MSI MICRO ATX BX11 User manual

CHAPTER 1 INTRODUCTION
1-1
The MICRO ATX BX11 mainboard is a high-performance personal computer
mainboard based on the Intel®Pentium®II processor. This mainboard
features the leading edge Creative®ES1371/ES1373(reserved)PCItechnol-
ogy in audio. The Intel®Pentium®II processor supports MMXTM (Multime-
dia Extension) technology.
The mainboard uses the highly integrated Intel®82443BX AGP 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
of33MB/s.
The mainboard also supports the System Hardware Monitor Controller. Its
functions include: CPU /power supply/chassis fan revolution detect, CPU/
system voltage monitor, system temperature monitor, and chassis intrusion
detect(optional).
Chapter 1
INTRODUCTION

CHAPTER 1 INTRODUCTION
1-2
1.1 Mainboard Features
CPU
lSlot 1 for Intel®Pentium®II/CeleronTM processor.
lSupports233MHz,266MHz,300MHz,333MHz,350MHz,400MHz,
450MHz,andfaster.
Chipset
lIntel®82443BX/PIIX4Echipset.
ClockGenerator
l66 and 100 MHz clocks are supported
MainMemory
lSupports four memory banks using two 168-pin unbuffered DIMM.
lSupportsa maximum memorysizeof 256MB (8Mx8) or512MB(16M x 4)
registered DIMM only.
lSupportsECC(1-bit Error Code Correct) function.
lSupports 3.3v SDRAM DIMM.
Slots
lOne AGP slot.
lThree 32-bit Master PCI Bus slots and one 16-bit ISA bus slots wherein
one shared slot can be used as ISA or PCI.
lSupports 3.3v/5v PCI bus Interface.
On-BoardIDE
lAn IDE controller on the Intel®PIIX4E PCI Chipset provides IDE HDD/
CD-ROM with PIO, Bus Master and Ultra DMA/33 operation modes.
lCan connect up to four IDE devices.

CHAPTER 1 INTRODUCTION
1-3
On-BoardPeripherals
lOn-Board Peripherals include:
- 1 floppy port supports 2 FDD with 360K, 720K, 1.2M, 1.44M and
2.88Mbytes.
- 2 USB ports
-2 serial port (COM 1) and (COM 2)
- 1 parallel port supports SPP/EPP/ECP mode
- 1 IrDA connector for SIR.
Sound
lCreative®ES1371/ES1373(reserved)
-Runningon PCI BUS.
-64Voice andAC3Capable(ES1373 only)
- Support Direct Sound and Direct Sound 3D
-AC97’ Compliant
I/OChip
lWinbond®multi super I/O W83977TF
- 2M bps fast tape drive, IRQ sharing
- Device Power Management
-Realtime clock (256 bytes RAM)
- 8042-based keyboard controller (support PS/2 mouse)
BIOS
lThe mainboard BIOS provides “Plug & Play” BIOS which detects the
peripheral devices and expansion cards of the board automatically.
lThe mainboard provides a Desktop Management Interface(DMI) function
which records your mainboard specifications.
lACPI(Advanced Configuration and Power Interface) feature.
Dimension
lMICROATX Form Factor : 24.4cm(L) x19.2cm(W)x 4 layers PCB

CHAPTER 1 INTRODUCTION
1-4
Mounting
l6 mounting holes.
SystemHardwareMonitor
lCPU/Power Supply/Chassis Fan Revolution Detect
lCPU Fan Control (the fan will automatically stop when the system enters
suspend mode)
lSystem Voltage Detect
lCPU Overheat Warning.
lDisplay Actual Current Voltage
OtherFeatures
lKeyboard Password Wake-Up (reserved)
lLAN Wake-Up
lInternal/External Modem Wake-Up

CHAPTER 1 INTRODUCTION
1-5
1.2 Mainboard Layout
MS-6156 MICRO ATX BX11 Mainboard
PCI SLOT 3
PCI SLOT 2
PCI SLOT 1
ISA SLOT 1
ATX
Power Supply
FW82443BX
SLOT 1
DIMM 2
Top: mouse
Bottom:
keyboard
Top:Port1
USB
DIMM 1
IDE2
Bottom:
Port2
IDE1
FDD
FW82371EB
JMDM1
Creative
ES1371
JP1
SYSFAN
JFP1
JGS1
JGL1
JBAT1
JWOL1
BIOS
J6: MDM_IN
J5: AUX_IN
CPUFAN
JSOR1
JRMS1
SW1
PSFAN
IR
BATT
+
Top: LPT
Bottom:
COM1/
COM2
Top: Midi/
GamePort
Bottom:
Line-Out
Line-In
Mic
1
4
J8: CD_IN
J3
JVSB1
(Reserved)
System
Hardware
Monitor
(optional)
AGP SLOT

CHAPTER 2 HARDWARE INSTALLATION
2-1
Chapter 2
HARDWARE INSTALLATION
2.1 Central Processing Unit: CPU
The mainboard operates with Intel®Pentium®II/CeleronTM processor. The
mainboard uses a CPU Slot called Slot 1 for easy CPU installation and a
jumper 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 Procedures
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..
Required Things:
Pentium®IIprocessor- Processor.
*RetentionMechanism(RM)- Plastic Guide that holds the S.E.C. Catridge
in the Slot 1 connector.
*RetentionMechanismAttachMount(RMAM)-Bolt/Bridge assemblies
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

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