Abit PR5 Informations techniques

FCC InformationFederal Communications Commission Radio Frequency Interference StatementThis equipment has been tested and found to comply with the lim

System Block Diagram

Hardware ConfigurationThis chapter is about how to configure the PR5. The firstsection is a summary for the experienced user. The sec-ond explains the

Intel Pentium CPU Vcore/Vio SettingsVcore/Vio VC1 VC2 VC3 VC4 VC5 VC6 VC7 VC82.7V/3.3V OFF OFF OFF OFF ON OFF OFF ON2.8V/3.3V OFF OFF OFF ON OFF OFF O

External Clock SettingsYou must set the correct externalclock settings using DIP switch blockDS1-8. The switches are labeled onthe block. These charts

Intel Pentium CPUsClock Chip: PLL52C61-01 or PLL52C61-21Ext. Clock Factor Ext. Clock Freq.: Normal/Turbo ISA Spd RefreshCPU:Ext/Int Clock DS1 DS2 DS3

AMD–K5 CPUs (AMD-SSA/5 & AMD-K5)Clock Chip: PLL52C61-01 or PLL52C61-21Ext. Clock Factor Ext. Clock Freq.: Normal/Turbo ISA Spd RefreshCPU:Ext/Int

Cyrix 6x86 CPUsClock Chip: PLL52C61-01 or PLL52C61-21Ext. Clock Factor Ext. Clock Freq.: Normal/Turbo ISA Spd RefreshCPU:Ext/Int Clock DS1 DS2 DS3 DS4

DRAM InstallationThe PR5 has numerous possible system memory configu-rations using the four 72-pin SIMM sockets and the two168-pin DIMM sockets. The S

DIMM Voltage SettingsThe DIMM sockets support both 5-volt and 3.3-volt un-buffered DRAM. The voltage setting for both DIMMsockets is controlled by jum

Onboard ConnectorsThe PR5 has onboard connector headers for the disk con-trollers, I/O ports, system enclosure connections and sev-eral other features

Version 1.01Copyright © September 1996 All rights reservedThis publication may not be copied, reproduced, translated, transmitted or reduced toany pri

I/O Port ConnectorsThe PR5 has two serial, one parallel, a connector for anIrDA-compatible Infrared port and a dual-port USB con-nector onboard. Combi

Infrared & USB Port ConnectorsPin FunctionIR PortPin 1 +5-Volts DCPin 2 Not usedPin 3 Receive DataPin 4 GroundPin 5 Transmit DataUSB Ports: USB 1

System Enclosure ConnectorsThe system enclosure (case) connections are in a headerblock which includes the Hardware Reset, SuspendSwitch, Turbo LED, S

Enclosure Features Connector BlockFeature Pin FunctionHardware Reset ConnectorPin 1 GroundPin 2 Reset signalSuspend Switch ConnectorPin 6 GroundPin 7

Other ConnectorsThere are several other connectors on the PR5, includingthe power input, keyboard, PS/2 mouse, IDE LED activ-ity light and CPU fan con

Other Onboard ConnectorsPin FunctionPower Input Connector J1Pin 1 PowergoodPin 2 +5-Volts DCPin 3 +12-Volts DCPin 4 –12-Volts DCPin 5 GroundPin 6 Grou

PR5 Hardware ConfigurationThis section describes how to configure the PR5 main-board hardware in more detail than the ConfigurationQuick Reference at

In Pentium-based designs there is more than oneclock speed. The mainboard components run at onespeed and the CPU will run at the same speed inits exte

CPU Voltage – Vcore & VioThe CPU input voltage has two components, Vcoreand Vio. Vcore provides the power for internal pro-cessing and Vio for the

DS BlockVC BlockDS & VC DIP Switch Block LocationsDS5 ISA Bus Clock SettingsExternal Clock DS5 Bus Clock50Mhz On 6.25MHzOff 8.33MHz60MHz On 7.5MHz

ContentsIntroduction...

Intel Pentium CPU Clock Multiplier FactorClock Factor DS1 DS2 Clock Factor x External Clock=Internal Clock Speed (in MHz)1.5 OFF OFF 1.5x50=75; 1.5x60

Intel Pentium CPUsClock Chip: PLL52C61-01 or PLL52C61-21Ext. Clock Factor Ext. Clock Freq.: Normal/Turbo ISA Spd RefreshCPU:Ext/Int Clock DS1 DS2 DS3

AMD K5 CPU Clock Multiplier FactorClock Factor DS1 DS2 Clock Factor x External Clock=Internal Clock Speed (in MHz)1.5 OFF OFF 1.5x50=75*; 1.5x60=90*;

AMD–K5 CPUs (AMD-SSA/5 & AMD-K5)Clock Chip: PLL52C61-01 or PLL52C61-21Ext. Clock Factor Ext. Clock Freq.: Normal/Turbo ISA Spd RefreshCPU:Ext/Int

Cyrix 6x86 CPU Clock Multiplier FactorClock Factor DS1 DS2 Clock Factor x External Clock=Internal Clock Speed (in MHz)2 OFF ON 2x50=100 (P120+); 2x55=

Cyrix 6x86 CPUsClock Chip: PLL52C61-01 or PLL52C61-21Ext. Clock Factor Ext. Clock Freq.: Normal/Turbo ISA Spd RefreshCPU:Ext/Int Clock DS1 DS2 DS3 DS4

System Memory ConfigurationThe PR5 is designed to provide the broadest possiblememory configuration options. The design includes foursockets for the c

The PR5 has numerous possible system memory configu-rations using the four 72-pin SIMM sockets and the two168-pin DIMM sockets. Please note these guid

PR5 Memory Configuration ExamplesSIMM1/2 SIMM3/4 Total4MB/4MB 8MB8MB/8MB 16MB16MB/16MB 32MB32MB/32MB 64MB64MB/64MB 128MB4MB/4MB 4MB/4MB 16MB8MB/8MB 16

DIMM Voltage SettingsThe DIMM sockets support both 5-volt and 3.3-volt un-buffered DRAM. The voltage setting for both DIMMsockets is controlled by jum

JP3: Clear CMOS Memory...

Installing Memory ModulesInstalling memory modules is easy, but there are a fewimportant precautions you should take whether you areinstalling SIMM or

Installing DIMMsTo install any kind of DIMM module do as follows:1. Orient the short section of the edge connector sothat it is at the upper end of th

PR5 Level 2 Cache Configuration SettingsOnboard Module Total JP1 Setting0KB 0KB 0KB OFF256KB 256KB OFF256KB 256KB OFF256KB 256KB 512KB ON512KB 512KB O

Onboard ConnectorsThere are several connectors for various features on themainboard. If your PR5 is already installed in a system,you can skip this se

The two Enhanced IDE Controller connectors are for thetwo IDE channels Channel 1 and Channel 2. Channel 1is the Primary channel and is divided in two

System Enclosure ConnectorsThe system enclosure is your system case. There are usu-ally several features built-in to the case that connect tothe mainb

AT Keyboard & PS/2 Port Pin AssignmentsPin FunctionAT KeyboardPin 1 Keyboard ClockPin 2 Keyboard DataPin 3 Not usedPin 4 GroundPin 5 +5-Volts DCPS

IDE Activity LED ConnectorThe IDE activity LED connector is a 4-pin connectorwhich will accept either a 2-pin or 4-pin IDE LED activ-ity light connect

DIP Switch & Jumper SummaryThis section lists the function of all the DIP switches andjumpers on the board for your reference.DIP Switch & Jum

Other Jumper FunctionsThere are two other jumpers on the PR5 which have notbeen mentioned yet. One is JP3 (Clear CMOS Memory)and the other is JP8 (Fla

IntroductionThis manual has the information you will need to install,configure and use your PR5 mainboard. This section cov-ers manual features, what

JP8: Flash ROM TypeThis jumper is set at the factory for the type of Flash ROMchip installed. You should not change the setting and it isshown here fo

Technical InformationThis section covers three topics:• CPU SpecificationsDetailed information on CPU specifications to helpyou identify precisely the

Intel CPUsThis section lists the specifications for Intel PentiumCPUs. The following tables use some abbreviations asfollows:PowerSTD – 3.15V ~ 3.465V

Software ConfigurationThis section explains the information you need to knowto establish your systems basic configuration and cus-tomized settings an

After you press the Del key the program menu screenwill appear, displaying the various sections of the Setuputility and some commands.LOAD SETUP DEFAU

CMOS Memory Battery SupportThe Setup program’s configurationrecord is stored in CMOS memory whichis maintained by a battery backup. Ifthe record is lo

Standard CMOS SetupTo enter this section of the Setup program, highlight thismenu item in the main menu and press the Enter key.The following screen w

ModifyTo change the setting of a highlighted selection youcan press either the Page Up (PU) and Page Down(PD) keys or the Plus (+) and Minus (–) keys.

Large Hard Disk ModesThe last of the drive parameter entries – Mode – has threeoptions, Normal, LBA and Large. The Mode settings arefor IDE hard disks

Floppy 3Mode Support3Mode is a Japanese 3.5-inch floppy disk drive specifica-tion. If this type of drive is installed you should enablethis feature. T

Package ContentsIf your PR5 is already installed in a system you can skipthis section. If you are installing the PR5 yourself, pleasecheck and make su

BIOS Features SetupTo enter this section of the Setup program, highlight thismenu item in the main menu and press the Enter key.The following screen w

ModifyTo change the setting of a highlighted selection youcan press either the Page Up (PU) and Page Down(PD) keys or the Plus (+) and Minus (–) keys.

Quick Power On Self TestThis feature speeds up the Power On Self Test (POST) byskipping some parts of the POST. If your system is func-tioning normall

IDE HDD Block ModeThis mode improves performance by making multi-sec-tor transfers from the hard disk instead of one sector pertransfer. Older IDE dri

OS Select For DRAM >64MBIf your system has more than 64MB of system memoryinstalled and you are using the OS/2 operating system,set this to the OS2

Chipset Features SetupTo enter this section of the Setup program, highlight thismenu item in the main menu and press the Enter key.The following scree

** Power Down & Resume Event **IRQ3 (COM 2) : ONIRQ4 (COM 1) : ONIRQ5 (LPT 2) : ONIRQ6 (Floppy Disk) : ONIRQ7 (LPT 1) : ONIRQ8 (RTC Alarm) :

Power ManagementThis controls the entire power management scheme.There are four settings:User DefinedYou set the power saving options manuallyDisable

Video Off OptionThis governs in what modes the video display gets turnedoff. The options are:Susp,Stby-> Off (Off in Suspend & Standby)Susp->

HDD Power DownThis shuts down IDE hard disks that support a powersaving mode after a specified time period. The settingsrange from 1 to 15 minutes an

The PR5’ s feature list includes:CPU Support – Socket 7 ZIF socket for Pentium and com-patible CPUs as follows:• Intel Pentium 75 – 200MHz CPUs• AMD A

PCI & Onboard I/O SetupTo enter this section of the Setup program, highlight thismenu item in the main menu and press the Enter key.The following

PCI IDE Card 2nd ChannelThis turns the onboard IDE controller’ s second channelon and off. If you disable this it makes IRQ15 availableto the ISA expa

Onboard IDE-1 ControllerThis turns the onboard IDE controller’ s Primary channelon and off. The default is Enabled. The two sub-itemsset the PIO trans

IR Infrared SettingsThe next three items configure Serial Port 2 as an Infra-red port as follows:Onboard IR FunctionThis sets the IR mode. The options

STANDARD CMOS SETUPBIOS FEATURES SETUPCHIPSET FEATURES SETUPPOWER MANAGEMENT SETUPPCI & ONBOARD I/O SETUPLOAD BIOS DEFAULTSLOAD SETUP DEFAULTSPASS

STANDARD CMOS SETUPBIOS FEATURES SETUPCHIPSET FEATURES SETUPPOWER MANAGEMENT SETUPPCI & ONBOARD I/O SETUPLOAD BIOS DEFAULTSLOAD SETUP DEFAULTSPASS

STANDARD CMOS SETUPBIOS FEATURES SETUPCHIPSET FEATURES SETUPPOWER MANAGEMENT SETUPPCI & ONBOARD I/O SETUPLOAD BIOS DEFAULTSLOAD SETUP DEFAULTSPASS

IDE HDD Auto DetectionWhen you install an IDE hard drive, you should use thisfeature to automatically detect the drive parameters andenter them in the

Technical InformationThis section covers three topics:• CPU SpecificationsDetailed information on CPU specifications to helpyou identify precisely the

Intel CPUsThis section lists the specifications for Intel PentiumCPUs. The following tables use some abbreviations asfollows:PowerSTD – 3.15V ~ 3.465V

PR5 Mainboard Layout Key1. ISA Bus Expansion Slots2. PCI Bus Expansion Slots3. USB Port Connector4. Floppy Disk Drive Controller Connector5. IDE Contr

75MHz PentiumCPU Internal Bus External Power CPU DP CPUType Spec. Clock Factor Clock Vcore/Vio Timing Supp. Step CommentP54CS Q0649 75MHz 1.5 50MHz ST

100MHz PentiumCPU Internal Bus External Power CPU DP CPUType Spec. Clock Factor Clock Vcore/Vio Timing Supp. Step CommentP54C Sx888 100MHz 1.5 66MHz S

120MHz PentiumCPU Internal Bus External Power CPU DP CPUType Spec. Clock Factor Clock Vcore/Vio Timing Supp. Step CommentP54CS Sk110 120MHz 2 60MHz ST

133MHz PentiumCPU Internal Bus External Power CPU DP CPUType Spec. Clock Factor Clock Vcore/Vio Timing Supp. Step CommentP54CS Q0772 133MHz 2 66MHz ST

150MHz PentiumCPU Internal Bus External Power CPU DP CPUType Spec. Clock Factor Clock Vcore/Vio Timing Supp. Step CommentP54CS Q0835 150MHz 2.5 60MHz

166MHz PentiumCPU Internal Bus External Power CPU DP CPUType Spec. Clock Factor Clock Vcore/Vio Timing Supp. Step CommentP54CS SY016 166MHz 2.5 66MHz

AMD K5 CPUsThe diagram below shows how to interpret AMD CPUmarkings to determine CPU type.AMD – K5 – PR100 A B Q xx100MHzInternal Clock SpeedCPU M

Cyrix CPUsThe diagram below shows how to interpret Cyrix CPUmarkings to determine CPU type.6x86 – P166+ GP133MHzInternal Clock Speed (Core Frequency)

IDE Installation GuideThis section is a guide to installing IDE devices in yourcomputer system. It covers installing devices you con-nect to the mainb

Installing IDE DevicesThe Enhanced IDE controller on the PR5 supports fourdevices in two channels, IDE1 and IDE2, which are alsoreferred to as the Pri

AB–PR5 PCI Mainboard Layout12345678PB SRAMPB SRAM438VX438VX82437VX82371PIIX3PentiumCPUUltraIO910111213141516

Example 1: One Hard DiskTo install this configuration:1. Make sure the drive is configured as a master drive.Most drives are set this way at the facto

Example 3: Two Hard DisksTo install this configuration:1. Make sure one drive is configured as a Master driveand the other as a Slave drive. Most driv

7. Use the BIOS CMOS Setup Utility to enter the driveparameters for the Primary Master and PrimarySlave as described in the Standard CMOS Setupsectio

Example 6: Three Hard Disks & One CD-ROM DriveTo install this configuration:1. Make sure two hard disks are configured as Mas-ter drives and the o

BIOS SetupWhen you install hard disk drives you must enter theirparameters in the Standard CMOS Setup section of theBIOS CMOS Setup Utility as explain

Technical SupportIn order to help solve any problems that might arise inthe course of using your PR5 mainboard we have includeda few troubleshooting g

You can then use a text editor to deactivate the soundcard driver in the CONFIG.SYS file. To do this, you mustfind the line in the CONFIG.SYS file tha

Troubleshooting Form1. Product Model:2. Product Revision Number:3. BIOS ID#:4. Driver Revision:5. Operating System & Installed Applications:6. CPU