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

HardwareConfiguration
ThischapterisabouthowtoconfigurethePR5.Thefirst
sectionisasummaryfortheexperienceduser.The sec-
ondexplainsthesamematerialindetail.If yourPR5is
alreadyinstalledinasystemyou canusethissection if
youneedtoreconfigurethe mainboard.
Configuration Quick Reference
Thissection providesasummaryofthe information
neededtoconfigurethePR5mainboardforinstallation.
PleaserefertothesectionPR5HardwareConfiguration
fordetailedinformation.
CPUConfiguration &Installation
ThePR5hasaSocket7ZeroInsertionForce(ZIF)socket.
ThereareseveralCPUconfiguration settingsrequired,
includingCPUvoltage,ExternalClockFrequencyand
ExternalClockFactor.DetailedCPUreferenceinforma-
tionisinSection4.
CPUVoltage
The following chartsshowthe CPUvoltage DIPswitch
settingsforIntel,AMDand CyrixCPUs.Referencein-
formation onrequired voltagesisinSection 4.
CPU Voltage Settings
You mustsetthe CPU voltage using
DIPswitch block VC1-8.The switches
arelabeledon theblock.The follow-
ingchartslistthesettings.
DefaultSetting :3.38V.
SeeSection4fordetailed informa-
tion on determining CPU voltage.
Section2
ConfigurationQuickReference
PR5HardwareConfiguration:
CPUConfiguration
MemoryConfiguration
L2CacheConfiguration
OnboardConnectors
DIP&JumperSummary
VCBlock
VCDIPSwitchBlockLocation
1 2 3 4 5 6 7 8 ONDIP

IntelPentiumCPU Vcore/VioSettings
Vcore/VioVC1VC2VC3VC4VC5VC6VC7VC8
2.7V/3.3VOFFOFFOFFOFFONOFFOFFON
2.8V/3.3VOFFOFFOFFONOFFOFFOFFON
2.93V/3.3VOFFOFFONOFFOFFOFFOFFON
3.38V/3.3VOFFONOFFOFFOFFOFFOFFON
3.52V/3.3VONOFFOFFOFFOFFOFFOFFON
Note: Thefactorydefaultsettingis3.38V.(VRE=3.52V,STD/VR=3.38V)
AMDAMD–K5CPUVcore/VioSettings
Vcore/VioVC1VC2VC3VC4VC5VC6VC7VC8
2.7V/3.38VOFFOFFOFFOFFONOFFONOFF
2.8V/3.38VOFFOFFOFFONOFFOFFONOFF
2.93V/3.38VOFFOFFONOFFOFFOFFONOFF
3.38V/3.3VOFFONOFFOFFOFFOFFOFFON
3.52V/3.3VONOFFOFFOFFOFFOFFOFFON
Note: The factorydefaultVcoresettingis3.38V.
Thevoltagefiguresshownarethemid-pointofarange,e.g.therangeof3.52Vis3.45Vto3.6V
Cyrix6x86 CPU Vcore/VioSettings
Vcore/VioVC1VC2VC3VC4VC5VC6VC7VC8
2.7V/3.3VOFFOFFOFFOFFONOFFOFFON
2.8V/3.3VOFFOFFOFFONOFFOFFOFFON
2.93V/3.3VOFFOFFONOFFOFFOFFOFFON
3.38V/3.3VOFFONOFFOFFOFFOFFOFFON
3.52V/3.3VONOFFOFFOFFOFFOFFOFFON
Note: Recommended setting for6x86 CPUs is3.52V/3.3V.
Thevoltagefiguresshownarethemid-pointofarange,e.g.therangeof3.52Vis3.45Vto3.6V

ExternalClock Settings
You mustsetthe correctexternal
clocksettings using DIPswitch block
DS1-8.The switches arelabeled on
theblock.Thesechartslisttheset-
tings.
DefaultSetting :Pentium133.
See Section4fordetailed CPUin-
formation.
ExternalClockFrequency&ExternalClockFactor
Thechartsinthissection showtheDIPswitchsettings
forboththeCPUexternalclockfrequencyandclock fac-
tor.OnlysomeoftheswitchesintheDSblockapplyto
thesesettings.
DSBlock
DS DIPSwitch BlockLocation
1 2 3 4 5 6 7 8 ONDIP
ImportantNote
The PR5 uses one ofseveralclock generatorchips.The DS DIPswitch block
settings varydepending on whichchipisinstalled.To determinethecorrect
settings youneedtoknowwhichclockchipisinstalled.Theposition ofthe
chipon themainboardisnoted above.The chippartinformation isprinted
on the top ofthe chip.The options are:
ICS:
ICS9159-14
PhaseLink:
PLL52C59-14TorPLL52C61-01orPLL52C61-21
These clockgeneratorchips supporta“Normal”and a“Turbo”mode.
Normal mode isthe CPU manufacturer’srated clock speed.Turbo mode is
anoverclockmodethatincreasestheCPU’sclockspeedby 2.5% over
theNormal rating.Formaximumstabilityand compatibilityyoushould
usetheNormal modefortheCPU you areinstalling.
ClockGeneratorChip

IntelPentiumCPUs
Clock Chip:PLL52C61-01orPLL52C61-21
Ext.Clock FactorExt.ClockFreq.:Normal/TurboISASpdRefresh
CPU:Ext/IntClockDS1DS2DS3DS4DS7DS5DS6
P75:50/75MHzOFFOFFON/–ON/–ON/–OFFOFF
P90:60/90MHzOFFOFFON/OFFON/OFFOFF/ONONOFF
P100:66/100MHzOFFOFFOFF/OFFON/OFFON/OFFONOFF
P120:60/120MHzOFFONON/OFFON/OFFOFF/ONONOFF
P133:66/133MHzOFFONOFF/OFFON/OFFON/OFFONOFF
P150:60/150MHzONONON/OFFON/OFFOFF/ONONOFF
P166:66/166MHzONONOFF/OFFON/OFFON/OFFONOFF
P200:66/200MHzONOFFOFF/OFFON/OFFON/OFFONOFF
ClockChip:PLL52C59-14TorICS9159-14
Ext.Clock FactorExt.Clock Freq.—(Norm/Turbo)ISASpdRefresh
CPU:Ext/IntClockDS1DS2DS3DS4DS7DS5DS6
P75:50/75MHzOFFOFFONONOFF/ONOFFOFF
P90:60/90MHzOFFOFFOFFONOFF/ONONOFF
P100:66/100MHzOFFOFFONOFFOFF/ONONOFF
P120:60/120MHzOFFONOFFONOFF/ONONOFF
P133:66/133MHzOFFONONOFFOFF/ONONOFF
P150:60/150MHzONONOFFONOFF/ONONOFF
P166:66/166MHzONONONOFFOFF/ONONOFF
P200:66/200MHzONOFFONOFFOFF/ONONOFF
Note:
ICS9159-14doesnotsupport Turbomodeat75MHz
ISASpd.–ISABus Clock speed,see page 2-19
Refresh –DRAMrefresh [reserved forfutureuse]always OFF
DS8 –reserved forfutureuse,alwaysOFF

AMD–K5 CPUs(AMD-SSA/5&AMD-K5)
Clock Chip:PLL52C61-01orPLL52C61-21
Ext.Clock FactorExt.ClockFreq.:Normal/TurboISASpdRefresh
CPU:Ext/IntClockDS1DS2DS3DS4DS7DS5DS6
PR75:50/75MHzOFFOFFON/—ON/—ON/—OFFOFF
PR90:60/90MHzOFFOFFON/OFFON/OFFOFF/ONONOFF
PR100:66/100MHzOFFOFFOFF/OFFON/OFFON/OFFONOFF
PR120:60/90MHzOFFOFFON/OFFON/OFFOFF/ONONOFF
PR133:66/100MHzOFFOFFOFF/OFFON/OFFON/OFFONOFF
PR150:60/120MHzOFFONON/OFFON/OFFOFF/ONONOFF
PR166:66/133MHzOFFONOFF/OFFON/OFFON/OFFONOFF
ClockChip:PLL52C59-14TorICS9159-14
Ext.Clock FactorExt.Clock Freq.—(Norm/Turbo)ISASpdRefresh
CPU:Ext/IntClockDS1DS2DS3DS4DS7DS5DS6
PR75:50/75MHzOFFOFFONONOFF/ONOFFOFF
PR90:60/90MHzOFFOFFOFFONOFF/ONONOFF
PR100:66/100MHzOFFOFFONOFFOFF/ONONOFF
PR120:60/90MHzOFFOFFOFFONOFF/ONONOFF
PR133:66/100MHzOFFOFFONOFFOFF/ONONOFF
PR150:60/120MHzOFFONOFFONOFF/ONONOFF
PR166:66/133MHzOFFONONOFFOFF/ONONOFF
Note:
ICS9159-14doesnotsupport Turbomodeat75MHz
ISASpd.–ISABus Clock speed,see page 2-19
Refresh –DRAMrefresh [reserved forfutureuse]always OFF
DS8 –reserved forfutureuse,alwaysOFF

Cyrix6x86 CPUs
Clock Chip:PLL52C61-01orPLL52C61-21
Ext.Clock FactorExt.ClockFreq.:Normal/TurboISASpdRefresh
CPU:Ext/IntClockDS1DS2DS3DS4DS7DS5DS6
P120+:50/100MHzOFFONON/—ON/—ON/—OFFOFF
P133+:55/110MHzOFFONON/—OFF/—ON/—ONOFF
P150+:60/120MHzOFFONON/OFFON/OFFOFF/ONONOFF
P166+:66/133MHzOFFONOFF/OFFON/OFFON/OFFONOFF
P200+:75/150MHzOFFONON/—OFF/—OFF/—ONOFF
ClockChip:PLL52C59-14TorICS9159-14
Ext.Clock FactorExt.Clock Freq.—(Norm/Turbo)ISASpdRefresh
CPU:Ext/IntClockDS1DS2DS3DS4DS7DS5DS6
P120+:50/100MHzOFFONONONOFF/ONOFFOFF
P133+:55/110MHzOFFONOFFOFFOFF/—ONOFF
P150+:60/120MHzOFFONOFFONOFF/ONONOFF
P166+:66/133MHzOFFONONOFFOFF/ONONOFF
P200+:75/150MHzOFFONOFFOFFON/—ONOFF
Note:
ICS9159-14doesnotsupport Turbomodeat75MHz
ISASpd.–ISABus Clock speed,see page 2-19
Refresh –DRAMrefresh [reserved forfutureuse]always OFF
DS8 –reserved forfutureuse,alwaysOFF

DRAMInstallation
The PR5hasnumerouspossiblesystemmemoryconfigu-
rationsusingthe four72-pinSIMMsocketsand thetwo
168-pinDIMM sockets.TheSIMMsocketsworkinbanks
oftwotoprovidea64-bitdatapath.SIMM1/SIMM2are
onebank,SIMM3/SIMM4areanother.The DIMM sock-
etsareeachabank,foratotaloffourbanks.Pleasenote
thefollowing.
•Installedmemoryisauto-detected bytheBIOS
•Minimuminstallation 2SIMMsor1DIMMmod-
ulefora64-bitdatapath
•FastPage (FP),EDOand SDRAMareall supported,
SDRAMonlyinDIMMmodules
•SIMMs:singleordouble-sided modulesof4MBand
up supported
•DIMMs:singleordouble-sidedmodulesof8MB
andupsupported
•DIMM socketssupportboth5-volt(FPorEDO)
and3.3-volt(Unbuffered)DRAM;voltage forboth
socketsissetbyjumperJP11(seenextpage)
•PairsofSIMMsmustbethe samememorytype,
sizeandspeed butthetypeandsizeofasecond
paircan bedifferent
•MemoryBanks:
SIMM1&SIMM2
SIMM3&SIMM4
DIMM1
DIMM2
•Banksequencedoesn’tmatter,useanycombina-
tion aslong asotherrequirementsarefollowed
•DRAMspeed mustbe atleast70ns,canbefaster
•Paritychecking isnotsupported
•Maximum128MBsupported
Therearenumerousallowablememoryconfigurations.
Sincebanksequenceisnotimportant,aslongasyouuse
SIMMsinpairsyou can useanycombination ofbanks.
However,formaximumperformanceitbesttousethe
sametypeofDRAMinallbanksinstalled.SDRAMpro-
videshigherperformancethanEDODRAMandEDOis
fasterthan FastPage Mode DRAM.
ImportantNote:
Double-sided Modules
Thereisanimportantlimitationinus-
ingdouble-sidedSIMMorDIMMmod-
ules.Double-sided modules inone bank
preventsthe use ofacorresponding
bank ofthe othertype ofmodule.For
example:
•Ifbank SIMM1/2has2-sidedmod-
ules installed,youcannotuse the
DIMM2socket.
•Ifbank SIMM3/4has2-sidedmod-
ules installed,youcannotuse the
DIMM1socket.
•Ifbank DIMM1has a2-sided module
installed,youcannotusethe SIMM3/
4sockets.
•IfbankDIMM2hasa2-sidedmodule
installed,youcannotuse the SIMM1/
2sockets.
Double-sidedmodulesaremoduleswith
memorychips mounted onbothsides.
!

DIMM VoltageSettings
TheDIMMsocketssupportboth5-voltand3.3-voltun-
bufferedDRAM.Thevoltage setting forbothDIMM
socketsiscontrolledbyjumperJP11.Thesocketvoltage
settingmustmatchthevoltageoftheDRAMonany
DIMMmodulesyouinstall.The jumpersettingsare
shownbelow.
x
x
x
DIMMVoltage Settings
JumperJP11setsthe voltage sup-
plied tothe DIMM sockets.FP&EDO
modulesusethe 5-Voltsetting.
DefaultSetting :3-Volt.
JP11:DIMMVoltagePins1-2Pins 2-3
5-VoltDIMMShortNA
3-VoltDIMMNAShort[Default]
Note:
5-Volt=FPorEDODRAM
3-Volt=3.3-VoltUnbufferedDRAM
JP11
JumperJP11Location
Pin1
!

OnboardConnectors
ThePR5hasonboardconnectorheadersforthediskcon-
trollers,I/Oports,systemenclosureconnectionsandsev-
eralotherfeatures.Pin1locationsarenotedforcableori-
entation.
DriveController&I/OPortConnectors
ThePR5hasfloppydiskdrive,Enhanced IDEcontroller,
serial,parallelandUSBportconnectorheadersonboard.
Drive ControllerConnectors
The FloppyDisk DriveControllerconnectorisa34-pin
header.ThetwoEnhancedIDEControllerconnectorsfor
Channel1andChannel2are40-pinheaders.Ribbon
cablesaresuppliedforeachconnector.When installing
drives,makesurethe colored edgeofthedrive’sribbon
cableisatthe Pin1end ofthe boththeonboardconnec-
torandthedrive.TheirpositionsandPin1locationsare
shownbelow.
FDC
IDE1IDE2ControllerConnectorLocations

I/OPortConnectors
The PR5hastwoserial,one parallel,aconnectorforan
IrDA-compatibleInfraredportandadual-portUSB con-
nectoronboard.Combination ribbon cabletoexternal
portcablesaresupplied foreachconnectorexceptthe
Infraredport.Wheninstallingports,makesurethe col-
ored edgeoftheribboncableisatthe Pin1endofthe
onboardconnector.TheirpositionsandPin1locations
areshownbelowandthepinassignmentsfortheInfra-
redandUSBportsareshowninthetableonpage2-11.
I/OPortConnectors
Therearefiveconnectors:
JP2:Infrared port (5-pin)
USB:USBports(16-pin)
COM1:COM1serialport(10-pin)
COM2:COM2serialport (10-pin)
LPT:LPT1printerport(26-pin)
Pin1 :Upperleft-handcornerfor
USB,upperright-hand cornerfor
COM&LPTasshownatright.
USB
COM1COM2
LPT
I/OPortConnectorLocations
xxxxx
JP2IRConnector
Pin1
ConnectorSummary
Name#PinsFunction
IDE140IDEChannel1connector
IDE240IDEChannel2connector
FDC34Floppy Diskconnector
LPT26ParallelPortconnector
COM110Serial PortCOM1connector
COM210SerialPort COM2connector
USB16Universal Serial Busconnector