MSI ATX IR1 User manual

CHAPTER 1 INTRODUCTION
1-1
The ATX IR1 mainboard is a high-performance personal computer
mainboard based on the AMD®AthlonTM processor with 3DNOWTM. The
AMD®AthlonTM processor is the newest microprocessor in the AMD K86TM
family of microprocessors.
The mainboard uses the highly integrated AMD®751 system controller and
AMD®756 peripheral controller. The AMD®751 system controller features:
the S2k system interface supports a 100Mhz clock and double-data rate
(DDR) transfers, the 33MHz 32-bit PCI bus interface supports up to five
masters, the 66MHz AGP 1.0 compliant interface supports 2x data transfer
mode, and High Speed memory designed to support a 100MHz SDRAM (PC-
100-compatible-DIMM) with serial presence detect(PSD). The AMD®756
peripheral bus controllers feature an integrated ISA bus controller, an
enhanced IDE controller with Ultra DMA-66 support, and a keyboard/mouse
controller.
The ATX IR1 mainboard is our first system board to implement the AMD®
750 chipset (AMD®751 and AMD®756), which supports a single Slot A for
AMD®AthlonTM processor.
Chapter 1
INTRODUCTION

CHAPTER 1 INTRODUCTION
1-2
1.1 Mainboard Features
CPU
lSlot A for AMD®AthlonTM processor.
lSupport500MHz,550MHz,600MHz,orhigherprocessor
Chipset
lAMD®IrongateTM chipset. (Northbridge)
-200MHzEV6SystemInterfacespeed
-100MHzSDRAM
-1x/2xAGp
- Status - Silicon currently in bring-up
lAMD®756TM(Viper) chipset. (Southbridge)
-OHCIUSB
-APIC
- ACPI Power Management
FrontSideBus(FSB)
l100MHz clock is supported.
MainMemory
lSupports three memory banks using three 168-pin unbuffered DIMM
sockets.
lSupportsamaximum memory size of768MBforSDRAM.
lSupports 3.3vPC100SDRAMDIMM.
Slots
lOne AGP (Accelerated Graphics Port) slot.
- AGP specification compliant
- AGP66/133MHz 3.3v device support
lFive 32-bit Master PCI Bus slots and two 16-bit ISA bus slots (wherein
one PCI/ISA is shared)
lSupports 3.3v/5v PCI bus Interface.

CHAPTER 1 INTRODUCTION
1-3
On-BoardIDE
lAn IDE controller on the AMD®756TM Viper chipset provides IDE HDD/
CD-ROMwith PIOand Ultra DMA/66 operation modes.
lCan connect up to four IDE devices.
On-BoardPeripherals
lOn-BoardPeripherals 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
- 4 USB ports
- 1 IrDA connector for SIR.
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.
Dimension
lATXForm Factor: 20.9cmx 30.5cm
Mounting
l8 mounting holes.

CHAPTER 1 INTRODUCTION
1-4
1.2 Mainboard Layout
MS-6167 ATX IR1 Mainboard
FDD
IDE2 IDE1
DIMM 1 DIMM 2 DIMM 3
Top: mouse
Top: Port1
USB
Bottom:
Port2
Top: LPT
Bottom:
COMA
COMB
ATX
Power Supply
J9: CPUFAN
PCI SLOT 3
PCI SLOT 2
PCI SlOT 1
SLOT A
AGP Slot
PCI SLOT 4
ISA SLOT 2
BATT
+
BIOS
J6: SYSFAN
AMD-756
chipset JFP1
AMD-751
chipset
JWOL
Bottom:
keyboard
ISA SLOT 1
PCI SLOT 5
USB
Front
Header
IR
Winbond
W83977ATF-AW
J12:
PSFAN
JSLP1
JBAT1

CHAPTER 2 HARDWARE INSTALLATION
2-1
Chapter 2
HARDWARE INSTALLATION
2.1 Central Processing Unit: CPU
Step 1: Install the Retention Mechanism.
Attach the Retention Mechanism to the Mainboard. Push the Plastic
lock to secure the Retention Mechanism into the mainboard.
Secure the processor by
pulling up the Retention
Mechanism Processor
Lock
Insert the processor
like inserting a PCI or
an ISA card
To release the
processor, push the
Retention Mechanism
Processor lock down
Step 2: Install the Processor.
Insert the Processor like inserting a PCI or an ISA card.
Step 3: Lock the Processor.
Lock the processor by pulling up the Retention Mechanism proces-
sor lock shown above.
2.1-1 Processor Installation Procedure

CHAPTER 2 HARDWARE INSTALLATION
2-2
2.1-2 CPU Core Speed Derivation Procedure
The Mainboard can auto-detect the processor speed. Just insert the
AMD Athlon processor into Slot A.
If CPUClock = 100MHz
Core/Bus ratio = 5
then CPU core speed = Host Clock x Core/Busratio
= 100MHz x5
= 500MHz

CHAPTER 2 HARDWARE INSTALLATION
2-3
2.1-4 Fan Power Connectors: J9, J12, & J6
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 System Hardware Monitor chipset on-board, you must use a
specially designed fan with speed sensor to take advantage of this function.
For fans with fan speed sensor, every rotation of the fan will send out 2
pulses. System Hardware Monitor will count and report the fan rotation
speed.
Note: 1. Always consult vendor for proper CPU cooling fan.
2. CPU FAN supports the FAN control. You can install PC Alert
utility. This will automatically control the CPU FAN Speed according
to the actual CPU temperature.
J9
J9: Processor Fan
J12: Power Supply Fan
J6: System Fan
+12VGND SENSOR
GND
+12V
Sensor
J12
J6
+12VGND SENSOR

CHAPTER 2 HARDWARE INSTALLATION
2-4
2.2 Clear CMOS Jumper: JBAT1
A battery must be used to retain the mainboard configuration in CMOS
RAM. Short 1-2 pins of JBAT1 to store the CMOS data.
Keep Data Clear Data
11
3
3
Note: You can clear CMOS by shorting 2-3 pin, while the system is off.
Then, return to 1-2 pin position. Avoid clearing the CMOS while
the system is on, it will damage the mainboard. Always unplug
the power cord from the wall socket.
22
JBAT1
1
3

CHAPTER 2 HARDWARE INSTALLATION
2-5
2.3 Memory Installation
2.3-1 Memory Bank Configuration
Themainboardsupportsa maximum memory size of 768MB for SDRAM: It
provides three 168-pin unbufferedDIMMs (Double In-Line Memory Mod-
ule) sockets. It supports 8 MB to 256 Mbytes DIMM memory module.
DIMM3(Bank0+Bank1)
DIMM2(Bank2+Bank3) DIMM1Bank4+Bank5)

CHAPTER 2 HARDWARE INSTALLATION
2-6
A. HowtoinstallaDIMMModule
1. The DIMM slot has 2 Notch Keys “VOLT and DRAM”, so the
DIMM memory module can only fit in one direction.
2. Insert the DIMM memory module vertically into the DIMM slot.
Then push it in.
3. The plastic clip at the side of the DIMM slot will automatically
close.
Single Sided DIMM
Double Sided DIMM
VOLTDRAM
2.3-2 Memory Installation Procedures