Contents
Chapter 1
Introduction .........................................................1
1-1 Features......................................................................2
1-2 Unpacking ...................................................................3
1-3 Electrostatic Discharge Precautions ........................4
1-4 Mainboard Layout ......................................................5
Chapter 2
Setting Up the Main Board.................................7
2-1 Quick Setup .............................................................7
2-2 Installing a CPU Upgrade........................................8
Installing a CPU: Overview................................................9
Installing a CPU in the ZIF Socket ...................................10
2-3 Installing Memory..................................................10
Installing DRAM...............................................................11
Install SRAM Cache Memory...........................................12
2-4 Making Connections .............................................13
CN2: Secondary IDE Connector......................................13
CN3: Primary IDE Connector...........................................13
JP1: External Battery Connector .....................................13
JP4: The Keyboard Connector ........................................13
JP5: The Power Supply Connector..................................13
JP27: Speaker Connector ...............................................14
JP33: IDE Active LED Connector....................................14
JP35: Standby Mode Switch Connector ..........................14
JP36: Power-Saving Output Signal Connector.....................14
JP37: Turbo LED Connector............................................15
i
JP38: Reset Connector ...................................................15
JP40: Keylock & Power LED Connector..........................15
LED1: Power-Saving LED Connector..............................15
2-5 Replacing the Lithium Battery..............................15
Chapter 3
Setting Jumper Switches.....................................16
JP2 & JP3: Clear BIOS Setup Data................................17
JP6: Monochrome/Color Monitor ..................................17
JP7 & JP8: Cache Memory Configuration ....................18
JP11 & JP12: CPU Clock Speed....................................18
JP13: Factory Preset......................................................19
JP19: BIOS Type.............................................................19
JP31, JP32, & JP34: CPU Voltage .................................20
Select CPU type, Clock, Voltage....................................21
JP39: Turbo Switch ........................................................24
Appendix: Connector Pin Signals.........................25
CN1: Printer Connector...................................................25
CN2: Secondary IDE and CN3: Primary IDE...................26
CN4: Floppy Disk Drive Connector..................................27
CN5: COMA Port and CN6: COMB Port..........................27
JP4: The Keyboard Connector ........................................28
JP5: The Power Supply Connector..................................28
JP27: Speaker Connector ...............................................28
JP33: IDE Active LED......................................................29
JP37: Turbo LED Connector............................................29
JP40: Keylock & Power LED Connector..........................29
LED1: Power-Saving LED Connector..............................29
Jumper Switches and Functions List ...........................30
ii
iii
Chapter 1
Introduction
Your 80486 PCI main board is a full-featured IBM PC/AT™-compatible
board offering a unique modular architecture that lets you upgrade the
system by simply replacing the CPU. The board supports the PCI local
bus and the following high-performance CPUs:
• Intel/AMD 486DX/DX2/DX4
• Intel 486SX
• Intel SL SX and Intel SL DX/DX2/DX4
• Intel P24T and P24D
• Cyrix 486DX/DX2/DX4/Cyrix 5x86
• UMC 486
• AMD Enhanced DX2/DX4 Writeback/Am5x86
• AMD Enhanced SX Writeback
The main board is fully compatible with the thousands of software
applications developed for IBM PC/AT™-compatible computers. The
control logic provides high-speed performance for the most advanced
multi-user, multitasking applications available today.
The board's high-performance 32- or 64-bit Peripheral Component
Interconnect (PCI) local bus lets you add highly integrated peripheral
controller components, peripheral add-in boards, and processor/memory systems. The Industry Standard Architecture (ISA) bus
slots allow you to choose from thousands of 8- and 16-bit
industry-standard add-on boards. A floppy disk drive controller, IDE
hard disk drive controller, serial ports (16550), and parallel port (with
EPP and ECP modes) are included so that you can easily connect
peripheral devices without using expansion slots. In addition, an IDE
hard disk drive controller is included so that you can connect up to four
IDE hard disk drives.
1
The board supports up to 128MB of on-board DRAM memory. Best of all,
it automatically detects installed memory modules, so it is not necessary
to configure memory with jumper switches. It also offers optional SRAM
cache memory (128KB, 256KB) to reduce the number of wait states
caused by low-speed I/O devices.
1-1 Features
• High-speed upgradeable CPU
• Selectable CPU voltage: 3.3V, 3.45V, 4.0V, and 5.0V
• On-board clock generator lets you change CPU speed by
jumper switch (you don’t have to change the oscillator)
• ZIF (Zero-Insertion Force) CPU socket
• Three master PCI local bus slots (rev. 2.0)
• Three 16-bit input/output (I/O) expansion slots
• Auto-detection of installed DRAM memory: no configuration is
necessary
• Optional 128KB, 256KB SRAM cache memory
• On-board Intelligent Drive Electronics (IDE) hard disk drive con-
troller: supports Mode 3 and Mode 4 hard disk drives
• On-board peripheral ports:
– Two on-board serial ports (16550)
– Parallel port with bi-directional lines: supports Enhanced
Parallel Port (EPP) and Extended Capabilities Port (ECP)
• On-board floppy disk drive controller
• Licensed Award BIOS
• Selectable BIOS type: EPROM, 5V flash memory, or 12V flash
memory
• Lithium coin battery
2
• Shadow RAM for ROM BIOS and video ROM to improve system
performance
• Hardware "green" function
1-2 Unpacking
The main board comes securely packaged in a sturdy cardboard
shipping carton. In addition to this User's Guide, the shipping carton
contains:
• The main board
• Cables: IDE, FDD, serial, and parallel port
• IDE Drivers distribution floppy disk: includes drivers for Windows
3.1, Windows NT 3.x, OS/2 2.x, and Novell Netware.
If any of these items is missing or damaged, contact the dealer from
whom you purchased the main board. Save the shipping materials and
carton in case you want to ship or store the board in the future.
NOTE: Leave the main board in its original packing until you are ready to
install it.
Inside the carton, the main board is sandwiched between sheets of
sponge and packed in an anti-static bag. After you unpack the board,
inspect it for damage. Press down all the integrated circuits to make
sure they are properly seated in their sockets. Do not apply power to the
board if it appears to have been damaged.
3
1-3 Electrostatic Discharge
Precautions
Make sure you ground yourself before handling the mainboard or other
system components. Electrostatic discharge can easily damage the
components. Note that you must take special precaution when
handling the mainboard in dry or air-conditioned environments.
Abide by the precautions below to protect your equipment from electrostatic discharge:
• Do not remove the anti-static packaging until you are ready to
install the mainboard and other system components.
• Ground yourself before removing any system component from
its protective anti-static packaging.
• You can ground yourself by grasping the expansion slot covers
or other unpainted portions of the computer chassis.
• Frequently ground yourself while working, or use a grounding
strap.
• Handle the mainboard by the edges and avoid touching its
components.
4
5
GT
1-4 Mainboard Layout
SMC
FDC37C665
Figure 1. The main board layout
6
The jumper switches and their functions are listed in the table below.
Jumper Function
JP2 & JP3 Clear BIOS Setup Data
JP6 Monochrome/Color Selection
JP7 & JP8 Cache Size Selection
JP9 & JP10
JP14-JP17
JP20-JP21 CPU Type Selection
JP23-JP26
JP28-JP30
JP11 & JP12 Clock Speed Selection
JP13 [Factory Preset: Testing Purposes Only]
JP19 BIOS Type Selection
JP31, JP32, & JP34 CPU Voltage Selection
7
Chapter 2
Setting Up the Main Board
This chapter describes getting your main board ready for operation. It
includes instructions for:
Installing a CPU upgrade
Installing DRAM memory and SRAM cache memory
It also provides descriptions of making board connections and replacing
the lithium battery.
2-1 Quick Setup
The flowchart below is a summary of the procedures that you will follow
to install and set up the main board in your computer system.
Install a CPU in the
1
ZIF socket
5
Make connections
Choose the CPU voltage,
2
type, and speed
6
Turn on the power & press
<DEL> to enter BIOS Setup
Install SIMMs in sockets
Make sure the cache
size configuration
3
4
is correct
7
Load Setup default values
& enalbe HDD Type
Auto Detect
8
Save changes & exit BIOS
Setup
8
2-2 Installing a CPU Upgrade
You can upgrade your main board by simply replacing the CPU and
changing the settings of jumper switches on the board. The board
supports the following high-performance CPUs:
Intel/AMD 486DX/DX2/DX4
Intel 486SX
Intel SL SX and Intel SL DX/DX2/DX4
Intel P24T and P24D
Cyrix 486 DX/DX2/DX4/5x86
UMC 486
AMD Enhanced DX2/DX4 Writeback/Am5x86
AMD Enhanced SX Writeback
9
Installing A CPU: Overview
The flowchart below illustrates the procedures that you will follow to
install a CPU.
Install the CPU in the
ZIF socket
Select CPU voltage:
3.3V,3.45V,4.0V, or 5.0V
(JP31, JP32 & JP34)
WARNING:
Selecting the wrong voltage may
severely damage your CPU.
(JP9-JP10, JP14-JP17, JP20-JP21,
Select the CPU type
JP23-JP26, & JP28-JP39)
Select the CPU speed
(JP11 & JP12)
10
Installing A CPU in the ZIF Socket
If there is already a CPU in the ZIF socket, remove it by pulling the
ZIF socket lever out to the side and then raising it. Then lift out the
CPU.
CAUTION: Static electricity can cause serious damage to integrated
circuit chips. Avoid building up a static electricity charge
in your body by touching a grounded object before you
touch the chips and at frequent in tervals as you handle the
chips.
Install a CPU in the ZIF socket as follows:
1. Turn off the system.
2. Find the ZIF socket. Refer to Figure 1, “The main board
layout,” for the location of ZIF socket on the board.
3. Raise the ZIF socket lever by pulling it out to the side and then
pulling up.
4. Align the pin 1 corners of the CPU and the ZIF socket and
place the CPU in the socket.
5. Press the ZIF socket lever down. The socket plate will slide
forward. When the CPU is installed fully, the ZIF socket lever
should snap into place.
2-3 Installing Memory
The main board uses two types of Random-Access memory:
Dynamic Random-Access Memory (DRAM) packaged in Single
In-Line Memory Modules (SIMMs). These modules occupy
sockets on the main board and provide a total of from 1MB to
128MB of on-board system memory.
Static Random-Access Memory (SRAM). These optional memory
11
chips occupy sockets on the main board and provide 128KB,
256KB of cache memory.
Installing DRAM
The main board provides a variety of possible DRAM configurations.
The board has four SIMM sockets; each socket can accept a 1MB,
4MB, 8MB, 16MB or 32MB SIMM. Depending on the desired
memory capacity and the SIMM size, you can install one, two, or four
SIMMs on the board.
The board accepts combinations of SIMMs with different sizes;
furthermore, you can install SIMM in any socket. The main board
automatically detects installed SIMMs; no configuration via jumper
switches or BIOS setup is necessary.
Install a SIMM into an on-board socket as follows:
1. Turn off the system.
2. Align the SIMM so that the pin 1 marking corresponds to the
SIMM socket pin 1 marking. The SIMM can fit in the socket in
one way only; you cannot insert the SIMM incorrectly.
3. Holding the SIMM at about a 15-degree angle to the board,
insert the SIMM‘s “golden finger” connectors into the socket.
4. Firmly press down on both sides of the SIMM so that it snaps
into the locking tabs at either end of the SIMM socket. You
will hear a click when the SIMM snaps into place. A retainning
peg at each end of the socket fits into a hole on the SIMM.
To remove a SIMM from a socket, carefully pry the tab away from
each end of the SIMM. The SIMM should fall back to an angle; you
can then pull the SIMM from the socket.
12
Installing SRAM Cache Memory
The main board has sockets for 128KB, 256KB of SRAM cache
mrmory.
CAUTION: Static electricity can cause serious damage to integrated
circuit chips. Avoid building up a static electricity charge
in your body by touching a grounded object before you
touch the chips and at frequent in tervals as you handle the
chips.
Install SRAM cache memory chips in on-board sockets as
follows:
1. Turn off the system.
2. Find the on-board sockets in which you will install the Sram
chips and determine which type of chips to install.
Refer to Figure1, “The main board layout,” for the location of
SRAM sockets on the board. The description of jumper
switches JP7-JP8 later in this chapter lists the type of chips to
install for each memory canfiguration.
3. Align the chip so that the pin 1 notch on the chip corresponds to
the notch on the appropriate board socket.
NOTE: The 32Kx8 SRAM chips have fewer pins than the board sockets.
When installing these chips, make sure that the four pins at the
pin 1 end of the socket are exposed.
4. Carefully but firmly press the chip into the socket, applying even
pressure to both ends of the chip.
5. Repeat steps 3 and 4 for each SRAM chip.
13
6. Set jumpers JP7-JP8 to choose 128KB, 256KB of installed
SRAM cache memory.
2-4 Making Conncetions
This section describes some of the connectors on the main board. See
Figure 1 for the location of the connectors on the board. Refer to the
appendix for a listing of the connectors‘ pin signals.
CAUTION: Before making connections on the board, make sure that the
power to the system is turned off.
CN2: Secondary IDE Connector
Attach the cable for the primary IDE hard disk drive to this connector.
Make sure that the red stripe on the cable corresponds to pin 1 of the
connector.
CN3: Primary IDE Connector
Attach the cable for the secondary IDE hard disk drive to this
connector. Make sure that the red stripe on the cable corresponds
to pin 1 of the connector.
JP1: External Battery Connector
Attach an external battery to this connector. Using an external
battery helps conserve the on-board battery.
JP4: The Keyboard Connector
Attach a keyboard to this five-pin female DIN keyboard connector.
14
JP5: The Power Supply Connector
The power supply connector consists of two six-pin male components.
Plug the dual connectors from the power supply to this connector.
JP27: Speaker Connector
Attach an external system speaker to this connector.
JP33: IDE Active LED Connector
This connector is usually attached to the LED indicator on the front of
an IDE hard disk drive. The IDE LED lights when the disk drive is
active.
JP35: Standby Mode Switch Connector
This connector is usually connected by a lead to a push button on the
front of the system case. Press the button to enter the
power-saving standby mode.
JP36: Power-Saving Output Signal Connector
This connector specifies that, for the selected power-saving mode,
the voltage level will go from high to low when the system enters the
selected mode. When the system wakes up, the voltage level goes
from low to high.
Signal JP36 Voltage Level
Enter Doze Mode
Enter Suspend Mode
7 1
8 2
7 1
8 2
15 16
High --> Low
High --> Low
Enter Standby Mode
7 1
8 2
High --> low
JP37: Turbo LED Connector
This connector is usually connected by a lead to a Turbo LED
indicator on the front of the system case. The indicator lights during
high-speed operation.
JP38: Reset Connector
This connector is usually connected by a lead to a system reset
button on the front of the system case. Press this button to restart
the computer without turning the power off.
JP40: Keylock & Power LED Connector
These connectors are usually connected by leads to a keyboard lock
and power LED indicator on the front of the system case. A key
provided with the case lets you electronically disconnect the
keyboard from the main board. The power LED lights when the
system is turned on.
LED1: Power-Saving LED Connector
This connector is usually connected by a lead to an LED on the front
of the system case. When the system enters power-saving mode,
the LED will light.
2-5 Replacing the Lithium Battery
The main board‘s Lithium 2032 “coin” battery provides long-lasting,
leakproof power for CMOS memory. Unlike other types of batteries,
the Lithium battery will not release chemicals that may damage the
board. The Lithium battery is not rechargeable, but replacements are
readily available at convenience stores, supermarkets, and camera
shops. In addition, replacements are easily installed.
Chapter 3
Setting Jumper Switches
You can configure the operating characteristics of the main board by
setting jumper switches on the board. This chapter presents a detailed
description of the jumper switches. Refer to Figure 1 in Chapter 1 for
the positions of the jumpers on the board.
A jumper switch is closed (sometimes referred to as ‘shorted’) with the
plastic cap inserted over two pins of the jumper. A jumper is open with
the plastic cap inserted over one or no pin(s) of the jumper.
NOTE: When a jumper is open, keep the plastic cap inserted over one
pin of the jumper so that you don’t lose it.
17
JP2 & JP3: Clear BIOS Setup Data (BLACK color selector)
These jumpers let you clear the BIOS setup data stored in CMOS
memory.
NOTE: We recommend that only experienced technicians attempt to use
Maintain BIOS setup data in
CMOS memory
Clear BIOS setup data
these jumpers to clear BIOS setup data.
BIOS Setup Data JP3 JP2
JP6: Monochrome/Color Monitor
(BLACK color selector)
This jumper lets you choose between a color or monochrome monitor.
The default setting is Color (closed).
Monitor JP6
Color monitor
Monochrome monitor
18
U19
U19
JP7 & JP8: Cache Memory Configuration
(BLACK color selector)
Use these jumpers to configure SRAM cache memory. The main board
has sockets for 128KB, 256KB of SRAM cache memory (for a
description of installing SRAM chips, see "Installing Memory" in the
previous chapter). The figure below shows the installed SRAM chips
and cache size configuration settings .
128KB Cache
8Kx8 SRAM
JP
512KB Cache
16Kx8 SRAM
JP
U12
U12
32Kx8 SRAM
32Kx8 SRAM
JP
JP8
32Kx8 SRAM
32Kx8 SRAM
64Kx8 SRAM
64Kx8 SRAM
64Kx8 SRAM
64Kx8 SRAM
U18
U20
U21
U18
U20
U21
19
• JP11 & JP12: CPU Clock Speed (WHITE
color selector)
Use JP11 and JP12 to select the external clock speed of the CPU.
Calculate the clock speed according to the following formula:
Ext. Clock Speed x CPU Clock Multiplier = CPU Speed
Example: If you have an Intel 486 DX2-66 CPU and the CPU clock
multiplier is set to 2, set the external clock speed to 33Mhz.
Clock
Speed
25MHz
33MHz
40MHz
50MHz
NOTE: Depending on the installed CPU, you will use either JP16 or
JP12 JP11 CPU Type
SX-25, DX-25, DX2-50
JP30 to set the CPU clock multiplier (see the CPU jumper
settings later in this chapter).
SX-33, DX-33, DX2-66,
DX4-100,Cyrix5x86-100,
Am5x86-P75
SX-40, DX-40, DX2-80,
DX4-120,Cyrix5x86-120
DX-50
JP13: Factory Preset (BLACK color
selector)
This jumper is used for testing purposes only. Its setting is factory
preset.
20
JP19: BIOS Type (BLACK color selector)
Use this jumper to select the BIOS type: EPROM, 5V flash
memory, or 12V flash memory.
BIOS Type JP19
EPROM (default)
12V Flash Memory
(Intel Brand Flash
Rom)
5V Flash Memory
(SST, Winbond &
Mx
Brand Flash Rom)
JP31, JP32, & JP34: CPU Voltage
(YELLOW color selector)
Use JP31, JP32, and JP34 to select the CPU voltage.
Voltage JP31 JP34 JP32
3.3V
3.45V
4.0V
5V
[Any setting]
21
WARNING! Selecting the wrong voltage may severely damage your CPU.
For voltage information, refer to the documentation provided
with the CPU.
22
Socket&
CPU
• Select CPU type, Clock, Voltage:
CPU type selector (BLUE): JP9, JP10, JP14, JP15, JP16, JP17,
JP20, JP23, JP24, JP25, JP26, JP28
JP29, JP30
CPU Clock selector (WHITE): JP12, JP11
CPU Voltage selector (YELLOW): JP31, JP32, JP34
The location for above jumper
ZIF
JP1 6
3
13
JP 17
JP 20
15
1
JP 21
JP 23
JP2 5
14
JP 26JP 24
JP 30
JP9
JP 10
JP11
JP 14
3
1
1
1
5
6
2
JP 15
SiS
JP 12
1
3
Note: Ti CPU setting is the same as Cyrix CPU.
85C497
21
JP31
12
5
JP 32
13
13
JP3 4
1
3
6
JP 28
JP 29
The quick reference table for CPU type, Clock & Voltage selection : C
CPU
AMD
Cyrix
Intel
Function
CPU TYPE Selector (BLUE)
JP9 JP10 JP14 JP15 JP16 JP17 JP20 JP23 JP24
DX2-66
DX2-80
DX4-100
Write
Through
DX4-100
Write Back
DX4-120
Am5x86-P75
X5-133
DX2-66
DX2-80
DX4-100
5x86-100
5x86-120
DX4-100
Write Back
DX4-100
Write
Through
DX2-66
DX2-50
SX-25
P24D-66
P24T-63
P24T-83
2-3 2-3 O O 2-3 O O O 4-5
2-3 2-3 O O 2-3 O O O 4-5
2-3 2-3 O O 1-2 O O O 4-5
2-3 1-2 O 1-2 1-2 2-3 C 2-3 4-5
2-3 1-2 O 1-2 1-2 2-3 C 2-3 4-5
2-3 1-2 O 1-2 1-2 2-3 C 2-3 4-5
2-3 2-3 O O O 1-2 C O 2-3
2-3 2-3 O O O 1-2 C O 2-3
2-3 2-3 O O O 1-2 C O 2-3
2-3 2-3 O 1-2 O 2-3 C 2-3 4-5
2-3 2-3 O 1-2 O 2-3 C 2-3 4-5
2-3 1-2 O 1-2 1-2 2-3 C 2-3 4-5
2-3 2-3 O O O 2-3 C 1-2 4-5
2-3 2-3 O O O 2-3 C 1-2 4-5
2-3 2-3 O O O 2-3 C 1-2 4-5
O 2-3 O O O 2-3 C 1-2 4-5
2-3 1-2 O 1-2 1-2 2-3 C 2-3 4-5
1-2 1-2 1-2 O O 2-3 C O 1-2
1-2 1-2 1-2 O O 2-3 C O 1-2
22
CLOCK
JP25 JP26 JP28 JP29 JP30 JP12 JP11 JP31 JP34 JP32
1-2
3-4 O O O 1-2
3-4
1-2
3-4 O O O 2-3 1-2 2-3 2-3 3-4 3.45V
3-4
1-2
3-4 O O O 1-2
3-4
1-2
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
2-3
1-2
3-4
1-2
3-4
1-2
3-4
O 1-2 O 1-2
3-4
1-2
O 1-2 O 2-3 1-2 2-3 2-3 3-4 3.45V
3-4
1-2
O 1-2 2-3 1-2
3-4
2-3 2-3 2-3 O 1-2
2-3 2-3 2-3 O 2-3 1-2 2-3 2-3 1-2 4.0V
2-3 2-3 2-3 O 1-2
1-2
O 1-2 O 1-2
3-4
1-2
O 1-2 O 2-3 1-2 2-3 2-3 3-4 3.45V
3-4
1-2
O 1-2 O 1-2
3-4
3-4 O O O 1-2
3-4 O O O 1-2
3-4 O O O 1-2 O 2-3 2-3 3-4 3.45V
3-4 O O O 1-2 O 2-3 2-3 3-4 3.45V
1-2
O 1-2 O 1-2
3-4
3-4 1-2 1-2 O 1-2 O 1-2 1-2 X 5V
3-4 1-2 1-2 O 1-2
Selector
(WHITE)
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
1-2
3-4
2-3 2-3 3-4 3.45V
2-3 2-3 3-4 3.45V
2-3 2-3 3-4 3.45V
2-3 2-3 3-4 3.45V
2-3 2-3 3-4 3.45V
2-3 2-3 3-4 3.45V
2-3 2-3 3-4 3.45V
2-3 2-3 3-4 3.45V
2-3 2-3 3-4 3.45V
2-3 2-3 3-4 3.45V
1-2 1-2 X 5V
1-2 1-2 X 5V
VOLTAGE
Selector
(YELLOW)
Note: “O” Open
“C” Closed
23
JP39: Turbo Switch
This connector sets the default speed of the CPU clock. This connector
is usually connected by a lead to a Turbo/Normal switch on the front of
the system case.
Default Clock Speed
JP39
High-speed (turbo) operation
Normal (low-speed) operation
You can change between high-speed and low-speed operation by
pressing the Turbo/Normal switch on the front of the system case or by
pressing the following key combinations simultaneously:
CTRL, ALT, and “-”: Switches the CPU to low speed.
CTRL, ALT, and “+”: Switches the CPU to high speed.
24
Appendix: Connector Pin
Signals
This appendix lists the pin signals for the board’s external connectors.
CN1: Printer Connector
Pin Description Pin Description
1 STB# 10 ACK#
2 PD0 11 BUSY
3 PD1 12 PE
4 PD2 13 SLCT
5 PD3 14 AFD#
6 PD4 15 ERR#
7 PD5 16 INIT#
8 PD6 17 SLIN#
9 PD7 18-25 GND
26 N.C.
25
CN2: Secondary IDE and CN3: Primary IDE
Pin Description Pin Description
1 IDE reset signal 15 IDE data bit 1
2 GND 16 IDE data bit 14
3 IDE data bit 7 17 IDE data bit 0
4 IDE data bit 8 18 IDE data bit 15
5 IDE data bit 6 19, 22, 24,
GND
26, 30, 40
6 IDE data bit 9 23 IDE write signal
7 IDE data bit 5 25 IDE read signal
8 IDE data bit 10 27 IDE ready signal
9 IDE data bit 4 20, 21, 28,
N.C.
29, 32, 34
10 IDE data bit 11 31 IDE IRQ
11 IDE data bit 3 33 IDE address bit 1
12 IDE data bit 12 35 IDE address bit 0
13 IDE data bit 2 36 IDE address bit 2
14 IDE data bit 13 37, 38 I DE chips select
signal
39 IDE active signal
26
CN4: Floppy Disk Drive Connector
Pin Description Pin Description
1, 3, 5, 7, 9,
GND 18 DIR#
11, 13, 15, 17,
19, 21, 23, 25,
27, 29, 31, 33
2 RWC# 20 STEP#
4,6 N.C. 22 WD#
8 INDEX# 24 WE#
10 MOA# 26 TRAK0
12 DSB# 28 WP#
14 DSA# 30 RDATA#
16 MOB# 32 HEAD#
34 DSKCHG#
CN5: COMA Port and CN6: COMB Port
Pin Description Pin Description
1 DCD 6 DSR
2 SIN 7 RTS
3 SOUT 8 CTS
4 DTR 9 RI
5 GND 10 N.C.
JP4: The Keyboard Connector
27
Pin Description
1 Keyboard data
2 Keyboard clock
3 N.C.
4 Ground
5 +5V DC
JP5: The Power Supply Connector
Pin Description Pin Description
1 Power Good 7 Ground
2 +5v DC 8 Ground
3 +12V DC 9 -5V DC
4 -12V DC 10 +5V DC
5 Ground 11 +5V DC
6 Ground 12 +5V DC
JP27: Speaker Connector
Pin Description
1 DATA out
2 Ground
3 Ground
4 Vcc
JP33: IDE Active LED
Pin Description
28
1 IDE Active Signal
2 +5V DC
JP37: Turbo LED Connector
Pin Description
1 +5V DC
2 Turbo Signal
JP40: Keylock & Power LED Connector
Pin Description
1 Power LED
2 N.C.
3 Ground
4 Keylock
5 Ground
LED1: Power-Saving LED Connector
Pin Description
1 +5V DC
2 Standby Signal
Jumper Switches and Functions List
Jumper Function
JP1 External Battery Connector
JP2 & JP3 Clear BIOS Setup Data
29
JP4 Keyboard Connector
JP5 Power Supply Connector
JP6 Monochrome/Color Selection
JP7 & JP8 Cache Size Selection
JP9 & JP10
JP14-JP17
JP20-JP21 CPU Type Selection
JP23-JP26
JP28-JP30
JP11 & JP12 Clock Speed Selection
JP13 [Factory Preset: Testing Purposes Only]
JP19 BIOS Type Selection
JP27 Speaker Connector
JP31, JP32, & JP34 CPU Voltage Selection
JP33 IDE Active LED Connector
JP35 Standby Mde Switch Connector
JP36 Power-Saving Output Signal Connector
JP37 Turbo LED Connector
JP38 Reset Connector
JP39 Turbo Switch Connector
JP40 Keylock & Power LED Connector
LED1 Power Saving LED Connector
CN1 Printer Connector
CN2 Secondary IDE Connector
CN3 Primary IDE Connector
CN4 Floppy Disk Drive Connector
CN5 Serial Port 1 Connector
CN6 Serial Port 2 Connector
Jumper
JP1
JP2 & JP3 BIOS
JP4
JP5
30
JP6 /
JP7 & JP8
JP9 & JP10
JP14-JP17
JP20-JP21 CPU
JP23-JP26
JP28-JP30
JP11 & JP12
JP13
JP19 BIOS
JP27
JP31, JP32, & JP34 CPU
JP33
JP35
JP36
JP37 Turbo
JP38 Reset
JP39 Turbo
JP40 LED
LED1 LED
CN1
CN2 2
CN3 1
CN4
CN5 1
CN6 2
31
32
33
34
35
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