Gigabyte GA-686DX User Manual
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Gigabyte GA-686DX User Manual

Gigabyte GA-686DX User Manual

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GA - 686DX
USER'S MANUAL
Dual PENTIUMâ PCI - ISA BUS MAINBOARD
REV. 1 First Edition

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Summary of Contents for Gigabyte GA-686DX

  • Page 1 GA - 686DX USER'S MANUAL Dual PENTIUMâ PCI - ISA BUS MAINBOARD REV. 1 First Edition...
  • Page 2 GA-686DX 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. IBM PC/AT, PC/XT are trademarks of International Business Machine Corporation. PENTIUM is a trademark of Intel Corporation.

  • Page 3: Table Of Contents

    Table of Contents INTRODUCTION..................1 1.1. PREFACE....................1 1.2. KEY FEATURES..................1 1.3. PERFORMANCE LIST................2 1.4. BLOCK DIAGRAM..................3 1.5. INTRODUCE THE PCI - BUS..............4 1.6. FEATURES....................4 SPECIFICATION..................1 2.1. HARDWARE...................1 2.2. SOFTWARE...................2 2.3. ENVIRONMENT..................2 HARDWARE INSTALLATION..............1 3.1. UNPACKING..................1 3.2. MAINBOARD LAYOUT................2 3.3. QUICK REFERENCE FOR JUMPERS & CONNECTORS....2 3.4.
  • Page 4 GA-686DX 4.3.2. Status Page Setup Menu / Option Page Setup Menu....3 4.4. THE MAIN MENU...................3 4.5. STANDARD CMOS SETUP MENU............5 4.6. BIOS FEATURES SETUP..............9 4.7. CHIPSET FEATURES SETUP...............13 4.8. POWER MANAGEMENT SETUP............15 4.9. PNP/PCI CONFIGURATION..............17 4.10. INTEGRATED PERIPHERALS............18 4.11. LOAD SETUP DEFAULTS..............21 4.12.

  • Page 5: Introduction

    Introduction INTRODUCTION 1.1. PREFACE Welcome to use the GA - 686DX motherboard. The motherboard is a Dual PENTIUMâ Pro Processor based PC / AT compatible system with ISA bus and PCI Local 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.

  • Page 6: Performance List

    GA-686DX ATX form factor, 6 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 &...

  • Page 7: Block Diagram

    Introduction 1.4. BLOCK DIAGRAM...

  • Page 8: Introduce The Pci - Bus

    GA-686DX 1.5. INTRODUCE THE PCI - BUS Connecting devices to a CPU local bus can dramatically increase the speed of I/O-bound peripherals with only a slight increase in cost over traditional systems. This price / performance point has created a vast market potential for local bus products.
  • Page 9 Introduction CPU independent.

  • Page 10: Specification

    Specification SPECIFICATION 2.1. HARDWARE · Dual Pentiumâ Pro processor 150 - 200 MHz. Pentiumâ Pro OverDriveâ processor (P6T). Two 387 pins (socket 8) ZIF socket on board. · Included in Pentium. COPROCESSOR · 60 / 66 MHz system speed. SPEED 30 / 33 PCI-Bus speed.

  • Page 11: Software

    GA-686DX · Supports 2 16550 COM ports. (Using IRQ4, 3) I/O PORTS 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 PS/2 Mouse. (Using IRQ12 ) Supports PS/2 Keyboard.
  • Page 12 Specification · Vibration 0 to 1,000 Hz. · Electricity 4.9 V to 5.2 V. Max. 20A current at 5V.

  • Page 13: Hardware Installation

    Hardware Installation HARDWARE INSTALLATION 3.1. UNPACKING The mainboard package should contain the following: · The GA - 686DX mainboard. · USER'S MANUAL for mainboard Installation. · Cable set for IDE & Floppy device. · Diskette for BUS MASTE ATAPI device. 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.

  • Page 14: Mainboard Layout

    GA-686DX It is assumed that the chassis is designed for a standard IBM XT/AT mainboard mounting. Place the chassis on the anti-static mat and remove the cover. Take the plastic clips, Nylon stand-off and screws for mounting the system board, and keep them separate.
  • Page 15 Hardware Installation For Keyboard I/O port. For PS/2 Mouse port. USB port (option). For Primary IDE port. For Secondary IDE port. For Floppy port J1: SPEKER Connector Pin No. Function Output J2: RESET Switch (RST) Pin No. Function RESET Input J3: POWER ON LED (PW-LED) Pin No.
  • Page 16 GA-686DX POWER (+) J6: GN-SW Pin No. Function Close Force system to enter Green Mode (Suspend mode). Open Normal Operation. J7: ATX Power On/Off Pin No. Function Close & This is the soft switch (Power On/Off) of ATX Power Supply, Open Close &...

  • Page 17: Dram Installation

    Hardware Installation 4,6,19,20 VCC (+5V) +12V -12V Power Good 5V SB (Stand by +5V) PS-ON (Soft ON/OFF) 3.4. DRAM INSTALLATION The mainboard can be installed with 4 / 8 / 16 / 32 / 64 / 128 MB 72 pins SIMM module DRAM, and the DRAM speed must be 60 or 70 ns.

  • Page 18: Cmos Rtc & Isa Cfg Cmos Sram

    GA-686DX OFF 2.5 PENTIUM Pro 150 MHz OFF 2.5 PENTIUM Pro 166 MHz OFF 3 PENTIUM Pro 180 MHz OFF 3 PENTIUM Pro 200 MHz OFF 3.5 PENTIUM Pro 233 MHz ON 4 PENTIUM Pro 266 MHz 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.

  • Page 19: Green Function Installation

    Hardware Installation There are a system power LED lamp on the panel of case. The power LED will light on when system is powered-on, which is connected to a 3 PIN connector. The connector should be connected to J3 of mainboard in correct direction.

  • Page 20: Keyboard Setting Function

    GA-686DX The BIOS will auto detect whether the PS/2 Mouse is installed or nor & assign IRQ12 for Mouse port if which was installed. After installing the peripheral device, the user should check everything again, and prepare to power-on the system.

  • Page 21: Bios Configuration

    GA-686DX BIOS CONFIGURATION Award's BIOS ROM has a built-in Setup program that allows users to modify the basic system configuration. This type of information is stored in battery-backed CMOS SRAM so that it retains the Setup information when the power is turned off.

  • Page 22: Control Keys

    BIOS Configuration 4.2. CONTROL KEYS Up arrow Move to previous item Down arrow Move to next item Left arrow Move to the item in the left hand Right arrow Move to the item in the right hand Esc key Main Menu - Quit and not save changes into CMOS Status Page Setup Menu and Option Page Setup Menu - Exit current page and return to Main Menu PgUp key...

  • Page 23: Main Menu

    GA-686DX 4.3.1. Main Menu The on-line description of the highlighted setup function is displayed at the bottom of the screen. 4.3.2. Status Page Setup Menu / Option Page Setup Menu Press F1 to pop up a small help window that describes the appropriate keys to use and the possible selections for the highlighted item.
  • Page 24 BIOS Configuration · Standard CMOS setup This setup page includes all the items in a standard compatible BIOS. · BIOS features setup This setup page includes all the items of Award special enhanced features. · Chipset features setup This setup page includes all the items of chipset special features. ·...

  • Page 25: Standard Cmos Setup Menu

    GA-686DX Abandon all CMOS value changes and exit setup. 4.5. STANDARD CMOS SETUP MENU The items in Standard CMOS Setup Menu (Figure 4.2) are divided into 9 categories. Each category includes no, one or more than one setup items. Use the arrows to highlight the item and then use the <PgUp> or <PgDn>...
  • Page 26 BIOS Configuration year The year, from 1900 through 2099 · Time The time format in <hour> <minute> <second>. The time is calculated base on the 24-hour military-time clock. For example, 1 p.m. is 13:00:00. · Primary HDDs / Secondary HDDs The category identify the types of hard disk drive C drive F 4 devices that has been installed in the computer.
  • Page 27 GA-686DX HEADS number of heads PRECOMP write precomp LANDZONE landing zone SECTORS number of sectors If a hard disk has not been installed select NONE and press <Enter>. · Drive A type / Drive B type The category identify the types of floppy disk drive A or drive B that has been installed in the computer.
  • Page 28 BIOS Configuration EGA/VGA Enhanced Graphics Adapter/Video Graphics Array. For EGA, VGA, SVGA, or PGA monitor adapters CGA 40 Color Graphics Adapter, power up in 40 column mode CGA 80 Color Graphics Adapter, power up in 80 column mode MONO Monochrome adapter, includes high...

  • Page 29: Bios Features Setup

    GA-686DX The BIOS determines how much extended memory is present during the POST. This is the amount of memory located above 1 MB in the CPU's memory address map. Expanded Memory Expanded Memory in memory defined by the Lotus/Intel/Microsoft (LIM) standard as EMS.
  • Page 30 BIOS Configuration Figure 4.3: BIOS Features Setup · Virus Warning This category flashes on the screen. During and after the system boots up, any attempt to write to the boot sector or partition table of the hard disk drive will halt the system and the following error message will appear, in the mean time, you can run anti-virus program to locate the problem.
  • Page 31 GA-686DX · Quick Power On Self Test This category speeds up Power On Self Test (POST) after you power on the computer. If it is set to Enable, BIOS will shorten or skip some check items during POST. The default value is Enabled.
  • Page 32 BIOS Configuration Keypad is arrow keys · Typematic Rate Setting The default value is Disabled. Enabled Enable Keyboard typematic rate setting. Disabled Disable Keyboard typematic rate setting. · Typematic Rate (Chars/Sec) The default value is 6. 6-30 Set the maximum typematic rate from 6 chars. per second to 30 chars.

  • Page 33: Chipset Features Setup

    GA-686DX The default value is Enable. Enabled Video shadow is enabled Disabled Video shadow is disabled · PCI/VGA Palette Snoop The default value are Disabled. Enabled For having Video Card on ISA Bus and VGA Card on PCI Bus. Disabled For VGA Card only.
  • Page 34 BIOS Configuration Figure 4.4: Chipset Features Setup · Auto Configuration The default value is Disable. Enable For 60~70ns DRAM Timing. Disable For slow speed DRAM Timing. · DRAM Slow speed selection The default value is 6/70ns. 6/70ns For 60~70ns DRAM. 60ns For 60ns DRAM (The best performance).
  • Page 35 GA-686DX · PCI VGA Burst Write The default value is Disabled. Disabled Disable this function. Enabled Enable this function to better VGA performance;while some brands of VGA must be disabled this function (e.g.ET4000W32P). · Video RAM Cacheable The default value is Disabled.

  • Page 36: Power Management Setup

    BIOS Configuration 4.8. POWER MANAGEMENT SETUP Figure 4.5: Power Management Setup · Power Management The default value is Enabled. Enabled Enable Green function. Disabled Disable Green function. Please disable Green Function for Non-S CPU in OS/2, UNIX, Window NT & Novell system.

  • Page 37: Pnp/Pci Configuration

    GA-686DX V/H SYNC + Blank BIOS will turn off V/H-SYNC when gets into Green mode for Green monitor power saving. Blank Screen BIOS will only black monitor when gets into Green mode. DPMS Support BIOS will use DPMS Standard to control VGA card.

  • Page 38: Integrated Peripherals

    BIOS Configuration Figure 4.6: PCI Slot Configuration · Resources Controlled by The default value is Manual. Manual User can set the PnP resource (I/O Address, IRQ & DMA channels) used by legacy ISA DEVICE. Auto BIOS automatically use these PnP resources. ·...
  • Page 39 GA-686DX Figure 4.7: Load Setup Defaults · IDE HDD Block Mode The default value is Enabled. Enabled Enable IDE HDD Block Mode Disabled Disable IDE HDD Block Mode · IDE Primary Master PIO (for onboard IDE 1st channel). The default value is Auto.
  • Page 40 BIOS Configuration The default value is Auto. Auto BIOS will automatically defect the IDE HDD Accessing mode. Mode0~4 Manually set the IDE Accessing mode. · IDE Secondary Slave PIO (for onboard IDE 2nd channel). The default value is Auto. Auto BIOS will automatically defect the IDE HDD Accessing mode.
  • Page 41 GA-686DX COM1/3F8 Enable onboard Serial port A and address is 3F8H. COM2/2F8 Enable onboard Serial port A and address is 2F8H. COM3/3E8 Enable onboard Serial port A and address is 3E8H. COM4/2E8 Enable onboard Serial port A and address is 2E8H.

  • Page 42: Load Setup Defaults

    BIOS Configuration 4.11. LOAD SETUP DEFAULTS Figure 4.7: Load Setup Defaults · Load SETUP Defaults To load SETUP defaults value to CMOS SRAM, enter "Y". If not, enter "N". If there is any problem occurred, loading SETUP DEFAULTS step is recommended.

  • Page 43: User Password

    GA-686DX 4.12. USER PASSWORD When you select this function, the following message will appear at the center of the screen to assist you in creating a password. ENTER PASSWORD Figure 4.8: Password Setting Type the password, up to eight characters, and press <Enter>. The password typed now will clear and previously entered password from CMOS memory.

  • Page 44: Ide Hdd Auto Detection

    BIOS Configuration 4.13. IDE HDD AUTO DETECTION Figure 4.9: IDE HDD Auto Detection Type "Y" will accept the H.D.D. parameter reported by BIOS. Type "N" will keep the old H.D.D. parameter setup. If the hard disk cylinder NO. is over 1024, then the user can select LBA mode or LARGER mode for DOS partition LARGE than 528 MB.

  • Page 45: Save & Exit Setup

    GA-686DX 4.14. SAVE & EXIT SETUP Figure 4.10: Save & Exit Setup Type "Y" will quit the Setup Utility and save the user setup value to RTC CMOS SRAM. Type "N" will return to Setup Utility. 4-25...

  • Page 46: Exit Without Saving

    BIOS Configuration 4.15. EXIT WITHOUT SAVING Figure 4.11: Exit Without Saving Type "Y" will quit the Setup Utility without saving to RTC CMOS SRAM. Type "N" will return to Setup Utility. 4-26...

  • Page 47: At Technical Information

    AT Technical Information AT TECHNICAL INFORMATION 5.1. I/O BUS CONNECTOR PIN OUT 5.1.1. ISA SLOT PIN OUT...

  • Page 48: Pci - Bus Slot Pin Out

    GA-686DX 5.1.2. PCI - BUS SLOT PIN OUT...

  • Page 49: I/O & Memory Map

    AT Technical Information 5.2. I/O & MEMORY MAP MEMORY MAP: [0000000-009FFFF] System memory used by DOS and application program. [00A0000-00BFFFF] Display buffer memory for VGA/ EGA/CGA/MONOCHROME adapter. [00C0000-00DFFFF] Reserved for I/O device BIOS ROM or RAM buffer. [00E0000-00EFFFF] Reserved for PCI device ROM. [00F0000-00FFFFF] System BIOS ROM.
  • Page 50 GA-686DX NMI: Parity check error IRQ (H/W): 0 System TIMER interrupt from TIMER-0 1 KEYBOARD output buffer full 2 Cascade for IRQ 8-15 3 SERIAL port 2 4 SERIAL port 1 5 PARALLEL port 2 6 FLOPPY DISK adapter 7 PARALLEL port 1...

  • Page 51: Rtc & Cmos Ram Map

    AT Technical Information 5.5. RTC & CMOS RAM MAP RTC & CMOS: Seconds Second alarm Minutes Minutes alarm Hours Hours alarm Day of week Day of month Month Year Status register A Status register B Status register C Status register D Diagnostic status byte Shutdown byte FLOPPY DISK drive type byte...
  • Page 52 GA-686DX Extension memory high byte 19-2d 2E-2F Reserved for extension memory low byte Reserved for extension memory high byte DATE CENTURY byte INFORMATION FLAG 34-3F Reserve 40-7f Reserved for CHIPSET SETTING DATA...

  • Page 53: Appendix A: Post Message

    GA-686DX APPENDIX A: POST MESSAGE When the BIOS encounters an error that requires the user to correct something, either a beep code will sound or a message will be displayed in a box in the middle of the screen and the message PRESS F1 TO CONTINUE, CTRL-ALT-ESC OR DEL TO ENTER SETUP will be shown in the information box at the bottom.
  • Page 54 Appendix A: Post Message Ö DISPLAY SWITCH IS SET INCORRECTLY Display switch on the motherboard can be set to either monochrome or color. This indicates the switch is set to a different setting than indicated in Setup. Determine which setting is correct, and then either turn off the system and change the jumper, or enter Setup and change the VIDEO selection.
  • Page 55 GA-686DX Ö FLOPPY DISK CNTRLR ERROR OR NO CNTRLR PRESENT Cannot find or initialize the floppy drive controller. Make sure the controller is installed correctly and firmly. If there are no floppy drives installed, be sure the Diskette Drive selection in Setup is set to NONE.
  • Page 56 Appendix A: Post Message Ö Memory Verify Error at ... Indicates an error verifying a value already written to memory. Use the location along with your system's memory map to locate the bad chip. Ö OFFENDING ADDRESS NOT FOUND This message is used in conjunction with the I/O CHANNEL CHECK and RAM PARITY ERROR messages when the segment that has caused the problem cannot be isolated.
  • Page 57 GA-686DX The board installed is not responding to the ID request, or no board ID has been found in the indicated slot. When this error appears, the system will boot in ISA mode, which allows you to run the EISA Configuration Utility.

  • Page 58: Appendix B: Post Codes

    Appendix B: Post Codes APPENDIX B: POST CODES EISA POST codes are typically output to port address 300h. ISA POST codes are typically output to port address 80h. POST Name Description Turn Off Chipset OEM Specific-Cache control. Cache Processor Test 1 Processor Status (1 FLAGS) Verification.
  • Page 59 GA-686DX Setup low memory Early chip set initialization. Memory presence test. OEM chip set routines. Clear low 64 K of memory. Test first 64 K memory. Early Cache Cyrix CPU initialization. Initialization Cache initialization. Setup Interrupt Initialize first 120 interrupt vectors with...
  • Page 60 Appendix B: Post Codes Test Stuck NMI Verify NMI can be cleared. Bits (Parity/IO Check) Display CPU clock. 1B-1E Reserved Set EISA Mode If EISA non-volatile memory checksum is good, execute EISA initialization. If not, execute ISA tests an clear EISA mode flag. Test EISA Configuration Memory Integrity (checksum &...
  • Page 61 GA-686DX Detect & Initialize Initialize math coprocessor. Math Coprocessor Reserved Reserved 48-4D Reserved Manufacturing Reboot if Manufacturing POST Loop pin is set. POST Loop or Otherwise display any messages (i.e., any non-fatal Display Messages errors that were detected during POST) and enter Setup.

  • Page 62: Appendix C: Bios Default Drive Table

    Appendix C: BIOS Default Drive Table APPENDIX C: BIOS DEFAULT DRIVE TABLE Type Size Cylinders Heads Sectors Write / Land Example Model (MB) Precomp Zone 10 MB TEAC SD510 MMI 112, 5412 20 MB Seagate ST225, ST4026 31 MB 62 MB 47 MB 20 MB 65535...
  • Page 63 GA-686DX 69 MB 65535 Maxtor2140, Priam S14 41 MB Maxtor2190, Priam S19 68 MB 65535 Maxtor1085 Micropolis1325 53 MB Maxtor1105, 1120, 4780 94 MB 1024 65535 1024 Maxtor1170 128 MB 1024 65535 1024 CDC9415 43 MB 1024 1024 1024 10 MB...

  • Page 64: Appendix D: Problem Sheet

    Appendix D: Problem Sheet APPENDIX D: PROBLEM SHEET 1. Customer Data Tel. No. Name Fax. No. Address Purchase Date 2. Mainboard Date Rev. No. Model NO. Serial No. 3. System Configuration CPU Type: CPU Brand: CPU Speed: DRAM Type: 32 MB DRAM Speed: 60 ns DRAM Total Size:...
  • Page 65 GA-686DX R-01-01-061216...

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