MSI ATX BX2 User manual

CHAPTER 1 INTRODUCTION
1-1
The ATX BX2 mainboard is a high-performance personal computer
mainboard based on the Pentium®II processor. The Pentium®II processor
supports MMXTM (Multimedia 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 as an
optional function. This function includes: 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
1.1 Mainboard Features
CPU
lSlot 1 for Pentium®II processor.
lSupports233MHz,266MHz,300MHz,333MHz, 400MHz,andfaster.
lCore/Busratiosare x2,x2.5,x3,x3.5,x4,x4.5,x5,x5.5,x6andhigher.
SwitchingVoltageRegulator
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®82440BXAGP chipset.
ClockGenerator
l66.6MHz and 100MHz clocks are supported.
l68/75/83MHzand 103/112MHzclocks(reserved)
MainMemory
lSupports six memory banks using three 168-pin unbuffered DIMM
sockets.
lSupportsamaximummemorysizeof384MB(8Mx8) or768MB(16Mx4)
registered DIMM only.
lSupportsECC(1-bitErrorCodeCorrect)function.
lSupports only 3.3v SDRAM DIMM.
Slots
lOne AGP(Accelerated Graphics Port) slot.
- AGP specification compliant
- AGP66/133MHz3.3vdevicesupport
lFour 32-bit Master PCI Bus slots and three 16-bit ISA bus slots wherein
one shared slot that can be used as ISA or PCI.
lSupports 3.3v/5v PCI bus Interface.
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CHAPTER 1 INTRODUCTION
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On-BoardIDE
lAn IDE controller on the Intel®82371EB PCI chipset provides IDE HDD/
CD-ROM with PIO, Bus Master and Ultra DMA/33 operation modes.
lCan connect up to four IDE devices.
On-BoardPeripherals
lOn-BoardPeripheralsinclude:
-1floppyportsupports2FDDwith360K,720K,1.2M,1.44Mand
2.88Mbytes.
-2serialports(COMA+COMB)
- 1 parallel port supports SPP/EPP/ECP mode
- 2 USB ports
- 1 IrDA connector for Fast IrDA. (reserved)
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.
lThe mainboard provides “CPU Plug & Play” function. (reserved)
CPU Plug & Play - the user don’t need jumper/DIP switch to set the CPU
speed setting. The BIOS is used to set the speed.
SystemHardwareMonitor(optional)
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 (reserved)
lChassis Intrusion Detect (reserved)
lDisplay Actual Current Voltage
RTC
lPIIX4(82371EB)built-inRTC.

CHAPTER 1 INTRODUCTION
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KeyboardConnector
lPS/2®keyboard interface and PS/2®mouse interface.
Dimension
lATXFormFactor: 30cm(L)x18.6cm(W)x4 layersPCB.
lDouble deck I/O connectors, compatible with Intel®Venus Mainboard.
Mounting
l6 mounting holes.
OtherFeatures
lKeyboard Password Wake-Up.(reserved)
lLANWake-Up.
lInternal/ExternalModem Wake-Up.
lAC Power Loss Restore.

CHAPTER 1 INTRODUCTION
1.2 Mainboard Layout
FDD IDE1
IDE2
DIMM 1 DIMM 2 DIMM 3
Top: mouse
Top: Port1
USB
Bottom:
Port2
Top: LPT
Bottom:
COMA
COMB
ATX
Power Supply
JP1
CPUFAN1
PCI SLOT 3
PCI SLOT 2
PCI SlOT 1
SLOT 1
AGP Slot
PCI SLOT 4
JGS1
JGL1
ISA SLOT 2
ISA SLOT 3
BATT
+
BIOS
JMODE1
SFAN1
(optional)
IR1
JSOR1
(optional)
J1
J2
JFP1
FW82371EB JBAT1
1-5
JVSB
FW82443BX
JRMS1
JWOL
JMDM1
Bottom:
keyboard
ISA SLOT 1
PSFAN1
(optional)
SW1