GA - 686LX USER'S MANUAL Pentium II Processor MAINBOARD REV.
GA-686LX 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.
Table of Contents TABLE OF CONTENTS 1. INTRODUCTION .............................................................................................................1-1 1.1. PREFACE ..................................................................................................................1-1 1.2. KEY FEATURES .......................................................................................................1-1 1.3. PERFORMANCE LIST ....................................................................
GA-686LX 4.2. CONTROL KEYS.......................................................................................................4-2 4.3. GETTING HELP ........................................................................................................4-3 4.3.1. Main Menu ......................................................................................................4-3 4.3.2. Status Page Setup Menu / Option Page Setup Menu .....................................4-3 4.4. THE MAIN MENU ...............
Table of Contents APPENDIX E: FCC DOCUMENT........................................................................................
Introduction 1. INTRODUCTION 1.1. PREFACE Welcome to use the GA - 686LX motherboard. The motherboard is a Pentium II 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.
GA-686LX q ATX form factor, Double stack I/O connector, 4 layers PCB. 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.
Introduction Hi-End 30.6 32.6 1.4. BLOCK DIAGRAM AGP SLOT 3.3V EDO/SDRAM DIMM Sockets Host Bus SLOT1 AGP Bus PAC 82443LX CHIPSET DRAM Bus PCI Bus 33MHz 66MHz 66MHz CLOCK GEN SC652EY B 33MHz Ultra DMA/33 IDE Ports 33MHz 14.318MHz PCI Bus IDE Bus 8MHz 48MHz PIIX4 82371AB CHIPSET 66MHz 14.318MHz 66MHz 24MHz USB Bus USB #1 ISA Bus USB #2 COM Ports I/O 8661 CIPSET LPT Port Floppy Port PS/2 Keyboard KBC 8042 ISA Slots 1-3 PS/2 Mouse 14.
GA-686LX 1.5.
Introduction Figure 3:Heatsink / FAN & Heat sink support for OEM Pentium II Processor Figure 4:Boxed Pentium II Processor & Heat sink support 1-5
GA-686LX 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-bit 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).
Specification 2. SPECIFICATION 2.1. HARDWARE • CPU − Pentium II processor 233 – 633 MHz. − 242 pins 66MHz slot1 on board. • PROTECTION − Onboard Buzzer Alarm when detect "CPU FAN Failure" or “ CPU Overheat” . − Automatically slow down CPU speed when "CPU FAN Failure" or "CPU Overheat". − Intel LDCM support. − H/W monitor power status (±5V, ±12V, CPU voltage & CMOS battery voltage). • SPEED − 66 MHz system speed. − 66 MHz AGP bus speed. (133MHz 2*mode) − 33 MHz PCI-Bus speed.
GA-686LX • I/O PORTS − Supports 2 16550 COM ports. (Using IRQ4, 3) − Supports 1 EPP/ECP LPT port. (Using IRQ7 or 5 and DMA3 or 1) − Supports 1 1.44/2.88 MB Floppy port. (Using DMA2 & IRQ6) − Supports 2 USB ports. − Supports PS/2 Mouse. (Using IRQ12 ) − Supports PS/2 Keyboard. (Using IRQ1 ) • GREEN FUNCTION − Suspend mode support. − Green switch & LED support. − IDE & Display power down support. − Monitor all IRQ / DMA / Display / I/O events. • BIOS − 256KB FLASH EEPROM.
Hardware Installation 3. HARDWARE INSTALLATION 3.1. UNPACKING The mainboard package should contain the following: • The GA - 686LX mainboard. • The Retention Mechanism & Attach Mount • USER'S MANUAL for mainboard. • Cable set for IDE & Floppy device. • Diskette or CD for Mainboard 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.
GA-686LX separate. 3.2. MAINBOARD LAYOUT CN1COMA COMBCN2 LPT CN3 USB KB Mouse CN4 CN5 J1 HT1 J2 FAN POWER JP2 PCI4 PCI3 PCI2 PCI1 BUZZER1 SLOT6 SLOT4 AGP1 371AB PIIX4 SLOT2 BIOS 4 3 2 1 RESET SPEAKER J3 Bank 3 Bank 2 Bank 1 Bank 0 DIMM4 DIMM3 DIMM2 DIMM1 BAT1 S1 HD-LED IR J6 J7 J1 J5 ATX POWER1 GA-686LX GN-SW PWR-ON J8 J9 CN6 IDE2 CN7 IDE1 FLOPPY PWR-LED ×Figure 3.1Ø 3.3.
Hardware Installation For Pentium II processor installed. t J2: CPU cooling FAN Power Connector Pin No. Function 1 GND. 2 +12V 3 SENSE t J3: SPEAKER Connector Pin No. 1 VCC 2 NC. 3 NC. 4 Output t t Function J4: RESET Switch Pin No. 1 RESET Input 2 GND Function J5: POWER ON LED (PW-LED) Pin No. 1 LED POWER (+) 2 NC 3 GND (-) Function t J6: Hard Disk active LED (HD-LED) Pin No.
GA-686LX 5 POWER (+) t J8: GN-SW On – Off for enter suspend Green Mode. t J9: Soft Power Switch On – Off for POWER ON or Suspend IN / OUT. On 4 sec. For POWER OFF before VGA Enable or CMOS setup select “ delay 4sec.” For POWER OFF mode. t t J10: Green LED OFF Normal mode ON Suspend mode S1: CPU INT. / EXT. FREQ. RATIO CPU TYPE 1 2 200MHz OFF ON 233MHz ON ON 266MHz OFF OFF 300MHz ON OFF 333MHz OFF ON 366MHz ON ON 3 OFF OFF ON ON ON ON 4 OFF OFF OFF OFF OFF OFF CLK RATIO X3 X3.5 X4 X4.5 X5 X5.
Hardware Installation EDO & 67~100 MHz for SDRAM. The DRAM memory system on mainboard consists of bank 0, 1, 2 & bank 3. Each bank consists of 3 PCS 168 pins DIMM module DRAM. Because the 168 pins DIMM module is 64 bits width, using 1 PCS which can match a 64 bits system. The total memory size is 8 MB ~ 1 GB EDO / 512MB 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.
GA-686LX the system can automatically boot OS. every time. Due to the life-time of Battery internal battery is 5 years, the user can change a new Battery to replace old one after it can not work. 3.7. SPEAKER CONNECTOR INSTALLATION There is always a speaker in AT system for sound purpose. The 4 - Pins connector J3 is used to connect speaker. The speaker can work well in both direction of connector when it is installed to the connector J3 on mainboard. 3.8.
