Intel MS-6112 User Manual

CHAPTER 1 INTRODUCTION

Chapter 1

INTRODUCTION

The MS-6112 is a high-performance personal computer mainboard based on
the Pentium® II processor.

The mainboard uses the highly integrated Intel® 82440LX AGPset which
optimize the system bandwidth and concurrency with the implementation of
Quad Port Acceleration (QP A). QPA provides 4-port concurrent arbitration
of the processor bus, graphics, PCI bus and SDRAM.

The Intel® 82371AB 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® 82371AB 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 LM78 System Hardware Monitor
Controller as optional function. The LM78 function includes: CPU /power
supply/chassis fan revolution detect, CPU/system voltage monitor, system
temperature monitor, and chassis intrusion detect(optional).

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CHAPTER 1 INTRODUCTION

1.1 Mainboard Features

CPU

l Slot 1 for Pentium
l Supports 200MHz, 233MHz, 266MHz, 300MHz, and 333MHz.
l Core/Bus ratios are x2, x2.5, x3, x3.5, x4, x4.5, x5, x5.5, x6 and higher.

Switching V oltage Regulator

l On-board switching mode DC-DC Step Down Regulator.
l Conforms to Intel
l Over-Voltage and Over-Current protection.

Chip Set

®

l Intel

82440LX PCI Chipset.

Clock Generator

l 66.6MHz clocks are supported.

Main Memory

l Supports six memory banks using three 168-pin unbuffered DIMM

sockets.

l Supports a maximum memory size of 512MB with SDRAM, or 1GB with

EDO.

l Supports ECC(Error Check Correct) and EC(Multiple-Bit Error Correction)

function.

l Supports 3.3v Extended Data Output (EDO) and SDRAM DIMM.

®

II processor

®

VRM ver 8.1 specifications.

Slots

l One AGP(Accelerated Graphics Port) slot.

- AGP specification compliant

- AGP 66/133MHz 3.3v device support

l Three 32-bit Master PCI Bus slots and four 16-bit ISA bus slots wherein

one shared slot that can be used as ISA or PCI.

l Supports 3.3v/5v PCI bus Interface.

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CHAPTER 1 INTRODUCTION

On-Board IDE

l An IDE controller on the Intel

®

82371AB PCI Chipset provides IDE HDD/

CD-ROM with PIO, Bus Master and Ultra DMA/33 operation modes.

l Can connect up to four IDE devices.

On-Board Peripherals

l On-Board Peripherals include:

- 1 floppy port supports 2 FDD with 360K, 720K, 1.2M, 1.44M and

2.88Mbytes.

- 2 serial ports (COMA + COMB)

- 1 parallel port supports SPP/EPP/ECP mode

- 2 USB ports

- 1 IrDA connector for SIR.

BIOS

l The mainboard BIOS provides “Plug & Play” BIOS which detects the

peripheral devices and expansion cards of the board automatically.

l The mainboard provides a Desktop Management Interface(DMI) function

which records your mainboard specifications.

On-Board System Hardware Monitor(LM78)

l CPU/Power Supply/Chassis Fan Revolution Detect
l CPU Fan Control (the fan will automatically stop when the system enters

suspend mode)

l System Voltage Detect
l Chassis Intrusion Detect(reserved)
l Display Actual Current V oltage

RTC

l Non-Volatile R TC.

Keyboard Connector

l PS/2® keyboard interface and PS/2® mouse interface.

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CHAPTER 1 INTRODUCTION

Dimension

l A TX Form Factor: 30cm(L) x 23cm(W) x 4 layers PCB.
l Double deck I/O connectors, compatible with Intel

®

Venus Mainboard.

Mounting

l 9 mounting holes.

1-4

CHAPTER 1 INTRODUCTION

1.2 Mainboard Layout

Top: mouse
Bottom:
keyboard

USB
Top: Port 1
Bottom:

Port 2

Top: LPT

Bottom:

COM A

COM B

JFAN

KBC

LM75

(optional)

PSFAN1

Power Supply

CFAN1

ATX

LM78

(optional)

SLOT 1

FDC

BATT

JBAT1

IDE2

+

JSW1

SW1

IDE1

JSW2
JGL1

JFP1

DIMM 3

DIMM 2

J10

Chassis
Intrusion

Sensor

(optional)

J9

DIMM 1

Clock

Generator

1

IR1

J3

J4

FW82443LX

AGP

PCI SLOT 1

PCI SLOT 2

PCI SLOT 3

FW82371AB

ISA SLOT

ISA SLOT

BIOS

JLG1

ISA SLOT

ISA SLOT

JMODE1

SFAN1

MS-6112

1-5

CHAPTER 2 HARDWARE INSTALLATION

Chapter 2

HARDWARE INSTALLATION

2.1 Central Processing Unit: CPU

The mainboard operates with Intel® Pentium® II processor . 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.

2-1

CHAPTER 2 HARDWARE INSTALLATION

2.1-1 CPU Installation Procedures

There are two kinds of Pentium® II processor that is currently used: the
OEM Pentium® II processor and the Boxed Pentium® II processor . OEM
Pentium® II processor has no Heat Sink, Fan and Heat Sink Support, while
the Boxed Pentium® II processor is provided with Heat Sink w/ fan and Heat
Sink Support.

A. OEM Pentium® II processor Installation Procedures

Processor
Lock

Pentium
Processor

Heat Sink
Support
Top Bar

®

II

Heat Sink
W/Fan

Notch Hole

Retention
Mechanism

Heat Sink
Support Base

Heat Sink
Support Pin

Required Things:

Pentium® II processor - Processor .
*Retention Mechanism(RM) - Plastic Guide that holds the S.E.C. Catridge

in the Slot 1 connector.

*Retention Mechanism Attach Mount(RMAM) - Bolt/Bridge assemblies

inserted up through the bottom of the
motherboard. RM secures to RMAM ( 2
RMAM required per RM ).

*Heat Sink Support Base (HSSBASE) - Plastic support bar mounted to

the mainboard under the ATX heatsink.
(One leg is always bigger than the other one)

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CHAPTER 2 HARDWARE INSTALLATION

*Heat Sink Support Pin (HSSPIN) - Plastic pins inserted through the

HSSBASE to secure it to the mainboard (2
required per Assembly).

*Heat Sink Support T op 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

processor with metal clip.

Note: * Provided by MSI mainboard.

** Provided by Special request.

HSSBASE

RM

HSSPIN

RMAM

HSSTOP

2-3

CHAPTER 2 HARDWARE INSTALLATION

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.

Retention

ê

Notch
Key

Mechanism

ê

Key

SLOT1

êê

Retention

Mechanism

Attach Mount

2-4

CHAPTER 2 HARDWARE INSTALLATION

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.

pins

Leg

Heat Sink
Support Base

Heat Sink
Support Pin

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.

2-5

CHAPTER 2 HARDWARE INSTALLATION

P

Step 5: Install the Heat Sink with Fan to the Processor.

Push down the metal clips, so that they are in line with the back of
the Heat Sink. Be careful, so as not detach the metal clips from the
Heat Sink.

Heat Sink w/ Fan

The arrow

â

should be

Heat Sink
Base Holder

Metal Clips

pointing
down.

In case the metal clips are detached from the Heat Sink, re-attach
them. Look for the arrow on the metal clip. This arrow should be
pointing down and aligned with the Heat Sink Support Base Holder.

Attach the Heat Sink to the processor.

Clip Holder

Secure
holes

Clip Holder

S.E.C. Cartridge - Th erma l
Isometric View

Pentium® II processor (Back)

Heat Sink w/ Fan(Back)

Metal Clips Ear

Secure
Posts

Metal Clips Ear

- Look at the back of the Heat Sink and take note of the 2 secure
posts. Insert these 2 Secure posts to the 2 secure holes on the
back of the processor.

- Align the ears of the metal clips with the clip holders on the back of
the processor. Use a screw driver to push the metal clips onto the
clip holders. Check for a perfect fit.

2-6

CHAPTER 2 HARDWARE INSTALLATION

Step 6: Install the Processor.

Unlock the Processor by pushing in the Processor Locks.

è

Insert the Processor like inserting a PCI or an ISA card.

Step 7: Lock the Processor Locks.

Secure the CPU by pulling the Processor Locks out.

ç

ç

è

2-7

CHAPTER 2 HARDWARE INSTALLATION

Step 8: Install the Heat Sink Support T op Bar .

Push the Heat Sink Support Top Bar to the Heat Sink Support Base,
Until you hear a “click” sound. Check for a perfect fit.

Heatsink
Support Top
Bar

The installation is now complete.

2-8

CHAPTER 2 HARDWARE INSTALLATION

B. Boxed Pentium® II processor Installation Procedures

The Boxed Pentium® II processor has a built- in Fan and Heat Sink. It also
has a Heat Sink Support. So if you’re going to use the Boxed processor, all
you need is the Retention Mechanism.

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.

Retention

ê

Mechanism

ê

Notch
Key

Key

SLOT1

êê

Retention

Mechanism

Attach Mount

2-9

CHAPTER 2 HARDWARE INSTALLATION

Step 3: Install the Heat Sink Support Base.

Look for the 2 holes across Slot 1, and match it with the 2 Heat Sink
Support Base. Take note that one hole/base is bigger than the other.

Retention
Mechanism

Notch
Hole

PC-3742

Heat Sink
Support Base

Push the Heat Sink Support Base onto the mainboard, until you hear
a click sound. Check for a perfect fit.

2-10

CHAPTER 2 HARDWARE INSTALLATION

Step 4: Install the Heat Sink Support.

Attach the 2 Heat Sink Supports to the sides of the Processor. These
Heat Sink Supports will fit in any direction, so be sure that the Heat
Sink Support Locks are oriented outwards for the proper direction.

®

Boxed

Intel

TM

Pentium
Processor

Heat Sink
Support

II

Heat Sink
Support Lock

PC-3743

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CHAPTER 2 HARDWARE INSTALLATION

PC-3744

Step 5: Unlock the Processor Locks and Heat Sink Support Locks.

Push in the Processor Locks. Open the Heat Sink Support Locks.

Processor
Lock

Heatsink
Support
Lock

Step 6: Insert the Processor like inserting a PCI or an ISA card.

2-12

CHAPTER 2 HARDWARE INSTALLATION

PC-3745

Step 7: Lock the Processor Locks and Heat Sink Support Locks

Secure the CPU by pushing out the Processor Locks. Close the Heat
Sink Support Locks.

The installation is now complete.

2-13

CHAPTER 2 HARDWARE INSTALLATION

2.1-2 CPU Speed Setting: SW1

To adjust the speed of the CPU, you must know the spec. of your CPU
(always ask the vendor for CPU spec.). Then look at Table 2.1 (200 ~
333MHz Intel® Pentium® II processor) for setting.

1 2 3 4

SW1

Speed Setting

DIP

OFF

ON

ON

CPU
Type

200MHz

233MHz

266MHz

300MHz

333MHz

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

SW1

DIP

DIP

DIP

DIP

DIP

1 2 3 4

ON

1 2 3 4

ON

1 2 3 4

ON

1 2 3 4

ON

1 2 3 4

ON

Table 2.1 200 ~ 333MHz Intel® Pentium® II processor

2-14

CHAPTER 2 HARDWARE INSTALLATION

2.1-3 CPU Clock Generator Setting: J10/J9

These jumper is used to set the CPU Clock.

J10 J9

CPU Clock J10 J9

66 MHz

68 MHz

75 MHz

Note: 68/75 MHz CPU clock are both

reserved function.

2-15

CHAPTER 2 HARDWARE INSTALLATION

2.1-4 CPU Fan Power Connectors: JFAN/CFAN1/SFAN1/

PSFAN1

These connectors support system cooling fan with +12V. It supports three
pin head connector. When connecting the wire to the connector, always
take note that the red wire is the positive and should be connected to the
+12V, the black wire is Ground and should be connected to GND. If your
mainboard has LM78 chipset on-board, you must use a specially designed
fan with speed sensor to take advantage of LM78’s CPU fan control.

GND

GND

+12V

SENSOR

CF AN1

GND

+12V

GND

+12V

SENSOR

PSFAN1

JFAN

GND

+12V

SENSOR

PSFAN1 : Power Supply Fan

SF AN1

CFAN1 : CPU Fan
SFAN1 : System(Chassis) Fan

For fans with fan speed sensor, every rotation of the fan will send out 2
pulses. LM78 will count and report the fan rotation speed.

Note: 1. CFAN1/SFAN1/PSFAN1 are the CPU, Power and Chassis

Cooling Fan Speed Connector (reserved for LM78 System Hardware
Monitor Option.)

2. Always consult vendor for proper CPU cooling fan.

2-16