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Viglen N440BX Instruction Manual

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Introduction
This manual describes the Viglen N440BX motherboard inside your computer. The
motherboard is the most important part of your computer. It contains all of the CPU,
memory and graphics circuitry that makes the computer work.
The motherboard contains the very latest CPU design, the Intel Pentium II
processor, which includes Intel's MMX technology. MMX technology adds a total of
57 new instructions to the CPU, all of which are designed to vastly improve both
multimedia and communications on your PC. The combination of the Intel Pentium II
processor, MMX technology and Viglen expertise make this a formidable computer.
This manual contains technical information about the Viglen N440BX motherboard
and other hardware components inside your computer. If you are new to computers
we recommend that you read the user guide first.
If you are an experienced
computer user this manual should provide all the information you will need to
perform simple upgrades and maintenance.
We hope that this manual is both readable and informative.
If you have any
comments or suggestions about how we could improve the format then please fill out
the form at the back of the manual and send it to us.
Above all we hope that you enjoy using your Viglen computer.
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  • Page 1 Introduction This manual describes the Viglen N440BX motherboard inside your computer. The motherboard is the most important part of your computer. It contains all of the CPU, memory and graphics circuitry that makes the computer work. The motherboard contains the very latest CPU design, the Intel Pentium II processor, which includes Intel’s MMX technology.
  • Page 2 Pri. Sec. Figure 1 System Board Components Secondary processor connector System fan connector (SEC) Primary processor connector (SEC) Server monitor module connector Heatsink fan connectors Narrow SCSI connector ATX power connector Wide SCSI connector Battery DIMM Memory sockets (4) Main power connector ISA expansion slots (2) Front panel connector, 16 pin PCI expansion slots (4)

  • Page 3: Back Panel Connectors

    Back Panel Connectors The motherboard external IO connectors are attached to a metallic I/O shield. This shield serves several purposes: • It protects the sensitive motherboard from any external EMC problems. • It stops the computer from interfering with other electrical devices. •...

  • Page 4: Feature Summary

    Feature Summary The N440BX motherboard supports two Intel Pentium ® II processors with second – level cache integrated in a Single Edge Contact (SEC) cartridge operating at 233, 266, 300, 333, 350, 400MHz and beyond. The motherboard features: Form factor •...
  • Page 5 I/O features. • The 87309 devices supports two FIFO serial ports, one Multi-mode Parallel port, floppy disk drive, PS/2 keyboard and mouse and an integrated Real Time Clock (RTC). Symbios SYM53C876 controller Interface. • Support for 8 or 16 bit fast SCSI. •...

  • Page 6: Microprocessor Packaging

    Microprocessor The motherboard supports dual Pentium II processor’s. The processor’s VID pins automatically program the voltage regulator on the motherboard to the required processor voltage. The motherboard currently supports processor’s that run internally at 233, 266, 300, 333, 350 and 400MHz all with 512 KB second-level cache.
  • Page 7 Memory Main Memory The motherboard has four dual inline memory module (DIMM) sockets. Minimum memory size is 16 MB; maximum memory size is 512 MB with 1 GB being available in the future with the use of double-banked DIMMs. The BIOS automatically detects memory type, size, and speed.
  • Page 8 Chipset The Intel 440BX chipset is the latest generation of Intel’s PCI set and is designed for the Pentium II processor. It consists of the Intel 82443BX PCI/A.G.P. controller (PAC) and the Intel 82371EB PCI/ISA/IDE controller (PIIX4) bridge chip. Intel 82443BX PCI/A.G.P. Controller (PAC) The PAC provides bus-control signals, address paths, and data paths for transfers between the processor’s host bus, PCI bus, and main memory.

  • Page 9: Ide Support

    1.44MB and 720KB DOS-formatted diskette and is supported by the Windows NT operating system. The N440BX board allows connection of an LS-120 compatible drive and a standard 3½” floppy drive. The LS-120 drive can be configured as a boot device before a floppy drive, if selected in the BIOS setup utility.

  • Page 10: Real-Time Clock, Cmos Sram, And Battery

    Real-time Clock, CMOS SRAM, and Battery The real-time clock is compatible with DS1287 and MC146818 components. The clock provides a time-of-day clock and a multicentury calendar with alarm features and century rollover. The real-time clock supports 256 bytes of battery-backed CMOS SRAM in two banks that are reserved for BIOS use.
  • Page 11 Parallel Port The connector for the multimode bidirectional parallel port is a 25-pin D-Sub connector located on the back panel. In the Setup program, the parallel port can be configured for the following: • Compatible (standard mode) • Bidirectional (PS/2 compatible) •...

  • Page 12: System Bios

    System BIOS The system BIOS, from Phoenix Technology, provides ISA and PCI compatibility. The BIOS is contained in a flash memory device on the system board. The BIOS provides the power-on self-test (POST), the system Set-up program, a PCI and IDE auto-configuration utility, and BIOS recovery code.

  • Page 13: Pci Auto Configuration

    Emergency Management Port (EMP) The COM2 serial port on your N440BX server can be configured for use as an Emergency Management Port. EMP provides a level of system management during power-down, pre-boot and post-boot situations. It can be achieved via a point-to- point RS-232 connection or an external modem.
  • Page 14 The N440BX motherboard is capable of accepting 233, 266, 300, 333, 350MHz, and 400MHz, Pentium II CPU's. RAM can be upgraded to a maximum of 1GB using double-banked ECC SDRAM DIMMs. WARNING Unplug the system before carrying out the procedures described in this chapter.
  • Page 15 Make sure you are earthed and free of static charge before you open the computer case. If you are unsure about upgrading your computer, return it to Viglen so a qualified engineer can perform the upgrade. STEPS TO TAKE TO PREVENT STATIC DISCHARGE: 1.

  • Page 16: Overview Of Jumper Settings

    Overview of Jumper Settings The system motherboard inside your computer contains a block of twenty-one pins and seven plastic jumpers. Different pins and jumper configurations make it possible to change how the computer functions. This section of the manual should give you all the information you will require making any changes.

  • Page 17: Jumper Settings

    Jumper Settings Each set of 3 pins requires one jumper, and has two options. The following figure shows the position of the jumpers on the motherboard, and also the standard position of the jumpers (two white pins). BMC Forced Update mode Chassis Intrusion Detection J3J2...
  • Page 18 Table 3 Configuration Jumper Settings Function Jumper Configuration J2J1 (Default options in bold) Clear CMOS 1-2 Preserve contents of NVRAM. Replace contents of NVRAM with default settings. Clear system Maintain current system password. password. Clear password Recover from 9-10 System boots using BIOS stored in the flash corrupted memory.

  • Page 19: Motherboard Connectors

    Motherboard Connectors There are connectors on the motherboard for Floppy drives, IDE devices, Fans, Power, Serial Port’s, SCSI, and Front Panel Connectors. The location and/or details of these connections are shown below. Main power ATX power Floppy Drive C P U F a n connector Connector COM port B...

  • Page 20: Front Panel Connectors

    Front Panel Connectors The following are all connectors situated along the front edge of the motherboard. They are often connected to buttons and LED’s situated on the front panel. Reset Pwr LED S P K HD LED Pwr On Front Panel I/O Connector Header Fig 4.1 Front panel connectors.
  • Page 21 The design of the N440BX computer makes it a simple job to replace or upgrade the processors. To do so please refer to figures 1 and 5 and follow the instructions below.
  • Page 22 Pentium II shown without Heatsink fitted. Figure 5...
  • Page 23 Installing & Removing Dual In-line Memory Modules DIMMs Installing Memory You can install from 16MB to 1GB of memory in the motherboard DIMM sockets. The board has DIMM sockets arranged as banks 1, 2, 3, and 4. The motherboard supports the following memory features: •...
  • Page 24 To install DIMMs, follow these steps: Pri. Sec. Ensure DIMM Notches Locations match exactly with DIMM scoket Keys Notches Figure 6.1 1. Observe the precautions in “Before You Begin” Turn off all peripheral devices connected to the computer. Turn off the computer. 2.

  • Page 25: Removing Memory

    5. Position the DIMM above the socket. Align the two small notches in the bottom edge of the DIMM with the keys in the socket. 6. Insert the bottom edge of the DIMM into the socket. 7. When the DIMM is seated, push down on the top edge of the DIMM until the retaining clips at the ends of the socket snap into place.

  • Page 26: Replacing The Clock/Cmos Ram Battery

    CAUTION! Danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by Viglen. Discard used batteries according to manufacturer’s instructions. The battery is listed as board component ‘E’ on the diagram on page 2.
  • Page 27 The first part of this chapter helps you identify and solve problems that might occur when the system is in use. The second part lists error code messages that might be displayed. Viglen Technical Support can be reached in the following ways: Telephone: 0181 758 7050 Fax:...

  • Page 28: Troubleshooting Procedure

    Troubleshooting Procedure This section provides a step-by-step troubleshooting procedure to identify a problem and locate its source. CAUTION! 1. Turn off the system and any peripheral devices before you disconnect peripheral cables from the system. Otherwise, you can permanently damage the system or the peripheral devices.

  • Page 29: Problems And Suggestions

    Problems and Suggestions Table 5 What happens What to do Application Make sure all cables are installed correctly. software Verify that the system board jumpers are set problems properly. Verify that your system hardware configuration is set correctly. In Setup, check the values against the system settings you recorded previously.
  • Page 30 Table 5 continued What happens What to do Characters do not Make sure the video display is plugged in and appear on screen turned on. Check that the brightness and contrast controls are properly adjusted. Check that the video signal cable is properly installed.
  • Page 31 Table 5 continued What happens What to do Setup, can't If you can't enter Setup to make changes, clear enter CMOS RAM to the default values and reconfigure the system in Setup. System halts This indicates a fatal system error that requires before immediate service attention.

  • Page 32: Error And Information Messages

    Error and Information Messages The rest of this chapter describes beep codes, and error messages that you might see or hear when you start up the system: BIOS Error Messages Table 6 BIOS Error Messages Error Message Explanation Diskette drive A error or Drive A: or B: is present but fails the POST Diskette drive B error diskette tests.
  • Page 33 Table 6 BIOS Error Messages (continued) Error Message Explanation Parity Check 1 Parity error found in the system bus. BIOS attempts to locate the address and display it on the screen. If it cannot locate the address, it displays ????. Parity Check 2 Parity error found in the I/O bus.

  • Page 34: Bios Beep Codes

    BIOS Beep Codes If a hardware problem occurs the computer may emit a number of beeps from the speaker. These are known as beep codes. The pitch and duration of the beep codes may vary but there will always be a set number of beeps. These beeps stem from the BIOS’s initial check on the system and will normally occur in the first few seconds of power on.

  • Page 35: What Is The Bios

    RAM (also known as the CMOS RAM) and provides a special Setup program to change this information. The BIOS in your Viglen computer is guaranteed to be fully compatible with the IBM BIOS. Phoenix Technology Ltd., an industrial leader in the field of BIOS software, has written it.

  • Page 36: Overview Of Bios Features

    INTEL/PHOENIX BIOS Overview of BIOS Features Introduction The motherboard uses an Intel/Phoenix BIOS, which is stored in flash memory and can be upgraded using a disk-based program. In addition to the BIOS, the flash memory contains the Setup program, Power-On Self Test (POST), the PCI auto- configuration utility, and is Windows 95-ready Plug and Play.
  • Page 37 Plug and Play: PCI Auto-configuration The BIOS automatically configures PCI devices and Plug and Play devices. PCI devices may be onboard or add-in cards. Plug and Play devices are ISA add-in cards built to meet the Plug and Play specification. Auto-configuration lets a user insert or remove PCI or Plug and Play cards without having to configure the system.
  • Page 38 ISA Plug and Play If Plug and Play operating system is selected in Setup, the BIOS auto-configures only ISA Plug and Play cards that are required for booting (IPL devices). If Plug and Play operating system is not selected in Setup, the BIOS auto-configures all Plug and Play ISA cards.
  • Page 39 Recovering BIOS Data Some types of failure can destroy the BIOS. For example, the data can be lost if a power outage occurs while the BIOS is being updated in flash memory. The BIOS can be recovered from a diskette with recovery files using the BIOS recovery Jumper See Recovering the BIOS later in the chapter.

  • Page 40: Configuring The Motherboard

    Configuring the Motherboard Before You Begin CAUTION! • Always follow the steps in each procedure in the correct order. • Set up a log to record information about your computer, such as model, serial numbers, installed options, and configuration information. •...

  • Page 41: Changing Jumper Settings

    Changing Jumper Settings Below is a list of actions to take to change the jumper setting for the Clear CMOS option. Most of the actions below refer to all of the jumpers that you might wish to change. Any differences for the changing of each jumper are listed in a table. Clearing the CMOS NOTE : Clearing the CMOS will load the Manufacture default settings in to the NVRAM.
  • Page 42 9. On the header (J2J1), move the first jumper back to pins 1-2 to restore normal operation as shown below. CMOS Clear Jumper J2J1 (1-3) 1 2 3 Figure 8.2 10. Replace the cover and turn on the computer. For all the below actions after the operation is complete replace the jumper back to its original position unless otherwise stated.

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