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The information presented in this publication has beencarefully checked for reliability; however, noresponsibility is assumed for inaccuracies.

Specifications are subject to change without notice.

Trademarks

IBM, PC/AT, and PC/XT are trademarks ofInternational Business Machines Corporation.

Intel and Pentium are trademarks of Intel Corporation.

AMD is a trademark of Advanced Micro Devices Inc.

Cyrix is a trademark of Cyrix Corporation.

IDT is a trademark of Integrated Devices TechnologyCorporation.

AMI is a trademark of American Megatrends Inc.

MS-DOS and WINDOWS NT are registered trademarksof Microsoft Corporation.

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ii

Contents

245

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999

88899

99

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11

1212

1212

1313

13

1414141414

14

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iii

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2020

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212121222425272930313131

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Chapter 1

Introduction

Thismainboard is a high-performance mainboardbased on the advanced Pentium microprocessor andfeaturing PCI Local Bus and the high-end chipset. Themainboard offers a high degree of flexibility inconfiguration and is fully IBM PC/AT compatible.

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2 Chapter 1

Key Features

The advanced features of this mainboard include:

66MHz Advanced Graphic Port

Supports either P54C/P55C Pentium (MMX)CPUs with 321-pin ZIF socket and Cyrix/IBM6x86L/6x86MX (M2), AMD K6, IDT C6 Processorswith External Clock Speed at 50/55/60/66/75/83MHz;

Supports 3 banks of FP/EDO SIMM/DIMM andSDRAM DIMM expandable memory up to 384MB;

Four 72-pin SIMM sockets and two 168-pin DIMMsockets;

Supports 64M-bit (16Mx4, 8Mx8, 4Mx16)technology DRAM/SDRAM;

Supports onboard 64-bit 512KB L2 cache;

Provides dual 20-pin ATX power connector and AT12-pin power connector, and ATX power supportModem Ring On & Suspend Switch;

Supports both ACPI and Legacy PMU;

4 PCI Local Bus slots and 3 16-bits ISA Bus slots, all4 PCI slots support master mode;

Supports Ultra DMA/33, PCI Bus Master IDEinterface onboard with 2 connectors which support4 IDE devices in 2 channels; the PCI IDE controllersupports PIO Mode 0 to Mode 4 and UltraDMA/33 at maximum transfer rate of 33MB/s and

Bus Master IDE DMA Mode 2; System BIOS supports 4 IDE hard disk drives

which do not need device driver for S/Wapplication and the capacity of each hard disk canbe larger than 528MB and up to 8.4 GB;

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Onboard super Multi -I/O chip supports 2 serial portswi th 16550 fastUART compatible, 1 parallel port with EPP and ECP capabili ties, andone fl oppy disk drive interface;

System BIOS supportsGreenfeaturefunction and "Plug & Play" FlashROM;

SupportsPS/2 Mousepin header;

high performance64-bit GUI accelerator with excell ent videoplayback capability,systemmemory sharesup to 4MB with videobuffer,high resolution graphic modes640x480/800x600/1024x768;

Sound Blaster 16/PROcompatible with stereo voiceup to 48KHzsampling rates,HRTF3D Positi onal Audio Technology,Windows SoundSystemver 2.0 compatible,Windows 95/31 and DOSdrivers supported,AcceleratesDirect Sound 3D in Win95,Device supports: SB16, WSS, Game,HSP-23 Wavetable synthesizer,Full Duplex 16-bits CODEC with fi lters,High quali ty 3D sound(ON/OFF controllable),Auto switch thehardware between Windows Sound System andSoundBlaster16,

Stereo Mixer supports analog mixing form CD-Audio, Line-In,supports digital mixing from Voice, FM/Wave-table and digitalCD-Audio,Supports44.1K digi tal audio(SPDIF)I N.

Introduction 3

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Chapter 14

This mainboard packagecontains thefoll owing items:1. Themainboard2. Thedevice driver for this mainboard3. This user's guide

4. Sound & Game ribbon cables/bracket5. ATX FormCard (optional)

Themainboard is easil y damaged by staticelectricity. Foll ow theprecautions below whil eunpacking or installi ng themainboard.1. Do not removethemainboard from its original

packageuntil you are ready to install it.2. Before handli ng themainboard, ground yourself by

grasping an unpainted portion of thesystem'smetal chassis.

3. Frequently ground yourself to discharge any staticelectric chargethat may buil d up in your bodywhile working on installation and/or configuration.

4. Remove themainboard from its anti-staticpackaging and placeit on a grounded surface,component sideup.

5. Handle themainboard by its edges or by themounting bracket to avoid touching its components.

6. Check the mainboard for damage. If any integratedcircuit appears loose, press carefull y to seat it fi rmlyin its socket.

7. Makesurethat JP2 is set to Normal mode(pin 1-2)

8. Do not apply power if the mainboard appearsdamaged. If there is damageto theboard contact yourdealer immediately.

Unpacking & Static Electricity Precautions

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Chapter 2

Hardware Configuration

Before you install thismainboard into the systemchassis, you may find it convenient to first configurethe mainboards hardware. This chapter describes howto set jumpers and install memory modules, and whereto attach components.

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Mainboard Component Locations

Figure 2-1. Mainboard Component Locations

J5

J4

J6

JP10

JP9

PCI1

COM1

PRN

SIMM1

FDC

IDE1 IDE2

DIMM1 DIMM2SIMM2SIMM3

Version

SIMM4

COM2 PS2

PCI2PCI3PCI4

VGA

PWR1

PWR2

KBD

J7

JP2

J1

12V

4

5

5V

3.3V

1

11

11

1

1

1

1

1

1 1

1

1

1

1 1

1

GAME

G

J2

JP8

JP4

JP3

JP5

AB

JP7

ABC

JP6 ABCD

+

Chapter 26

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Hardware Configuration 7

Connectors

Attach system components and case devices to the

mainboard via the mainboard connectors. A descriptionof each connector and its connector pins follows. SeeFigure 21 for the location of the connectors on themainboard.

Note: Make sure that the power is turned off before makingany connection to the board.

PWR1 Power Supply ConnectorsThe power supply connectors are two six-pin maleheader connectors. Plug the dual connectors from thepower directly onto the board connectors. Most ofpower supply have two leads and each lead has sixwires. Two of which are black, orient the connectors sothat the black wires are in the middle.

Pin Description Pin Description

1 Power Good 7 Ground

2 +5V DC 8 Ground

3 +12V DC 9 5V DC

4 12V DC 10 +5V DC

5 Ground 11 +5V DC

6 Ground 12 +5V DC

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8 Chapter 2

PWR2 ATX Style Power Connector

The ATX power supply provides a single 20-pin

connector.

Pin Description Pin Description

1 3.3V 11 3.3V

2 3.3V 12 12V

3 Ground 13 Ground

4 +5V 14 PS-ON

5 Ground 15 Ground6 +5V 16 Ground

7 Ground 17 Ground

8 Power OK 18 5V

9 5VSB 19 +5V

10 +12V 20 +5V

Software Power-Off

Follow the steps below to use the Software Power-OffControl function in Windows 95.

1. Click the START button on the Windows 95 taskbar.

2. Select Shut Down The Computer to turn off the

Th It i f t t ff

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Monitor and theRing Active option is set to Enabled in

theBIOSsetup section (Refer to thePower

Management section in Chapter 3.)

VGA - VGA Connector

COM1/2 - Serial Port # 1/# 2

PRN - Parallel Port

FDC - Floppy Disk Port

IDE1/IDE2 - Peimary/Secondary IDE Ports

PS2 - PS/2 Mouse Pin Header

KBD - Keybord Connector

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

R

G

B

NC

Ground

Ground

Ground

Ground

Vcc

Ground

NC

DDC DATA

H SYNC

V SYNC

DDC CLK

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Chapter 210

1

2

3

4

5

6

15

16

7

8

9

1718

10

11

12

13

+5VDC

Data -

Data +

Ground

+5VDC

Mouse CLK

Mouse Data

Ground

Ground

Reserved

+5VDC

IRInIR Out

+5VDC

Data -

Data +

Ground

(5-6,15-16) - PS/2 Mouse

(7-9,17-18) - Infrared

J7 - ATX FORM CARD Connector(1-4,10-13) - 2 sets of Universal Serial Bus (USB)

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J3 (KEY LOCK) Keylock & Power LEDConnector

Keylock connector enables and disables the keyboardkey-in function on the case.

Pin Description

1 LED Output

2 N.C.

3 Ground

4 Keylock 5 Ground

J3 (TB-LED) Turbo LED Connector

Pin Description

+ Anode Ground

J3 (RST) Reset Switch Connector

Attach the Reset push button cable to this connector.

Setting Description

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12 Chapter 2

J3 (STANDBY LED) Standby LEDConnector

Pin Description

+ Anode

Ground

J3 (SPK) Speaker Connector

Pin Description

1 Data Out

2 N.C.

3 Ground

4 +5V

J3 (HDD-LED) HDD LED Connector

Pin Description

+ +5V

Active Low

J2 (FAN-POW) Fan Power

Pin Description

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14 Chapter 2

Jumper Settings

JP2 - CMOS RAM Clear Selector

Notice: This jumper is set on the "Clear CMOS" position

when the mainboard is shipped and you need to set it to

the "Normal" position in order for the mainboard

perform properly.

1

3

SettingDescription

Normal Mode

Clear CMOS1

3

JP4 - DIMM VoltageSelectors

5V

3.3V

SettingVoltage

5V

3.3V5V

3.3V

JP5 (A,B,C,D) - CPU External Clock Selectors

1

1

1

1

1

A B C D

SettingFre.

50MHz

A B C D

55MHz

A B C D

60MHz

A B C D

SettingFre.

66MHz

A B C D

75MHz

JP3 - Internal VGA

Selector

1

SettingDescription

Disable

Enable1

1

A B C D

83MHz

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JP6 - CPU Core Voltage Selectors

Setting Setting

Core Vcc Setting Core Vcc Setting

2.2V 3.2V

2.8V 3.3V

2.9V 3.5V

4.0X

2.0X 4. 5X

2.5X 5.0X

3.0X 5.5X

1.5X /

3.5X

1

A B C

1

A B C

1

A B C

1

A B

1

A B C

1

A B C

1

A B C

1

A B C

1

A B C

Note: The CPU speed is equal to CPU External Clock xCPU Internal Clock Speed.

Internal Internal

1

A B C

Note: The origina l jump er sett ing is for 2.5V. Now, it is chan gedint o 2.2V,if the re is a "BLACK LABEL" located a roun d th is jum p.

CPU Setting Example

P54C(Single Voltage)

P55C(Single Voltage)

1

A B

Intel P54C, IDT C6

Intel MMX ,TM

AMD K6,IBM/Cyrix6x86L/6x86MX(M2)

15

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16 Chapter 2

Memory Installation

The mainboard lets you add up to 384MB of system

memory through SIMM and DIMM sockets on theboard. Four SIMM sockets on the mainboard aredivided into two banks: Bank 0 and Bank 2. Each bankconsists of two 72-pin SIMM modules, and two 168-pinDIMM sockets are divided into two banks: Bank 0 andBank 1. The mainboard supports the followingmemory configurations, however, the manufacturedoes not recommend the mixed mode DRAM usage.

SIMM 1&2 SIMM 3&4 DIMM1 DIMM2 TotalMemory

4MB x 2 None None None 8MB




None None 8MB None 8MBNone None 16MB None 16MB

None None 32MB None 32MB

None None 64MB None 64MB

4MB x 2 4MB x 2 None None 16MB




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SIMM 1&2 SIMM 3&4 DIMM1 DIMM2 TotalMemory

8MB x 2 None None 8MB 24MB8MB x 2 None None 16MB 32MB

8MB x 2 None None 32MB 48MB













32MB x 2 32MB x 2 None None 128MB32MB x 2 None None 8MB 72MB




None 32MB x 2 8MB 8MB 80MB

None 32MB x 2 16MB 16MB 96MB

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Chapter 3BIOS Setup

This chapter explains how to configure the mainboardsBIOS setup program. The setup program providedwith themainboard is the BIOS from AMI.

After you have configured the mainboard and haveassembled the components, turn on the computer andrun the software setup to ensure that the systeminformation is correct.

The software setup of the system board is achievedthrough Basic Input-Output System (BIOS)programming. You use the BIOS setup program to tellthe operating system what type of devices areconnected to your system board.

h

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20 Chapter 3

Entering BIOS Setup

To enter the BIOS Setup program:

1. Turn on or reboot the system. A screen appearswith a series of diagnostic checks.

2. When Hit if you want to run SETUPappears, press the key to enter the BIOSsetup program. The following screen appears:

Standard CMOS setup for changing time, date, hard disk type, etc.

AMIBIOS SIMPLE SETUP UTILITY - VERSION 1.03(C)1997 American megatrends, Inc. All Rights Reserved

Standard CMOS Setup

Advanced CMOS Setup

Advanced Chipset Setup

Power Management Setup

PCI/Plug and Play Setup

Load Optional Settings

Load Best Performance Settings

Peripheral Setup

Change User Password

Auto-Detect Hard Disks

Save Settings and Exit

Exit Without Saving

Esc: Quit : Select Item (Shift) F2: Change Color F5: Old Values

F6: Optional values F7: Best performance values F10 : Save&Exit

3. Use your keyboard to select option. Modify systemparameters to reflect system options.

Default

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BIOS Setup 21

Load Best Performance Settings

This option provides the best performance settings forall devices and system features, but, the manufactureris not guaranty that the system will run smoothlyovernight for these devices.

BIOS Setup

Standard CMOS Setup

Choosing the Standard CMOS Setup from the BIOS

Setup main menu. All Standard Setup options aredescribed in this section.

Date/Time Select the Date or Time option to change thedate or time. The current date and time aredisplayed. Enter new values on properposition.

Pri MasterPri SlaveSec MasterSec Slave

Choose these options to configure the harddisk drive named in the option. When youclick on an option, the following parametersare listed: Type, LBA Mode, Blk Mode, PIOMode, and 32Bit Mode. All parameters relateto IDE drives except Type. Choose the Typeparameter and select Auto BIOS automaticallydetects the IDE drive parameters and displays

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22 Chapter 3

Floppy DriveA, B

Choose the Floppy Drive A or B option tospecify the floppy drive type. The settings are360KB 51/4", 1.2MB 51/4", 720KB 31/2", 1.44MB31/2", or 2.88MB 31/2".

Boot SectorVirusProtection

This option protects the boot sector andpartition table of your hard disk againstaccidental modifications. Any attempt to writeto them will cause the system to halt andcontinue or use a bootable none virus floppydisk to reboot and check your system. Thedefault setting is Disabled. This setting isrecommended because that conflicts with newoperating systems.

Advanced CMOS Setup

Choosing the Advanced CMOS Setup from the BIOS

Setup main menu. All Advanced Setup options aredescribed in this section.

1st Boot Device2nd Boot Device3rd Boot Device4th Boot Device

Set these options to select the bootsequence from different booting devices.

Try Other Boot Set this option to enable other booting

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BIOS Setup 23

Boot Up Num-Lock When this option is set to On, BIOS turnsoff the Num Lock key when the system ispowered on so the end user can use the

arrow keys on both the numeric keypadand the keyboard.

Floppy Drive Swap Set this option to Enabled to specify thatfloppy drives A: and B: are swapped.

Floppy Drive Seek Choose Enabled or Disabled. Disabledprovides a fast boot and reduces thepossibility of damaging the heads.

PS/2 MouseSupport

When this option is set to Enabled, BIOSsupports a PS/2-type mouse.

Primary Display This option configures the primary displaysubsystem in the computer. The settingsareMono (monochrome) Absent, VGA/EGA,CGA 40x50, or CGA 80x25.

Password Check This option specifies the type of BIOSpassword protection that is implemented.The settings are:Setup: The password prompt appears

only when an end user attemptsto run BIOS Setup.

Always: A password prompt appearsevery time the computer is

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24 Chapter 3

External Cache This option selects to enable ExternalCache or not.

System BIOSCacheable

BIOS always copies the system BIOS fromROM to RAM for faster execution. Set thisoption to Enabled to permit the contents ofthe F0000h RAM memory segment to bewritten to and read from cache memory.

C000, 16K Shadow;C400, 16K Shadow;C800, 16K Shadow;CC00, 16K Shadow;D000, 16K Shadow;D400, 16K Shadow;D800, 16K Shadow;DC00, 16K Shadow

Enabled: The contents of the ROM areaare not only copied from ROMto RAM for faster execution, thecontents of the RAM area canbe written to or read from cachememory.

Cached: The contents of the ROM areaare copied from ROM to RAMfor faster execution.

Advanced Chipset Setup

Choose the Advanced Chipset Setup from the BIOSSetup main menu. All Chipset Setup options are thendisplayed and are described in the following section:

DRAM AutoConfiguration

Set this option to enable the AutoConfiguration DRAM Timing and Refresh

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BIOS Setup 25

EDO DRAMAccess Time;FP DRAM Access

Time

Choose either 60ns or 70ns. Depends on thetype of DRAM you use to select the propersetting.

Refresh Cycle Time Choose 0, 4, 8, or 12 cycles. Based on theDRAM specification to select the propersetting. 12 Cycles is recommend if thesystem has a playback application and theinternal VGA runs on a high resolutionmonitor (above 800x600).

OnBoard USB Set this option to Enabled to enable USB(Universal Serial Bus) functions on Chipset.

USB Function forDOS

Set this option to Enabled to enable thesystem BIOS USB (Universal Serial Bus)functions for DOS.

OnChip VGA Set this option to Enabled to enable the VGA

feature on the chipset.

VGA SharedMemory Size

When OnChip VGA is set to Enabled, thesystem must share memory with VGA.

VGA Frequency Set this option to select the frequency ofVGA shared memory. Choose 55MHz forFast Page Mode DRAM and 65MHz forEDO DRAM. SDRAM will be synchronized

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26 Chapter 3

PowerManagement/APM

Set this option to enable power managementfeatures and APM (Advanced PowerManagement).

Green PC MonitorPower State

This option specifies the power state that thegreen PC-compliant video monitor enterswhen BIOS places it in a power savings stateafter the specified period of display inactivityhas expired.

Video PowerDown Mode

This option specifies the power conservingstate that the VESA VGA video subsystem

enters after the specified period of displayinactivity has expired.

Hard Disk PowerDown Mode

This option specifies the power conservingstate that the hard disk drive enters after thespecified period of hard drive inactivity hasexpired.

Standby Time out

(Minute)

This option specified the length of system

inactivity while in Full power on state. Whenthis length of time expires, the computerenters Standby power state.

Suspend Time out(Minute)

This option specified the length of a period ofsystem inactivity while in Standby state.When this length of time expires, thecomputer enters Suspend power state.

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BIOS Setup 27

IRQ3(COM2/COM4);IRQ4(COM1/COM3);IRQ5 (LPT2);IRQ7 (LPT1);IRQ9; IRQ10;IRQ11;IRQ12 (PS2Mouse);IRQ13 (MathCoprocessor);

IRQ14; IRQ15

When set toMonitor, these options enable theevent monitoring on the specified hardwareinterrupt request line. If set toMonitor andthe computer is in a power saving state, BIOSwatches for any activities on the specified IRQline. The computer will enter the full onpower state if any activity occurs.

Soft Off by PowerButton

This option specifies the operation of SoftOff by Power Button.

PCI/PnP Setup

Choose the PCI/Plug and Play Setup from the BIOS

Setup main menu.

Plug and PlayAware OS

Set this option to Yes if the operation systemin this computer is aware of and follows thePlug and Play specification. Currently, onlyWindows 95 is PnP-aware.

PCI Latency Timer(PCI Clocks)

This option specifies the latency timings (inPCI clocks) for all PCI devices on the PCI bus.

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28 Chapter 3

Offboard PCI IDECard

This option specifies if an offboard PCI IDEcontroller adapter card is installed in thecomputer. You must specify the PCIexpansion slot on the motherboard where theoffboard PCI IDE controller is installed. If anoffboard PCI IDE controller is used, theonboard IDE controller is automaticallydisabled. If an offboard PCI IDE controlleradapter card is installed in the computer, youmust also set the Offboard PCI IDE PrimaryIRQ and Offboard PCI IDE Secondary IRQoptions.

Offboard PCI IDEPrimary IRQ;Offboard PCI IDESecondary IRQ

These options specify the PCI interrupt usedby the Primary (or secondary) IDE channel onthe offboard PCI IDE controller.

Assign IRQ to PCIVGA Card

Set this option to Enabled to assign IRQ to PCIVGA Card.

PCI Slot 1/2/3/4IRQ Priority;

These options specify the priority IRQ to beused for any PCI devices installed in PCIexpansion slots 1 through 4.

DMA Channel 0,1, 3, 5, 6, 7

These options specify the bus that thespecified DMA channel is used on.

IRQ3, 4, 5, 7, 9, 10,11, 12, 14, 15

These options specify the bus that thespecified IRQ line is used on. These options

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Chapter 330

ECP Theparall el port can beused withdevices that adhere to the ExtendedCapabil ities Port (ECP)specifi cation. ECP uses theDMAprotocol to achievedata transferrates up to 2.5MB per second. ECP

providessymmetri c bidirectionalcommunication.

Thisoption is only available if the setting oftheParall el Port Modeoption is ECP

Thisoption specifies IRQ to parall el port.

This option specifi es thechannel used by theIDE controller on themotherboard.

These optionsare avail able if thesetting oftheOnboard IDE is not set to Disabled.

Set this option to enable theSound Profunctions.

This item lets you configure thesystempassword and thatis required every timethesystembootsor an attempt ismadeto enter the Setupprogram.The password cannot

belonger than six characters.

Parallel Port Mode

(Continued)

Parallel Port D MA

Channel

Parallel Port IRQ

Onboard PCI IDE

Primary Master

Slave Prefetch;

Secondary Master

Slave Pr efetch

Onboard Sound

Pr o

Note: Keep a record of your new password in a safe place.

If you forget or lose the password, the only way to

access the system is to discharge CMOS RAM

byusing jumper JP2.

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BIOS Setup 31Auto-Detect Hard Disks

If your system has an IDE hard drive, you can use thisitem to detect its parameters and automatically enter

them into the Standard CMOS Setup. This item is setup to auto detect as many as four IDE devices.

Save Settings and Exit

Select this item to save the values modified during thecurrent session and then exit the BIOS setup program.

Exit Without Saving

Select this item to exit the BIOS setup program withoutsaving the values modified during the current session.

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App e n d i x

This function determinesthe amount of DRAM to beused by theVGA accelerator. The video memory required for each resolutionare shown in thetable below:

* If you want run on thehigh resolution VGA modethat depend onyour DRAM speed. TheEDO 60ns DRAM or higher is recommend.

1 IDE - (CD-ROM):\Ide\M571\Win95-- for Windows95(CD-ROM):\Ide\M571 NT -- for WindowsNT

2 VGA - (CD-ROM):\Vga\M571\Win95 -- for Windows95(CD-ROM):\Vga\M571\Winnt -- for Windows NT

3 USB support - (CD-ROM):\Usb

4 Sound Pro - (CD-ROM):\Sound\Soundpro\Dri ver

A. VGA Memory Size/Clock

B. Supported Drivers

.\

.

.

.

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