Gigabyte 6BXA User manual

6BXA
1
TABLE OF CONTENTS
1. INTRODUCTION
1.1. PREFACE..........................................................................................................1-1
1.2. KEY FEATURES...............................................................................................1-1
1.3. PERFORMANCE LIST .....................................................................................1-2
1.4. BLOCK DIAGRAM............................................................................................1-3
1.5. INTRODUCE THE PentiumII Processor & AGP..........................................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.............................3-2
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....................3-9
3.9. POWER LED CONNECTOR INSTALLATION ................................................3-9
3.10. IDE & ATAPI DEVICE INSTALLATION .........................................................3-9

Table of Contents
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.........................................................................4-13
4.8. POWER MANAGEMENT SETUP....................................................................4-17
4.9. PNP/PCI CONFIGURATION............................................................................4-21
4.10. LOAD BIOS DEFAULTS.................................................................................4-23
4.11. LOAD PERFORMANCE DEFAULTS.............................................................4-24
4.12. INTEGRATED PERIPHERALS......................................................................4-25
4.13. SUPERVISOR/USER PASSWORD...............................................................4-30
4.14. IDE HDD AUTO DETECTION........................................................................4-31
4.15. SAVE & EXIT SETUP.....................................................................................4-32
4.16. EXIT WITHOUT SAVING ...............................................................................4-33

6BXA
1-1
1. INTRODUCTION
1.1. PREFACE
Welcome to use the 6BXA motherboard. It is a PentiumII / 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
qIntel PentiumII / Celeron Processor based PC / AT compatible
mainboard.
qSlot 1 supports PentiumII / Celeron processor running at 233-633 MHz.
qIntel 440BX chipset, Supports SDRAM / Ultra DMA 33 IDE.
qBuilt-in PCI ESS SOLO 1 audio chip.
qSupports external Modem Ring-On on COM A&B and Internal.
qSupports Wake-up on LAN (JP10).
qSupports 3xDIMMs using 3.3V EDO or SDRAM DIMM module.
qSupports 16 MB - 768 MB SDRAM .
q5xPCI Bus slots, 1xISA Bus slots, 1xAGP slot.
qSupports 2 channels Ultra DMA 33 IDE ports for 4 IDE Devices.
qSupports 2xCOM (16550), 1xLPT (EPP / ECP), 1x Floppy port.
qSupports 2xUSB ports, 1xPS/2 Mouse, 1xPS/2 Keyboard.
qLicensed AWARD BIOS, 2Mbits FLASH RAM.
q30.5 cm x 19 cm ATX form factor, 4 layers PCB.

Introduction
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. (The different Hardware &
Software configuration will result in different benchmark testing results.)
•CPU PentiumII processor
•DRAM (128 x 1) MB SDRAM (TOSHIBA TC59S6408FTL-80H)
•CACHE SIZE 512 KB included in CPU
•DISPLAY GA-630 voodoo banshee (16MB SGRAM)
•STORAGE Onboard IDE (IBM DHEA 36481)
•O.S. Windows NT™4.0 SPK4
•DRIVER Display Driver at 1024 x 768 x 64K colors x 75Hz.
TRIONES Bus Master IDE Driver 3.70a
Intel PentiumII
Processor 500MHz(100x5) 400MHz(100x4)
Winbench99
CPU mark32 1270 1080
FPU Winmark 2560 2070
Business Disk 4200 4070
Hi-End Disk 8210 8300
Business Graphics 228 198
Hi-End Graphics 408 345
Winstone99 Business 34.2 31.3
Hi-End 30.2 26.7

6BXA
1-3
3.3V EDO/SDRAM
DIMM Sockets
Floppy Port
1.4. BLOCK DIAGRAM
Ultra DMA/33
IDE Ports
Game
Port PS/2 Keyboard
24MHz
33MHz
33MHz
33MHz
66MHz
66MHz
IDE Bus
PCI Bus
AGP
Bus
LPT Port
COM Ports
DRAM Bus
PS/2 Mouse
USB Bus
USB Ports
14.318MHz
48MHz
14.318MHz
I/O
CHIPSET
IT8671F
Host Bus
PIIX 4
CHIPSET
82443BX
CHIPSET
Clock
Generator
MIC
L-IN
L-OUT
ESS
SOLO-1
14.318MHz
66MHz
AGP
Slot
SLOT 1

Introduction
1-4
1.5. INTRODUCE THE Pentium

II Processor & AGP
Figure 1:Retention Mechanism & attach Mount
Figure 2:OEM PentiumII Processor

6BXA
1-5
Figure 3:Heatsink / FAN & Heat sink support for OEM PentiumII Processor
Figure 4:Boxed PentiumII Processor & Heat sink support
1.6 What is AGP ?

Introduction
1-6
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.

6BXA
2-1
2. SPECIFICATION
2.1. HARDWARE
•CPU −PentiumII / Celeron processor 233 –633 MHz.
−242 pins 66 MHz 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.
•PROTECTION −Speaker Alarm when detect "CPU FAN Failure" or
“CPU Overheat”.
−Automatically slow down CPU speed when "CPU
Overheat".
−H/W monitor power status (±5V, ±12V, VCOREA,
VGTL, VCC3, VBAT, 5VSB voltage & CMOS battery
voltage).(Optional)
•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 / EDO type DRAM.
•CACHE MEMORY −32 KB 1st cache memory included in CPU.
−256KB/512 KB 2nd cache in CPU.
−Supports DIB speed mode for L2 Cache.
•I/O BUS SLOTS −5 33MHz Master / Slave PCI-BUS.
−1 33MHz AGP BUS.
−1 8MHz 16 bits ISA BUS.
•IDE PORTS −2 Ultra DMA 33 Bus Master IDE channels on
board.(Using IRQ14,15)
−Support Mode 3,4 IDE & ATAPI CD –ROM.
•Audio Ports −1x Line in
−1x Line out
−1x Micro in
−1x Game Port
−2x CD Line in
−1x TEL Port

Specification
2-2
•I/O PORTS −Supports 2 16550 COM ports.
−Supports 1 LPT port.
−Supports 1 Floppy port.
−Supports 2 USB ports.
−Supports 1 PS/2 Mouse.
−Supports 1 PS/2 Keyboard.
•GREEN FUNCTION −Suspend mode support.
−Green switch & Green 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 −Bus Master IDE Driver.
−INTEL Patch_95 Driver.
−ESS SOLO-1 Sound Driver.
•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.)

6BXA
3-1
3. HARDWARE INSTALLATION
3.1. UNPACKING
The mainboard package should contain the following:
•The 6BXA mainboard.
•The Retention Mechanism & Attach Mount
•USER'S MANUAL for mainboard.
•Cable set for IDE, Floppy devices.
•CD or diskette for Mainboard¡BSound and VGA Utility.
The mainboard contains sensitive electric components, which can be easily
damaged by static electricity, so the mainboard 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 mainboard 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 mainboard 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
6BXA
ESS
SOLO-1
INTEL
443BX
PIIX4
BIOS
SLOT1
JP11
JP7CN 6
JP4
USB
PS/2
JP18
JP9
BAT1
J12
JP12
IR
J9
JP5
SW2
SW1
IDE 2
IDE 1
ATX POWER
FLOPPY
BANK 0
BANK 1
BANK 2
GAME&AUDIO
COM A
COM B
LPT
BZ1
JP17
JP20
× Figure 3.1 Ø
3.3. QUICK REFERENCE FOR JUMPERS & CONNECTORS
tI/O Ports Connector
USB USB port.
IDE1 For Primary IDE port.
IDE2 For Secondary IDE port.
FLOPPY For Floppy port
PS/2 For PS/2 Keyboard / Mouse port.
COMB For Serial port2 (COM B).
COMA For Serial port1 (COM A).
LPT For LPT port.
GAME For GAME port.
ATX Power
For ATX Power Connector.
AUDIO For MIC,LINE-IN,LINE-OUT port.
tSlot 1
For PentiumII / Celeron processor installed

6BXA
3-3
tJP4 : System Acceleration
Pin No Function
1-2 short For 100MHz Turbo and other frequencies
2-3 short For 100MHz Normal
tJ3:CPU FAN (CPU cooling FAN Power Connector)
Pin No. Function
1GND.
2+12V
3Signal
tJP10 : Wake on Lan
Pin No. Function
1+5V SB
2GND
3Signal
tJ2 : PWR FAN (Power Fan Connector)
Pin No. Function
1GND
2+12V
3Signal
tJ9: PANEL(SYS) FAN Connector
Pin No. Function
1GND.
2+12V
3Signal
tJ12 : ATX Power Control Selection
Pin No. Function
Open Soft off.
Short Full on.
tJP12 : RING Power On
Pin No. Function
1Signal.
2GND.

Hardware Installation
3-4
tJP13 : Clear CMOS
Pin No. Function
1-2 Short Clear CMOS.
2-3 Short NORMAL.
tJP18 / JP19 : Onboard Sound Function Selection
Pin No. Function
1-2 Close Onboard Sound Function Enabled.
2-3 Close Onboard Sound function Disabled.
tJP17 : Onboard Sound Function Selection
Pin No. Function
1.2 & 3.4 Open Onboard Sound Function Enabled.
1.2 & 3.4 Close Onboard Sound function Disabled.
tJP1 : Keyboard Power On Selection
Pin No. Function
1-2 Close Enabled Keyboard power on.
2-3 Close Disabled Keyboard power on.
tJP11 : CASE OPEN (Optional)
Pin No. Function
1Signal
2GND
tIR: INFRARED Connector (OPTIONAL)
Pin No. Function
1IR Data Output
2GND
3IR Data Input
4NC
5POWER (+)
tJP14: Suspend To RAM Function (Optional)
Pin No. Function
Short Enabled Suspend To RAM Function
Open Normal Operation

6BXA
3-5
tJP16: PCI Bus Freq.Select (133MHz only)
Pin No. Function
Open 133MHz PCI 33MHz
Close 133MHz PCI 44MHz
tJP20 : TEL:The Connector is for Modem with internal Voice connector
Pin No. Function
1Signal
2GND
3GND
4Signal
tSB-LINK : For PCI Audio / Sound Card use only (Optional)
Pin No. Function
1Signal
2GND
3NC
4Signal
5GND
6Signal
tCN6 : CD Audio Line In
Pin Function
1GND
2Right
3GND
4Left
tJP7 : CD Audio Line In
Pin Function
1Right
2GND
3GND
4Left

Hardware Installation
3-6
JP5 : For 2X11 PINs Jumper
PW: Soft Power Connector
Open: Normal Operation
Short: Power On/Off
RES: Reset Switch
Open: Normal Operation
Short: For Hardware Reset System
P+P − P − : Power LED
PIN 1 : anode (+)
PIN 2 : cathode (−)
PIN 3 : cathode (−)
SPK: Speaker Connector
PIN 1 : VCC
PIN 2 : VCC
PIN 3 : Data
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
1
1
1
PW P+P
−
P
−
HD
RES
S P K
GN
GD
JP5
1
1
1
+
−
+
−

6BXA
3-7
GD: Green LED
PIN 1 : LED anode (+)
PIN 2 : LED cathode ( − )
3.4. DRAM INSTALLATION
The mainboard can be installed with 16 / 32 / 64 / 128 / 256 MB 168 pins
DIMM module DRAM, and the DRAM speed must be 50 or 60 ns for EDO &
67~100 MHz for SDRAM. The DRAM memory system on mainboard consists
of bank 0 ,bank 1& bank 2.
Since 168 pins DIMM module is 64 bits width, using 1 PCS which can match a
64 bits system. The total memory size is 16MB ~ 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 couldn't be inserted into socket completely.
3.5. CPU SPEED SETUP
The default system bus speed is 66/100MHz. The user can change the DIP
SWITCH (SW2) selection to set up the CPU speed for 233 - 633MHz
processor. The CPU speed must match with the frequency RATIO. It will
cause system hanging up if the frequency RATIO is higher than CPU's.
SW1:
CPU AGP PCICLK 1 23 4
66 66 33.4 ON OFF OFF ON
75 75 37.5 ON ON OFF ON
83 86 41.65 ON OFF ON ON
100 66 33.43 OFF OFF OFF OFF
112 75 37.33 OFF ON OFF OFF
133 89 44.33 OFF OFF ON OFF
1

Hardware Installation
3-8
SW2:
CLK RATIO 1 23 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
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 mainboard.
M Note: We don’t recommend you to setup your system speed to 75, 83,
112 or 133MHz because these frequencies are not the standard
specifications for CPU, Chipset and most of the peripherals.
Whether your system can run under 75, 83, 112 or 133MHz
properly will depend on your hardware configurations: CPU,
SDRAM, Cards, etc.
3.6. CMOS RTC & ISA CFG CMOS SRAM
The mainboard contains RTC & CMOS SRAM on board. They have a power
supply from external battery to keep the DATA inviolate & effective. The RTC
is a REAL-TIME 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 when it has consumed.
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.

6BXA
3-9
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 press and
released by user. The RESET switch is a 2 PINS connector and should be
installed to RES on mainboard.
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 LED of mainboard 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.
3.11. PERIPHERAL DEVICE INSTALLATION
After the I/O device installation and jumpers setup, the mainboard can be
mounted into the case and fixed by screw. To complete the mainboard
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.PS/2 KEYBOARD & MOUSE INSTALLATION
The main board supports PS/2 Mouse. 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.