AOpen AP43 AP43 User's guide

AP43

User’s Guide

Copyright

ii

Copyright  1995 by this company. All rights reserved. No part of
this publication may be reproduced, transmitted, transcribed, stored in
a retrieval system, or translated into any language or computer
language, in any form or by any means, electronic, mechanical,
magnetic, optical, manual or otherwise, without the prior written
permission of this company.

Disclaimer

iii

This company makes no representations or warranties, either
expressed or implied, with respect to the contents hereof and
specifically disclaims any warranties, merchantability or fitness for any
particular purpose. Any software described in this manual is sold or
licensed "as is". Should the programs prove defective following their
purchase, the buyer (and not this company, its distributor, or its
dealer) assumes the entire cost of all necessary servicing, repair, and
any incidental or consequential damages resulting from any defect in
the software. Further, this company reserves the right to revise this
publication and to make changes from time to time in the contents
hereof without obligation to notify any person of such revision or
changes.

AMI is a registered trademark of American Megatrends Inc.
AMD is a registered trademark of Advanced Micro Devices Inc.
Cyrix is a registered trademark of Cyrix Corporation.
Intel is a registered trademark of Intel Corporation.
PC XT/AT is a registered trademark of International Business Machines Corporation.

Other brand and product names are trademarks and/or registered trademarks of their
respective holders.

FCC Statement

iv

FCC Class B Radio Frequency

Interference Statement

Note:

This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures:

1. Reorient or relocate the receiving antenna.

2. Increase the separation between the equipment and receiver.

3. Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.

4. Consult the dealer or an experienced radio/television technician for
help.

Notice 1:

The changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to operate
the equipment.

Notice 2:

Shielded interface cables, if any, must be used in order to comply with
emission limits.

About this Manual

v

Purpose and Scope

This manual tells how to install and configure the system board.

Organization

This manual consists of three chapters and two apendices:

Chapter 1, Features, covers the specifications, layout, and components of
the system board.

Chapter 2, Hardware Setup, tells how to set the jumpers, upgrade the CPU
and the system memory, install the system board and add expansion cards.

Chapter 3, AMI BIOS, explains the system BIOS and tells how to configure
the system by setting the BIOS parameters.

Appendix A, Jumper Summary, gives you a tabular summary of the jumper
settings discussed in Chapter 2.

Appendix B, SiS Drivers, tells how to install the drivers supported by SiS.

About this Manual

vi

Conventions

The following conventions are used in this manual:

Text entered by user,

default settings

Represent text input by the user,
default settings and recommended
selections

message displayed

Denotes actual messages that appear
on screen

a, e, s, etc

Represent the actual keys that you
have to press on the keyboard.

NOTE

Gives bits and pieces of additional
information related to the current topic.

WARNING

Alerts you to any damage that might
result from doing or not doing specific
actions.

CAUTION

Suggests precautionary measures to
avoid potential hardware or software
problems.

IMPORTANT

Reminds you to take specific action
relevant to the accomplishment of the
procedure at hand.

TIP

Tells how to accomplish a procedure
with minimum steps through little
shortcuts.

Table of Contents

vii

1 Features

Specifications ..................................................... 1-2

Board Layout ...................................................... 1-3

System Board Parts ........................................... 1-4

Microprocessor .......................................... 1-4

ASICs ........................................................ 1-4

AMI BIOS .................................................. 1-4

Expansion Slots ......................................... 1-5

DRAM Sockets .......................................... 1-5

Two-channel PCI Mode 4 IDE ................... 1-5

Super I/O Controller .................................. 1-6

Keyboard Connector ................................. 1-6

SRAM ........................................................ 1-6

Power Management .................................. 1-6

2 Hardware Setup

CPU Options ................................ ...................... 2-1

5V CPU Options ........................................ 2-1

3.45 V CPU Options .................................. 2-2

ESD Precautions ................................................ 2-2

Installing a Microprocessor ................................ 2-3

Upgrading the Microprocessor ........................... 2-4

Jumper Settings ................................................. 2-5

Table of Contents

viii

Changing the CPU Type ............................ 2-7

Setting the Oscillator Frequency ............. 2-13

Setting the Flash ROM Type ................... 2-13

Selecting the ECP DMA Channel ............ 2-14

Enabling the FDC and Super I/O Chip .... 2-14

Selecting the Cache Size ........................ 2-15

Clearing the CMOS ................................. 2-17

Memory Configuration ...................................... 2-17

Installing a SIMM ..................................... 2-18

Removing a SIMM ................................... 2-19

Connectors ....................................................... 2-20

Multifunction Connector ........................... 2-20

Keyboard Connector ............................... 2-22

Power Connector ..................................... 2-23

Break/Suspend Connector ...................... 2-23

Fan Power Connectors ............................ 2-24

External Battery Connector ..................... 2-25

Installation ........................................................ 2-26

Installing the System Board ..................... 2-26

Installing Expansion Boards .................... 2-27

Table of Contents

ix

3 AMI BIOS

AMI BIOS Setup Main Menu .............................. 3-1

Standard CMOS Setup ...................................... 3-2

Date/Time .................................................. 3-2

Floppy Drives A and B ............................... 3-3

Hard Disk Drives ........................................ 3-4

Advanced CMOS Setup ..................................... 3-5

Typematic Rate (Chars./Sec.) ................... 3-7

System Keyboard ...................................... 3-7

Primary Display ......................................... 3-7

Above 1 MB Memory Test ......................... 3-8

Memory Test Tick Sound .......................... 3-8

Hit “Del” Message Display ......................... 3-8

Extended BIOS RAM Area ........................ 3-8

Wait for F1 If Any Error.............................. 3-8

System Boot-up Num Lock ........................ 3-9

Numeric Processor Test ............................ 3-9

Floppy Drive Seek at Boot ......................... 3-9

Floppy Drive Swapping .............................. 3-9

System Boot-up Sequence ........................ 3-9

System Boot-up CPU Speed ................... 3-10

Turbo Switch Function ............................. 3-10

Password Checking ................................. 3-10

Table of Contents

x

CPU Selection ......................................... 3-10

Cache ...................................................... 3-10

Shadow C800, D000, D800, 32K ............ 3-12

Video Shadow ......................................... 3-12

Main BIOS Cacheable ............................. 3-12

Cacheable C800, D000, D800, 32 K ....... 3-12

Video Shadow Cacheable ....................... 3-13

Secondary IDE Drives Present ................ 3-13

Primary 1st IDE Block Mode .................... 3-13

Primary 2nd IDE Block Mode .................. 3-13

Secondary 1st IDE Block Mode ............... 3-14

Secondary 2nd IDE Block Mode .............. 3-14

Chipset Setup Mode ................................ 3-15

Chipset Features Setup ................................... 3-15

Memory Speed (DRAM) .......................... 3-17

Cache Speed (SRAM) ............................. 3-17

CPU-to-PCI Memory Post Write Buffer ... 3-18

CPU-to-PCI Memory Burst Write ............. 3-18

DRAM Type (Refresh) ............................. 3-18

Power Management Setup .............................. 3-22

BIOS Power Management Mode ............. 3-22

Advanced Power Management ............... 3-24

Doze Timer .............................................. 3-24

Table of Contents

xi

Standby Timer ......................................... 3-24

Suspend Timer ........................................ 3-24

Wake-up Events ...................................... 3-25

Monitor Type ........................................... 3-25

Display Off After ...................................... 3-25

HDD Off After .......................................... 3-25

Deturbo After ........................................... 3-26

Break Switch ........................................... 3-26

Peripheral Setup .............................................. 3-26

Programming Mode ................................. 3-27

Onboard FDC .......................................... 3-27

Serial Port 1 ............................................. 3-27

Serial Port 2 ............................................. 3-27

Parallel Port ............................................. 3-28

IRQ Active ............................................... 3-28

Parallel Port Mode ................................... 3-28

Parallel Port Extended Mode ................... 3-28

Utility Setup ...................................................... 3-29

Detect Master and Detect Slave .............. 3-29

Color Set ................................................. 3-30

Default Setup ................................................... 3-30

Original .................................................... 3-30

Optimal .................................................... 3-31

Table of Contents

xii

Fail-safe ................................................... 3-31

Security Setup .................................................. 3-32

Password ................................................. 3-32

Anti-virus ................................................. 3-34

Exit Setup ......................................................... 3-35

NCR SCSI BIOS and Drivers ........................... 3-36

Appendix A Jumper Summary

Appendix B SiS Drivers

Chapter

Features 1

User’s Guide 1-1

The AP43 is a 486-based system board that utilizes the PCI/ISA
architecture. It supports the 486SX, DX, DX2, and DX4 series
microprocessors. It has four ISA-AT and three PCI slots for future
expansion. The system memory is expandable to 128 MB by adding
single in-line memory modules (SIMMs). The second-level cache is
upgradable to 512 KB and supports both the write-back and write­through modes.

Two SiS application-specific integrated circuit (ASIC) chipsets with
built-in two-channel, PCI mode 4 IDE controller and a super I/O
controller are also incorporated in the design to further enhance
system performance. The board measures 220 mm x 250 mm (baby­AT size).

Features

1-2 User’s Guide

Specifications

Microprocessor

5V CPUs

Intel SL-enhanced
Intel SX/DX/DX2
AMD DX/DX2
Cyrix DX/DX2
Intel P24D
Intel P24T

3.45V CPUs
Intel DX4
AMD DX2
AMD DX4/DX4-S/Am5x86
Cyrix DX2/DX4/5X86
TI DX2/DX4

Maximum Memory

128 MB

SIMM Sockets

Four 72-pin, 32-bit

ASIC Chips

SiS85C496
SiS85C497

Bus Architecture

ISA, PCI

Expansion Slots

Four ISA slots, Three PCI slots

Ports

One parallel port (ECP/EPP)
Two serial ports (UART 16C550)
Two-channel PCI mode 4 IDE
One floppy-disk connector
(1.2/1.44/2.88 MB)

Onboard Battery

CR2032 3.0V lithium battery

RTC

146818 built-in 85C497

Secondary Cache

128 KB/256 KB/512 KB

BIOS

AMI Plug-and-Play WinBIOS

Board Size

220 mm x 250 mm (baby-AT)

Features

User’s Guide 1-3

Board Layout

1. Power connector 13. External battery connector

2. Printer connector 14. Battery

3. SIMM sockets 15. SiS 85C497 ASIC

4. IDE1 connector 16. ISA slots

5. IDE2 connector 17. AMI BIOS

6. SiS 85C496 ASIC 18. PCI slots

7. Second-level cache 19. Keyboard controller

8. CPU socket 20. Super I/O chip

9. Two-pin fan connector 21. FDC connector

10. Four-pin fan connector 22. COM2 connector

11. HDD LED connector 23. COM1 connector

12. Multifunction connector 24. AT-keyboard connector

Features

1-4 User’s Guide

System Board Parts

Microprocessor

The AP43 system board supports the Intel SL-enhanced, Intel
486SX/DX/DX2/DX4, AMD 486DX/DX2/DX4/DX4-S/Am5x86, Cyrix
Cx486DX/DX2/DX4/5X86 and TI 486DX2/DX4 series
microprocessors. Chapter 2 tells how to upgrade the processor.

ASICs

The two ASICs onboard are the SiS85C496 and SiS85C497. The
SiS85C496 acts as the PCI and CPU memory controller (PCM). It
integrates the host bridge, the cache and main memory DRAM
controller, the PCI bridge, the built-in IDE controller and the Fast Slow
Link (FS-Link) bus.

The SiS85C497 is the AT-bus controller and megacell (ATM)
component that acts as an interface the PCI/CPU/memory bus and
the ISA bus.

AMI BIOS

The AMI BIOS (basic input-output system) resides in the flash ROM
chip. This contains the program that performs the power-on self-tests
(POST) upon booting. During POST, this program activates the
peripheral devices, tests onboard memory, and prepares the system
for operation. Chapter 3 gives more information on the AMI BIOS.

Features

User’s Guide 1-5

Expansion Slots

The board expansion slots consist of four ISA-AT and three PCI slots.
These expansion slots are the parallel bars on the system board.
There are rows of golden pins inside each slot that serve as a clutch
to secure the contacts of expansion boards. Chapter 2 tells how to
install expansion boards.

DRAM Sockets

The system board has four 72-pin DRAM sockets that expand system
memory from 1 MB to a maximum of 128 MB. These sockets accept
single- and double-density SIMMs. Chapter 2 tells how to install
memory modules.

Two-channel PCI Mode 4 IDE

The board utilizes the enhanced-integrated drive electronics (E-IDE)
interface that improves the data transfer rate. It also allows the
system to support four E-IDE devices, including hard disks with more
than 528-MB capacity. This feature offers users increased data
storage capacity.

Features

1-6 User’s Guide

Super I/O Controller

The onboard super I/O controller chip supports two UART
16450/16550-compatible serial ports and a parallel port (SPP, EPP,
ECP)1. It also accommodates 1.2-/1.44-/2.88-MB disk drives allowing
full-range access to 5.25-inch drives with 360-KB or 1.2-MB format
and 3.5-inch drives with 720-KB, 1.44-MB or 2.88-MB format.

Keyboard Connector

The keyboard connector at the rear of the system board allows you to
connect any AT-compatible keyboard. See Chapter 2 for directions
on how to install a keyboard.

SRAM

The system board supports 128-KB, 256-KB and 512-KB second­level, write-back and write-through cache.

Power Management

The AP43 conforms to the power-saving standards of the U.S.
Environmental Protection Agency (EPA) Energy Star program. The
system board features four power-saving modes that reduce power
consumption. For more information on the power-saving modes, see
Chapter 3.

1

SPP: Standard Parallel Port

EPP: Enhanced Parallel Port (IEEE 1284 compliant)
ECP: Extended Capabilities Port (IEEE 1284 compliant)

Chapter

Hardware Setup 2

User’s Guide 2-1

This chapter discusses the CPU options, tells how to set jumpers,
upgrade system memory, add expansion boards, and install the
system board.

Install the CPU, memory, and set the jumpers before you install the
board inside a housing. You may add the other components after
installing the board. Read this chapter to learn about the components
before you install them.

CPU Options

The system board supports both 5V and 3.45V CPUs. The following
tables list the CPU options for this system board.

5V CPU Options

5V CPU Type

Speed (MHz)

Intel series
(SL-enhanced)

486SX
486DX
486DX2
P24D
P24T

25/33
33
50/66
50/66
63/83

AMD series

486DX
486DX2

33/40
50/66/80

Cyrix

486DX
486DX2

33/40
50/66

Hardware Setup

2-2 User’s Guide

3.45 V CPU Options

3.45V CPU Type

Speed (MHz)

Intel

486DX4

75/100

AMD series

486DX2
486DX4
Am5x86

66/80
100/120
133

Cyrix series

486DX2
486DX4
5X86

V50/V66/V80
100
100/120

TI series

486DX2
486DX4

66/80
100

ESD Precautions

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

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

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

Hardware Setup

User’s Guide 2-3

Installing a Microprocessor

The motherboard has a zero-insertion force microprocessor socket
that allows you to install a CPU without using any tools.

Follow these steps to install a CPU in a ZIF-type upgrade socket:

Make sure that the system power is OFF
before installing any component.

1. Pull up the socket lever.

2. Insert the CPU with the attached heatsink and fan. Make sure
that pin 1 of the CPU aligns with hole 1 of the socket. The hole
on the upper right corner of the socket indicates pin 1.

Pin 1
Indicator

Hole 1 Indicator

CPU SOCKET

Hardware Setup

2-4 User’s Guide

3. Pull down the socket lever to lock the CPU into the socket.

4. Plug the fan cable into the onboard fan connector.

5. Set the jumpers accordingly. See the following sections for the
correct jumper settings.

Upgrading the Microprocessor

Follow these steps to upgrade the CPU:

1. Turn off the system power and remove the housing cover.

2. Locate the CPU socket on the system board.

3. Pull up the socket lever.

4. Remove the installed CPU.

5. Install the upgrade CPU. Refer to the section Installing a
Microprocessor for instructions on how to install a CPU.

Hardware Setup

User’s Guide 2-5

Jumper Settings

You have to change the jumper settings when you reconfigure the
system. This section tells how to set the jumpers. The figure below
shows the jumper locations.

Hardware Setup

2-6 User’s Guide

Set a jumper switch as follows:

 To close a jumper, insert the plastic jumper cap over two pins of

a jumper.

 To open a jumper, remove the jumper cap.

The following conventions are used to represent the proper jumper
settings:

When you open a jumper, attach the
plastic jumper cap to one of the pins so
you won't lose it.

Open

Closed (2-3 position)

Hardware Setup

User’s Guide 2-7

Changing the CPU Type

You must set jumpers JP6 to JP10, JP12*, JP13 to JP20 and JP29
according to the CPU type. The board supports both 5V and 3.45V
CPUs. Make sure that you know your CPU type and its operating
voltage before you begin. Improper setting of jumpers may result in
system failure.

5V CPU Type

For Intel processors, you must determine if your CPU is SL-enhanced
or not. To check, simply look for the "&" symbol in the third row on the
lower label of the CPU.

The P24D processor looks very similar to an Intel SL-enhanced CPU

except for the letter “W” in the third row on the lower label of the CPU.

The letter “W” indicates that the CPU supports the write-back mode.

The following figure shows how to determine an Intel SL-enhanced
CPU and a P24D CPU.

* Set JP12 only if the CPU in use is a 3.45V CPU. Otherwise, the jumper remains

open.

SL-ENHANCED
INDICATOR

WRITE-BACK MODE
INDICATOR

Hardware Setup

2-8 User’s Guide

5V CPU TYPE JUMPER SETTINGS

JP6

JP7

JP8

JP9

JP10

JP13

JP14

JP15

JP16

JP17

JP18

JP19

JP20

JP29

Hardware Setup

User’s Guide 2-9

3.45V CPU Type

INTELDX4 CPUs

You must be able to determine your IntelDX4 CPU type before you set
the jumpers. Improper setting may result to system malfunction.

There are two types of 3.45V IntelDX4 CPUs: one with write-through
mode support while the other is with write-back mode support. To
determine an IntelDX4 CPU with write-back internal mode, look for

the letter “W” in the third row on the lower label of the CPU. The letter

“W” indicates write-back mode. An IntelDX4 CPU with write-through

internal mode does not have this indication. See the following figure.

Hardware Setup

2-10 User’s Guide

AMD DX4 CPUs

The 3.45V AMD DX4 processors come in three types: AMD DX4
(V8T), AMD DX4-S(SV8T) and AMD DX4-S(SV8B). The AMD DX4
(V8T) is a non-SL-enhanced CPU that supports write-through internal
cache mode. The AMD DX4-S(SV8T) is an SL-enhanced CPU that
supports write-through internal mode. The AMD DX4-S(SV8B) is also
an SL-enhanced CPU but with write-back internal cache mode
support.

To determine your AMD CPU type, check the second row of your
CPU label. An SL-enhanced AMD DX4 CPU has a letter “S” following
the “AMD DX4-100” label. The last letter (i.e., either “B” or “T”)
indicates the CPU cache mode supported. See the following figure.

AMD 486DX4 (V8T)

(w/out SMM support)

AMD 486DX4-S

(SV8T)

AMD 486DX4-S

(SV8B)

“T” indicates write-through “S”: SL-enhanced “S”: SL-enhanced
mode “T” indicates “B” indicates
write-through mode write-back mode

Hardware Setup

User’s Guide 2-11

CYRIX DX4 CPUS

There are two types of Cyrix DX4 CPUs: Cyrix DX4 with iDX4 pinout
and Cyrix DX4 with M7 pinout.

To determine the Cyrix DX4 CPU pinout, check the CPU label. A

Cyrix DX4 with iDX4 pinout has a “DX4 P/O” indication on the second

row of the lower CPU label. A Cyrix DX4 with M7 pinout does not
have this indication and the lower CPU label has only two rows. See
the figure below.

iDX4
pinout
indication

iDX4 Pinout M7 Pinout

Hardware Setup

2-12 User’s Guide

3.45V CPU TYPE JUMPER SETTINGS

JP6

JP7

JP8

JP9

JP10

JP12

JP13

JP14

JP15

JP16

JP17

JP18

JP19

JP20

JP29

Hardware Setup

User’s Guide 2-13

Setting the Oscillator Frequency

You must reset jumpers JP25, JP26 and JP27 if you change the
oscillator frequency.

Setting the Flash ROM Type

Set jumper JP24 according to the type of Flash ROM in use. If the
system uses a 5V EEPROM (or 5V Flash ROM) instead of a 12V
Flash ROM, you must set the jumper to 2-3. The default setting is
2-3.

JP24

12V Flash ROM

5V EEPROM or Flash ROM

25 MHz 33 MHz 40 MHz

JP25

JP26

JP27

Hardware Setup

2-14 User’s Guide

Selecting the ECP DMA Channel

The jumpers JP22 and JP23 are used to select the DMA channel for
ECP function. The default channel is DMA 1.

Enabling the FDC and Super I/O Chip

The jumper JP21 allows you to enable or disable the floppy disk
controller (FDC) and the super I/O chip. The onboard I/O chip
supports two serial ports, one parallel port and FDD functions. Set
the jumper to 2-3 if you want to use a separate I/O card.

JP21

ENABLED
JP22 JP23

DMA 1

DMA 3
DISABLED

Hardware Setup

User’s Guide 2-15

Selecting the Cache Size

The system board supports 128-KB, 256-KB, and 512-KB, write-back
and write-through second-level cache. See the table below for the
possible cache configurations.

The second-level cache is upgradable from 128 KB to 512 KB. The
system supports both write-back and write-through modes.

Cache

Size

TAG SRAM

(U9)

Data SRAM

Location

128 KB

16 Kb x 8 or
32 Kb x 8

32 Kb x 8 x 4 pcs

Bank 0

256 KB

16 Kb x 8 or
32 Kb x 8

32 Kb x 8 x 8 pcs

Banks 0 and 1

256 KB

16 Kb x 8 or
32 Kb x 8

64 Kb x 8 x 4 pcs

Bank 0

512 KB

32 Kb x 8

64 Kb x 8 x 8 pcs

Banks 0 and 1

512 KB

32 Kb x 8

128 Kb x 8 x 4 pcs

Bank 0

Follow these steps to install SRAMs:

1. Locate the cache sockets on the system board. See the section
Board Layout.

2. Insert the SRAM chip into the socket. Align the straight edge of
the chip with the straight edge of the socket. Also, make sure
that the cut edge of the chip corresponds to the cut edge of the
cache socket. See the figure below.

Always install SRAMs beginning with Bank 0.

Hardware Setup

2-16 User’s Guide

Press the SRAM chip gently but firmly into
place. Be careful not to bend the pins.

When upgrading the cache, install the SRAM chips and set jumpers
JP1, JP2, JP3, JP4 and JP5 accordingly. See the following figure.

JP1

JP2

JP3

JP4

JP5

128 KB 256 KB 256 KB 512 KB 512 KB
32 Kb x 4 32 Kb x 8 64 Kb x 4 128 Kb x 4 64 Kb x 8

Hardware Setup

User’s Guide 2-17

Clearing the CMOS

The 3-pin jumper JP28 clears the values in the CMOS. You need to
clear the CMOS if you forget your system password. To do this, shut
off the system power and short pins 2-3 of JP28 for a few seconds.
Reset the jumper back to the normal setting by closing pins
1-2 with a jumper cap. Enter Setup to specify a new password.

Memory Configuration

The system memory is upgradable from 1 MB to 128 MB. The four
72-pin SIMM sockets accommodate 1-, 4-, 16- and 64-MB single­density SIMMs, and 2-, 8- and 32-MB double-density SIMMs with
70/60-ns DRAM speed.

The table below lists the SIMM types and their corresponding
capacities.

SIMM Type

Capacity

256 Kb x 32/36

1 MB

512 Kb x 32/36

2 MB

1 Mb x 32/36

4 MB

2 Mb x 32/36

8 MB

4 Mb x 32/36

16 MB

8 Mb x 32/36

32 MB

16 Mb x 32/36

64 MB

NORMAL

JP28
CLEAR CMOS

Hardware Setup

2-18 User’s Guide

The SIMM sockets accept any DRAM
combinations that satisfy the 128 MB
maximum memory.

Installing a SIMM

Observe the ESD precautions when
installing components.

Follow these steps to install a SIMM:

1. Slip a SIMM at a 45o angle into a socket with the component side
facing down.

Be careful when inserting or removing
SIMMs. Forcing a SIMM in or out of a
socket can damage the socket or the
SIMM (or both).

2. Gently push the SIMM up until the pegs of the socket slip into the
holes on the SIMM and the holding clips lock the SIMM into a
vertical position.

The SIMM should be at a 90o angle when
installed.

Hardware Setup

User’s Guide 2-19

Removing a SIMM

1. Press the holding clips on both sides of the SIMM outward to
release it.

2. Press the SIMM downward to about a 45o angle.

3. Gently pull the SIMM out of the socket.

Hardware Setup

2-20 User’s Guide

Connectors

Multifunction Connector

This 20-pin connector is marked J7 on the system board. It supports
a number of system functions: LED, turbo, reset, keylock, and
speaker. Attach the front panel connectors to the corresponding pins
as in the illustration below.

( Turbo Switch ) ( Turbo LED )

Break Switch Green Mode LEDReset

Speaker Power LED Keylock

Some housings have a five-pin connector for the keylock and power
LED. See the following illustration.

Reset Turbo Switch Turbo LED
(Green Mode LED)

Speaker Power LED Keylock

Hardware Setup

User’s Guide 2-21

Speaker Keylock & Power LED

Break Switch Green Mode LED

( Turbo Switch ) ( Turbo LED )

Reset

Other housings may have a 12-pin connector. If your housing has this
type of connector, plug it into J7 as shown in the following figure.
Make sure that the red wire of the connector connects to pin 11.

( Turbo Switch )

Break Switch

Ground

VCC

Ground

Ground

Keylock

Reset

Res-VCC

Speaker

Reset Turbo Switch Turbo LED
(Green Mode LED)

Speaker Keylock and Power LED

Turbo Switch

Hardware Setup

2-22 User’s Guide

Turbo LED/Green Mode LED

You can use the J7 LED connector either for the Turbo function or for
the Green Mode function. However, you cannot use both functions at
the same time. To use the LED for turbo, you need to connect the
turbo switch into the CN5 multifunction connector. Take note that in
turbo mode, the LED is on. In deturbo mode, the LED is off.

To use the LED for the green function, you need to connect the break
switch into JP30 (i.e, the break switch connector). The green mode
LED is always on regardless of the system mode.

Keyboard Connector

The keyboard connector is a 5-pin, AT-compatible connector. The
following figure shows how to connect a keyboard.

Hardware Setup

User’s Guide 2-23

Power Connector

A standard power supply has two cables with six wires each. Attach
these cables to the power connector on the board in such a way that
all the black wires are in the center.

Break/Suspend Connector

The Break/Suspend connector is a 3-pin connector labeled JP30 on
the system board. Pressing the break switch on the front bezel forces
the system to enter the suspend mode. Pressing any key on the
keyboard returns the system to normal mode.

You cannot use the break switch and the
turbo switch at the same time.

Hardware Setup

2-24 User’s Guide

Fan Power Connectors

The board comes with one 2-pin and one 4-pin fan power connector.

The 2-pin fan power connector is marked CN3 on the system board.
To connect, plug the connector to its corresponding pin as shown in
the following figure.

To connect the 4-pin fan power connector, simply plug it into the 4-pin
connector marked CN4 on the system board.

2-pin fan power connector (J2)

GND

+12V

+5V +12V
GND

CN3

CN4

Hardware Setup

User’s Guide 2-25

External Battery Connector

The 4-pin external battery connector is marked J8 on the system
board. This is used to connect an external battery in case your
system board does not have an onboard battery or the 146818
RTC/battery.

To connect an external battery, simply plug the battery connector into
J8. Make sure that the positive end of the connector corresponds to
pin 1. See the illustration below.

J8

1

1

Hardware Setup

2-26 User’s Guide

Installation

The baby-AT size of the AP43 system board easily fits most housings.
It has mounting holes that conform to the standard system housing.

Some housings may differ slightly in design, requiring additional steps
to install the board. Read the documentation that comes with the
housing.

Make sure that you have already installed
the system board components like the
CPU and memory, and have set the
appropriate jumpers before you proceed.

Installing the System Board

1. Open the system housing.

2. Use at least two screws that come with the housing to secure the
board.

3. Attach the power supply cables to the power connector and the
front panel connectors to the multifunction connector. See the
section Connectors.

4. Install any additional components that you have not yet installed.

Hardware Setup

User’s Guide 2-27

Installing Expansion Boards

Install any expansion boards after you have secured the system board
in the housing.

Follow these steps to install an expansion board.

1. Observe the ESD precautions before removing the expansion
card from its protective packaging.

2. Remove the bracket opposite the slot that you want to use. Save
the cover for future use. Save the screw to secure the expansion
board.

3. Remove the board from its protective packaging.

4. Gently insert the golden edge of the board into the slot until it fits
into place.

5. Secure the board bracket with the screw.

Golden Edge

PCI Slot

Golden
Edge

ISA Slot

Chapter

AMI BIOS 3

User’s Guide 3-1

AMI BIOS Setup Main Menu

The AMI BIOS Setup Main Menu appears below. Press c to enter the
system menu.

The AMI BIOS is in Windows form. You can use either the keyboard
or a mouse to move between the items. To select among the Setup
groups, use v to highlight the selected group or simply click on the
icon of the selected Setup menu.

To select among the options, you can either use the arrow keys to
move the highlight bar or simply click on the icon of the desired
option.

After selecting, press e or double-click on the icon to open the menu.

AMI BIOS

3-2 User’s Guide

Standard CMOS Setup

Highlight Setup using v or simply click on the Setup icon. Select

Standard to input configuration values such as the date, time, and

disk types. The Standard CMOS Setup pop-up window appears
below:

Date/Time

To set the date and time, highlight Date/Time and press e or
double-click on the Date/Time icon. The following screen appears:

AMI BIOS

User’s Guide 3-3

Use the arrow keys to move among the items. Press + and - or click
the + and - icons to set the current date and time. Close the window
by pressing e or double-clicking the Control menu box in the upper­left corner of the window.

Floppy Drives A and B

To configure the floppy drive, select Floppy A. The following
values appear on the screen:

After selecting the proper setting, press e or double-click the Control
menu box to close the window.

Select Floppy B and follow the same procedure to configure the
second floppy drive, if present.

AMI BIOS

3-4 User’s Guide

Hard Disk Drives

Select Master Disk to configure the first hard disk. The following
values appear on the screen:

Press } to move to the next page. Use w or y to highlight the selected
parameter. If you cannot find your hard disk drive type on the list,
select User and enter the disk parameters. You can also select
Utility Setup. This automatically configures your hard disk. Refer to
the section Utility Setup for more information.

Select ESDI or SCSI, depending the device installed.

If you have two hard disks installed, select Slave Disk and follow
the same procedure to configure the second hard disk.

AMI BIOS

User’s Guide 3-5

Advanced CMOS Setup

The window below appears if you select Advanced from the main
menu.

The screen above does not show all the parameters of the Advanced
Configuration menu. Use w or y to highlight the desired parameter.
Press } to view the rest of the parameters. The following screens
appear:

AMI BIOS

3-6 User’s Guide

AMI BIOS

User’s Guide 3-7

Typematic Rate (Chars./Sec.)

This parameter determines the typematic rate. The typematic rate
settings are 15, 20, 30, and Disabled. The default setting is 30.
Set it to Disabled to disregard the rate setting.

System Keyboard

Set this parameter to Present if there is a keyboard connected to
the system. However, some servers may not have keyboards.
Select Absent if there is no keyboard present.

Primary Display

This function detects the type of VGA in use. The settings are
VGA/EGA, CGA 40 x 25, CGA 80 x 25, Mono, and Absent. The
default setting is VGA/EGA.

AMI BIOS

3-8 User’s Guide

Above 1 MB Memory Test

This parameter allows your system to check all available memory.
Therefore, setting this parameter to Enabled slows down the power­on self-test. The default setting is Disabled.

Memory Test Tick Sound

Enabling this parameter lets you hear the tick sound during the
memory test. Disable the parameter to bypass the function.

Hit “Del” Message Display

Disabling this option prevents the Hit <Del> if you want Setup
message from appearing when the system boots. The settings are
Enabled or Disabled.

Extended BIOS RAM Area

This function allows you to relocate the BIOS from ROM to RAM.
Relocating to RAM enhances system performance as information
access is faster than ROM. The parameter settings are 0:300 and
DOS 1K. The default address is 0:300.

Wait for F1 If Any Error

When enabled, the BIOS waits for the end user to press l before
continuing. If disabled, the BIOS continues the boot process without
waiting for l to be pressed.

AMI BIOS

User’s Guide 3-9

System Boot-up Num Lock

Setting this parameter to On enables the numeric function of the
numeric keypad. Set this parameter to Off to disregard the function.
Disabling the numeric function allows you to use the numeric keypad
for cursor control. The default setting is On.

Numeric Processor Test

This parameter is non-configurable and auto-detected by the system.
If the CPU in use is a DX CPU, this parameter is automatically set to

Enabled. However, for the SX CPU, the setting is changed to
Disabled. This is because the SX CPU does not have an

integral numeric coprocessor.

Floppy Drive Seek at Boot

When enabled, the BIOS detects whether there is a floppy disk drive
installed. Disable the parameter to bypass the function.

Floppy Drive Swapping

This parameter allows you to swap floppy drives. For example, if you
have two floppy drives (A and B), you can assign the first drive as
drive B and the second drive as drive A or vice-versa. Disable the
parameter to bypass the function. The default is Disabled.

System Boot-up Sequence

The settings are C:,A: and A:,C: to specify the system search
sequence. The default setting is A:,C:.

AMI BIOS

3-10 User’s Guide

System Boot-up CPU Speed

Set the system speed to High or Low with this parameter. High is
the default setting.

Turbo Switch Function

This parameter lets you enable or disable the turbo switch function.
The default setting is Enabled.

Password Checking

The settings are Setup and Always. The Setup setting allows the
system to boot and use the password to protect the Setup Utility
Configuration settings from being tampered with. The Always setting
requires you to enter the password everytime you boot the system.
The default setting is Setup.

CPU Selection

The available settings for this parameter are Auto, Intel, AMD and
Cyrix. Check your CPU before setting this parameter. Otherwise,
select Auto to automatically configure the CPU. The default setting
is Auto.

Cache

External Cache

This parameter lets you enable or disable the secondary cache. The
default setting is Enabled. Leave it enabled unless you are
troubleshooting a problem.

AMI BIOS

User’s Guide 3-11

External Cache Mode

The external cache can be set either to Write-back or Write-through
modes. The Write-back mode is faster than the Write-through mode.
The default is Write-back.

Cache Tag Width

This parameter lets you set the cache tag width. The available
settings are 8-bit and 7-bit. The default setting is 8-bit.

Internal Cache

This parameter lets you enable or disable the internal cache. The
default setting is Enabled. Leave it enabled unless you are
troubleshooting a problem.

Internal Cache Mode

The internal cache is normally set to Write-through. However, if
you are using a Cyrix DX4 or an Intel P24D CPU, you must change
the setting to Write-back for better performance.

CPU Burst Write

This parameter enables or disables the CPU cache burst-write mode
for M7, P24D and P24T. The default setting is Disabled.

AMI BIOS

3-12 User’s Guide

Shadow C800, D000, D800, 32K

This function is for shadowing other expansion card ROMs. The
default setting for these areas is Disabled. If you have other
expansion cards with ROMs on them, you need to know the specific
addresses that the ROMs use to shadow them. Enable all the ROM
Shadow settings if you don't know the addresses. This ensures the
shadowing of any present ROMs.

The F000 and E000 addresses are
exclusively shadowed for BIOS.

Video Shadow

The default setting for this parameter is Enabled. This copies the
video display card BIOS into the system DRAM to improve system
performance.

Main BIOS Cacheable

The default setting for this parameter is Enabled. This enhances
the system performance. Disabling the parameter prevents the
system BIOS from being cached.

Cacheable C800, D000, D800, 32 K

The default setting for these parameters is Enabled. This
enhances the system performance. The Disabled setting prevents
these addresses from being cached.

AMI BIOS

User’s Guide 3-13

Video Shadow Cacheable

The default setting for this parameter is Enabled. This copies the
video ROM area to RAM and therefore, enhances the system
performance. Disabling the parameter prevents the video BIOS from
being cached.

Secondary IDE Drives Present

This parameter allows you to connect a secondary IDE device to your
system. The default setting is None.

Primary 1st IDE Block Mode

This function enhances the performance of the primary IDE hard disk
connected to your IDE 1 connector. This parameter is normally set to

Disabled. If enabled, it allows data transfer in block (multiple

sectors) by increasing the data transfer rate. Disable the parameter if
your hard disk does not support this feature.

Primary 2nd IDE Block Mode

This function enhances the performance of the secondary IDE hard
disk connected to your IDE 1 connector. This parameter is normally
set to Disabled. If enabled, it allows data transfer in block
(multiple sectors) by increasing the data transfer rate. Disable the
parameter if your hard disk does not support this feature.

AMI BIOS

3-14 User’s Guide

Secondary 1st IDE Block Mode

This function enhances the performance of the primary IDE hard disk
connected to your IDE 2 connector. This parameter is normally set to

Disabled. If enabled, it allows data transfer in block (multiple

sectors) by increasing the data transfer rate. Disable the parameter if
your hard disk does not support this feature.

Secondary 2nd IDE Block Mode

This function enhances the performance of the secondary IDE hard
disk connected to your IDE 2 connector. This parameter is normally
set to Disabled. If enabled, it allows data transfer in block
(multiple sectors) by increasing the data transfer rate. Disable the
parameter if your hard disk does not support this feature.

LBA Mode

This enhanced IDE feature allows you to use a hard disk with a
capacity greater than 528 MB. This is made possible through the
Logical Block Address (LBA) mode translation. Set this parameter to

Enabled if your hard disk supports this feature. The default setting

is Disabled.

32-bit Transfer

Normally, this parameter is set to Disabled. Enabling this function
improves disk performance by increasing the data transfer rate from
16-bit to 32-bit.

AMI BIOS

User’s Guide 3-15

Chipset Setup Mode

This function allows you to change the Chipset Setup DRAM and
SRAM parameters according to the end-user type. The available
settings are End-user and Engineer. We recommend that you set this
parameter to End-user. See the following section for more details
about the Chipset Features Setup.

Chipset Features Setup

The Chipset Features Setup controls the board's chipset settings.
The controls for this menu are the same as for the previous screen.

The Chipset Setup DRAM and SRAM parameters differ depending on
the Chipset Setup Mode setting in the Advanced CMOS Setup. The
following screens appear if you select the Chipset option from the
Setup menu and if the Chipset Setup Mode parameter setting is

End-user:

AMI BIOS

3-16 User’s Guide

AMI BIOS

User’s Guide 3-17

The screen below appears if your Chipset Setup Mode parameter
setting is Engineer. Take note of the new parameters that
replaced the Memory Speed (DRAM) and the Cache Speed (SRAM)
parameters.

See screens 2, 3 and 4 for the rest of the parameters.

This manual describes only the End-user
setting parameters.

Memory Speed (DRAM)

This parameter lets you set the DRAM speed. The supported DRAM
speeds are 70 ns and 60 ns. The default setting is 70 ns.

Cache Speed (SRAM)

This parameter lets you set the SRAM cache speed. The supported
DRAM speeds are 15 ns and 20 ns. The default setting is 20 ns.

AMI BIOS

3-18 User’s Guide

CPU-to-PCI Memory Post Write Buffer

Enable this parameter to control the posting of the CPU-to-memory
write data in the posting buffers. Disable the parameter to deactivate
the buffering function.

CPU-to-PCI Memory Burst Write

Enabling this parameter allows the translation of the host cycles into
memory-burst cycles and controls the memory burst-write cycles.
Disabling the function deactivates the memory burst writes.

DRAM Type (Refresh)

This parameter lets you select the DRAM type that you wish to
support. The options are Normal and Low Power. The low-power
DRAMs are special-type DRAMs. The default setting is Normal.

Motherboard IDE

To take advantage of the IDE features of the motherboard, you need
to set this parameter to Enabled. Disable the parameter to bypass
the feature.

Primary Master PIO Mode

If this enhanced IDE parameter is set to Auto, it automatically
detects the PIO mode (mode 0, 1, 2, 3, 4) and sets the interface
timing of the master drive connected to the primary IDE connector. If
you know your HDD PIO mode, you can set this parameter manually.
The default setting is Auto.

AMI BIOS

User’s Guide 3-19

We recommend that you set this
parameter to Auto. If you prefer to set
the PIO mode manually, make sure that
you know your HDD type.

Primary Slave PIO Mode

If this enhanced IDE parameter is set to Auto, it automatically
detects the PIO mode (mode 0, 1, 2, 3, 4) and sets the interface
timing of the slave drive connected to the primary IDE connector. If
you know your HDD PIO mode, you can set this parameter manually.
The default setting is Auto.

Secondary Master PIO Mode

If this enhanced IDE parameter is set to Auto, it automatically
detects the PIO mode (mode 0, 1, 2, 3, 4) and sets the interface
timing of the master drive connected to the secondary IDE connector.
If you know your HDD PIO mode, you can set this parameter
manually. The default setting is Auto.

Secondary Slave PIO Mode

If this enhanced IDE parameter is set to Auto, it automatically
detects the PIO mode (mode 0, 1, 2, 3, 4) and sets the interface
timing of the slave drive connected to the secondary IDE connector. If
you know your HDD PIO mode, you can set this parameter manually.
The default setting is Auto.

AMI BIOS

3-20 User’s Guide

For the PIO Mode parameters, we
recommend that you select Auto. This
automatically detects the correct PIO
mode of your HDD and prevents
configuration error caused by wrong data
entry.

PCI-IDE Non-compliant Card

This parameter allows you to select your PCI-IDE card slot. The
available selections are Slot 1, Slot 2, Slot 3 and Absent. Select

Absent if you do not have any PCI-IDE cards installed.

Primary PCI-IDE Card Uses

This parameter lets you assign an INT for the IDE device connected
to your primary IDE connector. The settings are INT A, INT B, INT C,
and INT D. If you do not have any PCI-IDE cards installed in your
system, this parameter becomes non-configurable.

Secondary PCI-IDE Card Uses

This parameter lets you assign an INT for the IDE device connected
to your primary IDE connector. The settings are INT A, INT B, INT C,
and INT D. If you do not have any PCI-IDE cards installed in your
system, this parameter becomes non-configurable.

AMI BIOS

User’s Guide 3-21

PCI IRQ Allocation

The settings for this parameter are Auto and Manual. If you select

Auto, it automatically sets the IRQs and INTs for the PCI devices

installed in your system. If you want to configure your PCI device
parameters, select Manual.

PCI Slot 1/2/3 INT Connect

These parameters are configurable only if the PCI IRQ Allocation
parameter is set to Manual. This allows you to set the INT(s) for the
PCI devices. The selections are INT A, INT B, INT C and INT D.
Make sure that you assign a different INT for each PCI device
function.

IRQ CONNECT

This parameter is configurable only if the PCI IRQ Allocation
parameter is set to Manual. This allows you to set an IRQ for each
PCI device installed in your system. The selections are IRQ 3~7,
9~12, 14, and 15. Make sure that you assign a different IRQ for each
PCI device to avoid conflict.

IRQ TRIGGER

This parameter lets you set when to trigger the IRQ, i.e., either at the
Edge or Level of the signal.

ISA IRQ Manual Over Ride Parameters
(IRQ 3, 4, 5, 7, 9, 10, 11, 12, 14 and 15)

These lines allow you to assign the available IRQs to either ISA or
PCI devices.

AMI BIOS

3-22 User’s Guide

Power Management Setup

The screen below appears if you select Power Management from
the main menu. To select, highlight Power Mgmt and press e or
double-click on the Power Management icon.

BIOS Power Management Mode

The settings for this parameter depend on the CPU type in use. If the
CPU in use has SMM feature, the available settings for this parameter
are Enabled and Disabled. Select Enabled to take advantage if the
power-saving feature.

If the CPU in use is a non-SMM type, you need to assign an IRQ for
the power-saving function. The selections are IRQ 11, IRQ 12, IRQ
15 and Disabled. Disable the parameter to bypass the feature.

The default setting for this parameter is Disabled. When disabled,
only the screen above appears on the monitor. When enabled, it
allows you to configure the power-saving feature. The following
screens appear if you enable the BIOS Power Management
parameter. Use w or y to highlight the desired parameter. Press } to
view the remaining parameters.

AMI BIOS

User’s Guide 3-23

AMI BIOS

3-24 User’s Guide

If you are using OS/2, Windows NT, Novell or
UNIX operating systems, you must disable the
power management function.

Advanced Power Management

Set this parameter to Enabled to take full advantage of the power­saving feature. Disable the parameter to bypass the feature.

Doze Timer

This function reduces the CPU clock. Full power returns when an
activity takes place. The available settings are 10 sec, 20 sec, 30
sec, 45 sec, 1 Min, 2 Min, 5 Min, 10 Min, 15 Min, 20 Min, 30 Min, 40
Min and Disabled.

Standby Timer

This function reduces the CPU clock and suspends the video signal.
This activates the power-saving features on your monitor. Full power
returns when an event is detected. The available settings are 10 sec,
20 sec, 30 sec, 45 sec, 1 Min, 2 Min, 5 Min, 10 Min, 15 Min, 20 Min,
30 Min, 40 Min and Disabled.

Suspend Timer

The suspend timer stops the CPU internal clock and suspends the
video signal. Full power returns when activity is detected. The
settings are 10 sec, 20 sec, 30 sec, 45 sec, 1 Min, 2 Min, 5 Min, 10
Min, 15 Min, 20 Min, 30 Min, 40 Min and Disabled. This feature
conserves the most energy.

AMI BIOS

User’s Guide 3-25

Wake-up Events

Enabling these parameters allow your system to monitor the I/O
activities. Any activity detected resets the power-management timers
and resumes the system to normal mode.

You must enable at least one IRQ activity.
Otherwise, the system stays in suspend mode..

Monitor Type

This option lets you set the monitor type. The selections are Green
and Non-Green.

Display Off After

This parameter lets you set the display-off mode. The selections are
Doze, Suspend, Standby and Disabled. Once the system enters the
specified mode, the monitor screen turns blank. Monitors with green
function allows you to save more power since the system shuts down
the VH sync. once it enters the specified power-saving mode.

HDD Off After

This option lets you specify which mode to "spin down" your hard disk.
The disk returns to full speed once the system returns to normal
mode. The settings are Doze, Suspend, Standby and Disabled.

AMI BIOS

3-26 User’s Guide

Deturbo After

This function lets you specify the mode when to release the system
from turbo mode. The settings are Doze, Suspend, Standby and
Disabled.

Break Switch

This option lets you enable or disable the break switch. Enabling this
parameter allows the system to enter suspend mode and return to
normal mode by simply pressing the break switch. However, enabling
the break switch disables your turbo functions. Disable the parameter
to take advantage of the turbo functions.

Peripheral Setup

This screen appears if you select Peripherals or double-click on
the Peripheral Setup icon from the Setup menu. The Peripheral
Setup screen allows you to set up your system peripherals.

AMI BIOS

User’s Guide 3-27

Programming Mode

The settings for this option are Auto and Manual. The Manual setting
allows you to set up the screen items manually. The Auto setting sets
up all the items automatically except for the Parallel Port Mode
parameter.

Onboard FDC

Enabling this function allows you to use the onboard floppy disk
controller (FDC). The default setting is Enabled.

Serial Port 1

This parameter allows you to set the base address of serial port 1.
The available settings are 3F8H, 2F8H, 3E8H, 2E8H and Disabled.
The default setting is 3F8H.

Serial Port 2

This parameter allows you to set the base address of serial port 2.
The available settings are 3F8H, 2F8H, 3E8H, 2E8H and Disabled.
The default setting is 2F8H.

Parallel Port

This parameter allows you to set the base address of the parallel port.
The available settings are 3BCH, 378H, 278H and Disabled. The
default setting is 378H.

AMI BIOS

3-28 User’s Guide

Parallel Port Mode

This option lets you set the parallel port mode. The settings are
Normal, SPP, EPP & SPP, ECP and ECP & EPP. The default setting
is Normal.

Parallel Port Extended Mode

This parameter is configurable only if the Parallel Port Mode
parameter is set to Extended. This enables the extended mode
functions of the parallel port. The selections are EPP, ECP, and ECP
& EPP. The EPP setting allows the parallel port to operate in
bidirectional mode at maximum speed. The ECP setting allows the
parallel port to operate in bidirectional mode and at a speed higher
than maximum data transfer rate. The ECP & EPP setting enables
the parallel port to support both features. The default setting is ECP.

Utility Setup

Detect Master and Detect Slave

These functions allow your system to automatically configure the hard
disk. This screen appears if you select Detect Master or Detect Slave
option.

AMI BIOS

User’s Guide 3-29

After a few seconds, the screen below appears showing your disk
parameters. Select Yes to accept the values.

Color Set

This pop-up window appears if you select Color Set from the
Utility Setup menu.

Color Set lets you specify the color of your windows background. The
selections are LCD, Army, Pastel, and Sky.

AMI BIOS

3-30 User’s Guide

Default Setup

Select this option to automatically set your system configuration
parameters. To select, highlight Default and press e.

Original

This option loads the values that you saved before shutting off the
system. The following prompt appears if you select Original from
the Default Setup menu. Choose Yes to load the original values.

Optimal

Choose this option and the BIOS configures the system using the
best-case values to optimize system performance. However, these
values may not be applicable to your system. If your system does not
boot after choosing this setting, reconfigure it using the Fail-safe
settings. Refer to the following section.

The screen below appears if you choose Optimal from the Default
Setup menu. Select Yes to load the optimum values.

AMI BIOS

User’s Guide 3-31

Fail-safe

Choose this option and the BIOS automatically configures the system
using the most stable settings. These settings are not necessarily the
best settings for system performance, but they are safe and stable
enough to guarantee that your system will boot. This is useful if you
are having problems with your current system configuration and need
to determine the cause.

A prompt appears if you choose Fail-safe from the Default Setup
menu. Select Yes to load the fail-safe values.

AMI BIOS

3-32 User’s Guide

Security Setup

Password

The system password prevents unauthorized use of your computer. If
you enabled the password feature, it is impossible to boot the
computer without entering the password.

To set a password, highlight Password or simply double-click the
Password icon. The following screen appears:

Your password can consist of up to six characters. The password
does not appear on the screen. WinBIOS prompts you to retype the
password. The following screen appears.

AMI BIOS

User’s Guide 3-33

If you forget your password, you must clear the CMOS RAM and
reconfigure the system.

To disable the password, press e when prompted for your password.
Press e again when prompted to retype the password.

AMI BIOS

3-34 User’s Guide

Anti-virus

Set this parameter to Enabled to protect the boot sector and
partition table of your hard disk from virus intrusion. Set it to

Disabled to bypass the feature.

A prompt appears when you select Anti-virus from the Security
Setup menu:

Select Enabled and the screen below appears:

AMI BIOS

User’s Guide 3-35

Exit Setup

To exit Setup, you can either double-click on the Control menu box or
simply press ^. A dialog box appears on the screen.

If you select Save Changes and Exit, BIOS automatically
saves all CMOS values before leaving Setup. Select Do Not

Save Changes and Exit to exit Setup without saving the

CMOS values. Select Continue to return to Setup if you want to
reconfigure your system.

AMI BIOS

3-36 User’s Guide

NCR SCSI BIOS and Drivers

The NCR 53C810 SCSI BIOS resides on the same flash memory chip
as the system BIOS. To use the onboard NCR BIOS, you need to
install an NCR 53C810 SCSI controller card in your system.

All SCSI devices that you install in your system require software
drivers. The NCR SCSI BIOS directly supports SCSI hard disks
under DOS, Windows and OS/2. It also uses DOS-format and SCO
UNIX-format support floppy disk device drivers that come with the
NCR 53C810 SCSI controller card. The DOS-format device drivers
are for SCSI devices used with DOS, Windows NT, Novell NetWare
and OS/2. The SCO UNIX-format device drivers are for SCSI devices
used with SCO UNIX. These drivers offer higher performance than
the direct BIOS support.

To use the device drivers, you must install them in your system hard
disk drive and add them to your system configuration files. For
detailed installation instructions, see the README files that come with
the drivers.

The system board also supports the AMI
Flash Memory Writer Utility that allows you
to upgrade the system BIOS. For more
information on this utility, contact your
local distributor.

Appendix

Jumper Summary A

User’s Guide A-1

CPU Type

5V CPU TYPE

Intel 486SX
SL­enhanced

Intel
486DX/DX2 SL­enhanced

Intel P24D

Intel P24T

JP6

Open

Open

Open

1-2

JP7

2-3

2-3

1-2

1-2

JP8

Open

Open

1-2

Open

JP9

Open

Open

1-2

Open

JP10

1-2

1-2

1-2

1-2

JP13

Open

Open

Open

1-2

JP14

2-3

2-3

2-3

2-3

JP15

2-3

1-2, 3-4

1-2, 3-4

1-2, 3-4

JP16

Open

3-4

3-4

2-3

JP17

3-4

3-4

1-2, 3-4

3-4

JP18

Open

Open

1-2

1-2

JP19

1-2

1-2

2-3

Open

JP20

4-5

4-5

4-5

1-2

JP29

2-3

2-3

2-3

2-3

Intel/AMD

486SX

Intel/AMD

486DX/DX2

Cyrix 486DX/

DX2

JP6

Open

Open

Open

JP7

2-3

2-3

2-3

JP8

Open

Open

Open

JP9

Open

Open

Open

JP10

Open

Open

1-2

JP13

Open

Open

2-3

JP14

Open

Open

1-2

JP15

2-3

1-2, 3-4

1-2, 3-4

JP16

Open

3-4

3-4

JP17

Open

Open

2-3

JP18

Open

Open

2-3

JP19

Open

Open

Open

JP20

Open

Open

2-3

Jumper Summary

A-2 User’s Guide

JP29

2-3

2-3

2-3

Jumper Summary

User’s Guide A-3

3.45V CPU TYPE

Intel

486DX4

(W/T)

Intel

486DX4

(W/B)

AMD

486DX2

AMD

486DX4

(V8T)

AMD

486DX4-S

(SV8T)

AMD

486DX4-S

(SV8B)

JP6

Open

Open

Open

Open

Open

Open

JP7

2-3

1-2

2-3

2-3

2-3

1-2

JP8

Open

1-2

Open

Open

Open

1-2

JP9

Open

1-2

2-3

Open

Open

1-2

JP10

1-2

1-2

Open

Open

1-2

1-2

JP12

Open

Open

Open

Open

Open

Open

JP13

Open

Open

Open

Open

Open

Open

JP14

2-3

2-3

Open

Open

2-3

2-3

JP15

1-2, 3-4

1-2, 3-4

1-2, 3-4

1-2, 3-4

1-2, 3-4

1-2, 3-4

JP16

3-4

3-4

3-4

3-4

3-4

3-4

JP17

3-4

1-2, 3-4

Open

Open

3-4

1-2, 3-4

JP18

Open

1-2

Open

Open

Open

1-2

JP19

1-2

2-3

Open

Open

1-2

2-3

JP20

4-5

4-5

Open

Open

4-5

4-5

JP29

1-2

1-2

1-2

1-2

1-2

1-2

TI 486DX2

Cyrix

486DX2/

486DX4

(M7 P/O)

Cyrix

486DX4

(iDX4 P/O)/

5X86

TI DX4

AMD

Am5x86

JP6

Open

Open

Open

Open

Open

JP7

2-3

2-3

2-3

2-3

1-2

JP8

Open

Open

1-2

Open

1-2

JP9

Open

Open

1-2

Open

1-2

JP10

1-2

1-2

1-2

1-2

1-2

JP12

Open

Open

Open

2-3

1-2

JP13

2-3

2-3

Open

2-3

Open

JP14

1-2

1-2

2-3

1-2

2-3

JP15

1-2, 3-4

1-2, 3-4

1-2, 3-4

1-2, 3-4

1-2, 3-4

JP16

3-4

3-4

3-4

3-4

3-4

JP17

2-3

2-3

1-2, 3-4

2-3

1-2, 3-4

JP18

2-3

2-3

1-2

2-3

1-2

JP19

Open

Open

2-3

Open

2-3

JP20

2-3

2-3

4-5

2-3

4-5

JP29

1-2

1-2

1-2

1-2

1-2

Jumper Summary

A-4 User’s Guide

Oscillator Frequency

25 MHz

33 MHz

40 MHz

JP25

2-3

1-2

1-2

JP26

2-3

1-2

2-3

JP27

1-2

1-2

1-2

Flash ROM Type

Type

JP24

12V Flash ROM

2-3

5V EEPROM or Flash ROM

1-2

ECP DMA Channel

DMA Channel

JP22

JP23

DMA 1

2-3

2-3

DMA 3

1-2

1-2

FDC and Super I/O Chip

Function

JP21

Enabled

1-2

Disabled

2-3

Jumper Summary

User’s Guide A-5

Cache Type and Size

Cache Size

JP1

JP2

JP3

JP4

JP5

32 KB x 4 = 128 KB

1-2, 3-4

1-2

2-3

1-2

1-2

32 KB x 8 = 256 KB

2-3, 4-5

2-3

2-3

1-2

2-3

64 KB x 4 = 256 KB

1-2, 3-4

1-2

1-2

1-2

2-3

64 KB x 8 = 512 KB

2-3, 4-5

2-3

2-3

2-3

2-3

128 KB x 4 = 512 KB

1-2, 3-4

1-2

2-3

2-3

2-3

CMOS

Function

JP28

Normal

1-2

Clear CMOS

2-3

Onboard Connectors

Connector

Function

JP11

Reserved

JP31

HDD LED connector

J7

Multifunction connector

J8

External battery connector

CN3

2-pin fan connector

CN4

4-pin fan connector

CN2

Power connector

Appendix

SiS Drivers B

User’s Guide B-1

This appendix tells how to install the SiS supported drivers using the
installation utility.

DOS, Windows, WFW (Workgroup) and NetWare

To install DOS, Windows, WFW (Workgroup) and NetWare drivers,
simply run INSTALL.EXE.

Windows NT

1. From the Windows NT Setup Options menu, select

Add/Remove SCSI Adapters.

2. Select the Add button in the SCSI Adapter Setup.

3. From the Adapter: list dialog box, select Others (Requires

a disk from a hardware manufacturer).

4. The Insert Diskette dialog box appears. Insert the SiS driver into

drive A and type A:WINNT.

5. The screen displays the Select OEM Option dialog box. Select

SiS 32-bit Local-bus IDE Adapter and click on OK.

6. The Select SCSI Adapter Option dialog box appears. Click on

Install. This installs the drivers to the hard disk.

7. Installation is successful if the SCSI Adpater Setup dialog box

reappears and SiS 32-bit Local-bus IDE Adapter appears on the
list of installed drivers.

8. Reboot the system.

SiS Drivers

B-2 User’s Guide

OS/2

1. From the OS/2 desktop, open the OS/2 system.

2. Open System Setup.

3. Select Device Driver Install.

4. Insert the driver diskette into drive A or B.

5. Change the source directory to A:\OS2 or B:\OS2.

6. Select Install.

7. Click on OK.

SCO UNIX

To install the SCO UNIX drivers, refer to the README.SCO file in the
SCO directory.

Installing SCO UNIX 3.2.X

1. Install SCO UNIX 3.2.4.X or SCO Open Desktop 2.X using the
default SCO UNIX IDE drivers.

2. Boot your SCO UNIX system and bring it into single-user mode.

3. Copy the SiS496.TAR file to your /TMP directory using the doscp
command. For example, if you are using drive A, type:

DOSCP A:SIS496.TAR/TMP

4. Prepare a SCO UNIX formatted diskette.

5. From the root directory, type the following commands:

 MKDIR/SIS
 CD/SOS

SiS Drivers

User’s Guide B-3

 TAR XVF/TMP/SIS486.TAR

6. Insert the diskette into the drive and enter the following
command:

TAR CVF/DEV/(diskette drive 0 device name)

Your diskette drive 0 device name may be:

 RFD096DS15 5.25 DSHD
 RFD0135DS18 3.5 DSHD
 RFD048DS9 5.25 DSHD
 RFD0135DS9 3.5 DSHD

7. Start the installation by typing CUSTOM.

8. Follow the screen instructions to install the SiS IDE driver. A new
kernel replaces the original kernel and the original kernel is
renamed as UNIX.OLD.

9. Reboot your system for the new kernel to take effect. The new

kernel initializes the chip to the new timing setting.