Abit PR5 User manual

FCC Information
FederalCommunications Commission RadioFrequencyInterferenceStatement
Thisequipmenthas beentested and foundtocomplywiththe limitsforaClass BDigitalDevice,pursuanttoPart
15ofthe FCCRules.These limitsaredesigned toprovide reasonable protection againstharmfulinterferenceina
residentialinstallation.Thisequipmentgenerates,usesandcanradiateradiofrequencyenergyand,ifnotinstalled
and used inaccordance withthe instructions,may causeharmfulinterference toradiocommunication.However,
thereisnoguaranteethatinterferencewillnotoccurinaparticularinstallation.Ifthisequipmentdoescause
harmfulinterferencetoradioortelevisionreception,whichcanbedeterminedbyturningtheequipmentoffandon,
theuserisencouragedtotrytocorrecttheinterferencebyoneormoreofthefollowingmeasures:
•Reorientorrelocatethe receiving antenna.
•Increase the distance between the equipmentand receiver.
•Connecttheequipmenttoanoutleton acircuitdifferentfromthattowhich the receiverisconnected.
•Consultthe dealeroran experienced radio/TV technician forhelp.
Changes ormodifications notexpressly approvedbythe mainboardmanufacturercouldvoidthe user’sauthorityto
operatethisequipment.To ensurecompliance thesubjectdevicemustuseshielded interfacecables.

Version1.01
Copyright©September1996Allrightsreserved
Thispublication maynotbe copied,reproduced,translated,transmitted orreduced to
anyprintedorelectronicmediumortoanymachinereadableform,orstoredina
retrievalsystem,eitherinwholeorinpartwithoutthewritten consentofthecopy-
rightholders.
Thecontentsofthispublication aresubjecttochange.The manufacturerreservesthe
righttoalterthe contentsofthispublication atanytimeandwithoutnotice.The
contentsofthispublicationmaycontaininaccuraciesortypographicalerrorsandis
suppliedforinformationaluseonly.
Productsarenoted inthispublication foridentification purposesonly.Microsoftisa
registeredtrademarkandWindowsisatrademarkofMicrosoftCorporation.Pentium
isatrademarkofIntelCorporation.All otherproductnamesorbrandsmaybetrade-
marks orregisteredtrademarks oftheirrespectiveholders.
PartNo.: MN–083–B11–81

Contents
Introduction...............................................................................................................................................................................................................1–1
Manual Features..............................................................................................................................................................................................1–1
PackageContents...........................................................................................................................................................................................1–2
FeatureSummary...........................................................................................................................................................................................1–2
StaticElectricDischarge Precautions...........................................................................................................................................1–4
HardwareConfiguration.....................................................................................................................................................................................2–1
ConfigurationQuickReference................................................................................................................................................................2–1
CPU Configuration&Installation..................................................................................................................................................2–1
CPUVoltage.....................................................................................................................................................................................2–1
External ClockFrequency&External ClockFactor....................................................................................................2–3
DRAMInstallation..................................................................................................................................................................................2–7
DIMMVoltageSettings..............................................................................................................................................................2–8
OnboardConnectors......................................................................................................................................................................................2–9
Drive Controller&I/OPortConnectors....................................................................................................................................2–9
SystemEnclosureConnectors......................................................................................................................................................2–12
OtherConnectors.................................................................................................................................................................................2–14
PowerInputConnector...........................................................................................................................................................2–14
Keyboard&PS/2Mouse Connectors...........................................................................................................................2–14
IDE ActivityLED Connector....................................................................................................................................................2–14
CPUFanPowerConnector....................................................................................................................................................2–14
PR5HardwareConfiguration.................................................................................................................................................................2–16
CPU Options &Installation............................................................................................................................................................2–16
RelatedTerminology.................................................................................................................................................................2–16
CPUSettings.................................................................................................................................................................................2–18
SystemMemoryConfiguration...................................................................................................................................................2–26
DIMMVoltageSettings...........................................................................................................................................................2–29
InstallingMemoryModules...........................................................................................................................................................2–30
Level2Cache Options.....................................................................................................................................................................2–32
OnboardConnectors...................................................................................................................................................................................2–33
DiskDrive Controller&I/OPort Connectors......................................................................................................................2–33
SystemEnclosureConnectors......................................................................................................................................................2–35
OtherConnectors.................................................................................................................................................................................2–35
PowerInputConnector...........................................................................................................................................................2–35
Keyboard&PS/2Mouse Connectors...........................................................................................................................2–35
IDE ActivityLED Connector....................................................................................................................................................2–37
CPUFanPowerConnector....................................................................................................................................................2–37
DIPSwitch&JumperSummary.................................................................................................................................................2–38
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2
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3
9

JP3:ClearCMOSMemory....................................................................................................................................................2–39
JP8:FlashROMType...............................................................................................................................................................2–40
SoftwareConfiguration.......................................................................................................................................................................................3–1
TheBIOS CMOSSetupUtility..................................................................................................................................................................3–1
AccessingThe CMOSSetupUtility................................................................................................................................................3–1
StandardCMOS Setup........................................................................................................................................................................3–4
BIOS Features Setup............................................................................................................................................................................3–8
ChipsetFeaturesSetup....................................................................................................................................................................3–13
PowerManagementSetup............................................................................................................................................................3–14
PCI&OnboardI/OSetup.............................................................................................................................................................3–18
Load BIOS Defaults............................................................................................................................................................................3–22
LoadSetupDefaults..........................................................................................................................................................................3–23
PasswordSetting................................................................................................................................................................................3–24
IDEHDDAutoDetection..................................................................................................................................................................3–25
HDD LowLevelFormat....................................................................................................................................................................3–25
Save AndExitSetup..........................................................................................................................................................................3–25
ExitWithoutSaving...........................................................................................................................................................................3–25
Updating TheBIOS......................................................................................................................................................................................3–25
IDE DriverDisk...............................................................................................................................................................................................3–25
TechnicalInformation..........................................................................................................................................................................................4–1
CPUSpecifications..........................................................................................................................................................................................4–1
Intel CPUs...................................................................................................................................................................................................4–2
AMDK5CPUs...........................................................................................................................................................................................4–9
CyrixCPUs...............................................................................................................................................................................................4–10
IDEInstallationGuide................................................................................................................................................................................4–11
IDETransferModes............................................................................................................................................................................4–11
InstallingIDEDevices........................................................................................................................................................................4–12
IDECables......................................................................................................................................................................................4–12
ExampleIDEConfigurations..........................................................................................................................................................4–12
BIOSSetup.............................................................................................................................................................................................4–17
IDE HardDiskFormatting...............................................................................................................................................................4–17
Technical Support.........................................................................................................................................................................................4–18
Troubleshooting Guidelines............................................................................................................................................................4–18
The Troubleshooting Form..............................................................................................................................................................4–19

Introduction
Thismanualhasthe information you will need toinstall,
configureand useyourPR5mainboard.Thissectioncov-
ersmanualfeatures,whatisincluded inthe PR5package
and asummaryofthe PR5’sfeatures.
ManualFeatures
Thismanualisdesigned topresentinformationinboth
summaryand detail sothatwhetheryou areunfamiliar
withatopicorjustneed togetsomespecificinforma-
tion,youcanfindwhatyouneedwithaminimumof
effort.The summarized informationisintended forex-
perienced users.Pleaserefertothe detailed explanations
ifyouareunfamiliarwithatopic.
Alistofthemaintopicsineachsectionappearsinthe
sidebaronthefirstpage.Themanualisdividedintofour
sections:
Section1:Introduction
Section 2:HardwareConfiguration
Section 3:SoftwareConfiguration
Section4:TechnicalInformation
Illustrationsand tablesidentifylocationsand settingsand
sidebarnotesandpointersareusedtohighlightimpor-
tantinformation.
SidebarNotes
Summaryinformation,tipsand importantpointsgener-
allyareinthe sidebaron the leftside ofthe page.Ifthe
informationinthesidebarisnotsufficientforyou,check
the maintextnearbyforadditionalinformation orrefer
tothecomponentlocationnotedinthe sidebar.
Pointers
Cautions,importantinformation,tipsand keypointsare
highlightedbythe followingicons:
Cautions&ImportantInformation
Tips&KeyPoints
Section1
Manual Features
PackageContents
FeatureSummary
☞
!

Package Contents
IfyourPR5isalreadyinstalled inasystemyoucan skip
thissection.IfyouareinstallingthePR5yourself, please
checkand makesurethatall itemslistedarepresentand
undamaged.Ifanything ismissingordamaged,please
contactyourvendorforinstructions.
The PR5package containsthe following items:
•PR5mainboard
•Cablepack including:
1Parallelcable/portassembly
1Dualserialcable/portassembly
1Floppycontrollerribbon cable
2IDEcontrollerribbon cables
1USB cable/portassembly(optional)
•SupportDisk floppydisk
•User’sManual
Thecablesconnecttotheportand controllerconnector
headerson the mainboard.Thisisexplained inSection 2.
TheSupportDiskhasdriversforusewithvariousoper-
ating systems.ThesearecoveredinSection 3.
FeatureSummary
ThePR5mainboardincorporatesavarietyofperfor-
mance-enhancingfeaturesand isdesigned foruseinFile
ServerandWorkstation computersand otherhigh-end
applications.ItusesIntel’s430VXchipset,itsPCIexpan-
sionbussupportstheconcurrentPCI2.1standardandit
hastwoUniversalSerialBus(USB)ports.
Thememorysubsystemincludesan upgradable256KB
PipelineBurstLevel2cache and supportforboth72-pin
FastPageMode(FPM)andEDOSIMMmemorymod-
ulesaswellas168-pinDIMMmodules.Thisdesignsup-
portsbothcurrentmemorystandardsandprovidesan
upgrade pathtofuturehigh-performance64-bitmemory.

The PR5’sfeaturelistincludes:
CPUSupport–Socket7ZIFsocketforPentiumand com-
patibleCPUsasfollows:
•IntelPentium75–200MHzCPUs
•AMDAMD-K575–100MHzCPUs
•Cyrix6x86 P120+,133+,150+and 166+CPUs
•FuturePentium-classCPUs
Chipset–Intel430VX:
•IncorporatesconcurrentPCRev.2.1forenhanced
interfacecardspeed
L2Cache–PipelineBurstLevel2cache:
•256KBonboard
•Upgradableto512KB usingCOASTmodulein
upgrade socket
SystemDRAM–Expandableup to128MBinmultiple
configurations(noDIMMsocketsonPR5B):
•Four72-pinsocketsforFastPageorEDODRAM
SIMMmemorymodules
•Two168-pinsocketsforFastPage,EDOor
SDRAMDIMM memorymodules
•SupportsIntel-specified 3.3VUnbufferedDRAM
forDIMMmodules
SystemBIOS–AwardBIOSwithsupportfor:
•Plug and Play
•Advanced PowerManagement
•DMI(Desktop ManagementInterface)featuresin-
cludingsystemsuspend
OnboardMultiI/O–OnboardI/Oportsanddisk con-
trollersincluding:
•TwoUniversalSerialBus(USB)ports
•One EPP/ECPbidirectionalparallelport
•Twohigh-speed16550-compatibleserialports
•Floppydisk controllersupports360KB,720KB,
1.2MB,1.44MBand 2.88MBformats
•Enhanced IDEharddisk controllersupportsPIO
Mode 0–4and BusMastering
AdditionalFeatures–Otherfeaturesinclude:
•“AT”dimensionsforeaseofinstallation
•ExpansionbuswithfourISA and three PCIslots
•Supportforthe3-Mode floppydisk standard
•Canbootfromeitheroftwoharddiskdrivesal-
lowingsupportfordualoperatingsystems

PR5 MainboardLayoutKey
1.ISA Bus ExpansionSlots
2.PCIBus Expansion Slots
3.USBPortConnector
4.Floppy Disk Drive ControllerConnector
5.IDE ControllerConnectorsIDE1(left)&IDE2 (right)
6.PS/2Mouse(left)&Keyboard(right)Connectors
7.PowerInputConnectors
8.COM1(left)&COM2(right)Serial,LPTParallelPortConnectors
9.SIMM Memorymodulesockets1–4(left toright)
10.DIMMMemorymodule sockets1&2(left toright)
11.DS DIPswitches
12.CMOSBattery
13.VCDIPswitches
14.Flash BIOS Chip
15.COASTPBSRAMcachemodule socket
16.HeatSinks
StaticElectricDischargePrecautions
Staticelectricdischargecandeliverahigh-voltageshock
tothe mainboardsufficienttodamage ordestroycom-
ponentson the board.Becauseofthis,itisimportantto
observeprecautionswhenyouhandlethemainboardand
anydevicesyouinstallonit,including the CPU,memory
modulesandexpansioncards.
Thereareseveralsimpleprecautionsyoucantake:
•Useananti-staticwriststrap,whichcan be pur-
chased inexpensivelyfrommostcomputerstores.
Connectthe strap lead toagrounded metallicob-
jectandputonthestrapbeforetouchinganycom-
ponents.
•Putcomponentson ananti-staticpad orkeepthem
intheiranti-staticpackaginguntilyouinstallthem.
•Ifyoudon’thaveawriststraporpad,makesure
totouchametallicobjectsuchasthesystemcase
toground yourselfbeforehandling anycompo-
nents.

AB–PR5 PCIMainboardLayout
12
3
4
5
6
7
8
PBSRAM
PBSRAM
438VX
438VX
82437VX
82371
PIIX3
Pentium
CPU
Ultra
IO
9
10
11
12
131415
16

SystemBlockDiagram