ATX GA–686BLX USER'S MANUAL

GA – 686BLX

USER'S MANUAL

1. System power on by PS/2 Mouse: If you are using ATX
power supply, you are able to power on the system by
double clicking your PS/2 Mouse right or left button.

2. System power on by Keyboard: If your ATX power supply
supports 1 ampere 5V Stand-By function, you can choose to
power on your system by entering the password or just
press any key with the AT keyboard.

3. Modem Ring-On on COM B.

4. Wake-up on LAN supports.(on J9

5. Support 3 or 4 steps ACPI LED.

Pentium II Processor MAINBOARD

REV. 1.0 Second Edition

)

GA-686BLX

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.

OCTOBER 17, 1997 Taipei, Taiwan

1

Quick Installation Guide

I. Quick Installation Guide :

CPU SPEED SETUP

The system's speed is fixed to 66.6MHz. The user can change the DIP
SWITCH (SW) selection to set up the CPU speed for 200 - 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.

DIP SWITCH (SW)

1 2 3 4

OFF ON OFF OFF 3 66 200 Pentium

ON ON OFF OFF 3.5 66 233 Pentium

OFF OFF ON OFF 4 66 266 Pentium

ON OFF ON OFF 4.5 66 300 Pentium

OFF ON ON OFF 5 66 333 Pentium

ON ON ON OFF 5.5 66 366 Pentium

FREQ.

RATIO

EXT.CLK.

MHz

INT.CLK.

MHz

CPU Type



II 200 MHz



II 233 MHz



II 266 MHz



II 300 MHz



II 333 MHz



II 366 MHz

2

GA-686BLX

PIIX4

1

PIIX4

1

1. Pentium II 200 MHz

++ + +

4
3
2

ON OFF

SW

2. Pentium II 233 MHz

+ ++ +

4
3
2

ON OFF

SW

1

1

GA-686BLX

1

11

1

1

1

1

82443LX

1

1

1

1

1

GA-686BLX

1

11

1

1

1

1

82443LX

1

1

1

3

3. Pentium II 266 MHz

PIIX4

1

1

1

PIIX4

1

1

1

++ + +

4
3
2

ON OFF

SW

4. Pentium II 300 MHz

++ + +

Quick Installation Guide

1

GA-686BLX

1

11

1

1

1

82443LX

1

1

1

ON OFF

SW

4
3
2

1

GA-686BLX

1

11

1

1

1

82443LX

1

1

1

4

GA-686BLX

PIIX4

1

1

1

PIIX4

1

1

1

5. Pentium II 333 MHz

++ + +

4
3
2

ON OFF

SW

6. Pentium II 366 MHz

++ + +

1

GA-686BLX

1

11

1

1

1

82443LX

1

1

1

ON OFF

SW

4
3
2

1

GA-686BLX

1

11

1

1

1

82443LX

1

1

1

5

II. Jumper setting :

PIIX4

1111

1

+++

+

PIIX4

1

1

PWR : Power LED / Key-Lock Connector

1

++ + +

Quick Installation Guide

1

Pin No.

1
2
3

4
5

Function
LED anode (+)
NC

LED cathode (-)

Key Lock

GND

1

SPK : Speaker Connector

1

Pin No.

Function

1

VCC

2

NC

3

NC

4

Data

1

GA-686BLX

GA-686BLX

1

82443LX

82443LX

1

1

1

1

1

1

1

1

1

1

1

1

1

6

GA-686BLX

PIIX4

11111

1

PIIX4

1

1

TD : Turbo LED Connector

++ + +

1

1

1
2

Function

LED anode (+)
LED cathode (-)

Pin No.

TB : Turbo Switch Connector

++ + +

Function Reserved

11

GA-686BLX

GA-686BLX

1

82443LX

82443LX

1

1

1

1

1

1

1

1

1

1

1

1

7

RST : Reset Switch

PIIX4

1

1

Normal operation.

PIIX4

1

1

Open :

1

Normal operation.

Quick Installation Guide

++ + +

1

GA-686BLX

For Hardware

1

Reset

11

1

GN : Green Function Switch

++ + +

Open :

1

Close:

1

Enterning Green

11

1

GA-686BLX

1

82443LX

82443LX

1

1

1

1

1

1

1

1

1

1

1

1

8

GA-686BLX

PIIX4

11111

1

PIIX4

1

1

HD : IDE Hard Disk Active LED

++ + +

Pin No.

1
2

1

Function

LED anode (+)

LED cathode (-)

Soft PWR : Soft Power Connector

1

++ + +

GA-686BLX

82443LX

1

1

1

1

1

1

Pin No. Function

1

GND

2 CTRL-Signal

1

GA-686BLX

1

11

1

1

1

82443LX

1

1

1

9

POWER : Power Connector

PIIX4

1

1

12345

PIIX4

1

1

Quick Installation Guide

1

++ + +

Pin No. Function

1

Power Good
VCC (+5V)

2,10,11,12

+12V

3

-12V

4

5,6,7,8

GND

-5V9

J3 : Keyboard Connector

++ + +

1

GA-686BLX

1

11

1

1

1

82443LX

1

1

1

Pin No.

1
2
3
4
5

Function

Key Clock.
Key Data
NC
VCC (+5V)
GND

1

GA-686BLX

1

11

1

1

1

82443LX

1

1

1

10

GA-686BLX

PIIX4

11111

1

PIIX4

1

1

J2 : CPU Cooling Fan Power Connector

++ + +

1

1

Pin No.

Function

1

GND

2

+12V

SENSE

3

IDE1: For Primary IDE port

++ + +

RED LINE

1

11

GA-686BLX

GA-686BLX

1

82443LX

82443LX

1

1

1

1

1

1

1

1

1

1

1

1

11

IDE2: For Secondary IDE port

PIIX4

1

1

PIIX4

1

1

++ + +

Quick Installation Guide

RED LINE

1

J5 : FLOPPY PORT

++ + +

RED LINE

1

1

GA-686BLX

1

11

1

1

1

82443LX

1

1

1

1

GA-686BLX

1

11

1

1

1

82443LX

1

1

1

12

GA-686BLX

PIIX4

1

1

PIIX4

1

1

J8 : LPT PORT

++ + +

RED LINE

1

J6 : COM B

1

RED LINE

11

1

++ + +

GA-686BLX

1

GA-686BLX

82443LX

1

1

1

1

1

1

1

1

11

1

1

1

82443LX

1

1

1

13

J7: COM A

PIIX4

Disable Keyboard Power On.

Enable Keyboard Power On.

PIIX4

1

1

RED LINE

Quick Installation Guide

++ + +

1

1

GA-686BLX

1

11

1

1

82443LX

1

1

1

1

1

JP6 : Keyboard Power On

++ + +

1

Open :

1

Close :

11

1

1

1

GA-686BLX

1

1

1

82443LX

1

1

1

14

GA-686BLX

PIIX4

1

PIIX4

1

1

POWER1: ATX POWER Connector

++ + +

1

Pin No.

3,5,7,13,15-17

4,6,19,20

10
12
18

8
9

14

Function

GND

VCC (+5V)

+12V

-12V

-5V

Power Good
5V SB

(Stand by +5V)
PS-ON

(Soft ON/OFF)

J2 : PS/2 MOUSE

1

RED LINE

++ + +

11

GA-686BLX

1

11

1

1

1

1

82443LX

1

1

1

1

GA-686BLX

1

1

1

82443LX

1

1

1

1

15

CN3: USB Port

PIIX4

11111

1

PIIX4

11111

1

Function

Pin No.

VCC

1
2

SBV 0-

3

SBV 0+

GND

4

VCC

5

SBV1-

6
7

SBV1+

8

GND

J9: Wake on Lan

++ + +

++ + +

GA-686BLX

Quick Installation Guide

1

1

82443LX

1

1

1

1

Pin No.

1
2

3

Function
+5V SB

GND

Signal

1

1

1

GA-686BLX

1

1

1

82443LX

1

1

16

GA-686BLX

PIIX4

11111

1

1

PIIX4

11111

1

1

+++

+

J17: ACPI LED Selection

++ + +

1

Normal: short: 4 steps
open: 3 steps.

Function

Pin No.

Signal

1
2

GND

J10: System After Ac Back

GA-686BLX

82443LX

1

1

1

1

1

1

1

Normal:Open: Soft Off
Short: Full on/Soft Off

Function

Pin No.

Signal

1
2

GND

GA-686BLX

17

82443LX

1

1

1

1

1

1

Quick Installation Guide

PIIX4

1111

1

+++

+

¡ô¡õ¡÷¡ö

J16: For PCI Audio / Sound Card use only

1

5
6

Pin No.

1
2

3
4
5
6

2

Function
Signal
GND

NC

Signal

GND

Signal

1

1

1
256

GA-686BLX

1

82443LX

1

III. Top Performance Test Setting:

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

ROM PCI / ISA BIOS

CHIPSET FEATURES SETUP

AWARD SOFTWARE, INC.

Auto Configuration
DRAM Speed Selection : Fast
Memory Buffer Strength : Middle
DRAM Data Integrity Mode
Video RAM Cacheable : Disabled
16 Bit I/O Recovery Time : 1
Memory Hole At 15M-16M : Disabled
Delayed Transaction : Disabled
SDRAM RAS-to-CAS Delay
SDRAM RAS Precharge Time
SDRAM CAS latency Time : 2

: Enabled

: Non-ECC

: Fast
: Fast

Power-Supply Type : Auto
CPU Temperature Select

: 70¢J/158
Slow Down CPU Duty Cycle : Normal
Alarm When Overheat : Disabled
Fan Failure Control : Disabled
CPU Fan Status : XXXX
CPU Temperature : OK
Power Supply +12V
Power Supply -12V
Power Supply +5V
Power Supply -5V
Battery Status
CPU VCore Voltage

: Quit

F1

: Help

F5

: Old Values

PU/PD/+/­(Shift)F2

: OK

: OK

: OK

: OK

: OK

: 2.8V

: Select ItemESC
: Modify
: Color

F7 : Load Setup Defaults

¢K

1

1

1

18