Award NLX BX4 User manual

CHAPTER 1 INTRODUCTION
1-1
Chapter 1
INTRODUCTION
The NLX BX4 mainboard is a high-performance personal computer
mainboard based on Intel®Pentium®II processor. It combines Intel®740
graphics accelerator, YAMAHA®YMF740 enhanced audio, and Intel®82558
10/100M Ethernet . The Pentium®II processor supports MMXTM (Multime-
dia Extension) technology.
The mainboard uses the highly integrated Intel®82443BX chipset to support
the PCI/ISA and Green standards, and to provide the Host/AGP bridge. The
Intel®82371EB chipset integrates all system control functions such as ACPI
(Advanced Configuration and Power Interface). The ACPI provides more
Energy Saving Features for the OSPM(OS Direct Power Management)
function. The Intel®82371EB chipset also improves the IDE transfer rate by
supporting Ultra DMA/33 IDE that transfers data at the rate of 33MB/s.
The mainboard also supports the System Hardware Monitor Controller. This
function includes: CPU /power supply/chassis fan revolution detect, CPU/
system voltage monitor, system temperature monitor, and chassis intrusion
detect.

CHAPTER 1 INTRODUCTION
1.1 Mainboard Features
CPU
lSlot 1 for Pentium®II processor.
lSupports233MHz,266MHz,300MHz,333MHz,350MHz, 400MHz,and
faster.
lCore/Busratiosare x2,x2.5,x3,x3.5,x4,x4.5,x5,x5.5,x6andhigher.
SwitchingVoltage Regulator
lOn-board switching mode DC-DC Step Down Regulator.
lConforms to Intel®VRM ver 8.2 specifications.
lOver-Voltage and Over-Current protection.
Chipset
lIntel®82440BXAGPchipset.
ClockGenerator
l66.6MHz and 100MHz clocks are supported.
MainMemory
lSupports six memory banks using three 168-pin unbuffered DIMM
sockets.
lSupportsamaximum memory size of768MB.
lSupportsECC(1-bit Error Code Correct) function.
lSupports only 3.3v SDRAM DIMM.
VGA
lIntel®740 Graphics Accelerator
- Running on AGP BUS
- Onboard 8MB SDRAM
- 3D Acceleration.
1-2

CHAPTER 1 INTRODUCTION
1-3
SystemHardwareMonitor
lThis can be used with Intel®LDCM to monitor system voltage, system
temperature & fan rotation speed.
lThis can also be used to monitor overall system status over the network.
lSystem temperature sensor: (TOP Tech)
- detect Pentium®II processor’s temperature.
lSystem voltage monitor:
- monitorCPU core voltage, CPU interface voltage, 3.3v,+12v, +5v
lFan speed monitor:
- monitor chassis fan, power fan & CPU cooling fan speed.
PowerManagementFeatures
lDoze/Standby/Suspend mode.
lSystem management mode compliant.
lSupport APM 1.2.
lMeet ACPI spec.
lPC97compliant.
Sound
lYAMAHA®YMF740 AudioController.
lSoundBlaster PRO Compatible.
lSupport Plug and Play:
- stereo 16-bit A/D
- stereo 16-bit D/A
lStereo enhancement support.
lAdvanced power management.
lMaximum32voice xG capital wavetable.
lSynthesizer including GM compatible.
Network

CHAPTER 1 INTRODUCTION
1-4
lIntel®8255810/100MEthernet.
lWFW baseline & NET PC specs compliant.
lACPI
lMagic packet filtering to wake-up LAN.
lARP&FLEXIBLEframefiltering.
lSoftware drivers are backwards compatible.
Note: Requires an ATX power supply with 720mA 5VSB (5v Stand by).
RearMainboardConnectors
lPS/2®keyboard interface and PS/2®mouse interface.
lOne COM port connector.
lOne VGA port connector.
lOneprinter port with SPP/EPP/ECP function.
lOne USB connector.
lOne MIDI/Joystick connector.
lOneRJ-45 LAN connector.
lAudio conectors: Speaker/Line-In/Mic.
Dimension
lNLXFormFactor: 20.7cm(L)x25.4cm(W)x4layersPCB.
OtherFeatures
lBulkErase Flash ROM.
lSupports DMI.
lSystem Wake-up by modem.
lSystem Wake-up by alarm.
lSoft-power off. (Windows®95)
lPolyfuse function.
- this function works when the electric current is larger than 2A. It will
become an open circuit to protect your mainboard. Turn the power off for
1-3 secs for polyfuse to recover.
lLANwake-up.
lRestore AC power loss status.

CHAPTER 1 INTRODUCTION
1.2 Mainboard Layout
1-5
MS-6121
SLOT 1
DIMM 3
DIMM 2
DIMM 1
T:mouse
B:
keyboard Port
USB
T: LPT
B: COM A
VGA
Joystick/
MIDI LAN
RJ-45 MIC L-IN SPKR
BATT
BIOS
FW82443BX
CPUFAN1
Intel®
82558
10/100M
Ethernet
YAMAHA
YMF740
+
Intel®740
Graphics
Accelerator
COMB
PIIX4E
JSOR1
JBAT1
JP2
J4
SW1
JMIC1 J2
JP5

CHAPTER 2 HARDWARE INSTALLATION
2-1
Chapter 2
HARDWARE INSTALLATION
2.1 Central Processing Unit: CPU
The mainboardoperates with Intel®Pentium®IIprocessorwith MMXTM
technology. The mainboard uses a CPU Slot called Slot 1 for easy CPU
installation and a DIP switch (SW1) to set the proper speed for the CPU.
The CPU should always have a Heat Sink and a cooling fan attached to
prevent overheating.

CHAPTER 2 HARDWARE INSTALLATION
2-2
2.1-1 CPU Installation Procedures
A. OEM Pentium®II processor Installation Procedure
Required Things:
Pentium®IIprocessor-Processor.
*RetentionMechanism(RM)- PlasticGuide that holds the S.E.C. Catridge
in the Slot 1 connector.
*RetentionMechanismAttachMount(RMAM) - Bolt/Bridgeassemblies
inserted up through the bottom of the
motherboard. RM secures to RMAM ( 2
RMAM required per RM ).
*Heat Sink SupportBase (HSSBASE) - Plastic support bar mounted to
the mainboard under the ATX heatsink.
(One leg is always bigger than the other one)
Processor
Lock
Retention
Mechanism
Pentium®II
Processor
Heat Sink
W/Fan
Notch Hole
Heat Sink
Support Base Heat Sink
Support Pin
Heat Sink
Support
Top Bar
Different kinds of Pentium®II processor that is currently used: the OEM
version, the Boxed version, and CeleronTM. OEM Pentium®II Processor has
no Heat Sink, Fan and Heat Sink Support, the Boxed Pentium®II Processor
is provided with Heat Sink w/ fan and Heat Sink Support, while the
CeleronTM processor is a plain processor card without cover or heatsink..

CHAPTER 2 HARDWARE INSTALLATION
2-3
*HeatSink Support Pin (HSSPIN) - Plastic pins inserted through the
HSSBASE to secure it to the mainboard (2
required per Assembly).
*Heat Sink Support Top Bar (HSSTOP) - Plastic bar that clips onto the
HSSBASE through the fins on the ATX
heatsink.
**Heat Sink w/ fan - Heat Sink that can be attached to the Pentium®II
processorwith metal clip.
Note:* Provided by MSI mainboard.
** Provided by Special request.
RM
HSSPIN
HSSTOP
HSSBASE
RMAM

CHAPTER 2 HARDWARE INSTALLATION
2-4
SLOT1
Retention
Mechanism
êê
Key
êê
Retention
Mechanism
Attach Mount
Notch
Key
Step 1: Insert the Retention Mechanism Attach Mount at the bottom
of the mainboard.
Step 2: Install the Retention Mechanism.
Look for the key on Slot 1, and match it with the Notch Key on the
Retention Mechanism for proper direction. Then, attach the
Retention Mechanism to the Retention Mechanism Attach Mount.
Use a Screwdriver to secure the Retention Mechanism.

CHAPTER 2 HARDWARE INSTALLATION
2-5
Step 3: Install the Heat Sink Support Base.
Look for the Two holes across Slot 1, and match it with the Two legs
of the Heat Sink Support Base for the proper direction. Take note
that one hole/leg is bigger than the other. The Four top pins of the
Heat Sink Support Base should also be oriented towards Slot 1.
Push the Heat Sink Support Base onto the mainboard, until you hear
a click sound. Check for a perfect fit.
Step 4: Install the Heat Sink Support Pin.
Push the Heat Sink Support Pins onto the two holes of the Heat Sink
Support Base. Check for a perfect fit. These pins are used to secure
the Heat Sink Support Base.
Heat Sink
Support Base
Heat Sink
Support Pin
Leg
pins