Gigabyte GA-6BXU User manual

R-01-02-081003
6BXU
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 100~300 mA 5V Stand-By current (rest
with keyboard require), you can power on your system by
entering password from the Keyboard after setting the
“Keyboard power on”jumper (JP1) and password in CMOS
Setup.
3. Modem Ring-On on COM B.
4. Wake-up on LAN supports (Your ATX power supply must
support larger than 720 mA 5V Stand-By current).
5. Support 3 steps ACPI LED.
6. Support LDCM

Pentium

II Processor MAINBOARD

Table of Contents
2
REV. 1.0 Second Edition

6BXU
1
The author assumes no responsibility for any errors or omissions that 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.
Oct 03, 1998 Taipei, Taiwan

Quick Installation Guide
2
I. Quick Installation Guide :
CPU SPEED SETUP
The system bus speed can be selectable between 66 MHz and 100MHz. The
user can select the system bus speed (JP5) and change the DIP SWITCH (SW)
selection to set up the CPU speed for 200 - 633MHz processor.
M The CPU speed must match with the frequency RATIO. It will cause
system hanging up if the frequency RATIO is higher than CPU's.
DIP SWITCH (SW)
FREQ. RATIO 1234
X 3 ON OFF ON ON
X 3.5 OFF OFF ON ON
X 4 ON ON OFF ON
X 4.5 OFF ON OFF ON
X 5 ON OFF OFF ON
X 5.5 OFF OFF OFF ON
MJP5 (Select the system speed between 66 Hz and 100MHz)
1-2 Close Set system speed to 66MHz
− system always
run at 66MHz FSB (Front Side Bus).
2-3 Close Set system speed to Auto
− auto detect system
speed (66/ 100MHz FSB)
1-2-3 Open Set system speed to 100MHz
− system always
run at 100MHz FSB (Front Side Bus).
1 2 3
1 2 3
1 2 3

6BXU
3
MThere are two ways to set system speed
A. 66MHz forced (JP5 1-2 short) or Auto detect (2-3 short)
B. 100MHz forced (JP5 1-2-3 open) or Auto detect (2-3 short)
1. PentiumII 300 / 100MHz FSB
6BXU
BIOS
INTEL
443BX
PIIX4
Adaptec
AIC-7890
ON
1 2 3 4
CPU
JP5
1 2 3
JP5
1 2 3
OFF
2. PentiumII 350 / 100 MHz FSB
3. PentiumII 400 / 100 MHz FSB
SW
ON
1 2 3 4
OFF JP5
1 2 3 JP5
1 2 3
SW
ON
1 2 3 4
OFF JP5
1 2 3 JP5
1 2 3

Quick Installation Guide
4
4. PentiumII 450 / 100 MHz FSB
5. PentiumII 500 / 100 MHz FSB
6. PentiumII 550 / 100 MHz FSB
7. PentiumII 233 / 66 MHz FSB
8. PentiumII 266 / 66 MHz FSB
SW
ON
1 2 3 4
OFF JP5
1 2 3 JP5
1 2 3
SW
ON
1 2 3 4
OFF JP5
1 2 3 JP5
1 2 3
SW
ON
1 2 3 4
OFF JP5
1 2 3 JP5
1 2 3
SW
ON
1 2 3 4
OFF JP5
1 2 3 JP5
1 2 3
SW
ON
1 2 3 4
OFF JP5
1 2 3 JP5
1 2 3

6BXU
5
9. PentiumII 300 / 66 MHz FSB
10. PentiumII 333 / 66 MHz FSB
11. PentiumII 366 / 66 MHz FSB
F For 133MHz Jumper Setting:
6BXU
BIOS
INTEL
443BX
PIIX4
Adaptec
AIC-7890
CPU
JP5
1 2 3
JP4
« Note: We don’t recommend you to setup your system speed to 133MHz
because this frequencies is not the standard specifications for
CPU, Chipset and most of the peripherals. Whether your system
can run under 133MHz properly will depend on your hardware
configurations: CPU, SDRAM, Cards, etc.
SW
ON
1 2 3 4
OFF JP5
1 2 3 JP5
1 2 3
SW
ON
1 2 3 4
OFF JP5
1 2 3 JP5
1 2 3
SW
ON
1 2 3 4
OFF JP5
1 2 3 JP5
1 2 3

Quick Installation Guide
6
II. Jumper setting :
SPK : Speaker Connector
6BXU
BIOS
INTEL
443BX
PIIX4
Adaptec
AIC-7890
CPU
SW
1
Pin No. Function
1
2
VCC
NC3NC
4Data
+–
RST : Reset Switch
6BXU
BIOS
INTEL
443BX
PIIX4
Adaptec
AIC-7890
CPU
SW
Open :
Normal operation.
For Hardware
Reset System
Close :

6BXU
7
PWR : Power LED Connector
6BXU
BIOS
INTEL
443BX
PIIX4
Adaptec
AIC-7890
CPU
SW
1
Pin No. Function
1
2
3
LED (+)
LED (-)
LED (-)
+
HD : IDE Hard Disk Active LED
6BXU
BIOS
INTEL
443BX
PIIX4
Adaptec
AIC-7890
CPU
SW
1
Pin No. Function
1
2LED (+) LED (-)
+

Quick Installation Guide
8
IR : Infrared Connector (Optional)
6BXU
BIOS
INTEL
443BX
PIIX4
Adaptec
AIC-7890
CPU
SW
Pin No.
Function
1
2
IR Data Output
IR Data Input
3
GND
4
5
Signal
POWER (+)
1
GN : Green Function Switch
6BXU
BIOS
INTEL
443BX
PIIX4
Adaptec
AIC-7890
CPU
SW
Open :
Normal operation.
Close :
Entering Green Mode