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DFI G486-EVB User Manual

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G486-EVB
Rev . C
System Board
User' s Manual
- D24350415 -

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Summary of Contents for DFI G486-EVB

  • Page 1 G486-EVB Rev . C System Board User’ s Manual - D24350415 -...
  • Page 2 Further, DFI, Inc. assumes no responsibility for any errors that may appear in this document. DFI is a registered trademark, and G486-EVB is a trademark of Diamond Flower, Inc. All other product names mentioned are trademarks or registered trade-...
  • Page 3 v FCC Statement on Class B This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interfer- ence when the equipment is operated in a residential installation.

  • Page 4: Table Of Contents

    v Table of Contents v Introduction ................. Features and Specifications ..........Installation Overview ..............Preparing the Area ..............Handling the System Board ..........Tips in Handling the System Board ....... Hardware Installation ............. Memory Installation ............Installing the Modules ..........Board Configuration ...............
  • Page 5 Troubleshooting ................Appendix A: Types of Modules ..........Appendix B: System Error Report ..........Appendix C: Memory and I/O Maps .......... Appendix D: 16-Bit ISA I/O Pin Assignments ......Appendix E: VL-Bus I/O Pin Assignments ....... Appendix F: Connector Pin Assignments ....... Appendix G: Award BIOS Hard Disk Table ......

  • Page 6: Introduction

    SL Enhanced CPUs. It will also support the AMD and Cyrix CPUs. The G486-EVB uses 256KB x 36, 1MB x 36 and 4MB x 36 HSIM modules. The memory can be configured to six different sizes from 1MB to 64MB. In addition, the G486-EVB is equipped with three 32-bit VL-Bus, and six 16-bit and one 8-bit ISA expansion slots.
  • Page 7 G486-EVB Chipset • EFAR - EC802GL: system and cache controller EC100G: data buffer Architecture • VLB/ISA Energy Efficient Design • Supports 3.3V/3.45V/3.6V/4V/5V CPUs (jumper selectable) • Ready for Intel SL Enhanced CPUs • Supports system power management • Supports CPU stopped clock •...

  • Page 8: Package Checklist

    • 22cm (8.58") x 25cm (9.75") Baby AT form factor Package Checklist The G486-EVB package contains the following items: • The G486-EVB system board • One G486-EVB user’ s manual If either of these items is missing or damaged, please contact your dealer or sales representative for assistance.

  • Page 9: Installation Overview

    G486-EVB v Installation Overview This chapter summarizes the steps in installing the G486-EVB system board into your system unit. It also includes a description of the area in which you must work and directions for memory installation. Before installing the system board, obtain the memory you plan to install.

  • Page 10: Handling The System Board

    Green 486 VL-Bus System Board Handling the System Board It is quite easy to inadvertently damage your system board even before installing it in your system unit. Static electrical discharge can damage computer compo- nents without causing any signs of physical damage. You must take extra care in handling the system board to ensure that no static build-up is present.

  • Page 11: Hardware Installation

    G486-EVB Hardware Installation Memory Installation The G486-EVB system board can support 1MB to 64MB of memory using HSIMM. HSIMM is an acro- nym for High Density Single In-line Memory Module. A HSIMM consists of RAM chips soldered onto a small circuit board.
  • Page 12 Green 486 VL-Bus System Board When installing the HSIM modules, populate Bank 0 first followed by Bank 1 and so on. Failure to do so will cause the system board to work improperly. The following table summarizes the bank locations and modules needed for the corresponding memory sizes.

  • Page 13: Installing The Modules

    Bank 1 Bank 0 EC802G EC100G Locations of the HSIMM Sockets on the G486-EVB System Board Installing the Modules HSIMMs simply snap into a socket on the system board. Pin 1 of the HSIMM must correspond with Pin 1 of the socket.

  • Page 14: Board Configuration

    Tilt the module upright until it locks in place in the socket. Board Configuration The G486-EVB is designed with jumpers to configure the board. Make sure that the jumpers are set correctly before installing the system board into your system unit.

  • Page 15: Jumper Settings

    Jumper Settings for Flash EPROM and Internal Battery EC802G EC100G Locations of Jumpers JP1 and JP8 on the G486-EVB System Board Jumper JP1 EPROM Type Jumper JP1 should be set to match the type of EPROM installed on the G486-EVB system board. Installation Overview u 2-7...
  • Page 16 On: Flash EPROM 28F010 Off: EPROM 27512 (Default) Jumper JP8 Internal Battery Select The G486-EVB comes with an internal battery. If you wish to install an external battery, set JP8 pins 1 and 2 to On. 1-2 On: 2-3 On:...

  • Page 17: Jumper Settings For Vl-Bus Add-On Boards

    G486-EVB Jumper Settings for VL-Bus Add-in Boards EC802G EC100G JP41,JP42 Locations of Jumpers JP41 and JP42 on the G486-EVB System Board Installation Overview u 2-9...
  • Page 18 Jumper JP42 CPU Speed for VL-Bus Board If a VL-Bus board is installed in the G486-EVB system board, Jumper JP42 must be set to On if the CPU speed is greater than 33MHz. Set JP42 to Off if the CPU speed is less than or equal to 33MHz.

  • Page 19: Jumper Settings For Light And Deep Green

    If you have a standard Intel 486DX, SX, OverDrive Processor or AMD 486DXL, the G486-EVB will run in Light Green mode. If you have an energy saving SL Enhanced Intel 486DX, 486DX4 or Cyrix Cx486S/Cx486S2 CPU, then the G486-EVB will run in Deep Green mode.

  • Page 20: Cache Configuration

    Processor, AMD 486DXL (Default) Cache Configuration The G486-EVB system board can be configured to three different cache sizes: 128KB, 256KB and 512KB. 128KB of cache memory is the default size. Either 32K x 8 (20ns) or 128K x 8 (20ns) SRAM chips are used for cache depending on the size of cache desired.
  • Page 21 G486-EVB Note: When the G486-EVB is equipped with 128KB cache, cacheable memory is limited to 32MB. Any memory over 32MB will be non-cacheable. EC802G EC100G Locations of the SRAMs on the G486-EVB System Board Installation Overview u 2-13...

  • Page 22: Jumper Settings For Cache Memory

    Jumper Settings for Cache Memory JP25 JP19 JP26 JP22 JP27 JP21 JP20 EC802G EC100G Locations of Jumpers JP19-JP21 and JP25-JP27 on the G486-EVB System Board Cache Memory Size Jumpers 128KB* 256KB 512KB JP19 2-3 On JP20 2-3 On 1-2 On...

  • Page 23: Cpu Installation And Upgrade

    1-2: On JP25, JP26 or JP27 CPU Installation and Upgrade The G486-EVB is equipped with a 237-pin Zero Insertion Force (ZIF) socket at location U29 of the system board, to make upgrading flexible and easy. Make sure the jumpers are set correctly before applying power, or you may damage the CPU or system board.

  • Page 24: Jumper Settings For Cpus

    JP34 Socket JP36 Locations of Jumpers JP15-JP18, JP22-JP24, JP28-JP30, JP32-JP34, JP36, JP44-47, S1, S2 and S3 on the G486-EVB System Board Caution: You will need to change the CPU-type jumper settings. (Please refer to the following pages of the manual.)

  • Page 25: Write-Back Cpus Special Notice

    G486-EVB Write-Back CPUs Special Notice The following CPUs support Internal Cache Write-Back Mode: Intel Write-Back CPU, Intel Pentium OverDrive and Cyrix CPU. If your CPU is not a Write-Back CPU, you may skip over this part of the manual. Before proceeding with the following installation, make sure your CPU is a Write-Back CPU.
  • Page 26 Green 486 VL-Bus System Board Warning: Most of these Write-Back CPUs can be set as Internal Cache Write-Back Mode or Internal Cache Write- Through Mode. If you adjust the CPU jumper settings to Write-Through Mode (WT), you must change the "CPU Inter.
  • Page 27 G486-EVB Jumpers JP15-JP18, JP22-JP24, JP28-JP30, JP32-JP34, JP36 and JP44-47 CPU Type Select Intel 486SX JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 2-3 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP44-47 1-2, 3-4 On (5V)
  • Page 28 Green 486 VL-Bus System Board Intel 486SX-S JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 2-3 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP44-47 1-2, 3-4 On (5V) 2-20 u Installation Overview...
  • Page 29 G486-EVB Intel 486DX/DX2 JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP44-47 1-2, 3-4 On (5V) Installation Overview u 2-21...
  • Page 30 Green 486 VL-Bus System Board Intel 486DX/DX2-S JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP44-47 1-2, 3-4 On (5V) 2-22 u Installation Overview...
  • Page 31 G486-EVB Intel 486DX4 (75/100) JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP46 5-6, 7-8 On (5V) On (3.45V)
  • Page 32 Green 486 VL-Bus System Board Intel DX4 OverDrive (5V) JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP46 1-2, 3-4 On (5V)
  • Page 33 G486-EVB Intel Write-back 486 CPU (5V) JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 1-2, 3-4 2-3 On 1-2, 3-4 JP24 JP30 JP28 JP29 JP32 1-2, 3-4 On 1-2 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34...
  • Page 34 Green 486 VL-Bus System Board Intel Pentium OverDrive (Internal Cache Write-Back Mode) JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 1-2 On 2-3 On JP45 JP47 JP44 JP46 JP33 JP34...
  • Page 35 G486-EVB Cyrix 486SX (WT) JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 2-3 On 1-2 On 2-3 On JP24 JP30 JP28 JP29 JP32 2-3 On 2-3 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP44-47 1-2, 3-4 On Installation Overview u 2-27...
  • Page 36 Green 486 VL-Bus System Board Cyrix 486SX (WB) JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 2-3 On 2-3 On 2-3 On JP24 JP30 JP28 JP29 JP32 2-3, 4-5 On 2-3, 4-5 On 2-3 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP44-47...
  • Page 37 G486-EVB Cyrix 486DX/DX2 (WT) JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 2-3 On 1-2 On 2-3 On JP24 JP30 JP28 JP29 JP32 2-3 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP44-47 1-2, 3-4 On...
  • Page 38 Green 486 VL-Bus System Board Cyrix 486DX/DX2 (WB) JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 2-3 On 2-3 On 2-3 On JP24 JP30 JP28 JP29 JP32 2-3, 4-5 On 2-3, 4-5 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34...
  • Page 39 G486-EVB Cyrix 486DX2V-50 (WT) JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 2-3 On 1-2 On 2-3 On JP24 JP30 JP28 JP29 JP32 2-3 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP46 1-2, 3-4 On On (3.45V)
  • Page 40 Green 486 VL-Bus System Board Cyrix 486DX2V-66 (WT) JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 2-3 On 1-2 On 2-3 On JP24 JP30 JP28 JP29 JP32 2-3 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP45 1-2, 3-4 On On (3.6V)
  • Page 41 G486-EVB Cyrix 486DX2V-80 (WT) JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 2-3 On 1-2 On 2-3 On JP24 JP30 JP28 JP29 JP32 2-3 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP44 1-2, 3-4 On...
  • Page 42 Green 486 VL-Bus System Board Cyrix 486DX2V-50 (WB) JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 2-3 On 2-3 On 2-3 On JP24 JP30 JP28 JP29 JP32 2-3, 4-5 On 2-3, 4-5 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34...
  • Page 43 G486-EVB Cyrix 486DX2V-66 (WB) JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 2-3 On 2-3 On 2-3 On JP24 JP30 JP28 JP29 JP32 2-3, 4-5 On 2-3, 4-5 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36...
  • Page 44 Green 486 VL-Bus System Board Cyrix 486DX2V-80 (WB) JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 2-3 On 2-3 On 2-3 On JP24 JP30 JP28 JP29 JP32 2-3, 4-5 On 2-3, 4-5 On 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34...
  • Page 45 G486-EVB Cyrix M1SC JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 1-2, 3-4 2-3 On 1-2, 3-4 JP24 JP30 JP28 JP32 JP29 1-2, 3-4 On 1-2 On 1-2 On 1-2, 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP47...
  • Page 46 Green 486 VL-Bus System Board Cyrix 486DX4V M9 JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 1-2, 3-4 2-3 On 1-2, 3-4 JP24 JP30 JP28 JP32 JP29 1-2, 3-4 On 1-2 On 1-2 On 1-2, 3-4 On JP45 JP47 JP44 JP46 JP33 JP34...
  • Page 47 G486-EVB AMD 486DX/DX2 JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP44-47 1-2, 3-4 On Installation Overview u 2-39...
  • Page 48 Green 486 VL-Bus System Board AMD 486DXL/DXL2 JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP44-47 1-2, 3-4 On 1-2, 3-4 On 2-40 u Installation Overview...
  • Page 49 G486-EVB AMD 486DX2 NV8T JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP46 5-6, 7-8 On 7-8 On On (3.45V) Installation Overview u 2-41...
  • Page 50 Green 486 VL-Bus System Board AMD 486DX4 NV8T (75/100) JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP46 5-6, 7-8 On 5-6 On On (3.45V) 2-42 u Installation Overview...
  • Page 51 G486-EVB AMD 486DX4 NV8T (50/66/80) JP15 JP18 JP23 JP16 JP17 JP22 1-2 On 1-2 On JP24 JP30 JP28 JP29 JP32 1-2 On 3-4 On JP45 JP47 JP44 JP46 JP33 JP34 JP36 JP46 5-6, 7-8 On 7-8 On On (3.45V) Installation Overview u 2-43...
  • Page 52 Green 486 VL-Bus System Board AMD 486DX2 SV8B (Internal Cache Write-Back Mode) JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 1-2, 3-4 2-3 On 1-2, 3-4 JP24 JP30 JP28 JP29 JP32 1-2, 3-4 On 1-2 On 1-2 On 3-4 On JP45 JP47 JP44...
  • Page 53 G486-EVB AMD 486DX4 SV8B (Internal Cache Write-Back Mode) JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 1-2, 3-4 2-3 On 1-2, 3-4 JP24 JP30 JP28 JP29 JP32 1-2, 3-4 On 1-2 On 1-2 On 3-4 On JP45 JP47 JP44 JP46...
  • Page 54 Green 486 VL-Bus System Board AMD 486DX2 SV8B (Internal Cache Write-Through Mode) JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 1-2, 3-4 2-3 On 1-2, 3-4 JP24 JP30 JP28 JP29 JP32 1-2, 3-4 On 1-2 On 1-2 On 3-4 On JP45 JP47 JP44...
  • Page 55 G486-EVB AMD 486DX4 SV8B (Internal Cache Write-Through Mode) JP15 JP18 JP23 JP16 JP17 JP22 2-3 On 1-2, 3-4 2-3 On 1-2, 3-4 JP24 JP30 JP28 JP29 JP32 1-2, 3-4 On 1-2 On 1-2 On 3-4 On JP45 JP47 JP44 JP46...
  • Page 56 Green 486 VL-Bus System Board Jumpers S1, S2 and S3 Clock Selection These jumpers should be set to match the speed of the CPU installed on the G486-EVB system board. CPU Speed 25MHz 33MHz* 40MHz * Default setting 2-48 u Installation Overview...

  • Page 57: Installing Upgrade Cpus

    CPU pins. The location of the ZIF socket on the G486-EVB system board is shown below. EC802G EC100G Socket Pin 1 of the socket Location of the ZIF Socket on the G486-EVB System Board Installation Overview u 2-49...
  • Page 58 Green 486 VL-Bus System Board Warning: Open the socket only if actually installing an upgrade CPU. The warranty on the original CPU will be voided if the S/N seal is broken. Installation of an OverDrive Processor will not affect the original system warranty. The 237-pin ZIF socket consists of four rows of pin holes on each side.
  • Page 59 G486-EVB To install an upgrade CPU, move the handle of the ZIF socket upward. Position the upgrade CPU above the socket. Make sure pin 1 of the CPU is aligned with pin 1 of the socket. Lower the chip until the pins are inserted properly in their corresponding holes.
  • Page 60 Green 486 VL-Bus System Board Handle Lifting the Handle CPU Pin 1 Positioning the CPU Above the ZIF Socket 2-52 u Installation Overview...
  • Page 61 G486-EVB Gently push the handle down until the handle locks into place. You will hear a click when the handle is secure. Clearance Requirements The processor comes with a heat sink mounted on top. To maintain proper airflow once the upgrade is installed on the system board, the processor and heat sink require certain space clearance.

  • Page 62: Installing The System Board

    Green 486 VL-Bus System Board Installing the System Board Before installing the system board into your system unit, you should prepare the tools you will use: You will need: • one medium size, flat-bladed screwdriver • one medium Phillips screwdriver •...
  • Page 63 G486-EVB Step 5 Insert the HSIM modules into the HSIMM banks on the G486-EVB. The quantity and location of the HSIM modules are dependent upon the memory configuration and type of modules you intend to use. Step 6 Set the appropriate jumpers.

  • Page 64: Initial Setup Program

    Green 486 VL-Bus System Board v Initial Setup Program After you power up your system, the BIOS message appears on your screen and the memory count begins. After the memory test, the following message will appear on the screen: Press CTRL-ALT-ESC/DEL to enter setup If you want to enter Setup and the message disappears before you respond, restart your system or press the “Reset”...

  • Page 65: Award Bios Cmos Setup Utility

    G486-EVB Award BIOS CMOS Setup Utility Press <Ctrl> <Alt> <Esc> or <Del> to enter the Setup utility. A screen similar to the one below will appear. Use the arrow keys to highlight the option you want and press <Enter>. Standard CMOS Setup Use the arrow keys to highlight the “Standard CMOS...
  • Page 66 Drive C and Drive D If you have added a hard drive, you must select the appropriate type for the drive. The G486-EVB has 46 pre-set types and one user-definable type. Use the <Page Up> or <Page Down> keys to select the appropriate type for the drive.
  • Page 67 G486-EVB If none of the pre-set types is appropriate for your hard drive, choose “User,” which is the user-definable type. To use this type, highlight either hard disk C or D, depending on your hard drive configuration. Use the arrow keys until type “User” is showing. Fill in all the parameters as specified by the drive manufacturer.

  • Page 68: Bios Features Setup

    Green 486 VL-Bus System Board All, But Keyboard: The system will stop for any errors except a keyboard error. All, But Diskette: The system will stop for any errors except a disk error. All, But Disk/Key: The system will stop for any errors except a keyboard or disk error.
  • Page 69 G486-EVB The Virus Warning option may be set to “enabled” or “disabled.” When enabled, the BIOS issues a warning when any program or virus sends a Disk Format com- mand or attempts to write to the boot sector of the hard disk drive.

  • Page 70: Chipset Features Setup

    Press <Esc> after making the changes to return to the main menu. Chipset Features Setup The G486-EVB uses the EFAR EC802G chipset. The Chipset Features Setup allows you to modify some functions to optimize system performance. If you press <Enter>, a screen similar to the one below will appear.

  • Page 71: Power Management Setup

    G486-EVB Use the arrow keys to move the highlight bar to the option you wish to change or modify. Use the <Page Up>, <Page Down>, <+> or <-> keys to make the corresponding changes. If the changes you make are incorrect or you change your mind, press <F6>...

  • Page 72: Load Bios Defaults

    Green 486 VL-Bus System Board Use the arrow keys to move the highlight bar to the option you wish to change or modify. Use the <Page Up>, <Page Down>, <+> or <-> keys to make the corresponding changes. Load BIOS Defaults If, for some reason, the CMOS becomes corrupted, the system can be reconfigured with the default values stored in the ROM chips.

  • Page 73: Password Setting

    G486-EVB Type “Y” and press <Enter> to return to the Setup default values. After pressing <Enter>, you will be returned to the main menu. Password Setting If you want to set a password, make sure that the Secu- rity Option under the BIOS Features Setup is set to “System”...

  • Page 74: Ide Hdd Auto Detection

    <Enter>. A screen similar to the one below will appear. The G486-EVB supports three HDD modes: Normal, LBA, and Large. If your HDD does not support LBA mode, the “LBA” option under Mode will not appear. If your HDD has 1024 or fewer cylinders, the “Large”...
  • Page 75 G486-EVB Normal Mode Normal mode is the generic access mode in which neither the BIOS nor the IDE controller will make any transformations during accessing. The maximum number of cylinders, heads and sectors for Normal mode are 1024, 16 and 63.
  • Page 76 8.4 Gigabyte Large Mode The Large mode is the extended HDD access mode supported by the G486-EVB system board. Some IDE HDDs have more than 1024 cylinders without LBA support (in some cases, you may not want the LBA mode). The system board provides another alternative to support these kinds of HDD.

  • Page 77: Save And Exit Setup

    G486-EVB Note: To support LBA or Large mode HDDs, there must be some software involved. All of this software is included in the Award HDD Service Routine (INT13h). It may fail to access a HDD with LBA or Large mode selected if you are running under an operating system which replaces the entire INT13h.
  • Page 78 Green 486 VL-Bus System Board Type “Y” and press <Enter>. The system will reboot and you will once again see the initial diagnostics on the screen. If you wish to make any changes to the setup, press <Ctrl> <Alt> <Esc> or <Del> after memory testing is done.

  • Page 79: Troubleshooting

    G486-EVB v Troubleshooting If you experience difficulty with the G486-EVB system board, please refer to the checklist below. If you still cannot isolate the problem, please contact your dealer. 1. Check the jumper settings to ensure that the jumpers are properly set. If in doubt, refer to the “Board Configuration”...

  • Page 80: Appendix A: Types Of Modules

    Green 486 VL-Bus System Board v Appendix A: Types of Modules The G486-EVB system board allows you to populate memory with 256K x 36, 1M x 36, and 4M x 36 HSIM modules. The following modules have been tested with this board.

  • Page 81: Appendix B: System Error Report

    G486-EVB v Appendix B: System Error Report 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 a message PRESS F1 TO CONTINUE, CTRL-ALT-ESC or DEL TO ENTER SETUP will be shown in the information box at the bottom.
  • Page 82 Green 486 VL-Bus System Board DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER No boot device was found. Insert a system disk into Drive A and press <Enter>. If you assumed the system would boot from the hard drive, make sure the control- ler is inserted correctly and all cables are properly attached.
  • Page 83 G486-EVB 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 on the hard drive.
  • Page 84 Green 486 VL-Bus System Board MEMORY SIZE HAS CHANGED SINCE LAST BOOT Memory has been added or removed since the last boot. Enter Setup and enter the new memory size in the memory fields. MEMORY VERIFY ERROR AT... Indicates an error verifying a value already written to memory.
  • Page 85 G486-EVB RAM PARITY ERROR - CHECKING FOR SEGMENT Indicates a parity error in Random Access Memory. SYSTEM HALTED, (CTRL-ALT-DEL) TO REBOOT... Indicates the present boot attempt has been aborted and the system must be rebooted. Press and hold down the CTRL and ALT keys and press DEL.

  • Page 86: Appendix C: Memory And I/O Maps

    Green 486 VL-Bus System Board v Appendix C: Memory & I/O Maps Memory Address Map Address Name Function 0000000 to 640K System System Board Memory 009FFFF Board RAM 00A0000 to 128K Video Reserved for Graphics Display 00BFFFF Display Memory Memory 00C0000 to 192K I/O Reserved for ROM on I/O...
  • Page 87 G486-EVB I/O Address Map I/O Address Function 000-01F DMA Controller 1, 8237A-5 020-03F Interrupt Controller 1, 8259A, Master 040-05F Timer, 8254-2 060-06F 8742 (Keyboard Controller) 070-07F Real-time Clock, NMI (Non-maskable Interrupt) Mask 080-09F DMA Page Memory, 74LS612 0A0-08F Interrupt Controller 2, 8259A...

  • Page 88: Appendix D: 16-Bit Isa I/O Pin Assignments

    Green 486 VL-Bus System Board v Appendix D: 16-Bit ISA I/O Pin Assignments -I/O Chck - 01 - Reset Drv - 02 - +5V DC - 03 - IRQ9 - 04 - -5V DC - 05 - DRQ2 - 06 - -12V DC - 07 - O W S...

  • Page 89: Appendix E: Vl-Bus I/O Pin Assignments

    G486-EVB v Appendix E: VL-Bus I/O Pin Assignments Component Side Solder Side DAT00 - 01 - DAT01 DAT02 - 02 - DAT03 DAT04 - 03 - DAT06 - 04 - DAT05 DAT08 - 05 - DAT07 - 06 - DAT09...
  • Page 90 Green 486 VL-Bus System Board Pin Name ADR<31..2> ADS# BE<3..0> BLAST# BRDY# D/C# DAT<31..0> ID<4..0> IRQ9 LBS16# LCLK LDEV<x># LEADS# LGNT<x># LKEN# LRDY# LREQ<x># M/IO# RDYRTN# RESET# W/R# WBACK# (power) (ground) (reserved) Total per slot Direction of signals for the LBC if the host CPU or a system I/O bus master is active.

  • Page 91: Appendix F: Connector Pin Assignments

    G486-EVB v Appendix F: Connector Pin Assignments Connector JP14 External Battery Connector Function Voltage Reserved Ground Ground Connector JP40 Power LED/Keylock Connector Function LED Signal Reserved Ground Keylock Signal Ground F-1 u Appendix F...
  • Page 92 Green 486 VL-Bus System Board Connector JP41 Speaker Connector Function Signal Connector to Buzzer Ground Connector D6 Standby Mode LED Function Ground Signal Jumper JP44 Standby Mode Switch Connector Function Ground Signal Appendix F u F-2...
  • Page 93 G486-EVB Connector JP45 Reset Switch Connector Function Reset Ground F-3 u Appendix F...

  • Page 94: Appendix G: Award Bios Hard Disk Table

    Green 486 VL-Bus System Board v Appendix G: Award BIOS Hard Disk Table Example Type Size Cylinders Heads Sectors Write Land (MB) Precomp Zone Model TEAC SD510, MMI 112, 5412 Seagate ST225, ST4026 None Seagate ST125, Tandon TM262 None Tandon TM 703 None None None...
  • Page 95 G486-EVB Example Type Size Cylinders Heads Sectors Write Land (MB) Precomp Zone Model 1024 None 1023 Maxtor 1085, Micropolis 1325 None 1023 Maxtor 1105 1120, 4780 None 1023 Maxtor 1170 1024 None CDC 9415 1024 None 1023 1024 None 1023...
  • Page 96 G486-EVB Rev . C System Board User’ s Manual - 24350415 -...

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