AAEON SBC-492 SBC-492 User Manual 1st edition

SBC-492

Full-size 486 PCI/ISA-bus CPU Card

with SVGA interface

Copyright Notice

This document is copyrighted, 1998 by AAEON Technology Inc.
All rights are reserved. AAEON T echnology Inc. 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 AAEON Technology Inc. Information provided in
this manual is intended to be accurate and reliable. However,
AAEON Technology Inc. assumes no responsibility for its use, nor
for any infringements upon the rights of third parties which may
result from its use.

Acknowledgements

ALI is a trademark of Acer Laboratories, Inc.
AMD is a trademark of Advanced Micro Devices, Inc.
AMI is a trademark of American Megatrends, Inc.
IBM, PC/A T , PS/2, OS/2 and VGA are trademarks of International
Business Machines Corporation.
Intel and Pentium are trademarks of Intel Corporation.
Microsoft Windows® is a registered trademark of Microsoft Corp.
SMC is a trademark of Standard Microsystems Corporation.
TGUI9440GUI is a trademark of Trident Microsystems, Inc.

All other product names or trademarks are properties of their
respective owners.

Part No. 2007492000 SBC-492 1st Edition

Printed in Taiwan July 1998

Packing list

Before you begin installing your card, please make sure that the
following materials have been shipped:

• 1 SBC-492 CPU card

• 1 6-pin mini-DIN dual outlet adapter for keyboard and PS/2
mouse

• 2 hard disk drive (IDE) interface cables (40 pin)

• 1 floppy disk drive interface cable (34 pin)

• 1 parallel port adapter (26 pin) and COM2 adapter (9 pin) kit

• 1 utility disk (Flash BIOS program, W atchdog for W indows

Library , and Demo Program)

• 4 utility disks with SVGA utility programs

• PC/104 expansion connector converter (pin headers)

• PC/104 module mounting supports

If any of these items are missing or damaged, contact your distribu­tor or sales representative immediately .

Contents

Chapter 1: General Information ................................... 1

Introduction ........................................................................... 2

Features.................................................................................. 3

Specifications ......................................................................... 4

Board layout .......................................................................... 6

Card dimensions .................................................................... 7

Chapter 2: Installation .................................................. 9

Jumpers and connectors .................................................... 1 0

Locating jumpers and connectors .................................... 1 1

Setting jumpers ................................................................... 1 2

Safety precautions ............................................................... 1 3

Installing the CPU ............................................................... 14

Installing the CPU ................................................................1 4

Removing a CPU .................................................................14

SIMM Module Installation Table ..................................... 15

IDE hard drive connections .............................................. 1 6

Connecting the hard drive.....................................................16

IDE LED (JP2, JP3) ............................................................17

Floppy drive connections ................................................... 1 8

Connecting the floppy drive ..................................................1 8

Parallel port.......................................................................... 19

Installing the retaining bracket..............................................19

Power supply connections ................................................. 2 0

Power supply connector .......................................................20

CPU fan power connector ................................................... 20

Display connections ............................................................ 2 1

On-Board VGA Settings .................................................... 2 2

CPU Vcc select (JP1, JP7) ................................................ 2 2

Keyboard and PS/2 mouse connectors ............................ 2 3

Serial ports ........................................................................... 2 4

RS-232 connections (COM-A, COM-B) .............................24

Serial ports IRQ select (JP18)..............................................25

Flash BIOS Protect (JP11) ................................................ 2 6

Clear CMOS (JP15) ........................................................... 2 6

External Switches and LEDs ............................................. 2 7

Power LED and keylock ......................................................27

External speaker...................................................................27

Reset switch ......................................................................... 28

Turbo LED............................................................................28

Turbo switch .........................................................................2 8

DOC address setting (J100) ............................................. 2 9

DiskOnChip socket (U330) ............................................... 30

Chapter 3: AMI WinBIOS Setup .................................... 31

General information ............................................................ 3 2

Starting WinBIOS setup .......................................................32

WinBIOS main menu............................................................3 2

Using a mouse with WinBIOS setup ....................................33

Using the keyboard with WinBIOS setup.............................33

Setup ..................................................................................... 34

Standard Setup......................................................................3 6

Advanced Setup ...................................................................37

Chipset Setup........................................................................42

Power Management Setup ................................................... 44

PCI/PnP Setup ..................................................................... 4 5

Peripheral Setup ...................................................................49

Utility..................................................................................... 52

Security.................................................................................53

Two Levels of Passwords .................................................... 53

Setting a Password ............................................................... 54

Changing a password ...........................................................55

Anti-virus ..............................................................................55

Default................................................................................... 56

Original .................................................................................56

Optima l .................................................................................56

Fail-Safe ...............................................................................56

Exiting WinBIOS ................................................................ 5 7

Chapter 4: SVGA Setup ............................................... 59

SVGA driver installation .................................................... 6 0

Installing from W indows .......................................................60

Screen Control ..................................................................... 6 2

Advanced features (Virtual Screen Control)........................64

DPMS (Display Power Management Signaling) ............. 6 7

Delay Time ...........................................................................68

Activity Select ......................................................................68

Clock.....................................................................................68

Password Option ..................................................................69

Startup On/Off...................................................................... 69

Default..................................................................................69

Test ....................................................................................... 69

Save ...................................................................................... 69

Display driver Uninstallation ............................................. 7 0

Microsoft Windows NT ...................................................... 7 1

Installation ............................................................................. 71

Microsoft Windows NT 3.5 Installation................................7 1

Microsoft Windows NT4.0 ...................................................72

Procedure to install display drivers: ......................................72

Microsoft Windows 95..........................................................73

Procedure to install display drivers: ......................................73

OS/2......................................................................................74

Procedure to install display drivers: ......................................74

Display Drivers Setting Procedure .......................................7 5

Utilities installation ............................................................. 7 7

Utilities summary ..................................................................78

SMONITOR.........................................................................8 0

TVGACR TC ........................................................................8 1

Software drivers installation .............................................. 8 3

Appendix A: Watchdog Timer Demo Program ........... 85

Programming the watchdog timer .................................... 8 6

Appendix B: Installing PC/104 Modules ....................... 89

Installing PC/104 modules ................................................. 9 0

1

CHAPTER

General

Information

This chapter gives background informa­tion on the SBC-492.

Sections include:

• Card specifications

• Board layout

Chapter 1 General Information 1

Introduction

The SBC-492 is an all-in-one single board 486 computer that includes
an on-board SVGA controller , with PCI-bus and ISA-bus support. It
packs all the functions of an industrial computer with display capabili­ties on a single full-size card. The SBC-492 is fully PC/A T compatible,
so your software will run without modifications.

The SBC-492 is excellent for display-intensive applications. The on­board PCI-bus SVGA controller uses the Trident TGUI9440GUi chipset
with the local PCI-bus to enable 32-bit graphic throughput at up to 33
MHz. Also built in is a standard Feature Connector.

The SBC-492 supports the M-Systems DiskOnChip 2000 (optional)
which is a new generation of high performance single-chip Flash Disk.
It provides a Flash Disk (as a BIOS expansion) which does not require
any bus, slots, or connectors. It is also the optimal solution for Single
Board Computers because of its small size, easy integration, plug-and­play functionality , and its low power consumption. The DiskOnChip is
available in capacities from 2MB to 72MB and fits in a standard 32-pin
DIP socket.

Another feature of the SBC-492 is the inclusion of a high speed, local
bus IDE controller. This controller supports (through AT A PIO) mode
3 and mode 4 hard disks, enabling data transfer rates in excess of 11
MB/second. Up to four IDE devices can be connected, including large
hard disks, CD-ROM drives, tape backup drives, or other IDE devices.
The built-in, enhanced IDE controller provides a 4-layer, 32-bit, posted
write buffer and a 4-layer, 32-bit read-prefetch buf fer to boost IDE
performance.

Onboard features include two high speed RS-232 serial ports with
16C550 UART s, one bidirectional SPP/EPP/ECP parallel port and a
floppy drive controller. In addition to the 486's 16 KB of onchip cache
memory, the SBC-492 includes an extra 128 KB of L2 onboard cache
memory.

If program execution is halted by a program bug or EMI, the board's
watchdog timer can automatically reset the CPU or generate an
interrupt. This ensures reliability in unmanned or standalone systems.

2 SBC-492 User's Manual

The SBC-492 supports 5 V EDO DRAM. It also provides four 72-pin
SIMM (Single In-line Memory Module) sockets for its onboard system
DRAM. These sockets give you the flexibility to configure your
system from 4 MB to 128 MB of DRAM using the most economical
combination of SIMMs.

Features

• Onboard AMD DX5-133 SQFP type CPU

• Fully PC/A T-compatible PCI/ISA-bus CPU card

• On-board 32-bit PCI-bus SVGA controller

• Built-in fast PCI enhanced IDE controller; supports four IDE devices (large

hard disks, CD-ROM, tape backup, etc.)

• Up to 128 MB of on-board DRAM

• Supports 5 V EDO DRAM

• T wo high-speed serial RS-232 ports (16C550 UAR T s with 16-byte FIFO);

IRQ3, 4, 10, 11 can be individually selected

• One enhanced bidirectional parallel port; supports SPP/EPP/ECP

• W atchdog timer (2 sec ~ 128 min, 1 sec/step)

• On-board keyboard and PS/2 mouse connector

• Connectors for PC/104 module expansion

• "Green" function; supports power management

• On-board feature connector

• Supports Flash BIOS, and BIOS can be upgraded easily

Chapter 1 General Information 3

Specifications

• CPU: AMD DX5-133 (SQFP Type)

• BIOS: AMI Flash BIOS

• Chipset: ALiM1487/M1489

• Bus Interface: PCI/ISA bus, PICMG 2.0 standard

• Level 2 Cache: 128 KB L2 cache memory

• System memory: 4MB to 128MB. Four 72-pin SIMM sockets onboard.

Supports EDO and FP DRAM

• Shadow RAM memory: Supports system and video BIOS shadow memory.

• DMA channels: 7

• Interrupt levels: 15

• Enhanced IDE: Supports up to four enhanced IDE devices (AT A-2).

• FDD interface: Supports up to two floppy disk drives

• Parallel port: One bi-directional parallel port. Supports SPP, ECP, and EPP .

• Serial Ports: Two RS-232 ports, using 16C550 UAR T s with 16-byte FIFO

buffer . Supports speeds up to 115KB/sec. Ports can be individually
configured from COM1 to COM4 or disabled.

• Keyboard / mouse connector: One 6-pin mini-DIN connector is located on

the mounting bracket for easy access. An onboard keyboard 5-pin header
connector is also available.

• Watchdog timer: Can generate a system reset, IRQ15 or NMI. Software

selectable timeout interval (2 sec~128min, 1 sec/step).

• Power management: I/O peripheral devices support power saving and

soze/standby/suspend modes. APM1.1 compliant.

• VGA Controller: Trident TGUI9440

• Display memory: 1MB onboard, upgradable to 2MB.

• Display type: Supports CRT displays

• Resolution: Supports up to 1024 x 768 @ 64K colors.

• Feature connector: 26-pin header

4 SBC-492 User's Manual

• PC/104 connector: 104-pin connector for a 16-bit bus

• Power supply voltage: +5 V (4.75 V to 5.25 V)

• Max. power requirement: +5V @ 3A

• Operating temperature: 32 to 140° F (0 to 60° C)

• Board size: 13.3" (L) x 4.8" (W) (338 mm x 122 mm)

• Board weight: 0.4 kg

Chapter 1 General Information 5

Board layout

DS14185

TC5142560BJ-70 TC5142560BJ-70

Trident

TGUI9440-1

DS14185

SMC

FDC37C665GT

TC5142560BJ-70 TC5142560BJ-70

ADVANCED

24.00

DiskOnChip

M1487 B1

BIOS

Ti

ALI

6 SBC-492 User's Manual

UM61256AS-12

UM61256AS-12

UM61256AS-12

UM61256AS-12

UM61256AS-12

14.318

ALI

M1489

SBC-492 486 DX5-133 CPU CARD REV.A1

Card dimensions

13.327"

4.803"

0.608"

0.315"

3.174"

0.228"

1.874"

0.478"

2.470"

0.076"

0.570"

1.861"

1.673"

Chapter 1 General Information 7

8 SBC-492 User's Manual

2

CHAPTER

Installation

This chapter describes how to set up the
SBC-492 hardware, including instructions
on setting jumpers and connecting
peripherals, switches and indicators. Be
sure to read all safety precautions before
you begin the installation procedure.

Chapter 2 Installation 9

Jumpers and connectors

Connectors on the board link it to external devices such as hard
disk drives, keyboard or floppy drives. In addition, the board has a
number of jumpers that allow you to configure your system to suit
your applications.

The table below lists the function of each of the board jumpers and
connectors.

Jumpers and connectors

Label Function

JP1,7 CPU voltage select (Reserved for future

use)
JP2 Secondary IDE LED
JP3 Primary IDE LED
JP4, 5, 6 On-board VGA enabled/disabled
JP11 Flash BIOS protect
JP15 Clear CMOS
JP17 Reserve for IR CON
JP18 RS-232 port IRQ select
Primary IDE 1st enhanced IDE connector
JP100 DOC address
Secondary IDE 2nd enhanced IDE connector
Floppy Disk FDD connector
Printer Parallel port connector
Feature Connector VGA feature connector
Power CON Power connector
KB CON External keyboard connector
V G A VGA connector
KB/PS2 Mouse Keyboard and/or PS/2 mouse connector
COM-A Serial port 1 connector
COM-B Serial port 2 connector

10 SBC-492 User's Manual

Locating jumpers and connectors

JP17, JP18

PRINTER

COM-B

FEATURE
CONNECTOR

FLOPPY DISK

CPU FAN

PRIMARY IDE

JP4, JP5, JP6

SECONDARY IDE

POWER
CON

TC5142560BJ-70 TC5142560BJ-70

Trident

TGUI9440-1

COM-A

SMC

FDC37C665GT

TC5142560BJ-70 TC5142560BJ-70

Am DX5-133

JP100

VGA

MEGA-KB

ST M48786PC2

ALI

M1487 B1

KB/PS2
MOUSE

KB CON

PC/104 MODULE
CONNECTORS

JP1 1

JP15

EXT-SPK

KEY­LOCK

IDE LED
(JP2, JP3)

CPU VCC
(JP1, JP7)

TB LED
TB SW

SMI OUT
SMI SW
RESET

SIMM
SOCKETS

M1489

ALI

¬¬

¬

¬¬

SBC-492 486DX5-133 CPU CARD Rev. A1

Chapter 2 Installation 11

Setting jumpers

You configure your card to match the needs of your applications
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. T o “open” a
jumper you remove the clip. Sometimes a jumper will have three
pins, labeled 1, 2 and 3. In this case you may connect either pins 1
and 2 or 2 and 3.

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.

3

2

If you have any doubts about the best hardware configuration for
your applications, contact your local distributor or sales represen­tative before you make any changes.

12 SBC-492 User's Manual

Safety precautions

Warning! Always completely disconnect the power cord

from your chassis whenever you are working on
it. Do not make connections while the power is
on, sensitive electronic components can be
damaged by the sudden rush of power. Only
experienced electronics personnel should open
the PC chassis.

Caution! Always ground yourself to remove any static

charge before touching the CPU card. 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.

Chapter 2 Installation 13

Installing DRAM (SIMMs)

The SBC-492 CPU card provides four 72-pin SIMM (Single In-line
Memory Module) sockets and supports between 4 MB to 128 MB
of FP RAM or EDO RAM.

Installing SIMMs

Note that the modules can only fit into a socket one way.

1 . Insert the memory module into the socket at a moderate angle.

2. Push the module toward the vertical posts at both ends of the

socket until the module is upright, and the retaining clips at
both ends of the module click into place. When positioned
correctly, the pins on top of the vertical posts should corre­spond to the circular holes on the ends of the module.

3. Repeat steps 1 and 2 for each module you install.

Removing SIMMs

If you need to remove a SIMM, follow the procedures below:

1. Supporting the SIMM with a finger, use a pen or a similarly

shaped object and press one retaining clip straight down.

2. Repeat for the other side. When released, the retaining clips

will push the SIMM up and out of its upright position.

3. Carefully pull the SIMM out of the socket with your fingers.

4. Repeat the above steps for each module you remove.

14 SBC-492 User's Manual

SIMM Module Installation Table

Modules

Type

Single

Bank
SIMM

Module

Double

Bank
SIMM

Module

Mixed

Single

Bank

and

Double

Bank
SIMM

Modules

Total

Modules

1 S
1 S
1 S
1 S
2 S S
2 S S
2 S S
2 S S
2 S S
2 S S
3 S S S
3 S S S
3 S S S
3 S S S
4 S S S S
1 D
1 D
1 D
1 D
2 D D
2 D D
2 D S
2 D S
2 S D
2 D S
3 D S S
3 S D S

SIMM 1 SIMM 2 SIMM 3 SIMM 4

S : Single Banks SIMM Module
D : Double Banks SIMM Module

Chapter 2 Installation 15

IDE hard drive connections

Y ou can attach four Enhanced Integrated Device Electronics (IDE)
hard disk drives to the SBC-492's internal controller. The card
comes with a 40-pin flat-cable piggyback cable. This cable has
three identical 40-pin flat-cable connectors.

Connecting the hard drive

Wire number 1 on the cable is red or blue, and the other wires are
gray.

1. Connect one end of the cable to PRIMARY IDE or SECOND-

AR Y IDE conector on the CPU card. 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
drive. (See your hard drive's documentation for the location of
the connector.)

Unlike floppy drives, you can make the connections with any of
the connectors on the cable. If you install two drives, you need to
set one as the master and another as the slave. You do this using
jumpers on the drives. If you install just one drive, set it as the
master. (See your hard drive's documentation for the setting of
master/slave mode.

16 SBC-492 User's Manual

Pin assignments

The following table lists the pin numbers and their respective
signals:

IDE Connector

Pin Signal Pin Signal

1 Reset 2 GND
3D7 4D8
5D6 6D9
7 D5 8 D10
9D4 10D11
11 D3 12 D12
13 D2 14 D13
15 D1 16 D14
17 D0 18 D15
19 GND 20 N.C.
21 N.C, 22 GND
23 IOW 24 GND
25 IOR 26 GND
27 IORDY 28 BALE
29 N.C. 30 GND
31 IRQ 32 -I/O CS16
33 A1 34 N.C.
35 A0 36 A2
37 CS0 38 CS1
39 -ACT 40 GND

IDE LED (JP2, JP3)

You can connect an LED to indicate that an IDE device is in use.
The pin assignments for both jumpers are as follows:

IDE LED pin assignments (JP2, JP3)

Pin Function

1 -R/W IDE
2 Pull high

Chapter 2 Installation 17

Floppy drive connections

You can attach up to two floppy disks to the SBC-492's on-board
controller. You can use any combination of 5.25" (360 KB and 1.2
MB) and/or 3.5" (720 KB, 1.44 MB, and 2.88 MB) drives.

The SBC-492 CPU card comes with a 34-pin daisy-chain drive
connector cable. On one end of the cable is a 34-pin flat-cable
connector. There are two sets of floppy disk drive connectors, one
in the middle, and one on the other end. Each set consists of a 34­pin flat-cable connector (usually used for 3.5" drives) and a
printed-circuit board connector (usually used for 5.25" drives).

Connecting the floppy drive

1 . Plug the 34-pin flat-cable connector into FLOPPY DISK

connector on the CPU card.

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: floppy . The set in the middle connects to the B: floppy.

Pin assignments

The following table lists the pin assignments for FLOPPY DISK
connector:

FLOPPY DISK Connector

Pin Signal Pin Signal

1~33 (odd)GND 2 High density
4, 6 Unused 8 Index
10 Motor enable A 12 Driver select B
14 Driver select A 16 Motor enable B
18 Direction 20 Step pulse
22 Write data 24 Write enable
26 Track 0 28 Write protect
30 Read data 32 Select head
34 Disk change

18 SBC-492 User's Manual

Parallel port

Normally, the parallel port is used to connect the card to a printer.
The SBC-492 includes an on-board parallel port, accessed through
a 26-pin flat-cable connector, PRINTER connector . The CPU card
comes with an adapter cable, which lets you use a traditional DB­25 connector. The cable has a 26-pin connector on one end and a
DB-25 connector on the other, mounted on a retaining bracket.

Installing the retaining bracket

The retaining bracket installs at an empty slot in your system's
chassis. It provides an external port that allows your parallel
peripheral to access to the card's parallel port connector.

1. Find an empty slot in your chassis.

2. Unscrew the plate that covers the end of the slot.

3. Screw in the bracket in place of the plate.

4. Next, attach the flat-cable connector to the PRINTER connec­tor on the CPU card. Wire 1 of the cable is red or blue, and the
other wires are gray. Make sure that Wire 1 connects to Pin 1
of the PRINTER connector. Pin 1 is on the right side of
PRINTER connector.

Pin assignments

PRINTER Connector

Pin Signal Pin Signal

1 Strobe 2 Data 0
3 Data 1 4 Data 2
5 Data 3 6 Data 4
7 Data 5 8 Data 6
9 Data 7 10 -Acknowledge
11 Busy 12 Paper empty
13 + Select 14 - Auto feed
15 - Error 16 - Init printer
17 - Select input 18~25 GND

Chapter 2 Installation 19

Power supply connections

Power supply connector

In single-board-computer (non-passive-backplane) applications
you will need to connect power directly to the SBC-492 board using
the connector labeled POWER CON. This connector is fully
compatible with the standard PC power supply connector. See the
following table for its pin assignments:

Power supply connector

Pin Function

1 N.C.
2 +5 V
3 +12 V
4 -12 V
5 GND
6 GND

CPU fan power connector

For some harsh environments or demanding applications, you need
to install a CPU cooling fan on the CPU to keep it from overheating.
The SBC-492 provides a cooling fan connector labeled CPU F AN.
The following table lists the pin assignments.

DC

DC

DC

CPU fan power connector

Pin Function

1 +12 V
2 GND
3 GND
4 +5 V

20 SBC-492 User's Manual

Display connections

The SBC-492 CPU card's SVGA connector (labeled VGA) with PCI
bus supports monochrome display as well as high resolution color
displays. In addition, the card also features a Feature connector,
which allows you to plug in other external display devices. The
following table lists their pin assignments.

Feature connector VGA connector

Pin Function Pin Function

1 C0 1 Red video
2 C1 (Blue) 2 Green video
3 C2 (Green) 3 Blue video
4 C3 (Red) 4 Not used
5 C4 (2nd Green) 5 GND
6 C5 (2nd Blue) 6 Red return (GND)
7 C6 (2nd Red) 7 Green return GND)
8 C7 8 Blue return (GND)
9 DAC clock 9 Key (no pin)
10 Blank 10 Sync return (GND)
11 Horizontal sync 11 Monitor ID(not used)
12 Vertical sync 12 Monitor ID
13 Ground 13 Horizontal sync
14 Ground 14 Vertical sync
15 Ground 15 Not used
16 Ground
17 SIV (Select Internal Video)
18 SIS (Select Internal Sync)
19 SICLK (Select Internal Clock)
20 N.C.
21 Ground
22 Ground
23 Ground
24 Ground
25 N.C.
26 N.C.

Chapter 2 Installation 21

On-Board VGA Settings (JP4, JP5,

JP6)

Y ou can disable the on-board VGA by setting JP4, JP5 and JP6.

JP4, JP5, JP6: On-board VGA Settings

DISABLE VGA ENABLED VGA

JP4
JP5

JP6

CPU Vcc select (JP1, JP7)

JP1 and JP7 must be set to match the CPU type. The chart below
shows the proper jumper settings for their respective Vcc.

CPU Vcc select (JP1, JP7)

5.0 V 3.3 V 3.45 V 3.6 V 4.0 V

1

JP
JP7

22 SBC-492 User's Manual

Keyboard and PS/2 mouse connec-

tors

The SBC-492 board provides two keyboard connectors. A 5-pin
connector (KB CON) supports passive backplane applications. A
second 6-pin mini-DIN connector (KB/PS2 MOUSE) on the card
mounting bracket supports single-board-computer applications.
The card comes with an adapter to convert the 6-pin mini-DIN
connector, used for the mouse, and the standard DIN connector for
the keyboard.

Keyboard connector

Pin Function

1 K.B. clock
2 K.B. data
3 N.C.
4 GND
5 +5 V

Keyboard and/or PS/2 mouse connector (6-pin mini-DIN)

Pin Function

1 K.B. data
2 PS/2 mouse data
3 GND
4 +5 V
5 K.B. clock
6 PS/2 mouse clock

DC

DC

Chapter 2 Installation 23

Serial ports

The SBC-492 offers two RS-232 serial ports. Y ou can select the
address for each port or disable it, using the BIOS Peripheral Setup
program.

The card mounting bracket holds the serial port connector for one
port, and the parallel port and serial port adapter kit (supplied with
the card) holds the connector for the other port. This lets you
connect and disconnect cable after you install the card. The DB-9
connector on the top of the bracket is the first RS-232 port, COM­A. The DB-9 connector on the adapter kit is the second serial port,
COM-B. The following sections tell how to make RS-232 connec­tions.

RS-232 connections (COM-A, COM-B)

The following table shows the pin assignments for the card's RS­232 ports:

RS-232 connector pin assignment

Pin no. Signal

1 DCD
2RX
3TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9RI

24 SBC-492 User's Manual

Serial ports IRQ select (JP18)

You can select the serial ports' IRQs by setting JP18 as follows:

JP18: RS-232 PORT IRQ SELECT:

COMA COMB JP18 setting

IRQ3 IRQ4

*

IRQ4 IRQ3

IRQ11 IRQ10

IRQ10 IRQ11

IRQ4 IRQ10

IRQ4 IRQ11

IRQ3 IRQ10

IRQ3 IRQ11

IRQ11 IRQ3

IRQ11 IRQ4

* default

Chapter 2 Installation 25

IRQ10 IRQ3

IRQ10 IRQ4

Flash BIOS Protect (JP11)

Y ou can set the JP1 1 to protect BIOS write-enable. The configura­tion is as follows:

JP11: FLASH BIOS PROTECT

Write Protect Write Enabled

Clear CMOS (JP15)

Y ou can clear the CMOS data by setting JP15. T o clear CMOS,
make sure power is off, make JP15 from open to short by a jumper
cap or external switch for a few seconds, then move the jumper cap
or external switch away from the JP15, Back to the default (open).

JP15: CLEAR CMOS

PROTECT* CLEAR CMOS

* default

26 SBC-492 User's Manual

External Switches and LEDs

Power LED and keylock

Y ou can connect an LED to indicate when the CPU card is on. Pin 1
of connector labeled KEYLOCK supplies power to the LED and Pin
3 is the ground.

You can use a switch (or a lock) to disable the keyboard. In this
state the PC will not respond to any input. This is useful if you
don’t want anyone to change or stop a running program. Simply
connect the switch between Pins 4 and 5. The pin assignments
appear in the following table:

Power LED and keylock

Pin Function

1 LED Power (+5 V)
2 No Connector
3 Ground
4 Keyboard lock
5 Ground

External speaker

The CPU card has its own buzzer. You can disable the internal
buzzer and connect an external speaker to the EXT-SPK connec­tor. Enabling the external speaker automatically disables the internal
buzzer.

External speaker

Pin Function

1 Vcc
2 Speaker output
3 Buzzer in
4 Speaker output

Chapter 2 Installation 27

Reset switch

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. The following table shows the pin
assignments for the RESET connector.

Reset switch

Pin Function

1 Ground
2 Reset

Turbo LED

Y ou can connect an LED indicator across the jumper labeled TB
LED to indicate when the CPU is in Turbo mode. Marks on the
circuit board indicate LED polarity (the pin on the left is positive).
When the CPU powers down upon switching to green mode, the
Turbo LED begins to blink.

Turbo LED

Pin Function

1 Turbo
2 Ground

Turbo switch

You can connect a switch across the pins of jumper labeled TB SW
to change the CPU speed between Turbo and non-Turbo mode.
When you leave the pins open, the CPU card operates at full
speed. When you close the pins, the card operates at slow speed
for compatibility with older software.

Turbo switch pin assignments

Pin Function Low Speed High Speed

1 - Deturbo
2 Pull low

28 SBC-492 User's Manual

DOC address setting (JP100)

The DiskOnChip 2000 occupies a 8 KB window in the upper
memory address range of C800 to E000. Y ou should ensure this
does not conflict with any other device's memory address. JP3
controls the memory address of the Flash disk.

DOC address setting (JP100)

Address Disable C800

2 4 6

2 4 6

* default

1 3 5

1 3 5

CC00 D000* D400

2 4 6

1 3 5

2 4 6

1 3 5

2 4 6

1 3 5

D800 DC00 E000

2 4 6

1 3 5

2 4 6

1 3 5

2 4 6

1 3 5

Chapter 2 Installation 29

DiskOnChip socket (U330)

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 saves integration overhead.

The DiskOnChip 2000 family of products is available in capacities
ranging from 2MB up to 72 MB, 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 standard 32-pin EPROM
devices.

Figure1-MD2200 Pin-out

pin
Name

A0-A12 Address bus 4-12,23,25-27 Inputs

A13-A16 Address bus 2,3,28,29 Inputs 1

D0-D7 Data bus 13-15,17-21 I/O

CE/ C hip Enable 22 Input

OE /

OE/ Output Enable 24 Input

WE/ Write Enabl e 31 Input

NC Not connected 1.30 2

VCC Power 32

GND Ground 16

Description Pin Number Direction Note

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

30 SBC-492 User's Manual

CHAPTER

3

AMI WinBIOS Setup

This chapter describes the card’s diagnos­tic tests and how to set BIOS configura­tion data in a Windows environment.

Chapter 3 AMI WinBIOS setup 31

General information

WinBIOS Setup configures system information that is stored in
CMOS RAM. Unlike conventional BIOS setup programs, Win­BIOS features a graphical user interface that is easy to use.

Starting WinBIOS setup

As POST executes, the following appears;

Hit <DEL> if you want to run SETUP

Press <DEL> to run WinBIOS setup.

WinBIOS main menu

The WinBIOS setup screen appears as follows:

32 SBC-492 User's Manual

Using a mouse with WinBIOS setup

WinBIOS Setup can be accessed via keyboard, mouse, or pen. The
mouse click functions are:

• single click to change or select both global and current fields

• double click to perform an operation in the selected field

Using the keyboard with WinBIOS setup

WinBIOS Setup has a built-in keyboard driver that uses simple
keystroke combinations:

Keystroke Function

<tab> Move to the next window or field.

è, ç, é,

<ENTER> Select in the current field.
+ Increments a value.

- Decrements a value.
<ESC> Close the current operation and return to

<PgUp> Return to the previous page.
<PgDn> Advance to the next page.
<Home> Return to the beginning of the text.
<End> Advance to the end of the text.
<ALT>+H Access a help window.
<ALT>+<Spacebar>Exit WinBIOS Setup.
Alphabetic keys A to Z are used in the Virtual keyboard, and

Numeric keys 0 to 9 are in the Virtual keyboard and

Move to the next field to the right, left, above,

ê

or below.

previous level.

are not case sensitive.

Numeric keypad.

Chapter 3 AMI WinBIOS setup 33

Setup

Standard Setup

The WinBIOS Setup options described in this section are selected
by choosing the Standard icon from the WinBIOS Setup main
menu selection screen, as shown below.

The Standard Setup screen appears:

Pri Master, Pri Slave, Sec Master and Sec Slave

Choose these icons to configure the hard disk drive named in the
option. When you click on an icon, the following parameters are
listed: Type, LBA/Large Mode, Block Mode, 32Bit Mode, and
PIO Mode. All parameters relate to IDE drives except Type.

Date, Day and Time Configuration

Select the Date and Time icon in the Standard Setup. The current
values for each category are displayed. Enter new values through
the keyboard.

34 SBC-492 User's Manual

Floppy A, Floppy B

Select these icons to configure the type of floppy drive that is
attached to the system: 360 KB 5¼", 1.2 MB 5¼", 720 KB 3½",

1.44 MB 3½", and/or 2.88 MB 3½". The settings have not been
pre-installed.

User-Defined Drive

If you are configuring a SCSI drive or an MFM, RLL, ARLL, or
ESDI drive with drive parameters that do not match drive types 1­46, you can select the User in the Type field. You must then enter
the drive parameters on the screen that appears. The drive parame­ters include:

• Cylinder (number of cylinders),

• Hd (number of heads),

• WP(starting write precompensation cylinder),

• Sec (number of sectors),

• Size (drive capacity).

Chapter 3 AMI WinBIOS setup 35

Advanced Setup

Select the Advanced icon from the WinBIOS Setup main menu to
enter Advanced Setup.

The Advanced Setup options described in this section are the
standard options as shown on the following screen.

36 SBC-492 User's Manual

Quick Boot:

Set this option to Enabled to instruct AMIBIOS to boot quickly
when the computer is powered on. This option replaces the old
Above 1 MB Memory T est Advanced Setup option.

Setting Description

Disabled

Enabled

Boot Up Sequence:

AMIBIOS test all system memory. AMIBIOS waits up
to 40 seconds for a READY signal from the IDE hard
disk drive. AMIBIOS waits for .5 seconds after
sending a RESET signal to the IDE drive to allow the
IDE drive time to get ready again. AMIBIOS checks
for a <Del> key press and runs WINBIOS Setup if
the key has been pressed.

AMIBIOS does not test system memory above 1 MB.
AMIBIOS does not wait up to 40 seconds for a

READY signal from the IDE hard disk drive. If a
READY signal is not received immediately from the
IDE drive, AMIBIOS does not configure that drive.
AMIBIOS does not wait for .5 seconds after sending
a RESET signal to the IDE drive to allow the IDE drive
time to get ready again.

You cannot run WINBIOS Setup at system boot,
because there is no delay for the

Setup

message.

Hit <Del> to run

This option sets the sequence of boot drives (floppy drive A:, hard
disk drive C:, or CD-ROM drive) that the AMIBIOS attempts to
boot from after AMIBIOS POST completes. The setting is
C:,A:,CDROM; CDROM,A:,C:; or A:,C:,CDROM. The default
setting is A:,C:,CDROM.

Boot Up Num Lock:

Set this option to Off to turn the Num Lock key off when the
computer is booted so you can use the arrow keys on both the
numeric keypad and the keyboard. The setting is On or Off. The
default setting is on.

Chapter 3 AMI WinBIOS setup 37

Turbo Switch:

Set this option to Enabled to permit AMIBIOS to control the
hardware turbo (speed) switch. The setting is Enabled or Dis-

abled.

Floppy Drive Swap:

Set this option to Enabled to permit drives A: or B: to be swapped.
The setting is Enabled or Disabled. The default setting is Dis-

abled.

Floppy Drive Seek:

Set this option to Enabled to specify that floppy drive A: will
perform a Seek operation at system boot. The setting is Enabled
or Disabled. The Optimal and Fail-Safe default setting is Disabled.

Mouse Support:

When this option is set to Enabled, AMIBIOS supports a PS/2­type mouse. The setting is Enabled or Disabled. The default
setting is Enabled.

System Keyboard:

This option specifies that a keyboard is attached to the computer.
The setting is Present or Absent. The Optimal and Fail-Safe default
setting is Present.

Primary Display:

This option specifies the type of display monitor and adapter
in the computer. The setting is Mono, CGA40, CGA80,
EGA/VGA, or Absent. The Optimal and Fail-Safe default setting is
EGA/VGA.

38 SBC-492 User's Manual

Password Check:

This option enables password checking every time the computer
is powered on or every time WINBIOS Setup is executed. If
Always is chosen, a user password prompt appears every time the
computer is turned on. If Setup is chosen, the password prompt
appears if WINBIOS is executed. The Optimal and Power-On
default is Setup.

Parity Check:

Set this option to Enabled to check the parity of all system
memory . The setting is Enabled or Disabled. The Optimal and Fail­Safe default setting is Disabled.

OS/2 Compatible Mode:

Set this option to Enabled to permit AMIBIOS to run with IBM
OS/2. The setting is Enabled or Disabled. The default setting is

Disabled.

Wait for F1 if Error:

AMIBIOS POST error messages are followed by:

Press <F1> to continue

If this option is set to Disabled, AMIBIOS does not wait for you
to press the <F1> key after an error message. The setting is

Enabled or Disabled. The Optimal and Fail-Safe default setting is
Enabled.

Hit Del Message Display:

Set this option to Disabled to prevent :

Hit <DEL> if you want to run Setup

from appearing on the first AMIBIOS screen when the computer
boots. The setting is Enabled or Disabled. The Optimal and Fail-
Safe default setting is Enabled.

Chapter 3 AMI WinBIOS setup 39

Internal Cache:

This option specifies the caching algorithm used for L1 internal
cache memory . The settings are:

Setting Description

Disabled

enabled.

WriteBack
WriteThru

External Cache

Neither L1 internal cache memory on the
CPU nor L2 secondary cache memory is

Use the write-back caching algorithm.
Use the write-through caching algorithm.

This option specifies the caching algorithm used for L2 second­ary (external) cache memory. The settings are:

Setting Description

Disabled

enabled.

WriteBack
WriteThru

System BIOS Cacheable

Neither L1 internal cache memory on the

CPU nor L2 secondary cache memory is

Use the write-back caching algorithm.
Use the write-through caching algorithm.

When this option is set to Enabled, the contents of the F0000h
system memory segment can be read from or written to L2
secondary cache memory. The contents of the F0000h memory
segment are always copied from the BIOS ROM to system RAM
for faster execution.

The settings are Enabled or Disabled. The Fail-Safe default
setting is Disabled.

Numeric Processor Test

Set this option to Ebable to permit numeric processor to be
tested. The deault setting is Disabled.

Hard Disk Delay

This option allows you to select hard disk delay time from 5 Sec
to 15 Sec. The default setting is Disabled.

40 SBC-492 User's Manual

C000,16 KB Shadow D000,16KB Shadow

C400,16 KB Shadow D400,16KB Shadow

C800,16 KB Shadow D800,16KB Shadow

CC00,16 KB Shadow DC00,16KB Shadow

E000,64KB Shadow

These options control the location of the contents of the 16KB
of ROM beginning at the specified memory location. If no
adapter ROM is using the named ROM area, this area is made
available to the local usb. The settings are:

Setting Description

Shadow

(RAM) for faster execution.

Enabled

written to the same address in system memory
(RAM) for faster execution, if an adapter ROM
will be using the named ROM area. Also, the
contents of the RAM area can be read from and
written to cache memory.

Disabled

or written to cache memory.

The contents of C0000h - C3FFFh are written

to the same address in system memory

The contents of the named ROM area are

The video ROM is not copied to RAM. The

contents of the video ROM cannot be read from

Chapter 3 AMI WinBIOS setup 41

Chipset Setup

The WinBIOS Setup options deccribed in this section are selected
by choosing the Chipset icon from the WinBIOS setup main menu,
shown below .

The following is an option list offered by Chipset Setup

Chipset setup options

Function Options

Auto Configuration Function Disabled/Enabled
AT Bus Clock 7.16

CLK/3
CLK/4
CLK/5
CLK/6
CLK/8

DRAM Read Timing Slow

Normal
Faster
Fastest

42 SBC-492 User's Manual

Function Options

DRAM Write Timing Slow

Normal
Faster
Fastest

SRAM Type 2-1-1-1

3-1-1-1
3-2-2-2
4-2-2-2

SRAM Read Timing Fast

Normal

SRAM Write Timing FAST

Normal

Memory Parity Check Disabled

Enabled

DRAM Hidden Refresh Disabled

Enabled

DRAM Refresh Period Setting 15 ms

30 ms
60 ms
120 ms

Memory Hole at 15-16M Disabled

Enabled

ISA I/O Recovery Disabled

Enabled

ISA I/O Recovery Time 0.5 m s

1.0 ms

1.5 ms

2.0 ms

2.5 ms

3.0 ms

3.5 ms

Cx5x86 Linear Wrapped Mode Disabled

Enabled

Chapter 3 AMI WinBIOS setup 43

Power Management Setup

As part of the "Green" function, the Power Management Setup
offers options to help reduce power consumption. To see the
options in this group, choose the Power Management Setup icon
from the WinBIOS Setup main menu.

Power Management Mode/APM Funtion

Set this option to Enabled to enable the power management and
APM (Advanced Power Management) features.

The settings are Enabled or Disabled. The default setting is

disabled.

44 SBC-492 User's Manual

PCI/PnP Setup

PCI/PnP Setup options are displayed by choosing the PCI/PnP
Setup icon from the WINBIOS Setup main menu. All PCI/PnP
Setup options are described in this section.

Plug and Play Aware OS

Set this option to Yes if the operating system installed in the
computer is Plug and Play-aware. AMIBIOS only detects and
enables PnP ISA adapter cards that are required for system boot.
The Windows 95 operating system detects and enables all other
PnP-aware adapter cards. Windows 95 is PnP-aware. Set this
option to No if the operating system (such as DOS, OS/2,
Windows 3.x) does not use PnP.

You must set this option correctly or PnP-aware adapter cards
installed in your computer will not be configured properly.

The settings are No or Yes. The Optimal and Fail-Safe default
setting is Yes.

Chapter 3 AMI WinBIOS setup 45

PCI Latency Timer (in PCI Clocks)

This option sets latency of all PCI devices on the PCI bus. The
settings are in units equal to PCI clocks. The settings are 32, 64,
96, 128, 160, 192, 224, or 248. The Optimal and Fail-Safe default
settings are 64.

VGA Locate Bus

This option allows you to select VGA bus. The default setting is
PCI and ISA.

CPU to PCI Write Buffer

This option sets the write buffer between CPU and PCI bus. The
default setting is Enabled.

PCI IDE BusMaster

Set this option to Enabled to specify that the IDE controller on
the PCI local bus has bus mastering capability. The settings are

Disabled or Enabled. The Optimal and Fail-safe default setting is
Disabled.

Offboard PCI IDE Card

This option specifies if an offboard PCI IDE controller adapter
card is used in the computer. You must also specify the PCI
expansion slot on the motherboard where the offboard PCI IDE
controller card is installed. If an offboard PCI IDE controller is
used, the onboard IDE controller on the motherboard is automati­cally disabled. The settings are Disabled, Auto, Slot1, Slot2,
Slot3, or Slot4.

If Auto is selected, AMIBIOS automatically determines the
correct setting for this option. The Optionmal and Fail-Safe
default setting is Auto.

46 SBC-492 User's Manual

PCI Slot1 IRQ Priority

PCI Slot2 IRQ Priority

PCI Slot3 IRQ Priority

PCI Slot4 IRQ Priority

This option sets PCI slot IRQ priority.
The settings are Auto,3,4,5,7,9,10,11. The default setting is Auto.

IRQ3
IRQ4
IRQ5
IRQ7
IRQ9
IRQ10
IRQ11
IRQ12
IRQ14
IRQ15

These options specify the bus that the named interrupt request
lines (IRQs) are used on. These options allow you to specify
IRQs for use by legacy ISA adapter cards.

These options determine if AMIBIOS should remove an IRQ from
the pool of available IRQs passed to BIOS configurable devices.
The available IRQ pool is determined by reading the ESCD
NVRAM. If more IRQs must be removed from the pool, the end
user can use these PCI/PnP Setup options to remove the IRQ by
assigning the option to the ISA/EISA setting. Onboard I/O is
configurable by AMIBIOS. The IRQs used by onboard I/O are
configured as PCI/PnP.

The settings are PCI/PnP or ISA/EISA. The Optimal and Fail-Safe
default setting is PCI/PnP.

Chapter 3 AMI WinBIOS setup 47

Reserved Memory Size

This option specifies the size of the memory area reserved for
legacy ISA adapter cards.

The settings are Disabled, 16K, 32K, or 64K and Fail-Safe default
setting is Disabled.

Reserved Memory Address

This option specifies the beginning address (in hex) of the
reserved memory area. The specified ROM memory area is
reserved for use by legacy ISA adapter cards.

The settings are C0000, C4000, C8000, CC000, D0000, D4000,
D8000, or DC000.

48 SBC-492 User's Manual

Peripheral Setup

Peripheral Setup options are displayed by choosing the Peripheral
Setup icon from the WINBIOS Setup main menu. All Peripheral
Setup options are described in this section:

Onboard FDC

This option enables the floppy drive controller on the mother­board. The settings are Auto, Enabled or Disabled.

Onboard Serial Port 1

This option enables serial port 1 on the motherboard and
specifies the base I/O port address for serial port 1.

The settings are Auto, Disabled, 3F8h, 3E8h, 2E8h,2F8h. The
Fail-Safe default setting is Auto.

Chapter 3 AMI WinBIOS setup 49

Onboard Serial Port2

This option enables serial port 2 on the motherboard and speci­fies the base I/O port address for serial port 2. The settings are
Auto. Disabled, 3F8h, 2F8h, 3E8h, 2E8h. The Fail-Safe default
setting is Auto.

Onboard Parallel Port

This option enables the parallel port on the motherboard and
specifies the parallel port base I/O port address. The settings are

Auto, disabled, 278, 378, 3BC. The Fail-Safe default setting is
Auto.

Parallel Port Mode

This option specifies the parallel port mode. ECP and Epp are
both bidirectional data transfer sechemes that adhere to the IEEE
P1284 specification. The settings are:

Setting Description

Normal

EPP

ECP

The normal parallel port mode is used. This is the

default setting.
The parallel port can be used with devices that

adhere to the Enhanced Parallel Port (EPP) specifi­cation. EPP uses the exiting parallel port signals to
provide asymmetric bidirectional data trans driven
by the host device.

The parallel port can be used with devices that

adhere to the Extended Capabilities Port (ECP)
specification. ECP uses the DMA protocol to
achieve transfer rates of approx imately 2.5 Mbs.
ECP provides symmetric bidirectional communla­tions.

50 SBC-492 User's Manual

Parallel Port DMA Channel

This option is only available if the setting for the Parallel Port
Mode optionis ECP.

The settings are Disabled, DMA, CH (channel) 0, DMA CH 1, or
DMA CH3.

Parallel Port IRQ

IRQ7 us used for the Parallel Port(LPT 1). The IRQ can be
changed to IRQ5.

Onboard IDE

This option specifies the onboard IDE controller channels that
will be used. The settings are Primary, Both, or Disabled.

Chapter 3 AMI WinBIOS setup 51

Utility

The following icons appear in this section:

Detect IDE:

If drive C: is an IDE drive, the hard disk drive parameters for drive
C: are automatically detected and reported to the Hard Disk Drive
C: screen in Standard Setup, so you can easily configure drive C:.
Drive D and CD-ROM could also be automatically detected and
reported to screen if drvie D and CD-ROM are IDE drives.

Language:

If this feature is enabled, you can select WINBIOS Setup message
is in different languages. The default setting is English.

52 SBC-492 User's Manual

Security

The following icons appear in this section:

Two Levels of Passwords

Both the Supervisor and the User icons configure password
support. If you use both, the Supervisor password must be set.

The system can be configured so that all users must enter a
password every time the system boots or when WINBIOS Setup is
executed, using either or both the Supervisor or User Password.

Chapter 3 AMI WinBIOS setup 53

The following screen appears when you select the password icon

You can enter a password by:

• typing the password on the keyboard

• selecting each letter via the mouse

• selecting each letter via the pen stylus (pen access must be
customized for each specific hardware platform.)

Setting a Password

The password check option is enabled in Advanced Setup by
choosing either Always or Setup. Here, you determine the
password to be used. The password is stored in CMOS RAM.

To assign a password,

1. Enter a 1-6 character password. The password does not appear

on the screen when typed.

2. Retype the password when prompted by W inBIOS.

A message box will appear when the password is confirmed.
Keep a record of the password. If you forget the password, you

must drain CMOS RAM and reconfigure the system.

54 SBC-492 User's Manual

Changing a password

1 . Select the Supervisor or User icon from the Security section of

the WinBIOS Setup main menu.

2. Enter the password and press <ENTER>. The screen does not
display the characters entered.

3. After the new password is entered, retype the new password as
prompted and press <ENTER>.

If the password confirmation is incorrect, an error message
appears. If the new password is entered without error, press
<ESC> to return to the WinBIOS setup Main Menu. The password
is stored in CMOS RAM after WinBIOS Setup completes. The
next time the system boots, you are prompted for the password if
the password function is present and is enabled.

Anti-virus

Select the Anti-virus icon from the Security section of the
WinBIOS Setup main menu. W inBIOS issues a warning when any
program (or virus) issues a Disk format command or attempts to
write to the boot sector of the hard disk drive. The settings are
Enabled or Disabled.

If enabled, the following appears when a write is attempted to the
boot sector. You may have to type N several times to prevent the
boot sector write.

Boot Sector Write !!!

Possible VIRUS: Continue (Y/N)? _

The following is displayed after any attempt to format any
cylinder, head, or sector of any hard disk drive via the BIOS INT
13 Hard Disk Drive Service:

Possible VIRUS: Continue (Y/N)? _

Format!!!

Chapter 3 AMI WinBIOS setup 55

Default

The icons in this section permit you to select a group of settings
for all WinBIOS Setup options. Not only can you use these icons
to quickly set system configuration parameters, you can also
choose a group of settings that have a better chance of working
when the system is having configuration-related problems.

Original

Choose the Original icon to return to the system configuration
values present in WinBIOS Setup when you first begin this
WinBIOS Setup session.

Optimal

You can load the optimal default settings for the WinBIOS Setup
options by selecting the Optimal icon. The Optimal default
settings are the best-case values that could optimize system
performance. If CMOS RAM is corrupted, the Optimal settings
are loaded automatically.

Fail-Safe

You can load the Fail-Safe WinBIOS Setup options settings by
selecting the Fail-Safe icon.

The Fail-Safe settings provide the most stable settings, though
they do not provide optimal performance. Use this option as a
diagnostic aid if the system is behaving erratically .

56 SBC-492 User's Manual

Exiting WinBIOS

Y ou can exit W inBIOS by pressing the <ESC> key while in the
WinBIOS main menu screen.

The following screen appears:

Select the option you desire, and the system will continue its boot
up sequence.

Chapter 3 AMI WinBIOS setup 57

58 SBC-492 User's Manual

4

CHAPTER

SVGA Setup

The SBC-492 features an on-board VGA
interface. This chapter provides informa­tion about:

• SVGA installation

• Display utilities and drivers

• Software installation

Chapter 4 SVGA Setup 59

SVGA driver installation

Installing from Windows 3.1

The graphic installation program (TINSTALL) supports a simple 6
step installation procedure for the display driver setup program,
the power management program and the UNinstall program.

To use TINSTALL, follow the 6 steps below:

1. Ensure that MS Windows 3.1 is up and running properly,
using the standard VGA driver.

2. Select the Program Manager.

3. Select RUN from the FILE menu on the menu bar.

5. Insert the Windows 3.1 driver disk and type A:TINSTALL (if
the display driver disk is in the B drive, type in B:TINSTALL
instead), as shown below, and then press <ENTER>.

6. A menu will appear, presenting a choice of Express or
Custom Installation.

60 SBC-492 User's Manual

Express Installation

Express Installation automatically copies the display drivers into
the TRIDENT.AGI directory and the Utility files into the
TRIDENT.UTL directory. Once all files are copied, a program
group called DISPLA Y DRIVER AND UTILITIES will be created.

Custom Installation

Custom Installation allows control over where files are stored and
in what program group the icons are placed. The first dialog box
shows the default directory to which the display drivers will be
copied.

To change the directory name:

1. Delete the default name.

2. Enter the desired directory name.

3. Once the desired directory name is selected, continue the

installation procedure by selecting Continue, or by pressing
<ENTER>.

The next dialog box displays a summary of where files are stored.

4. Select Continue to copy the driver and utility files.
When all files are copied, the program will present a choice of

program groups where the icons will be created. Create a new
group to place the utility icons or select from pre-existing groups
(e.g. Main, Applications, Accessories, etc.).

Tinstall icons

The Tinstall program creates three icons:
a. Screen Control (Used to configure display drivers)

b. DPMS (Used for power management configurations)
c. UNinstall (Used to delete the installed TRIDENT drivers)

NOTE: Different “display driver set” versions cannot be

installed to the same directory name.

“Display driver sets” of the same version number ( e.g. UA6.0 )
will replace the existing one.

Chapter 4 SVGA Setup 61

Screen Control

The Screen Control panel contains controls for setting screen
resolution, color depth, font size, refresh rates. Not all
combinations of screen resolution, color depth, font size and
refresh rate are attainable.

Color depths of 16, 256, 64K, or 16.7M colors can be
selected by clicking next to the desired option. Color depth
determines the number of colors that may be simultaneously
displayed on the screen. The selected color depth determines
the possible resolutions.

Screen resolutions of 640x480, 800x600, 1024x768,
1280x1024, or 1600x1200 can be selected by clicking next
to the available options. The virtual screen size is automatical­ly adjusted to be at least as large as the selected screen
resolution.

Available refresh rates are dependent on the selected color
depth and resolution. The “Back to Default” option is used to
reset the refresh rate to the factory default value.

To open Screen Control, double click on its icon. The
following figure shows the Screen Control interface:

62 SBC-492 User's Manual

Configuring the Display Driver

1. Select the color depth first. If the current driver does not
support the selected color depth, then Windows will have to
be restarted.

2. Select the resolution.

3. Select the font size (if available as an option).

4. Select the refresh rate.

5. Click on OK. If the current driver does not support the
selected configuration, Windows will have to be restarted.

Note: Hot Key Control should be enabled before

going into advanced setup. There is no virtual
screen support for 16 colors. 1280x1024 is
only available for 16 colors.

Chapter 4 SVGA Setup 63

Advanced features (Virtual Screen Control)

Virtual Screen Control

Standard display resolutions are 640x480, 800x600, 1024x768,
1280x1024. The amount of display memory used depends on the
selected resolution and color depth. A substantial amount of
display memory is left unused for lower resolutions. The Virtual
Screen features take advantage of this unused memory by “expand­ing” the display area into the off-screen area.

Virtual Screen Control allows the user to make effective use of a
display screen larger than the standard 640x480, 800x600 or
1024x768, and the standard resolution is the center of the screen.
The user can “pan” around the larger Virtual Screen area by the use
of a standard mouse or a set of “HOT KEYS.” For example, it is
possible to select a resolution of 640x480 and set the Virtual
Screen size to 800 x 600. Thus, the 640 x 480 screen sits at the
center of a 800 x 600 matrix, and the user can “pan” through the
entire 800x600 matrix in a 640x480 window, as shown below.

Panning allows trav ersing a larger screen through a smaller window .

VIRTU AL SCREEN AREA ACTUAL DISPLAY AREA

64 SBC-492 User's Manual

The advanced features can be accessed by pressing <ALT> + D
or by clicking on the Advanced... button on the Screen Control
interface. This opens up an extension of the Main Panel that
presents the following features:

1. Hot Key selection, which allows you to set up predefined
key strokes for specific virtual screen related actions.

2. Turn On virtual screen, which allows the use of thepre-
defined virtual screen sizes. The predefined virtual screen
sizes are selected by clicking next to available options. The
sizes of the available predefined virtual screens are depen­dent on the selected color depth and resolution.

3. Customize virtual screen area, which opens up a new screen
titled Virtual Screen Advanced Settings:

Chapter 4 SVGA Setup 65

Virtual Screen Advanced Settings

• Freeze Screen: Disables the panning feature, giving the

illusion of a frozen screen but keeping other virtual screen
functions available. Hot key functions are available for this
feature.

• Linear Frame Buffer Address: The Linear Addressing

driver automatically detects the system’s memory size and
sets the frame buffer to an unused area above the system
memory. The Linear Frame Buffer Address setting is useful in
avoiding conflicts with Windows applications, which use the
same linear frame buffer address as the Display Driver.
Addresses between 18 and 63 MB can be selected. If there is
no conflict, the default setting is highly recommended.

• Border Space: The Border Space option is used to set up a

border (thickness measured in pixels) within the displayable
area. The border is used as a marker for panning the screen,
i.e. when the cursor hits against this border, screen panning
occurs as shown below:

• Pan Set Hot Key: Hot keys can be set up to pan the virtual

screen left, right, up and down. The feature has to be enabled
by clicking on the Enable box before hot keys can be select-
ed.

Once all selections are made, click on OK or press <ALT> + O
to exit the advanced setup.

66 SBC-492 User's Manual

DPMS (Display Power Management

Signaling)

The POWER MANAGEMENT program is designed for energy­saving monitors that conform to the VESA Display Power
Management Signaling (DPMS) standard.

WARNING:

The program offers three power-down modes:

1. Standby (minimum power savings)

2. Suspend (substantial power savings)

3. Off state (maximum power savings)

THE USE OF THIS PROGRAM IS NOT RE­COMMENDED FOR MONITORS THA T DO NOT
SUPPORT THE VESA DPMS ST ANDARD.

Chapter 4 SVGA Setup 67

The program monitors for mouse and/or keyboard activity . When
activity is not detected for a specified delay period (controlled by
the Delay Time parameter), the program signals the
TGUI9440AGi to enter the selected power-down modes.

The Display Power Management program offers several options
to customize the DPMS operation.

Delay Time

The delay time to enter each mode can be set by entering the
value (in minutes) in the Delay Time parameters. Values can be
entered by either clicking on the count-up or count-down button,
or by clicking on the number, deleting it, and typing in the desired
time in minutes, as shown below.

Activity Select

The Activity Select option selects which activity the program
senses in order to restore the display to the monitor. For exam­ple, if both mouse and keyboard are selected, then either activity
will re-establish the powered down signals.

Clock

Turning on the clock enables the digital count down display. If the
Alarm option is enabled, then the last 5 seconds of countdown to
Standby mode is synchronized with beeps from the PC speaker.

68 SBC-492 User's Manual

Password Option

The Password Option sets up a password to get back onto the
screen.

• A password is set up by first clicking on the box marked
PASSWORD PROTECTED or by pressing <ALT> + P (this is
confirmed by the presence of an “X” in the box).

• Press <ALT> + S or click on the box marked SET PASSWORD.

• Type in the selected password (twice) and select OK, or press
<ENTER>.

Startup On/Off

This option installs the Display Power Management program onto
the Windows Startup file, so that DPMS is active upon entering
Windows.

Default

The default button sets all parameters back to the factory default
values.

Test

The test feature is used to give a demonstration of the DPMS
power down function.

Save

This feature is used to save all the current settings. Once all
settings are selected, the program is activated by pressing <ALT>
+ O or by clicking on the box marked Turn On DPMS.

Chapter 4 SVGA Setup 69

Display driver Uninstallation

The UNinstall program enables the user to safely delete specific
display drivers or an entire display driver set.

To remove an entire Display Driver Set, complete the following
steps:

1. Using the arrow keys or mouse, select the Display Driver
Set that is to be removed (the set to be deleted should be
highlighted).

2. Once the desired Driver Set is selected, simply select the
Delete button or press <ENTER>.

NOTE: The UNinstall program will not permit the

deletion of a Display Driver set that is currently
being used.

To remove an individual driver from a Display Driver Set, com­plete the following steps:

1. Using the arrow keys or mouse, select the Display Driver
Set that is to be removed (the set to be deleted should be
highlighted).

2. Once the desired Driver Set is selected, click on the Enter
button. This will pull up a list of available display drivers.

3. Select the display driver to be deleted by using the mouse or
the up/down arrow keys to scroll through the list.

4. Click on the Delete button or press <ALT> + D to delete the
selected display driver.

70 SBC-492 User's Manual

Microsoft Windows NT

Installation

1 . Run the Microsoft Windows NT Setup program located in

the Main group of Program Manager.

2. Select Change System Settings from the Options pulldown

menu.

3. Select Other from the display options.

4. Microsoft Windows NT 3.1 will prompt you for the correct
path where the Trident drivers are located. Enter the
path “X:\TVGAUTIL\NTDRV\NT31\” where X is the drive
where Microsoft Windows NT 3.1 drivers have been installed.

5. A list of all Trident drivers will appear. Select the resolution
and color depth desired.

6. Restart Microsoft Windows NT. The desired Trident driver
will then be in effect.

NOTE: If you select a color depth or resolution that is

not supported by your card, NT will substitute
640x480 in 256 colors for the display.

Microsoft Windows NT 3.5 Installation

1. Run the Microsoft Windows NT display Setup program
located in the Control Panel of the Main group.

2. Select Change Display Type... button from the Display
Settings options.

3. Select Change... button from the Display Type options.

4. Select Other... button from the Select Device options.

Chapter 4 SVGA Setup 71

5 . Microsoft Windows NT 3.5 will prompt you for the correct

path where the Trident drivers are located. Enter the
path “X:\TVGAUTIL\NTDRV\NT3.5\” where X is the drive
where Microsoft Windows NT 3.5 drivers have been installed.

6. A list of all Trident drivers will appear. Select the resolution
and color depth desired.

7. Restart Microsoft Windows NT. The desired Trident driver
will then be in effect.

NOTE: If you select a color depth or resolution that is

not supported by your card, NT will substitute
640x480 in 256 colors for the display.

Microsoft Windows NT4.0

Procedure to install display drivers:

1. Open Windows NT 4.0.

2. Click the START button (lower left hand corner of the
screen).

3. Click on SETTINGS.

4. Click on CONTROL PANEL.

5. Double click on the DISPLAY icon.

6. Click the SETTINGS tab.

7. Click DISPLA Y TYPE.

8. Click the CHANGE button under ADAPTER TYPE.

9. Click the button HA VE DISK.

10 .Type the path to where the drivers are located (example A:\).

11.Click OK.

12 .You will see one driver listed “Trident Video Accelerator” .

Click OK to select it.

72 SBC-492 User's Manual

13 . Click YES to continue.
14 . Click OK to continue.
15 . Click the CLOSE buttons.
16 . Click YES when prompted to restart NT 4.0.

Microsoft Windows 95

Procedure to install display drivers:

1 . Go to Windows 95.
2 . Click the Windows 95 Start button.
3 . Select Settings.
4 . Select Control Panel.
5 . Double click the Display Icon.
6 . Click the Settings tab.
7 . Click on Change Display Type...
8 . Under “Adapter Type”, click Change.

9. Click Have Disk...

10. Type the path to where the drivers are located, and click O.K.
(example: A:\ if the driver files are located in the A drive)

11 . Click O.K. There should only be one compatible driver listed.

If you see more than one driver listed, select "Trident 9440
Linear Accelerated for PCI".

12 . Click Close.
13 . Click Apply.
14 . Click Y es to restart your W indows 95.

Chapter 4 SVGA Setup 73

OS/2

Procedure to install display drivers:

This Trident OS/2 Display Drivers utility supports the following
resolutions with OS/2:

640x480x256
800x600x256
1024x768x256
1280x1024x256 (2M)
640x480x65K
800x600x65K (2M)
1024x768x65k (2M,)
640x480x16.7M

This utility includes Trident OS/2 Display Drivers installation and
Trident OS/2 Display Drivers setting.

Installation Procedure

1. Insert Trident OS/2 Display Drivers diskette in Drive A.
From the OS/2 Desktop: Open the OS/2 System folder, double-

click on the Drives object, and then double-click on drive A.
When the drive A folder opens, double-click on INSTALL.EXE.
You can also click on the floppy drive object from Launch Pad,
and then double-click on INST ALL.EXE.

From the OS/2 Command Line: Open OS/2 System folder,
double-click on Command Prompts, and double-click on either
OS/2 Window or OS/2 Full Screen. Then, at the command line,
go to drive A and type: INST ALL.EXE and press Enter.

2. The first page of the installation program’s window is Screen
Resolution selection page.

• Select the resolution and color depth.

3. The second page is Monitor Model selection page.

• Click on Monitor tab to go to this page.

• Point to and click on the down arrow button to show a list of

monitor models.

• Select the monitor model. If you cannot find your monitor’s

model, select “Default”.

74 SBC-492 User's Manual

4. The third page is Refresh Rate selection page.

• Click on Refresh tab to go to this page.

• The refresh rates displayed are the recommended refresh rate

for each resolution by your monitor manufacturer.

• You can change the refresh rates by clicking on down arrow

button to select the refresh rates for corresponding resolution.

5. The fourth page is Frame Buffer Address selection page (Vesa
Local Bus Adapter only).

• Click Desktop tab to go to this page.

• Point to and click the down arrow button to show a list of

available frame buffer address (in unit of MBytes).

6. After the selections, click on the Install button to complete the
installation.

7. Reboot OS/2 to have this installation take effect.

Display Drivers Setting Procedure

1. Double-click on the Trident folder, and then double-click
Display Setting object.

2. To change resolution and/or color depth

• Click Screen tab.

• Select the resolution and color depth.

• Click Set button.

3. To change refresh rate

• Click Refresh tab.

• Point to and click down arrow button.

• Select the refresh rate.

• Click Set button to take effect.

• If you don’t want the selected refresh rate, click Undo

button or press ‘U’ key to return to previous refresh rate.

4. To change frame buf fer address (Vesa Local Bus Adapter only)

• Click Desktop tab.

• Point to and click the down arrow button to show a list of

available frame buffer address (in unit of MBytes).

• Click Set button.

Chapter 4 SVGA Setup 75

5. Virtual Screen Support

• Click Screen tab

• Click Virtual Screen On button to enable V irtual Screen.

• Click again to disable Virtual Screen.

• Select the resolution and color depth.

• Click Set button.

• If V irtual Screen is on, the selected width and height are

smaller than current screen width and height, and the selected
color depth is same as current color depth, it will dynamically
change the resolution.

If you have selected to change resolution and/or frame buffer
address, you must reboot OS/2 to have the changes take
effect.

Note: If you decide to change your hardware system configura

tion, such as upgrading video memory or system memory,

you should

• Change resolution to 640x480x16(VGA).

• Change hardware configuration.

• Reinstall Trident OS/2 Display Drivers.

Y ou can add or delete monitor models by modifying
TMONITOR.INF file in this utility diskette.

The format of each line in this file is:

• The monitor model and company name inside two double

quote marks.

• Four recommended refresh rates data for 640x480, 800x600,

1024x768, and 1280x1024 resolutions.

• Four maximum supported refresh rates data for 640x480,

800x600,1024x768, and 1280x1024 resolutions. If some
resolutions are not supported, put “0” in it.

If you add a line

FrameBufferAddress=xxx

where xxx is frame buffer address in unit of MBytes into
TR_AGI.INF file, display drivers will set frame buffer to
this address.

76 SBC-492 User's Manual

Utilities installation

The Utility Installation program is used to install and retrieve
instructions on:

a) Utility programs.
b) Non-Windows applications display drivers.
The Utility installation program is run by executing the follow-

ing steps:

1. Insert the DOS utility driver disk in the floppy drive.

2. Type C:\DOS\README at the floppy drive prompt.

3. A numbered list of available destination drives will be

displayed on the screen. Select the destination drive by
typing in the corresponding number, e.g. to select drive C,
type in 1, as shown below .

4. Files and subdirectories will be expanded into the newly

created directory TVGAUTIL. A new menu will then be
displayed on the screen, showing a list of on-line instruc­tions:

Chapter 4 SVGA Setup 77

5. Selecting A will display the contents of all drivers in the list.
6 . Selecting B will display instructions on the available utility

programs.

7. Selecting C will display instructions on how to install display

drivers for non-Windows applications.

Utilities summary

SVM. EXE

SVM is a menu-driven program designed to select and test all
video modes available to the adapter.

How To Use SVM

The SVM program can be executed in either of two ways: by
calling up the menu and selecting from the menu choices, or by
entering the desired mode directly with a specific command line.

How To Use SVM From The Menu

1. Switch directory to “X:\TVGAUTIL\UTILITY” where X is the

drive where the Trident Utility and DOS Application drivers
have been installed .

2. Type SVM to pull up the menu. You will see the screen on the
following page.

78 SBC-492 User's Manual

The top bar shows the available color depths. Move
through the options with the right/left arrow keys.

The program provides all the different resolutions support­ed by the chip under each color depth. These resolutions
are traversed by the up/down arrow keys.

The graphics adapter can be tested for each resolution/
mode by first highlighting the selection by use of the
arrow keys, then pressing the F5 key.

The graphics adapter can be run at a selected mode by first
selecting the mode, and then pressing <ENTER>.

How to Use SVM From The Command Line

The SVM program may be used to select a mode directly
from the command line following two simple steps:

1. Switch directory to “X:\TVGAUTIL\UTILITY” where X

is the drive where the Trident Utility and DOS Applica­tion drivers have been installed.

2. Type in: SVM [mode number]<ENTER>.

Chapter 4 SVGA Setup 79

For example, to run the graphics adapter in mode 62H, the command
for item 2 above would be:

SVM 62 <ENTER>

SMONITOR

SMONITOR is designed to set the monitor group and the monitor
type:

Usage: SMONITOR <GROUP|OPTION>

Set Monitor Group

The graphics extended modes set by the graphics card’s BIOS are
sorted into six groups categorized by the monitor’s refresh rate.
The group setting as below:

Resolution Group

01 23 45 67

640X400 70 70 70 70 70 70 70 70
640x480 60 60 75 85 95 95 95 95
800x600 56 60 75 75 85 85 95 95
1024x768 87 i 87 i 60 70 75 85 95 95
1280x1024 87i 87 i 8 7 i 87 i 60 60 60 60
1600x1200 87i 87 i 8 7 i 87 i 87 i 87 i 87i 8 7 i

OPTION:

C SET COLOR MONITOR
M SET MONOCHROME MONITOR

The default group number is 4.
If you want set the monitor group, type:

SMONITOR GROUP

where GROUP is one of the group number listed above.

80 SBC-492 User's Manual

Set Monitor Color

Switches between color and monochrome display. Some monitors
(most notably Samsung monitors manufactured before 2/8/91) do
not adhere to the standard IBM pinout definitions, which causes
the VGA card to boot up in monochrome instead of color. This
utility may be used to correct the problem.

To set the monitor as color, type: SMONITOR C
or type: SMONITOR M
to set monochrome monitor.

Tmonitor

The Tmonitor program allows the adjustment of CRTC display
parameters so that images are optimally sized and centered on the
screen. Adjustable parameters include:

• Horizontal size and position.

• Vertical size and position.

• Pixel frequency.
The program is started from the DOS prompt by typing

Tmonitor from the C:\TVGAUTIL\UTILITY directory.
The first section of the program is used to define a given name

for the adjustments to be made.

Chapter 4 SVGA Setup 81

1. Press <ENTER> to add a new monitor entry and type in the
name of the manufacturer, followed by <ENTER> keystroke.
The program will allow any name to be typed in.

2. Type in the associated comments for the monitor settings
and press <ENTER>.

3. A mode table will be displayed, presenting all the adjustable
modes as shown below:

4. This table is traversed through the use of the up/down
arrow keys. The mode highlighted is the selected mode for
adjustment.

5. Select the mode to be adjusted and press <ENTER>.

6. Select the desired pixel rate by scrolling the list using the up/
down arrow keys, followed by pressing <ENTER> twice.

7. The screen alignment test pattern will then be displayed.
The up/down arrow keys are used to adjust the vertical
positioning of the screen. The left/right arrow keys are
used for horizontal alignment of the screen. The Home/End
keys are used for horizontal screen sizing and the Page
Up/Down keys are used for vertical screen sizing. Once the
screen position and size is adjusted, press <ENTER>,
followed by the <ESC> keystroke.

82 SBC-492 User's Manual

8. To save the settings, type Y and press <ENTER>. The
program will then modify the Config.sys file.

9. At this point press <ESC> and reboot the system to enable the
parameter changes.

Software drivers installation

After selecting Drivers from the Main Menu in Program Manager,
you will be presented with a list of possible drivers to install.
Select the driver(s) you wish to install. A version list will be given
for the given application. Choose the appropriate version for the
application. Once you have selected the driver, the installation
program will provide you with further instructions. For details on
installing each available driver, refer to the README.TXT file on
the provided Utiltiy disk.

The following is a list of drivers supported by the SBC-492.
AutoCAD Autoshade

V ersaCAD GEM Desktop
Lotus MS Windows
MS Word OS/2 Presentation Manager
Symphony Ventura
W ordPerfect S CO
Quattro Pro VESA BIOS Extension (for VESA

standard SVGA drivers)

TM

Chapter 4 SVGA Setup 83

84 SBC-492 User's Manual

APPENDIX

A

Watchdog Timer

Demo Program

The following demo program illustrates
the programming steps required to enable,
set, and disable the watchdog timer.

Appendix A Watchdog Timer Demo Program 85

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 1 ~ 127 will
denote 1sec ~ 127sec, though 129 ~ 255 will denote lmin ~
127min. e.g.

outportb(0x443, 30); // set interval to 30 seconds
outportb(0x443, 0x85); // set interval to 5 minutes

2. T o 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. T o disable watchdog timer:

-- output any value to port 0x80, e.g.

outportb(0x80, data); // 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(0x80, 0); // disable watchdog timer
inportb(0x443); // refresh watchdog timer

* note: if you want to refresh the watchdog timer, you have to
disable it first.

86 SBC-492 User's Manual

Demo program

outportb(0x444, 0): // set time-out event to reset-system
outportb(0x443x 10); // set time-out interval to 10 seconds
iutportb(0x443); // enable watchdog timer
customer_job(); // execute your job here, be sure your

job will finished within 10 seconds

outportb(0x80, 0); // refresh watchdog timer, otherwise

the system will reset after time-out

outputb(0x443, 20); // set time-out interval to 20 seconds
inportb(0x443); // enable watchdog timer
another_job(); // another job finished in 20 seconds
outportb(0x80, 0) // disable watchdog timer

...
...

Appendix A Watchdog Timer Demo Program 87

88 SBC-492 User's Manual

B

APPENDIX

Installing PC/104

Modules

This appendix gives instructions for
installing PC/104 module.

Appendix B Installing PC/104 Modules 89

Installing PC/104 modules

The SBC-492's PC/104 connectors give you the flexibility to attach
PC/104 expansion modules. These modules perform the functions
of traditional plug-in expansion cards, but save space and valuable
slots. Modules include:

• PCM-3110B PCMCIA Module (one-slot)

• PCM-31 15B PCMCIA Module (two-slot)

• PCM-3200 PC/104 Sound Module

• PCM-3420 PC/104 Fast SCSI Module

• PCM-3521 Advanced Flat-Panel/CRT VGA Module

• PCM-3522 LCD Panel Adapter

• PCM-3600 PC/104 Fax/Modem Module

• PCM-3610 Isolated RS-232 and RS-422/485 Module

• PCM-3640 PC/104 4-port RS-232 Module

• PCM-P50 PC/104 V ehicle Power Supply

• PCM-3660 Ethernet Module

• PCM-3718 30 KHz A/D Module

• PCM-3724 48-channel DIO Module

T o install these modules on the SBC-492 is a quick and simple
operation. The following steps show how to mount the PC/104
modules:

Step1 Remove the SBC-492 from your system. Pay

particular attention to the safety instructions already
mentioned above.

Step2 Make any jumper or link changes required to the CPU

card now. Once the PC/104 module is mounted you
may have difficulty in accessing these.

90 SBC-492 User's Manual

Step3 Normal PC/104 modules have "male" connectors and

can be mounted directly onto the main card. However,
for reasons that ensure better bus matching, the
connectors on the SBC-492 and the PC/104 module are
both "female". For this reason you need to plug-in a
"male-male" adapter (included with the SBC-492).
Please refer to the following PC/104 module mounting
diagram on the following page. After this is in place you
then have the correct mounting connector toaccept
your PC/104 module.

Step4 Mount the PC/104 module onto the CPU card. Do this

by pressing the module firmly but carefully onto the
mounting connectors.

Step5 Secure the PC/104 module onto the CPU card using the

four mounting spacers and srews.

Appendix B Installing PC/104 Modules 91

PC/104

Mounting Support

SBC-492

CPU Card

PC/104 Module Mounting Diagram

3.775

3.575

0.200
0

PC/104 Module dimensions (inches ±5%)

92 SBC-492 User's Manual

PC/104 Mounting

3.500

0.200

0

MaleFemale Male Female

PC/104 Module

Adaptor

3.250

3.350

Male

3.575

0.200

3.550