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Vextrec GMB-486SG User Manual

High performance 486 vlb motherboard
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GMB-486SG
High Performance
486
VLB Motherboard
User's Manual
For
GMB-486sg v2
Manual Edition 6.03

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Summary of Contents for Vextrec GMB-486SG

  • Page 1 GMB-486SG High Performance VLB Motherboard User’s Manual GMB-486sg v2 Manual Edition 6.03...
  • Page 2 This guide contains instructions for configuring and installing the mainboard. • Chapter 1, Introduction, acquaints user with the special features of the mainboard. • Chapter 2, Hardware Configuration, gives information on configuring memory and setting the mainboard's jumpers. Brief sections on installing memory. •...

  • Page 3: Unpacking The Mainboard

    UNPACKING THE MAINBOARD The Mainboard comes packed in a sturdy cardboard shipping carton. The carton contains: • The Mainboard • This User's Guide Note: Do not remove the mainboard from its original packing until ready to install. The mainboard is easily damaged by static electricity. Observe the following precautions while unpacking and installing the mainboard.

  • Page 4: Table Of Contents

    CONTENTS CHAPTER 1 INTRODUCTION KEY FEATURES MAINBOARD COMPONENTS VESA LOCAL BUS SPECIAL FEATURES CHAPTER 2 HARDWARE CONFIGURATION JUMPER AND MEMORY BANK LOCATIONS JP8, JP10-JP15, JP21, JP22, JP24, JP25, JP30, JP31, JP34-JP36, JP38 - CPU TYPE CONFIGURATION CPU INSTALLATION CACHE CONFIGURATION 2.4.1 UPGRADING CACHE 2.4.2...
  • Page 5 4.4.2 BIOS FEATURES SETUP MENU 4.4.3 CHIPSET FEATURES SETUP MENU 4.4.4 POWER MANAGEMENT SETUP MENU 4.4.5 LOAD BIOS DEFAULTS MENU 4.4.6 LOAD SETUP DEFAULTS MENU 4.4.7 PASSWORD SETTING MENU 4.4.8 IDE HDD AUTO DETECTION MENU 4.4.9 SAVE & EXIT SETUP MENU 4.4.10 EXIT WITHOUT SAVING MENU CHAPTER 5...

  • Page 6: Chapter 1 Introduction

    Introduction CHAPTER 1 INTRODUCTION The mainboard is a 2/3 body AT size high-performance mainboard that provides with basic elements on which to build an advanced computer. The mainboard running from 25MHz to 133MHz, supports Normal 486 CPUs, Intel's SL-Enhanced 486, Cyrix Cx486S/DX/DX2, UMC U5SX-486, P24D/P24T; and optionally support P24C(486DX4), Am486DX2/DX4(3.45V), Enhanced Am486DX2/DX4 (3.45V), Cx486DX2- V66/V80, Cyrix DX4-100, Cx5x86-100, TI DX2-80, IBM486-4V3100GC/GIC and AMD-X5-133ADW CPUs.
  • Page 7 Chapter 1 • Hidden DRAM refresh support. • Support KB control Turbo/Deturbo mode select. • Support 7 Direct Memory Access channels and 16 Interrupt levels. • Three 16-bit I/O slots, one 8-bit I/O slots, and three Standard VESA Local Bus master slot. •...

  • Page 8: Mainboard Components

    Introduction MAINBOARD COMPONENTS This section gives a brief description of key components on the mainboard. Refer to Fig 1 for component locations. Fig 1 Key Components of the Mainboard...

  • Page 9: Vesa Local Bus Special Features

    Chapter 1 VESA LOCAL BUS SPECIAL FEATURES • Three-bus master are supported on the VESA Local-Bus. The VESA Local-Bus connector type is a standard 32-bit Micro Channel type connector, and is located inline with a system I/O bus connector. • Three slots are provided on the mainboard. Either with one master or three master slots. •...

  • Page 10: Chapter 2 Hardware Configuration

    Hardware Configuration CHAPTER 2 HARDWARE CONFIGURATION This chapter describes how to set the mainboard jumpers for cache memory and display type, and how to install memory modules. Before beginning the configuration, user should take the following precautions: • Turn off the power supply, and unplug the power cord before begin. •...

  • Page 11: Jp8, Jp10-Jp15, Jp21, Jp22, Jp24, Jp25, Jp30, Jp31, Jp34-Jp36, Jp38 - Cpu Type Configuration

    Chapter 2 JP8, JP10-JP15, JP21, JP22, JP24, JP25, JP30, JP31, JP34-JP36, JP38 - CPU TYPE CONFIGURATION The mainboard can support processor at different speed. Various jumpers are required to setup for installing different CPU. Refer to Fig 2 for the jumpers’ location, and set the jumper according to the following table: JP8, JP10-JP15, JP21, JP22, JP24, JP25, JP30, JP31, JP34-JP36, JP38 --CPU Type Configuration...
  • Page 12 Hardware Configuration Table 1C: CPU Type: - P24C (DX4) (OPTIONAL) Table 1D: CPU Type: - 486SX/SLE 486SX...
  • Page 13 Chapter 2 Table 1E: CPU Type: - 486DX/DX2, SLE 486DX/DX2 Table 1F: CPU Type: - Cyrix 486S...
  • Page 14 Hardware Configuration Table 1G: CPU Type: - Cyrix 486DX/DX2 Table 1H: CPU Type: - UMC U5SX-486...
  • Page 15 Chapter 2 Table 1I: CPU Type: - Enhanced Am486DX2/DX4 (3.45V) (A80486DX2-XXSV8B/A80486DX4-1XXSV8B) For DX4-100 CPU Frequency: 33MHz For DX4-120 CPU Frequency: 40MHz Table 1J: CPU Type: - Am486DX2 (3.45V) (Optional)
  • Page 16 Hardware Configuration Table 1K: CPU Type: - Am486DX4 (3.45V) (Optional) Table 1L: CPU Type: - Cx486DX2-V66 (3.6V) (Optional)
  • Page 17 Chapter 2 Table 1M: CPU Type: - Cx486DX2-V80 (4.0V) (Optional) Table 1N: CPU Type: - Cx5x86/IBM 486-4V3100GIC (3.3V)
  • Page 18 Hardware Configuration Table 1O: CPU Type: - Cx486DX4-100/TI486DX2-80/ IBM 486-4V3100GC (3.45V) (Cyrix Cx486DX4-100GP) Table 1P: CPU Type: - Am5x86 -P75 (3.45)(Optional) (AMD-X5-133ADW) For 133MHz CPU, CPU Frequency: 33MHz...

  • Page 19: Cpu Installation

    Chapter 2 Table 1Q: CPU Type: - P24D (DX4) CPU INSTALLATION The mainboard has a socket that can support 486 CPU. See Fig 1 in Chapter 1 for the socket's location. Install the 486 CPU as follows: Caution: Static electricity can damage the processor. Plug the 486 CPU into the socket, with the notch corner aligned.

  • Page 20: Cache Configuration

    Hardware Configuration CACHE CONFIGURATION The special feature of the mainboard is a built-in direct-mapped cache controller with optional write- back or write-through operation that supports 128KB, 256KB or 512KB cache memory. The mainboard has a built-in cache controller. It requires external SRAM as tag and cache memory. The caching Scheme is direct mapping with selectable write-back or write-through operation.

  • Page 21: Cache Chip Sockets And Jumper Locations16

    Chapter 2 2.4.3 CACHE CHIP SOCKETS AND JUMPER LOCATIONS The diagram below describes the location of the cache chip sockets and cache jumpers. Fig 4 Cache Jumper and Socket Locatio...

  • Page 22: Jp1-Jp4, Jp33 - Cache & Tag Ram Jumper Setting

    Hardware Configuration 2.4.4 JP1-JP4, JP33 - CACHE & TAG RAM JUMPER SETTING Cache memory is configured using jumpers, JP1, JP3, & JP33; while Tag RAM setting is configured using jumpers JP2, JP4. The following tables summarize the possible configuration. JP1, JP3, JP33 -- Cache Jumper Setting Table 3A: Cache Jumper Setting JP2, JP4 -- Tag RAM Jumper Setting Table 3B: Tag RAM Jumper Sett...

  • Page 23: Installing Cache Chips

    Chapter 2 2.4.5 INSTALLING CACHE CHIPS Install cache chips on the mainboard as follows: Caution: Static electricity can damage a cache chip. Review the section on static electricity precautions at the beginning of this manual, and make sure that power to the mainboard is off. Align the chip so that the notched corner of the chip matches the notched corner of the socket.

  • Page 24: Jp28, Jp29 - Vl-Bus Identify Pins

    Hardware Configuration JP28, JP29 - VL-BUS IDENTIFY PINS Set the jumpers, JP28 & JP29 to configure the VL-Bus Clock Speed. Refer to Fig 2 for their location. Set the jumper as below. JP28, JP29 -- VL-Bus Clock Speed Table 4 JP16 - CMOS RAM BATTERY SETTING Please set JP16 is for CMOS RAM battery as below.

  • Page 25: Jp20 - Cpu Clock Delay

    Chapter 2 JP20 - CPU CLOCK DELAY JP20 is for the CPU Clock Delay setting. Refer to Fig 2 for JP20 location. JP20 -- CPU Clock Delay Table 7 JP5, JP6, JP7 - CPU FREQUENCY CONFIGURATION JP5, JP6, & JP7 are for the CPU Frequency Configuration. Two different settings are provided for different Clock Generator that is used at U16 or U17.

  • Page 26: Jp37 - Flash Rom Jumper

    Hardware Configuration 2.10 JP37 - FLASH ROM JUMPER JP37 is for Flash ROM selection. Refer to Fig 2 for its location. JP37 -- Flash ROM Jumpers Table 9...

  • Page 27: Memory Installation

    Chapter 2 2.11 MEMORY INSTALLATION Four 72pin SIMM sockets are provided in 4 Banks. User can install 256Kx36, 512Kx36, 1Mx36, 2Mx36, 4Mx36, 8Mx36, or 16Mx36 SIMMs. Note that all SIMM modules in a bank must be same capacity and follow combination showed below. For best performance 70ns SIMMs are required. BANK 0 BANK 1 BANK 2...
  • Page 28 Hardware Configuration BANK 0 BANK 1 BANK 2 BANK 3 MEMORY SIZE NONE NONE 12MB 16MB NONE NONE 16MB 16MB NONE NONE NONE 16MB NONE 16MB 16MB NONE NONE 17MB 16MB NONE 18MB 16MB NONE NONE 18MB 16MB NONE 20MB 16MB NONE NONE...
  • Page 29 Chapter 2 BANK 0 BANK 1 BANK 2 BANK 3 MEMORY SIZE 16MB 16MB 36MB 16MB 16MB NONE 36MB 32MB NONE NONE 36MB 16MB 16MB 40MB 32MB NONE 40MB 16MB 40MB 16MB 16MB 16MB NONE 48MB 16MB 32MB NONE NONE 48MB 16MB 16MB...

  • Page 30: Installing Simm

    Hardware Configuration 2.11.1 INSTALLING SIMM Install a SIMM in a memory socket as follows: Caution: Static electricity can seriously damage SIMM modules. Review the section on static electricity precautions at the beginning of this manual. Align the SIMM module so that the pin-1 marking on the module corresponds to the socket pin-1 marking.

  • Page 31: Chapter 3 Mainboard Installation

    Chapter 3 CHAPTER 3 MAINBOARD INSTALLATION Once the mainboard's hardware has been configured, the user is now ready to install the mainboard into the system chassis. This chapter describes what are needed to assemble an advanced computer system based on the mainboard.

  • Page 32: Installing The Mainboard

    Mainboard Installation INSTALLING THE MAINBOARD Before starting, check the location of the mounting holes in the case and on the mainboard. Caution: Static electricity can damage the mainboard. Install the mainboard as follows: Review the section on static electricity precautions at the beginning of this manual. Place the case on an anti-static mat and remove the cover.

  • Page 33: Connectionlocations

    Chapter 3 3.3.1 CONNECTIONLOCATIONS Fig 7 Connector Locations...

  • Page 34: Connectors

    Mainboard Installation CONNECTORS 3.4.1 CN1 - KEYBOARD CONNECTOR A standard five-pin female DIM keyboard connector is located at the rear of the keyboard. Plug the jack on the keyboard cable into this connector. Description Keyboard Clock Keyboard Data Spare Ground +5V DC Table 11 3.4.2 CN2 - POWER SUPPLY CONNECTOR...

  • Page 35: J2 - Green Power Supply Connector

    Chapter 3 3.4.4 J2 - GREEN POWER SUPPLY CONNECTOR Attach the green power supply control connector to J2. Description Pull Low on Power Down Table 14 3.4.5 J3 - TURBO SWITCH CONNECTOR J3 connects to the Turbo switch, which is used to select the mainboard's clock speed. Table 15 3.4.6 J4 - TURBO LED CONNECTOR J4 is usually connected to a Turbo LED on front of the system case.

  • Page 36: J6 - Reset Switch Connector

    Mainboard Installation 3.4.8 J6 - RESET SWITCH CONNECTOR Attach the Reset switch cable to this connector. The Reset switch restarts the system. Setting Description Close Reset Open Normal Table 18 3.4.9 J7 - KEYLOCK & POWER LED CONNECTOR J7 is a keylock connector that enables and disables the keyboard and the Power-LED on the case. Description LED Power Not Used...

  • Page 37: System Assembly Overview

    Chapter 3 SYSTEM ASSEMBLY OVERVIEW After installing and connecting the mainboard, assemble components in the following order: Power Supply: Place the power supply so that it fits the raised tongues on the chassis floor. Insert and fasten the two screws on the back panel of the chassis. Connect the power supply to the power supply connector.

  • Page 38: Chapter 4 Award Bios Setup

    Award BIOS Setup CHAPTER 4 AWARD BIOS SETUP 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 RAM so that it retains the Setup information when the power is turned off.

  • Page 39: Control Keys

    Chapter 4 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 40: The Main Menu

    Award BIOS Setup THE MAIN MENU Once you enter Award BIOS CMOS Setup Utility, the Main Menu will appear on the screen. The Main Menu allows you to select from ten setup functions and two exit choices. Use arrow keys to select among the items and press <Enter>...

  • Page 41: Standard Cmos Setup Menu

    Chapter 4 4.4.1 STANDARD CMOS SETUP MENU The items on Standard CMOS Setup Menu are divided into 10 categories. Each category includes no, one or more than one setup items. Use the arrow keys to highlight the item and then use the <PgUp> or <PgDn>...

  • Page 42: Bios Features Setup Menu

    Award BIOS Setup 4.4.2 BIOS FEATURES SETUP MENU ROM ISA BIOS (2C4I9G30) BIOS FEATURES SETUP AWARD SOFTWARE, INC. Virus Warning : Enabled Video BIOS Shadow : Enabled CPU Internal Cache : Enabled C8000-CFFFF Shadow: Disabled External Cache : Enabled D0000-D7FFF Shadow: Disabled Quick Power On Self Test : Enabled D8000-DFFFF Shadow: Disabled Boot Sequence...

  • Page 43: Chipset Features Setup Menu

    Chapter 4 4.4.3 CHIPSET FEATURES SETUP MENU ROM ISA BIOS (2C4I9G30) CHIPSET FEATURES SETUP AWARD SOFTWARE, INC. Auto Configuration : Enabled Latch Local Bus : T3 Local Bus Ready : Synchronize AT Bus Clock : 1/5CLK Hidden Refresh : Enable L2 Cache Scheme : Write Back L1 Cache Scheme...

  • Page 44: Power Management Setup Menu

    Award BIOS Setup 4.4.4 POWER MANAGEMENT SETUP MENU ROM ISA BIOS (2C4I9G30) POWER MANAGEMENT SETUP AWARD SOFTWARE, INC. Power Management : Max Saving IRQ 4 (COM 1) : Enable PM Control by APM : Yes IRQ 5 (LPT or LAN) : Enable VGA Adapter Type: Non-Green IRQ 6 (Floppy Disk)
  • Page 45 Chapter 4 ROM ISA BIOS (2C4I9G30) POWER MANAGEMENT SETUP AWARD SOFTWARE, INC. Power Management : Max Saving IRQ 4 (COM 1) : Enable PM Control by APM : Yes IRQ 5 (LPT or LAN) : Enable VGA Adapter Type: Non-Green IRQ 6 (Floppy Disk) : Enable Video Off Option...

  • Page 46: Load Bios Defaults Menu

    Award BIOS Setup 4.4.5 LOAD BIOS DEFAULTS MENU When you select this function, the following message will appear at the centre of the screen to assist you to load BIOS defaults (except Standard CMOS Setup). Load BIOS Defaults (Y/N)? 4.4.6 LOAD SETUP DEFAULTS MENU When you select this function, the following message will appear at the centre of the screen to assist you to load Setup defaults (except Standard CMOS Setup).

  • Page 47: Ide Hdd Auto Detection Menu

    Chapter 4 4.4.8 IDE HDD AUTO DETECTION MENU This function will automatically detect the information of the Hard Disk, and list them for your reference. ROM ISA BIOS (2C4I9G30) CMOS SETUP UTILITY AWARD SOFTWARE, INC. CYLS. HEADS PRECOMP LANDZONE SECTORS Drive C : ( Select Drive C Option (N=Skip) : N OPTIONS SIZE CYLS.

  • Page 48: Chapter 5 Bios Post Message

    BIOS POST Message CHAPTER 5 BIOS 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 49 Chapter 5 *** NOTE: When either of these errors appear, the system will boot in ISA mode, which allows you to run the EISA Configuration Utility. ERROR ENCOUNTERED INITIALIZING HARD DRIVE: Hard drive cannot be initialized. Be sure the adapter is installed correctly and all cables are correctly and firmly attached.
  • Page 50 BIOS POST Message RAM PARITY ERROR messages when the segment that has caused the problem has been isolated. PRESS A KEY TO REBOOT: This will be displayed at the bottom screen when an error occurs that required you to reboot. Press any key and the system will reboot.

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