1. Manuals
  2. Brands
  3. Gigabyte Manuals
  4. Motherboard
  5. GA-486AM
  6. User manual

Gigabyte GA-486AM User Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

GA - 486AM
USER'S MANUAL
PCI-Bus 486DX / DX2 / SX / S-Series / OverDrive / P24D / P24T / DX4 Mainboard
Rev. 1 First Edition

Advertisement

Table of Contents
loading

Related Manuals for Gigabyte GA-486AM

Summary of Contents for Gigabyte GA-486AM

  • Page 1 GA - 486AM USER'S MANUAL PCI-Bus 486DX / DX2 / SX / S-Series / OverDrive / P24D / P24T / DX4 Mainboard Rev. 1 First Edition...
  • Page 2 GA-486AM ______________________________________________________________________ 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.

  • Page 3: Table Of Contents

    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 ..................1-1 1.4. BLOCK DIAGRAM ..................... 1-3 1.5. INTRODUCE THE PCI-BUS ................1-3 2.SPECIFICATION ......................1-1 2.1. HARDWARE...................... 2-1 2.2.
  • Page 4 GA-486AM ______________________________________________________________________ 5.2. I/O & MEMORY MAP ..................5-3 5.3. TIMER & DMA CHANNELS MAP..............5-3 5.4. INTERRUPT MAP ..................... 5-4 5.5. RTC & CMOS RAM MAP .................. 5-4 APPENDIX A: POST MESSAGE..................A-1 APPENDIX B: POST CODES..................B-1 APPENDIX C: BIOS DEFAULT DRIVE TABLE ............. C-1 APPENDIX D: PROBLEM SHEET .................

  • Page 5: Introduction

    1INTRODUCTION 1.1 PREFACE Welcome to use the GA-486AM motherboard. The motherboard is a 128 KB - 1 MB CACHE 486DX series PC/AT compatible system with ISA bus, PCI (Peripheral Component Interconnect) bus and has been designed to be the fastest 486 PC/AT system and the GREEN FUNCTION (Power-Down Mode) had been added.
  • Page 6 GA-486AM ______________________________________________________________________ System Benchmarks At DOS Environment with IDE Controller • CPU • Config.sys: • Autoexec.bat: : 486DX4-100/75,DX2-80/66/50,DX-40/33/P24T 63 • DRAM : 32 MB / 70ns DEVICE = C:\DOS\SETVER.EXE C:\DOS\SMARTDRV.EXE /X • CACHE : 256KB DEVICE = Using Default Setting @ECHO OFF •...

  • Page 7: Block Diagram

    Introduction ______________________________________________________________________ 1.4 BLOCK DIAGRAM SD<0..15> SA<0..15> UM8881F 80486 AT Bus 8 MHz PCI Bus Clock Buffer Clock Buffer BIOS ROM Cache SRAM UM8886AF CTRL Buffer MA,RAS,CAS DATA Buffer Memory DRAM 1.5 INTRODUCE THE PCI-BUS Connecting devices to a local bus of CPU can dramatically increase the speed of I/O-bound peripherals with only a slight increase in cost over traditional systems.

  • Page 9: Specification

    GA-486AM ______________________________________________________________________ SPECIFICATION 2.1 HARDWARE • − 80486SX/DX/DX2/S-Series, 80487SX, OverDrive, P24D, P24T, DX4. − 237 pins (Socket 3) ZIF white socket / LIF socket on board. • − COPROCESSOR Coprocessor included in 80486DX. • − SPEED 25 / 33 / 40 / 50 MHz system −...

  • Page 10: Software

    Specification ______________________________________________________________________ 2.2 SOFTWARE • − BIOS Licensed AWARD BIOS. − AT CMOS Setup, Advanced / Chipset Setup and Power Management included. • − O. S. Operation with MS-DOS, WINDOWS NT,OS/2, NOVELL, SCO UNIX. 2.3 ENVIRONMENT • − AMBIENT TEMP. 0°C to +50°C (operating).

  • Page 11: Hardware Installation

    GA-486AM ______________________________________________________________________ HARDWARE INSTALLATION 3.1 UNPACKING ainboard ackage hould ontain ollowing: • A-486AM ainboard • User's manual • A Driver Diskette 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 12 Hardware Installation ______________________________________________________________________ JP15 JP15 JP15 INTEL SX-25/SX2-50 INTEL SX-25/SX2-50 S-CPU INTEL DX-25/DX2-50 INTEL DX-25/DX2-50 S-CPU INTEL P24T 63 WT INTEL P24T 63 WB INTEL DX4-75(25x3) S-CPU INTEL SX-33/SX2-66 INTEL SX-33/SX2-66 S-CPU INTEL DX-33/DX2-66 INTEL DX-33/DX2-66 S-CPU INTEL P24T 83 WT INTEL P24T 83 WB INTEL DX-33 OVERDRIVE INTEL DX-33 OVERDRIVE S-CPU...
  • Page 13 GA-486AM ______________________________________________________________________ JP11 JP11 JP12 JP12 JP10 JP23 JP23 JP22 JP13 JP20 INTEL SX-25/SX2-50 INTEL SX-25/SX2-50 S-CPU INTEL DX-25/DX2-50 INTEL DX-25/DX2-50 S-CPU INTEL P24T 63 WT INTEL P24T 63 WB INTEL DX4-75(25x3) S-CPU INTEL SX-33/SX2-66 INTEL SX-33/SX2-66 S-CPU INTEL DX-33/DX2-66...

  • Page 14: Jumpers And Connectors Setting

    Hardware Installation ______________________________________________________________________ 3.3 JUMPERS AND CONNECTORS SETTING • CONNECTOR SETTING J1: Reset Connector Open Normal operation. Close Hardware reset system. J2: Turbo Switch Connector Close Low speed. Open High speed. (Default) J3: Speaker Connector Data. GND. GND. VCC (+5V). J4: Power LED &...

  • Page 15: Sram Installation And Jumpers Setup

    GA-486AM ______________________________________________________________________ into Green mode right away. JP4: Green LED (On board layout, "+" is LED anode) When system gets into Green, the LED on this jumper will be light. JP25: Green Power Connector (On board layout, "+" is positive voltage) If your power supply has signal to control the A.C.
  • Page 16 Hardware Installation ______________________________________________________________________ Clock JP15 25 MHz Short Open Open 33 MHz Short Short Short 40 MHz Short Short Open 50 MHz Open Open Short • CPU BRAND SELECTION BRAND Intel, AMD 3-4, 5-6 Installed Installed Cyrix 1-2, 3-4 Installed Installed 5-6, 7-8 Installed...

  • Page 17: Dram Installation

    GA-486AM ______________________________________________________________________ 3.6 DRAM INSTALLATION This mainboard can be installed with 1, 2, 4, 8, 16 or 32 MB 72 pins SIMM module DRAM. The DRAM speed of both mainboard is using 60/70 ns. The banks of memory system on the mianboard includes from SIMM 1 to SIMM 4.

  • Page 18: Hardware Reset Switch Connector Installation

    Hardware Installation ______________________________________________________________________ 3.11HARDWARE RESET SWITCH CONNECTOR INSTALLATION The Reset switch on panel provides users with Hardware Reset function which is almost the same as power on / off. The system will do a cold start after the Reset switch is pushed and released at once.

  • Page 19: Bios Configuration

    GA-486AM ______________________________________________________________________ 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 20: Getting Help

    BIOS Configuration ______________________________________________________________________ 4.3 GETTING HELP 4.3.1Main Menu The on-line description of the highlighted setup function is displayed at the bottom of the screen. 4.3.2Status 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 highlight item.
  • Page 21 GA-486AM ______________________________________________________________________ • 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 22: Standard Cmos Setup Menu

    BIOS Configuration ______________________________________________________________________ 4.5 STANDARD CMOS SETUP MENU The items in Standard CMOS Setup Menu (Figure 2) are divided into 11 categories. Each category includes none, one or more than one setup items. Use the arrows to highlight the item and then use the <PgUp> or <PgDn> keys to select the value you want in each item. ¡...
  • Page 23 GA-486AM ______________________________________________________________________ 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. ______________________________________________________________________...
  • Page 24 BIOS Configuration ______________________________________________________________________ Primary Master / Slave, Secondary Master / Salve • The category identify the types of hard disk drive C or drive F 4 devices that has been installed in the computer. There are 46 pre- defined types and a user definable type. Type 1 to Type 46 are pre-defined.
  • Page 25 GA-486AM ______________________________________________________________________ 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 26 BIOS Configuration ______________________________________________________________________ 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 resolution monochrome adapters ______________________________________________________________________...
  • Page 27 GA-486AM ______________________________________________________________________ Halt on • The category determines whether the computer will stop if an error is detected during power up. All errors Whenever the BIOS detects a non- fatal error the system will be stopped and you will be prompted...
  • Page 28 BIOS Configuration ______________________________________________________________________ systems with 640 K or more memory installed on the motherboard. Extended Memory The BIOS determines how much extended memory is presented during the POST. This is the amount of memory located above 1 MB in the CPU's memory address map.

  • Page 29: Bios Features Setup

    GA-486AM ______________________________________________________________________ 4.6 BIOS FEATURES SETUP ROM PCI/ISA BIOS ( 2A4X5G03 ) BIOS FEATURES SETUP AWARD SOFTWARE, INC. Security Option : Setup Video BIOS Shadow : Enabled Virus Warning : Disabled C8000 - CBFFF Shadow : Disabled CPU Internal Cache...
  • Page 30 BIOS Configuration ______________________________________________________________________ • 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 31: Chipset Features Setup

    GA-486AM ______________________________________________________________________ • IDE Second Channel Control The default value is Enabled. Enabled Enable IDE Second Channel. Disabled Disable IDE Second Channel. • Video BIOS Shadow It determines whether video BIOS will be copied to RAM, however, it is optional from chipset design.
  • Page 32 BIOS Configuration ______________________________________________________________________ • Auto Configuration The default value is Enabled. Enabled To Enable auto configuration function. Disabled To Disable auto configuration function. • AT Bus Clock The default value is PCICLK/4. PCICLK/2 For 40 MHz system. PCICLK/3 For 25 MHz system. PCICLK/4 For 33 MHz system.
  • Page 33 GA-486AM ______________________________________________________________________ • Memory Hole Size The default value is None. None System doesn't assign any memory below 16 MB to AT Bus. System assign 64 KB memory size below 16 MB to AT Bus. 128K System assign 128 KB memory size below 16 MB to AT Bus.
  • Page 34 BIOS Configuration ______________________________________________________________________ • CPU Clock / PCI Clock The default value is 1 : 1. For 25 MHz or 33 MHz system. For 40 MHz or 50 MHz system. • Onboard FDD Controller The default value is Enabled. Enabled Enable Onboard FDD Controller.

  • Page 35: Power Management Setup

    GA-486AM ______________________________________________________________________ 4.8 POWER MANAGEMENT SETUP ROM PCI/ISA BIOS ( 2A4X5G03 ) POWER MANAGEMENT SETUP AWARD SOFTWARE, INC. Green Function : Enable *Monitor Event In Full On Mode Green Timer : 2 Min Monitor PCI1 Master Card : Enabled VGA Adaptor Type...
  • Page 36 BIOS Configuration ______________________________________________________________________ • HDD Power Down The default value is Disabled. Disabled Disable HDD Power Down mode function. Enable HDD enter Power Down mode between 1 to 15 mins. Mins • Network Card Installed The default value is NO. Network Card Installed.

  • Page 37: Pci /Green Function Setup

    GA-486AM ______________________________________________________________________ 4.9 PCI /GREEN FUNCTION SETUP ROM PCI/ISA BIOS ( 2A4X5G03 ) PCI / GREEN FUNCTION SETUP AWARD SOFTWARE, INC. Slot 1 Using INT# : AUTO *WakeUp Event In Inactive Mode: Slot 2 Using INT# : AUTO Monitor IRQ3...
  • Page 38 BIOS Configuration ______________________________________________________________________ • PCI IRQ Actived By The default value is Edge. Edge Normal Operation. Level For some PCI SCSI or Lan device using same PCI INT. • Onboard PCI / IDE The default value is Enable. Enabled Enable onboard PCI IDE Function. Disabled Disable onboard PCI IDE Function.

  • Page 39: Load Bios Defaults

    GA-486AM ______________________________________________________________________ 4.10LOAD BIOS DEFAULTS ROM PCI/ISA BIOS ( 2A4X5G03 ) CMOS SETUP UTILITY AWARD SOFTWARE, INC. STANDARD CMOS SETUP LOAD SETUP DEFAULTS BIOS FEATURES SETUP PASSWORD SETTING CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION POWER MANAGEMEN SAVE & EXIT SETUP...

  • Page 40: Load Setup Defaults

    BIOS Configuration ______________________________________________________________________ 4.11LOAD SETUP DEFAULTS ROM PCI/ISA BIOS ( 2A4X5G03 ) CMOS SETUP UTILITY AWARD SOFTWARE, INC. STANDARD CMOS SETUP LOAD SETUP DEFAULTS BIOS FEATURES SETUP PASSWORD SETTING CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION POWER MANAGEMEN SAVE & EXIT SETUP Load SETUP Defaults (Y/N)? N PCI / GREEN FUNCTIO EXIT WITHOUT SAVING...

  • Page 41: Password Setting

    GA-486AM ______________________________________________________________________ 4.12PASSWORD SETTING PASSWORD SETTING When you select this function, the following message will appear at the center of the screen to assist you in creating a password. ROM PCI/ISA BIOS ( 2A4X5G03 ) CMOS SETUP UTILITY AWARD SOFTWARE, INC.

  • Page 42: Ide Hdd Auto Detection

    BIOS Configuration ______________________________________________________________________ 4.13IDE HDD AUTO DETECTION ROM PCI/ ISA BIOS ( 2A4X5G03 ) STANDARD CMOS SETUP AWARD SOFTWARE, INC. HARD DISKS TYPE SIZE CYLS HEADS PRECOMP LANDZ SECTOR MODE Primary Master: Select Primary Master Option ( N:Skip ): N OPTIONS SIZE CYLS.

  • Page 43: Save & Exit Setup

    GA-486AM ______________________________________________________________________ 4.14SAVE & EXIT SETUP ROM PCI/ISA BIOS ( 2A4X5G03 ) CMOS SETUP UTILITY AWARD SOFTWARE, INC. STANDARD CMOS SETUP LOAD SETUP DEFAULTS BIOS FEATURES SETUP PASSWORD SETTING CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION POWER MANAGEMEN SAVE & EXIT SETUP...

  • Page 44: Exit Without Saving

    BIOS Configuration ______________________________________________________________________ 4.15EXIT WITHOUT SAVING ROM PCI/ISA BIOS ( 2A4X5G03 ) CMOS SETUP UTILITY AWARD SOFTWARE, INC. STANDARD CMOS SETUP LOAD SETUP DEFAULTS BIOS FEATURES SETUP PASSWORD SETTING CHIPSET FEATURES SETUP IDE HDD AUTO DETECTION POWER MANAGEMEN SAVE & EXIT SETUP Quit Without Saving (Y/N) N PCI / GREEN FUNCTIO EXIT WITHOUT SAVING...

  • Page 45: At Technical Information

    GA-486AM ______________________________________________________________________ AT TECHNICAL INFORMATION 5.1 BUS CONNECTOR PIN OUT 5.1.1ISA BUS SLOT PIN OUT -I/O CH CHK RESET SD07 SD06 IRQ9 SD05 SD04 DRQ2 SD03 -12V SD02 SD01 +12V SD00 -I/O CH RDY -SMEMW -SMEMR SA19 -IOW SA18 -IOR...

  • Page 46: Pci Bus Slot Pin Out

    AT Technical Information ______________________________________________________________________ 5.1.2PCI BUS SLOT PIN OUT -12V +12V INTA# INTB# INTC# INTD# PST#1 PST#2 RST# GNT# REQ# AD_31 AD_30 AD_29 AD_28 AD_27 AD_26 AD_25 AD_24 CBE#3 IDSEL AD_23 AD_22 AD_21 AD_20 AD_19 AD_18 AD_17 AD_16 CEB#2 FRAME# IRDY# TRDY# DEVSEL#...

  • Page 47: I/O & Memory Map

    GA-486AM ______________________________________________________________________ 5.2 I/O & MEMORY MAP MEMORY MAP: [0000000- System memory used by DOS and application 009FFFF] program. [00A0000- Display buffer memory for 00BFFFF] VGA/EGA/CGA/MONOCHROME adapter. [00C0000- Reserved for I/O device BIOS ROM or RAM buffer. 00DFFFF] [00E0000- Reserved for PCI device ROM.
  • Page 48 AT Technical Information ______________________________________________________________________ DMA Channel-7 Available ______________________________________________________________________...

  • Page 49: Interrupt Map

    GA-486AM ______________________________________________________________________ 5.4 INTERRUPT MAP NMI: Parity check error IRQ (H/W): System TIMER interrupt from TIMER-0 KEYBOARD output buffer full Cascade for IRQ 8-15 SERIAL port 2 SERIAL port 1 PARALLEL port 2 FLOPPY DISK adapter PARALLEL port 1 RTC clock...
  • Page 50 AT Technical Information ______________________________________________________________________ 40-7f Reserved for CHIPSET SETTING DATA ______________________________________________________________________...

  • Page 51: Appendix A: Post Message

    GA-486AM ______________________________________________________________________ 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 52 Appendix A: Post Message ______________________________________________________________________ Ö ERROR INITIALIZING HARD DISK CONTROLLER Cannot initialize controller. Make sure the cord is correctly and firmly installed in the bus. Be sure the correct hard drive type is selected in Setup. Also check to see if any jumper needs to be set correctly in the hard drive.

  • Page 53: Appendix B: Post Codes

    GA-486AM ______________________________________________________________________ APPENDIX B: POST CODES ISA POST codes are typically output to port address 80h. POST Name Description Turn Off Chipset Cache OEM Specific-Cache control. Processor Test 1 Processor Status (1 FLAGS) Verification. Test the following processor status flags...
  • Page 54 Appendix B:Post Codes ______________________________________________________________________ Test DMA Controller 0 BIOS checksum test. Keyboard detect and initialization. Test DMA Controller 1 Test DMA Page Test DMA Page Registers. registers 12-13 Reserved Test Timer Counter 2 Test 8254 Timer 0 Counter 2. Test 8259-1 Mask Bits Verify 8259 Channel 1 masked interrupts by alternative turning off and on the interrupt lines.
  • Page 55 GA-486AM ______________________________________________________________________ Pre-boot Enable Enable parity checker. Enable NMI, Enable cache before boot. Initialize Option ROMs Initialize any option ROMs present from C8000h to EFFFFh. When FSCAN option is enabled, will initialize from C8000h to F7FFFh. Initialize Time Value Initialize time value in 40h: BIOS area.

  • Page 57: Appendix C: Bios Default Drive Table

    Appendix C: Default Drive Table ______________________________________________________________________ APPENDIX C: BIOS DEFAULT DRIVE TABLE Type Size (MB) Cylinders Heads Write/ Precomp Land Zone Sectors 65535 65535 65535 65535 65535 65535 65535 65535 1024 1023 65535 1024 65535 1023 1224 65535 1223 1224 65535 1223 1224...

  • Page 59: Appendix D: Problem Sheet

    GA-486AM ______________________________________________________________________ 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: q 16 q 32 MB...

Table of Contents