SBC comm Personal Computer SBC 770 User Guide
SBC-770  
Pentium II CPU Card with LCD,  
Ethernet, High Drive, & SSD  
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Copyright Notice  
This document is copyrighted, 1999. All rights are reserved. The  
original manufacturer reserves the right to make improvements to  
the products described in this manual at any time without notice.  
No part of this manual may be reproduced, copied, translated, or  
transmitted in any form or by any means without the prior written  
permission of the original manufacturer. Information provided in  
this manual is intended to be accurate and reliable. However, the  
original manufacturer assumes no responsibility for its use, nor for  
any infringements upon the rights of third parties which may result  
from its use.  
Acknowledgements  
AMD is a trademark of Advanced Micro Devices, Inc.  
AMI is a trademark of American Megatrends, Inc.  
Award is a trademark of Award Software International, Inc.  
Cyrix is a trademark of Cyrix Corporation.  
IBM, PC/AT, PS/2, and VGA are trademarks of International  
Business Machines Corporation.  
Intel and Pentium II are trademarks of Intel Corporation.  
Microsoft Windows® is a registered trademark of Microsoft Corp.  
SMC is a trademark of Standard Microsystems Corporation.  
RTL is a trademark of Realtek Semi-Conductor Co., Ltd.  
C&T is a trademark of Chips and Technologies, Inc.  
UMC is a trademark of United Microelectronics Corporation.  
ITE is a trademark of Integrated Technology Express, Inc.  
SiS is a trademark of Silicon Integrated Systems Corp.  
VIA is a trademark of VIA Technology, Inc.  
All other product names or trademarks are properties of their  
respective owners.  
Part No. 2047770001 SBC-770 2nd Edition  
Printed in Taiwan  
July 1999  
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A Message to the Customer  
AAEON Customer Services  
Each and every AAEON product is built to the most exacting  
specifications to ensure reliable performance in the harsh and  
demanding conditions typical of industrial environments. Whether  
your new AAEON equipment is destined for the laboratory or the  
factory floor, you can be assured that your product will provide the  
reliability and ease of operation for which the name AAEON has  
come to be known.  
Your satisfaction is our primary concern. Here is a guide to  
AAEON's customer services. To ensure you get the full benefit of  
our services, please follow the instructions below carefully.  
Technical Support  
We want you to get the maximum performance from your products.  
So if you run into technical difficulties, we are here to help. For the  
most frequently asked questions, you can easily find answers in  
your product documentation. These answers are normally a lot  
more detailed than the ones we can give over the phone.  
So please consult this manual first. If you still cannot find the  
answer, gather all the information or questions that apply to your  
problem, and with the product close at hand, call your dealer. Our  
dealers are well trained and ready to give you the support you need  
to get the most from your AAEON products. In fact, most problems  
reported are minor and are able to be easily solved over the phone.  
In addition, free technical support is available from AAEON  
engineers every business day. We are always ready to give advice  
on application requirements or specific information on the installa-  
tion and operation of any of our products.  
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Product Warranty  
AAEON warrants to you, the original purchaser, that each of its  
products will be free from defects in materials and workmanship for  
one year from the date of purchase.  
This warranty does not apply to any products which have been  
repaired or altered by persons other than repair personnel autho-  
rized by AAEON, or which have been subject to misuse, abuse,  
accident or improper installation. AAEON assumes no liability  
under the terms of this warranty as a consequence of such events.  
Because of AAEON's high quality-control standards and rigorous  
testing, most of our customers never need to use our repair service.  
If an AAEON product is defective, it will be repaired or replaced at  
no charge during the warranty period. For out-of-warranty repairs,  
you will be billed according to the cost of replacement materials,  
service time, and freight. Please consult your dealer for more  
details.  
If you think you have a defective product, follow these steps:  
1. Collect all the information about the problem encountered. (For  
example, CPU type and speed, AAEON products used, other  
hardware and software used, etc.) Note anything abnormal and  
list any on-screen messages you get when the problem occurs.  
2. Call your dealer and describe the problem. Please have your  
manual, product, and any helpful information readily available.  
3. If your product is diagnosed as defective, obtain an RMA  
(return material authorization) number from your dealer. This  
allows us to process your return more quickly.  
4. Carefully pack the defective product, a fully-completed Repair  
and Replacement Order Card and a photocopy proof of pur-  
chase date (such as your sales receipt) in a shippable container.  
A product returned without proof of the purchase date is not  
eligible for warranty service.  
5. Write the RMA number visibly on the outside of the package  
and ship it prepaid to your dealer.  
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Packing list  
Before you begin installing your card, please make sure that the  
following materials have been shipped:  
• 1 SBC-770 All-in-One Single Board Computer  
• 1 Quick Installation Guide  
• 1 Supporting CD-ROM contains the followings:  
-- User's Manual (this manual in PDF file)  
-- Ethernet drivers and utilities  
-- VGA drivers and utilities  
-- BIOS files  
• 1 Hard disk drive (IDE) interface cable  
• 1 Floppy disk drive interface cable  
• 1 6-pin mini-DIN dual outlet adapter for keyboard and PS/2  
mouse  
• 1 mounting bracket contains 1 Parallel port adapter (26 pins) and  
COM2 adapter (for RS-232/422/485)  
If any of these items are missing or damaged, contact your distribu-  
tor or sales representative immediately.  
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Notice  
Dear Customer,  
Thank you for purchasing the SBC-770 board. This user's  
manual is designed to help you to get the most out of the SBC-770,  
please read it thoroughly before you install and use the board. The  
product that you have purchased comes with an two-year limited  
warranty, but AAEON will not be responsible for misuse of the  
product. Therefore, we strongly urge you to first read the manual  
before using the product.  
To receive the lastest version of the user manual, please visit our  
Web site at:  
http://www.aaeon.com  
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Contents  
Chapter 1: General Information .......................1  
Introduction ........................................................................... 2  
Features.................................................................................. 3  
Specifications ......................................................................... 4  
Board layout ........................................................................... 7  
Board dimensions ................................................................. 8  
Chapter 2: Installation .......................................9  
Jumpers and connectors .................................................... 10  
Locating jumpers ................................................................ 12  
Locating connectors ........................................................... 13  
Setting jumpers ................................................................... 14  
CPU installing and upgrading ............................................ 15  
Mounting the CPU and cooling module .......................... 16  
Installing DRAM (DIMMs) .............................................. 18  
Cache Memory .................................................................... 19  
Clear CMOS (J2) ................................................................ 20  
LCD driving voltage select (J4) ....................................... 20  
System temperature thermal sensor (J5)........................ 21  
CPU frequency ratio select (J6) ....................................... 21  
Pentium II CPU jumper setting examples ...............................22  
LCD clock signal select (J7) ............................................. 24  
DOC address select (J8) ................................................... 25  
COM2 RS-232/422/485 select (J10, J9) ......................... 26  
Power connectors (PWR1, CN5) ...................................... 27  
Power connector (PWR1) ......................................................27  
CPU fan power connector (CN5)...........................................27  
Power LED and Keylock (CN1) ....................................... 28  
Hard drive LED (CN2)....................................................... 28  
External speaker (CN3)..................................................... 29  
Reset switch (CN4)............................................................. 29  
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IDE hard drive connectors (CN7, CN8).......................... 30  
Connecting the hard drive .......................................................30  
IDE hard drive connectors (CN7, CN8) .................................31  
IrDA connector (CN9) ....................................................... 32  
Parallel port connector (CN10) ......................................... 33  
Parallel port IRQ .....................................................................33  
Parallel Port connector table (CN10)......................................33  
Floppy drive connector (CN12) ........................................ 34  
Connecting the floppy drive.....................................................34  
Floppy drive connector (CN12)...............................................35  
USB connector (CN14) ...................................................... 36  
Display connectors (CN15, CN6) ..................................... 37  
VGA display connector (CN15)..............................................37  
LCD display connector (CN6) ................................................38  
Serial ports (CN16, CN11)................................................. 39  
COM2 RS-232/422/485 serial prots (CN11) ...........................39  
100Base-Tx Ethernet connector (CN17) ........................ 39  
Keyboard and PS/2 mouse connector (CN18, CN13) ... 40  
DiskOnChip socket (U34) ................................................. 41  
DiskOnChip (DOC) 2000 Installation ............................. 42  
Chapter 3: Award BIOS Setup ..........................43  
Starting setup....................................................................... 44  
Setup keys ............................................................................ 45  
Getting help ......................................................................... 46  
In case of problem...................................................................46  
Main setup menu ................................................................ 47  
Standard CMOS setup ....................................................... 49  
BIOS features setup ........................................................... 56  
CHIPSET features setup ................................................... 60  
Power management setup.................................................. 64  
PNP/PCI congfiguration setup .......................................... 69  
Load BIOS defaults/Load setup defaults ........................ 72  
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Integrated peripherals setup............................................. 73  
Supervisor/User password setting ................................... 76  
IDE HDD auto detection ................................................... 78  
Save & exit setup................................................................ 79  
Chapter 4: Flat Panel/CRT controller Display  
Drivers and Utilities ......................81  
Software drives .................................................................... 82  
Hardware configuration ..........................................................82  
Necessary prerequisites ..........................................................83  
Before you begin .....................................................................83  
Windows 95 .......................................................................... 84  
Driver installation ....................................................................84  
Windows 3.51....................................................................... 92  
Driver installation ....................................................................92  
Windows NT 4.0 .................................................................. 93  
Driver installation ....................................................................93  
Chapter 5: Ethernet Software configuration ...  
.........................................................95  
Ethernet software configuration ....................................... 96  
Appendix A: Programming the Watchdog  
Timer.............................................97  
Programming the watchdog timer .................................... 98  
How to set the watchdog timer ...............................................98  
Demo program ........................................................................99  
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1
General  
Information  
This chapter gives background informa-  
tion on the mainboard.  
Sections include:  
• Board specifications  
• Layout and dimensions  
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Introduction  
The SBC-770 is an all-in-one Pentium II processor based single  
board computer (SBC) with a PCI Flat Panel controller, a PCI  
100Base-Tx Ethernet interface. When using an Intel Pentium II  
processor, the SBC-770 achieves outstanding performance that  
surpasses any other SBC in its class. In addition, the onboard SSD  
interface supports M-systems DiskOnChip 2000 series, memory  
capacity from 2 MB to 144 MB.  
Onboard features include two serial ports (one RS-232, one RS-232/  
422/485), one multi-mode parallel (ECP/EPP/SPP) port, connector for  
two USB (Universal Serial Bus) ports, a floppy drive controller, and  
a keyboard/PS/2 mouse interface. The built-in high speed PCI IDE  
controller supports Ultra DMA/33 mode. Up to four IDE devices  
can be connected, including large hard disks, CD-ROM drives, and  
tape backup drives, etc.  
The SBC-770 also features power management to minimize power  
consumption. It complies with the ACPI standard and supports  
three types of power saving features: Doze mode, Standby mode,  
and Suspend mode. In addition, the board's watchdog timer can  
automatically reset the system or generate an interrupt in case the  
system stops due to a program bug or EMI.  
Highly integrated SBC  
The SBC-770 is a highly integrated SBC that combines video and  
network functions on a single computer board. It provides up to  
1024 x 768 resolution @ 64K colors with on-chip 2MB SDRAM  
display memory. Major onboard devices adopt PCI technology to  
achieve outstanding computing performance when used with Intel  
Pentium II level processors, making the SBC-770 one of the world's  
best and most powerful all-in-one Single Board Computers.  
2
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Features  
• Supports Intel Pentium II CPUs up to 450MHz  
• Supports DiskOnChip (SSD) up to 144MB  
• C&T 69000 LCD controller supports 36-bit TFT Panels  
• 100Base-Tx Fast Ethernet  
• Supports H/W status monitoring  
• High Drive design to enhance the ISA driving capacity  
Chapter 1 General Information  
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3
Specifications  
Standard SBC functions  
• CPU: Intel Pentium II 233~450MHz (With system bus frequencies of  
66/100MHz)  
• Bus interface: PCI/ISA bus. PICMG 2.0 standard  
• ISA driving capacity: Built-in Address/Data buffer supports driving  
capacity up to 64mA  
• CPU socket: Slot 1  
• BIOS: Award 256KB Flash BIOS  
• Chipset: Intel 440BX  
• I/O chipset: Winbond W83977TF with fully 16-bit I/O decoded  
• Memory : Onboard three 168-pin DIMM sockets support up to  
384Mbytes SDRAM  
• Enhanced IDE: Supports up to four IDE devices. Supports Ultra DMA/  
33 mode with data transfer rate 33MB/Sec.  
• FDD interface: Supports up to two floppy disk drives, 5.25" (360KB and  
1.2MB) and/or 3.5" (720KB, 1.44MB, and 2.88MB)  
• Parallel port: One bi-directional parallel port. Supports SPP, ECP, and  
EPP modes  
• Serial port: One RS-232 and one RS-232/422/485 serial port. Ports can be  
configured as COM1, COM2, COM3, COM4, or disabled individually.  
(16C550 equivalent)  
• IR interface: Supports one IrDA Tx/Rx header  
• KB/Mouse connector : 6-pin mini-DIN connector supports PC/AT  
keyboard and PS/2 mouse. Additional 5-pin header supports PC/AT  
keyboard for IPC applications  
• USB connectors: 5 x 2 header onboard supports dual USB ports  
• Battery: Lithium battery for data retention of up to 10 years  
4
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• Watchdog timer: Can generate a system reset, IRQ15, or NMI. Software  
selectable time-out interval (2 sec. ~ 255 sec., 1 sec./step)  
• DMA: 7 DMA channels (8237 equivalent)  
• Interrupt: 15 interrupt levels (8259 equivalent)  
• Power management: I/O peripheral devices support power saving and  
doze/stanby/suspend modes. APM 1.2 ocmpliant  
• H/W status monitoring: Winbond W83781D H/W status monitoring IC  
supports power supply voltages, fan speed, and temperatures monitor-  
ing  
Flat Panel/CRT Interface  
• Chipset: C&T 69000  
• Display memory: Built-in 2MB SDRAM  
• Display type: Supports non-interlaced CRT and LCD (TFT, DSTN, and  
Mono) displays. Can display both CRT and Flat Panel simultaneously  
• Resolution: Up to 1024x768@64K colors  
Ethernet Interface  
• Chipset: Realtek RTL8139B 100Base-Tx Fast Ethernet controller  
• Ethernet interface: Onboard 100Base-Tx RJ-45 connector  
SSD Interface  
• One 32-pin DIP socket supports M-Systems DiskOnChip 2000 series up  
to 144MB  
Chapter 1 General Information  
5
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Mechanical and environmental  
• Power supply voltage: +5V (4.75V to 5.25V),  
+12V (11.4V to 12.6V)  
• Typical power requirement: +5V @ 7A  
• Operating temperature: 32 to 140o F (0 to 60o C)  
• Board size: 13.3"(L) x 4.8"(W) (338mm x 122mm)  
• Weight: 1.2 lb. (0.5 Kg)  
6
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Board layout  
Chapter 1 General Information  
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7
Board dimensions  
4.803"  
0.795"  
0.126"  
3.174"  
0.228"  
1.874"  
0.478"  
13.327"  
2.470"  
0.076"  
0.570"  
1.861"  
1.673"  
8
SBC-770 User Manual  
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2
Installation  
This chapter describes how to set up the  
main board hardware, including instruc-  
tions on setting jumpers and connecting  
peripherals, switches, and indicators. Be  
sure to read all the safety precautions  
before you begin the installation proce-  
dure.  
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Jumpers and connectors  
Connectors on the board link it to external devices such as hard  
disk drives, a keyboard, or floppy drives. In addition, the board  
has a number of jumpers that allow you to configure your system  
to suit your application.  
The following tables list the function of each of the board's  
jumpers and connectors.  
Jumpers  
Label  
J2  
Function  
Clear CMOS  
J4  
J5  
J6  
J7  
LCD driving voltage select  
System temperature thermal sensor  
CPU frequency ratio select  
LCD clock signal select  
DOC address select  
J8  
J9  
J10  
COM2 RS-232/422/485 select  
COM2 RS-232/422/485 select  
10 SBC-770 User Manual  
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Connectors  
Label  
CN1  
Function  
Power LED and keylock  
Hard drive LED  
CN2  
CN3  
External speaker  
CN4  
Reset switch  
CN5  
CN6  
CN7  
CN8  
CPU fan power connector  
LCD display connector  
IDE hard drive connector (Primary)  
IDE hard drive connector (Secondary)  
IrDA connector  
CN9  
CN10  
CN11  
Parallel port connector  
COM2 RS-232/422/485 serial port  
connector  
CN12  
CN13  
CN14  
CN15  
CN16  
CN17  
CN18  
U34  
Floppy drive connector  
Internal keyboard connector  
USB connector  
VGA display connector  
COM1 RS-232 serial port connector  
100Base-Tx Ethernet connector  
Keyboard and PS/2 mouse connector  
DiskOnChip socket  
PWR1  
Power connector  
Chapter 2 Installation 11  
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Locating jumpers  
J2  
J4  
J5  
J6  
J7  
J8  
J9  
J10  
J15  
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Locating connectors  
CN2  
CN3  
CN1  
CN4  
CN6  
CN5  
CN8  
CN7  
CN9  
CN10  
CN11  
CN12  
U34  
PWR1  
CN14  
CN13  
CN16  
CN15  
CN18  
CN17  
Chapter 2 Installation 13  
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Setting jumpers  
You can configure your card to match the needs of your application  
by setting jumpers. A jumper is the simplest kind of electric switch.  
It consists of two metal pins and a small metal clip (often protected  
by a plastic cover) that slides over the pins to connect them. To  
“close” a jumper you connect the pins with the clip. To “open” a  
jumper you remove the clip. Sometimes a jumper will have three  
pins, labeled 1, 2, and 3. In this case you would connect either pins  
1 and 2 or 2 and 3.  
3
2
1
Open  
Closed  
Closed 2-3  
The jumper settings are schematically depicted in this manual as  
follows:  
1 2 3  
Open  
Closed  
Closed 2-3  
A pair of needle-nose pliers may be helpful when working with  
jumpers.  
If you have any doubts about the best hardware configuration for  
your application, contact your local distributor or sales representa-  
tive before you make any changes.  
14 SBC-770 User Manual  
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CPU installing and upgrading  
You can upgrade to a more powerful Pentium II CPU at any time.  
Simply remove the old CPU, install the new one, and set the  
jumpers for the new CPU speed.  
Warning! Always disconnect the power cord from your  
chassis when you are working on it. Do not  
make connections while the power is on as  
sensitive electronic components can be dam-  
aged by the sudden rush of power. Only experi-  
enced electronics personnel should open the  
system chassis.  
Caution! Always ground yourself to remove any static  
charge before touching the system board.  
Modern electronic devices are very sensitive to  
static electric charges. Use a grounding wrist  
strap at all times. Place all electronic components  
on a static-dissipative surface or in a static-  
shielded bag when they are not in the chassis.  
When you install a new CPU, be sure to adjust the board settings,  
such as CPU frequency ratio. Improper settings may damage  
the CPU.  
Chapter 2 Installation 15  
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Mounting the CPU and cooling  
Modules  
The Pentium II is a module-type CPU which runs at high speeds,  
for example 233 ~ 450 MHz, so the cooling mechanism becomes  
critifal for system reliability. These are two types of cooling  
methods: one with a cooling fan attached to the heat sink of the  
Pentium II module, the other with a huge heat sink without any  
cooling fan attached.  
Both cooling methods for the Pentium II require a "retention  
module" to firmly fix the Pentium II CPU to Slot 1. The follow-  
ing figures illustrate the steps involved in mounting the retention  
module and installing the CPU and cooling modules.  
16 SBC-770 User Manual  
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Mounting CPU and cooling modules - Step 1  
Step 1  
Mounting CPU and cooling modules - Step 2  
Step 2  
Chapter 2 Installation 17  
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Installing DRAM (DIMMs)  
System Memory  
The left edge of the SBC-770 contains three sockets for 168-pin  
dual inline memory module (DIMM). The socket uses 3.3 V  
unbuffered synchronous DRAM (SDRAM). DIMM is available in  
capacities of 16, 32, 64, or 128 MB. The socket can be filled in the  
DIMM of any size, giving your SBC-770 single board computer  
between 16 and 128 MB of memory.  
Supplementary information about DIMM  
Your SBC-770 can accept both regular and PC-100 SDRAM DIMM  
Module(with or without parity). However, if the Pentium II 350MHz  
or up CPU is used, The SBC-770 can only accept PC-100 SDRAM  
DIMM Module.  
Single-sided modules are typically 16 or 64 MB; double-sided  
modules are usually 32 or 128 MB.  
Memory Installation Procedures  
To install DIMM, first make sure the two handles of the DIMM  
socket are in the "open" position. i.e. The handles remain outward.  
Slowly slide the DIMM module along the plastic guides on both  
ends of the socket. Then press the DIMM module right down into  
the socket, until you hear a click. This is when the two handles  
have automatically locked the memory module into the correct  
position of the DIMM socket. (See Figure below) To take away the  
memory module, just push both handles outward, and the memory  
module will be ejected by the mechanism in the socket.  
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Cache memory  
Since the second level cache has been embedded into the Pen-  
tium® II CPU, you do not have to take care of either SRAM chips  
or SRAM modules. The built-in second level cache in the Pentium  
II yields much higher performance than the external cache memo-  
ries. The cache size in the Pentium II CPU is either 256 KB or 512  
KB. Normally, for workstation and server application, the 256 KB  
version is enough. However, if your system is for heavy duty  
applications, the 512 KB version will help a lot. Specifically for our  
Pentium II based SBC, the Pentium II has another version that  
provides much better data security if combined with the DRAM  
ECC. Check with your vendor for various Pentium II models.  
Chapter 2 Installation 19  
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Clear CMOS (J2)  
You can use J2 to clear the CMOS data if necessary. To reset the  
CMOS data, set J2 to 2-3 closed for just a few seconds, and then  
move the jumper back to 1-2 closed.  
Clear CMOS (J2)  
Protect*  
Clear CMOS  
1
2
3
1
2
3
J2  
*default  
LCD driving voltage select (J4)  
You can select the LCD connector CN6 (pin 5 and pin 6) driving  
voltage by setting J4. The configurations are as follows:  
LCD driving voltage select (J4)  
5V  
3.3V *  
J4  
1
2
3
1
2
3
*default  
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System temperature thermal sensor  
(J5)  
This jumper is reserved to connect a system temperature thermal  
sensor in order to detect the system temperature.  
CPU frequency ratio select (J6)  
CPU core frequency = CPU frequency ratio (3~5.5) * External  
bus clock (66 or 100 MHz)  
CPU frequency ratio select (J6)  
3x  
3.5x*  
4x  
1
2
3
5
6
1
2
3
5
1
3
5
4
6
2
4
6
4
4.5x  
5x  
5.5x  
1
2
3
5
6
1
3
5
1
3
5
2
4
6
4
2
4
6
*default  
Chapter 2 Installation 21  
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Pentium II CPU jumper setting examples  
Pentium II CPU  
J6  
233/66MHz  
1
2
3
5
6
4
3
266/66MHz  
300/66MHz  
333/66MHz  
300/100MHz  
350/100MHz *  
400/100MHz  
1
5
2
4
3
6
1
2
5
6
4
3
1
5
2
4
3
6
1
5
2
1
4
3
6
5
2
1
4
3
6
5
2
4
6
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Pentium II CPU  
J6  
450/100MHz  
1
2
3
5
6
4
500/100MHz  
550/100MHz  
*default  
1
3
5
2
4
6
1
3
5
2
4
6
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LCD clock signal select (J7)  
You can select the LCD control signal by setting J7. The following  
charts show the available option.  
LCD clock signal select (J7)  
SFCLK-*  
SHCLK  
J7  
1
2
3
1
2
3
*default  
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DOC address select (J8)  
The DiskOnChip 2000 occupies an 8 Kbyte window in the upper  
memory address range of D400 to E000. You should ensure this  
does not conflict with any other device's memory address. J8  
controls the memory address of the Flash disk.  
DiskOnChip 2000 memory address (J8)  
Memory address (HEX)  
DISABLE  
1
2
3
4
DC00  
1
2
3
4
D400  
1
1
2
2
3
3
4
4
D800*  
* default  
These addresses might conflict with the ROM BIOS of other  
peripheral boards. Please select the appropriate memory address  
to avoid memory conflicts.  
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COM2 RS-232/422/485 select (J10, J9)  
The SBC-770 COM2 serial port can be selected as RS-232, RS-422,  
or RS-485 by setting J10 & J9.  
COM2 Select (J10, J9)  
RS-232*  
RS-422  
RS-485  
12  
10  
7
12  
9
10  
7
12  
9
10  
7
9
6
3
J10  
4
6
4
6
4
1
3
1
3
1
6
4
2
5
6
4
2
6
4
2
5
5
J9  
3
1
3
1
3
1
*default  
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Power connectors (PWR1, CN5)  
Power connector (PWR1)  
The power supply uses 12-pin connector shown below. Make sure  
you plug in the right direction.  
ATX power connector (PWR1)  
Pin  
1
2
Signal  
N.C.  
+5V  
3
4
5
6
7
8
9
+12V  
-12V  
GND  
GND  
GND  
GND  
-5V  
10  
11  
12  
+5V  
+5V  
+5V  
CPU fan power connector (CN5)  
Plug in the fan cable to the 3-pin fan connector onboard. The fan  
connector is marked CN5.  
CPU fan power connector (CN5)  
Pin  
1
2
Signal  
Fan speed sense  
+12V  
3
GND  
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Power LED and Keylock (CN1)  
You can use an LED to indicate when the CPU card is on. Pin1 of  
CN1 supplies the LED’s power, and Pin3 is the ground.  
You can use a switch (or a lock) to disable the keyboard so the PC  
will not respond to any input. This is useful if you do not want  
anyone to change or stop a running program. Connect the switch  
between Pin 4 and 5 of CN1.  
Power LED and keylock (CN1)  
Pin  
1
2
Function  
LED power (Vcc)  
N.C.  
3
GND  
4
5
Keyboard lock  
GND  
Hard drive LED (CN2)  
You can connect an LED to CN2 to indicate when the HDD is  
active.  
Hard drive LED (CN2)  
Pin  
1
2
Function  
HD-LED+  
HD-LED-  
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External speaker (CN3)  
The CPU card has its own buzzer. You can also connect to the  
external speaker on your computer chassis. Pin assignments for  
CN3 are shown below:  
External speaker (CN3)  
Pin  
Function  
1
2
3
Vcc (For external speaker use)  
Speaker- (For external speaker use)  
Internal Buzzer *  
4
Speaker- *  
* default  
External speaker (CN3)  
Internal Buzzer  
External Speaker  
1
2
3
4
1
2
3
4
Reset switch (CN4)  
You can connect an external switch to easily reset your computer.  
This switch restarts your computer as if you had turned off the  
power, then turned it back on.  
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IDE hard drive connector (CN7, CN8)  
You can attach up to four Enhanced Integrated Device Electronics  
hard disk drives to the mainboard's internal controller. The  
mainboard's IDE controller uses a PCI local-bus interface. This  
advanced interface supports faster data transfer and allows the IDE  
hard drive to exceed 528 MB.  
Connecting the hard drive  
Connecting drives is done in a daisy-chain fashion and requires  
one of two cables, depending on the drive size.  
Wire number 1 on the cable is normally red or blue, and the other  
wires are usually gray.  
1. Connect one end of the cable to CN7 or CN8. Make sure that  
the red (or blue) wire corresponds to pin 1 on the connector,  
which is labeled on the board (on the right side).  
2. Plug the other end of the cable to the Enhanced IDE hard drive,  
with pin 1 on the cable corresponding to pin 1 on the hard  
drives. (see your hard drive's documentation for the location of  
the connector).  
Connect a second drive as described above.  
Unlike floppy drives, IDE hard drives can connect to either end  
of the cable. If you install two drives, you will need to set one  
as the master and the other one as the slave by using jumpers  
on the drives. If you install just one drive, set it as the master.  
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IDE hard drive connectors (CN7, CN8)  
IDE hard drive connectors (CN7, CN8)  
Pin  
Signal  
IDE RESET  
DATA 7  
DATA 6  
DATA 5  
DATA 4  
DATA 3  
DATA 2  
DATA 1  
DATA 0  
SIGNAL GND  
N/C  
IO WRITE  
IO READ  
IO CHANNEL READY 28  
N/C  
IRQ14  
ADDR 1  
ADDR 0  
Pin  
2
4
6
8
10  
12  
14  
16  
18  
20  
22  
24  
26  
Signal  
GND  
1
3
5
7
DATA 8  
DATA 9  
DATA 10  
DATA 11  
DATA 12  
DATA 13  
DATA 14  
DATA 15  
N/C  
GND  
GND  
GND  
ALE  
GND  
IOCS16  
N/C  
ADDR 2  
HARD DISK SELECT 1  
MGND  
9
11  
13  
15  
17  
19  
21  
23  
25  
27  
29  
31  
33  
35  
37  
39  
30  
32  
34  
36  
38  
40  
HARD DISK SELECT 0  
IDE ACTIVE  
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IrDA connector (CN9)  
The IrDA connector (CN9) 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 orentation  
when you plug onto IrDA connector (CN9).  
IrDA connector (CN9)  
Pin  
1
Signal  
Vcc  
2
3
FIrRx  
IrRx  
4
5
GND  
IrTx  
6
CIrRx  
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Parallel port connector (CN10)  
Normally, the parallel port is used to connect the board to a  
printer. The mainboard includes an onboard parallel port, accessed  
through CN10, a 26-pin flat-cable connector. You need an adapter  
cable if you use a traditional DB-25 connector. The cable has a 26-  
pin connector on one end and a DB-25 connector on the other.  
Parallel port IRQ  
The mainbaord supports one parallel port. The port is designated  
as LPT1 and can be disabled or changed to LPT2 or LPT3 in the  
system BIOS setup.  
Parallel port connector table (CN10)  
Parallel port connector (CN10)  
Pin  
1
3
Signal  
/STROBE  
DO  
Pin  
2
4
Signal  
\AUTOFD  
ERR  
5
D1  
6
\INIT  
7
9
D2  
D3  
D4  
D5  
D6  
D7  
\ACK  
BUST  
PE  
8
\SLCTINI  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
10  
12  
14  
16  
18  
20  
22  
24  
26  
11  
13  
15  
17  
19  
21  
23  
25  
SLCT  
N/C  
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Floppy drive connector (CN12)  
You can attach up to two floppy drives to the mainboard control-  
ler. You can use any combination of 5¼" (360 KB and 1.2 MB)  
and/or 3½" (720 KB, 1.44 MB, and 2.88 MB) drives.  
A 34-pin daisy-chain drive connector cable is required for a dual-  
drive system. On one end of the cable is a 34-pin flat-cable  
connector. On the other end are two sets of floppy disk drive  
connectors. Each set consists of a 34-pin flat-cable connector  
(usually used for 3½" drives) and a printed-circuit board connec-  
tor (usually used for 5¼" drives).  
Wire number 1 on the cable is normally red or blue, and the other  
wires are usually gray.  
Connecting the floppy drive  
1. Plug the 34-pin flat-cable connector into CN12. Make sure that  
the red or blue wire corresponds to pin 1 on the connector.  
2. Attach the appropriate connector on the other end of the cable  
to the floppy drive(s). You can use only one connector in the  
set. The set on the end (after the twist in the cable) connects to  
the A: drive. The set in the middle connects to the B: drive.  
3. If you are connecting a 5¼" floppy drive, line up the slot in the  
printed circuit board with the blocked-off part of the cable  
connector.  
If you are connecting a 3½" floppy drive, you may have trouble  
determining which pin is pin number 1. Look for a number  
printed on the circuit board indicating pin number 1. Also,  
the connector on the floppy drive connector may have a slot.  
When the slot is up, pin number 1 should be on the right.  
Check the documentation that came with the drive for more  
information.  
If you desire, connect the B: drive to the connectors in the  
middle of the cable as described above.  
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Floppy drive connector (CN12)  
Floppy drive connector (CN12)  
Pin  
1
Signal  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
GND  
Pin  
2
Signal  
DENSITY SELECT  
N/C  
3
4
5
7
6
8
DRIVE TYPE  
INDEX  
9
10  
12  
14  
16  
18  
20  
22  
24  
26  
28  
30  
32  
34  
MOTOR 0  
11  
13  
15  
17  
19  
21  
23  
25  
27  
29  
31  
33  
DRIVE SELECT 1  
DRIVE SELECT 2  
MOTOR 1  
DIRECTION  
STEP  
WRITE DATA  
WRITE GATE  
TRACK 0  
WRITE PROTECT  
READ DATA  
HEAD DELECT  
DISK CHANGE  
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USB connector (CN14)  
The SBC-770 provides two USB (Universal Serial Bus) interfaces,  
which give complete plug and play, hot attach/detach for up to 127  
external devices. The USB interfaces comply with USB specifica-  
tion Rev. 1.0, and can be disabled in the system BIOS setup.  
USB connector (CN14)  
Pin  
1
Function  
Vcc  
Pin  
6
Function  
Vcc  
2
3
4
USBDO-  
USBDO+  
GND  
7
8
9
USBD1-  
USBD1+  
GND  
5
GND  
10  
N.C.  
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Display connectors (CN15, CN6)  
The mainboard's PCI SVGA interface can drive conventional CRT  
displays and is capable of driving a wide range of flat panel  
displays, including electroluminescent (EL), gas plasma, passive  
LCD, and active LCD displays. The board has two connectors to  
support these displays, one for standard CRT VGA monitors and  
one for flat panel displays.  
VGA display connector (CN15)  
VGA display connector (CN15)  
Pin  
1
Signal  
Red video  
2
3
Green video  
Blue video  
4
Not used  
5
GND  
6
7
8
9
10  
11  
12  
13  
14  
15  
Red return (GND)  
Green return (GND)  
Blue return (GND)  
Key (on pin)  
Sync return (GND)  
Monitor ID (not used)  
Monitor ID  
Horizontal sync  
Vertical sync  
Not used  
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LCD display connector (CN6)  
CN6 is a 50-pin, dual-in-line header used for flat panel displays.  
When the mainboard's power is applied, the control signal is low  
until just after the relevant flat panel signals are present.  
Configuration of the VGA interface is done completely via the  
software utility. You do not have to set any jumpers.  
LCD display connector (CN6)  
Pin  
1
3
5
7
Signal  
+12 VDC  
GND  
+5 VDC  
ENAVEE  
P0  
Pin Signal  
2
4
6
8
+12 VDC  
GND  
+5 VDC  
GND  
9
10 P1  
11  
13  
15  
17  
19  
21  
23  
25  
27  
29  
31  
33  
35  
37  
39  
41  
43  
45  
47  
49  
P2  
P4  
P6  
P8  
12 P3  
14 P5  
16 P7  
18 P9  
P10  
P12  
P14  
P16  
P18  
P20  
P22  
P24  
SHF CLK  
M
GND  
P26  
P28  
P30  
P32  
P34  
20 P11  
22 P13  
24 P15  
26 P17  
28 P19  
30 P21  
32 P23  
34 P25  
36 FLM (V SYS)  
38 LP (H SYS)  
40 ENABKL  
42 P27  
44 P29  
46 P31  
48 P33  
50 P35  
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Serial ports (CN16, CN11)  
The SBC-770 offers two serial ports, one RS-232 (CN16) and one  
RS-232/422/485 (CN11). These ports allow you to connect them to  
serial devices (mouse, printers, etc.).  
COM2 RS-232/422/485 serial ports (CN11)  
COM2 RS-232/422/485 serial port (CN11)  
PIN  
COM2 1  
SIGNAL  
DCDB  
PIN  
6
SIGNAL  
DSRB  
(422TXD-/485DATA-)  
2
RXDB  
7
RTSB  
(422TXD+/485DATA+)  
3
4
5
TXDB  
(422RXD+)  
DTRB  
(422RXD-)  
GND  
8
CTSB  
RIB  
9
10  
N.C.  
100Base-Tx Ethernet connector  
(CN17)  
This 100Base-Tx Ethernet connector CN17 is a standard RJ-45  
connector.  
The onboard Realtek RTL8139B fast Ethernet controller supports  
10Mb/s and 100 Mb/s N-way auto-negotiation operation.  
Chapter 2 Installation 39  
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Keyboard and PS/2 mouse connector  
(CN18, CN13)  
The mainboard provides a keyboard connector which supports  
both a keyboard and a PS/2 style mouse. In most cases, especially  
in embedded applications, a keyboard is not used. The standard  
PC/AT BIOS will report an error or fail during power-on-self-test  
(POST) after a reset if the keyboard is not present. The main-  
board BIOS Advanced setup menu allows you to select "Present"  
or "Absent" under the "System Keyboard" section. This allows  
no-keyboard operation in embedded system applications without  
the system halting under POST (power-on-self-test).  
Keyboard and PS/2 mouse connector (CN18)  
Pin  
1
2
Signal  
KB DATA  
MS DATA  
GND  
3
4
Vcc  
5
6
KB CLOCK  
MS CLOCK  
Internal keyboard connector (CN13)  
Pin  
1
2
Signal  
KB CLOCK  
KB DATA  
N.C.  
3
4
GND  
5
Vcc  
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DiskOnChip socket (U34)  
The DiskOnChip 2000 family of products provides a single chip  
solid-state flash disk in a standard 32-pin DIP package. The  
DiskOnChip 2000 is a solid-state disk with no moving parts,  
resulting in a significant reduction in power consumption and an  
increase in reliability. The DiskOnChip is a small plug and play  
Flash disk. It is easy to use. And it saves integration overhead.  
The DiskOnChip 2000 family of products is available in capacities  
ranging from 2MB up to 144MB, unformatted. In order to manage  
the disk, the DiskOnChip 2000 includes the TrueFFS, M-Systems  
Flash File System proprietary software. The DiskOnChip 2000  
package is pin-to-pin compatible with a standard 32-pin EPROM  
device.  
pin  
Description  
Pin Number  
Direction  
Inputs  
Note  
Name  
A0-A12  
Address bus  
4-12,23,25-27  
A13-A16  
D0-D7  
CE/  
Address bus  
Data bus  
2,3,28,29  
Inputs  
I/O  
1
13-15,17-21  
Chip Enable  
Output Enable  
Write Enable  
Not connected  
Power  
22  
Input  
Input  
Input  
OE /  
OE/  
24  
WE/  
31  
NC  
1.30  
32  
2
VCC  
GND  
Ground  
16  
Note 1: Pins A13 through A16 are not used  
by the MD2200. They are kept for socket  
backward compatibility with ED 1100  
(DiskOnChip 1000)  
Note 2: Pins 1 and 30 are not used by  
MD2200  
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DiskOnChip (DOC) 2000 Installation  
When the DOC is installed correctly, a DOC will work like an HDD  
or an FDD. To install the DOC on the mainboard, follow the  
instructions below:  
1. Plug the DOC into the socket. Make sure pin 1 of the DOC is  
aligned with pin 1 of the socket.  
2. Push the DOC into the socket until it is firmly seated in the  
socket.  
Caution: the DOC may be permanently damage if it is installed  
incorrectly.  
3. Set the jumper for the memory address of the DOC.  
Note:  
The memory shadow function sometimes will create conflicts with  
the memory window. You should disable the memory shadow from  
the BIOS SETUP if the DOC cannot be accessed.  
Configure DOC as a boot device  
To configure a DOC as a boot drive, you should copy the operating  
system files onto the DOC. The following procedure is an example  
of the initialization process.  
1. Install a DOC into your system.  
2. Insert a bootable floppy disk in drive A: and boot the system.  
3. At the DOS prompt, type SYS C: to transfer the DOS system  
files to the DOC (assuming the DiskOnChip is installed as drive  
C:). Reboot the system.  
4. Go to the BIOS Setup Utility by hitting the <DEL> key. Set the  
type of Primary Master or C: Drive as Not Installed.  
5. Remove the floppy disk from the drive A: and leave the BIOS  
Setup Utility. The system should boot from the DOC.  
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3
Award BIOS Setup  
This chapter describes how to configure  
the BIOS for the system.  
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Starting setup  
The Award BIOS is immediately activated when you first turn on  
the computer. The BIOS reads system configuration information in  
CMOS RAM and begins the process of checking out the system  
and configuring it through the power-on self test (POST).  
When these preliminaries are finished, the BIOS seeks an operating  
system on one of the data storage devices (hard drive, floppy  
drive, etc.). The BIOS launches the operating system and hands  
control of system operations to it.  
During POST, you can start the Setup program in one of two ways:  
1.By pressing Del immediately after switching the system on, or  
2.By pressing Del or pressing Ctrl-Alt-Esc when the following  
message appears briefly at the bottom of the screen during POST:  
TO ENTER SETUP BEFORE BOOT PRESS DEL KEY  
If the message disappears before you respond and you still wish to  
enter Setup, restart the system to try again by turning it OFF then  
ON or pressing the RESET button on the system case. You may  
also restart by simultaneously pressing Ctr-Alt-Del. If you do not  
press the keys at the correct time and the system does not boot, an  
error message appears and you are again asked to  
PRESS F1 TO CONTINUE, DEL TO ENTER SETUP  
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Setup keys  
These keys helps you navigate in Setup:  
Up arrow  
Down arrow  
Left arrow  
Right arrow  
Esc  
Move to previous item  
Move to next item  
Move to the item in the left hand  
Move to the item in the right hand  
Main Menu: Quit and not save changes into  
CMOS RAM  
Other pages: Exit current page and return to  
Main Menu  
PgDn/+  
PgDn/-  
F1  
Increase the numeric value or make  
changes  
Decrease the numeric value or make  
changes  
General help, only for Status Page Setup  
Menu and Option Page Setup Menu  
F2  
Change color from total 16 colors. F2 to  
select color forward, Shift-F2 to select color  
backward  
F3  
F4  
F5  
Calendar, only for Status Page Setup Menu  
Reserved  
Restore the previous CMOS value from  
CMOS, only for Option Page Setup Menu  
Load the default CMOS RAM value from  
BIOS default table, only for Option Page  
Setup Menu  
F6  
F7  
F8  
Load the default  
Reserved  
F9  
Reserved  
F10  
Save all the CMOS changes, only for Main  
Menu  
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Getting help  
Press F1 to pop up a small help window that describes the  
appropriate keys to use and the possible selections for the  
highlighted item. To exit the Help Window press Esc or the F1  
key again.  
In Case of Problems  
If, after making and saving system changes with Setup, you  
discover that your computer no longer is able to boot, the Award-  
BIOS supports an override to the CMOS settings that resets your  
system to its default configuration.  
You can invoke this override by immediately pressing Insert; when  
you restart your computer. You can restart by either using the ON/  
OFF switch, the RESET button or by pressing Ctrl-Alt-Delete.  
The best advice is to alter only settings that you thoroughly  
understand. In particular, do not change settings in the Chipset  
screen without a good reason. The Chipset defaults have been  
carefully chosen by Award Software or your system manufacturer  
for the best performance and reliability. Even a seemingly small  
change to the Chipset setup may causing the system to become  
unstable.  
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Main setup Menu  
Standard CMOS Options in the original PC AT-compatible  
BIOS.  
BIOS Features  
Award Software enhanced BIOS options.  
Chipset Features Options specific to your system chipset.  
Power  
Management  
Advanced Power Management (APM)  
options.  
PnP/PCI  
Configuration  
Plug and Play standard and PCI Local Bus  
configuration options.  
Integrated  
Peripherals  
I/O subsystems that depend on the inte-  
grated peripherals controller in your  
system.  
Supervisor/User Change, set, or disable a password. In  
Password Setting BIOS versions that allow separate user and  
supervisor passwords, only the supervisor  
password permits access to Setup. The  
user password generally allows only  
power-on access.  
IDE HDD Auto  
Detection  
Automatically detect and configure IDE hard  
disk parameters.  
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Load BIOS  
Defaults  
BIOS defaults are factory settings for the  
most stable, minimal-performance system  
operations.  
Load Setup  
Defaults  
Save & Exit  
Setup  
Setup defaults are factory settings for  
optimal-performance system operations.  
Save settings in nonvolatile CMOS  
RAM and exit Setup.  
Exit Without  
Save  
Abandon all changes and exit Setup.  
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Standard CMOS setup  
When you choose the STANDARD CMOS SETUP option from the  
INITIAL SETUP SCREEN menu, the screen below is displayed.  
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This standard setup menu allows users to configure system  
components such as the date, time, hard disk drive, floppy drive,  
display, and memory. Online help for each field can be accessed by  
pressing F1.  
Date and Time Configuration  
The BIOS determines the day of the week from the other date  
information. This field is for information only.  
Press the left or right arrow key to move to the desired field (date,  
month, year). Press the PgUp/- or PgDn/+ key to increment the  
setting, or type the desired value into the field.  
The time format is based on the 24-hour military-time clock. For  
example, 1 p.m. is 13:00:00. Press the left or right arrow key to move  
to the desired field. Press the PgUp/- or PgDn/+ key to increment  
the setting, or type the desired value into the field.  
HARD DISKS  
The BIOS supports up to four IDE drives. This section does not  
show information about other IDE devices, such as a CD-ROM  
drive, or about other hard drive types, such as SCSI drives.  
NOTE: We recommend that you select type AUTO for all drives.  
The BIOS can automatically detect the specifications and optimal  
operating mode of almost all IDE hard drives. When you select  
type AUTO for a hard drive, the BIOS detects its specifications  
during POST, every time the system boots.  
If you do not want to select drive type AUTO, other methods of  
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selecting the drive type are available:  
1.Match the specifications of your installed IDE hard drive(s) with  
the preprogrammed values for drive types 1 through 45.  
2.Select USER and enter values into each drive parameter field.  
3.Use the IDE HDD AUTO DECTECTION function in Setup.  
Here is a brief explanation of drive specifications:  
•Type: The BIOS contains a table of pre-defined drive types. Each  
defined drive type has a specified number of cylinders,  
number of heads, write precompensation factor, landing  
zone, and number of sectors. Drives whose specifications  
do not accommodate any pre-defined type are classified as  
type USER.  
•Size: Disk drive capacity (approximate). Note that this size is  
usually slightly greater than the size of a formatted disk  
given by a disk-checking program.  
• Cyls: Number of cylinders  
• Head: Number of heads  
• Precomp: Write precompensation cylinder  
• Landz: Landing zone  
• Sector: Number of sectors  
• Mode: Auto, Normal, large, or LBA  
- Auto: The BIOS automatically determines the optimal mode.  
- Normal: Maximum number of cylinders, heads, and sectors  
supported are 1024, 16, and 63.  
- Large: For drives that do not support LBA and have more than  
1024 cylinders.  
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- LBA (Logical Block Addressing): During drive accesses, the  
IDE controller transforms the data address described by  
sector, head, and cylinder number into a physical block  
address, significantly improving data transfer rates. For  
drives with greater than 1024 cylinders.  
Drive A  
Drive B  
Select the correct specifications for the diskette drive(s) installed in  
the computer.  
None  
No diskette drive installed  
360K, 5.25 in  
5-1/4 inch PC-type standard drive; 360  
kilobyte capacity  
1.2M, 5.25 in  
720K, 3.5 in  
1.44M, 3.5 in  
2.88M, 3.5 in  
5-1/4 inch AT-type high-density drive; 1.2  
megabyte capacity  
3-1/2 inch double-sided drive; 720 kilobyte  
capacity  
3-1/2 inch double-sided drive; 1.44 mega  
byte capacity  
3-1/2 inch double-sided drive; 2.88 mega  
byte capacity  
LCD & CRT  
This field may appear as an alternative to the Video field. Select  
your video display device:  
LCD  
CRT  
Both  
Liquid crystal display  
Auxiliary monitor  
Display on both devices  
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Pannel:  
This selection item allows user to select LCD BIOS to match the  
LCD types. There are eight LCD types available for users to select  
as their LCD display modes as below:  
Brand name  
Sharp  
Model name  
LX 15X80  
Format  
1024 x 768 DSTN  
640 x 480 MONO  
640 x 480 DSTN  
Sharp  
LM 64183P  
LM 64C35P  
LM 12S40  
Sharp  
Sharp  
800 x 600 DSTN  
NEC  
NL 6448AC33-10  
LTM 10C209A  
NL 8060AC26-04  
14x03  
640 x 480 TFT (12 bits)  
640 x 480 (18 bits) TFT  
800 x 600 TFT  
Toshiba  
NEC  
Sharp  
1024x768 TFT (36 bits)  
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Halt On  
During the power-on-self-test (POST), the computer stops if the  
BIOS detects a hardware error. You can tell the BIOS to ignore  
certain errors during POST and continue the boot-up process.  
These are the selections:  
• No errors: POST does not stop for any errors.  
• All errorsIf: the BIOS detects any non-fatal error, POST stops  
and prompts you to take corrective action.  
• All, But Keyboard: POST does not stop for a keyboard error, but  
stops for all other errors.All, But DiskettePOST does not stop for  
diskette drive errors, but stops for all other errors.  
• All, But Disk/Key: POST does not stop for a keyboard or disk  
error, but stops for all other errors.  
Memory  
You cannot change any values in the Memory fields; they are only  
for your information. The fields show the total installed random  
access memory (RAM) and amounts allocated to base memory,  
extended memory, and other (high) memory. RAM is counted in  
kilobytes (KB: approximately one thousand bytes) and megabytes  
(MB: approximately one million bytes).  
RAM is the computer's working memory, where the computer  
stores programs and data currently being used, so they are  
accessible to the CPU. Modern personal computers may contain up  
to 64 MB, 128 MB, or more.  
•Base Memory  
Typically 640 KB. Also called conventional memory. The DOS  
operating system and conventional applications use this area.  
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•ExtendedMemory  
Above the 1-MB boundary. Early IBM personal computers could  
not use memory above 1 MB, but current PCs and their software  
can use extended memory.  
•Other Memory  
Between 640 KB and 1 MB; often called High memory. DOS may  
load terminate-and-stay-resident (TSR) programs, such as device  
drivers, in this area, to free as much conventional memory as  
possible for applications. Lines in your CONFIG.SYS file that start  
with LOADHIGH load programs into high memory.  
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BIOS features setup  
By choosing the BIOS FEATURES SETUP option from the INITIAL  
SETUP SCREEN menu, the screen below is displayed.  
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The displayed configuration is based on the manufacturer's SETUP  
DEFAULTS settings.  
Virus Warning  
When enabled, you receive a warning message if a program  
(specifically, a virus) attempts to write to the boot sector or the  
partition table of the hard disk drive. You should then run an anti-  
virus program. Keep in mind that this feature protects only the boot  
sector, not the entire hard drive.  
NOTE: Many disk diagnostic programs that access the boot  
sector table can trigger the virus warning message. If you plan to  
run such a program, we recommend that you first disable the virus  
warning.  
CPU Internal Cache/External Cache  
Cache memory is additional memory that is much faster than  
conventional DRAM (system memory). CPUs from 486-type and up  
contain internal cache memory, and most, but not all, modern PCs  
have additional (external) cache memory. When the CPU requests  
data, the system transfers the requested data from the main DRAM  
into cache memory, for even faster access by the CPU.  
The External Cache field may not appear if your system does not  
have external cache memory.  
CPU L2 Cache ECC Checking  
When you select Enabled, memory checking is enable when the  
external cache contains ECC SRAMs.  
Quick Power On Self Test  
Select Enabled to reduce the amount of time required to run the  
power-on-self-test (POST). A quick POST skips certain steps. We  
recommend that you normally disable quick POST. Better to find a  
problem during POST than lose data during your work.  
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Boot Sequence  
The original IBM PCs loaded the DOS operating system from drive  
A (floppy disk), so IBM PC-compatible systems are designed to  
search for an operating system first on drive A, and then on drive C  
(hard disk). However, the BIOS now offers many boot sequence  
options.  
Swap Floppy Drive  
This field is effective only in systems with two floppy drives.  
Selecting enabled assigns physical drive B to logical drive A, and  
physical drive A to logical drive B.  
Boot Up Floppy Seek  
When Enabled, the BIOS tests (seeks) floppy drives to determine  
whether they have 40 or 80 tracks. Only 360-KB floppy drives have  
40 tracks; drives with 720 KB, 1.2 MB, and 1.44 MB capacity all  
have 80 tracks. Because very few modern PCs have 40-track floppy  
drives, we recommend that you set this field to Disabled to save  
time.  
Boot Up NumLock Status  
Toggle between On or Off to control the state of the NumLock key  
when the system boots. When toggled On, the numeric keypad  
generates numbers instead of controlling cursor operations.  
Gate A20 Option  
Gate A20 refers to the way the system addresses memory above 1  
MB (extended memory). When set to Fast, the system chipset  
controls Gate A20. When set to Normal, a pin in the keyboard  
controller controls Gate A20. Setting Gate A20 to Fast improves  
system speed, particularly with OS/2 and Windows.  
Security Option  
If you have set a password, select whether the password is  
required every time the System boots, or only when you enter  
Setup.  
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PS/2 Mouse Function Control  
If your system has a PS/2 mouse port and you install a serial  
pointing device, select Disabled.  
Shadow  
Software that resides in a read-only memory (ROM) chip on a  
device is called firmware. The AwardBIOS permits shadowing of  
firmware such as the system BIOS, video BIOS, and similar operat-  
ing instructions that come with some expansion peripherals, such  
as, for example, a SCSI adaptor.  
Shadowing copies firmware from ROM into system RAM, where  
the CPU can read it through the 16-bit or 32-bit DRAM bus.  
Firmware not shadowed must be read by the system through the 8-  
bit X-bus. Shadowing improves the performance of the system  
BIOS and similar ROM firmware for expansion peripherals, but it  
also reduces the amount of high memory (640 KB to 1 MB) avail-  
able for loading device drivers, etc.  
Enable shadowing into each section of memory separately. Many  
system designers hardwire shadowing of the system BIOS and  
eliminate a System BIOS Shadow option.  
Video BIOS shadows into memory area C0000-C7FFF. The remain-  
ing areas shown on the BIOS Features Setup screen may be  
occupied by other expansion card firmware. If an expansion  
peripheral in your system contains ROM-based firmware, you need  
to know the address range the ROM occupies to shadow it into the  
correct area of RAM.  
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CHIPSET features setup  
By choosing the CHIPSET FEATURES SETUP option from the  
INITIAL SETUP SCREEN menu, the screen below is displayed.  
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The displayed configuration is based on the manufacturer's SETUP  
DEFAULTS settings.  
This section allows you to configure the system based on the  
specific features of the installed chipset. This chipset manages bus  
speeds and access to system memory resources, such as SDRAM.  
It also coordinates communications between the conventional ISA  
bus and the PCI bus. It must be stated that these items should  
never need to be altered. The default settings have been chosen  
because they provide the best operating conditions for your  
system. The only time you might consider making any changes  
would be if you discovered that data was being lost while using  
your system.  
Because of the complexity and technical nature of some of the  
options, not all of the options are described here.  
SDRAM RAS-to-CAS Delay  
This field lets you control the number of DCLKs between a Row  
Activate command and a read or write command.  
SDRAM RAS Precharge Time  
The precharge time is the number of cycles it takes for the RAS to  
accumulate its charge before DRAM refresh. If insufficient time is  
allowed, refresh may be incomplete and the DRAM may fail to  
retain data. This field applies only if synchronous DRAM is  
installed in the system.  
SDRAM CAS Latency Time  
When synchronous DRAM is installed, you can control the  
number of CLKs between when the SDRAMs sample a read  
command and when the contoller samples read data from the  
SDRAMs. Do not reset this field from the default value specified  
by the system designer.  
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SDRAM Precharge Control  
When Enabled, all CPU cycles to SDRAM result in an All Banks  
Precharge Command on the SDRAM interface.  
DRAM Data Integrity Mode  
Select Non-ECC or ECC (error-correcting code), according to the  
type of installed DRAM.  
System BIOS Cacheable  
Selecting Enabled allows caching of the system BIOS ROM at  
F0000h-FFFFFh, resulting in better system performance. However,  
if any program writes to this memory area, a system error may  
result.  
Video BIOS Cacheable  
Selecting Enabled allows caching of the video BIOS ROM at  
C0000h to C7FFFh, resulting in better video performance. However,  
if any program writes to this memory area, a system error may  
result.  
Video RAM Cacheable  
Selecting Enabled allows caching of the video memory (RAM) at  
A0000h to AFFFFh, resulting in better video performance. Howev-  
er, if any program writes to this memory area, a memory access error  
may result.  
8/16 Bit I/O Recovery Time  
The I/O recovery mechanism adds bus clock cycles between PCI-  
originated I/O cycles to the ISA bus. This delay takes place  
because the PCI bus is so much faster than the ISA bus.  
These two fields let you add recovery time (in bus clock cycles) for  
16-bit and 8-bit I/O.  
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Memory Hole at 15M-16M  
You can reserve this area of system memory for ISA adapter ROM.  
When this area is reserved, it cannot be cached. The user informa-  
tion of peripherals that need to use this area of system memory  
usually discusses their memory requirements.  
Passive Release  
When Enabled, CPU to PCI bus accesses are allowed during  
passive release. Otherwise, the arbiter only accepts another PCI  
master access to local DRAM.  
Delayed Transaction  
The chipset has an embedded 32-bit posted write buffer to support  
delay transactions cycles. Select Enabled to support compliance  
with PCI specification version 2.1.  
Auto Detect DIMM/PCI Clk  
When the Auto Detect DIMM/PCI clk enable, the Utility will  
automatically detect the DIMM/PCI clock in your system.  
Spread Spectrum  
When the system clock generator pulses, the extreme values of the  
pulse generate excess EMI. Enabling pulse spectrum spread  
modulation changes the extreme values from spikes to flat curves,  
thus reducing EMI. This benefit may in some cases be outweighed  
by problems with timing-critical devices, such as a clock-sensitive  
SCSI device  
IN0-IN6(V)  
These fields display the current voltage of up to seven voltage  
input lines, if your computer contains a monitoring system.  
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Power management setup  
By choosing the POWER MANAGEMENT option from the  
INITIAL SETUP SCREEN menu, the screen below is displayed.  
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The displayed configuration is based on the manufacturer's SETUP  
DEFAULTS settings.  
Power Management  
This option allows you to select the type (or degree) of power  
saving for Doze, Standby, and Suspend modes.  
This table describes each power management mode:  
Max Saving  
User Define  
Min Saving  
Maximum power savings. Only Available for  
SL CPUs. Inactivity period is 1 minute in  
each mode.  
Set each mode individually. Select time-out  
periods in the section for each mode,  
below.  
Minimum power savings. Inactivity period is  
1 hour in each mode (except the hard  
drive).  
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PM Control by APM  
If Advanced Power Management (APM) is installed on your  
system, selecting Yes gives better power savings.  
Video Off Method  
Determines the manner in which the monitor is blanked.  
V/H SYNC+Blank System turns off vertical and horizontal  
synchronization ports and writes blanks to  
the video buffer.  
DPMS Support  
Select this option if your monitor supports  
the Display Power Management Signaling  
(DPMS) standard of the Video Electronics  
Standards Association (VESA). Use the  
software supplied for your video subsystem  
to select video power management values.  
System only writes blanks to the video  
buffer.  
Blank Screen  
Video Off After  
As the system moves from lesser to greater power-saving modes,  
select the mode in which you want the monitor to blank.  
MODEM Use IRQ  
Name the interrupt request (IRQ) line assigned to the modem (if  
any) on your system. Activity of the selected IRQ always awakens  
the system.  
Doze Mode  
After the selected period of system inactivity, the CPU clock  
throttles to a small percentage of its duty cycle — between 10  
percent and 25 percent for most chipsets. All other devices still  
operate at full speed.  
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Standby Mode  
After the selected period of system inactivity, the CPU clock stops,  
the hard drive enters an idle state, and the L2 cache enters a power-  
save mode. All other devices still operate at full speed.  
Suspend Mode  
After the selected period of system inactivity, the chipset enters a  
hardware suspend mode, stopping the CPU clock and possibly  
causing other system devices to enter power management modes.  
HDD Power Down  
After the selected period of drive inactivity, any system IDE  
devices compatible with the ATA-2 specification or later power  
manage themselves, putting themselves into an idle state after the  
specified timeout and then waking themselves up when accessed.  
Throttle Duty Cycle  
When the system enters Doze mode, the CPU clock runs only part  
of the time. You may select the percent of time that the clock runs.  
VGA Active Monitor  
When Enabled, any video activity restarts the global timer for  
Standby mode.  
IRQ8 Break [Event From] Suspend  
You can select Enabled or Disabled for monitoring of IRQ8 (the  
Real Time Clock) so it does not awaken the system from Suspend  
mode.  
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Reload Global Timer Events  
When Enabled, an event occurring on each device listed below  
restarts the global timer for Standby mode.  
IRQ3-7, 9-15, NMI  
Primary IDE 0  
Primary IDE 1  
Secondary IDE 0  
Secondary IDE 1  
Floppy Disk  
Serial Port  
Parallel Port  
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PNP/PCI configuration setup  
By choosing the PNP/PCI CONFIGURATION SETUP option from  
the initial SETUP SCREEN menu, the screen below is displayed.  
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The displayed configuration is based on the manufacturer's SETUP  
DEFAULTS settings.  
NOTE: This chapter describes all fields offered by Award Software  
in this screen. Your system board designer may omit or modify  
some fields.  
PNP OS Installed  
Select Yes if the system operating environment is Plug-and-Play  
aware (e.g., Windows 95).  
Resources Controlled By  
The Plug and Play AwardBIOS can automatically configure all the  
boot and Plug and Play-compatible devices. If you select Auto, all  
the interrupt request (IRQ) and DMA assignment fields disappear,  
as the BIOS automatically assigns them.  
Reset Configuration Data  
Normally, you leave this field Disabled. Select Enabled to reset  
Extended System Configuration Data (ESCD) when you exit Setup if  
you have installed a new add-on and the system reconfiguration  
has caused such a serious conflict that the operating system  
cannot boot.  
IRQ n Assigned to  
When resources are controlled manually, assign each system  
interrupt as one of the following types, depending on the type of  
device using the interrupt:  
Legacy ISA Devices compliant with the original PC AT bus  
specification, requiring a specific interrupt (such as IRQ4 for serial  
port 1).  
PCI/ISA PnP Devices compliant with the Plug and Play standard,  
whether designed for PCI or ISA bus architecture.  
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DMA n Assigned to  
When resources are controlled manually, assign each system DMA  
channel as one of the following types, depending on the type of  
device using the interrupt:  
Legacy ISA Devices compliant with the original PC AT bus  
specification, requiring a specific DMA channel  
PCI/ISA PnP Devices compliant with the Plug and Play standard,  
whether designed for PCI or ISA bus architecture.  
Assign IRQ for VGA  
If you are not using your system's VGA controller, select Disabled  
to free the IRQ resource.  
Used Mem base addr  
Select a base address for the memory area used by any peripheral  
that requires high memory.  
Assign IRQ for USB  
Select Enabled if your system has a USB controller and you have  
one or more USB devices connected. If you are not using your  
system’s USB controller, select Disabled to free the IRQ resource.  
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Load BIOS defaults/Load setup  
defaults  
LOAD BIOS DEFAULTS loads the default system values directly  
from ROM. The BIOS DEFAULTS provides the most stable  
settings, though they do not provide optimal performance. LOAD  
SETUP DEFAULTS, on the other hand, provides for maximum  
system performance. If the stored record created by the setup  
utility becomes corrupted (and therefore unusable), BIOS defaults  
will load automatically when you turn the system on.  
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Integrated peripherals setup  
By choosing the INTEGRATD PERIPHERALS option from the  
initial SETUP SCREEN menu, the screen below is displayed.  
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The displayed configuration is based on the manufacturer's SETUP  
DEFAULSTS settings.  
IDE HDD Block Mode  
Select Enabled only if your hard drives support block mode.  
IDE Primary/Secondary Master/Slave PIO  
The four IDE PIO (Programmed Input/Output) fields let you set a  
PIO mode (0-4) for each of up to four IDE devices that the internal  
PCI IDE interface supports. Modes 0 through 4 provide succes-  
sively increased performance. In Auto mode, the system automati-  
cally determines the best mode for each device.  
IDE Primary /Secondary Master/Slave UDMA  
UDMA (Ultra DMA) is a DMA data transfer protocol that utilizes  
ATA commands and the ATA bus to allow DMA commands to  
transfer data at a maximum burst rate of 33 MB/s. When you select  
Auto in the four IDE UDMA fields (for each of up to four IDE  
devices that the internal PCI IDE interface supports), the system  
automatically determines the optimal data transfer rate for each IDE  
device.  
On-Chip PCI IDE Primary/Secondary  
The system chipset contains a PCI IDE interface with support for  
two IDE channels. Select Enabled to activate the primary and/or  
secondary IDE interface. Select Disabled to deactivate this inter-  
face, if you install a primary and/or secondary add-in IDE interface.  
USB Keyboard Support  
Select Enabled if your system contains a Universal Serial Bus  
(USB) controller and you have a USB keyboard.  
Onboard FDC Controller  
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Select Enabled if your system has a floppy disk controller (FDC)  
installed on the system board and you wish to use it. If you install  
an add-in FDC or the system has no floppy drive, select Disabled in  
this field.  
Onboard Serial Ports (1, 2)  
Select a logical COM port address for the first and second serial  
ports.  
RxD, TxD Active  
Consult your IR peripheral documentation to select the correct  
setting of the TxD and RxD signals.  
ECP Mode Use DMA  
Select a DMA channel for the port.  
EPP Mode select  
Select EPP port type 1.7 or 1.9.  
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Supervisor/User password setting  
You can set either SUPERVISOR or USER PASSWORD, or both of  
them. The difference between the two is that the supervisor  
password allows unrestricted access to enter and change the  
options of the setup menus, while the user password only allows  
entry to the program, but not modify options.  
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When you select this function, a message appears at the center of  
the screen:  
ENTER PASSWORD:  
Type the password, up to eight characters, and press Enter. Typing  
a password clears any previously entered password from CMOS  
memory.  
Now the message changes:  
CONFIRM PASSWORD:  
Again, type the password and press Enter.  
To abort the process at any time, press Esc.  
In the Security Option item in the BIOS Features Setup screen,  
select System or Setup:  
System Enter a password each time the system boots and when  
ever you enter Setup.  
Setup  
Enter a password when ever you enter Setup.  
NOTE: To clear the password, simply press Enter when asked to  
enter a password. Then the password function is disabled.  
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IDE HDD auto detection  
The IDE HDD AUTO DETECTION utility can automatically detect  
the IDE hard disk installed in your system. You can use it to self-  
detect and/or correct the hard disk type configuration. You need to  
repeat the setup for each of the IDE combinations:  
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Save & exit setup  
If you select this option and press <ENTER>, the values entered in  
the setup utility will be recorded in the chipset's CMOS memory.  
The microprocessor will check this every time you turn your  
system on and compare this to what it finds as it checks the  
system. This record is required for the system to operate.  
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4
Flat Panel/CRT  
Controller Display  
Drivers and Utilities  
This chapter provides information about:  
• Driver types and installation  
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Software drivers  
This chapter describes the operation and installation of the display  
drivers supplied on the Supporting CD-ROM that are shipped with  
your product.  
The onboard VGA adapter is based on the CHIPS VGA Flat Panel/CRT  
controller and is fully IBM VGA compatible. This controller offers a  
large set of extended functions and higher resolutions. If you intend to  
use your VGA adapter in standard VGA modes only, you do not need  
to install any of these drivers. Since your VGA adapter is fully compat-  
ible, it does not require any special drivers to operate in standard  
modes.  
The purpose of the enclosed software drivers is to take advantage of  
the extended features of the CHIPS VGA Flat Panel/CRT controller.  
Hardware configuration  
Some of the high-resolution drivers provided in this package will work  
only in certain system configurations. If a driver does not display  
correctly, try the following:  
1. Change the display controller to CRT-only mode, rather than flat  
panel or simultaneous display mode. Some high-resolution drivers  
will display correctly only in CRT mode.  
2. If a high-resolution mode is not supported on your system, try  
using a lower-resolution mode. For example, 1024 x 768 mode will  
not work on some systems, but 800 x 600 mode is supported on  
most.  
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Necessary prerequisites  
The instructions in this manual assume that you understand elementa-  
ry concepts of MS-DOS and the IBM Personal Computer. Before you  
attempt to install any driver or utility, you should:  
• Know how to copy files from a CD-ROM to a directory on the hard  
disk  
• Understand the MS-DOS directory structure  
If you are uncertain about any of these concepts, please refer to the  
DOS or OS/2 user reference guides for more information before you  
proceed with the installation.  
Before you begin  
Make sure you know the version of the application for which you are  
installing drivers. The Supporting CD-ROM contain drivers for several  
versions of certain applications. For your driver to operate properly,  
you must install the driver for your version of the application program.  
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Windows® 95  
Ò
Ò
These drivers are designed to work with Microsoft Windows . You  
just install these drivers through the Windows operating system.  
Ò
Driver installation  
Ò
1. Install Windows 95 as you normally would for a VGA display.  
Click the Start button, go to Settings and click on Control  
Panel. Choose the Display icon and double click on the icon. In  
the Display Properties window, show as figure 1:  
figure 1  
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Click the setting buttom, then click the Advanced Properties icon  
into the Advanced Display properties windows, show as figure2:  
figure 2  
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click on Change Display Type. In the Change Display Type  
window, click on the Change button under Adapter Type into the  
select Device window show as figure(3):This will bring up the  
Select Device window.  
figure 3  
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2. Place the Supporting CD-ROM in your CD-ROM drive.  
figure 4  
In the Select Device window, click on Have Disk, Select Browse,  
and find the Win95 driver "chips95.inf" in the Supporting CD-  
ROM with the following path, and then click OK.  
cd-rom: \CD-ROM\model name\driver\vga driver\win95\  
"cd-rom:": the drive letter of your CD-ROM drive  
"model name": the model number of your product  
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The name of the Chips And Techn "69000 PCI " driver will  
appear highlighted in the Models list boxfhow as figure. Click  
OK to start the driver installation show as figure 6:  
figure 6  
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3. Once the installation is complete, the Advanced display Proper-  
ties window will reappear. Show as figure (7):  
figure 7  
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Click on close to close the window. Then the Display Properties  
window will reappear. Show as figure (8):  
figure 8  
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Click on Apply. Restart the system for the new settings to take  
effect, show as figure (9):  
figure 9  
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Windows® NT 3.51  
Ò
Ò
These drivers are designed to work with Microsoft Windows .  
Driver installation  
Ò
1. Install Windows NT 3.51 as you normally would for a VGA  
display. Click the Star buttom, go to Settings and click on Control  
Panel icon. Then choose the Display and double click on the icon.  
In the Display Properties window, click the Setting buttom, then  
click the Display Type buttom into the Display Type windows, then  
click on Change buttom from the Adapter Type icon. And click on  
Have Disk buttom in the change display window.  
2. Place the Supporting CD-ROM into your CD-ROM drive.  
and type:  
cd-rom: \CD ROM\model name\drive\vga drive\  
win98 nt\windows.nt\nt35\Oemsetup.inf  
"cd-rom:": the drive letter of your CD-ROM drive  
"model name": the model number of your product  
Select the adapter "Chips and Tech 69000PCI" and click OK.  
Click on Install to install the selected driver. Once the installation is  
complete, shut down and restart the system.  
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Windows® NT 4.0  
Driver installation  
Ò
1. Install Windows NT 4.0 as you normally would for a VGA  
display. Click the Star buttom, go to Settings and click on Control  
Panel icon. Then choose the Display and double click on the icon.  
In the Display Properties window, click the Setting buttom, then  
click the Display Type buttom into the Display Type windows, then  
click on Change buttom from the Adapter Type icon. And click on  
Have Disk buttom in the change display window.  
2. Place the Supporting CD-ROM into your CD-ROM dirve. In the  
Select Device window, click on Have Disk, select "Browse" and  
find the NT 4.0 driver from:  
cd-rom : \CD ROM\model name\dirver\vga driver\  
win98 nt\windows.nt\nt40\Oemsetup.inf  
"cd-rom:": the drive letter of your CD-ROM drive  
"model name": the model number of your product  
and then click OK. The name of the Chips and Technologies, Inc.  
Video Controller driver will appear highlighted in the Modules list  
box. Select Chips and Tech. 69000 and Click OK. Click OK to start  
the driver installation.  
3. Once the installation is complete, the Change Display Type window  
will reappear. Click on close to close the window. Then the  
Display Properties window will reappear. Click on Apply. Restart  
the system for the new settings to take effect.  
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5
Ethernet Software  
Configuration  
This chapter describes how to configure  
the Etherent Card to match your applica-  
tion requirements.  
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Ethernet software configuration  
The onboard Ethernet interface supports all major network  
operating systems. I/O addresses and interrupts are easily  
configured via the Award BIOS Setup. To configure the  
medium type, to view the current configuration, or to run  
diagnostics, please refer to the following instruction:  
1. Power the mainboard on. Ensure that the RSET8139.EXE file  
is located in the working drive.  
2. At the prompt, type RSET8139.EXE and press <ENTER>.  
The Ethernet configuration program will then be displayed.  
3. This simple screen shows all the available options for the  
Ethernet interface. Just highlight the option you wish to  
change by using the Up and DOWN keys. To change a  
selected item, press <ENTER>, and a screen will appear with  
the available options. Highlight your option and press  
<ENTER>. Each highlighted option has a helpful message  
guide displayed at the bottom of the screen for additional  
information.  
4. After you have made your selections and the configuration  
is what you want, press <ESC>. A prompt will appear  
asking if you want to save the configuration. Press "Y" if  
you want to save.  
The Ethernet Setup Menu also offers three very useful diagnos-  
tic functions. These are:  
1. Run EEPROM test  
2. Run Diagnostics on Board  
3. Run Diagnostics on Network  
Each option has its own display screen which shows the format  
and result of any diagnostic tests undertaken.  
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A
Programming the  
Watchdog Timer  
The mainboard is equipped with a  
watchdog timer that resets the CPU or  
generates an interrupt if processing comes  
to a standstill for whatever reason. This  
feature ensures system reliability in  
industrial stand-alone and unmanned  
environments.  
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Programming the watchdog timer  
How to program the WATCHDOG TIMER  
1. To set the time-out interval of watchdog timer:  
-- output the desired value to port 0x443. Since the data is of 1  
byte, the maximum value will be 255. In our design 2 ~ 255 will  
denote 2 ~ 255 sec.  
outportb(0x443, 30); // set watchdog to 30 seconds  
2. To set the time-out event:  
-- output data to prot 0x444,  
• 0: reset system  
• 1, 2, 3: IRQ 10, 15, 11 respectively  
• 4: NMI  
e.g.  
outportb(0x444, 0); // set time-out event to reset-system  
3. To disable watchdog timer:  
-- output value 0 to port 0x443  
outportb(0x443, 0); // disable watchdog timer  
4. To ebable or refresh watchdog timer(the watchdog timer will  
return to its initial value, then count down):  
-- access the I/O port 0x443, e.g.  
outportb(0x443, data); // refresh watchdog timer  
* note: if you want to refresh the watchdog timer, you have to  
disable it first.  
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Demo program  
outportb(0x444, 0):  
outportb(0x443x 10);  
customer_job();  
// set time-out event to reset-system  
// set time-out interval to 10 seconds  
// execute your job here, be sure your  
job will finished within 10 seconds  
outportb(0x443, 0);  
// refresh watchdog timer, otherwise  
the system will reset after time-out  
outputb(0x443, 20);  
// set time-out interval to 20 seconds  
// another job finished in 20 seconds  
// disable watchdog timer  
another_job();  
outportb(0x443, 0)  
...  
...  
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