AOpen MX59P-HW User Manual

Chapter 2

Hardware Installation

This chapter gives you a step-by-step procedure on how to install your system.
Follow each section accordingly.

Caution: Electrostatic discharge (ESD) can
damage your processor, disk drives, expansion
boards, and other components. Always
observe the following precautions before you
install a system component.

1. Do not remove a component from its
protective packaging until you are ready
to install it.

2. Wear a wrist ground strap and attach it to
a metal part of the system unit before
handling a component. If a wrist strap is
not available, maintain contact with the
system unit throughout any procedure
requiring ESD protection.

2-1

Hardware Installation

CPU FAN1

COM1

PRINTER

VGA

CDIN

JP14

JP4

COM2

JP7

JP12

2.1 Jumper and Connector Locations

The following figure shows the locations of the jumpers and connectors on the
system board:

MODEM CN

KB2

I
S

A

PANEL

WOL

P

P

P

C

C

I

I

3

4

P

C

I

2

IrDA

C

I

1

USB

DIMM1
DIMM2

PS/2 MS

2-2

WOM

FAN

BIOS

FDC

IDE2

IDE1

JP6

JP5

Hardware Installation

Jumpers:

SW1: DIP Switch for CPU voltage and clock ratio
JP4, JP5, CPU external clock
JP6, JP7
JP12: CPU I/O Voltage
JP14: Clear CMOS

Connectors:

PS2: PS/2 mouse connector
KB: PS/2 keyboard connector
COM1: COM1 connector
COM2: COM2 connector
PRINTER: Printer connector
PWR2: ATX power connector
USB: USB connector
FDC: Floppy drive connector
IDE1: IDE1 primary channel
IDE2: IDE2 secondary channel
VGA: VGA connector
CPUFAN1: CPU fan connector
CDUFAN2: CPU fan connector
FAN: Fan connector
IrDA: IrDA (Infrared) connector
PANEL: Front panel (Multifunction) connector
CD-IN: CD-audio connector
MODEM-CN: Mono in (Pin 1-2) and Mic out (Pin 3-4)
WOM: 0V Wake On Modem connector
WOL: Wake On LAN connector

2-3

Hardware Installation

3

3

2.2 Jumpers

Jumpers are made by pin headers and plastic connecting caps for the purpose
of customizing your hardware. Doing so requires basic knowledge of computer
hardware, be sure you understand the meaning of the jumpers before you
change any setting. The onboard jumpers are normally set to their default with
optimized settings.

On the mainboard, normally there is a bold line marked beside pin 1 of the
jumper, sometimes, there are numbers also. If we connect (short) plastic cap to
pin 1 and 2, we will say set it at 1-2, and when we say jumper is open, that
means no plastic cap connected to jumper pins.

Open

1
2

Short

1
2

Jumper set at 1-2

1
2

Jumper set at 2-3

1
2

For your convenience to install a CPU, this motherboard also use a DIP switch
to set CPU voltage and frequency ratio. The following figure simply shows you
how to set this DIP switch, please see also to next sections for more details.

ON

1 2 3 4 5 6 7 8

OFF ON

2-4

Hardware Installation

2.2.1 Setting the CPU Voltage

S4

ON
OFF
OFF
ON
OFF
OFF
ON
OFF

S5

ON
ON
OFF
OFF
OFF
OFF
ON
ON

S6

ON
ON
ON
OFF
OFF
ON
OFF
OFF

S7

ON
ON
ON
ON
ON
OFF
OFF
OFF

S8

OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

Vcore

3.52V

3.45V

3.2V

2.9V

2.8V

2.4V

2.3V

2.2V

SW1 is used to select CPU
core voltage (Vcore) and ratio,
there are totally eight switches
on the DIP. After installing
CPU, remember to set the
switch 4-8 to specify a proper
Vcore.

ON

1 2 3 4 5 6 7 8

3.2V

K6-233

ON

1 2 3 4 5 6 7 8

2.9V

K6-166/200 or M2

ON

1 2 3 4 5 6 7 8

3.52V

6x86 or K5

ON

1 2 3 4 5 6 7 8

3.45V

P54C

ON

1 2 3 4 5 6 7 8

3.3V

IDT C6

ON

1 2 3 4 5 6 7 8

2.8V

P55C (MMX)

ON

1 2 3 4 5 6 7 8

2.4V

K6-2 400/450 and K6-III

ON

1 2 3 4 5 6 7 8

2.2V

K6-266/300 or K6-2

2-5

Hardware Installation

The following table lists possible settings of current CPU available on the
market. Note that the correct setting may vary because of new CPU product,
please see to your CPU specification for more details.

CPU Type Vcore S4 S5 S6 S7 S8

INTEL P54C Single Voltage 3.45V OFF ON ON ON OFF
INTEL P55C Dual Voltage 2.8V OFF OFF OFF ON OFF
AMD K5 Single Voltage 3.52V ON ON ON ON OFF
AMD K6-166/200 Dual Voltage 2.9V ON OFF OFF ON OFF
AMD K6-233 Dual Voltage 3.2V OFF OFF ON ON OFF
AMD K6-266/300 Dual Voltage 2.2V OFF ON OFF OFF OFF
AMD K6-2 Dual Voltage 2.2V OFF ON OFF OFF OFF
AMD K6-2 400/450 Dual Voltage 2.4V OFF OFF ON OFF OFF
AMD K6-III Dual Voltage 2.4V OFF OFF ON OFF OFF
Cyrix 6x86 Single Voltage 3.52V ON ON ON ON OFF
Cyrix 6x86L Dual Voltage 2.8V OFF OFF OFF ON OFF
Cyrix M2 Dual Voltage 2.9V ON OFF OFF ON OFF
IDT C6 Single Voltage 3.52V

3.3VONONONOFFONONONON

Warning: This high performance MX59 Pro motherboard
that AOpen presented to you has a capability to overclock to
124MHz external clock while still conforming the design
guide from VIA. This overclock scheme is accomplished by
AOpen's technical expertise as well as manufacturing
capabilities. However, please understand that some of the
add-on cards might not work with this board properly when
overclock scheme is engaged. Please use designated
speed when you encountered such a problem.

Warning: Note that overclocking may cause thermal
problem. Please make sure that the cooling fan and the
heatsink were adequate to dissipate excessive heat that's
generated by overclocking the CPU.

OFF
OFF

2-6

Tip: Normally, for single voltage CPU, Vcpuio (CPU I/O

Voltage) is equal to Vcore, but for CPU that needs dual
voltage such as PP/MT (P55C) or Cyrix 6x86L, Vcpuio is
different from Vcore and must be set to Vio (PBSRAM and
Chipset Voltage). The single or dual voltage CPU is
automatically detected by hardware circuit.

Tip: For supporting more different CPUs in future, this
motherboard uses five switches to specify Vcore. There are

Hardware Installation

32 settings totally, and the range is from 1.3V to 3.5V.

This motherboard supports the CPU core voltage from 1.3V to 3.5V, that can
be applied to various CPUs in the future. For your reference, all settings are
listed in the following table.

Vcore

1.30V

1.35V

1.40V

1.45V

1.50V

1.55V

1.60V

1.65V

1.70V

1.75V

1.80V

1.85V

1.90V

1.95V

2.00V

2.05V

2.1V

2.2V

2.3V

2.4V

2.5V

2.6V

2.7V

2.8V

2.9V

3.0V

3.1V

3.2V

3.3V

3.4V

3.5V

S4

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON
ON
OFF

ON
OFF

ON
OFF

ON
OFF

ON
OFF

ON
OFF

ON
OFF

ON

S5

OFF
OFF

ON

ON
OFF
OFF

ON

ON
OFF
OFF

ON

ON
OFF
OFF

ON

ON

OFF

ON

ON
OFF
OFF

ON

ON
OFF
OFF

ON

ON
OFF
OFF

ON

ON

S6

OFF
OFF
OFF
OFF

ON
ON
ON

ON
OFF
OFF
OFF
OFF

ON

ON

ON

ON

OFF

OFF
OFF

ON

ON

ON

ON
OFF
OFF
OFF
OFF

ON

ON

ON

ON

S7

OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

ON
ON
ON
ON
ON
ON
ON
ON

OFF

OFF
OFF
OFF
OFF
OFF
OFF

ON
ON
ON
ON
ON
ON
ON
ON

S8

ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON

ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

2-7

Hardware Installation

2.2.2 Selecting the CPU Frequency

S1

OFF
ON
ON
OFF
ON
ON
OFF
OFF

S2

OFF
OFF
ON
ON
OFF
ON
ON
OFF

S3

CPU Frequency Ratio

OFF

1.5x (3.5x)

OFF

2x (6x, 3.33x)

OFF

2.5x (1.75x)

OFF

3x

ON

4x

ON

4.5x

ON

5x (2.33x)

ON

5.5x (2.66x)

Intel Pentium, Cyrix 6x86 and
AMD K5/K6 CPU are
designed to have different
Internal (Core) and External
(Bus) frequency. The ratio of
Core/Bus frequency is
selected by the switch 1-3 of
SW1.

Note: Intel PP/MT MMX 233MHz is using 1.5x jumper setting
for 3.5x frequency ratio, and AMD PR166 is using 2.5x setting
for 1.75x frequency ratio.

Core frequency = Ratio * External bus clock

ON

1 2 3 4 5 6 7 8

3x

ON

1 2 3 4 5 6 7 8

4x

2-8

ON

1 2 3 4 5 6 7 8

1.5x (3.5x)

ON

1 2 3 4 5 6 7 8

2x (6x, 3.33x)

ON

1 2 3 4 5 6 7 8

2.5x (1.75x)

ON

1 2 3 4 5 6 7 8

4.5x

ON

1 2 3 4 5 6 7 8

5x (2.33x)

ON

1 2 3 4 5 6 7 8

5.5x (2.66x)

Hardware Installation

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

CPU

2-3

2-3

2-3

1-2

60MHz

1-2

2-3

2-3

1-2

66.8MHz

2-3

1-2

2-3

1-2

70MHz

1-2

1-2

2-3

1-2

75MHz

2-3

2-3

2-3

2-3

75MHz

2-3

2-3

1-2

1-2

80MHz

1-2

2-3

2-3

2-3

80MHz

1-2

2-3

1-2

1-2

83.3MHz

2-3

1-2

2-3

2-3

83.3MHz

2-3

1-2

1-2

1-2

95.3MHz

1-2

1-2

1-2

1-2

100MHz

1-2

1-2

2-3

2-3

105MHz

2-3

2-3

1-2

2-3

110MHz

1-2

2-3

1-2

2-3

115MHz

2-3

1-2

1-2

2-3

120MHz

1-2

1-2

1-2

2-3

124MHz

JP4, JP5, JP6 and JP7 are the selections of CPU external clock (bus clock)
and PCI Clock.

PCI

30MHz

33.4MHz
35MHz
25MHz

37.5MHz

28.7MHz
40MHz

27.7MHz

41.7MHz

31.6MHz

33.3MHz
35MHz

36.7MHz

38.3MHz
40MHz

41.3MHz

JP4, JP5 and JP6 are
the selections of CPU
external clock (bus
clock), which is actually
the clock from clock
generator.

CPU:60MHz;

PCI:30MHz

CPU:66.8MHz;

PCI:33.4MHz

CPU:70MHz;

PCI:35MHz

CPU:75MHz;

PCI:25MHz

CPU:75MHz;

PCI:37.5MHz

CPU:80MHz;

PCI:28.5MHz

2-9

Hardware Installation

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

JP4

JP5

JP6

JP7

CPU:80MHz;

PCI:40MHz

CPU:83.3MHz;

PCI:27.7MHz

CPU:83.3MHz;

PCI:41.7MHz

CPU:95.3MHz;

PCI:31.6MHz

CPU:100MHz;

PCI:33.3MHz

CPU:105MHz;

PCI:35MHz

CPU:110MHz;

PCI:36.7MHz

CPU:115MHz;

PCI:38.3MHz

CPU:120MHz;

PCI:40MHz

CPU:124MHz;

PCI:41.3MHz

2-10

Warning: VIA MVP4 chipset supports maximum 100MHz

external CPU bus clock, the higher settings are for internal test
only, selecting these settings exceeds the specification of

MVP4 chipset, which may cause serious system damage.
Warning: While 100/105/110/112/115/120/124MHz is selected,

we strongly recommend choosing PC100 SDRAM for system
stability.

Hardware Installation

Caution: The following table lists possible settings of current
CPU available on the market. The correct setting may vary
because of new CPU product, refer to your CPU specification for
more details.

INTEL
Pentium

P54C 100 100MHz = 1.5x 66MHz OFF OFF OFF 1-2 & 2-3 & 2-3 & 1-2
P54C 133 133MHz = 2x 66MHz ON OFF OFF 1-2 & 2-3 & 2-3 & 1-2
P54C 166 166MHz = 2.5x 66MHz ON ON OFF 1-2 & 2-3 & 2-3 & 1-2
P54C 200 200MHz = 3x 66MHz OFF ON OFF 1-2 & 2-3 & 2-3 & 1-2

INTEL
Pentium
MMX

PP/MT 166 166MHz = 2.5x 66MHz ON ON OFF 1-2 & 2-3 & 2-3 & 1-2
PP/MT 200 200MHz = 3x 66MHz OFF ON OFF 1-2 & 2-3 & 2-3 & 1-2
PP/MT 233 233MHz = 3.5x 66MHz OFF OFF OFF 1-2 & 2-3 & 2-3 & 1-2

Cyrix 6x86
& 6x86L

P166+ 133MHz = 2x 66MHz ON OFF OFF 1-2 & 2-3 & 2-3 & 1-2
P200+ 150MHz = 2x 75MHz ON OFF OFF 1-2 & 1-2 & 2-3 & 1-2

Cyrix M2 CPU Core

MX-PR200 166MHz =

MX-PR233 200MHz =

MX-PR266 233MHz = 3.5x 66MHz OFF OFF OFF 1-2 & 2-3 & 2-3 & 1-2
MX-PR300 225MHz=

CPU Core
Frequency

CPU Core
Frequency

CPU Core
Frequency

Frequency

150MHz=

166MHz=3x2x

233MHz=3x3.5x

Ratio External

Ratio External

Ratio External

Ratio External

2.5x2x66MHz

Bus Clock

Bus Clock

Bus Clock

Bus Clock

75MHz
66MHz

83.3MHz

75MHz
66MHz

S1 S2 S3 JP4,JP5,JP6,JP7

S1 S2 S3 JP4,JP5,JP6,JP7

S1 S2 S3 JP4,JP5,JP6,JP7

S1 S2 S3 JP4,JP5,JP6,JP7

ONONON

OFFONON

OFF
OFFONOFF

OFF

OFF

OFF

1-2 & 2-3 & 2-3 & 1-2

OFF

1-2 & 1-2 & 2-3 & 1-2

OFF

1-2 & 2-3 & 2-3 & 1-2

OFF

1-2 & 2-3 & 1-2 & 1-2

OFF

1-2 & 1-2 & 2-3 & 1-2

OFF

1-2 & 2-3 & 2-3 & 1-2

IDT C6 CPU Core

Frequency

C6-150 150MHz = 2x 75MHz ON OFF OFF 1-2 & 1-2 & 2-3 & 1-2
C6-200 200MHz = 3x 66MHz OFF ON OFF 1-2 & 2-3 & 2-3 & 1-2

AMD K5 CPU Core Ratio External S1 S2 S3 JP4,JP5,JP6,JP7

Ratio External

Bus Clock

S1 S2 S3 JP4,JP5,JP6,JP7

2-11

Hardware Installation

Frequency Bus Clock

PR100 100MHz = 1.5x 66MHz OFF OFF OFF 1-2 & 2-3 & 2-3 & 1-2
PR133 100MHz = 1.5x 66MHz OFF OFF OFF 1-2 & 2-3 & 2-3 & 1-2
PR166 116MHz = 1.75x 66MHz ON ON OFF 1-2 & 2-3 & 2-3 & 1-2

AMD K6 CPU Core

Frequency

K6-166 166MHz = 2.5x 66MHz ON ON OFF 1-2 & 2-3 & 2-3 & 1-2
K6-200 200MHz = 3x 66MHz OFF ON OFF 1-2 & 2-3 & 2-3 & 1-2
K6-233 233MHz = 3.5x 66MHz OFF OFF OFF 1-2 & 2-3 & 2-3 & 1-2
K6-266 266MHz= 4x 66MHz ON OFF ON 1-2 & 2-3 & 2-3 & 1-2
K6-300 300MHz= 4.5x 66MHz ON ON ON 1-2 & 2-3 & 2-3 & 1-2

AMD K6-2 CPU Core

Frequency

K6-2 300 300MHz 3x 100MHz OFF ON OFF 1-2 & 1-2 & 1-2 & 1-2
K6-2 333 333MHz 3.5x 95MHz OFF OFF OFF 2-3 & 1-2 & 1-2 & 1-2
K6-2 350 350MHz 3.5x 100MHz OFF OFF OFF 1-2 & 1-2 & 1-2 & 1-2
K6-2 366 366MHz 5.5x 66MHz OFF OFF ON 1-2 & 2-3 & 2-3 & 1-2
K6-2 380 380MHz 4x 95MHz ON OFF ON 2-3 & 1-2 & 1-2 & 1-2
K6-2 400 400MHz 4x 100MHz ON OFF ON 1-2 & 1-2 & 1-2 & 1-2
K6-2 450 450MHz 4.5x 100MHz ON ON ON 1-2 & 1-2 & 1-2 & 1-2
K6-2 475 475MHz 5x 95MHz OFF ON ON 2-3 & 1-2 & 1-2 & 1-2
K6-III 400 400MHz 4x 100MHz ON OFF ON 1-2 & 1-2 & 1-2 & 1-2
K6-III 450 450MHz 4.5 100MHz ON ON ON 1-2 & 1-2 & 1-2 & 1-2

Ratio External

Bus Clock

Ratio External

Bus Clock

S1 S2 S3 JP4,JP5,JP6,JP7

S1 S2 S3 JP4,JP5,JP6,JP7

Note: Cyrix 6x86, 6x86MX (M2) and AMD K5 CPU use P-rating for
the reference of CPU benchmark compared with INTEL P54C, their
internal core frequency is not exactly equal to P-rating marked on
the CPU. For example, Cyrix P166+ is 133MHz but performance is
almost equal to P54C 166MHz and AMD PR133 is 100MHz but
performance is almost equal to INTEL P54C 133MHz.

2-12

2.2.3 Clearing the CMOS

Hardware Installation

JP14

1-2
2-3

The procedure to clear CMOS:

1. Turn off the system and unplug the AC power.

2. Remove ATX power cable from connector PWR2.

3. Locate JP14 and short pins 2-3 for a few seconds.

4. Return JP14 to its normal setting by shorting pins 1-2.

5. Connect ATX power cable back to connector PWR2.

6. Turn on the system power.

7. Press during bootup to enter the BIOS Setup Utility and specify a

Clear CMOS

Normal operation (default)
Clear CMOS

new password, if needed.

You need to clear CMOS if you forget
your system password. To clear the
CMOS, follow the procedures listed
below:

JP14

1
2

Normal Operation

(default)

JP14

1
2

Clear CMOS

2-13

Hardware Installation

2.2.4 I/O Voltage

JP12

1-2
2-3

I/O Voltage

3.32V

3.45V

JP12 is reserved for testing purposes only. This
jumper enables you to set the voltage of the onboard
chipset and PBSRAM (Vio). For dual-voltage CPU,
JP12 also functions as CPU I/O voltage (Vcpuio)
controller.

JP12

1 2 3

3.32V

JP12

1 2 3

3.45 V

2-14

Hardware Installation

+5V

5V SB

3.3V

+12V

SENSE

GND

+12V

2.3 Connectors

2.3.1 Power Cable

The ATX power supply uses 20-pin connector shown below. Make sure you
plug in the right direction.

Caution: Make sure that the power supply is off before
connecting or disconnecting the power cable.

+5V

3.3V

PWR2

2.3.2 Fan Connectors

The CPU fan connectors are marked as CPUFAN1 and CPUFAN2 on the
system board. You can plug the CPU fan cable to both the 2-pin fan
connector CPUFAN2 and the 3-pin fan connector CPUFAN1. And FAN
connector can be used to connect housing fan. Note that only CPUFAN1 and
FAN support the fan monitoring function, because 3-pin fan has an extra pin
called SENSE, which periodically sends fan signal out.

CPUFAN1 & FAN

GND

CPUFAN2

2-15

Hardware Installation

PS/2 Mouse

PS/2 KB

2.3.3 PS/2 Mouse

The onboard PS/2 mouse connector is a 6-pin Mini-Din connector marked
PS2. The view angle of drawing shown here is from back panel of the
housing.

PCB

2.3.4 Keyboard

The onboard PS/2 keyboard connector is a 6-pin Mini-Din connector marked
KB2. The view angle of drawing shown here is from back panel of the
housing.

2-16

PCB

Hardware Installation

COM1

1

2.3.5 VGA (AGP)

2.3.5 Serial Devices (COM1)

The onboard serial connector COM1 is a 9-pin D-type connector on the back
panel of the mainboard.

PCB

2.3.6 Serial Devices (COM2)

Plug in the 10-pin flat cable to the COM2 connectors.

2

COM2

10

9

2.3.7 Printer

The onboard printer connector is a 25-pin D-type connector marked PRINTER.
The view angle of drawing shown here is from back panel of the housing.

2-17

Hardware Installation

PRINTER

USB

34

33

PCB

2.3.8 USB Device

You can attach USB devices to the USB connector. The motherboard
contains two USB connectors, which are marked as USB.

PCB

2.3.9 Floppy Drive

Connect the 34-pin floppy drive cable to the floppy drive connector marked as

FDC on the system board.

2

1

FDC

2-18

Hardware Installation

1

40

2

39

1

40

2

39

2.3.10 IDE Hard Disk and CD ROM

This mainboard supports two 40 pin IDE connectors marked as IDE1 and
IDE2. IDE1 is also known as primary channel and IDE2 as secondary channel,

each channel supports two IDE devices that makes total of four devices.
In order to work together, the two devices on each channel must be set

differently to master and slave mode, either one can be hard disk or CDROM.
The setting as master or slave mode depends on the jumper on your IDE
device, please refer to your hard disk and CDROM manual accordingly.

Connect your first IDE hard disk to master mode of the primary channel. If you
have second IDE device to install in your system, connect it as slave mode on
the same channel, and the third and fourth device can be connected on
secondary channel as master and slave mode respectively.

IDE2

IDE1

Caution: The specification of IDE cable is
maximum 46cm (18 inches), make sure your
cable does not excess this length.

Caution: For better signal quality, it is
recommended to set far end side device to
master mode and follow the suggested
sequence to install your new device. Please
refer to the following figure.

2-19

Hardware Installation

(3rd)

(4th)

1

11

10

20

+++

+

+

+

IDE2 (Secondary Channel)

2.3.11 Panel Connector

The Panel (multifunction) connector is
a 20-pin connector marked as PANEL
on the board. Attach the power LED,
keylock, speaker, SPWR, IDE LED and
reset switch to the corresponding pins
as shown in the figure.

If your ATX housing supports ACPI
specification, the ACPI & Power the
LED will keep flashing if you have
enabled “suspend mode” item in the
BIOS Setup.

Slave

IDE1 (Primary Channel)

Slave
(2nd)

1

GND

NC

+5V
IDE LED
IDE LED

+5V

+5V

GND

NC

SPEAKER

10 20

Master

Master

(1st)

11

SPWR
GND
ACPI & POWER LED
GND

+5V

NC
NC
GND
RESET
GND

PANEL

2-20

Keylock

IDE LED

Speaker

SPWR

ACPI &
Power LED

Reset

PANEL

Hardware Installation

2.3.12 IrDA Connector

The IrDA connector can be configured to support wireless infrared module,
with this module and application software such as Laplink or Win95 Direct
Cable Connection, user can transfer files to or from laptops, notebooks, PDA
and printers. This connector supports HPSIR (115.2Kbps, 2 meters), ASK-IR
(56Kbps) and Fast IR (4Mbps, 2 meters).

Install infrared module onto IrDA
connector and enable infrared function
from BIOS setup, make sure to have
correct orientation when you plug onto
IrDA connector.

Pin

1
2
3
4
5
6

IrDA

2.3.13 CD Audio Connector

This connector is used to connect CD audio cable.

1
2
3
4

Description

+5V
NC
IRRX
GND
IRTX
NC

1
2
3
4
5
6

CDIN

2-21

Hardware Installation

2.3.14 Mono In/Mic Out Connector

This connector is used to connect Mono In/Mic Out
connector of an internal modem card. The pin 1-2 is
Mono In, and the pin 3-4 is Mic Out. Please note
that there is no standard for this kind of connector
yet, only some internal modem cards implement this
connector.

Please see the pin definitions to connect the cable.

1
2
3
4

Mono In/Mic Out

2.3.15 Wake on Modem Connector

This mainboard implements special circuit to support
Wake on Modem, both Internal Modem Card (AOpen
MP56) and external box Modem are supported. Since
Internal Modem card consumes no power when system
power is off, it is recommended to use Internal Modem.
To use AOpen MP56, connect 4-pin cable from RING
connector of MP56 to WOM connector on the
mainboard.

Pin

1
2
3
4

Description

Mono In
GND
GND
Mic Out

Pin

1
2
3
4

Description

+5V SB
NC
RING
GND

2-22

1
2
3
4

WOM

Hardware Installation

2.3.16 Wake on LAN Connector

This mainboard implements a WOL connector. To
implement Wake on LAN, you need a network card that
supports this feature. In addition, you also need to install
a network management software.

1
2
3

WOL

Pin

1
2
3

Description

+5V SB
GND
LID

2-23

Hardware Installation

Pin 1

168

2.4 Configuring the System Memory

This mainboard has two 168 pin
DIMM sockets (Dual-in-line
Memory Module) that allow you to
install system memory up to
512MB.

The DIMM supported by this motherboard are always 64-bit wide SDRAM,
which can be identified by the following factors:

I. Size: single side, 1Mx64 (8MB), 2Mx64 (16MB), 4Mx64 (32MB), 8Mx64

(64MB), 16Mx64 (128MB), and double side, 1Mx64x2 (16MB), 2Mx64x2
(32MB), 4Mx64x2 (64MB), 8Mx64x2 (128MB).

Tip: Here is a trick to check if your DIMM is
single-side or double-side -- if there are traces
connected to golden finger pin 114 and pin 129 of
the DIMM, the DIMM is probably double-side;
otherwise, it is single-side. The following figure is
for your reference.

Pin 129

II. Speed: Normally marked as -12, which means the clock cycle time is 12ns

and maximum clock of this SDRAM is 83MHz. Sometimes you can also find
the SDRAM marked as -67, which means maximum clock is 67MHz.

III. Buffered and non-buffered: This motherboard supports non-buffered

DIMMs. You can identify non-buffered DIMMs and buffered DIMMs
according to the position of the notch, the following figure is for your
reference:

2-24

Pin 114

Hardware Installation

Reserved

non-buffered

buffered

Because the positions are different, only non-buffered DIMMs can be
inserted into the DIMM sockets on this motherboard. Although most of
DIMMs on current market are non-buffered, we still suggest you to ask your
dealer for the correct type.

IV. 2-clock and 4-clock signals: Although both of 2-clock and 4-clock signals

are supported by this motherboard, we strongly recommend choosing a 4­clock SDRAM in consideration of reliability.

Tip: To identify 2-clock and 4-clock SDRAM, you
may check if there are traces connected to golden
finger pin 79 and pin 163 of the SDRAM. If there are
traces, the SDRAM is probably 4-clock; Otherwise, it
is 2-clock.

V. Parity: This motherboard supports standard 64 bit wide (without parity) and

72-bit wide (with parity) DIMM modules.

There is no jumper setting required for the memory size or type. It is
automatically detected by the system BIOS. This motherboard supports
maximum 512MB system memory.

DIMM1 Size of DIMM1 DIMM2 Size of DIMM2

None 0MB None 0MB
8MB 8MB 8MB 8MB
16MB 16MB 16MB 16MB
32MB 32MB 32MB 32MB
64MB 64MB 64MB 64MB
128MB 128MB 128MB 128MB

Total Memory Size = Size of DIMM1 + Size of DIMM2

Caution: There are some old DIMMs made by EDO or
FPM memory chip, they can only accept 5V power and
probably can not fit into the DIMM socket, make sure you
have 3.3V true SDRAM DIMM before your insert it.

2-25

Hardware Installation

The driving capability of new generation chipset is limited because the lack of
memory buffer (to improve performance). This makes DRAM chip count an
important factor to be taking into consideration when you install SIMM.
Unfortunately, there is no way that BIOS can identified the correct chip count,
you need to calculate the chip count by yourself. The simple rule is: By visual
inspection, use only SIMM with chip count less than 24 chips.

There is an important parameter affects SDRAM performance, CAS Latency
Time. It is similar as CAS Access Time of EDO DRAM and is calculated as
number of clock state. The SDRAM that AOpen had tested are listed below. If
your SDRAM has unstable problem, go into BIOS "Chipset Features Setup",
change CAS Latency Time to 3 clocks.

Manufacturer Model Suggested CAS

Latency Time

Samsung KM416511220AT-G12 2 Yes
NEC D4S16162G5-A12-7JF 2 No
Hitachi HM5216805TT10 2 No
Fujitsu 81117822A-100FN 2 No
TI TMX626812DGE-12 2 Yes
TI TMS626812DGE-15 3 Yes
TI TMS626162DGE-15 3 Yes
TI TMS626162DGE-M67 3 Yes

5V Tolerance

2-26

Hardware Installation

The following table lists the recommended DRAM combinations:

DIMM
Data chip

1M by 16 1Mx64 x1 4 8MB Yes
1M by 16 1Mx64 x2 8 16MB Yes
2M by 8 2Mx64 x1 8 16MB Yes
2M by 8 2Mx64 x2 16 32MB Yes
4M by 16 4Mx64 x2 8 64MB Yes
4M by 16 4Mx64 x1 4 32MB Yes
8M by 8 8Mx64 x1 8 64MB Yes
8M by 8 8Mx64 x2 16 128MB Yes

DIMM
Data chip

2M by 32 2Mx64 x1 2 16MB Yes, but not

2M by 32 2Mx64 x2 4 32MB Yes, but not

Bit size
per side

Bit size
per side

Single/
Double side

Single/
Double side

Chip count DIMM size Recommended

Chip count DIMM size Recommended

tested.

tested.

The following table lists possible DRAM combinations that is NOT
recommended:

DIMM
Data chip

4M by 4 4Mx64 x1 16 32MB No
4M by 4 4Mx64 x2 32 64MB No
16M by 4 16Mx64 x1 16 128MB No

Bit size
per side

Single/
Double side

Chip count DIMM size Recommended

2-27