Abit AR5 User manual

PartNo:MN-086-B21-21 Rev:1.01
TableofContents
Chapter 1IntroductionofAR5Features
¬Specifications.....................................................................1-2
-Layoutdiagram..................................................................1-4
®Systemblockdiagram.........................................................1-5
Chapter 2Installing theMainboard
¬StandardExternalConnectors............................................2-3
-JumpersandSwitches.......................................................2-10
®PresentationandInstallationoftheCPU...........................2-11
¯InstallingSystemMemory ¡i DRAMMemory ¡j ...........2-14
Chapter 3IntroductionofBIOS
¬CPUsetup ¡i CPUSOFTMENU™¡j .............................3-3
-StandardCMOSSetup Menu.............................................3-9
®BIOSFeaturesSetup Menu..............................................3-11
¯ChipsetFeaturesSetup Menu...........................................3-17
°PowerManagementSetup Menu......................................3-19
±PCI&OnboardI/OSetup................................................3-23
²LoadBIOSDefaults.........................................................3-28
³LoadSetup Defaults.........................................................3-28
´PasswordSetting..............................................................3-29
µIDEHDD AutoDetection................................................3-30
AppendixAQuickInstallation
AppendixBIntelPentiumCPUs
AppendixCAMD-K5CPUs
AppendixDCyrix6x86 CPUs
AppendixEGeneralDiscussionaboutHDD Installation

AppendixFTechnicalSupport

IntroductionofAR5Features1-1
Chapter1Introduction ofAR5
Features
TheAR5havebeenespeciallydesignedforFileserver,Workstationand
Professionalusers.Itcansupportawiderangeofprocessors,includingall Intel
CPUs(P54C)andIntelCPUswithMMX(P55C),aswell asall AMD-K5and
Cyrix6x86/6x86LCPUs.Italsotakesintoaccount,asmuchaspossible,all
futureCPUs.
TheAR5usesSOFTMENU™technology,whichmeansthatall the
parameterscanbeconfiguredwithoutusingDIPswitchesorjumpers.The
configurationisentirelyachievedthrougha“SoftSwitch”thatallowstheuserto
setCPUspeedandoperatingvoltagewithease.
TheAR5usesIntel430VX serieschipsets,andhas256Kor512KLevel-2
PipelineBurstSRAMonboard.Italsoprovidesanextensionslotallowingthe
usertoupgradePipelineBurstSRAMto512K.
Two168-pinDIMM slotsandfour72-pinSIMM slotsmeetthe
requirementsforall memoryconfigurationsrequiredbyhighlevelcomputing.
The168-pinDIMM slotssupporttraditionalFastPageandEDO DRAMasa
memorystandardfornextgeneration64-bitsystems.Thetwo168-pinDIMM
slotshavebeenreservedtomeetrequirementsforbothpresentandfuture
upgrades.
TheAR5alsoprovidestwoUniversalSerialBus(USB)portsandmeetsthe
ConcurrentPCIRev.2.1standard.ItalsosupportsIDEinterface forFast
HDD (Mode0~4),aswell asIDEBusMaster.Thesefeaturesalsomeet
presentandfutureinterface standardsandneeds.
SystemBIOSfeaturesincludePlug-and-Play(PnP),AdvancedPower
Management(APM),thenewestDesktopManagementInterface (DMI),aswell
asAR5’suniqueCPUoperatingfrequencyandvoltagesetup featureinorderto
meetmoderncomputingdemands.

1-2Chapter1
¬ Specifications
1.CPUfrequencyandvoltagesetup withCPU“SOFTMENU™ ”
lSetup ofthemainboard’sfrequencyandvoltagewithoutDIP
SwitchesorJumpers.
lModificationofCPUoperatingvoltageandfrequencythrough
softwareconfiguration.
lModificationofCPUoperatingvoltageandfrequencydirectlyon
screen.
2.UsesZIFCPUSocket7foreasyCPUinstallation
lThree voltageregulator/coolingplatesetsforamorestableCPU
operatingenvironment
lSupportsIntelPentiumCPUs:75MHzto200MHzandP55C
CPUswithMMX
lSupportsall AMDsixthgenerationAMD-K5™CPUs:75MHzto
100MHz
lSupportsall Cyrixsixthgeneration6x86™CPUs:P120+,P133+,
P150+,P166+,P200+
lReservedcircuitrysupportsfuturesixthgenerationCPUs
3.Chipset
lIntel430VX chipset
lSupportsstandardversionPCI2.1
4.L2CacheMemory
l256Kor512Kofcachememory(PipelineBurstSRAM)
5.SystemDRAM
lFour72-pinSIMM sockets:supportFPandEDO DRAM
lTwo168-pinDIMM sockets:supportFP,EDO andSynchronous
DRAM(SDRAM)
lDIMM socketsusePCmodules(3.3VUnbufferedDRAM)
lUpto128MBmemoryconfigurationpossible
6.SystemBIOS
lAWARDBIOS
lSupportsPlug-and-Play(PnP)
lSupportsAdvancedPowerManagement(APM)
lSupportsDesktopManagementInterface (DMI)

IntroductionofAR5Features1-3
7.MultiI/Ofeatures
l TwoUniversalSerialBus(USB)ports
l FourfastIDEchannels(PIOmode0~4andBusMaster)
lOneEPP/ECPparallelportandone16550 serialport
l Twofloppydiskdriveconnectors(FDD)(360K,720K,1.2M,
1.44Mand2.88M)
8.Otherfeatures
l StandardATXarchitecturedimensions
l FourISAbusslotsandfourPCIbusslots
l Supports3-MODEforaspecialJapanesefloppydiskdrive
l Supportstwobootableharddisks--abletoruntwodifferent
operatingsystems
Note:All brandnamesandtrademarksarethepropertyoftheirrespectiveowners.

1-4Chapter1
- Layoutdiagram
Fig1-1Layoutdiagram

IntroductionofAR5Features1-5
® Systemblockdiagram
Fig.1-2Systemblockdiagram
Pentium  Processor
3.3V
HostBUS
Control
Address
Data
Second
LevelCache
Ctrl
Tag CtrlData
TIO[0..7]
Addr
Ctrl
PCIBUSTXDCtrl
Plink
Control
Address/Data
Fast
IDE
ISA BUS
UniversalSerialBus
TDX
Main
Memory
(DRAM)
CACHE
(SRAM)
TAG
TVX
PIIX3
CD ROM&
HardDisk
USB
1
USB
2
PCIDevice(s)
ALi
M5123
ISA Device(s)
SerialLPT
FDC

1-6Chapter1

InstallingtheMainboard 2-1
Chapter2Installing theMainboard
ThisAR5mainboardnotonlyprovidesall standardequipmentforclassic
personalcomputers,butalsoprovidesgreatflexibilityformeetingfutureupgrade
demands.Thischapterwill introduce stepbystepall thestandardequipment
andwill alsopresent,ascompletelyaspossiblefutureupgradecapabilities.This
mainboardisabletosupportall IntelPentiumincludingP55CwithMMX,Cyrix
6x86,6x86LandAMD-K5processorsnowonthemarket.(Fordetails,see
specificationsinChapter1.)However,wecannotguarantee thatthe
descriptiongiveninthismanualonthecircuitryofyourmainboardwill workfor
processorsnotlistedinChapter1.Forexample,theoperatingvoltageof
Cyrix’snextgenerationCPUsisunknownatthepresenttime.Thuswewere
notabletoincludethesespecificationsinyourmotherboard.Wewill supply
furtherinformationaboutCPUsupportwhennewCPUsarriveonthemarket.
Thischapterisorganizedaccordingthefollowingfeatures:
ŒStandardexternalconnectors
•Jumpersandswitches
ŽPresentationandInstallingoftheCPU.
•Installingcachememory--Ifyoudon’twanttoupgradethecache
memoryyoucanskipthischapter.
•Installingthesystemmemory.
NNNN
Before proceedingwiththeinstallation
Beforeinstallingthemainboardpleasebesuretoturnoff ordisconnectthe
powersupplyunit.Beforemakinganymodificationstothehardware
configurationofthemainboard,thepowersupplytoanyareasofthemainboard
youplantomodifyshouldbeturnedoff toavoidunnecessarydamagetothe
hardware.

2-2Chapter2
&
User friendlyinstructions
Ourobjectiveistoenablethenovice computerusertoperformthe
installationbythemselves.Wehaveattemptedtowritethisdocumentinavery
clear,conciseanddescriptivemannertohelpovercomeanyobstaclesyoumay
face duringinstallation.Pleasereadourinstructionscarefullyandfollowthem
carefullystep-by-step.

InstallingtheMainboard 2-3
¬ StandardExternalConnectors
Insidethecaseofanycomputerseveralcablesandplugshavetobe
connected.Thesecablesandplugsareusuallyconnectedone-by-oneto
connectorslocatedonthemainboard.Youneedtocarefullypayattentionto
anyconnectionorientationthecablesmayhaveand,ifany,notice thepositionof
thefirstpinoftheconnector.Intheexplanationsthatfollow,wewill describe
thesignificance ofthefirstpin.
J6 -KeylockconnectorPleasepayattention topinposition and orientation
Thisconnectorhasaspecificorientation.Connectthefive-threadkeylock
connectorcabletotheJ6connectorpinsonthemainboard.
PinnumberNameorsignificance ofsignal
20 +5VDC
19 Noconnection
18 Ground
17 Keyboardinhibit Signal
16 Ground
The“keylockswitch”isusedtolockthecomputer’skeyboard.
Thisdisablesthekeyboardsothatunauthorizedpersonscannot
useit.Whenthisfunctionisinuse,youwill needtousethe
unlockkeytoactivatethekeyboard.
Computer
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2-4Chapter2
J6 -HardwareSuspend switch
Thereisnospecificorientation.Connectthetwo-threadhardwaresuspend
plug totheJ6connectorpinsonthemainboard.Since mostcasesdonot
supportthisfeature,mostofyouignorethisinstruction.Furthermore,this
featureisnotnecessaryasitisalreadyapartofthemainboard.
PinnumberNameorsignificance ofthesignal
7Suspend
6Ground
J6 -HardwareResetconnector
Thereisnospecificorientation.Connectthetwo-threadhardwareresetcable
totheJ6connectorpinsonthemainboard.
PinnumberNameorsignificance ofsignal
1Ground
2Hardwareresetsignal
The“HardwareReset”isusedtoresetthecomputerduring
operationwithoutturningthecomputeroff andbackon.For
example,ifyouarerunninganapplicationthatstops
respondingtothecomputer,youmaypress theResetbuttonto
restartthecomputer.
J6 -Speakerconnector
Thereisnospecificorientation.Connectthefour-threadspeakercabletothe
J6connectorpinsonthemainboard.
PinnumberNameorsignificance ofsignal
11 +5VDC
12 Ground
13 Ground
14 SoundSignal
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InstallingtheMainboard 2-5
J6 -TurboswitchLEDconnector
Thisconnectorhasaspecificorientation.Connectthetwo-threadturboswitch
LEDplug totheJ6connectorpinsonthemainboard.
PinnumberNameorsignificance ofsignal
9AnodeterminalofTurbo LED
8CathodeterminalofTurbo LED
The“hardwareTurboLED”indicatesthestatusofhardware
operatingspeed.
J5 -IDELEDconnector
Thisconnectorhasaspecificorientation.Connectthetwo-threadIDELED
connectorcableattachedtothecasetotheIDELEDconnectoronthe
mainboard.
PinnumberNameorsignifigance ofsignal
1LED’sCathode
2LED’sAnode
3LED’sAnode
4LED’sCathode
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2-6Chapter2
JP10 -Standbyconnector
Thereisnospecificorientation.MostofthepresentATcasesdonotsupport
thisfeaturesomostofyoucanignorethisinstruction.Ifyourcasehasacable
fortheStandbyfeature,youshouldconnectthiscabletotheconnectoronthe
Mainboard.
PinnumberNameorsignificance ofsignal
1Standbypowersupply¡i+5VSB¡j
2Controlsignalofcomputerswitchofthecase
The“standbyconnector,”unlikethetraditionalmechanical
switch,isanelectronicwaytoturnthecomputer’spoweroff.
Tousethisfeature,thepowersupplysystemmustpermita
shutdownpowersupply(+5VSB),supporttheelectronic
switchfeature,andmustalsobeusedwiththeATXpower
connectorJ3onthemainboard.Forexample,whenusing
Windows95,yourcomputerwill automaticallyshutdownafter
havingsavedyourworkwhenyouexitWindows.Youdonot
needtousethemechanicalswitchtoturnthecomputeroff.
JP1-CPUFanpowerconnector
Thishasaspecificorientation.Connectthethree-threadsCPUfancabletothe
JP1connector.
PinnumberNameofthesignalorsignification
1Ground
2+12V
3Ground
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InstallingtheMainboard 2-7
J1 -PS/2MouseconnectorWatchthepinnumberand theorientation
Thishasaspecificorientation.Connectthesix-threadsPS/2Mousecable
providedtotheJ1connectoronthemainboard.
PinnumberNameofthesignalorsignification
1Mousedata
2Noconnection
3Ground
4+5VDC
5Ground
6Mouseclock
The“PS/2MousePort”isdifferentfromCOM1orCOM2serial
portstowhichyoucanalsoconnectaMouse.Thismainboard
featuresanextraPS/2Mouseport,sowhenyoubuyamouse,be
surethatitisaPS/2Mousebeforeconnectingittothisport.But
ifyoucannotfindanyPS/2Mouse,youcanstill useCOM1or
COM2toconnectaserialmousetoyourcomputer.
J2 -PS/2KeyboardConnector
Thishasanorientationpin.ConnectyourkeyboardconnectortotheJ2
connectoronthemainboard.
PinnumberNameofthesignalorsignification
1Keyboarddata
2Noconnection
3Ground
4+5VDC
5Ground
6Keyboardclock
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2-8Chapter2
J4 -PowerinputConnectorsWatchthepinnumberand theorientation
Thesehaveaspecificorientation.Thethree warningmarksindicatethatifyou
makeamistakeinpinnumberorconnectionorientation,youcoulddestroyyour
equipment.Duringinstallation,youjustneedtoconnecttothecorrectpinsand
inthecorrectorientation,andtoconnectconnectorsP8andP9ofthepower
supplyunittotheconnectorsonthemainboard.
PinnumberNameofthesignalor
significationPinnumberNameofthesignalor signification
1POWERGOOD 7Ground
2+5VDC8Ground
3+12VDC9-5VDC
4-12VDC10 +5VDC
5Ground 11 +5VDC
6Ground 12 +5VDC
J3 -ATXPowerinputConnectors
Thesehaveaspecificorientation.Thethree warningmarksindicatethatifyou
makeamistakeinpinnumberorconnectionorientation,youcoulddestroyyour
equipment.Duringinstallation,youjustneedtoconnecttothecorrectpinsand
inthecorrectorientation,andtoconnectconnectorofthepowersupplyunitto
theJ3connectorsonthemainboard.
PinnumberNameofthesignalor
significationPinnumberNameofthesignalor signification
1+3.3VDC11 +3.3VDC
2+3.3VDC12 -12VDC
3Ground 13 Ground
4+5VDC14 PS_ON
5Ground 15 Ground
6+5VDC16 Ground
7Ground 17 Ground
8POWERGOOD 18 -5VDC
9+5VDC19 +5VDC
10 +12VDC20 +5VDC

InstallingtheMainboard 2-9
JP7-InfraredremoteConnectorsWatchthepinnumberand theorientation
Thishasaspecificorientation.Yourmainboardsupportsthisfeature,butyou
mustbuytheinfraredremotedevice asanoption.
PinnumberNameofthesignalorsignification
1+5VDC
2Noconnection
3Receivedata
4Ground
5Transmit data
I/O PortconnectorsWatchthepinnumberand theorientation
ConnectornamePinnumberNameoftheperipheralconnected
IDE1 40 IDEChannel1
IDE2 40 IDEChannel2
FDC34 FloppyDiskconnector
LPT26 Parallelportconnector
COM1 10 SerialportCOM1connector
COM2 10 SerialportCOM2connector
USB16 UniversalSerialBusconnector

2-10 Chapter2
- Jumpersand Switches
JP6:DeletethecontentsoftheCMOS
Thisjumperissetonpins1and2atthefactory,inorderforthe
computertofunctionnormally,sopleasedonotchangethissetting.
Themainfeatureofthisjumperistosolvesituationswherethe
computercrashesduetoimproperusage.Forinstance:
lYouhaveforgottenthepasswordyouset.
lYouhavechangedinappropriatelythesettingsintheBIOS
menu.
lYouwanttochangetheversionofflashBIOS.
All theseerrorsareveryserious,youmustavoidthem.Butifyouhave
madeoneoftheseerrors,thisjumpercansaveyourlife.Firstturnoff
thepowersupplyandopenthecomputercase,thanplace thejumper
onpins2and3inordertosaveyourcomputer.Butifyouuseyour
computernormally,youshouldnotneedtousethisfeature.
AfteryouhavedeletedtheCMOSinformation,thecomputerissaved,butyou
still havetogobacktotheBIOSSetup menu,andresetonebyoneall the
specifications:CPU,date,hour,FDD andHDD parameters.etc., beforeyour
computerwill getbackintonormaloperation.
JP9:ATXPowerselectPowerON/OFF
(Pin1-2):Highactive
(Pin2-3):Lowactive
Thisjumperissetonpins1and2atthefactory.

InstallingtheMainboard 2-11
® Presentationand InstallationoftheCPU
Jumperless Mainboard(MainboardwithnoDIPSwitchorJumper)
TheAR5mainboardcanbeinstalledwithCPUwithoutthehardware
settingoftheCPU.
Onotherboards,whenyouwanttoinstall theCPU,youhave,moreorless,
tosetup somejumpersorDIPswitches.WiththeAR5mainboard,youwill not
needtoadjustanyjumperorswitch.TheCPUspeedandmodelissetup by
software,inordertoallowtheusertocompletesetup andinstallationprocedures
easily.AfteryouhaveinsertedtheCPUontheCPUsocket,youcanclosethe
computercaseandturnthecomputeron.YoujustneedtoentertheCPUSOFT
MENU™locatedintheBIOSSetup,andtosetup thespeedandthevoltageof
theCPUtocompetetheinstallation.Evenifyoudon’tneedtosetup anyswitch,
werecommendyoutoreadourpresentationoftheCPUs,itwill beuseful
informationforyou.
Since 1996,everytwoorthree months,Inteladdsnewmodelstothe
PentiumCPUseries.ThatiswhytheCPUmarketisfilledwithalotofdifferent
modelsandbrands.All CPUshavedifferentelectricalspecifications.That’swhy
installingaCPUisbecomingmoreandmorecomplex.Youcan’thelpthat,
becauseeverybodywantstobeabletoupgradeitshardware.So,youhaveto
takeabitoftimetoreadthissection,inordertobeabletoinstall acheaperand
betterprocessor.
TheAR5mainboarddoesnotonlysupportall theCPUslistedinthe
specifications,butalsohasreservedseveralcircuitsinordertobeabletosupport
futureprocessors.Butbeforewegofurtherinourpresentation,wemustclarify
that“wehaveonlytestedtheCPUslistedinChapter1”,wecannotguarantee
thatthisboardwill beabletosupportfutureproducts,becausewecannot
forecastfuturedevelopments.Butwewill doourbesttosupportanypossible
CPU.
Relatedterminology :
Externalclock
AlsoreferredtoastheexternalCPUclock,or“Busclock”,itistheinput
clockoftheCPU.Forinstance,IntelPentiumP90,P120 andP150 all have
a60MHzexternalCPUclock,buthavedifferentinternalclockmultiplier
factors.

2-12 Chapter2
Clockmultiplierfactor
TherealoperationclockwithintheCPUisthemultipleoftheexternal
clock.Werefertothisfactorastheclockmultiplierfactor.Thefourfactors
possibleare1.5,2,2.5and3.ThefactordiffersfromoneCPUtoanother.
Forinstance,theIntelPentium166 CPUhasa66MHzexternalclock,with
amultiplierfactorof2.5,sothatthespeedoftheinternalclockis66MHzx
2.5.
Internalclock
AlsoreferredtoastherealinternalCPUclock,itistheactualinternal
operatingclockoftheCPU.TheInternalClockisamultipleoftheexternal
clockandoftheclockmultiplierfactor.Forinstance,theIntelPentium90
CPUhasa60MHzexternalclockanditsclockmultiplierfactoris1.5;the
IntelPentiumP133 CPUhasa66MHzexternalclockanditsclock
multiplierfactoris2.
InternalCPUclock=clockmultiplierfactorxexternalCPUclock
ATBusclock
AlsoreferredtoasISASPEED,orATCLOCK,orevenISABusclock.
Tenyearsago,theoriginalspecificationofATBusclockinstalledinthe
firstgenerationPC/ATcomputerswas8MHz,thismeansthatthereare
someinterface cardswhichcanonlyworkat8MHz.Inordertoguarantee
compatibilitywitholderhardware,westill support8MHzATBusclock,
butifyourinterface cardisnewerorfaster,youcanchooseahigherspeed
fortheATBusclock,inordertoincreasethetransmissionrateofthe
interface cards.Butwerecommendyounottobetoo ambitious.An8MHz
setup ensuresmaximumcompatibility.
CPUVoltage-Vcoreand Vio
Fromthevoltagepointofview,586 seriesCPUcanbedividedintotwo
categories:singlevoltageCPUanddualvoltageCPUs.Singlevoltage
CPUsinclude:IntelPentiumP54Cseries,AMD-K5andCyrix6x86,etc.
DualvoltageCPUsinclude:IntelP55CwithMMX,futureAMDCPUs,
Cyrix6x86LandM2.
ThevoltageofdualvoltageCPUshastwocomponents:VcoreandVio.
Vcoreprovidesall thepowerforinternalprocessing,anditspower
consumptionisquiteimportant.Vioprovidesthepowernecessaryforthe
externalinterface oftheCPU.