotherPCIConventionaldevices.
UsethefollowinginformationtoavoidsharinganinterruptwithaPCIConventionaladd-incard.
PCIConventionaldevicesarecategorizedasfollowstospecifytheirinterruptgrouping:INTA:Bydefault,alladd-incardsthatrequireonlyoneinterruptareinthiscategory.
Foralmostallcardsthatrequiremorethanoneinterrupt,thefirstinterruptonthecardisalsoclassifiedasINTA.
INTB:Generally,thesecondinterruptonadd-incardsthatrequiretwoormoreinterruptsisclassifiedasINTB.
(Thisisnotanabsoluterequirement.
)INTCandINTD:Generally,athirdinterruptonadd-incardsisclassifiedasINTCandafourthinterruptisclassifiedasINTD.
TheICH6haseightProgrammableInterruptRequest(PIRQ)inputsignals.
AllPCIConventionalinterruptsourceseitheronboardorfromaPCIConventionaladd-incardconnecttooneofthesePIRQsignals.
SomePCIConventionalinterruptsourcesareelectricallytiedtogetherontheboardandthereforesharethesameinterrupt.
Table17showsanexampleofhowthePIRQsignalsarerouted.
Forexample,usingTable17asareference,assumeanadd-incardusingINTAispluggedintoPCIConventionalbusconnector3.
InPCIbusconnector3,INTAisconnectedtoPIRQB,whichisalreadyconnectedtotheICH6audiocontroller.
Theadd-incardinPCIConventionalbusconnector3nowsharesaninterruptwiththeonboardinterruptsource.
59IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationTable17.
PCIInterruptRoutingMapICH6PIRQSignalNamePCIInterruptSourcePIRQAPIRQBPIRQCPIRQDPIRQEPIRQFPIRQGPIRQHICH6LANINTAPCIbusconnector1INTDINTAINTBINTCPCIbusconnector2INTCINTBINTAINTDPCIbusconnector3(Note)INTDINTCINTAINTBPCIbusconnector4(Note)INTBINTAINTCINTDNote:NotpresentontheD915GAGboard.
NOTEInPICmode,theICH6canconnecteachPIRQlineinternallytooneoftheIRQsignals(3,4,5,6,7,9,10,11,12,14,and15).
Typically,adevicethatdoesnotshareaPIRQlinewillhaveauniqueinterrupt.
However,incertaininterrupt-constrainedsituations,itispossiblefortwoormoreofthePIRQlinestobeconnectedtothesameIRQsignal.
RefertoTable16fortheallocationofPIRQlinestoIRQsignalsinAPICmode.
PCIinterruptassignmentstotheUSBports,SerialATAports,andPCIExpressportsaredynamic.
60TechnicalReference2.
8ConnectorsCAUTIONOnlythefollowingconnectorshaveovercurrentprotection:backpanelUSB,frontpanelUSB,andPS/2.
Theotherinternalconnectorsarenotovercurrentprotectedandshouldconnectonlytodevicesinsidethecomputer'schassis,suchasfansandinternalperipherals.
Donotusetheseconnectorstopowerdevicesexternaltothecomputer'schassis.
Afaultintheloadpresentedbytheexternaldevicescouldcausedamagetothecomputer,thepowercable,andtheexternaldevicesthemselves.
Thissectiondescribestheboard'sconnectors.
Theconnectorscanbedividedintothesegroups:BackpanelI/Oconnectors(seepage62)Component-sideI/Oconnectors(seepage64)61IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
8.
1BackPanelConnectorsFigure17showsthelocationofthebackpanelconnectors.
Thebackpanelconnectorsarecolor-coded.
Thefigurelegend(Table18)liststhecolorsused(whenapplicable).
OM16670ABKFCLIJGDEHFigure17.
BackPanelConnectorsTable18liststhebackpanelconnectorsidentifiedinFigure17.
NOTEThebackpanelaudiolineoutconnectorisdesignedtopowerheadphonesoramplifiedspeakersonly.
Pooraudioqualityoccursifpassive(non-amplified)speakersareconnectedtothisoutput.
62TechnicalReferenceTable18.
BackPanelConnectorsShowninFigure17.
Item/calloutfromFigure17DescriptionAPS/2mouseport(Green)BPS/2keyboardport(Purple)CParallelport(Burgundy)DSerialportA(Teal)EVGAportFAudiolinein/RetaskingPortC(Lightblue)GAudiolineout/RetaskingPortD(LimeGreen)HMicin/RetaskingPortB(Pink)IIEEE-1394a(optional)JUSBports(two)KLANLUSBports(two)63IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
8.
2Component-sideConnectorsFigure18showsthelocationsofthecomponent-sideconnectorsontheD915GAVboard.
OM16671BACEFGDTSRUVWXYZAABBEEGGFFDDCCHIKJLMNOP1311141134431291031412912394023242123334112101210121011221101391311111Q1Figure18.
D915GAVBoardComponent-sideConnectors64TechnicalReferenceTable19liststhecomponent-sideconnectorsidentifiedinFigure18.
Table19.
Component-sideConnectorsShowninFigure18.
Item/calloutfromFigure18DescriptionAPCIConventionalbusadd-incardconnector4BRearchassisfanconnector2CPCIConventionalbusadd-incardconnector3DPCIExpressx1busadd-incardconnector2EATAPICD-ROMconnector(optional)FPCIExpressx1busadd-incardconnector1GS/PDIFconnector(optional)HFrontpanelaudioconnectorIPCIConventionalbusadd-incardconnector2JFrontpanelIEEE-1394aconnector(optional)KPCIConventionalbusadd-incardconnector1LFrontpanelIEEE-1394aconnector(optional)MPCIExpressx16busadd-incardconnectorNRearchassisfanconnector1OAlternatepowerconnectorP+12Vpowerconnector(ATX12V)QSCSILED(optional)RSerialportB(optional)SProcessorfanconnectorTPowerconnectorUDiskettedriveconnectorVParallelATAIDEconnectorWChassisintrusionconnectorXFrontchassisfanconnectorYSerialATAconnector1ZSerialATAconnector3AASerialATAconnector2BBSerialATAconnector0CCAuxiliaryfrontpanelpowerLEDconnectorDDFrontpanelconnectorEEATXfanconnector(optional)FFFrontpanelUSBconnectorGGFrontpanelUSBconnector65IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationFigure19showsthelocationsofthecomponent-sideconnectorsontheD915GAGboard.
OM16661AMNOPQRSTUVBCEDFGHI1114113443129103141239402324212333411210121012101BBAAZYXWJ111112211091311291KLFigure19.
D915GAGBoardComponent-sideConnectors66TechnicalReferenceTable20liststhecomponent-sideconnectorsidentifiedinFigure19.
Table20.
Component-sideConnectorsShowninFigure19.
Item/calloutfromFigure19DescriptionAS/PDIFconnector(optional)BFrontpanelaudioconnectorCPCIConventionalbusadd-incardconnector2DFrontpanelIEEE-1394aconnector(optional)EPCIConventionalbusadd-incardconnector1FPCIExpressx16busadd-incardconnectorGRearchassisfanconnectorHAlternatepowerconnectorI+12Vpowerconnector(ATX12V)JProcessorfanconnectorKSerialportB(optional)LSCSILED(optional)MPowerconnectorNDiskettedriveconnectorOParallelATAIDEconnectorPChassisintrusionconnectorQFrontchassisfanconnectorRSerialATAconnector1SSerialATAconnector3TSerialATAconnector2USerialATAconnector0VAuxiliaryfrontpanelpowerLEDconnectorWFrontpanelconnectorXFrontpanelUSBconnectorYFrontpanelUSBconnectorZFrontpanelIEEE-1394aconnector(optional)AAPCIExpressx1busadd-incardconnector1BBATAPICD-ROMconnector(optional)67IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationTable21.
S/PDIFConnector(Optional)PinSignalName1+5V2S/PDIFOutput3GroundTable22.
ATAPICD-ROMConnector(Optional)PinSignalName1LeftaudioinputfromCD-ROM2CDaudiodifferentialground3CDaudiodifferentialground4RightaudioinputfromCD-ROMTable23.
FrontPanelAudioConnectorPinSignalNamePinSignalName1PortE[Port1]LeftChannel2Ground3PortE[Port1]RightChannel4Presence#(donglepresent)5PortF[Port2]RightChannel6PortE[Port1]Sensereturn(jackdetection)7PortE[Port1]andPortF[Port2]Sensesend(jackdetection)8Key9PortF[Port2]LeftChannel10PortF[Port2]Sensereturn(jackdetection)#INTEGRATOR'SNOTEThefrontpanelaudioconnectoriscoloredyellow.
Table24.
SerialPortBConnector(optional)PinSignalNamePinSignalName1DCD2RXD3TXD4DTR5Ground6DSR7RTS8CTS9RI10NotconnectedTable25.
ChassisIntrusionConnectorPinSignalName1Intruder2Ground68TechnicalReferenceTable26.
SCSIHardDriveActivityLEDConnector(Optional)PinSignalName1SCSI_ACT#2NoconnectTable27.
SerialATAConnectorsPinSignalName1Ground2TXP3TXN4Ground5RXN6RXP7GroundTable28.
ProcessorFanConnectorPinSignalName1Ground2+12V3FAN_TACH4FAN_CONTROL2.
8.
2.
1ChassisFanConnectorsTheD915GAVboardhasthreestandardandoneoptionalchassisfanconnectors:FrontchassisfanRearchassisfan1Rearchassisfan2ATXfanconnector(optional)TheD915GAGboardhastwochassisfanconnectors:FrontchassisfanRearchassisfanTable29liststhesignalnamesforthechassisfanconnectors.
Thesesignalnamesapplytoallchassisfanconnectorsforbothboards.
Table29.
ChassisFanConnectorsPinSignalName1Control2+12V3Tach69IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
8.
2.
2PowerSupplyConnectorsTheboardhasthreepowersupplyconnectors:Mainpower–a2x12connector.
Thisconnectoriscompatiblewith2x10connectorspreviouslyusedonIntelDesktopboards.
TheboardsupportstheuseofATX12Vpowersupplieswitheither2x10or2x12mainpowercables.
Whenusingapowersupplywitha2x10mainpowercable,attachthatcableontherightmostpinsofthemainpowerconnector,leavingpins11,12,23,and24unconnected.
ATX12Vpower–a2x2connector.
Thisconnectorprovidespowerdirectlytotheprocessorvoltageregulatorandmustalwaysbeused.
Failuretodosowillpreventtheboardfrombooting.
Alternatepower–a1x4connector.
ThisconnectorprovidesadditionalpowerwhenusinghighwattagePCIExpressx16graphicscards.
#INTEGRATOR'SNOTEWhenusinghighwattagePCIExpressx16graphicscards,useoneofthefollowingpowersupplyconfigurationstoavoidsysteminstability:Thepreferredmethodofpowerdeliveryistouseapowersupplywitha2x12mainpowercable.
Inthisconfiguration,usetwoconnectorstoprovidepowertotheboard:ThemainpowerconnectorTheATX12VconnectorInthisconfiguration,thealternatepowerconnectorisnotrequired.
The2x12mainpowercablecanprovideupto144Wofpowerfromthe+12Vrail.
.
Analternatemethodofpowerdeliveryistouseapowersupplyhasa2x10mainpowercable.
Inthisconfiguration,usethreeconnectorstoprovidepowertotheboard:ThemainpowerconnectorTheATX12VconnectorThealternatepowerconnectorTable30.
MainPowerConnectorPinSignalNamePinSignalName1+3.
3V13+3.
3V2+3.
3V14-12V3Ground15Ground4+5V16PS-ON#(powersupplyremoteon/off)5Ground17Ground6+5V18Ground7Ground19Ground8PWRGD(PowerGood)20Noconnect9+5V(Standby)21+5V10+12V22+5V11+12V(Note)23+5V(Note)122x12connectordetect(Note)24Ground(Note)70TechnicalReferenceNote:Whenusinga2x10powersupplycable,thispinwillbeunconnected.
Table31.
ATX12VPowerConnectorPinSignalNamePinSignalName1Ground2Ground3+12V4+12VTable32.
AlternatePowerConnectorPinSignalName1+12V2Ground3Ground4+5V2.
8.
2.
3Add-inCardConnectorsTheboardhasthefollowingadd-incardconnectors:PCIExpressx16:oneconnectorsupportingsimultaneoustransferspeedsupto8GBytes/sec.
PCIExpressx1:theD915GAVboardhastwoPCIExpressx1connectors;theD915GAGboardhasonePCIExpressx1connector.
Thex1interfacessupportsimultaneoustransferspeedsupto500MBytes/sec.
PCIConventional(rev2.
2compliant)bus:theD915GAVboardhasfourPCIConventionalbusadd-incardconnectors;theD915GAGboardhastwoPCIConventionaladd-incardconnectors.
TheSMBusisroutedtoPCIConventionalbusconnector2only(ATXexpansionslot6).
PCIConventionalbusadd-incardswithSMBussupportcanaccesssensordataandotherinformationresidingontheDesktopBoard.
NotethefollowingconsiderationsforthePCIConventionalbusconnectors:AllofthePCIConventionalbusconnectorsarebusmastercapable.
SMBussignalsareroutedtoPCIConventionalbusconnector2.
ThisenablesPCIConventionalbusadd-inboardswithSMBussupporttoaccesssensordataontheboards.
ThespecificSMBussignalsareasfollows:TheSMBusclocklineisconnectedtopinA40.
TheSMBusdatalineisconnectedtopinA41.
NOTEThePCIExpressx16connectorisconfiguredtosupportonlyaPCIExpressx1linkwhentheIntelGMA900graphicscontrollerisenabled.
71IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
8.
2.
4AuxiliaryFrontPanelPower/SleepLEDConnectorPins1and3ofthisconnectorduplicatethesignalsonpins2and4ofthefrontpanelconnector.
Table33.
AuxiliaryFrontPanelPower/SleepLEDConnectorPinSignalNameIn/OutDescription1HDR_BLNK_GRNOutFrontpanelgreenLED2Notconnected3HDR_BLNK_YELOutFrontpanelyellowLED2.
8.
2.
5FrontPanelConnectorThissectiondescribesthefunctionsofthefrontpanelconnector.
Table34liststhesignalnamesofthefrontpanelconnector.
Figure20isaconnectiondiagramforthefrontpanelconnector.
Table34.
FrontPanelConnectorPinSignalIn/OutDescriptionPinSignalIn/OutDescriptionHardDriveActivityLED[Yellow]PowerLED[Green]1HD_PWROutHarddiskLEDpull-up(750)to+5V2HDR_BLNK_GRNOutFrontpanelgreenLED3HAD#OutHarddiskactiveLED4HDR_BLNK_YELOutFrontpanelyellowLEDResetSwitch[Purple]On/OffSwitch[Red]5GroundGround6FPBUT_INInPowerswitch7FP_RESET#InResetswitch8GroundGroundPowerNotConnected9+5VPower10N/CNotconnectedPurpleOM17000HardDriveActivityLEDResetSwitch+5VDCN/CPowerSwitch864297531+Single-coloredPowerLED+Dual-coloredPowerLED+YellowGreenRedFigure20.
ConnectionDiagramforFrontPanelConnector72TechnicalReference2.
8.
2.
5.
1HardDriveActivityLEDConnector[Yellow]Pins1and3[Yellow]canbeconnectedtoanLEDtoprovideavisualindicatorthatdataisbeingreadfromorwrittentoaharddrive.
ProperLEDfunctionrequiresoneofthefollowing:ASerialATAharddriveconnectedtoanonboardSerialATAconnectorAnIDEharddriveconnectedtoanonboardIDEconnector2.
8.
2.
5.
2ResetSwitchConnector[Purple]Pins5and7[Purple]canbeconnectedtoamomentarysinglepole,singlethrow(SPST)typeswitchthatisnormallyopen.
Whentheswitchisclosed,theboardresetsandrunsthePOST.
2.
8.
2.
5.
3Power/SleepLEDConnector[Green]Pins2and4[Green]canbeconnectedtoaone-ortwo-colorLED.
Table35showsthepossiblestatesforaone-colorLED.
Table36showsthepossiblestatesforatwo-colorLED.
Table35.
StatesforaOne-ColorPowerLEDLEDStateDescriptionOffPoweroff/sleepingSteadyGreenRunningTable36.
StatesforaTwo-ColorPowerLEDLEDStateDescriptionOffPoweroffSteadyGreenRunningSteadyYellowSleepingNOTEThecolorslistedinTable35andTable36aresuggestedcolorsonly.
ActualLEDcolorsareproduct-orcustomer-specific.
2.
8.
2.
5.
4PowerSwitchConnector[Red]Pins6and8[Red]canbeconnectedtoafrontpanelmomentary-contactpowerswitch.
TheswitchmustpulltheSW_ON#pintogroundforatleast50mstosignalthepowersupplytoswitchonoroff.
(Thetimerequirementisduetointernaldebouncecircuitryontheboard.
)Atleasttwosecondsmustpassbeforethepowersupplywillrecognizeanotheron/offsignal.
73IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
8.
2.
6FrontPanelUSBConnectorsFigure21isaconnectiondiagramforthefrontpanelUSBconnectors.
#INTEGRATOR'SNOTESThe+5VDCpowerontheUSBconnectorisfused.
Pins1,3,5,and7compriseoneUSBport.
Pins2,4,6,and8compriseoneUSBport.
UseonlyafrontpanelUSBconnectorthatconformstotheUSB2.
0specificationforhigh-speedUSBdevices.
OM1596386427531Key(nopin)NoConnect10Power(+5VDC)DD+GroundD+GroundDPower(+5VDC)OneUSBPortOneUSBPortFigure21.
ConnectionDiagramforFrontPanelUSBConnectors2.
8.
2.
7FrontPanelIEEE1394aConnectors(Optional)Figure22isaconnectiondiagramfortheoptionalIEEE1394aconnectors.
OM1610786427531Key(nopin)10TPA++12VDCTPAGroundTPB+TPBGroundGround+12VDCFigure22.
ConnectionDiagramforIEEE1394aConnectors#INTEGRATOR'SNOTESTheIEEE1394aconnectorsarecoloredblue.
The+12VDCpowerontheIEEE1394aconnectorsisfused.
EachIEEE1394aconnectorprovidesoneIEEE1394aport.
74TechnicalReference2.
9JumperBlockCAUTIONDonotmovethejumperwiththepoweron.
Alwaysturnoffthepowerandunplugthepowercordfromthecomputerbeforechangingajumpersetting.
Otherwise,theboardcouldbedamaged.
Figure23showsthelocationofthejumperblockontheD915GAVboard.
(ThejumperisinthesamelocationontheD915GAGboard.
)ThejumperblockdeterminestheBIOSSetupprogram'smode.
Table37describesthejumpersettingsforthethreemodes:normal,configure,andrecovery.
Whenthejumperissettoconfiguremodeandthecomputerispowered-up,theBIOScomparestheprocessorversionandthemicrocodeversionintheBIOSandreportsifthetwomatch.
OM1667231J8J4Figure23.
LocationoftheJumperBlockTable37.
BIOSSetupConfigurationJumperSettingsFunction/ModeJumperSettingConfigurationNormal1-213TheBIOSusescurrentconfigurationinformationandpasswordsforbooting.
Configure2-313AfterthePOSTruns,Setuprunsautomatically.
Themaintenancemenuisdisplayed.
RecoveryNone13TheBIOSattemptstorecovertheBIOSconfiguration.
Arecoverydisketteisrequired.
75IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
10MechanicalConsiderations2.
10.
1D915GAVBoardFormFactorTheD915GAVboardisdesignedtofitintoanATX-form-factorchassis.
Figure24illustratesthemechanicalformfactoroftheboard.
Dimensionsaregivenininches[millimeters].
Theouterdimensionsare12.
00inchesby9.
60inches[304.
80millimetersby243.
84millimeters].
LocationoftheI/OconnectorsandmountingholesareincompliancewiththeATXspecification.
OM166746.
100[154.
94]3.
100[78.
74]5.
550[140.
97]6.
450[163.
83]6.
500[165.
10]6.
200[157.
48]5.
200[132.
08]2.
850[72.
39]1.
800[45.
72]0.
002.
600[66.
04]4.
900[124.
46]0.
00Figure24.
D915GAVBoardDimensions76TechnicalReference2.
10.
2D915GAGBoardFormFactorTheD915GAGboardisdesignedtofitintoeitheramicroATXoranATX-form-factorchassis.
Figure25illustratesthemechanicalformfactoroftheboard.
Dimensionsaregivenininches[millimeters].
Theouterdimensionsare9.
60inchesby9.
60inches[243.
84millimetersby243.
84millimeters].
LocationoftheI/OconnectorsandmountingholesareincompliancewiththeATXspecification.
OM166646.
100[154.
94]3.
100[78.
74]3.
150[80.
01]6.
450[163.
83]6.
500[165.
10]6.
200[157.
48]5.
200[132.
08]2.
850[72.
39]1.
800[45.
72]0.
002.
600[66.
04]0.
00Figure25.
D915GAGBoardDimensions77IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
10.
3I/OShieldThebackpanelI/Oshieldfortheboardsmustmeetspecificdimensionandmaterialrequirements.
SystemsbasedontheseboardsneedthebackpanelI/Oshieldtopasscertificationtesting.
Figure26showstheI/Oshield.
Dimensionsaregivenininchestoatoleranceof±0.
02inches.
Thefigurealsoindicatesthepositionofeachcutout.
AdditionaldesignconsiderationsforI/OshieldsrelativetochassisrequirementsaredescribedintheATXspecification.
NOTETheI/Oshielddrawinginthisdocumentisforreferenceonly.
AnI/OshieldcompliantwiththeATXchassisspecification2.
03isavailablefromIntel.
OM17166PictorialView20.
±0.
254TYP[0.
787±0.
10]162.
3REF[6.
390]159.
2±0.
12[6.
268±0.
005]1.
6±0.
12[0.
063±0.
005]1.
55REF[0.
061]12.
00[0.
472]7.
012[0.
276]1.
00[0.
039]0.
00[0.
00]11.
811[0.
465]22.
45[0.
884]9.
44[0.
372]21.
13[0.
832]0.
00[0.
00]27.
876[1.
097]120.
81[4.
756]102.
84[4.
049]142.
12[5.
595]57.
206[2.
252]8xR0.
5MIN11.
81[0.
465]14.
4[0.
567]AAFigure26.
I/OShieldDimensions78TechnicalReference2.
11ElectricalConsiderations2.
11.
1DCLoadingTable38liststheDCloadingcharacteristicsoftheboards.
ThisdataisbasedonaDCanalysisofallactivecomponentswithintheboardthatimpactitspowerdeliverysubsystems.
TheanalysisdoesnotincludePCIadd-incards.
MinimumvaluesassumealightloadplacedontheboardthatissimilartoanenvironmentwithnoapplicationsrunningandnoUSBcurrentdraw.
Maximumvaluesassumealoadplacedontheboardthatissimilartoaheavygamingenvironmentwitha500mAcurrentdrawperUSBport.
Thesecalculationsarenotbasedonspecificprocessorvaluesormemoryconfigurationsbutarebasedontheminimumandmaximumcurrentdrawpossiblefromtheboard'spowerdeliverysubsystemstotheprocessor,memory,andUSBports.
Usethedatasheetsforadd-incards,suchasPCI,todeterminetheoverallsystempowerrequirements.
Theselectionofapowersupplyatthesystemlevelisdependentonthesystem'susagemodelandnotnecessarilytiedtoaparticularprocessorspeed.
Table38.
DCLoadingCharacteristicsDCCurrentat:ModeDCPower+3.
3V+5V+12V-12V+5VSBMinimumloading200.
00W3.
30A10.
00A900A0.
03A0.
80AMaximumloading300.
00W6.
00A14.
00A16.
00A0.
10A1.
40A2.
11.
2Add-inBoardConsiderationsTheboardsaredesignedtoprovide2A(average)of+5Vcurrentforeachadd-inboard.
Thetotal+5Vcurrentdrawforbothboardsisasfollows:AfullyloadedD915GAVboard(allsixexpansionslotsandthePCIExpressx16slotfilled)mustnotexceed14A.
AfullyloadedD915GAGboard(allthreeexpansionslotsandthePCIExpressx16slotfilled)mustnotexceed8A.
79IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
11.
3FanConnectorCurrentCapabilityCAUTIONTheprocessorfanmustbeconnectedtotheprocessorfanconnector,nottoachassisfanconnector.
Connectingtheprocessorfantoachassisfanconnectormayresultinonboardcomponentdamagethatwillhaltfanoperation.
Table39liststhecurrentcapabilityofthefanconnectors.
Table39.
FanConnectorCurrentCapabilityFanConnectorMaximumAvailableCurrentProcessorfan1000mAFrontchassisfan600mARearchassisfan600mARearchassisfan2600mANOTETherearchassisfan2isavailableonlyontheD915GAVboard.
ItisnotavailableontheD915GAGboard.
2.
11.
4PowerSupplyConsiderationsCAUTIONThe+5Vstandbylineforthepowersupplymustbecapableofprovidingadequate+5Vstandbycurrent.
Failuretodosocandamagethepowersupply.
Thetotalamountofstandbycurrentrequireddependsonthewakedevicessupportedandmanufacturingoptions.
SystemintegratorsshouldrefertothepowerusagevalueslistedinTable38whenselectingapowersupplyforusewiththeboard.
Additionalpowerrequiredwilldependonconfigurationschosenbytheintegrator.
ThepowersupplymustcomplywiththefollowingrecommendationsfoundintheindicatedsectionsoftheATXformfactorspecification.
Thepotentialrelationbetween3.
3VDCand+5VDCpowerrails(Section4.
2)Thecurrentcapabilityofthe+5VSBline(Section4.
2.
1.
2)Alltimingparameters(Section4.
2.
1.
3)Allvoltagetolerances(Section4.
2.
2)80TechnicalReference2.
12ThermalConsiderationsCAUTIONAchassiswithamaximuminternalambienttemperatureof38oCattheprocessorfaninletisarequirement.
Useaprocessorheatsinkthatprovidesomni-directionalairflow(asshowninFigure27)tomaintainrequiredairflowacrosstheprocessorvoltageregulatorarea.
OM16996Figure27.
ProcessorHeatsinkforOmni-directionalAirflowCAUTIONFailuretoensureappropriateairflowmayresultinreducedperformanceofboththeprocessorand/orvoltageregulatoror,insomeinstances,damagetotheboard.
ForalistofchassisthathavebeentestedwithInteldesktopboardspleaserefertothefollowingwebsite:http://developer.
intel.
com/design/motherbd/cooling.
htmAllresponsibilityfordeterminingtheadequacyofanythermalorsystemdesignremainssolelywiththereader.
Intelmakesnowarrantiesorrepresentationsthatmerelyfollowingtheinstructionspresentedinthisdocumentwillresultinasystemwithadequatethermalperformance.
CAUTIONEnsurethattheambienttemperaturedoesnotexceedtheboard'smaximumoperatingtemperature.
Failuretodosocouldcausecomponentstoexceedtheirmaximumcasetemperatureandmalfunction.
Forinformationaboutthemaximumoperatingtemperature,seetheenvironmentalspecificationsinSection2.
14.
81IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationCAUTIONEnsurethatproperairflowismaintainedintheprocessorvoltageregulatorcircuit.
Failuretodosomayresultindamagetothevoltageregulatorcircuit.
Theprocessorvoltageregulatorarea(itemAinFigure28)canreachatemperatureofupto85oCinanopenchassis.
Figure28showsthelocationsofthelocalizedhightemperaturezones.
OM16673BACDItemDescriptionAProcessorvoltageregulatorareaBProcessorCIntel82915GGMCHDIntel82801FBICH6Figure28.
LocalizedHighTemperatureZones82TechnicalReferenceTable40providesmaximumcasetemperaturesforthecomponentsthataresensitivetothermalchanges.
Theoperatingtemperature,currentload,oroperatingfrequencycouldaffectcasetemperatures.
Maximumcasetemperaturesareimportantwhenconsideringproperairflowtocooltheboard.
Table40.
ThermalConsiderationsforComponentsComponentMaximumCaseTemperatureIntelPentium4processorForprocessorcasetemperature,seeprocessordatasheetsandprocessorspecificationupdatesIntel82915GGMCH99oC(underbias)Intel82801FBICH6110oC(underbias)ForinformationaboutRefertoIntelPentium4processordatasheetsandspecificationupdatesSection1.
4,page192.
13ReliabilityTheMeanTimeBetweenFailures(MTBF)predictioniscalculatedusingcomponentandsubassemblyrandomfailurerates.
ThecalculationisbasedontheBellcoreReliabilityPredictionProcedure,TR-NWT-000332,Issue4,September1991.
TheMTBFpredictionisusedtoestimaterepairratesandsparepartsrequirements.
TheMTBFdataiscalculatedfrompredicteddataat55C.
TheMTBFfortheD915GAVandD915GAGboardsis102,038hours.
83IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification2.
14EnvironmentalTable41liststheenvironmentalspecificationsfortheboard.
Table41.
EnvironmentalSpecificationsParameterSpecificationTemperatureNon-Operating-40°Cto+70°COperating0°Cto+55°CShockUnpackaged50gtrapezoidalwaveformVelocitychangeof170inches/secondPackagedHalfsine2millisecondProductWeight(pounds)FreeFall(inches)VelocityChange(inches/sec)keyafterthePower-OnSelf-Test(POST)memorytestbeginsandbeforetheoperatingsystembootbegins.
Themenubarisshownbelow.
MaintenanceMainAdvancedSecurityPowerBootExitNOTEThemaintenancemenuisdisplayedonlywhentheDesktopBoardisinconfiguremode.
Section2.
9onpage75showshowtoputtheDesktopBoardinconfiguremode.
89IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationTable45liststheBIOSSetupprogrammenufeatures.
Table45.
BIOSSetupProgramMenuBarMaintenanceMainAdvancedSecurityPowerBootExitClearspasswordsanddisplaysprocessorinformationDisplaysprocessorandmemoryconfigurationConfiguresadvancedfeaturesavailablethroughthechipsetSetspasswordsandsecurityfeaturesConfigurespowermanagementfeaturesandpowersupplycontrolsSelectsbootoptionsSavesordiscardschangestoSetupprogramoptionsTable46liststhefunctionkeysavailableformenuscreens.
Table46.
BIOSSetupProgramFunctionKeysBIOSSetupProgramFunctionKeyDescriptionorSelectsadifferentmenuscreen(Movesthecursorleftorright)orSelectsanitem(Movesthecursorupordown)Selectsafield(Notimplemented)ExecutescommandorselectsthesubmenuLoadthedefaultconfigurationvaluesforthecurrentmenuSavethecurrentvaluesandexitstheBIOSSetupprogramExitsthemenu3.
2BIOSFlashMemoryOrganizationTheFirmwareHub(FWH)includesa4Mbit(512KB)symmetricalflashmemorydevice.
3.
3ResourceConfiguration3.
3.
1PCIAutoconfigurationTheBIOScanautomaticallyconfigurePCIdevices.
PCIdevicesmaybeonboardoradd-incards.
AutoconfigurationletsauserinsertorremovePCIcardswithouthavingtoconfigurethesystem.
WhenauserturnsonthesystemafteraddingaPCIcard,theBIOSautomaticallyconfiguresinterrupts,theI/Ospace,andothersystemresources.
AnyinterruptssettoAvailableinSetupareconsideredtobeavailableforusebytheadd-incard.
3.
3.
2PCIIDESupportIfyouselectAutointheBIOSSetupprogram,theBIOSautomaticallysetsupthePCIIDEconnectorwithindependentI/Ochannelsupport.
TheIDEinterfacesupportsharddrivesuptoATA-66/100andrecognizesanyATAPIcompliantdevices,includingCD-ROMdrives,tapedrives,andUltraDMAdrives.
TheBIOSdeterminesthecapabilitiesofeachdriveandconfiguresthemtooptimizecapacityandperformance.
Totakeadvantageofthehighcapacitiestypicallyavailabletoday,harddrivesareautomaticallyconfiguredforLogicalBlockAddressing(LBA)and90OverviewofBIOSFeaturestoPIOMode3or4,dependingonthecapabilityofthedrive.
Youcanoverridetheauto-configurationoptionsbyspecifyingmanualconfigurationintheBIOSSetupprogram.
TouseATA-66/100featuresthefollowingitemsarerequired:AnATA-66/100peripheraldeviceAnATA-66/100compatiblecableATA-66/100operatingsystemdevicedriversNOTEDonotconnectanATAdeviceasaslaveonthesameIDEcableasanATAPImasterdevice.
Forexample,donotconnectanATAharddriveasaslavetoanATAPICD-ROMdrive.
3.
4SystemManagementBIOS(SMBIOS)SMBIOSisaDesktopManagementInterface(DMI)compliantmethodformanagingcomputersinamanagednetwork.
ThemaincomponentofSMBIOSistheManagementInformationFormat(MIF)database,whichcontainsinformationaboutthecomputingsystemanditscomponents.
UsingSMBIOS,asystemadministratorcanobtainthesystemtypes,capabilities,operationalstatus,andinstallationdatesforsystemcomponents.
TheMIFdatabasedefinesthedataandprovidesthemethodforaccessingthisinformation.
TheBIOSenablesapplicationssuchasthird-partymanagementsoftwaretouseSMBIOS.
TheBIOSstoresandreportsthefollowingSMBIOSinformation:BIOSdata,suchastheBIOSrevisionlevelFixed-systemdata,suchasperipherals,serialnumbers,andassettagsResourcedata,suchasmemorysize,cachesize,andprocessorspeedDynamicdata,suchaseventdetectionanderrorloggingNon-PlugandPlayoperatingsystems,suchasWindowsNT*,requireanadditionalinterfaceforobtainingtheSMBIOSinformation.
TheBIOSsupportsanSMBIOStableinterfaceforsuchoperatingsystems.
Usingthissupport,anSMBIOSservice-levelapplicationrunningonanon-PlugandPlayoperatingsystemcanobtaintheSMBIOSinformation.
3.
5LegacyUSBSupportLegacyUSBsupportenablesUSBdevicestobeusedevenwhentheoperatingsystem'sUSBdriversarenotyetavailable.
LegacyUSBsupportisusedtoaccesstheBIOSSetupprogram,andtoinstallanoperatingsystemthatsupportsUSB.
Bydefault,LegacyUSBsupportissettoEnabled.
LegacyUSBsupportoperatesasfollows:1.
Whenyouapplypowertothecomputer,legacysupportisdisabled.
2.
POSTbegins.
3.
LegacyUSBsupportisenabledbytheBIOSallowingyoutouseaUSBkeyboardtoenterandconfiguretheBIOSSetupprogramandthemaintenancemenu.
4.
POSTcompletes.
91IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification5.
Theoperatingsystemloads.
Whiletheoperatingsystemisloading,USBkeyboardsandmicearerecognizedandmaybeusedtoconfiguretheoperatingsystem.
(KeyboardsandmicearenotrecognizedduringthisperiodifLegacyUSBsupportwassettoDisabledintheBIOSSetupprogram.
)6.
AftertheoperatingsystemloadstheUSBdrivers,alllegacyandnon-legacyUSBdevicesarerecognizedbytheoperatingsystem,andLegacyUSBsupportfromtheBIOSisnolongerused.
ToinstallanoperatingsystemthatsupportsUSB,verifythatLegacyUSBsupportintheBIOSSetupprogramissettoEnabledandfollowtheoperatingsystem'sinstallationinstructions.
3.
6BIOSUpdatesTheBIOScanbeupdatedusingeitherofthefollowingutilities,whichareavailableontheIntelWorldWideWebsite:IntelExpressBIOSUpdateutility,whichenablesautomatedupdatingwhileintheWindowsenvironment.
Usingthisutility,theBIOScanbeupdatedfromafileonaharddisk,a1.
44MBdiskette,oraCD-ROM,orfromthefilelocationontheWeb.
IntelFlashMemoryUpdateUtility,whichrequirescreationofabootdisketteandmanualrebootingofthesystem.
Usingthisutility,theBIOScanbeupdatedfromafileona1.
44MBdiskette(fromalegacydiskettedriveoranLS-120diskettedrive)oraCD-ROM.
BothutilitiesverifythattheupdatedBIOSmatchesthetargetsystemtopreventaccidentallyinstallinganincompatibleBIOS.
NOTEReviewtheinstructionsdistributedwiththeupgradeutilitybeforeattemptingaBIOSupdate.
ForinformationaboutRefertoTheIntelWorldWideWebsiteSection1.
4,page193.
6.
1LanguageSupportTheBIOSSetupprogramandhelpmessagesaresupportedinUSEnglish.
AdditionallanguagesareavailableintheIntegrator'sToolkitutility.
ChecktheIntelwebsitefordetails.
3.
6.
2CustomSplashScreenDuringPOST,anIntelsplashscreenisdisplayedbydefault.
Thissplashscreencanbeaugmentedwithacustomsplashscreen.
TheIntegrator'sToolkitthatisavailablefromIntelcanbeusedtocreateacustomsplashscreen.
NOTEIfyouaddacustomsplashscreen,itwillsharespacewiththeIntelbrandedlogo.
ForinformationaboutRefertoTheIntelWorldWideWebsiteSection1.
4,page1992OverviewofBIOSFeatures3.
7BootOptionsIntheBIOSSetupprogram,theusercanchoosetobootfromadiskettedrive,harddrives,CD-ROM,orthenetwork.
Thedefaultsettingisforthediskettedrivetobethefirstbootdevice,theharddrivesecond,andtheATAPICD-ROMthird.
Thefourthdeviceisdisabled.
3.
7.
1CD-ROMBootBootingfromCD-ROMissupportedincompliancetotheElToritobootableCD-ROMformatspecification.
UndertheBootmenuintheBIOSSetupprogram,ATAPICD-ROMislistedasabootdevice.
Bootdevicesaredefinedinpriorityorder.
Accordingly,ifthereisnotabootableCDintheCD-ROMdrive,thesystemwillattempttobootfromthenextdefineddrive.
3.
7.
2NetworkBootThenetworkcanbeselectedasabootdevice.
ThisselectionallowsbootingfromtheonboardLANoranetworkadd-incardwitharemotebootROMinstalled.
PressingthekeyduringPOSTautomaticallyforcesbootingfromtheLAN.
TousethiskeyduringPOST,theUserAccessLevelintheBIOSSetupprogram'sSecuritymenumustbesettoFull.
3.
7.
3BootingWithoutAttachedDevicesForuseinembeddedapplications,theBIOShasbeendesignedsothatafterpassingthePOST,theoperatingsystemloaderisinvokedevenifthefollowingdevicesarenotpresent:VideoadapterKeyboardMouse3.
7.
4ChangingtheDefaultBootDeviceDuringPOSTPressingthekeyduringPOSTcausesabootdevicemenutobedisplayed.
Thismenudisplaysthelistofavailablebootdevices(assetintheBIOSsetupprogram'sBootDevicePrioritySubmenu).
Table47liststhebootdevicemenuoptions.
Table47.
BootDeviceMenuOptionsBootDeviceMenuFunctionKeysDescriptionorSelectsadefaultbootdeviceExitsthemenu,saveschanges,andbootsfromtheselecteddeviceExitsthemenuwithoutsavingchanges93IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification3.
8FastBootingSystemswithIntelRapidBIOSBootThesefactorsaffectsystembootspeed:SelectingandconfiguringperipheralsproperlyUsinganoptimizedBIOS,suchastheIntelRapidBIOS3.
8.
1PeripheralSelectionandConfigurationThefollowingtechniqueshelpimprovesystembootspeed:Chooseaharddrivewithparameterssuchas"power-uptodataready"lessthaneightseconds,thatminimizeharddrivestartupdelays.
SelectaCD-ROMdrivewithafastinitializationrate.
ThisratecaninfluencePOSTexecutiontime.
Eliminateunnecessaryadd-inadapterfeatures,suchaslogodisplays,screenrepaints,ormodechangesinPOST.
Thesefeaturesmayaddtimetothebootprocess.
Trydifferentmonitors.
SomemonitorsinitializeandcommunicatewiththeBIOSmorequickly,whichenablesthesystemtobootmorequickly.
3.
8.
2IntelRapidBIOSBootUseofthefollowingBIOSSetupprogramsettingsreducesthePOSTexecutiontime.
IntheBootMenu:Settheharddiskdriveasthefirstbootdevice.
Asaresult,thePOSTdoesnotfirstseekadiskettedrive,whichsavesaboutonesecondfromthePOSTexecutiontime.
DisableQuietBoot,whicheliminatesdisplayofthelogosplashscreen.
Thiscouldsaveseveralsecondsofpaintingcomplexgraphicimagesandchangingvideomodes.
EnableIntelRapidBIOSBoot.
Thisfeaturebypassesmemorycountandthesearchforadiskettedrive.
InthePeripheralConfigurationsubmenu,disabletheLANdeviceifitwillnotbeused.
ThiscanreduceuptofoursecondsofoptionROMboottime.
NOTEItispossibletooptimizethebootprocesstothepointwherethesystembootssoquicklythattheIntellogoscreen(oracustomlogosplashscreen)willnotbeseen.
MonitorsandharddiskdriveswithminimuminitializationtimescanalsocontributetoaboottimethatmightbesofastthatnecessarylogoscreensandPOSTmessagescannotbeseen.
Thisboottimemaybesofastthatsomedrivesmightbenotbeinitializedatall.
Ifthisconditionshouldoccur,itispossibletointroduceaprogrammabledelayrangingfromthreeto30seconds(usingtheHardDiskPre-DelayfeatureoftheAdvancedMenuintheDriveConfigurationSubmenuoftheBIOSSetupprogram).
94OverviewofBIOSFeatures3.
9BIOSSecurityFeaturesTheBIOSincludessecurityfeaturesthatrestrictaccesstotheBIOSSetupprogramandwhocanbootthecomputer.
AsupervisorpasswordandauserpasswordcanbesetfortheBIOSSetupprogramandforbootingthecomputer,withthefollowingrestrictions:ThesupervisorpasswordgivesunrestrictedaccesstoviewandchangealltheSetupoptionsintheBIOSSetupprogram.
Thisisthesupervisormode.
TheuserpasswordgivesrestrictedaccesstoviewandchangeSetupoptionsintheBIOSSetupprogram.
Thisistheusermode.
Ifonlythesupervisorpasswordisset,pressingthekeyatthepasswordpromptoftheBIOSSetupprogramallowstheuserrestrictedaccesstoSetup.
Ifboththesupervisoranduserpasswordsareset,userscanentereitherthesupervisorpasswordortheuserpasswordtoaccessSetup.
UsershaveaccesstoSetuprespectivetowhichpasswordisentered.
Settingtheuserpasswordrestrictswhocanbootthecomputer.
Thepasswordpromptwillbedisplayedbeforethecomputerisbooted.
Ifonlythesupervisorpasswordisset,thecomputerbootswithoutaskingforapassword.
Ifbothpasswordsareset,theusercanentereitherpasswordtobootthecomputer.
Forenhancedsecurity,usedifferentpasswordsforthesupervisoranduserpasswords.
ValidpasswordcharactersareA-Z,a-z,and0-9.
Passwordsmaybeupto16charactersinlength.
Table48showstheeffectsofsettingthesupervisorpasswordanduserpassword.
Thistableisforreferenceonlyandisnotdisplayedonthescreen.
Table48.
SupervisorandUserPasswordFunctionsPasswordSetSupervisorModeUserModeSetupOptionsPasswordtoEnterSetupPasswordDuringBootNeitherCanchangealloptions(Note)Canchangealloptions(Note)NoneNoneNoneSupervisoronlyCanchangealloptionsCanchangealimitednumberofoptionsSupervisorPasswordSupervisorNoneUseronlyN/ACanchangealloptionsEnterPasswordClearUserPasswordUserUserSupervisorandusersetCanchangealloptionsCanchangealimitednumberofoptionsSupervisorPasswordEnterPasswordSupervisororuserSupervisororuserNote:Ifnopasswordisset,anyusercanchangeallSetupoptions.
95IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification964ErrorMessagesandBeepCodesWhatThisChapterContains4.
1BIOSErrorMessages974.
2Port80hPOSTCodes994.
3BusInitializationCheckpoints1034.
4Speaker1044.
5BIOSBeepCodes.
1044.
1BIOSErrorMessagesTable49liststheerrormessagesandprovidesabriefdescriptionofeach.
Table49.
BIOSErrorMessagesErrorMessageExplanationGA20ErrorAnerroroccurredwithGateA20whenswitchingtoprotectedmodeduringthememorytest.
PriMasterHDDErrorPriSlaveHDDErrorCouldnotreadsectorfromcorrespondingdrive.
PriMasterDrive-ATAPIIncompatiblePriSlaveDrive-ATAPIIncompatibleCorrespondingdriveinnotanATAPIdevice.
RunSetuptomakesuredeviceisselectedcorrectly.
A:DriveErrorNoresponsefromdiskettedrive.
CacheMemoryBadAnerroroccurredwhentestingL2cache.
Cachememorymaybebad.
CMOSBatteryLowThebatterymaybelosingpower.
Replacethebatterysoon.
CMOSDisplayTypeWrongThedisplaytypeisdifferentthanwhathasbeenstoredinCMOS.
CheckSetuptomakesuretypeiscorrect.
CMOSChecksumBadTheCMOSchecksumisincorrect.
CMOSmemorymayhavebeencorrupted.
RunSetuptoresetvalues.
CMOSSettingsWrongCMOSvaluesarenotthesameasthelastboot.
Thesevalueshaveeitherbeencorruptedorthebatteryhasfailed.
CMOSDate/TimeNotSetThetimeand/ordatevaluesstoredinCMOSareinvalid.
RunSetuptosetcorrectvalues.
DMAErrorErrorduringread/writetestofDMAcontroller.
FDCFailureErroroccurredtryingtoaccessdiskettedrivecontroller.
HDCFailureErroroccurredtryingtoaccessharddiskcontroller.
CheckingNVRAM.
.
.
.
.
NVRAMisbeingcheckedtoseeifitisvalid.
continued97IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationTable49.
BIOSErrorMessages(continued)ErrorMessageExplanationUpdateOK!
NVRAMwasinvalidandhasbeenupdated.
UpdatedFailedNVRAMwasinvalidbutwasunabletobeupdated.
KeyboardErrorErrorinthekeyboardconnection.
Makesurekeyboardisconnectedproperly.
KB/InterfaceErrorKeyboardinterfacetestfailed.
MemorySizeDecreasedMemorysizehasdecreasedsincethelastboot.
Ifnomemorywasremovedthenmemorymaybebad.
MemorySizeIncreasedMemorysizehasincreasedsincethelastboot.
Ifnomemorywasaddedtheremaybeaproblemwiththesystem.
MemorySizeChangedMemorysizehaschangedsincethelastboot.
Ifnomemorywasaddedorremovedthenmemorymaybebad.
NoBootDeviceAvailableSystemdidnotfindadevicetoboot.
OffBoardParityErrorAparityerroroccurredonanoff-boardcard.
Thiserrorisfollowedbyanaddress.
OnBoardParityErrorAparityerroroccurredinonboardmemory.
Thiserrorisfollowedbyanaddress.
ParityErrorAparityerroroccurredinonboardmemoryatanunknownaddress.
NVRAM/CMOS/PASSWORDclearedbyJumperNVRAM,CMOS,andpasswordshavebeencleared.
Thesystemshouldbepowereddownandthejumperremoved.
PressedCMOSisignoredandNVRAMiscleared.
UsermustenterSetup.
98ErrorMessagesandBeepCodes4.
2Port80hPOSTCodesDuringthePOST,theBIOSgeneratesdiagnosticprogresscodes(POST-codes)toI/Oport80h.
IfthePOSTfails,executionstopsandthelastPOSTcodegeneratedisleftatport80h.
Thiscodeisusefulfordeterminingthepointwhereanerroroccurred.
DisplayingthePOST-codesrequiresaPCIbusadd-incard,oftencalledaPOSTcard.
ThePOSTcardcandecodetheportanddisplaythecontentsonamediumsuchasaseven-segmentdisplay.
NOTEThePOSTcardmustbeinstalledinPCIbusconnector1.
ThetablesbelowofferdescriptionsofthePOSTcodesgeneratedbytheBIOS.
Table50definestheuncompressedINITcodecheckpoints,Table51describesthebootblockrecoverycodecheckpoints,andTable52liststheruntimecodeuncompressedinF000shadowRAM.
Somecodesarerepeatedinthetablesbecausethatcodeappliestomorethanoneoperation.
Table50.
UncompressedINITCodeCheckpointsCodeDescriptionofPOSTOperationD0NMIisDisabled.
OnboardKBC,RTCenabled(ifpresent).
InitcodeChecksumverificationstarting.
D1KeyboardcontrollerBATtest,CPUIDsaved,andgoingto4GBflatmode.
D3Donecessarychipsetinitialization,startmemoryrefresh,anddomemorysizing.
D4Verifybasememory.
D5Initcodetobecopiedtosegment0andcontroltobetransferredtosegment0.
D6Controlisinsegment0.
TocheckrecoverymodeandverifymainBIOSchecksum.
IfeitheritisrecoverymodeormainBIOSchecksumisbad,gotocheckpointE0forrecoveryelsegotocheckpointD7forgivingcontroltomainBIOS.
D7FindMainBIOSmoduleinROMimage.
D8UncompressthemainBIOSmodule.
D9CopymainBIOSimagetoF000shadowRAMandgivecontroltomainBIOSinF000shadowRAM.
Table51.
BootBlockRecoveryCodeCheckpointsCodeDescriptionofPOSTOperationE0OnboardFloppyController(ifany)isinitialized.
CompressedrecoverycodeisuncompressedinF000:0000inShadowRAMandgivecontroltorecoverycodeinF000ShadowRAM.
Initializeinterruptvectortables,initializesystemtimer,initializeDMAcontrollerandinterruptcontroller.
E8Initializeextra(IntelRecovery)Module.
E9Initializefloppydrive.
EATrytobootfromfloppy.
Ifreadingofbootsectorissuccessful,givecontroltobootsectorcode.
EBBootingfromfloppyfailed,lookforATAPI(LS-120,Zip)devices.
ECTrytobootfromATAPI.
Ifreadingofbootsectorissuccessful,givecontroltobootsectorcode.
EFBootingfromfloppyandATAPIdevicefailed.
Givetwobeeps.
Retrythebootingprocedureagain(gotocheckpointE9).
99IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationTable52.
RuntimeCodeUncompressedinF000ShadowRAMCodeDescriptionofPOSTOperation03NMIisDisabled.
Tochecksoftreset/power-on.
05BIOSstackset.
Goingtodisablecacheifany.
06POSTcodetobeuncompressed.
07CPUinitandCPUdataareainittobedone.
08CMOSchecksumcalculationtobedonenext.
0BAnyinitializationbeforekeyboardBATtobedonenext.
0CKBcontrollerI/Bfree.
ToissuetheBATcommandtokeyboardcontroller.
0EAnyinitializationafterKBcontrollerBATtobedonenext.
0FKeyboardcommandbytetobewritten.
10GoingtoissuePin-23,24blocking/unblockingcommand.
11Goingtocheckpressingof,keyduringpower-on.
12ToinitCMOSif"InitCMOSineveryboot"issetorkeyispressed.
GoingtodisableDMAandInterruptcontrollers.
13Videodisplayisdisabledandport-Bisinitialized.
Chipsetinitabouttobegin.
148254timertestabouttostart.
19Abouttostartmemoryrefreshtest.
1AMemoryRefreshlineistoggling.
Goingtocheck15sON/OFFtime.
23Toread8042inputportanddisableMegakeyGreenPCfeature.
MakeBIOScodesegmentwriteable.
24TodoanysetupbeforeIntvectorinit.
25Interruptvectorinitializationtobegin.
Toclearpasswordifnecessary.
27Anyinitializationbeforesettingvideomodetobedone.
28Goingformonochromemodeandcolormodesetting.
2ADifferentbusesinit(system,static,outputdevices)tostartifpresent.
(SeeSection4.
3fordetailsofdifferentbuses.
)2BTogivecontrolforanysetuprequiredbeforeoptionalvideoROMcheck.
2CTolookforoptionalvideoROMandgivecontrol.
2DTogivecontroltodoanyprocessingaftervideoROMreturnscontrol.
2EIfEGA/VGAnotfoundthendodisplaymemoryR/Wtest.
2FEGA/VGAnotfound.
DisplaymemoryR/Wtestabouttobegin.
30DisplaymemoryR/Wtestpassed.
Abouttolookfortheretracechecking.
31DisplaymemoryR/Wtestorretracecheckingfailed.
TodoalternateDisplaymemoryR/Wtest.
32AlternateDisplaymemoryR/Wtestpassed.
Tolookforthealternatedisplayretracechecking.
34Videodisplaycheckingover.
Displaymodetobesetnext.
37Displaymodeset.
Goingtodisplaythepower-onmessage.
38Differentbusesinit(input,IPL,generaldevices)tostartifpresent.
(SeeSection4.
3fordetailsofdifferentbuses.
)39Displaydifferentbusesinitializationerrormessages.
(SeeSection4.
3fordetailsofdifferentbuses.
)3ANewcursorpositionreadandsaved.
TodisplaytheHitmessage.
continued100ErrorMessagesandBeepCodesTable52.
RuntimeCodeUncompressedinF000ShadowRAM(continued)CodeDescriptionofPOSTOperation40Topreparethedescriptortables.
42Toenterinvirtualmodeformemorytest.
43Toenableinterruptsfordiagnosticsmode.
44Toinitializedatatocheckmemorywraparoundat0:0.
45Datainitialized.
Goingtocheckformemorywraparoundat0:0andfindingthetotalsystemmemorysize.
46Memorywraparoundtestdone.
Memorysizecalculationover.
Abouttogoforwritingpatternstotestmemory.
47Patterntobetestedwritteninextendedmemory.
Goingtowritepatternsinbase640kmemory.
48Patternswritteninbasememory.
Goingtofindoutamountofmemorybelow1Mmemory.
49Amountofmemorybelow1Mfoundandverified.
Goingtofindoutamountofmemoryabove1Mmemory.
4BAmountofmemoryabove1Mfoundandverified.
Checkforsoftresetandgoingtoclearmemorybelow1Mforsoftreset.
(Ifpoweron,gotocheckpoint#4Eh).
4CMemorybelow1Mcleared.
(SOFTRESET)Goingtoclearmemoryabove1M.
4DMemoryabove1Mcleared.
(SOFTRESET)Goingtosavethememorysize.
(Gotocheckpoint#52h).
4EMemoryteststarted.
(NOTSOFTRESET)Abouttodisplaythefirst64kmemorysize.
4FMemorysizedisplaystarted.
Thiswillbeupdatedduringmemorytest.
Goingforsequentialandrandommemorytest.
50Memorytesting/initializationbelow1Mcomplete.
Goingtoadjustdisplayedmemorysizeforrelocation/shadow.
51Memorysizedisplayadjustedduetorelocation/shadow.
Memorytestabove1Mtofollow.
52Memorytesting/initializationabove1Mcomplete.
Goingtosavememorysizeinformation.
53Memorysizeinformationissaved.
CPUregistersaresaved.
Goingtoenterinrealmode.
54Shutdownsuccessful,CPUinrealmode.
GoingtodisablegateA20lineanddisableparity/NMI.
57A20addressline,parity/NMIdisablesuccessful.
Goingtoadjustmemorysizedependingonrelocation/shadow.
58Memorysizeadjustedforrelocation/shadow.
GoingtoclearHitmessage.
59Hitmessagecleared.
messagedisplayed.
AbouttostartDMAandinterruptcontrollertest.
60DMApageregistertestpassed.
TodoDMA#1baseregistertest.
62DMA#1baseregistertestpassed.
TodoDMA#2baseregistertest.
65DMA#2baseregistertestpassed.
ToprogramDMAunit1and2.
66DMAunit1and2programmingover.
Toinitialize8259interruptcontroller.
7FExtendedNMIsourcesenablingisinprogress.
80Keyboardteststarted.
Clearingoutputbuffer,checkingforstuckkey,toissuekeyboardresetcommand.
81Keyboardreseterror/stuckkeyfound.
Toissuekeyboardcontrollerinterfacetestcommand.
82Keyboardcontrollerinterfacetestover.
Towritecommandbyteandinitcircularbuffer.
83Commandbytewritten,globaldatainitdone.
Tocheckforlock-key.
continued101IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecificationTable52.
RuntimeCodeUncompressedinF000ShadowRAM(continued)CodeDescriptionofPOSTOperation84Lock-keycheckingover.
TocheckformemorysizemismatchwithCMOS.
85Memorysizecheckdone.
Todisplaysofterrorandcheckforpasswordorbypasssetup.
86Passwordchecked.
Abouttodoprogrammingbeforesetup.
87Programmingbeforesetupcomplete.
TouncompressSETUPcodeandexecuteCMOSsetup.
88ReturnedfromCMOSsetupprogramandscreeniscleared.
Abouttodoprogrammingaftersetup.
89Programmingaftersetupcomplete.
Goingtodisplaypower-onscreenmessage.
8BFirstscreenmessagedisplayed.
messagedisplayed.
PS/2MousecheckandextendedBIOSdataareaallocationtobedone.
8CSetupoptionsprogrammingafterCMOSsetupabouttostart.
8DGoingforharddiskcontrollerreset.
8FHarddiskcontrollerresetdone.
Floppysetuptobedonenext.
91Floppysetupcomplete.
Harddisksetuptobedonenext.
95InitofdifferentbusesoptionalROMsfromC800tostart.
(SeeSection4.
3fordetailsofdifferentbuses.
)96GoingtodoanyinitbeforeC800optionalROMcontrol.
97AnyinitbeforeC800optionalROMcontrolisover.
OptionalROMcheckandcontrolwillbedonenext.
98OptionalROMcontrolisdone.
AbouttogivecontroltodoanyrequiredprocessingafteroptionalROMreturnscontrolandenableexternalcache.
99AnyinitializationrequiredafteroptionalROMtestover.
Goingtosetuptimerdataareaandprinterbaseaddress.
9AReturnaftersettingtimerandprinterbaseaddress.
GoingtosettheRS-232baseaddress.
9BReturnedafterRS-232baseaddress.
GoingtodoanyinitializationbeforeCoprocessortest.
9CRequiredinitializationbeforeCoprocessorisover.
GoingtoinitializetheCoprocessornext.
9DCoprocessorinitialized.
GoingtodoanyinitializationafterCoprocessortest.
9EInitializationafterCoprocessortestiscomplete.
Goingtocheckextendedkeyboard,keyboardIDandnum-lock.
A2Goingtodisplayanysofterrors.
A3Softerrordisplaycomplete.
Goingtosetkeyboardtypematicrate.
A4Keyboardtypematicrateset.
Toprogrammemorywaitstates.
A5Goingtoenableparity/NMI.
A7NMIandparityenabled.
GoingtodoanyinitializationrequiredbeforegivingcontroltooptionalROMatE000.
A8InitializationbeforeE000ROMcontrolover.
E000ROMtogetcontrolnext.
A9ReturnedfromE000ROMcontrol.
GoingtodoanyinitializationrequiredafterE000optionalROMcontrol.
AAInitializationafterE000optionalROMcontrolisover.
Goingtodisplaythesystemconfiguration.
ABPutINT13moduleruntimeimagetoshadow.
ACGenerateMPformultiprocessorsupport(ifpresent).
ADPutCGAINT10module(ifpresent)inShadow.
continued102ErrorMessagesandBeepCodesTable52.
RuntimeCodeUncompressedinF000ShadowRAM(continued)CodeDescriptionofPOSTOperationAEUncompressSMBIOSmoduleandinitSMBIOScodeandformtheruntimeSMBIOSimageinshadow.
B1Goingtocopyanycodetospecificarea.
00Copyingofcodetospecificareadone.
GoingtogivecontroltoINT-19bootloader.
4.
3BusInitializationCheckpointsThesystemBIOSgivescontroltothedifferentbusesatseveralcheckpointstodovarioustasks.
Table53describesthebusinitializationcheckpoints.
Table53.
BusInitializationCheckpointsCheckpointDescription2ADifferentbusesinit(system,static,andoutputdevices)tostartifpresent.
38Differentbusesinit(input,IPL,andgeneraldevices)tostartifpresent.
39Displaydifferentbusesinitializationerrormessages.
95InitofdifferentbusesoptionalROMsfromC800tostart.
Whilecontrolisinsidethedifferentbusroutines,additionalcheckpointsareoutputtoport80hasWORDtoidentifytheroutinesunderexecution.
IntheseWORDcheckpoints,thelowbyteofthecheckpointisthesystemBIOScheckpointfromwhichthecontrolispassedtothedifferentbusroutines.
Thehighbyteofthecheckpointistheindicationofwhichroutineisbeingexecutedinthedifferentbuses.
Table54describestheuppernibbleofthehighbyteandindicatesthefunctionthatisbeingexecuted.
Table54.
UpperNibbleHighByteFunctionsValueDescription0func#0,disablealldevicesonthebusconcerned.
1func#1,staticdevicesinitonthebusconcerned.
2func#2,outputdeviceinitonthebusconcerned.
3func#3,inputdeviceinitonthebusconcerned.
4func#4,IPLdeviceinitonthebusconcerned.
5func#5,generaldeviceinitonthebusconcerned.
6func#6,errorreportingforthebusconcerned.
7func#7,add-onROMinitforallbuses.
103IntelDesktopBoardD915GAV/D915GAGTechnicalProductSpecification104Table55describesthelowernibbleofthehighbyteandindicatesthebusonwhichtheroutinesarebeingexecuted.
Table55.
LowerNibbleHighByteFunctionsValueDescription0GenericDIM(DeviceInitializationManager)1On-boardSystemdevices2ISAdevices3EISAdevices4ISAPnPdevices5PCIdevices4.
4SpeakerA47inductivespeakerismountedontheboard.
Thespeakerprovidesaudibleerrorcode(beepcode)informationduringPOST.
ForinformationaboutRefertoThelocationoftheonboardspeakerFigure1,onpage144.
5BIOSBeepCodesWheneverarecoverableerroroccursduringPOST,theBIOSdisplaysanerrormessagedescribingtheproblem(seeTable56).
TheBIOSalsoissuesabeepcode(onelongtonefollowedbytwoshorttones)duringPOSTifthevideoconfigurationfails(afaultyvideocardornocardinstalled)orifanexternalROMmoduledoesnotproperlychecksumtozero.
AnexternalROMmodule(forexample,avideoBIOS)canalsoissueaudibleerrors,usuallyconsistingofonelongtonefollowedbyaseriesofshorttones.
Formoreinformationonthebeepcodesissued,checkthedocumentationforthatexternaldevice.
ThereareseveralPOSTroutinesthatissueaPOSTterminalerrorandshutdownthesystemiftheyfail.
Beforeshuttingdownthesystem,theterminal-errorhandlerissuesabeepcodesignifyingthetestpointerror,writestheerrortoI/Oport80h,attemptstoinitializethevideoandwritestheerrorintheupperleftcornerofthescreen(usingbothmonochromeandcoloradapters).
IfPOSTcompletesnormally,theBIOSissuesoneshortbeepbeforepassingcontroltotheoperatingsystem.
Table56.
BeepCodesBeepDescription1CPUerror3Memoryerror6Systemfailure7Systemfailure8Videoerror