CHAPTER 1 INTRODUCTION
1-1
The MICRO A TX ZX mainboard is a high-performance personal computer
mainboard based on the Intel® Pentium® II/Pentium® III/CeleronTM processor .
This mainboard combines leading edge nVIDIA Riva TNT2 M64 technology
in graphics and Creative® ES1373 PCI technology in audio. The Intel
®
Pentium® II/III/Celeron
TM
processor supports MMX
TM
(Multimedia Exten-
sion) technology.
The mainboard uses the highly integrated Intel® 82443ZX 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
of 33MB/s.
The mainboard also supports the System Hardware Monitor Controller as an
optional function. 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
l Slot 1 for Intel
®
Pentium® II/Pentium® III/CeleronTM processor .
l Supports 233MHz, 266MHz, 300MHz, 333MHz, 350MHz, 400MHz,
450MHz, 500MHz and faster .
Chipset
l Intel
®
440ZX AGPset
- support 66 or 100Mhz Host bus frequency
- support AGP & PCI
l Intel
®
PIIX4E chipset
- PCI to ISA Bridge PC98 Compliant
- UltraDMA-33 Master Mode PCI IDE Controller
- Super I/O Interface
- 324 pin BGA package
FSB (Front Side Bus)
l 66.6MHz and 100MHz clocks are supported.
Main Memory
l Supports four memory banks using two 168-pin unbuffered DIMM.
l Supports a maximum memory size of 256MB (8M x 8).
l Supports 3.3v SDRAM DIMM.
Slots
l Three 32-bit Master PCI Bus slots
l Supports 3.3v/5v PCI bus Interface.
On-Board IDE
l An IDE controller on the Intel
®
PIIX4E 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.
CHAPTER 1 INTRODUCTION
1-3
On-Board Peripherals
l On-Board Peripherals include:
- 1 floppy port supports 2 FDD with 360K, 720K, 1.2M, 1.44M and
2.88Mbytes.
- 1 serial port (COM A) + 1 serial connector (COM B)
- 1 parallel port supports SPP/EPP/ECP mode
- 1 MIDI/Game Port
- 2 USB ports
- 1 IrDA connector for SIR/FIR.
- 1 Audio port (Line_In, Line_Out, and Mic_In Jack)
- 1 VGA port
VGA
l nVIDIA Riva TNT2 M64
- Running on AGP BUS.
- Onboard 32MB (4*16M) SDRAM.
- 3D Acceleration.
- AGP 2x mode support pipelined protocols.
Sound
l Creative
®
ES1373
- Running on PCI BUS.
- Support Direct Sound and Direct Sound 3D
- AC97’ Compliant
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.
l ACPI(Advanced Configuration and Power Interface) feature.
Dimension
l MICRO-ATX Form Factor: 24.4cm(L) x 20.6cm(W) x 4 layers PCB
CHAPTER 1 INTRODUCTION
1-4
Mounting
l 6 mounting holes.
System Hardware Monitor (optional)
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 CPU Overheat W arning.
l Display Actual Current Voltage
Other Features
l Keyboard Password Wake-Up (reserved)
l LAN W ake-Up
l Internal/External Modem W ake-Up
CHAPTER 1 INTRODUCTION
1-5
PCI SLOT 3
PCI SLOT 2
PCI SLOT 1
ATX
Power Supply
FW82443ZX
SLOT 1
DIMM 2
Top: Mouse
Top: Port 1
USB
DIMM 1
IDE2
Bottom:
Port 2
IDE1
FDD
FW82371EB
JMDM1
Creative
ES1373
JFP
JGS1
JGL1
BIOS
J5: MDM_IN
J7: AUX_IN
COM 2
CPUFAN
JRMS1
SW1
IR
BATT
+
Top: LPT
Bottom:
COM A
VGA Port
Top: Midi/
Game Port
Bottom:
Line-Out
Line-In
Mic
1.2 Mainboard Layout
14
J8: CD_IN
SDRAM
JVSB1
(Reserved)
SDRAM
SDRAM SDRAM
Bottom:
Keyboard
PSFAN
W83977EF-AW
SYSFAN
JWOL
JBAT1
nVIDIA
Riva TNT2
M64
Medion 9901 MICRO A TX ZX Mainboard
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 processor lock shown above.
Note: The Retention Mechanism processor lock can only lock S.E.C.C. 2
and S.E.P.P . processor .
2.1-1 Processor Installation Procedures
CHAPTER 2 HARDWARE INSTALLATION
2-2
2.1-2 CPU Core Speed Derivation Procedure
1 2 3 4 Core/Bus Ratio
ON OFF ON ON 2 .5
ON ON OFF ON 3
ON OFF OFF ON 3. 5
ON ON ON OFF 4
ON OFF ON OFF 4 . 5
ON ON OFF OFF 5
ON OFF OFF OFF 5 . 5
OFF ON ON ON 6
OFF OFF ON ON 6. 5
OFF ON OFF ON 7
OFF OFF OFF ON 7 . 5
OFF ON ON OFF 8
1 . The DIP Switch SW1 (1, 2, 3, and 4) is used to set the Core/Bus (Fraction)
ratio of the CPU. The actual core speed of the CPU is the Host Clock
Frequency multiplied by the Core/Bus ratio. For example:
If CPU Clock = 66MHz/100MHz
Core/Bus ratio = 4
then CPU core speed = Host Clock x Core/Bus ratio
= 66MHz x 4/100MHz x 4
= 266MHz/400MHz
SW1 CPU
Note: The CPU Bus Frequency is set at 66MHz or 100MHz by CPU
default.
ON - Short OFF - Open
CHAPTER 2 HARDWARE INSTALLATION
2-3
2.1-3 CPU Speed Setting: SW1
To adjust the speed of the CPU, you must know the specification of your
CPU (always ask the vendor for CPU specification). The mainboard can
auto-detect between 66 or 100MHz CPU Bus Frequency .
SW1
123
4
CHAPTER 2 HARDWARE INSTALLATION
2-4
400MHz
450MHz
350MHz
CPU
T ype
SW1
b. 100MHz CPU Bus Frequency
Table 2.1 233 ~ 333MHz Intel® Pentium® II/III/Celeron
TM
processor
233MHz
266MHz
300MHz
333MHz
CPU
T ype
SW1
a. 66MHz CPU Bus Frequency
123
4
123
4
123
4
123
4
123
4
123
4
123
4
500MHz
550MHz
123
4
Table 2.2 350 ~ 550MHz Intel® Pentium® II/III processor
123
4
CHAPTER 2 HARDWARE INSTALLATION
2-5
SENSOR
+12V
GND
CPUFAN
2.1-4 Fan Power Connectors: CPUFAN/PSFAN/SYSFAN
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.
+12V
SENSOR
GND
PSFAN
SYSFAN
+12V
SENSOR
GND
PSFAN: Power Supply Fan
CPUF AN: Processor Fan
SYSF AN: System(Chassis) Fan
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 F AN supports the FAN control. Y ou can install PC Alert
utility . This will automatically control the CPU F AN Speed according
to the actual CPU temperature.
CHAPTER 2 HARDWARE INSTALLATION
2-6
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
1
1
3
3
Note: You can clear CMOS by shorting 2-3 pin, while the system is of f.
Then, return to 1-2 pin position. A void clearing the CMOS while
the system is on, it will damage the mainboard. Always unplug
the power cord from the wall socket.
2
2
JBAT1
1
3
CHAPTER 2 HARDWARE INSTALLATION
2-7
2.3 Memory Installation
2.3-1 Memory Bank Configuration
The mainboard supports a maximum memory size of 256MB (8M x 8) for
SDRAM: It provides two 168-pin unbuffered DIMMs (Double In-Line
Memory Module) sockets. It supports 8 MB to 256 Mbytes DIMM memory
module.
DIMM1(Bank0 + Bank1)
DIMM2(Bank2+ Bank3)
There are two kinds of DIMM specification supported
by this mainboard: PC100 and PC66. If you use
66MHz CPU Bus Frequency, these two DIMM Specs. is
supported. If you use 100 MHz CPU Bus Frequency,
only PC100 DIMM Specs. is supported.
!
W ARNING!
CHAPTER 2 HARDWARE INSTALLATION
2-8
A. How to install a DIMM Module
1. The DIMM slot has a two Notch Key “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
CHAPTER 2 HARDWARE INSTALLATION
2-9
1 . Supports only SDRAM DIMM.
2 . T o operate properly , at least one 168-pin DIMM module must be
installed.
3. This mainboard supports T able Free memory , so memory can be installed
on DIMM1 or DIMM 2 in any order .
4. Supports 3.3 volt DIMM.
5. The DRAM addressing and the size supported by the mainboard is
shown below:
2.3-3 Memory Population Rules
16M 1Mx16 ASYM 11 8 8MBx4 16MBx8
2Mx8 ASYM 11 9 16MBx8 32MBx16
64M 2Mx32 ASYM 11 9 32MBx2 64MBx4
2Mx32 ASYM 12 8 16MBx2 32MBx4
4Mx16 ASYM 11 10 32MB 64MB
4Mx16 ASYM 13 8 32MB 64MB
8Mx8 ASYM 13 9 64MB 128MB
64M 2Mx32 ASYM 12 8 16MB 32MB
4Mx16 ASYM 13 8 32MB 64MB
8Mx8 ASYM 13 9 64MB 128MB
DRAM
Tech.
DRAM
Density &
Width
DRAM
Addressing
Address Size
MB/DIMM
Row
Column
Single
Side(S)
Double
Side(D)
no.
pcs.
no.
pcs.
T able 2.3-1 SDRAM Memory Addressing
CHAPTER 2 HARDWARE INSTALLATION
2-10
2.4 Case Connector: JFP
The Power Switch, Reset Switch, Power LED, Speaker, Keylock and HDD
LED are all connected to the JFP connector block.
JFP
Power
Switch
Power LED
+
Reset
Switch
HDD
LED
+
Speaker
Buzzer
(short pin)
14
15
Keylock
Dual
Color
LED
Single
Color
LED
CHAPTER 2 HARDWARE INSTALLATION
2-11
2.4-1 Power Switch
Connect to a 2-pin push button switch. This switch has the same feature
with JRMS1.
2.4-2 Reset Switch
Reset switch is used to reboot the system rather than turning the power ON/
OFF . Avoid rebooting while the HDD LED is lit. You can connect the Reset
switch from the system case to this pin.
2.4-3 Power LED
The Power LED is lit while the system power is on. Connect the Power LED
from the system case to this pin. There are two types of LED that you can
use: 3-pin single color LED or 2-pin dual color LED(ACPI request).
a. 3 pin single color LED connect to pin 4, 5, & 6. This LED will lit
when the system is on.
b. 2 pin dual color LED connect to pin 5 & 6.
GREEN Color: Indicate the system is in full on mode.
ORANGE Color: Indicate the system is in suspend mode.
2.4-4 Speaker
Speaker from the system case is connected to this pin.
If on-board Buzzer is available:
Short pin 14-15: On-board Buzzer Enabled.
Open pin 14-15: On-board Buzzer Disabled.
2.4-5 HDD LED
HDD LED shows the activity of a hard disk drive. A void turning the power
off while the HDD led is lit. You can connect the HDD LED from the system
case to this pin.
2.4-6 Keylock
Keylock allows you to disable the keyboard for security purposes. You can
connect the keylock to this pin.
CHAPTER 2 HARDWARE INSTALLATION
2-12
2.5 Floppy Disk Connector: FDD
The mainboard also provides a standard floppy disk connector that supports 360K, 720K, 1.2M, 1.44M and 2.88M floppy disk types. This connector
supports the provided floppy drive ribbon cables.
FDD
1
CHAPTER 2 HARDWARE INSTALLATION
2-13
2.6 Hard Disk Connectors: IDE1 & IDE2
The mainboard has a 32-bit Enhanced PCI IDE Controller that provides PIO
mode 0~4, Bus Master, and Ultra DMA/33 function. It has two HDD
connectors IDE1 (primary) and IDE2 (secondary). You can connect up to
four hard disk drives, CD-ROM, 120MB Floppy (reserved for future BIOS)
and other devices to IDE1 and IDE2. These connectors support the
provided IDE hard disk cable.
IDE1(Primary IDE Connector)
The first hard drive should always be connected to IDE1. IDE1 can
connect a Master and a Slave drive. You must configure second hard
drive to Slave mode by setting the jumper accordingly .
IDE2(Secondary IDE Connector)
IDE2 can also connect a Master and a Slave drive.
Primary IDE Connector
Secondary IDE Connector
1
1
CHAPTER 2 HARDWARE INSTALLATION
2-14
2.7 Power Supply
2.7-1 ATX 20-pin Power Connector: JWR1
This connector supports the power button on-board. Using the ATX power
supply , functions such as Modem Ring Wake-Up and Soft Power Off are
supported by this mainboard. This power connector supports instant power
on function which means that system will boot up instantly when the power
connector is inserted on the board.
PIN SIGNAL
11 3.3V
12 -12V
13 GND
14 PS_ON
15 GND
16 GND
17 GND
18 -5V
19 5V
20 5V
PIN SIGNAL
1 3.3V
2 3.3V
3 GND
45V
5 GND
65V
7 GND
8 PW_OK
9 5V_SB
10 12V
PIN DEFINITION
Warning: Since the mainboard has the instant power on function, make
sure that all components are installed properly before inserting the power
connector to ensure that no damage will be done.
AT X
Power Connector
11
20
10
1
CHAPTER 2 HARDWARE INSTALLATION
2-15
2.7-2 Remote Power On/Off Switch: JRMS1
Connect to a 2-pin push button switch. During OFF state, press once and
the system turns on. During ON stage, push once and the system goes to
sleep mode: pushing it more than 4 seconds will change its status from ON
to OFF. If you want to change the setup, you could go to the BIOS Power
Management Setup. This is only used for ATX type power supply.
JRMS1
CHAPTER 2 HARDWARE INSTALLATION
2-16
2.8 IrDA Infrared Module Connector: IR
The mainboard provides one 5-pin infrared (IR) connector for IR modules.
This connector is for optional wireless transmitting and receiving infrared
module. You must configure the setting through the BIOS setup to use the
IR function. FIR and Consumer IR are reserved functions.
VCC
NC
IRRX
GND
IRTX
1
IR
CHAPTER 2 HARDWARE INSTALLATION
2-17
2.9 Serial Port Connectors: COM 1 and COM 2
The mainboard has a 9-pin male DIN connector for serial port COM 1. This
port is a 16550A high speed communication port that send/receive 16 bytes
FIFOs. You can attach a mouse or a modem cable directly into this connector .
PIN SIGNAL
1 DCD(Data Carry Detect)
2 SIN(Serial In or Receive Data)
3 SOUT(Serial Out or Transmit Data)
4 DTR(Data T erminal Ready)
5 GND
6 DSR(Data Set Ready)
7 RTS(Request To Send)
8 CTS(Clear To Send)
9 RI(Ring Indicate)
PIN DEFINITION
1 2 3 4 5
6 7 8 9
COM 1
Serial Port (9-pin Male)
Note: There’ s another serial port connector (COM 2), which is
located on the mainboard. Connect a serial port 9-pin male
port into this connector.
CHAPTER 2 HARDWARE INSTALLATION
2-18
2.10 Parallel Port Connector: LPT
The mainboard provides a 25 pin female centronic connector for LPT . A
parallel port is a standard printer port that also supports Enhanced Parallel
Port(EPP) and Extended capabilities Parallel Port(ECP). See connector and
pin definition below:
PIN SIGNAL PIN SIGNAL
1 STROBE 14 AUTO FEED#
2 DAT A0 15 ERR#
3 DATA1 16 INIT#
4 DA TA2 17 SLIN#
5 DATA3 18 GND
6 DATA4 19 GND
7 DATA5 20 GND
8 DATA6 21 GND
9 DATA7 22 GND
10 ACK# 23 GN D
11 BUSY 24 G ND
12 PE 25 GND
13 SELECT
PIN DEFINITION
LPT
13
Parallel Port (25-pin Female)
1
25
14
CHAPTER 2 HARDWARE INSTALLATION
2-19
2.11 Mouse Connector: JKBMS1
The mainboard provides a standard PS/2® mouse mini DIN connector for
attaching a PS/2® mouse. You can plug a PS/2® mouse directly into this
connector. The connector location and pin definition are shown below:
2.12 Keyboard Connector: JKBMS1
The mainboard provides a standard PS/2® keyboard mini DIN connector for
attaching a keyboard. You can plug a keyboard cable directly to this
connector .
PS/2 Mouse (6-pin Female)
PS/2 Keyboard (6-pin Female)
Pin1
Mouse DATA
Pin6
NC
Pin2
NC
Pin4
VCC
Pin3
GND
Pin5
Mouse Clock
Pin1
KBD DATA
Pin6
NC
Pin2
NC
Pin3
GND
Pin5
KBD Clock
Pin4
VCC
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