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DFI G486VPA User Manual

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G486VP A
Rev. A +
System Board
User' s Manual
- D26450623 -

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Summary of Contents for DFI G486VPA

  • Page 1 G486VP A Rev. A + System Board User’ s Manual - D26450623 -...
  • Page 2 Further, DFI, Inc. assumes no responsibility for any errors that may appear in this document. DFI is a registered trademark, and G486VPA 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 ......... Package Checklist ............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 Initial Setup Program .............. Award BIOS CMOS Setup Utilities ........Standard CMOS Setup ..........BIOS Features Setup ............ Chipset Features Setup ..........Power Management Setup ........... PCI Configuration Setup ..........Load BIOS Defaults ............3-10 Load Setup Defaults ............. 3-10 Password Setting ............

  • Page 6: Introduction

    BIOS which can be erased in bulk or modified using a software utility. The G486VPA is equipped with three PCI slots, three ISA slots and one shared PCI/ISA slot. Equipped with one built-in VL-Bus IDE connector and...

  • Page 7: Features And Specifications

    G486VPA Features and Specifications Processor • 5V CPUs Intel 486SX/DX/DX2 (full series) and Pentium OverDrive Processor AMD 486DX/DXL/DXL2 (full series) Cyrix 486SX/DX/DX2 (full series) • 3.3V CPUs Intel 486DX4-75/100 AMD 486DX2-66/80NV8T, 486DX4-75/100NV8T, 486DX2-66/80 SV8B (starting with Rev. A) 486DX4-75/100 SV8B...
  • Page 8 PCI/ISA System Board Super I/O Interface and Fast IDE • Two NS16C550 compatible serial ports • One parallel port with EPP and ECP support • Supports 360K, 720K, 1.2M, 1.44M and 2.88MB floppy drives • Two fast IDE connectors: Primary IDE connector provides a VL-Bus IDE Interface to support up to two Mode 3 enhanced HDDs Secondary IDE connector provides an ISA IDE...
  • Page 9 G486VPA Due to the size of the CPU with its accompanying heatsink/fan component, the following are the slot limitations: PCI/ISA shared slot and PCI slot 2 will be limited to 2/3 length PCI cards. ZIF Socket • 237-pin ZIF socket (Intel Socket 3) Board Dimensions •...

  • Page 10: Package Checklist

    PCI/ISA System Board Package Checklist The G486VPA package contains the following items: • The G486VPA system board • The G486VPA user’ s manual • One IDE driver diskette • One 34-pin floppy disk drive cable • Two 40-pin IDE hard disk cables •...

  • Page 11: Installation Overview

    G486VPA v Installation Overview This chapter summarizes the steps in installing the G486VPA 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 12: Handling The System Board

    Move items that generate magnetic fields away from your system board, since magnetic fields can damage your system board. Once you have selected the ideal location, unpack the G486VPA system board carefully. Handling the System Board It is quite easy to inadvertently damage your system board even before installing it to your system unit.

  • Page 13: Hardware Installation

    ESD protection. Hardware Installation Memory Installation The G486VPA system board can support 1MB to 128MB of memory using HSIM modules. HSIM is an acronym for High Density Single In-line Memory. A SIM module consists of several RAM chips soldered onto a small circuit board.
  • Page 14 PCI/ISA System Board Memory Size Bank 0 Bank 1 Bank 2 Bank 3 2-4 u Installation Overview...
  • Page 15 G486VPA Memory Size Bank 0 Bank 1 Bank 2 Bank 3 128M 128M 2M(D) * 2M(D) * 2M(D) * 2M(D) * 2M(D) * 2M(D) * 2M(D) * 2M(D) * 2M(D) * 2M(D) * 2M(D) * 8M(D) * 8M(D) * 8M(D) *...
  • Page 16 PCI/ISA System Board Memory Size Bank 0 Bank 1 Bank 2 Bank 3 32M(D) * 32M(D) * 32M(D) * 8M(D) * 32M(D) * 32M(D) * 32M(D) * 32M(D) * 32M(D) * 32M(D) * * (D) - Double Density Note: If a double row 36-bit SIMM (Double Density SIMM) is installed in Bank 2 or Bank 3, the other three banks cannot support 16MB modules.
  • Page 17 G486VPA BANK 3 BANK 2 BANK 1 PC87332VF BANK 0 PCI 4 VT82C496G PCI 3 PCI 2 VT82C505 PCI 1 ISA SL1 ISA SL5 VT82C406 ISA SL2 ISA SL6 ISA SL7 ISA SL3 ISA SL4 ISA SL8 • Pin 1 of the SIMM socket...

  • Page 18: Installing The Modules

    PCI/ISA System Board Installing the Modules An HSIM module simply snaps into a socket on the system board. Pin 1 of the HSIM module must corre- spond with Pin 1 of the socket. 1. Position the HSIM module above the socket with the “notch”...

  • Page 19: Board Configuration

    G486VPA Board Configuration BIOS J2 J1 JP11 JP12 VT82C505 JP14 JP16 JP15 JP13 VT82C406MV Bank 1 JP18 JP17 JP19 JP21 JP23 JP24 JP22 JP27 JP25 VT82C496G JP28 JP26 JP41 JP32 JP36-JP34 JP33 JRN1 JP31 JP39 JP37 JP42 J14 J13 J12 J11 J10...

  • Page 20: Jumper Settings For Internal/External Battery, Cmos Clean, Flash Eprom, Ps/2 Mouse

    PCI/ISA System Board Jumper Settings Jumper Settings for Internal/External Battery, CMOS Clean, Flash EPROM, PS/2 Mouse JP16 PCI 4 PCI 3 PCI 2 PCI 1 Locations of Jumpers JP1, JP2, JP4 and JP16 on the G486VPA System Board 2-10 u Installation Overview...
  • Page 21 G486VPA Jumper JP1 Internal Battery Select The G486VPA comes with an internal Lithium battery. If you wish to install an external 3.6V Lithium battery, set JP1 pins 1 and 2 to On. 1-2 On: External 2-3 On: Internal Battery Enabled...
  • Page 22 EPROM 27C010 Jumper JP16 PS/2 Mouse The G486VPA package includes a card-edge bracket with serial and mouse port. The PS/2 mouse port uses IRQ12. To enable PS/2 mouse, set Jumper JP16 pins 1 and 2 to On. Make sure you connect the PS/2 mouse port to Connector CN3.
  • Page 23 G486VPA 2-3 On: PS/2 Mouse 1-2 On: PS/2 Mouse Disabled (Default) Enabled Installation Overview u 2-13...

  • Page 24: Jumper Settings For Super I/O Setting

    PCI/ISA System Board Jumper Settings for Super I/O Setting VT82C406 JP15 Location of Jumper JP15 on the System Board 2-14 u Installation Overview...
  • Page 25 G486VPA Jumper JP15 ECP DMA Channel Select Jumper JP15 is used to select DMA channel. The DMA channel must be compatible with the I/O cards you are using. Normally, DMA3 channel supports sound cards. Set Jumper JP15 pins 1-3 and 2-4 to On unless this seting provides inadequate channel required by your system.

  • Page 26: Jumper Settings For Pci Slots

    PCI/ISA System Board Jumper Settings for PCI Slots JP13 PCI 4 PCI 3 JP11 PCI 2 VT82C505 PCI 1 Locations of Jumpers JP11 and JP13 on the G486VPA System Board 2-16 u Installation Overview...
  • Page 27 <= 33MHz (Default) Speed > 33MHz Set Jumpers JP11 and JP13 pins 2-3 to On if your G486VPA system board uses one of the following CPUs: 486DX-50, 486DX2-80, 486DX-40 or 486SX-40. The CPU external clock speed supported by each of them is greater than 33MHz.

  • Page 28: Cache Configuration

    RAM to store the cacheable addresses. The locations of the SRAM sockets on the system board are shown below. BANK 1 BANK 0 • Pin 1 of the SRAM socket Locations of the SRAM Sockets on the G486VPA System Board 2-18 u Installation Overview...
  • Page 29 G486VPA To upgrade from 256KB to 512KB of cache memory, use four pieces of 128Kx8 or eight pieces of 64Kx8 SRAM. Data SRAM Tag SRAM Cacheable Cache Size Range 128Kx8x8 128MB 128Kx8x1 or 64Kx8x1 128Kx8x4 128MB 512KB 32Kx8x1 512KB 64Kx8x8...

  • Page 30: Jumper Settings For Cache Memory

    PCI/ISA System Board Jumper Setting for Cache Memory JP37 JP38 JP22 JP39 JP23 JP24 Locations of Jumpers JP22, JP23, JP24, JP37, JP38 and JP39 on the G486VPA System Board 2-20 u Installation Overview...
  • Page 31 G486VPA 128KB Cache SRAM Bank 1 Bank 0 32Kx8 32Kx8 32Kx8 32Kx8 8Kx8 (TAG) JP37 JP38 JP22 JP39 JP23 JP24 Note: This refers to an empty SRAM socket. Installation Overview u 2-21...
  • Page 32 PCI/ISA System Board 256KB Cache SRAM Bank 1 Bank 0 64Kx8 64Kx8 64Kx8 64Kx8 32Kx8 (TAG) JP37 JP38 JP22 JP39 JP23 JP24 2-22 u Installation Overview...
  • Page 33 G486VPA 256KB Cache SRAM * Bank 1 Bank 0 32Kx8 32Kx8 32Kx8 32Kx8 32Kx8 32Kx8 32Kx8 32Kx8 32Kx8 (TAG) JP37 JP38 JP22 JP39 JP23 JP24 * Default setting Installation Overview u 2-23...
  • Page 34 PCI/ISA System Board 512KB Cache SRAM Bank 1 Bank 0 128Kx8 128Kx8 128Kx8 128Kx8 32Kx8 (TAG) JP37 JP38 JP22 JP39 JP23 JP24 2-24 u Installation Overview...
  • Page 35 G486VPA 512KB Cache SRAM Bank 1 Bank 0 64Kx8 64Kx8 64Kx8 64Kx8 64Kx8 64Kx8 64Kx8 64Kx8 32Kx8 (TAG) JP37 JP38 JP22 JP39 JP23 JP24 Installation Overview u 2-25...
  • Page 36 PCI/ISA System Board 1MB Cache SRAM Bank 1 Bank 0 128Kx8 128Kx8 128Kx8 128Kx8 128Kx8 128Kx8 128Kx8 128Kx8 128Kx8/64Kx8 (TAG) JP37 JP38 JP22 JP39 JP23 JP24 2-26 u Installation Overview...

  • Page 37: Cpu Installation

    CPU, the installation is being done incorrectly. Make sure the jumpers are set correctly before applying power, or you may damage the CPU or system board. Pin 1 Location of the ZIF Socket on the G486VPA System Board Installation Overview u 2-27...

  • Page 38: Jumper Settings For Cpu

    JP18 JP21 JP33 JP19 JP35 JP36 JP34 JP31 JP32 JP26 JP41 Locations of Jumpers JP14, JP18, JP19, JP21, JP26, JP31, JP32, JP33, JP34, JP35, JP36, JP41, JP42, JRN1, JRN2 and JRN3 on the G486VPA System Board 2-28 u Installation Overview...
  • Page 39 G486VPA Intel 486SX JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 Intel 486SX 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. These jumpers are used to select the CPU exter- nal clock speed.
  • Page 40 PCI/ISA System Board Intel 486DX/DX2 (Default Setting) JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 Intel 486DX/DX2 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. The external CPU clock speed of the Intel 486DX CPU is equal to its internal clock speed.
  • Page 41 G486VPA Intel 486DX4 JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 Intel 486DX4 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. To get the external CPU clock speed of the Intel 486DX4, divide its internal clock speed by 3.
  • Page 42 PCI/ISA System Board Intel Write-back 486 CPU JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 Intel Write-back 486 1 2 3 JP26 Note: Set Jumper JP33 pins 1 and 2 to On to support the write through mode for the Intel Write-back 486 CPU. Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly.
  • Page 43 G486VPA Intel DX4 ODP JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 Intel DX4 ODP 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. To get the external CPU clock speed of the Intel 486DX4 CPU, divide its internal CPU clock speed by 3.
  • Page 44 PCI/ISA System Board Pentium OverDrive Processor JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 Pentium OverDrive Processor 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. To get the external CPU clock speed of the Pentium OverDrive Processor, divide its internal CPU clock speed by 2.5.
  • Page 45 G486VPA Cyrix Cx486DX/DX2 JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 Cyrix Cx486DX/DX2 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. The external CPU clock speed of the Cyrix 486DX CPU is equal to its internal clock speed.
  • Page 46 PCI/ISA System Board SGS-Thomson ST486DX/DX2 JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 SGS-Thomson ST486DX/DX2 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. The external CPU clock speed of the ST486DX CPU is equal to its internal clock speed.
  • Page 47 G486VPA AMD Am486DX2 (NV8T) JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 AMD Am486DX2 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. To get the external CPU clock speed of the AMD Am486DX2 (NV8T), divide its internal CPU clock speed by 2.
  • Page 48 PCI/ISA System Board Enhanced AMD Am486DX2 (SV8B) JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 Enhanced AMD Am486DX2 (SV8B) 1 2 3 JP26 Note: Jumper JP42 is used to support Enhanced Am486DX2 CPUs. Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly.
  • Page 49 G486VPA AMD Am486DX4 JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 AMD Am486DX4 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. To get the external CPU clock speed of the AMD Am486DX4, divide its internal CPU clock speed by 3.
  • Page 50 PCI/ISA System Board UMC U5SD JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 UMC U5SD 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. The external CPU clock speed of the UMC U5SD CPU is equal to its internal CPU clock speed.
  • Page 51 G486VPA UMC U5S/U5SLV JRN1 JP42 JRN2 JRN3 JP14 JP34 JP35 JP36 1 2 3 UMC U5S/U5SLV 1 2 3 JP26 Note: Make sure Jumpers JP18, JP19 and JP21 are set cor- rectly. The external CPU clock speed of the UMC U5S or U5SLV CPU is equal to its internal CPU clock speed.
  • Page 52 PCI/ISA System Board Jumpers JP18, JP19 and JP21 CPU External Clock Speed These jumpers should be set to match the CPU external clock speed. External CPU 25 Mhz 33 Mhz * 40 Mhz 50 Mhz Clock Speed Internal CPU 25/50 Mhz 33/66/ 40/80 Mhz 50 Mhz Clock Speed...
  • Page 53 G486VPA 3.45V CPUs: 1 2 3 JP31 JP32 JP41 Intel 486 - AMD - A80486DX4-100 A80486DX4-100NV8T A80486DX4-75 A80486DX2-80NV8T A80486DX2-66NV8T UMC - A80486DX4-100SV8B U5SLV-SUPER25 A80486DX4-75SV8B U5SLV-SUPER33 A80486DX2-80SV8B A80486DX2-66SV8B Cyrix - Am486DX2-66V8T Cx486DX2-V50GP Am486DX2-80V8T Am486DX4-100V8T 3.6V CPUs: 1 2 3 JP31 JP32...

  • Page 54: Jumpers Jp8, Jp12, Jp17, Jp20, Jp25, Jp27 And Jp28

    PCI/ISA System Board Jumpers JP8, JP12, JP17, JP20, JP25, JP27 and JP28 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 system board. JP8: Off JP12, JP17: 1-2 On JP20: 1-2 On JP25: 1-2 On...

  • Page 55: Installing Upgrade Cpus

    G486VPA Installing Upgrade CPUs The G486VPA is equipped with a 237-pin Zero Insertion Force (ZIF) socket at location U27 of the system board. This socket enables you to remove the old CPU and insert the upgrade CPU easily. If you need to apply excessive force to insert the CPU, the installation is being done incorrectly.
  • Page 56 PCI/ISA System Board Clearance Requirements The Pentium OverDrive 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 clearances. The clearance above the OverDrive processor's fan/heat- sink must be at least 0.4 in.
  • Page 57 G486VPA To install an upgrade CPU in the G486VPA, follow the steps below. 1. Make sure the handle on the side of the ZIF socket is up. To raise the handle, pull it out to the side a little and raise it as far as it will go. The top plate will slide back.
  • Page 58 PCI/ISA System Board Pin 1 of the ZIF Socket 3. Position the CPU above the ZIF 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 59 G486VPA Positioning the CPU Above the ZIF Socket 4. Push the handle down until the handle locks into its place. Top plate will slide forward. You will feel some resistance as the pressure starts to secure the CPU in the socket. This is normal and will not damage the CPU.

  • Page 60: Built-In Ports

    PCI/ISA System Board Built-in Ports The G486VPA system board is equipped with two serial ports, one ECP/EPP parallel printer port, one FDD connector, two IDE hard disk connectors and one PS/2 mouse port. Parallel Printer Floppy Disk Drive Connector Connector...

  • Page 61: Serial Ports

    The G486VPA system board supports IRQ4 for the primary serial port and IRQ3 for the secondary serial port. These serial ports use the following system I/O addresses:...

  • Page 62: Parallel Port

    The Primary and Secondary Serial Ports on the G486VPA System Board Parallel Port The G486VPA system board has a standard connector for interfacing your PC to a parallel printer. This port is compatible with both IBM AT printer ports and the new, high speed, bi-directional Extended Capabilities Port standard.
  • Page 63 Make sure the colored stripe on the ribbon cable aligns with pin 1 of Connector J3. Use a small nutdriver to mount the cable into a DB-25 cutout in the system chassis. The Parallel Printer Port on the G486VPA System Board Installation Overview u 2-53...
  • Page 64 PCI/ISA System Board Floppy Disk Drive Controller The G486VPA system board has a built-in floppy disk controller that supports two standard floppy disk drives. You can install any 360KB/720KB/1.2MB/1.44MB/ 2.88MB floppy disk drives. Connecting the Floppy Disk Cable The Floppy Disk Connector on the...
  • Page 65 Drive A. IDE Hard Disk Interface The G486VPA system board is equipped with one VL- Bus IDE connector and one ISA IDE connector that will interface four IDE (Integrated Drive Electronics) hard disk drives.
  • Page 66 PCI/ISA System Board Connecting the IDE Hard Disk Interface The IDE Hard Disk Connector on the G486VPA System Board Step 1 If you are connecting two hard drives, install the 40-pin connector of the IDE cable into the primary disk con- nector (J6).
  • Page 67 No changes are needed on the G486VPA system board when adding a second hard drive. We recommend that the IDE hard drives be from the same manufacturer.

  • Page 68: Ps/2 Mouse Port

    The PS/2 mouse port is a 6-pin connector on the system board. Attach the 6-pin mouse port cable, which came in the G486VPA box, to Connector CN3. Make sure the brown wire on the PS/2 mouse connector aligns with pin 1 of connector CN3. The other end of the wires are attached to the card-edge bracket that also holds the two serial port cables.

  • Page 69: Installing Expansion Cards

    G486VPA Installing Expansion Cards The G486VPA is equipped with three dedicated PCI and three dedicated ISA slots. One PCI slot and one ISA slot is shared. You can only install a card in one or the other of the shared slots at a time, you cannot install devices in both slots.
  • Page 70 PCI/ISA System Board Note: PCI3 and PCI4 are PCI Master slots and support Master Cards. PCI and PCI2 share the function of the third Master slot. If you insert a Master Card into one of these slots (PCI1 or PCI2), then the other slot can support Slave function only.

  • Page 71: Installing The System Board

    G486VPA Installing the System Board Before installing the system board into your system unit, you should prepare the tools you will need: You will need: • one medium size, flat-bladed screwdriver • one medium Phillips screwdriver Step 1 Unlock your system unit. Turn off the power and dis- connect all power cords and cables.
  • Page 72 PCI/ISA System Board Step 5 Remove the G486VPA from its original packing box. Be careful to avoid touching all connectors and pins on the board. Please refer to the handling instructions on pages 2-1 and 2-2 for proper handling techniques.

  • Page 73: Initial Setup Program

    G486VPA 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 DEL to enter Setup If the message disappears before you respond, restart your system or press the “Reset”...

  • Page 74: Award Bios Cmos Setup Utilities

    PCI/ISA System Board Award BIOS CMOS Setup Utility Press <Ctrl> <Alt> <Esc> or <Del> simultaneously 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>.
  • Page 75 You may use the “IDE HDD Auto Detection” from the main CMOS setup menu or you can set it manually. The G486VPA 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 76 PCI/ISA System Board If none of the pre-set types is appropriate for your drive, choose “User”, which is the user-definable type. To use this type, highlight either the drive you want to set: Primary Master, Primary Slave, Secondary Master or Secondary Slave.

  • Page 77: Bios Features Setup

    G486VPA All, But Disk/Key: The system will stop for any errors except a keyboard or disk error. Memory The lower right hand corner shows the base memory size, extended memory size, and the other memory size of your system. You cannot alter these items; your computer automatically detects and displays them.
  • Page 78 PCI/ISA System Board 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 79: Chipset Features Setup

    G486VPA Chipset Features Setup The G486VPA uses VIA chipset. The Chipset Features Setup allows you to modify some functions to optimize system performance. It also allows you to enable, dis- able or select the port address of the built-in serial ports, parallel port, floppy disk controller and hard disk con- troller.

  • Page 80: Power Management Setup

    PCI/ISA System Board Power Management Setup Use the arrow keys to highlight the “Power Management Setup” and press <Enter>. A screen similar to one below will appear Choosing “Enabled” in the Power Management option will allow you to set Doze Timer, Sleep Timer and Sleep Mode.

  • Page 81: Pci Configuration Setup

    Setup” and press <Enter>, a screen similar to the one below will appear. The G486VPA system board supports four PCI slots. Each slot may be assigned INT value if the card in- stalled in the slot requires an interrupt. Each INT may then be assigned an IRQ value.

  • Page 82: Load Bios Defaults

    PCI/ISA System Board 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. The BIOS default values provide the slowest performance for your system. You should use these values only if you are having hardware problems.

  • Page 83: Password Setting

    G486VPA 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” or “Setup” (see page 3-6). The main screen of the Setup utility allows you to set two types of password, Supervisor Password and User Password.

  • Page 84: User Password

    PCI/ISA System Board you will be prompted to enter the correct password again. Otherwise, enter a new password. To delete or disable the password function, simply press <Enter> instead of typing in a new password. Press the <Esc> key to return to the main menu. If you forget your password, you should clear any previously set password by setting Jumper JP2 pins 2 and 3 to On for approximately two minutes.

  • Page 85: Ide Hdd Auto Detection

    G486VPA IDE HDD Auto Detection This option detects the hard disk parameters for the hard disk drives installed in your system. Highlight this option and press <Enter>. A screen similar to the one below will appear. The screen displays the parameters detected and allows you to accept or reject the parameters.

  • Page 86: Save & Exit Setup

    PCI/ISA System Board Save & Exit Setup When all the changes have been made, highlight “Save & Exit Setup” and press <Enter>. The message below will appear: Save to CMOS and Exit (Y/N)? N Type “Y” and press <Enter>. The following message will appear: Reboot System (Y/N)? N Type “Y”...

  • Page 87: Ide Device Drivers

    (Secondary IDE Channel). The IDE device drivers should be installed under the “INSTALL.EXE” Utility. The G486VPA comes with one PCI IDE driver diskette. The “VT82C496G VLB Device Drivers” diskette in- cludes drivers for Microsoft Windows 3.1 and 3.11, Windows NT 3.1 and 3.5, OS/2 2.x and 3.0, Novell NetWare 3.11 and 4.0x, SCO UNIX 3.2.4.
  • Page 88 PCI/ISA System Board The Main Screen appears allowing you to choose one of the following options: 1. <F1>: Help - Press <F1> to get a help message 2. <Enter>: Continue - Pressing <Enter> lets you con- tinue the setup utility. 3.
  • Page 89 G486VPA Customized Installation When you press <F3>, these options appear on the screen: 1. <F1> - Install Windows Driver 2. <F2> - Install NetWare Driver 3. <Esc> - Quit The following is the description of the first two options. Installing the Windows 3.1, 3.11 Driver...
  • Page 90 PCI/ISA System Board If you have not turned on the 32bit disk access mode, the Utility will add new lines under CONFIG.SYS. The new lines are as follows: device=c:\windows\system\viaide.386 32BitDiskAccess=ON The Windows driver supports 32bit disk access mode which enables you to optimize your access speed. The Windows driver will be copied from the diskette to the destination directory.
  • Page 91 G486VPA Installing the NetWare 3.11, 4.0x Driver To install: Press <F2> to install the NetWare driver. The Utility will prompt you to enter the name of direc- tory for the NetWare driver you want to install. If you press <Enter>, the driver will be installed under the default directory.
  • Page 92 PCI/ISA System Board Enter the source floppy drive from which OS/2 drive is to be copied. Enter the destination disk drive. VIAIDE.ADD will be copied to the destination drive. The following line will be appended to CONF.SYS file: BASEDEV=VIAIDE.ADD Modify CONFIG.SYS file by moving the line: BASEDEV=VIAIDE.ADD in front of the name of the default OS/2 hard disk driver:...
  • Page 93 G486VPA To remove: 1. Remove the driver setting by deleting BASEDEV=VIAIDE.ADD in your C:\CONFIG.SYS file. 2. Reboot the system. Installing the SCO UNIX 3.2.4 Driver To install: You should prepare a blank diskette, 1.2MB (5.25") or 1.44MB (3.5"), to complete the installation. Follow these steps to convert the “VT82C496G VLB IDE...
  • Page 94 PCI/ISA System Board This procedure has provided you with an SCO UNIX custom installable diskette that you should use to install “VT82C496G VLB IDE Device Driver” to your SCO Unix using the custom command. Follow these steps: 1. Insert the SCO Unix custom installable diskette into a floppy drive.
  • Page 95 G486VPA 1. Edit the file /etc/conf/pack.d/vth1/space.c to change the define IRQ number 15 to 11 in the following way: #define WD1_0_VECT 11 2. Relink the kernel by typing: # /etc/conf/cf.d/link_unix 3. Use the kernel as the boot kernel. To remove: Follow the instructions about removing “VIA VESA/...
  • Page 96 PCI/ISA System Board The First Installation Method To install: After booting your system from Windows NT setup floppy drive, the “Welcome to Setup” screen will be displayed. Press <Enter> to continue the setup proce- dure. After pressing <Enter>, you are prompted to choose a setup method.
  • Page 97 G486VPA To remove: The first installation method cannot be removed. The Second Installation Method To install: To install the IDE Windows NT driver, follow these steps: 1. Under the Main window select the Windows NT Setup icon. 2. Choose the “Options” menu.
  • Page 98 PCI/ISA System Board 7. At the “Select SCSI Adapter Option” message box, click the “Install” button and then the “Continue” button to complete the installation. 8. Reboot the system. Note: IRQ15 is the default IRQ value for the secondary IDE channel.
  • Page 99 G486VPA 2. Choose the “Devices” menu. 3. Navigate the light bar to select the “vtdisk” Device and then click the “Startup” button. Note: At this stage you can apply another method that would allow you to disable the Windows NT driver. Instead of selecting “vtdisk”...

  • Page 100: Troubleshooting Checklist

    PCI/ISA System Board v Troubleshooting Checklist If you experience difficulty with the G486VPA 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 101 Lithium battery already used on your system board, 3V Lithium battery CR2032. One of the battery sockets presented below is supported by your G486VPA board. To remove the battery from the socket above, push the black button downward (1) and the battery to the right (2).

  • Page 102: Appendix A: Types Of Modules

    PCI/ISA System Board v Appendix A: Types of Modules The G486VPA system board allows you to populate memory with 256Kx36, 512Kx36, 1Mx36, 2Mx36, 4Mx36, 8Mx36 and 16Mx36 SIM modules. The follow- ing modules have been tested with this board. Most untested brands will work but a few may fail to do so.
  • Page 103 G486VPA For SIM 2Mx36 Modules Brand Chip Number M511000B For SIM 4Mx36 Modules Brand Chip Number M514100A-70S For SIM 8Mx36 Modules Brand Chip Number M514100AL-70K Appendix A u A-2...

  • Page 104: Appendix B: System Error Report

    PCI/ISA System Board 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 105 G486VPA CMOS CHECKSUM ERROR Checksum of CMOS is incorrect. This can indicate that CMOS has become corrupt. This error may have been caused by a weak battery. Check the battery and replace if necessary. DISK BOOT FAILURE, INSERT SYSTEM DISK AND PRESS ENTER No boot device was found.
  • Page 106 PCI/ISA System Board 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. Also, be sure the correct hard drive type is selected in Setup (refer to Appendix G). ERROR INITIALIZING HARD DISK CONTROLLER Cannot initialize controller.
  • Page 107 G486VPA MEMORY PARITY ERROR AT... Indicates a memory parity error at a specific location. You can use this location along with the memory map for your system to find and replace the bad memory chips. MEMORY SIZE HAS CHANGED SINCE LAST BOOT Memory has been added or removed since the last boot.
  • Page 108 PCI/ISA System Board PRESS F1 TO DISABLE NMI, F2 TO REBOOT When BIOS detects a Non-Maskable Interrupt condition during boot, this will allow NMI to be disabled and continue to boot. You can also reboot the system with the NMI enabled. RAM PARITY ERROR - CHECKING FOR SEGMENT Indicates a parity error in Random Access Memory.

  • Page 109: Appendix C: Memory & I/O Maps

    G486VPA 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 160K I/O...
  • Page 110 PCI/ISA 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 DMA Controller 2, 8237A-5...

  • Page 111: Appendix D: Pci I/O Pin Assignments

    G486VPA v Appendix D: PCI I/O Pin Assignments Component Side Solder Side -12V - 01 - TRST# +12V - 02 - Ground - 03 - - 04 - - 05 - - 06 - INTA# INTB# - 07 - INTC#...

  • Page 112: Appendix E: Isa I/O Pin Assignments

    PCI/ISA System Board v Appendix E: 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 - 08 -...

  • Page 113: Appendix F: Connector Pin Assignments

    G486VPA v Appendix F: Connector Pin Assignments BIOS J2 J1 VT82C505 VT82C406MV Bank 1 VT82C496G J14 J13 J12 J11 J10 JP40 Bank 0 Locations of Connectors on the System Board Appendix F u F-1...
  • Page 114 PCI/ISA System Board Connectors J1 and J2 Primary (COM1) and Secondary (COM2) Serial Ports Function DCD (Data Carrier Detect) RX (Receive Data) TX (Transmit Data) DTR (Data Terminal Ready) Ground (Signal Ground) DSR (Data Set Ready) RTS (Request to Send) CTS (Clear to Send) RI (Ring Indicator) Connector J3...
  • Page 115 G486VPA Function -Ack Busy Paper Empty Select -Autofd -Error -Init -Slctin Ground Ground Ground Ground Ground Ground Ground Connector J5 Floppy Disk Drive Connector Function Ground DENSEL Ground Reserved Ground Drate0 Ground Index Appendix F u F-3...
  • Page 116 PCI/ISA System Board Function Ground MTR0 Ground Ground Ground MTR1 Drate1 Ground Step Ground Write Data Ground Write Gate Ground Track 0 MSEN Wr Protect Ground Read Data Ground Head Select Ground Disk Change F-4 u Appendix F...
  • Page 117 G486VPA Connectors JP4 and JP6 Primary and Secondary IDE Hard Disk Drive Connectors Function -Reset Ground Ground Reserved Reserved Ground -IOW Ground -IOR Appendix F u F-5...
  • Page 118 PCI/ISA System Board Function Ground IO Channel Ready * BALE Reserved Ground IRQ14 IOCS16 Reserved HCS0 HCS1 Ground * Pin 27 is Reserved for Secondary IDE Channel Connectors J7 and J8 IDE1/IDE2 LED Function Signal LED Power F-6 u Appendix F...
  • Page 119 G486VPA Connector J9 Keylock Connector Function LED Signal Reserved Ground Keylock Signal Ground Connector J10 Speaker Connector Function Signal Reserved Ground Connector JP11 Reset Switch Connector Function Ground Reset Appendix F u F-7...
  • Page 120 PCI/ISA System Board Connector J12 Turbo/Green Button Connector Function Signal Connector J13 Turbo LED Connector Function Signal LED Power Connector J14 Green LED Connector Function Signal LED Power F-8 u Appendix F...
  • Page 121 G486VPA Connector JP3 External Battery Connector Function 3.6 Lithium Battery Connector JP40 Green 12V Fan Connector Function Green +12V Connector CN2 Keyboard Connector Function Keyboard Clock Keyboard Data Not Connected Ground Appendix F u F-9...
  • Page 122 PCI/ISA System Board Connector CN3 PS/2 Mouse Connector Function Mouse Data Reserved Ground Mouse Clock Reserved Connector PL1 Power Connector Function Power Good +12V -12V Ground Ground Ground Ground F-10 u Appendix F...

  • Page 123: Appendix G: Award Bios Hard Disk Table

    G486VPA v Appendix G: Award BIOS Hard Disk Table Type Size Cylinders Heads Sectors Write Land Example (MB) Precomp Zone Model TEAC SD510, MMI 112, 5412 Seagate ST225, ST4026 None Seagate ST125, Tandon TM262 None Tandon TM 703 None None...
  • Page 124 PCI/ISA System Board 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 1024...

  • Page 125: Appendix H: System Overview

    G486VPA Appendix H: System Overview DMA Channels DMA Controller 1 DMA Controller 2 Ch0-Reserved for User Ch4-Cascade for CTRL 1 Ch1-ECP * Ch5-Reserved for User Ch2-Diskette Ch6-Reserved for User Ch3-Reserved for User Ch7-Reserved for User * ECP DMA channel can be changed to Ch3 by using Jumper JP15 (see page 2-15 of the manual).

  • Page 126: System Interrupts

    PCI/ISA System Board System Interrupts Interrupt Controller 1 Interrupt Controller 2 IRQ0-Timer Output (Out 0) IRQ8-Realtime Clock INT IRQ1-Keyboard (Output Buffer Full) IRQ9-Software Redirected to INT 0AH (IRQ2) IRQ2-Interrupt from INTR2 IRQ10-Reserved IRQ3-Serial Port 2 IRQ11-Reserved IRQ4-Serial Port 1 IRQ12-PS/2 Mouse IRQ5-Parallel Port 2 or 3 (378h/278h) * IRQ13-Coprocessor IRQ6-Diskette Controller...
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  • Page 130 G486VP A Rev. A + System Board User’ s Manual - 26450623 -...
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