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 ho w we could imp rove the f orma t then p lease fill o ut
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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Figure 1
System Board Components
A Secondary processor connector
(SEC)
N System fan connector
B Primary processor connector (SEC) O Server monitor module connector
C Heatsink fan connectors P Narrow SCSI connector
D ATX power connector Q Wide SCSI connector
E Battery R DIMM Memory sockets (4)
F Main power connector S ISA expansion slots (2)
G Front panel connector, 16 pin T PCI expansion slots (4)
H AT front panel connector U Chassis intrusion header
I System fan connector V RJ-45 network controller
J Speaker W USB connector
K Diskette drive connector X Serial port B header (COM 2)
L IDE connectors Y I/O connections (VGA, Serial, etc.)
M Configuration jumper blocks Z PS/2 keyboard and Mouse ports
A B
C
D E
G
F
H
I
J
K
L
Pri.
Sec.
M
N
OPQR
S
T
U
V
W
X
Z
Y
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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.
• It allows the motherboard to be easily upgraded in the future without having to
resort to buying a whole new case. Simply change the I/O shield to match the
motherboard.
The I/O shield provides external access to PS/2 keyboard and mouse connectors as
well as one serial port, one parallel port, the VGA port and a RJ45 Local Area
Network (LAN) connection.
Figure 2
NOTE:
The mouse and keyboard can be plugged into either of the PS/2 connectors. Power to the
computer should be turned off before a keyboard or mouse is connected or disconnected.
NETWORK
SERIAL 1
PRINTER
MOUSE
KEYBOARD
VGA
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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 featur es:
Form factor
• ATX form factor of 12 x 13 inches.
Processor
• Dual Pentium II processor.
• 66 or 100 MHz Front Side Bus speed.
• 512 KB second-level cache on the substrate in the Single Edge Contact
(SEC) cartridge.
• 2 * Slot 1 connector’s.
Main memory
• Four 168-pin DIMM sockets.
• Support for up to 1 GB of 100MHz synchronous Double-ba nked SDRAM or
512 MB of 100MHz Synchronous Single-banked SDRAM.
• ECC 3.3V memory only.
Intel 440BX PCI/IDE Interface.
• Intel 82443BX PCI/AGP controller (PAC).
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Integrated PCI bus mastering controller.
• Intel 82371EB PCI/ISA IDE Xcelerator (PIIX4).
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Supports up to four IDE drives or devices. PIO mode 4 and DMA
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Transfer rates up to 22MB/sec.
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DMA controller.
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Two fast IDE interfaces.
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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.
• Up to 15 devices.
• Max data transfer 40MB/sec.
Integrated Network Interface.
• Intel 82558 PCI LAN adapter.
• For 10 or 100 Mbps TX fast Ethernet networks.
Integrated PCI Video.
• CL-GD5480 64-bit VGA.
• 1MB RAM video memory.
• Support for resolutions up to 1280 x 1024 and support for 16.7 M colors in
certain resolutions.
Expansion slots.
• Two ISA slot one shared.
• Four PCI slots one shared.
Additional features.
• Intel/Phoenix BIOS that supports Plug and Play, advanced IDE features, and
password security
• Plug and Play compatible.
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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. The processor’s implements MMX ™technology and maintains full backward
compatibility with the 8086, 80286, Intel386 ™, Intel486 ™, Pentium, and Pentium
Pro processors. The processor’s numeric coprocessor significantly increases the
speed of floating-point operations and complies with ANSI/IEEE standard 754-1985.
Microprocessor Packaging
The Pentium II processor is a Single Edge Contact (SEC) Cartridge that connects to
the motherboard through Slot 1, a 242-pin edge connector. The Pentium II
processor S.E.C. Cartridge consists of:
• Processor card including the processor core and the second-level cache:
burst pipelined synchronous static RAM (BSRAM)
• Thermal plate
• Back cover
When the Pentium II processor’s are mounted into the Slot 1 conne ctors, they are
secured by a retention mechanism attached to the motherboard.
Second Level Cache
The second-level cache is located on the substrate of the SEC cartridge. The cache
includes burst pipelined synchronous static RAM (BSRAM). There are four BSRAM
components totaling 512 KB in size. All supported onboard memory can be cached.
Processor Upgrades
The motherboard can be upgraded with Pentium II processors that run at higher
speeds. When upgrading the processor the USER must manually configure the
processor speed’s.
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Memory
Main Memory
The motherboard has four dual inline memory module (DIMM) sockets. Min imum
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.
The motherboard supports the following memory features:
• 168-pin DIMMS with gold-plated contacts.
• 100 MHz PC/100 SDRAM only.
• ECC (72-bit) 3.3 V memory only.
• Single or double-banked DIMMs in the following sizes:
Table 1
DIMM Size ECC Configuration
16 MB 2 Mbit x 72
32 MB 4 Mbit x 72
64 MB 8 Mbit x 72
128 MB 16 Mbit x 72
256 MB 32 Mbit x 72
Memory can be installed in one, two, three or four sockets. Memory size can vary
between the sockets.
SDRAM
Synchronous DRAM (SDRAM) improves memory performance through memory
access that is synchronous with the memory clock. This simplifies the timing design
and increases memory speed because all timing is dependent on the number of
memory clock cycles.
NOTE:
To function properly, SDRAM DIMMS must meet the PC/100, 100 MHz, and unbuffered
SDRAM specification for 72-bit SDRAM.
ECC Memory
Error checking and correcting (ECC) memory detects multiple-bit errors and corrects
single-bit errors.
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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. The PAC comes in a
492-pin BGA package and features:
• Processor interface control
Processor host bus speed of 100 MHz or 66 MHz
32-bit addressing
GTL+ compliant host bus
• Integrated DRAM c ontroller
Support for synchronous DRAM (SDRAM)
72-bit non-interleaved path-to-memory
Auto detection of memory type
Support for Mbit DRAM devices
Symmetrical and asymmetrical DRAM addressi ng
Support for 3.3 V DRAM only
• Fully-synchronous PCI bus interface
Compliance with PCI specification
PCI-to-DRAM access greater than 100 MB/sec
Support for five PCI bus masters.
Delayed transactions
PCI parity checking and generation support
• Data Buffering
Host-to-DRAM, PCI-to-DRAM, and A.G.P.-to-DRAM read buffers
Write-combining for host-to-PCI burst writes
Supports concurrent host, PCI, and A.G.P. transactions to main memory
• Support for system management mode (SMM)
Intel 82371EB PCI ISA IDE controller (PIIX4)
The PIIX4 is a multifunction PCI device implementing the PCI-to-ISA Bridge, and PCI
IDE functionality. The PIIX4 comes in a 324-pin MBGA package that features:
• Multifunction PCI-to-ISA bridge
Support for the PCI bus at 33 MHz
Compliance with PCI specification
Full ISA bus support
• Integrated dual-channel enhanced IDE interface
Support for up to four IDE devices
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PIO Mode 4 transfers at up to 16 MB/sec
Support for Ultra DMA/33 synchronous DMA mode transfers up to 33
MB/sec
Bus master mode with an 8 x 32-bit buffer for bus master PCI IDE burst
transfers
• Enhanced DMA controller
Two 8237-based DMA controllers
Support for PCI DMA with three PC/PCI channels and distributed DMA
protocols
• Interrupt controller based on 82C59
Support for 15 interrupts
Programmable for edge/level sensitivity
• 16-bit counters/timers based on 82C54
• Real-time Clock
256-Byte battery-backed CMOS SRAM
Includes date alarm
IDE Support
The motherboard has two independent bus-mastering PCI IDE interfaces. These
interfaces support PIO Mode 3, PIO Mode 4, ATAPI devices (e.g., CD-ROM), and
DMA mode transfers. The BIOS supports logical block addressing (LBA) and
cylinder head sector (CHS) translation modes. The BIOS automatically detects the
IDE device transfer rate and translation mode.
Programmed I/O operations usually require a substantial amount of processor
bandwidth. However, in multitasking operating systems, the bandwidth freed by bus
mastering IDE can be devoted to other tasks while disk transfers are occurring.
LS-120 Support
LS-120 MB Diskette technology enables you to store 120MB of data on a single, 3.5”
removable diskette. LS-120 technology is backward (both read and write)
compatible with 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.
NOTE
:
If you connect an LS-120 drive to an IDE connector and configure it as the “A” drive and
configure a standard 3.5” floppy as “B” drive, the standard floppy must be connected to the
floppy drive cable’s “A” connector (the connector at the end of the cable).
The BIOS setup utility can be configured to boot firstly from either the LS120 or standard 3½
“ floppy drive.
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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.
The time, date, and CMOS values can be specified in the Setup program. The
CMOS values can be returned to their defaults by using the Setup program.
An external coin-cell battery powers the real-time clock and CMOS memory. When
the computer is not plugged into a wall socket, the battery has an estimated life of
three years. When the computer is plugged in, the 3.3-V standby current from the
power supply extends the life of the battery. The clock is accurate to ± 13
minutes/year at 25 ºC with 3.3 V applied.
Super I/O Controller
The PC87309 Super I/O Controller from National Semiconductor is an ISA Plug and
Play compatible, multifunction I/O device that provides the following features:
• Serial ports
Two 16450/16550A-software compatible UARTs
Internal send/receive 16-byte FIFO buffer
Four internal 8-bit DMA options for the UART with SIR support (USI)
• Multimode bidirectional par al lel por t
Standard mode: IBM and Centronics compatible
Enhanced parallel port (EPP) mode with BIOS and driver support
High-speed extended capabilities port (ECP) mode
• Floppy disk controller
DP8473 and N82077 compatible
16-byte FIFO
PS/2 diagnostic-register support
High-performance digital data separator (DDS)
PC-AT and PS/2 drive-mode support
• Keyboard and mouse controller
Industry standard 8042A compatible
General-purpose microcontroller
8-bit internal data bus
By default, the I/O controller interfaces are automatically configured during boot up.
The I/O controller can also be manually configured in the Setup program
.
Serial Ports
Two 9-pin D-Sub serial port connectors, one is located on the back panel and the
other connected to a 10pin header and is relocatable.
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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)
• Extended Parallel Port (EPP)
• Enhanced Capabilities Port (ECP)
Floppy Controller
In the Setup program, the floppy interface can be configured for the following floppy
drive capacities and sizes:
• 360 KB, 5.25-inch
• 1.2 MB, 5.25-inch
• 720 KB, 3.5-inch
• 1.2 MB, 3.5-inch (driver required)
• 1.25/1.44 MB, 3.5-inch
• 2.88 MB, 3.5-inch
Keyboard and Mouse Interface
PS/2 keyboard and mouse connectors are located on the back panel. The 5 V lines
to these connectors are protected with a PolySwitch circuit that, like a self-healing
fuse, re-establishes the connection after an over-current condition is removed.
The keyboard controller contains the AMI Megakey keyboard and mouse controller
code, which provides the keyboard and mouse control functions, and supports
password protection for power on/reset. A power on/reset password can be
specified in Setup.
The keyboard controller also supports the hot-key sequence <Ctrl><Alt><Del> for a
software reset. This key sequence resets the computer’s software by jumping to the
beginning of the BIOS code and running the Power-On Self Test (POST).
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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.
DMI (Desktop Management Interface)
DMI is a new PC Management system designed for networked PC’s. It allows
connected computers, running the appropriate software to control functions on
designated computers on the network. This motherboard adheres to Levels 0 & 1 of
DMI, which are outlined below.
Table 2
LEVEL 0
Operating System embedded
support functions
BIOS has embedded support for Windows
95 and NT operating systems
LEVEL 1
Full Level 0 Management Incorporates Management Level 0
ECC on Memory Memory has Error correcting technology
DMTF Compliant Software The system has an option to be supplied
with LANDesk® Client Manager 3.0
DMI Compatible BIOS Lowers the cost of ownership through
simplified system manageability
Chassis Security Header (reserved for future use)
The management extension hardware supports an optional chassis security feature
that detects if the chassis is opened while the computer is powered on. The security
feature uses a mechanical switch on the chassis that is attached to an optional 1 x 3pin header (J4A1). The mechanical switch is closed for normal computer operation.
Server Management
All server management functionality formerly distributed between 3 controllers is now
concentrated in the Baseboard Management Controller (BMC). The primary
functions of the BMC it to autonomously monitor system platform management
events, and log their occurrence in the non-volatile SEL. These include events such
as fan failure, chassis intrusion and over-temperature. The BMC provides an ISA
host interface to SDRR information so software running on the server ca n poll and
retrieve the current status of the platform. A shared register interface is defined for
this purpose.
SEL contents can be retrieved after system failure, for analysis by using system
management tools such as Intel LANDesk® Server Manager. Using the built in EMP
feature or an Emergency Management Card such as the Intel LANDesk® SMM card,
the information in the SEL can be obtained from a remote location via a LAN or
telephone line.
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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-topoint RS-232 connection or an external modem. EMP provides access to these
basic management features:
• System Power up
• System power down (Not available when in restricted mode)
• System reset (Not available when in restricted mode)
• Access to the System Event Log, FRU and Sensor Data Records
• Access to BIOS console Redirection
• Password protection
The EMP is intended for use only in a secure environment. A simple password can
be configured to provide a rudimentary level of security.
The COM2 port on the N440BX can be used for three different purposes:
• Normal serial communications port
• Console Redirection
• EMP
When the port is being used fo r EMP purposes a nd the Acce ss Mode ha s been set
to always active in the BIOS, then it is unavailable for any other use.
PCI Auto Configuration
The PCI auto-configuration utility works in conjunction with the Set-up program to
support PCI add-in boards in the system. When you turn on the system power after
installing a PCI board, the BIOS automatically configures interrupts, DMA channels,
I/O space, and so on. The PCI auto-configuration program complies with version 2.1
of the PCI BIOS specification.
IDE Auto Configuration
If you install an IDE drive in the system, the IDE auto-configuration utility
automatically detects and configures the drive for operation in the system. This
utility eliminates the need to enter the Set-up program after you install an IDE drive.
Expansion Slots
The system has two 16-bit ISA/AT-compatible and four PCI-compatible expansion
slots. One ISA and one PCI slot are shared so this provides system expansion of up
to five add-in cards.
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