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.