Gigabyte GA-6BXC User Manual

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

R-20-01-090429

6BXC

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

1

Quick Installation Guide

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

X3.5

X4

X4.5

X5

X5.5

X6
X6.5

X 7

X 7.5

X 8

X 8.5

X 9

X 9.5

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

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

ON OFF ON ON

OFF OFF ON ON

ON ON OFF ON

OFF ON OFF ON

ON OFF OFF ON

OFF OFF OFF ON

ON ON ON OFF

OFF ON ON OFF

ON OFF ON OFF

OFF OFF ON OFF

ON ON OFF OFF

OFF ON OFF OFF

ON OFF OFF OFF

OFF OFF OFF OFF

2

6BXC

6BXC

SW2

3

OFF

OFF

4 3 2 1

4 3 2 1

4 3 2 1

4 3 2 1

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

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

CPU

PIIX4

SW1

2

4

1

OFF
ON

4

Intel

440BX

123

OFF
ON

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

4 3 2 1

SW1

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

SW1

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

ON

OFF

ON

SW2

SW2

4 3 2 1

ON

OFF

ON

SW1

OFF

ON

SW2

OFF

ON

3

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

4 3 2 1

4 3 2 1

4 3 2 1

4 3 2 1

Quick Installation Guide

4 3 2 1

SW1

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

OFF

ON

SW2

4 3 2 1

SW1

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

OFF

ON

SW2

4 3 2 1

SW1

8. Pentium II 350 / 100 MHz FSB

SW1

9. Pentium II 400 / 100 MHz FSB

SW1

OFF

ON

OFF
ON

OFF
ON

SW2

SW2

SW2

4 3 2 1

4 3 2 1

4 3 2 1

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

10. Pentium III 450 / 100 MHz FSB

4 3 2 1

OFF

SW1

ON

SW2

4 3 2 1

OFF

ON

4

6BXC

4 3 2 1

4 3 2 1

11. Pentium III 500 / 100 MHz FSB

4 3 2 1

OFF

SW1

12. Pentium III 550 / 100 MHz FSB

ON

SW2

4 3 2 1

OFF

SW1

13. Pentium III 600 / 100 MHz FSB

ON

SW2

4 3 2 1

SW1

14. Pentium III 650 / 100 MHz FSB

OFF

ON

SW2

4 3 2 1

SW1

OFF

ON

SW2

4 3 2 1

OFF

ON

4 3 2 1

OFF

ON

OFF

ON

OFF

ON

5

II. Jumper setting :

6BXC

6BXC

SPK : Speaker Connector

PIIX4

1

+

RE : Reset Switch

Quick Installation Guide

1

CPU

+

Pin Function

Intel

440BX

1 VCC
2 NC
3 NC
4 Data

PIIX4

CPU

Open:
Normal operation

Intel

440BX

Short:
Reset system

6

6BXC

6BXC

6BXC

PW LED : Power LED Connector

CPU

1

PIIX4

1

HD : IDE Hard Disk Active LED

PIIX4

Pin Function

Intel

440BX

1 LED anode(+)
2
3

LED cathode(−)
LED cathode(−)

1

CPU

Pin Function

Intel

1 LED anode(+)

440BX

2

LED cathode(−)

1

Pin Function

1 LED anode(+)
2

LED cathode(−)

3

LED cathode(−)

4 LED anode(+)

7

IR : Infrared Connector (Optional)

6BXC

IR Data Output

6BXC

PIIX4

GN : Green Function Switch

Quick Installation Guide

CPU

1

Intel

Pin Function

440BX

1
2 GND
3 IR Data Input
4 NC
5 POWER (+)

PIIX4

CPU

Open:
Normal

Intel

operation

440BX

Short:
Entering
Green mode

8

6BXC

6BXC

6BXC

GD : Green LED

PIIX4

PW: Soft Power Connector

CPU

1

Intel

440BX

Pin Function

1 LED anode(+)
2

LED cathode(−)

1

CPU

1

PIIX4

Open:

Intel

440BX

Normal Operation
Short:

Power On/Off

1

9

POWER1 : Power Connector

6BXC

6BXC

1

Quick Installation Guide

11

Pin Function

3,5,7,13,

15-17

GND

1,2,11 3.3V

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

10 +12V
12
18

PIIX4

−

−

12V

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

14 PS-ON (Soft ON/OFF)

PS/2 Mouse / Keyboard Connector

PS/2 Mouse

PS/2 Mouse/Keyboard

Pin Function

1 Data
2 NC
3 GND

PIIX4

4 VCC (+5V)
5 Clock
6 NC

CPU

Intel

440BX

CPU

Intel

440BX

PS/2 Keyboard

10

6BXC

6BXC

Function

6BXC

CPU FAN : CPU Cooling Fan Power Connector

1

Pin

1 GND
2 +12V
3 SENSE

PIIX4

IDE1: For Primary IDE port

PIIX4

CPU

Intel

440BX

CPU

Intel

440BX

1

11

IDE2: For Secondary IDE port

6BXC

6BXC

PIIX4

FLOPPY : FLOPPY PORT

CPU

Intel

440BX

CPU

Intel

440BX

Quick Installation Guide

1

PIIX4

1

12

6BXC

6BXC

6BXC

LPT PORT / COM A / COM B

PIIX4

CPU

LPT PORT

Intel

440BX

JP1 : Keyboard Power On Selection

PIIX4

COM B

CPU

JP1

Intel

440BX

1-2short:

COM A

1

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

Disable Keyboard Power On.

13

USB : USB Port

6BXC

6BXC

Quick Installation Guide

Pin Function

1 USB V0
2
3 USB D0+
4 GND
5 USB V1
6

PIIX4

7 USB D1+
8 GND

J15: System After AC Back

PIIX4

USB D0−

USB D1

CPU

Intel

440BX

−

CPU

Intel

440BX

1

J15

OPEN: Soft Off (Default)
CLOSE: Full On

Pin Function

1 Signal
2 GND

14

6BXC

6BXC

6BXC

JP8

JP7: Wake On LAN

CPU

JP7

Intel

440BX

PIIX4

JP8:SB-LINK Creative PCI Sound Card Support

1

Pin Function

1 +5V SB
2 GND
3 Signal

PIIX4

15

CPU

Intel

440BX

1

5

2

6

Pin Function

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

JP10 : System Acceleration

6BXC

6BXC

Function

Quick Installation Guide

1

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

1-2 Turbo:
For 100MHz Turbo and

PIIX4

BAT1

other frequencies
2-3 100MHz Normal:

For 100MHz Normal

Power FAN : Power Fan Power Connector

1

Pin

1 GND
2 +12V
3 SENSE

CPU

Intel

440BX

CPU

Intel

440BX

PIIX4

16

6BXC

6BXC

Function

6BXC

System FAN : System Fan Power Connector

PIIX4

1

JP11:CLEAR CMOS FUNCTION

CPU

Intel

440BX

Pin

1 GND
2 +12V
3 SENSE

1

CPU

PIIX4

BAT1

Intel

1-2 Short :Clear CMOS

440BX

2-3 Short :Normal
Default: 2-3 Short

17

Quick Installation Guide

6BXC

Function

6BXC

1

Internal Ring Power On Function

CPU

1

Intel

440BX

Pin

1 Signal

PIIX4

BAT1

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

2 GND

1

1

JP13
JP12

Open :Normal (Default)

1

JP13
JP12

PIIX4

Close :For Voodoo3 VGA card

BAT1

18

CPU

Intel

440BX

6BXC

6BXC

BAT1 :Battery

CPU

Intel

440BX

PIIX4

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.

BAT1

19

Quick Installation Guide

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.

20

6BXC

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

• 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.

Pentium II processor

TRIONES Bus Master IDE Driver 3.70

Processor

Intel Pentium II

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

Winbench98

CPU mark32

FPU Winmark

Business Disk 1850 1900

Hi-End Disk 4590 4690

Business Graphics 185 204

Hi-End Graphics 207 232

864
1720

Winstone98

Business 33.3 34.6

Hi-End 36.9 39.2

21

947
1810

Table of Contents

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

1

6BXC

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

2

Introduction

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

board.



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

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.

1-1

6BXC

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

• DRAM 128 MB SDRAM (SEC KM48S8030BT-GH)

• CACHE SIZE 512 KB included in CPU

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

• STORAGE

• O.S. Windows NT™ 4.0

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

Processor

Pentium II processor

Onboard IDE (IBM DHEA-38451)

TRIONES Bus Master IDE Driver 3.70

Intel Pentium II

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

Winbench98

CPU mark32

FPU Winmark

Business Disk 1850 1900

Hi-End Disk 4590 4690

Business Graphics 185 204

Hi-End Graphics 207 232

864
1720

947
1810

Winstone98

Business 33.3 34.6

Hi-End 36.9 39.2

1-2

Introduction

INTEL

33 MHz

1.4. BLOCK DIAGRAM

AGP Bus

AGP

Ultra DMA/33

IDE Ports

66MHz

PCI Bus

IDE Bus

ISA Bus

SLOT 1

Host Bus

82443BX

CHIPSET

PIIX4

82371EB

CHIPSET

33MHz

66 /

100 MHz

33 MHz

48MHz

14.318MHz

USB Bus

14.318MHz

14.318MHz

66 /

100 MHz

I/O

CHIPSET

ITE 8671

3.3V SDRAM

DIMM Sockets

66 /

100 MHz

ICS 9148-26

LPT Port

Floppy Port

24MHz

COM Ports

1-3

Keyboard

PS/2 Mouse

6BXC

1.5. INTRODUCE THE Pentium II / III Processor

Figure 1: Universal Retention Mechanism & attach Mount

Figure 2:OEM Pentium II Processor

1-4

Figure 3: OEM Pentium III Processor

Introduction

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.

1-5

6BXC

2. SPECIFICATION

2.1. HARDWARE

• CPU

• SPEED

• DRAM MEMORY

• CACHE MEMORY

• I/O BUS SLOTS

• IDE PORTS

• I/O PORTS

− Pentium



II/ III/ Celeron processor 233 – 633

MHz.

− 242 pins 66 / 100MHz slot1 on board.

− 66/100 MHz system speed.

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

− 33 MHz PCI-Bus speed.

− 8 MHz AT bus speed.

− 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.

− 32 KB L1 cache memory included in CPU.

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

− Supports DIB speed mode for L2 Cache.

− 4 33MHz Master / Slave PCI-BUS.

− 3 8MHz 16 bits ISA BUS.

− 1 66MHz / 133MHz AGP bus.

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

(Using IRQ14,15)

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

− 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.

2-1

Specification

• GREEN FUNCTION

• BIOS

• DIMENSION

− Suspend mode support.

− Green switch & ACPI LED support.

− IDE & Display power down support.

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

− 2M bits FLASH RAM.

− Supports Plug & Play, DMI Function.

− 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.)

2-2

6BXC

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.

3-1

3.2. MAINBOARD LAYOUT

6BXC

SYS FAN

RING PWR ON

Clear CMOS

6BXC

SYS FAN

RING PWR ON

Clear CMOS

PCB Ver : 1.9

SLOT1

SLOT3

SLOT5

BIOS

JP7

JP8

Hardware Installation

COM A COM B

LPT

PCI 1PCI 2PCI 3PCI 4

AGP

JP10

CPU

Intel

440BX

PS/2

USB

JP1

SW 1

SLOT4

SLOT6

SPK RST1PWR

PCB Ver : 2.0

SLOT3

SLOT5

SLOT4

SLOT6

SPK RST1PWR

PIIX4

SLOT2

JP9

11 1 1 1 1 1

HD IR GN

SLOT1

PIIX4

SLOT2

JP9

11 1 1 1 1 1

HD IR GN

BAT1

J15

SOFT
PWR

BIOS

JP7

JP8

BAT1

J15

SOFT
PWR

SW 2

GD

PCI 1PCI 2PCI 3PCI 4

SW 2

GD

×

Figure 3.1

AGP

Ø

BANK 0
BANK 1
BANK 2

IDE 2

IDE 1

COM A COM B

JP10

BANK 0
BANK 1
BANK 2

IDE 2

IDE 1

LPT

CPU

Intel

440BX

PWR FAN

ATX Power

FLOPPY

PWR FAN

ATX Power

FLOPPY

JP1

USB

JP13
JP12

SW 1

DIMM 1
DIMM 2
DIMM 3

PS/2

DIMM 1
DIMM 2
DIMM 3

3-2

6BXC

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

3-3

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)

Hardware Installation

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

3-4

6BXC

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

GD

PW

P+P−P−HD

GN

JP9

1

1

RE SPK

PW: Soft Power Connector

RE: Reset Switch

P+P−P−: Power LED

1

1

Open: Normal Operation
Short: Power On/Off

Open: Normal Operation
Short: For Hardware Reset System

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

1

3-5

SPK: Speaker Connector

−

Hardware Installation

+

1

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

PIN 4 : Data (−)

HD: IDE Hard Disk Active LED

1

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 (+)

1

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.

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6BXC

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

OFF OFF ON ON 3.5 66 66 233

ON ON OFF ON 4 66 66 266

OFF ON OFF ON 4.5 66 66 300

ON OFF OFF ON 5 66 66 333

OFF OFF OFF ON 5.5 66 66 366

ON ON ON OFF 6 66 66 400

OFF ON ON OFF 6.5 66 66 433

OFF OFF ON ON 3.5 100 66 350 Pentium

ON ON OFF ON 4 100 66 400 Pentium

OFF ON OFF ON 4.5 100 66 450 Pentium

ON OFF OFF ON 5 100 66 500 Pentium

OFF OFF OFF ON 5.5 100 66 550 Pentium

ON ON ON OFF 6

OFF ON ON OFF 6.5

FREQ.

RATIO

(SW2)

EXT.CLK.

MHz

(SW1)

100 66 600 Pentium
100 66 650 Pentium

AGP

INT.CLK.

MHz

CPU Type

Pentium II 233 MHz
(Celeron 233MHz)
Pentium II 266 MHz
(Celeron 266MHz)
Pentium II 300 MHz
(Celeron 300MHz)
Pentium II 333 MHz
(Celeron 333MHz)

Pentium II 366 MHz
(Celeron 366MHz)

Pentium II 400 MHz
(Celeron 400MHz)
Pentium II 433 MHz
(Celeron 433MHz)



II 350 MHz



II 400 MHz



III 450 MHz



III 500 MHz



III 550 MHz



III 600 MHz



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.

3-7

Hardware Installation

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.

3-8

6BXC

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.

3-9