AAEON SBC-490 SBC-490 User Manual 1st edition

SBC-490

Full-size 486 PCI/ISA-bus CPU Card

with SVGA interface

Copyright Notice

This document is copyrighted, 1995, 1996, 1997 by AAEON
T echnology Inc. All rights are reserved. AAEON Technology 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.
A ward is a trademark of Award Software International, Inc
Cyrix is a trademark of Cyrix Corporation.
IBM, PC/AT, 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. 2006490021 for SBC-490 B1 1st Ed. (AMI)

Printed in Taiwan March 1997

Packing list

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

• 1 SBC-490 CPU card

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

• 1 hard disk drive (IDE) interface cable (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, Watchdog for Windows

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...................................................... 10

Locating jumpers and connectors ...................................... 11

Setting jumpers .................................................................... 12

Safety precautions................................................................ 13

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

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

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

CPU type select (JP8, JP9, JP10) ........................................ 15

CPU Vcc select (JP1, JP7) .................................................. 16

CPU clock select (JP13, JP14) ............................................ 16

Installing DRAM (SIMMs) ................................................. 17

Installing SIMMs ................................................................ 17

Removing SIMMs ............................................................... 17

SIMM Module Installation Table....................................... 18

Selecting cache memory size ............................................... 19

Cache memory select (JP12)............................................... 19

IDE hard drive connections ................................................ 20

Connecting the hard drive ................................................... 20

IDE LED (JP2, JP3) ............................................................ 21

Floppy drive connections..................................................... 22

Connecting the floppy drive................................................ 22

Parallel port.......................................................................... 23

Installing the retaining bracket............................................ 23

Power supply connections ................................................... 24

Power supply connector ...................................................... 24

CPU fan power connector ................................................... 24

Display connections.............................................................. 25

Keyboard and PS/2 mouse connectors............................... 26

On-Board VGA Settings...................................................... 26

Serial ports............................................................................ 27

RS-232 connections (COMA, COMB) ............................... 27

Serial ports IRQ select (JP18) ............................................. 28

Watchdog timer setup ......................................................... 29

Watchdog timer time-out

signal select (JP16).............................................................. 29

Watchdog timer programming ............................................ 29

Flash BIOS Protect (JP11) .................................................. 30

Clear CMOS (JP15)............................................................. 30

External Switches and LEDs............................................... 31

Power LED and keylock ..................................................... 31

External speaker .................................................................. 31

Reset switch ........................................................................ 32

Turbo LED .......................................................................... 32

Turbo switch........................................................................ 32

Chapter 3: AMI WinBIOS Setup .................................. 33

General information ............................................................ 34

Starting WinBIOS setup...................................................... 34

WinBIOS main menu .......................................................... 34

Using a mouse with WinBIOS setup .................................. 35

Using the keyboard with WinBIOS setup ........................... 35

Setup...................................................................................... 36

Standard Setup .................................................................... 36

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

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

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

PCI/PnP Setup...................................................................... 45

Peripheral Setup .................................................................. 47

Utility..................................................................................... 49

Security ............................................................................... 50

Two Levels of Passwords.................................................... 50

Setting a Password .............................................................. 51

Changing a password .......................................................... 52

Anti-virus ............................................................................ 52

Default................................................................................... 53

Original ............................................................................... 53

Optimal................................................................................ 53

Fail-Safe .............................................................................. 53

Exiting WinBIOS ................................................................. 54

Chapter 4: SVGA Setup .............................................. 55

SVGA driver installation..................................................... 56

Installing from Windows .................................................... 56

Screen Control...................................................................... 58

Advanced features (Virtual Screen Control)....................... 60

DPMS (Display Power Management Signaling) ............... 63

Delay Time.......................................................................... 64

Activity Select..................................................................... 64

Clock ................................................................................... 64

Password Option ................................................................. 65

Startup On/Off..................................................................... 65

Default................................................................................. 65

Test ...................................................................................... 65

Save ..................................................................................... 65

Display driver Uninstallation.............................................. 66

Microsoft Windows NT ....................................................... 67

Installation........................................................................... 67

Microsoft Windows NT 3.5 Installation ............................. 67

Microsoft Windows NT4.0 ................................................. 68

Procedure to install display drivers:.................................... 68

Microsoft Windows 95........................................................ 69

Procedure to install display drivers:.................................... 69

OS/2..................................................................................... 70

Procedure to install display drivers:.................................... 70

Display Drivers Setting Procedure...................................... 71

Utilities installation .............................................................. 73

Utilities summary ................................................................ 74

SMONITOR ........................................................................ 76

TVGACRTC ....................................................................... 77

Software drivers installation............................................... 79

Appendix A: Watchdog Timer Demo Program ......... 81

DOS Demo Program ............................................................ 82

Appendix B: Installing PC/104 Modules .................... 85

Installing PC/104 modules................................................... 86

1

CHAPTER

General

Information

This chapter gives background informa­tion on the SBC-490.

Sections include:

• Card specifications

• Board layout

Chapter 1 General Information 1

Introduction

The SBC-490 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-490 is fully PC/AT
compatible, so your software will run without modifications.

The SBC-490 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.

In addition, the SBC-490 features a high speed PCI-bus IDE control­ler, which connects up to four IDE devices, including large hard disks,
CD-ROM drives, tape backup drives or other IDE devices. It supports
(through ATA PIO) mode 3 and mode 4 hard disks, enabling transfer
rates of over 11 MB/sec. The built-in enhanced IDE controller
provides a 4-layer 32-bit posted write-buffer and a 4-layer 32-bit read­prefetch-buffer to boost IDE performance.

On-board features also include two high-speed RS-232 serial ports
with 16C550 UARTs, one bidirectional SPP/EPP/ECP parallel port
and one floppy drive controller. In addition to the 486's 8 KB of on­chip cache memory, the SBC-490 comes with an extra 128 KB or 512
KB of second level memory on-board.

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

The SBC-490 supports 5V EDO DRAM. It also provides four 72-pin
SIMM (Single In-line Memory Module) sockets for its on-board
system DRAM. These sockets give you the flexibility to configure
your system from 1 MB to 128 MB of DRAM using the most eco­nomical combination of SIMMs. For optimal power management, the
SBC-490 also supports the "Green" function.

2 SBC-490 User's Manual

Features

• Accepts Intel, AMD, Cyrix or other 486-compatible processors, including

the P24T Pentium Overdrive processor

• Fully PC/AT-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

• Two high-speed serial RS-232 ports (16C550 UARTs with 16-byte FIFO);

IRQ3, 4, 10, 11 can be individually selected

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

• Watchdog timer (15 steps, 2 seconds per 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: 80486SX/DX/DX2/DX4-25/33/40/50/66/75/100/120 MHz, AMD/

Cyrix 5x86-100/120/133 MHz or Pentium Overdrive processor

• Bus interface: ISA (PC/AT) and PCI bus

• Data bus: 32 bit

• Processing ability: 32 bit

• Chipset: ALI/1489/1487

• RAM memory: 1 MB to 128 MB. Uses four 72-pin SIMM sockets

• L2 Cache memory size : 128/256/512 KB 2nd level cache memory

• Shadow RAM memory: Supports system and video BIOS shadow

memory

• Display controller: SVGA, PCI-bus, Trident TGUI9440GUI chipset with

1 MB standard video memory, upgradable to 2 MB. Provides 32-bit
graphic throughput. Supports resolutions up to 1280 x 1024 in 256 colors,
1024 x 768 in 64K colors, 800 x 600 in 64K colors, or 640 x 480 in 16.8
million colors

• Feature connector: 26-pin header

• Enhanced IDE hard disk drive interface: Fast PCI bus. Supports up to

four enhanced IDE hard disk drives or other IDE devices.

• Floppy disk drive interface: Supports up to two floppy disk drives, 5.25"

(360 KB and 1.2 MB) and/or 3.5" (720 KB, 1.44 and 2.88 MB)

• Bidirectional parallel port: Configurable to LPT1, LPT2, LPT3 or

disabled. Supports SPP/EPP/ECP standards

• Serial ports: Two serial RS-232 ports; use 16C550 UARTs with 16-byte

FIFO buffer. Supports speeds up to 115 Kbps. Ports can be individually
configured from COM1 to COM4 or disabled.

• Flash BIOS: SST 29EE010 Flash memory on board. BIOS can be

upgraded easily.

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

interval is software selectable from 2 to 32 seconds (15 steps, 2 seconds
per step).

4 SBC-490 User's Manual

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

• DMA channels: 7

• Interrupt levels: 15

• Keyboard or PS/2 mouse connector: A 6-pin mini DIN keyboard

connector is located on the mounting bracket for easy access to the
keyboard and PS/2 mouse.

• Bus speed: 8 MHz (up to 12 MHz) for ISA bus; 20/25/33 MHz for PCI bus

(dependent on CPU clock speed)

• System performance: 325 MHz with a 80486 DX4-100 (Landmark V2.0)

• Max. power requirements: +5 V @ 2 A

• Power supply voltage: +5 V (4.75 V to 5.25 V), +12 V, -12 V

• Operating temperature: 32 to 140° F (0 to 60° C); a cooling fan is needed

for DX4-100, 5x86 and P24T CPUs.

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

• Board weight: 1.2 lbs (0.5 kg)

Chapter 1 General Information 5

Board layout

DS14185

SMC

FDC37C665

Trident

TGUI9440AGi

DS14185

TC5142560BJ-70 TC5142560BJ-70

24.00

AWARD

AWARD SOFTWARE INC

BIOS ISA 486

M1487

-2

TM

AMIKEY

ODIN

OEC12C887

ALI

16V8

32K8 CACHE RAM

32K8 CACHE RAM

6 SBC-490 User's Manual

32K8 CACHE RAM

32K8 CACHE RAM

32K8 CACHE RAM

ALI

M1489

SBC-490 486SX/DX/DX2/DX4 CPU Card Rev. B1

IMI

SC464

14.318

Card dimensions

4.803"

13.327"

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-490 User's Manual

2

CHAPTER

Installation

This chapter describes how to set up the
SBC-490 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
JP2 Secondary IDE LED
JP3 Primary IDE LED
JP4, 5, 6 On-board VGA enabled/disabled
JP8, 9, 10 CPU type select
JP11 Flash BIOS protect
JP12 Cache size select
JP13, 14 CPU clock select
JP15 Clear CMOS
JP16 Watchdog timer interrupt select
JP17 Reserve for IR CON
JP18 RS-232 port IRQ select
Primary IDE 1st enhanced IDE connector
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
VGA VGA connector
KB/PS2 Mouse Keyboard and/or PS/2 mouse connector
COMA Serial port 1 connector
COMB Serial port 2 connector

10 SBC-490 User's Manual

Locating jumpers and connectors

EXT-SPK

KEY­LOCK

JP17,
JP18

PRINTER

COMB

FEATURE
CONNECTOR

FLOPPY
DISK

CPU

FAN
PRIMA­RY IDE

JP4,
JP5, JP6

SECOND­ARY IDE

IDE LED (JP2,
JP3)

CPU VCC
(JP1, JP7)

TB LED
TB SW

¬¬

¬

¬¬

SMI OUT
SMI SW

RESET

SIMM
SOCKETS

POWER
CON

32K8 CACHE RAM

DS14185

SMC

FDC37C665

Trident

TGUI9440AGi

32K8 CACHE RAM

32K8 CACHE RAM

COMA

DS14185

TC5142560BJ-70 TC5142560BJ-70

32K8 CACHE RAM

KB/PS2

VGA

MOUSE

-2

TM

AMIKEY

24.00

AWARD

AWARD SOFTWARE INC

BIOS ISA 486

ODIN

OEC12C887

16V8

ALI

M1487

SC464

IMI

14.318

ALI

M1489

32K8 CACHE RAM

SBC 490 486SX/DX/DX2/DX4 CPU CARD Rev. B1

KB
CON

PC/104 MODULE CON­NECTOR

JP15
JP11

JP16

CPU CLK (JP13,

JP14)
CPU TYPE (JP8, JP9,
JP10)

JP12

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. To
“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.

Open Closed Closed 2-3

The jumper settings are schematically depicted in this manual as
follows:

Open Closed Closed 2-3

A pair of needle-nose pliers may be helpful when working with
jumpers.

2

1

1 2 3

3

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.

Generally, you simply need a standard cable to make most
connections.

12 SBC-490 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 the CPU

The SBC-490 CPU card supports most 486 CPUs, as well as the
P24T Pentium OverDrive processor. The system's performance
depends on the CPU you choose. You can install or upgrade the
CPU in the board's ZIF socket by following the procedures
outlined below. If your system has an existing CPU, you need to
remove it before installing the new CPU.

Removing a CPU

1. Pull the lever on the side of the ZIF socket out a little and raise
it up as far as it will go.

2. Lift the CPU out.

Installing the CPU

1. Make sure the ZIF socket lever is up as far as it can go. The
Pin 1 position is at the arm corner.

2. Match Pin 1 on the CPU with the Pin 1 position on the ZIF
socket. The pins on the three inner rings of the CPU should be
aligned with the holes on the ZIF socket.

3. Insert the CPU. If it does not go in easily, lift the lever higher.

4. Press the lever down. The sliding plate will move forward to
position the CPU. You will feel some resistance in the lever as
the CPU is secured into place. When the CPU is properly
installed, the lever will snap into place at the side of the ZIF
socket.

When you install a new CPU, you have to adjust other settings on
the board, such as CPU type, CPU clock and PCI speed, to
accommodate it. Make sure that the settings are correct for your
CPU. Improper settings may damage the CPU.

14 SBC-490 User's Manual

CPU type select (JP8, JP9, JP10)

JP8, JP9, and JP10 must be set to match the CPU type. The chart
below shows the proper jumper setting for their respective CPU.

CPU Type select (JP8, JP9, JP10)

Intel P24T AMD/Intel DX4-100 AMD DX5-133/ Intel 486SX
Intel P24D AMD DX2-66(WB)
Intel DX2-66 (default)
AMD DE2-66

JP 8 9 10 JP 8 9 10

Pin 1

2
3
4
5
6
7
8
9

Pin 1

2
3
4
5
6
7
8
9

Cyrix/IBM/ST Cyrix/IBM/ST/TI AMD
5x86 , DX4 DX2 Series DX2-66(WT)
Series

JP 8 9 10 JP 8 9 10

Pin 1

2
3
4
5
6
7
8
9

Pin 1

2
3
4
5
6
7
8
9

JP 8 9 10

Pin 1

2
3
4
5
6
7
8
9

JP 8 9 10

Pin 1

2
3
4
5
6
7
8
9

JP 8 9 10

Pin 1

2
3
4
5
6
7
8
9

Chapter 2 Installation 15

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

JP

1

JP7

CPU clock select (JP13, JP14)

JP13 and JP14 is used to synchronize the CPU clock with the CPU
type. Set the CPU clock according to the base CPU speed.

CPU clock select (JP13, JP14)

25 MHz 33 MHz 40 MHz 50MHz

A B CA B C

JP13
JP14

A B C

A B C

16 SBC-490 User's Manual

Installing DRAM (SIMMs)

The SBC-490 CPU card provides four 72-pin SIMM (Single In­line Memory Module) sockets and supports between 1 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.

Chapter 2 Installation 17

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 Bank SIMM Module
D: Double Bank SIMM Module

18 SBC-490 User's Manual

Selecting cache memory size

The SBC-490 features a 2nd level memory cache that supports
128, 256, or 512 KB of cache memory. Higher cache memory can
improve your system's performance.

The cache uses SRAM chips in three sizes: 32 KB, 64 KB and 128
KB. The on-board cache memory banks consist of four SRAM
chip sockets, each of which accepts one "Tag" chip. All SRAM
chips must have a speed of 20 ns or faster. The table below shows
the possible cache configurations:

Cache Configuration

Cache size Tag RAM Data RAM

128 KB one 32 KB x 8 four 32 KB x 8 SRAMs
256 KB one 32 KB x 8 four 64 KB x 8 SRAMs
512 KB one 32 KB x 8 four 128 KB x 8 SRAMs

Cache memory select (JP12)

When the cache size changes, you must make sure that JP12 is set
to match the new cache memory size. The following chart shows
the proper jumper setting for each cache configuration:

Cache memory select (JP12)

128 KB 256 KB 512 KB

1 2
3 4

1 2
3 4

1 2
3 4

Chapter 2 Installation 19

IDE hard drive connections

You can attach four Enhanced Integrated Device Electronics
(IDE) hard disk drives to the SBC-490'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 SECOND­ARY 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 one as the slave. You do this using
jumpers on the drives. If you install just one drive, set it as the
master.

20 SBC-490 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
9 D4 10 D11
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 3 8 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 21

Floppy drive connections

You can attach up to two floppy disks to the SBC-490'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-490 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 34-pin 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

22 SBC-490 User's Manual

Parallel port

Normally, the parallel port is used to connect the card to a printer.
The SBC-490 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 9 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 23

Power supply connections

Power supply connector

In single-board-computer (non-passive-backplane) applications
you will need to connect power directly to the SBC-490 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 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-490 provides a cooling fan connector
labeled CPU FAN. 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

24 SBC-490 User's Manual

Display connections

The SBC-490 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 1 2 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 25

On-Board VGA Settings (JP4, JP5, JP6)

You 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

Keyboard and PS/2 mouse connectors

The SBC-490 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

DC

26 SBC-490 User's Manual

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

Serial ports

The SBC-490 offers two RS-232 serial ports. You 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 the
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, COMB. The following sections tell how to make RS­232 connections.

RS-232 connections (COMA, COMB)

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

RS-232 connector pin assignment

Pin no. Signal

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

Chapter 2 Installation 27

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

IRQ1 1 IRQ10

IRQ10 IRQ1 1

IRQ4 IRQ10

IRQ4 IRQ11

IRQ3 IRQ10

IRQ3 IRQ11

IRQ1 1 IRQ3

IRQ1 1 IRQ4

28 SBC-490 User's Manual

IRQ10 IRQ3

IRQ10 IRQ4

Watchdog timer setup

Watchdog timer time-out

signal select (JP16)

If CPU processing comes to a halt because of EMS or a software
bug, the watchdog timer can either reset the CPU or signal an
interrupt on IRQ15.

JP16: WATCHDOG TIMER INTERRUPT SELECT

Disabled 5-6: IRQ15 3-4: NMI
1-2: RESET

Watchdog timer programming

The watchdog timer must be programmed to write to I/O port
address 443 at an interval shorter than the timer's preset interval.
The timer's interval has a tolerance of ±5%, so you should
program an instruction that will refresh the timer before a time-out
occurs. The following steps illustrate how you might program the
watchdog timer.

1. Write to I/O port 443 (Hex) and designate a time-out interval.
This will enable the watchdog and set-up its time-out interval.

2. Write to I/O port 080 (Hex) any random value. This will in
turn disable the watchdog timer.

Chapter 2 Installation 29

The watchdog timer-out interval can be set at 16 levels between 2
and 32 seconds. The following table shows the Hex values for the
appropriate time-out intervals:

Watchdog timer delay values

Delay time Value (Hex) Delay time Value (Hex)

0~2 F 16~18 7
2~4 E 18~20 6
4~6 D 20~22 5
6~8 C 22~24 4
8~10 B 24~26 3
10~12 A 26~28 2
12~14 9 28~30 1
14~16 8 30~32 0

Flash BIOS Protect (JP11)

You can set the JP11 to protect BIOS write-enable. The configu­ration is as follows:

JP11: FLASH BIOS PROTECT

Write Protect Write Enabled

Clear CMOS (JP15)

You can clear the CMOS data by setting JP15.

JP15: CLEAR CMOS

PROTECT CLEAR CMOS

30 SBC-490 User's Manual

External Switches and LEDs

Power LED and keylock

You 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 31

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

You 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

32 SBC-490 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 33

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:

34 SBC-490 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 Numeric

ê

Move to the next field to the right, left, above,
or below.

previous level.

are not case sensitive.

keypad.

Chapter 3 AMI WinBIOS setup 35

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.

36 SBC-490 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 heards),

• WP(starting write precompensation cylinder),

• Sec (number of sectors),

• Size (drive capacity).

Chapter 3 AMI WinBIOS setup 37

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.

38 SBC-490 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 settings are
C:,A:,CDROM, CDROM,A:,C:, or A:,C:,CDROM. The default
settings are 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 settings are On or Off. The
default settings are on.

Chapter 3 AMI WinBIOS setup 39

Turbo Switch:

Set this option to Enabled to permit AMIBIOS to control the
hardware turbo (speed) switch. The settings are Enabled or

Disabled.

Floppy Drive Swap:

Set this option to Enabled to permit drives A: or B: to be
swapped. The settings are Enabled or Disabled. The default
settings are Disabled.

Floppy Drive Seek:

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

Mouse Support:

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

System Keyboard:

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

Primary Display:

This option specifies the type of display monitor and adapter
in the computer. The settings are Mono, CGA40, CGA80,

EGA/VGA, or Absent. The Optimal and Fail-Safe default
settings are EGA/VGA..

Display Device:

This option allows user to select display device. The settings are
CRT, LCD, and Both. The Fail-Safe default setting is Both.

40 SBC-490 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
defaults are Setup.

Parity Check:

Set this option to Enabled to check the parity of all system
memory. The settings are Enabled or Disabled. The Optimal and
Fail-Safe default settings are Disabled.

OS/2 Compatible Mode:

Set this option to Enabled to permit AMIBIOS to run with IBM
OS/2. The settings are Enabled or Disabled. The default settings
are 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 settings are
Enabled or Disabled. The Optimal and Fail-Safe default settings
are 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 settings are Enabled or Disabled. The Optimal and
Fail-Safe default settings are Enabled.

Chapter 3 AMI WinBIOS setup 41

Internal Cache:

This option specifies the caching algorithm used for L1 internal
cache memory. The setting 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.

42 SBC-490 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

Enabled

Disabled

The contents of C0000h - C3FFFh are written to the

same address in system memory (RAM) for faster

execution.

The contents of the named ROM area are 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.

The video ROM is not copied to RAM. The contents of

the video ROM cannot be read from or written to cache
memory.

Chapter 3 AMI WinBIOS setup 43

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 FunctionDisabled/Enabled
A T Bus Clock 7.16

CPU Bus Speed/3
CPU Bus Speed/4
CPU Bus Speed/5
CPU Bus Speed/6
CPU Bus Speed/8

DRAM Read Timing Slow

Normal
Faster
Fastest

44 SBC-490 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 FA ST

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 15-16 M Disabled

Enabled

ISA I/O Recovery Disabled

Enabled

ISA I/O Recovery Time 0.5 ms

1.0 ms

1.5 ms

2.0 ms

2.5 ms

3.0 ms

3.5 ms

Cx5x86 Linear Wrapped Mode Disabled

Enabled

System Hidden Refresh 15 ms

30 ms
60 ms
120 ms

Chapter 3 AMI WinBIOS setup 45

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 settings are

disabled.

46 SBC-490 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
settings are Yes.

Chapter 3 AMI WinBIOS setup 47

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 setting is PCI and
ISA (Default).

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 settings
are 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 settings are Auto.

48 SBC-490 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 settings are PCI/PnP.

Chapter 3 AMI WinBIOS setup 49

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 settings are 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.

50 SBC-490 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 51

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, 378, 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.

52 SBC-490 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 53

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.

54 SBC-490 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 t If this
feature is enabled, you can select WINBIOS. Setup message is in
different languages. The default settings is English.

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 password or User .

Chapter 3 AMI WinBIOS setup 55

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 WinBIOS.

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.

56 SBC-490 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!!!

Default

The icons in this section permit you to select a group of settings

Chapter 3 AMI WinBIOS setup 57

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.

58 SBC-490 User's Manual

Exiting WinBIOS

You can exit WinBIOS 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 59

User's Note

This is a temporary AMI WinBIOS set-up manual for our new
BIOS version 2.x. These insert pages will update the old
jumper setting and replace the chapter 3 of this attached
manual. We are sorry for this inconvenience and thanks for your
attention.

60 SBC-490 User's Manual

4

CHAPTER

SVGA Setup

The SBC-490 features an on-board VGA
interface. This chapter provides informa­tion about:

•SVGA installation

•Display utilities and drivers

•Software installation

Chapter 4 SVGA Setup 55

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.

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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 57

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:

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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 59

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 traversing a larger screen through a smaller window.

VIRTUAL SCREEN AREA ACTUAL DISPLAY AREA

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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 61

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.

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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 63

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.

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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 65

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.

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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 67

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 P ANEL.

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 HAVE 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.

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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 W indows 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 T ype...
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 Yes to restart your W indows 95.

Chapter 4 SVGA Setup 69

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”.

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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 resolu-

tion.

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 buffer 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 71

5. Virtual Screen Support

• Click Screen tab

• Click Virtual Screen On button to enable Virtual Screen.

• Click again to disable Virtual Screen.

• Select the resolution and color depth.

• Click Set button.

• If Virtual 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 configuration,
such as upgrading video memory or system memory, you
should

• Change resolution to 640x480x16(VGA).

• Change hardware configuration.

• Reinstall Trident OS/2 Display Drivers.
You 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.

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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 73

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.

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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. T ype in: SVM [mode number]<ENTER>.

Chapter 4 SVGA Setup 75

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:

ResolutionResolution

Resolution

ResolutionResolution

640X400 7 0 70 7 0 7 0 70 70 70 70
640x480 60 60 7 5 85 95 95 9 5 95
800x600 56 60 7 5 75 85 85 9 5 95
1024x768 87 i 87i 60 70 7 5 85 95 95
1280x1024 8 7i 87i 87i 8 7i 60 6 0 6 0 60
1600x1200 8 7i 87i 87i 8 7i 87 i 87 i 8 7i 8 7i

GroupGroup

Group

GroupGroup

00

0

00

11

22

33

44

1

2

11

3

22

33

55

4

5

44

55

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.

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77

6

7

66

77

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 77

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.

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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-490.

• AutoCAD • Autoshade

• VersaCAD • GEM Desktop

• Lotus • M S Windows

• MS Word • OS/2 Presentation

Manager

• Symphony • Ventura

• WordPerfect • SC O

• Quattro Pro • VESA BIOS Extension

(for VESA

standard SVGA drivers)

TM

Chapter 4 SVGA Setup 79

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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 81

DOS Demo Program

#include<stdio.h> #include<dos.h> #include<conio> #include
<time.h> #include<graphics.h> void mydelay(void);
/* MAIN PROGRAM */ void main (void) {
unsigned int dog=0

char inkey;
clrscr();
gotoxy(15, 6);printf("AAEON TECHNOLOGY, INC.");
gotoxy(15, 7);printf("WATCHDOG TIMER TEST & DEMO
PROGRAM");
gotoxy(15, 9);printf("Please setup watchdog delay
time:(2 Sec-30 Sec)");
/* Set watchdog timer time-out interval */
scanf("%2d",&dog); /* Input watchdog timer time­out interval (Sec) */
dog=dog/2; /* Convert time-out interval
to designated Hex */
dog=15-dog;
outportb (0x443,dog); /* Enable watchdog timer */
/* Setup screen display format */
gotoxy(15,11);printf("Now enable watchdog!");
gotoxy(15,12);printf("You can put keyboard reset or
disable watchdog.");
gotoxy(15,13);printf(" [1]. Reset watchdog.");
gotoxy(15,14);printf(" [2]. Disable watchdog.");
gotoxy(15,15);printf(" [3]. Return to O.S.");
/* Read key pressed */
while(1){

if(kbhit()){

}

run_time=0;

inkey=getch();
switch(inkey){

case '1': /* Reset Watchdog timer */

gotoxy(15,11);printf("Now enable
watchdog timer!");
outportb(0x443,dog);
run_time=0;
break;

case '2': /* Disable Watchdog timer */

gotoxy(15,12);printf("Now
disable watchdog timer!");
outportb (0x80,dog);
return;

default : break;

}

82 SBC-490 User's Manual

mydelay();
run_time=run_time+1;

/* Display time elapsed */
gotoxy(45,11);printf(%2d.%1d sec",run_time/

}
}
/* USER FUNCTION LIBRARY */ void mydelay(void) /*
Delay program: */ /* Delay 109.89ms (18.2Hz*2) */{

}

10,run_time%10);

clock_t start,end;
start=clock();
end=start;
while((end-start)<2){
end=clock();
}

Appendix A Watchdog Timer Demo Program 83

84 SBC-490 User's Manual