Gigabyte 6BXC User Manual

R-20-01-090429

6BXC

USER'S MANUAL

1. System power on by PS/2 Mouse: First, enable this function
in CMOS Setup, then you can power on the system by
double clicking the right or left button of your PS/2 Mouse.

2. System power on by Keyboard: If your ATX power supply
supports larger than 300 mA 5V Stand-By current
(dependent on the specification of keyboards), you can
power on your system by entering password from the
keyboard after setting the “Keyboard power on” password in
CMOS Setup.

3. Supports 3 steps ACPI LED.

4. Modem Ring-On. (COM A , B).

5. Wake-Up on LAN. (on JP7) (The ATX power supply supports
larger than 720 mA 5V Stand-By current)

For Intel Pentium II / III / Celeron Processor MAINBOARD

REV. 2.0 First Edition

6BXC

1

The author assumes no responsibility for any errors or omissions which may
appear in this document nor does it make a commitment to update the
information contained herein.

Third-party brands and names are the property of their respective
owners.

Sound Blaster is a registered trademark of Creative Technology Ltd in the
United States and certain other countries. Sound Blaster-LINK and SB-LINK
are trademarks of Creative Technology Ltd.

Apr. 29, 1999 Taipei, Taiwan

Quick Installation Guide

2

I. Quick Installation Guide :

CPU SPEED SETUP

The system bus speed is selectable between 66 / 100 MHz. The user can
select the system bus speed (SW1) and change the DIP SWITCH (SW2)
selection to set up the CPU speed for 233 - 633MHz processor.

Set System Bus Speed
SW1:

CPU AGP 1 2 3 4
100 MHz 66 MHz OFF OFF OFF OFF
133 MHz 89 MHz OFF OFF ON OFF
112 MHz 75 MHz OFF ON OFF OFF

66 MHz 66 MHz ON OFF OFF ON
75 MHz 75 MHz ON ON OFF ON
83 MHz 83 MHz ON OFF ON ON

The CPU speed MUST match with the frequency RATIO. It will cause
system hanging up if the frequency RATIO is higher than that of CPU.

SW2:

CLK RATIO 1 2 3 4

X3

ON OFF ON ON

X3.5

OFF OFF ON ON

X4

ON ON OFF ON

X4.5

OFF ON OFF ON

X5

ON OFF OFF ON

X5.5

OFF OFF OFF ON

X6

ON ON ON OFF

X6.5

OFF ON ON OFF

X 7

ON OFF ON OFF

X 7.5

OFF OFF ON OFF

X 8

ON ON OFF OFF

X 8.5

OFF ON OFF OFF

X 9

ON OFF OFF OFF

X 9.5

OFF OFF OFF OFF

♦Note: It’ s strongly recommended that set the system speed according to

your hardware configuration: CPU, SDRAM, Cards, etc.

6BXC

3

+ The black part in the picture is the white extruding piece of the
DIP switch.

1. Pentium II /Celeron 233 / 66 MHz FSB

CPU

Intel

440BX

PIIX4

6BXC

ON

OFF

SW2

123

4

ON

OFF

SW1

1

2

3

4

2. Pentium II /Celeron 266 / 66 MHz FSB

3. Pentium II /Celeron 300/Celeron 300A / 66 MHz FSB

4. Pentium II /Celeron 333 / 66 MHz FSB

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

Quick Installation Guide

4

5. Pentium II /Celeron 366 / 66MHz FSB

6. Pentium II /Celeron 400 / 66MHz FSB

7. Pentium II /Celeron 433 / 66MHz FSB

8. Pentium II 350 / 100 MHz FSB

9. Pentium II 400 / 100 MHz FSB

10. Pentium III 450 / 100 MHz FSB

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

SW2

ON

4 3 2 1

OFF

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

6BXC

5

11. Pentium III 500 / 100 MHz FSB

12. Pentium III 550 / 100 MHz FSB

13. Pentium III 600 / 100 MHz FSB

14. Pentium III 650 / 100 MHz FSB

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

SW2

ON

4 3 2 1

OFF

SW2

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

SW1

ON

4 3 2 1

OFF

Quick Installation Guide

6

II. Jumper setting :

SPK : Speaker Connector

1

CPU

Intel

440BX

PIIX4

6BXC

+

+

1

Pin Function

1 VCC
2 NC
3 NC
4 Data

RE : Reset Switch

CPU

Intel

440BX

PIIX4

6BXC

Open:
Normal operation

Short:
Reset system

6BXC

7

PW LED : Power LED Connector

CPU

Intel

440BX

PIIX4

6BXC

Pin Function

1 LED anode(+)
2

LED cathode(−)

3

LED cathode(−)

1

1

HD : IDE Hard Disk Active LED

CPU

Intel

440BX

PIIX4

6BXC

1

Pin Function

1 LED anode(+)
2

LED cathode(−)

1

Pin Function

1 LED anode(+)
2

LED cathode(−)

3

LED cathode(−)

4 LED anode(+)

Quick Installation Guide

8

IR : Infrared Connector (Optional)

CPU

Intel

440BX

PIIX4

6BXC

Pin Function

1

IR Data Output

2 GND
3 IR Data Input
4 NC
5 POWER (+)

1

GN : Green Function Switch

CPU

Intel

440BX

PIIX4

6BXC

Open:
Normal
operation

Short:
Entering
Green mode

6BXC

9

GD : Green LED

CPU

Intel

440BX

PIIX4

6BXC

1

Pin Function

1 LED anode(+)
2

LED cathode(−)

1

PW: Soft Power Connector

1

CPU

Intel

440BX

PIIX4

6BXC

Open:
Normal Operation

Short:
Power On/Off

1

Quick Installation Guide

10

POWER1 : Power Connector

CPU

Intel

440BX

PIIX4

6BXC

1

11

Pin Function

3,5,7,13,

15-17

GND

1,2,11 3.3V

4,6,19,20 VCC (+5V)

10 +12V
12

−

12V

18

−

5V
8 Power Good
9 5V SB (Stand by +5V)

14 PS-ON (Soft ON/OFF)

PS/2 Mouse / Keyboard Connector

CPU

Intel

440BX

PIIX4

6BXC

PS/2 Keyboard

PS/2 Mouse

PS/2 Mouse/Keyboard

Pin Function

1 Data
2 NC
3 GND
4 VCC (+5V)
5 Clock
6 NC

6BXC

11

CPU FAN : CPU Cooling Fan Power Connector

CPU

Intel

440BX

PIIX4

6BXC

Pin

Function

1 GND
2 +12V
3 SENSE

1

IDE1: For Primary IDE port

CPU

Intel

440BX

PIIX4

6BXC

1

Quick Installation Guide

12

IDE2: For Secondary IDE port

CPU

Intel

440BX

PIIX4

6BXC

1

FLOPPY : FLOPPY PORT

CPU

Intel

440BX

PIIX4

6BXC

1

6BXC

13

LPT PORT / COM A / COM B

CPU

Intel

440BX

PIIX4

6BXC

COM B

LPT PORT

COM A

JP1 : Keyboard Power On Selection

CPU

Intel

440BX

PIIX4

6BXC

JP1

1

1-2short:
Enable Keyboard Power On.

2-3short: (Default)
Disable Keyboard Power On.

Quick Installation Guide

14

USB : USB Port

CPU

Intel

440BX

PIIX4

6BXC

Pin Function

1 USB V0
2

USB D0−
3 USB D0+
4 GND
5 USB V1
6

USB D1

−

7 USB D1+
8 GND

J15: System After AC Back

CPU

Intel

440BX

PIIX4

6BXC

OPEN: Soft Off (Default)
CLOSE: Full On

Pin Function

1 Signal
2 GND

J15

1

6BXC

15

JP7: Wake On LAN

CPU

Intel

440BX

PIIX4

6BXC

JP7

1

Pin Function

1 +5V SB
2 GND
3 Signal

JP8:SB-LINK Creative PCI Sound Card Support

CPU

Intel

440BX

PIIX4

6BXC

Pin Function

1 Signal
2 GND
3 NC
4 Signal
5 GND
6 Signal

1

2

5

6

JP8

Quick Installation Guide

16

JP10 : System Acceleration

CPU

Intel

440BX

PIIX4

6BXC

BAT1

1-2 Turbo
2-3 100MHz Normal
Default: 2-3 100MHz Normal

1-2 Turbo:
For 100MHz Turbo and
other frequencies

2-3 100MHz Normal:
For 100MHz Normal

1

Power FAN : Power Fan Power Connector

CPU

Intel

440BX

PIIX4

6BXC

Pin

Function

1 GND
2 +12V
3 SENSE

1

6BXC

17

System FAN : System Fan Power Connector

CPU

Intel

440BX

PIIX4

6BXC

Pin

Function

1 GND
2 +12V
3 SENSE

1

JP11:CLEAR CMOS FUNCTION

CPU

Intel

440BX

PIIX4

6BXC

BAT1

1-2 Short :Clear CMOS
2-3 Short :Normal
Default: 2-3 Short

1

Quick Installation Guide

18

Internal Ring Power On Function

CPU

Intel

440BX

PIIX4

6BXC

BAT1

1

Pin

Function

1 Signal
2 GND

JP12 & JP13
(This function is support in PCB version 2.0 and above)

CPU

Intel

440BX

PIIX4

6BXC

BAT1

1
1

JP13
JP12

Open :Normal (Default)

Close :For Voodoo3 VGA card

1

1

JP13
JP12

6BXC

19

BAT1 :Battery

Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by the manufacturer.
Dispose of used batteries according to the manufacturer’s instructions.

CPU

Intel

440BX

PIIX4

6BXC

BAT1

Quick Installation Guide

20

III. Top Performance Test Setting:

The following performance data list is the testing results of some popular
benchmark testing programs.

Users have to modify the value for each item in chipset features as follow
for top performance setting.

6BXC

21

These data are just referred by users, and there is no responsibility for
different testing data values gotten by users. (Different Hardware & Software
configuration will result in different benchmark testing results.)

• CPU

Pentium II processor

• DRAM 128 MB SDRAM (SEC KM48S8030BT-GH)

• CACHE SIZE 512 KB included in CPU

• DISPLAY GA-601 AGP Display Card (4MB SGRAM)

• STORAGE Onboard IDE (IBM DHEA-38451)

• O.S. Windows NT™ 4.0

• DRIVER Display Driver at 1024 x 768 x 256 colors x 75Hz.

TRIONES Bus Master IDE Driver 3.70

Intel Pentium II

Processor

333MHz(66x5) 350MHz(100x3.5)

Winbench98

CPU mark32

864

947

FPU Winmark

1720

1810

Business Disk 1850 1900

Hi-End Disk 4590 4690

Business Graphics 185 204

Hi-End Graphics 207 232

Winstone98

Business 33.3 34.6

Hi-End 36.9 39.2

Table of Contents

1

TABLE OF CONTENTS

1. INTRODUCTION

1.1. PREFACE ......................................................................................................1-1

1.2. KEY FEATHERS............................................................................................1-1

1.3. PERFORMANCE LIST..................................................................................1-2

1.4. BLOCK DIAGRAM.........................................................................................1-3

1.5. INTRODUCE THE PENTIUM II / III PROCESSOR................................... 1-4

1.6. WHAT IS AGP?..............................................................................................1-5

2. SPECIFICATION

2.1. HARDWARE..................................................................................................2-1

2.2. SOFTWARE...................................................................................................2-2

2.3. ENVIRONMENT ............................................................................................2-2

3. HARDWARE INSTALLATION

3.1. UNPACKING.................................................................................................. 3-1

3.2. MAINBOARD LAYOUT .................................................................................3-2

3.3. QUICK REFERENCE FOR JUMPERS & CONNECTORS..........................3-3

3.4. DRAM INSTALLATION .................................................................................3-6

3.5. CPU SPEED SETUP.....................................................................................3-7

3.6. CMOS RTC & ISA CFG CMOS SRAM.........................................................3-8

3.7. SPEAKER CONNECTOR INSTALLATION..................................................3-8

3.8. HARDWARE RESET SWITCH CONNECTOR INSTALLATION.................3-8

3.9. POWER LED CONNECTOR INSTALLATION.............................................3-8

3.10. IDE & ATAPI DEVICE INSTALLATION...................................................... 3-8

6BXC

2

3.11. PERIPHERAL DEVICE INSTALLATION....................................................3-9

3.12. KEYBOARD & PS/2 MOUSE INSTALLATION...........................................3-9

4. BIOS CONFIGURATION

4.1. ENTERING SETUP.......................................................................................4-1

4.2. CONTROL KEYS........................................................................................... 4-1

4.3. GETTING HELP.............................................................................................4-2

4.3.1. Main Menu .....................................................................................4-2

4.3.2. Status Page Setup Menu / Option Page Setup Menu.......................4-2

4.4. THE MAIN MENU..........................................................................................4-2

4.5. STANDARD CMOS SETUP MENU..............................................................4-4

4.6. BIOS FEATURES SETUP............................................................................. 4-8

4.7. CHIPSET FEATURES SETUP......................................................................4-12

4.8. POWER MANAGEMENT SETUP................................................................. 4-15

4.9. PNP/PCI CONFIGURATION........................................................................4-19

4.10. LOAD BIOS DEFAULTS .............................................................................4-21

4.11. LOAD PERFORMANCE DEFAULTS .........................................................4-22

4.12. INTEGRATED PERIPHERALS ................................................................... 4-23

4.13. SUPERVISOR/USER PASSWORD ...........................................................4-28

4.14. IDE HDD AUTO DETECTION.....................................................................4-29

4.15. SAVE & EXIT SETUP..................................................................................4-30

4.16. EXIT WITHOUT SAVING............................................................................ 4-31

Introduction

1-1

1. INTRODUCTION

1.1. PREFACE

Welcome to use the 6BXC motherboard. It is a Pentium II / III / Celeron
Processor based PC / AT compatible system with AGP / PCI / ISA Bus, and
has been designed to be the fastest PC / AT system. There are some new
features allow you to operate the system with just the performance you want.

This manual also explains how to install the motherboard for operation, and
how to set up your CMOS CONFIGURATION with BIOS SETUP program.

1.2. KEY FEATURES

q Intel Pentium



II / III / Celeron Processor based PC / AT compatible main

board.

q Slot 1 supports Pentium



II / III / Celeron processor running at 233-633

MHz.

q Intel 440BX chipset, Supports AGP / SDRAM / Ultra DMA/33 IDE /

Keyboard and PS/2 Mouse Power On / ACPI features.

q Supports 3xDIMMs using 3.3V SDRAM DIMM module.
q Supports16 MB – 768 MB SDRAM memory on board.
q Supports ECC or Non-ECC type DRAM module.
q 1xAGP slot, 4xPCI Bus slots, 3xISA Bus slots.
q Supports 2 channels Ultra DMA/33 IDE ports for 4 IDE Devices.
q Supports 2xCOM (16550), 1xLPT (EPP / ECP), 1x1.44MB Floppy port.
q Supports 2xUSB ports, 1xPS/2 Mouse & 1xPS/2 Keyboard.
q Licensed AWARD BIOS, 2M bits FLASH RAM.
q 30.5 cm x 18 cm ATX SIZE form factor, 4 layers PCB.

6BXC

1-2

1.3. PERFORMANCE LIST

The following performance data list is the testing results of some popular
benchmark testing programs.

These data are just referred by users, and there is no responsibility for
different testing data values gotten by users. (Different Hardware & Software
configuration will result in different benchmark testing results.)

• CPU

Pentium II processor

• DRAM 128 MB SDRAM (SEC KM48S8030BT-GH)

• CACHE SIZE 512 KB included in CPU

• DISPLAY GA-601 AGP Display Card (4MB SGRAM)

• STORAGE

Onboard IDE (IBM DHEA-38451)

• O.S. Windows NT™ 4.0

• DRIVER Display Driver at 1024 x 768 x 256 colors x 75Hz.

TRIONES Bus Master IDE Driver 3.70

Intel Pentium II

Processor

333MHz(66x5) 350MHz(100x3.5)

Winbench98

CPU mark32

864

947

FPU Winmark

1720

1810

Business Disk 1850 1900

Hi-End Disk 4590 4690

Business Graphics 185 204

Hi-End Graphics 207 232

Winstone98

Business 33.3 34.6

Hi-End 36.9 39.2

Introduction

1-3

3.3V SDRAM

DIMM Sockets

Floppy Port

1.4. BLOCK DIAGRAM

24MHz

14.318MHz

33 MHz

33MHz

Ultra DMA/33

IDE Ports

IDE Bus

PCI Bus

ISA Bus

AGP Bus

LPT Port

Keyboard

COM Ports

PS/2 Mouse

USB Bus

14.318MHz

48MHz

14.318MHz

I/O

CHIPSET

ITE 8671

AGP

Host Bus

INTEL

82443BX

CHIPSET

PIIX4

82371EB

CHIPSET

ICS 9148-26

SLOT 1

66MHz

66 /

100 MHz

66 /

100 MHz

33 MHz

66 /

100 MHz

6BXC

1-4

1.5. INTRODUCE THE Pentium II / III Processor

Figure 1: Universal Retention Mechanism & attach Mount

Figure 2:OEM Pentium II Processor

Introduction

1-5

Figure 3: OEM Pentium III Processor

1.6 What is AGP

?

The Accelerated Graphics Port (AGP) is a new port on the Host-To-PCI bridge
device that supports an AGP port. The main purpose of the AGP port is to
provide fast access to system memory.

The AGP port can be used either as fast PCI port (32-bits at 66MHz vs.32-Bits
at 33MHz) or as an AGP port which supports 2x data-rate, a read queue, and
side band addressing. When the 2x-data rate is used the port can transmit
data at 533MB/sec (66.6*2*4). The read-queue can be used to pipeline reads
– removing the effects of the reads-latency. Side band addressing can be
used to transmit the data address on a separate line in order to speed up the
transaction.

6BXC

2-1

2. SPECIFICATION

2.1. HARDWARE

• CPU

− Pentium



II/ III/ Celeron processor 233 – 633

MHz.

− 242 pins 66 / 100MHz slot1 on board.

• SPEED

− 66/100 MHz system speed.

− 66 MHz AGP bus speed. (2X mode 133MHz)

− 33 MHz PCI-Bus speed.

− 8 MHz AT bus speed.

• DRAM MEMORY

− 3 banks 168 pins DIMM module sockets on board.

− Use 16 / 32 / 64 / 128 / 256 MB DIMM module

DRAM.

− 16 ~ 768MB SDRAM.

− Supports 3.3V SDRAM.

− Supports ECC or Non-ECC type DRAM.

• CACHE MEMORY

− 32 KB L1 cache memory included in CPU.

− 128KB / 512 KB L2 cache memory included in CPU.

− Supports DIB speed mode for L2 Cache.

• I/O BUS SLOTS

− 4 33MHz Master / Slave PCI-BUS.

− 3 8MHz 16 bits ISA BUS.

− 1 66MHz / 133MHz AGP bus.

• IDE PORTS

− 2 Ultra DMA/33 Bus Master IDE channels onboard.

(Using IRQ14,15)

− Support Mode 3,4 IDE & ATAPI CD – ROM.

• I/O PORTS

− Supports 2 16550 COM ports.

− Supports 1 EPP/ECP LPT port.

− Supports 1 1.44 / 2.88 MB Floppy port.

− Supports 2 USB ports.

− Supports PS/2 Mouse & PS/2 Keyboard.

Specification

2-2

• GREEN FUNCTION

− Suspend mode support.

− Green switch & ACPI LED support.

− IDE & Display power down support.

− Monitor all IRQ / DMA / Display / I/O events.

• BIOS

− 2M bits FLASH RAM.

− Supports Plug & Play, DMI Function.

• DIMENSION

− ATX Form Factor, 4 layers PCB.

2.2. SOFTWARE

• DRIVER − INTEL Bus Master IDE Driver.

− Suspend to HD utility.

− INTEL Patch 95

• BIOS

− Licensed AWARD BIOS.

− AT CMOS Setup, BIOS / Chipset Setup, Green

Setup, Hard Disk Utility included.

• O.S.

− Operation with MS-DOS



, Windows95,

Windows98,WINDOWS NT™, OS/2, NOVELL and
SCO UNIX.

2.3. ENVIRONMENT

• Ambient Temp.

− 0°C to +50°C (Operating).

• Relative Hum. − 0 to +85% (Operating).

• Altitude − 0 to 10,000 feet (Operating).

• Vibration − 0 to 1,000 Hz.

• Electricity − 4.9 V to 5.2 V. (Max. 20A current at 5V.)

6BXC

3-1

3. HARDWARE INSTALLATION

3.1. UNPACKING

The main board package should contain the following:

• The 6BXC main board.

• Universal Retention Mechanism & Attach Mount

• USER’ S MANUAL for main board.

• Cable set for IDE, Floppy devices.

• Diskette or CD for main board Utility.

The main board contains sensitive electric components, which can be easily
damaged by static electricity, so the main board should be left in its original
packing until it is installed.

Unpacking and installation should be done on a grounded anti-static mat. The
operator should be wearing an anti static wristband, grounded at the same
point as the anti-static mat.

Inspect the main board carton for obvious damage. Shipping and handling
may cause damage to your board. Be sure there are no shipping and handling
damages on the board before proceeding.

After opening the main board carton, extract the system board and place it
only on a grounded anti-static surface component side up. Again inspect the
board for damage. Press down on all of the socket IC's to make sure that they
are properly seated. Do this only on with the board placed on a firm flat
surface.

M

DO NOT APPLY POWER TO THE BOARD IF IT HAS BEEN DAMAGED.

Hardware Installation

3-2

3.2. MAINBOARD LAYOUT
PCB Ver : 1.9

CPU

Intel

440BX

PIIX4

J15

SW 2

BIOS

6BXC

SLOT1

SLOT2

SLOT3

SLOT4

SLOT5

SLOT6

PCI 1PCI 2PCI 3PCI 4

AGP

DIMM 1

DIMM 3

DIMM 2

BANK 0
BANK 1
BANK 2

IDE 2
IDE 1

FLOPPY

COM A COM B

LPT

USB

PS/2

ATX Power

JP1

SW 1

JP7

JP8

BAT1

JP9

SPK RST1PWR

11 1 1 1 1 1

HD IR GN

SOFT
PWR

GD

JP10

PWR FAN

SYS FAN

RING PWR ON

Clear CMOS

PCB Ver : 2.0

CPU

Intel

440BX

PIIX4

J15

SW 2

BIOS

6BXC

SLOT1

SLOT2

SLOT3

SLOT4

SLOT5

SLOT6

PCI 1PCI 2PCI 3PCI 4

AGP

DIMM 1

DIMM 3

DIMM 2

BANK 0
BANK 1
BANK 2

IDE 2
IDE 1

FLOPPY

COM A COM B

LPT

USB

PS/2

ATX Power

JP1

SW 1

JP7

JP8

BAT1

JP9

SPK RST1PWR

11 1 1 1 1 1

HD IR GN

SOFT
PWR

GD

JP10

PWR FAN

SYS FAN

RING PWR ON

Clear CMOS

JP13
JP12

×

Figure 3.1

Ø

6BXC

3-3

3.3. QUICK REFERENCE FOR JUMPERS & CONNECTORS

t I/O Ports Connector

USB USB port.
IDE 1 For Primary IDE port.
IDE 2 For Secondary IDE port.

PS/2 For PS/2 Keyboard port.

PS/2 For PS/2 Mouse port.

Floppy For Floppy port
COM B For Serial port2 (COM B).[Support Modem ring on.]
COM A For Serial port1 (COM A).[Support Modem ring on.]

LPT For LPT port.

ATX Power For ATX Power connector.

t Slot 1

For Pentium II / III / Celeron processor installed

t CPU FAN : CPU cooling FAN Power Connector

Pin No. Function

1 GND.
2 +12V
3 SENSE

t Power FAN : Power FAN Power Connector

Pin No. Function

1 GND.
2 +12V
3 SENSE

t System FAN : System FAN Power Connector

Pin No. Function

1 GND.
2 +12V
3 SENSE

Hardware Installation

3-4

t J15 : System After Ac Back

Open Soft Off

Short Full On

t JP1 : Keyboard Power On Selection

Pin No. Function

1-2 Enabled Keyboard power on.
2-3 Disabled Keyboard power on.(Default)

t JP10 : System Acceleration

1-2 short For 100MHz Turbo and other frequencies
2-3 short For 100MHz Normal (Default)

t JP7 : Wake on LAN Connector

Pin No. Function

1 +5VSB
2 GND
3 CTRL-Signal

t JP11 : CLEAR CMOS Function

Pin No. Function
1-2 short CLEAR CMOS Function
2-3 short Normal Operation.(Default)

t Internal Ring Power on

Pin No. Function

1 +5VSB
2 GND

t JP8 : For PCI Sound Card Connector

Pin No. Function

1 Signal
2 GND
3 NC
4 Signal
5 GND
6 Signal

6BXC

3-5

t IR: INFRARED Connector (OPTIONAL)

Pin No. Function

1 IR DATA OUTPUT
2 GND
3 IR DATA INPUT
4 NC
5 POWER¡]¡Ï¡^

t JP12&JP13(This function is support in PCB version 2.0 and above)

Pin No. Function

Open Normal
Close For Voodoo3 VGA card

JP9 : 2*11PIN Jumper

PW: Soft Power Connector

Open: Normal Operation
Short: Power On/Off

RE: Reset Switch

Open: Normal Operation
Short: For Hardware Reset System

P+P−P−: Power LED

PIN 1 : anode (+)
PIN 2 : cathode (−)
PIN 3 : cathode (−)

1

JP9

PW

P+P−P−HD

RE SPK

GN

GD

1

1

1

1

Hardware Installation

3-6

SPK: Speaker Connector

PIN 1 : VCC (+)
PIN 2 : NC
PIN 3 : NC

PIN 4 : Data (−)

HD: IDE Hard Disk Active LED

PIN 1: LED anode (+)
PIN 2: LED cathode (−)

GN: Green Function Switch

Open : Normal operation
Short : Entering Green Mode

GD: Green LED

PIN 1 : LED anode (+)
PIN 2 : LED cathode (−)

3.4. DRAM INSTALLATION

The main board can be installed with 16 / 32 / 64 / 128 / 256 MB 168 pins
DIMM module DRAM, and the DRAM speed must be 67~100 MHz for SDRAM
when system bus speed is set to 66MHz. When system bus speed is set to
100MHz, 100MHz SDRAM is required. The DRAM memory system on main
board consists of bank 0, 1& bank 2.

Since 168 pins DIMM module is 64 bits width, therefore 1 piece of DIMM
module may match a 64 bits system. The total memory size is 16 MB ~ 768MB
SDRAM. The DRAM installation position refer to Figure 3.1, and notice the Pin
1 of DIMM module must match with the Pin 1 of DIMM socket. Insert the
DRAM DIMM module into the DIMM socket at Vertical angle. If there is a
wrong direction of Pin 1, the DRAM DIMM module could not be inserted into
socket completely.

1

1

1

+

−

6BXC

3-7

3.5. CPU SPEED SETUP

The system bus speed can be set to 66 / 100MHz form the DIP SWITCH
(SW1). The user can change the DIP SWITCH (SW2) selection to set up the
CPU speed for different processors. The CPU speed must match with the
frequency RATIO and Front Side Bus (FSB) speed. It will cause system
hanging up if the frequency RATIO and FSB Speed do not match with the
CPU.

DIP SWITCH (SW2)

1 2 3 4

FREQ.

RATIO

(SW2)

EXT.CLK.

MHz

(SW1)

AGP

INT.CLK.

MHz

CPU Type

OFF OFF ON ON 3.5 66 66 233

Pentium II 233 MHz
(Celeron 233MHz)

ON ON OFF ON 4 66 66 266

Pentium II 266 MHz
(Celeron 266MHz)

OFF ON OFF ON 4.5 66 66 300

Pentium II 300 MHz
(Celeron 300MHz)

ON OFF OFF ON 5 66 66 333

Pentium II 333 MHz
(Celeron 333MHz)

OFF OFF OFF ON 5.5 66 66 366

Pentium II 366 MHz
(Celeron 366MHz)

ON ON ON OFF 6 66 66 400

Pentium II 400 MHz
(Celeron 400MHz)

OFF ON ON OFF 6.5 66 66 433

Pentium II 433 MHz
(Celeron 433MHz)

OFF OFF ON ON 3.5 100 66 350 Pentium



II 350 MHz

ON ON OFF ON 4 100 66 400 Pentium



II 400 MHz

OFF ON OFF ON 4.5 100 66 450 Pentium



III 450 MHz

ON OFF OFF ON 5 100 66 500 Pentium



III 500 MHz

OFF OFF OFF ON 5.5 100 66 550 Pentium



III 550 MHz

ON ON ON OFF 6

100 66 600 Pentium



III 600 MHz

OFF ON ON OFF 6.5

100 66 650 Pentium



III 650 MHz

M

The CPU is a sensitive electric component and it can be easily
damaged by static electricity, so users must keep it away from metal
surface when the CPU is installed onto main board.

Hardware Installation

3-8

3.6. CMOS RTC & ISA CFG CMOS SRAM

There're RTC & CMOS SRAM on board; they have a power supply from
external battery to keep the DATA inviolate & effective. The RTC is a REAL­TIME CLOCK device, which provides the DATE & TIME to system. The CMOS
SRAM is used for keeping the information of system configuration, so the
system can automatically boot OS every time. Since the lifetime of internal
battery is 5 years, the user can change a new Battery to replace old one after
it cannot work.

M Danger of explosion if battery is incorrectly replaced.
M Replace only with the same or equivalent type recommended by the

manufacturer.

M Dispose of used batteries according to the manufacturer’ s instructions.

3.7. SPEAKER CONNECTOR INSTALLATION

There is a speaker in AT system for sound purpose. The 4 - Pins connector

SPK is used to connect speaker.

3.8. HARDWARE RESET SWITCH CONNECTOR INSTALLATION

The RESET switch on panel provides users with HARDWARE RESET
function. The system will do a cold start after the RESET switch is pushed and
released by user. The RESET switch is a 2 PIN connector and should be
installed to RST on main board.

3.9. POWER LED CONNECTOR INSTALLATION

System has Power LED lamp on the panel of case. The Power LED will light
on off or flash to indicate which step on the system. The connector should be
connected to PWR of main board in correct direction.

3.10. IDE & ATAPI DEVICE INSTALLATION

There are two-Enhanced PCI IDE ports (IDE1, IDE2) on board, which following
ATAPI standard SPEC. Any one IDE port can connected to two ATAPI devices
(IDE Hard Disk, CD-ROM & Tape Driver), so total four ATAPI devices can exist
in a system. The HD is the active LED port for ATAPI devices.

6BXC

3-9

3.11. PERIPHERAL DEVICE INSTALLATION

After the I/O device installation and jumpers setup, the main board can be
mounted into the case and fixed by screw. To complete the main board
installation, the peripheral device could be installed now. The basic system
needs a display interface card. If the PCI - Bus device is to be installed in the
system, any one of four PCI - Bus slots can be used.

3.12. KEYBOARD & PS/2 MOUSE INSTALLATION

The main board supports PS/2 Mouse (J2). The BIOS will auto detect whether
the PS/2 Mouse is installed or not & assign IRQ12 for PS/2 Mouse port if it is
installed. After installing the peripheral device, the user should check
everything again, and prepare to power-on the system.