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DFI 486-OCV Plus User Manual

Dfi 486-ocv plus system board user's manual
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486-OCV Plus

System Board

User' s Manual
- D21840429 -

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Summary of Contents for DFI 486-OCV Plus

  • Page 1: System Board

    486-OCV Plus System Board User’ s Manual - D21840429 -...
  • Page 2 Further, DFI, Inc. assumes no responsibility for any errors that may appear in this document. DFI is a registered trademark, and 486-OCV Plus is a trademark of Diamond Flower, Inc. All other product names mentioned are trademarks or registered trade-...

  • Page 3: Table Of Contents

    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 ............Jumper Settings ............
  • Page 4 Change Password ............Auto Detect Hard Disk ..........Hard Disk Utility ............. 3-10 Write to CMOS and Exit ..........3-11 Do not write to CMOS and Exit ........3-11 Troubleshooting Checklist ............Appendix A: Types of Modules ..........Appendix B: System Error Report ......... Appendix C: Memory &...

  • Page 5: Introduction

    486-OCV Plus v Introduction The 486-OCV Plus system board is designed so that it may be equipped with Intel's 80486DX, 80486DX2, 80486SX, and 80486 OverDrive Processors which can run from speeds of 25MHz to 66MHz. It may also use a Pentium OverDrive Processor running at 50MHz or 66MHz.

  • Page 6: Features And Specifications

    Pentium OverDrive Ready System Board The 486-OCV Plus uses 256Kx36, 512Kx36, 1Mx36, 2Mx36, 4Mx36 and 8Mx36 HSIM modules with speeds of at least 80ns. The memory can be configured to twenty-one different sizes from 1MB to 64MB. The system is equipped with two 32-bit VESA VL-Bus and eight 16-bit ISA expansion slots.
  • Page 7 C - 40 • One year limited warranty Warning: If your 486-OCV Plus system board is using a 486DX 50 CPU, we recommend that you do not install any VL-Bus devices. The VL-Bus connectors, compliant with VESA VL-Bus standard rev. 1.0, limit the speed of a VL-Bus device operating across the connector (e.g.

  • Page 8: Installation Overview

    OverDrive Ready System Board v Installation Overview This chapter summarizes the steps in installing the 486-OCV Plus 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 9: Handling The System Board

    Hold modules and connectors by their ends. Hardware Installation Memory Installation The 486-OCV Plus system board can support 1MB to 64MB of memory using HSIMMs. HSIMM is an acronym for High Density Single In-line Memory Mod- ule. Installation Overview u 2-2...
  • Page 10 An HSIMM connects to the system board via a 72-pin card-edge connector. The HSIMM sockets are divided into four banks on the system board. The 486-OCV Plus system board uses 256Kx36, 512Kx36, 1Mx36, 2Mx36, 4Mx36 and 8Mx36 HSIM modules.
  • Page 11 486-OCV Plus Memory Size Bank 0 Bank 1 Bank 2 Bank 3 256Kx36 256Kx36 256Kx36 512Kx36 1Mx36 256Kx36 1Mx36 256Kx36 256Kx36 1Mx36 512Kx36 1Mx36 1Mx36 1Mx36 2Mx36 1Mx36 1Mx36 256Kx36 2Mx36 256Kx36 12MB 1Mx36 1Mx36 1Mx36 12MB 2Mx36 1Mx36 13MB...
  • Page 12 Pentium OverDrive Ready System Board Memory Size Bank 0 Bank 1 Bank 2 Bank 3 34MB 256Kx36 256Kx36 4Mx36 4Mx36 34MB 512Kx36 8Mx36 36MB 1Mx36 4Mx36 4Mx36 36MB 4Mx36 1Mx36 4Mx36 36MB 4Mx36 4Mx36 1Mx36 36MB 8Mx36 1Mx36 40MB 1Mx36 1Mx36 4Mx36 4Mx36...

  • Page 13: Installing The Modules

    486-OCV Plus OPTi 82C499 Bank 0 Bank 1 Bank 2 Bank 3 Pin 1 of the HSIMM socket Locations of the HSIMM Sockets on the System Board Installing the Modules HSIMMs simply snap into a socket on the system board.

  • Page 14: Board Configuration

    Tilt the module upright until it locks in place in the socket. Board Configuration The 486-OCV Plus is designed with jumpers and con- nectors onboard. Make sure that the jumpers are set correctly before installing the system board into your system unit.

  • Page 15: Jumper Settings

    If a VL-Bus add-on board is installed in the 486-OCV Plus system board, make sure Jumpers JP18, JP23, JP24 and JP34 are set correctly. JP18 JP23 JP24 JP34 OPTi 82C499 Locations of Jumpers JP18, JP23, JP24 and JP34 on the 486-OCV Plus System Board Installation Overview u 2-8...
  • Page 16 On: One Wait State Jumper JP24 CPU Speed for VL-Bus Board If a VL-Bus board is installed in the 486-OCV Plus system board, Jumper JP24 must be set to On if the CPU speed is greater than 33MHz. If the CPU speed is less than or equal to 33MHz, set JP24 to Off.
  • Page 17 No Delay Jumper JP34 VL-Bus Address Select If the 486-OCV Plus system board is using a 40MHz or 50MHz 486DX CPU, VESA VL-Bus add-on boards may not work when Jumper JP34 is set to "No Delay". In this case, we recommend that you set Jumper JP34 pins 1-2 and 3-4 to On, "Delay 1 PCLK".

  • Page 18: Jumper Settings Of Internal/External/Cmos Clean, Display Type And Diagnostic/Password Clear

    CMOS Clean. JP29 allows you to select between a color or monochrome display. JP39 allows you to perform diagnostic test and clear the password. JP39 JP29 OPTi 82C499 Locations of Jumpers J11, JP29 and JP39 on the 486-OCV Plus System Board 2-11 u Installation Overview...
  • Page 19 486-OCV Plus Jumper J11 Internal Battery/CMOS Clean Select The 486-OCV Plus comes with an internal battery. If there is a problem with the internal battery, or if you prefer to connect an external battery, set Jumper J11 pins 1-2-3 to Off and connect an external battery to Connector J10.
  • Page 20 If you had enabled the Password Checking Option in the Advanced CMOS Setup and forgot your password, set Jumper JP39 to On. The 486-OCV Plus system board will perform diagnostic test and clear the password stored in your CMOS. Set JP39 to Off after you have cleared the password.

  • Page 21: Cache Configuration

    RAM size is dependent on the size of cache installed on your system board. The system board can automatically detect the cacheable system RAM size based on the size of cache installed in the 486-OCV Plus system board. The following table summarizes the cacheable system RAM size for the corresponding cache size.
  • Page 22 Pentium OverDrive Ready System Board Locations of the SRAM Sockets on the 486-OCV Plus System Board Cache Size U14/U15/U16/U17 U19/U20/U21/U22 64KB 8K x 8 8K x 8 8K x 8 128KB* 32K x 8 None 8K x 8 256KB 32K x 8...

  • Page 23: Jumper Settings For Cache Memory

    486-OCV Plus Jumper Settings for Cache Memory OPTi JP7 JP8 82C499 Locations of Jumpers JP6-JP9 on the 486-OCV Plus System Board Installation Overview u 2-16...
  • Page 24 Pentium OverDrive Ready System Board Cache Memory Size Jumpers 64KB 128KB* 256KB 2-3 On 1-2 On 2-3 On 2-3 On 1-2 On 2-3 On * Default setting 2-3 On 1-2 On 2-17 u Installation Overview...

  • Page 25: Cpu Installation And Upgrade

    Make sure the jumpers are set correctly before applying power, or you may damage the CPU or system board. CPU Configuration Location U8 of the 486-OCV Plus system board is a 237-pin ZIF socket for the Intel 486 family of CPUs,...

  • Page 26: Jumper Settings For Cpus

    Locations of Jumpers JP12-JP14, JP25 and JP38 on the 486-OCV Plus System Board Jumpers JP12-JP14 and JP25 Clock Selection These jumpers should be set to match the speed of the CPU installed on the 486-OCV Plus system board. 2-19 u Installation Overview...
  • Page 27 1-2 On 486DX-50 1-2 On 1-2 On 2-3 On Jumper JP38 CPU Type Selection Jumper JP38 should be set to match the type of CPU installed on the 486-OCV Plus system board. Off: Cyrix CPU Intel/AMD CPU Installation Overview u 2-20...
  • Page 28 The jumpers below are for factory testing only and should always be set to their default configurations. Reconfiguring these jumpers will cause problems with your 486-OCV Plus system board. JP26: 1-2 On JP31: 1-2 On JP32: BIOS ROM Type Select...

  • Page 29: Installing Upgrade Cpus

    486-OCV Plus Installing Upgrade CPUs The 486-OCV Plus is equipped with a 237-pin Zero Insertion Force (ZIF) socket at location U8 of the system board. The 486-OCV Plus accommodates all of the Intel 486 and 5V Pentium family of OverDrive processors, and Cyrix or AMD 486DX-40 CPU.
  • Page 30 Pentium OverDrive Ready System Board Install the 80486SX, 80486DX, 80486DX2 or the 80486 OverDrive Processor, which only has three rows of pins, in the three inner rows of the socket. The outermost row of pin holes should be visible on all four sides of the socket when any of these CPUs is installed.
  • Page 31 486-OCV Plus CPU Pin 1 Positioning the CPU Above the ZIF Socket Gently push the handle down until the handle locks into place. You will hear a click when the handle is secure. When you want to remove the chip, simply lift the handle and remove the chip.
  • Page 32 Pentium OverDrive Ready System Board Cable Adequate airflow for cooling must be provided over the CPU. For Pentium OverDrive Processors, the airflow must be adequate to keep the system temperature below C, measured 0.5 inch above the CPU and assuming a room temperature of 25 2-25 u Installation Overview...

  • Page 33: Installing The System Board

    486-OCV Plus 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 Philips screwdriver Step 1 Unlock your system unit. Turn off the power and dis- connect all power cords and cables.
  • Page 34 OverDrive Ready System Board Step 5 Insert the SIM modules into the SIMM banks on the 486-OCV Plus. The quantity and location of the SIM modules is dependent upon the memory configuration and type of modules you intend to use.

  • Page 35: Initial Setup Program

    486-OCV Plus 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 message below will appear on the screen if your CMOS Setup is correct: Enter CURRENT Password: The default password is AMI.

  • Page 36: Ami Bios Setup Utilities

    Pentium OverDrive Ready System Board AMI BIOS Setup Utilities If you want to change your CMOS setup, press <Del> when the message, "Hit <Del> if you want to run setup", appears on the screen. Again, if you enabled the pass- word option, you will be prompted to the message below: Enter CURRENT Password:...

  • Page 37: Standard Cmos Setup

    486-OCV Plus This message warns you that inappropriate modifications may cause problems. Press <Enter> to continue or <Esc> to abort. If the system fails after the setup procedure, power off the computer and turn it on again. Wait for the message, "Hit <Del> if you want to run setup", and press <Del>.
  • Page 38 The Daylight Savings function is intended for use in notebook computers and is not supported by the 486-OCV Plus, so it does not matter how it is set. On the lower right hand corner is a calendar that shows the current date.

  • Page 39: Advanced Cmos Setup

    486-OCV Plus If none of the pre-set types is appropriate for your hard drive, choose 47, which is the user-definable type. To use this type, highlight either hard disk C or D, depend- ing on your hard drive configuration. Use the <Page Up>...
  • Page 40 Pentium OverDrive Ready System Board Set the password checking option to "Always" or "Setup" if you want to enable this option. Setting it to "always" will prompt you for a password every time you cold boot your system or access setup. When you set the option to "Setup", you will be prompted for a pass- word only when trying to access setup.

  • Page 41: Auto Configuration With Bios Defaults

    486-OCV Plus Auto Configuration with BIOS Defaults If, for some reason, the CMOS becomes corrupted, the system can be reconfigured with the default values stored in the ROM chips. The BIOS Setup default values should provide optimum performance for the system.

  • Page 42: Change Password

    Pentium OverDrive Ready System Board Change Password The default password is AMI. If you want to change the password, make sure you set the Password Checking Option to "Always" or "Setup" under Advanced CMOS Setup. If not, the error message below will appear on the screen: <Password Option>...

  • Page 43: Auto Detect Hard Disk

    486-OCV Plus Press any key on the keyboard to return to the message below: Enter NEW Password: Type in a password that is six characters long or shorter. When done, you will be asked to verify the new password: Re-enter NEW Password: Type in exactly the same password.

  • Page 44: Hard Disk Utility

    Pentium OverDrive Ready System Board The screen displays the parameters detected and allows you to accept or reject the parameters. Type "Y" and press <Enter> to accept the parameters or press <Esc> to abort. If you select "Y", the parameters for hard disk Type 47 will be displayed in Standard CMOS Setup.

  • Page 45: Write To Cmos And Exit

    486-OCV Plus Use the arrow keys to select the desired options, and press <Esc> to exit when done. Write to CMOS and Exit When all the changes have been made, highlight "Write to CMOS and Exit" and press <Enter>. The message...

  • Page 46: Troubleshooting Checklist

    Pentium OverDrive Ready System Board v Troubleshooting Checklist If you experience difficulty with the 486-OCV Plus 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.

  • Page 47: Appendix A: Types Of Modules

    486-OCV Plus v Appendix A: Types of Modules The 486-OCV Plus system board allows you to populate memory with 256Kx36, 512Kx36, 1Mx36, 2Mx36, 4Mx36 and 8Mx36 SIM modules. The following mod- ules have been tested with this board. Most untested brands will work but a few may fail to do so.
  • Page 48 Pentium OverDrive Ready System Board For SIM 2Mx36 Modules Brand Chip Number Fujitsu 814400-80 M511000B-70J A-2 u Appendix A...

  • Page 49: Appendix B: System Error Report

    486-OCV Plus v Appendix B: System Error Report During the POST (Power On Self Test) routines, which are performed each time the system is powered on, errors may occur. Errors can be fatal or non-fatal. Fatal Errors Fatal errors are those which will not allow a system to continue the boot-up procedure.
  • Page 50 Pentium OverDrive Ready System Board Non-Fatal Errors Non-fatal errors are those which, in most cases, allow the system to continue the boot-up process. The error messages normally appear on the screen. Error Message CH-2 Timer Error INTR #1 Error INTR #2 Error CMOS Battery State Low CMOS Checksum Failure CMOS Options Not Set...

  • Page 51: Appendix C: Memory & I/O Maps

    486-OCV Plus 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...
  • Page 52 Pentium OverDrive Ready System Board 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 0C0-0DF...

  • Page 53: Appendix D: 16-Bit Isa I/O Pin Assignments

    486-OCV Plus 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...

  • Page 54: Appendix E: Vl-Bus I/O Pin Assignments

    Pentium OverDrive Ready System Board v Appendix E: VL-Bus I/O Pin Assignments DAT00 DAT01 - 01 - DAT02 DAT03 - 02 - DAT04 - 03 - DAT06 DAT05 - 04 - DAT08 DAT07 - 05 - DAT09 - 06 - DAT10 DAT11 - 07 -...
  • Page 55 486-OCV Plus 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 56: Appendix F: System Overview

    Pentium OverDrive Ready System Board v Appendix F: System Overview 82C206 Integrated Peripherals Controller The 486-OCV Plus uses an 82C206 integrated peripher- als controller that supports the following: DMA Channels DMA Controller 1 DMA Controller 2 Ch0-Reserved for User Ch4-Cascade for CTRL 1...

  • Page 57: System Interrupts

    DMA Channel 5 System Interrupts Parity or I/O Channel Check Note: The non-maskable interrupt (NMI) of the 486-OCV Plus is used to report memory parity errors. The memory parity is derived from the system board memory and I/O adapter optional memory.
  • Page 58 Pentium OverDrive Ready System Board Note: Any or all interrupts including NMI may be masked. The 15 levels of system interrupts from high to low are ordered as: IRQ0>IRQ1>IRQ8>IRQ9>IRQ10>IRQ11 >IRQ12>IRQ13>IRQ14>IRQ15>IRQ3>IRQ4>IRQ5> IRQ6>IRQ7. System Timers Channel 0 System Timer (IRQ0) Channel 1 Refresh Request Generator (15us Rate Generator Period Signal) Channel 2...
  • Page 59 486-OCV Plus RAM Module The DRAM memory on the 486-OCV Plus system board can be expanded to a total of 64MB using 256Kx36, 512Kx36, 1Mx36, 2Mx36, 4Mx36 and 8Mx36 HSIMMs. The DRAM controller uses a page mode design with an access time of 80ns or less.

  • Page 60: Appendix G: Connector Pin Assignments

    Pentium OverDrive Ready System Board v Appendix G: Connector Pin Assignments Jumper J1 Diagnostic LCD Port Function Connector J2 Keyboard Connector Function Keyboard Clock Keyboard Data Ground G-1 u Appendix G...
  • Page 61 486-OCV Plus Jumper J3 Speaker Connector Function Speaker Ground Jumper J4 Keylock Connector Function LED Power Ground Keyboard Inhibitor Ground Appendix G u G-2...
  • Page 62 Pentium OverDrive Ready System Board Jumper J5 Turbo LED Connector Function -LED Power Jumpers J6/J8 Reset Switch Connectors Function Ground Reset Switch Jumper J7 Turbo Switch Connector Function Switch G-3 u Appendix G...
  • Page 63 486-OCV Plus Jumper J9 PS/2 Mouse Connector Function Mouse Data N. C. Mouse Clock N. C. Jumper J10 External Battery Connector Function Battery +3.6V Ground Ground Appendix G u G-4...
  • Page 64 Pentium OverDrive Ready System Board Power Connector PL1 and PL2 Connectors Function Power Good +12V -12V Ground Ground Ground Ground G-5 u Appendix G...

  • Page 65: Appendix H: Ami Bios Hard Disk Table

    486-OCV Plus v Appendix H: AMI BIOS Hard Disk Table Type Cyln Head WPcom LZone Sect Size 10MB 20MB 31MB 62MB 47MB 65535 20MB 31MB 65535 30MB 65535 17 112MB 65535 20MB 65535 35MB 65535 50MB 28MB 65535 43MB 20MB...
  • Page 66 Pentium OverDrive Ready System Board Type Cyln Head WPcom LZone Sect Size 53MB 1024 65535 1024 94MB 1024 65535 1024 128MB 1024 1024 1024 43MB 10MB 1024 65535 1024 77MB 1024 1024 68MB 41MB 25MB 57MB 41MB 41MB 41MB 48MB 65535 69MB 65535...
  • Page 67 486-OCV Plus System Board User’ s Manual - 21840429 -...

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