American Megatrends Atlas III PCI User manual

Atlas PCI-III Pentium
ISA Motherboard
User's Guide
MAN-757
10/16/98

Atlas PCI-III PCI Pentium ISA Motherboard User’s Guide
ii
© Copyright 1997 American Megatrends, Inc.
All rights reserved.
American Megatrends, Inc.
6145F Northbelt Parkway
Norcross, GA 30071
This publication contains proprietary information which is protected by copyright. No part of this publication may be reproduced, transcribed,
stored in a retrieval system, translated into any language or computer language, or transmitted in any form whatsoever without the prior written
consent of the publisher, American Megatrends, Inc.
Limited Warranty
Buyer agrees if this product proves to be defective, that American Megatrends, Inc. is only obligated to replace or refund the purchase price of this
product at American Megatrends’ discretion according to the terms and conditions on the motherboard warranty card. American Megatrends shall
not be liable in tort or contract for any loss or damage, direct, incidental or consequential. Please see the Warranty Registration Card shipped with
this product for full warranty details.
Limitations of Liability
In no event shall American Megatrends be held liable for any loss, expenses, or damages of any kind whatsoever, whether direct, indirect,
incidental, or consequential, arising from the design or use of this product or the support materials provided with the product.
Trademarks
Intel and Pentium are registered trademarks of Intel Corporation.
MS-DOS, Microsoft Word, and Microsoft are registered trademarks of Microsoft Corporation.
AMD is a registered trademark of Advanced Micro Devices, Inc.
SMC is a registered trademark of Standard Microsystems Corporation.
IBM, AT, VGA, PS/2, OS/2, and EGA are registered trademarks of International Business Machines Corporation. XT and CGA are trademarks of
International Business Machines Corporation.
Fujitsu is a registered trademark of Fujitsu America, Inc.
Motorola is a registered trademark of Motorola Corporation.
Hitachi is a registered trademark of Hitachi America, Ltd.
PNY is a registered trademark of PNY Corporation.
Oki is a registered trademark of Oki America, Inc.
NEC is a registered trademark of NEC Corporation.
Samsung is a registered trademark of Samsung Electronics Corporation.
Siemens is a trademark of Siemens Corporation.
Mitsubishi is a registered trademark of Mitsubishi Electronics of America.
Micron is a registered trademark of Micron Corporation.
SCO, UnixWare, and Unix are registered trademarks of The Santa Cruz Operation, Inc.
Toshiba is a registered trademark of Kabushiki Kaisha Toshiba.
VESA is a trademark of the Video Electronics Standards Association.
All other brand and product names are trademarks or registered trademarks of their respective companies.
Revision History
2/26/97 Initial release.
11/20/97 Added VRM information.
10/16/98 Added J4 description.

Preface iii
Table of Contents
1 HARDWARE INSTALLATION................................................................ 1
Atlas PCI-III Dimensions ........................................................................................................5
Installation Steps.....................................................................................................................6
Atlas PCI-III Motherboard Layout...........................................................................................7
Step 1 Unpack the Motherboard...............................................................................................8
Set Jumpers.............................................................................................................................9
Avoid Static Electricity............................................................................................................9
Step 2 Configure CPU ...........................................................................................................10
Step 3 Install Memory ...........................................................................................................15
Step 4 Install the Motherboard...............................................................................................19
Step 5 Attach Cables .............................................................................................................20
Step 6 Onboard I/O................................................................................................................27
Step 7 Attach Floppy Drive....................................................................................................29
Step 8 Attach IDE Drive........................................................................................................31
Step 9 Test and Configure .....................................................................................................35
2 WINBIOS®SETUP................................................................................37
Using a Mouse with WINBIOS Setup....................................................................................38
Using the Keyboard with WINBIOS Setup.............................................................................38
WINBIOS Setup Menu..........................................................................................................39
Section 1 Setup.........................................................................................................................40
Standard Setup......................................................................................................................40
Advanced Setup.....................................................................................................................44
Chipset Setup ........................................................................................................................48
Power Management Setup .....................................................................................................49
PCI/PnP Setup.......................................................................................................................53
Peripheral Setup....................................................................................................................57
Section 2 Security....................................................................................................................61
AMIBIOS Password Support.................................................................................................61
Setting a Password.................................................................................................................62
Changing a Password ............................................................................................................63
Anti-Virus.............................................................................................................................63
Section 3 Utility.......................................................................................................................64
Section 4 Default......................................................................................................................64
3 PROGRAMMING THE FLASH ROM....................................................65
Bootblock Code Checkpoint Codes ........................................................................................68
A SPECIFICATIONS................................................................................69
INDEX...................................................................................................... 71

Atlas PCI-III PCI Pentium ISA Motherboard User’s Guide
iv
Preface
To the OEM Thank you for purchasing the high performance American Megatrends Atlas
PCI-III Pentium ISA motherboard. This product is a state of the art
motherboard that includes the famous AMIBIOS. It is assumed that you have
also licensed the rights to use the American Megatrends documentation for the
American Megatrends Atlas PCI-III motherboard
This manual was written for the OEM to assist in the proper installation and
operation of this motherboard. This manual describes the specifications and
features of the Atlas PCI-III motherboard. It explains how to assemble a system
based on the Atlas PCI-III motherboard and how to use the AMIBIOS that is
specifically designed for this motherboard.
This manual is not meant to be read by the computer owner who purchases a
computer with this motherboard. It is assumed that you, the computer
manufacturer, will use this manual as a sourcebook of information, and that
parts of this manual will be included in the computer owner's manual.
Disclaimer
AMI only certifies that this product will work correctly when this
product is used with the same jumper settings, the same system
configuration, the same memory module parts, and the same
peripherals that were tested by AMI with this product. The complete
list of tested jumper settings, system configurations, peripheral
devices, and memory modules are documented in the AMI
Compatibility Report for this product. Call your AMI sales
representative for a copy of the Compatibility Report for this product.
Technical Support
If you need help installing, configuring, or running this product, call American
Megatrends technical support at 770-246-8645. You can send questions to
technical support at:
[email protected].
Web Site We invite you to access the American Megatrends world wide web site at:
http://www.ami.com.

Preface v
Packing List
You should have received the following:
• an Atlas PCI-III Pentium ISA motherboard,
• two serial cables,
• one parallel cable,
• a Warranty Card, and
• the Atlas PCI-III Pentium ISA Motherboard User's Guide.
You may also purchase an optional USB cable and mounting bracket.
Warning
The pinout for the optional USB Cable Box is:
Pin 1 Red VCC
Pin 2 Green Data +
Pin 3 White Data -
Pin 4 Black Ground
Please make sure that the USB cable is correctly installed. Incorrect
installation will damage the motherboard.
Static Electricity
This motherboard can easily be damaged by static electricity. Make sure you
take appropriate precautions against static electric discharge:
• wear a properly-grounded wristband while handling the motherboard or
any other electrical component,
• touch a grounded anti-static surface or a grounded metal fixture before
handling the Atlas PCI-III motherboard,
• handle system components by the mounting bracket, if possible.
Batteries Make sure you dispose of used batteries according to the battery manufacturer’s
instructions. Improper use of batteries may cause an explosion. Make sure you
follow the battery manufacturer’s instructions about using the battery. Replace
used batteries with the same type of battery or an equivalent recommended by
the battery manufacturer.

Chapter 1 Hardware Installation 1
1Hardware Installation
Overview
The American Megatrends Atlas PCI-III Pentium ISA motherboard includes
the following features.
CPU The motherboard supports an AMD® K6 or Intel® Pentium® P54C or P55C
CPU operating at 75, 90, 100, 120, 133, 150, 166, 180, 200 MHz or higher.
The CPU speed and voltage are set via jumpers.
Chipset The Atlas PCI-III Pentium ISA motherboard uses an Intel 82430HX chipset,
including CPU interface controller, advanced cache controller, integrated
DRAM controller, synchronous ISA bus controller, PCI local bus interface, and
integrated power management unit.
Expansion slots The motherboard includes four 16-bit ISA expansion slots and four 32-bit PCI
expansion slots. The PCI local bus throughput can be up to 132 megabytes per
second.
L1 Internal Cache The Intel Pentium on the motherboard has an 8 KB data cache and an 8 KB
instruction cache.
L2 Secondary Cache The motherboard has either 256 KB or 512 KB of synchronous Pipelined
Burst SRAM, direct-mapped, write-back. L2 secondary cache memory. Cont’d

Atlas PCI-III PCI Pentium ISA Motherboard User’s Guide
2
Overview, Continued
DRAM Cached If 256 KB of L2 secondary cache memory is installed on the motherboard, up to
128 MB of system memory can be cached.
If 512 KB of L2 secondary cache memory is installed on the motherboard, up to
256 MB of system memory can be cached.
System Memory The motherboard supports up to 256 MB of system memory mounted on the
motherboard in two banks of 72-pin 4 MB, 8 MB, or 16 MB x 36 SIMMs.
Use Fast Page Mode, ECC, or Extended Data Out (EDO) SIMMs operating at
60 ns.
Fast ATA The motherboard supports the Fast ATA specification using PIO mode 4 and
multiword DMA mode 2.
System BIOS This motherboard has a 128 KB AMIBIOS system BIOS on a Flash ROM with
built-in WINBIOS® Setup.
BIOS Shadowing The system BIOS is always copied from ROM to RAM for faster execution.
The end user can shadow 16 KB ROM segments from C0000h – DCFFFh.
Motherboard Size The Atlas PCI-III Pentium ISA motherboard is 13 inches by 8.5 inches.
Cont’d

Chapter 1 Hardware Installation 3
Overview, Continued
AMIBIOS Features AMIBIOS features include:
• IDE block mode support,
• IDE 32-bit data transfer support,
• IDE Programmed I/O mode 0, 1, 2, 3, and 4 support,
• IDE LBA mode support,
• APM (Advanced Power Management) and Flash BIOS hooks,
• EPA Green PC-compliant,
• PCI and Plug and Play (PnP) support, and
• DIM (Device Initialization Manager) support,
• DMI (Desktop Management Interface) support,
• ATAPI support,
• can boot from a CD-ROM drive,
• automatically detects system memory, cache memory, and IDE drive
parameters,
• Intel NSP-compliant,
• Fast ATA IDE mode programming,
• Boot sector virus protection,
• instant-on support,
• automatically configures PnP and PCI devices.
IDE The Atlas PCI-III motherboard has two 40-pin IDE connectors onboard that
support up to four IDE drives. The IDE controller is on the PCI local bus.
Floppy The motherboard has an onboard floppy controller that supports up to two 360
KB, 720 KB, 1.2 MB, 1.44 MB, or 2.88 MB floppy drives.
Parallel Port The Atlas PCI-III motherboard has an onboard ECP and EPP-capable parallel
port connector.
Serial Ports The Atlas PCI-III motherboard has two onboard serial port connectors and two
16550 UART serial ports.
Keyboard The Atlas PCI-III motherboard Includes a standard DIN keyboard connector.
Cont’d

Atlas PCI-III PCI Pentium ISA Motherboard User’s Guide
4
Overview, Continued
Mouse The Atlas PCI-III motherboard includes both an optional miniDIN PS/2 mouse
connector and a 10-pin berg mouse connector.
USB The Atlas PCI-III motherboard has two 4-pin USB connectors. USB allows
future generations of USB-compliant peripheral devices to be automatically
detected and configured through a single port. The AMIBIOS on the Atlas PCI-
III motherboard provides complete USB system BIOS support.
Power Connectors The Atlas PCI-III motherboard has three power supply connectors.
RTC/CMOS RAM A real time clock and 128 bytes of CMOS RAM with a battery backup is
provided on the motherboard.
Power Management Power management services include:
• Green PC LED,
• power management signal to Green PC-aware power supplies,
• automatic IDE and video power down,
• monitor blanking,
• SMI (System Management Interrupt) support,
• APM, and
• system stop clock. Cont’d

Chapter 1 Hardware Installation 5
Overview, Continued
PCI Slots The motherboard conforms to the PCI Version 2.1 specification. The PCI slots
are automatically configured by the AMIBIOS. The PCI slots operate
synchronously with the CPU clock, as follows:
CPU External Clock Frequency PCI Expansion Slot Frequency
66 MHz 33 MHz
60 MHz 30 MHz
50 MHz 25 MHz
Onboard I/O The Atlas PCI-III Pentium ISA motherboard includes:
• two 40-pin IDE connectors on the PCI bus that support up to four IDE drives,
• a 34-pin floppy drive connector,
• two 10-pin serial port connectors (with 16550 UARTs),
• a 26-pin parallel port connector with ECP and EPP support,
• two USB connectors,
• a keyboard connector, and
• a PS/2 mouse connector.
Atlas PCI-III Dimensions
Expansion
Slots
0.62"
Keyboard
Connector
0.85"
SIMM
Sockets
2.5"
CPU Heat Sink
1.75"
13"
8.5"Heat Sink
1.5"

Atlas PCI-III PCI Pentium ISA Motherboard User’s Guide
6
Installation Steps
Step Action Turn to
1Unpack the motherboard. Page 8
2Configure the CPU. Page 10
Select the CPU voltage. Page 11
Select the CPU speed. Page 10
Install the CPU. Page 12
3Install memory. Page 15
4Install the motherboard. Page 19
5Attach cables to connectors. Page 20
Connect the power supply. Page 21
Attach the keyboard cable. Page 22
Connect the mouse cable. Page 23
Attach cables. Page 24
6Connect onboard I/O. Page 27
Connect the serial ports. Page 27
Connect the parallel port. Page 28
7Connect floppy drive(s). Page 29
8Connect the IDE drive(s). Page 30
9Test and configure. Page 35
Warning
This motherboard contains sensitive electronic components that
can be easily damaged by static electricity. Follow the
instructions carefully to ensure correct installation and to avoid
static damage.

Chapter 1 Hardware Installation 7
Atlas PCI-III Motherboard Layout

Atlas PCI-III PCI Pentium ISA Motherboard User’s Guide
8
Step 1 Unpack the Motherboard
Step Action
1Inspect the cardboard carton for obvious damage. If damaged, call
770-246-8645. Leave the motherboard in its original packing.
2Perform all unpacking and installation procedures on a ground-
connected anti-static mat. Wear an anti-static wristband grounded
at the same point as the anti-static mat. Or use a sheet of
conductive aluminum foil grounded through a 1 megohm resistor
instead of the anti-static mat. Similarly, a strip of conductive
aluminum foil wrapped around the wrist and grounded through a 1
megohm resistor serves the same purpose as the wristband.
3Inside the carton, the motherboard is packed in an anti-static bag,
and sandwiched between sheets of sponge. Remove the sponge and
the anti-static bag. Place the motherboard on a grounded anti-static
surface component side up. Save the original packing material.
4Inspect the motherboard for damage. Press down on all ICs
mounted in sockets to verify proper seating. Do not apply power to
the motherboard if it has been damaged.
5If the motherboard is undamaged, it is ready to be installed.

Chapter 1 Hardware Installation 9
Set Jumpers
Set all jumpers and install the CPU before placing the motherboard in the
chassis. Set jumpers by placing a shunt (shorting bridge) on the designated pins
of the jumper. A shunt and jumpers are shown below:
Shunt3-pinBerg2-pinBerg
Inthismanual,jumpersareshownintwo-dimensions,
asifviewedfromdirectlyabove,as shown below:
1
3
5
2
4
6
Theplacementofshuntsis
indicated byasolidline
between pins,as shown
betweenPins1-2
totheright:
1
3
5
2
4
6
3-dimensionalviewofmotherboardjumpersand ashunt.
Avoid Static Electricity
Static electricity can damage the motherboard and other computer components.
Keep the motherboard in the anti-static bag until it is to be installed. Wear an
anti-static wrist grounding strap before handling the motherboard. Make sure
you stand on an anti-static mat when handling the motherboard.
Avoid contact with any component or connector on any adapter card, printed
circuit board, or memory module. Handle these components by the mounting
bracket.

Atlas PCI-III PCI Pentium ISA Motherboard User’s Guide
10
Step 2 Configure CPU
See the drawing on page 7for the jumper locations.
Important
Perform the following steps to configure the
motherboard before installing a CPU.
External and Internal CPU Clock J5, J6, J7, and J8 are 2-pin bergs that set the CPU external
and internal clock frequencies. J5, J76, J7, and J8 are next to the CPU socket.
Place a shorting bridge on the two pins if the chart specifies that the jumper is
to be shorted. Do not place a shorting bridge on the jumper if the following
table specifies OPEN. See the drawing on page 7for the exact jumper locations.
The factory setting is for a 100 MHz CPU.
External Internal J5 J6 J7 J8
50 MHz 75 MHz Shorted Shorted OPEN OPEN
60 MHz 90 MHz Shorted OPEN OPEN OPEN
60 MHz 120MHz Shorted OPEN OPEN Shorted
60 MHz 150 MHz Shorted OPEN Shorted Shorted
60 MHz 180 MHz Shorted OPEN Shorted OPEN
66 MHz 100 MHz OPEN Shorted OPEN OPEN
66 MHz 133 MHz OPEN Shorted OPEN Shorted
66 MHz 166 MHz OPEN Shorted Shorted Shorted
66 MHz 200 MHz OPEN Shorted Shorted OPEN
Important
Please contact American Megatrends technical support at 770-246-
8645 if you need to support a CPU running at a higher speed.
PCI Bus Clock J15 is a 3-pin berg that specifies the PCI bus clock speed. Short Pins 1-2 for a
66 (33) MHz CPUCLK. Short Pins 2-3 for a 75 (25) MHz CPUCLK. Cont’d

Chapter 1 Hardware Installation 11
Step 2 Configure CPU, Continued
J14 Set CPU Voltage Install Intel Pentium P54C, P55C, or AMD K6 CPUs that adhere to either
the standard or VRE voltage specifications. J14 is a 2-pin berg that sets the
CPU voltage.
CPU VRM Status J14 Setting
Intel P54C NO VRM Shorted
(factory setting)
Intel P55C Use a 2.8V Voltage Regulator
Module in the VRM socket OPEN
AMD K6 Use a 3.1V Voltage Regulator
Module in the VRM socket OPEN
No VRM for
Intel P54C
CPUs
(Factory
Setting)
Pins
1
3
5 J14
Pins
2
4
6
2.8V VRM for
Intel P55C
CPUs
Pins
1
3
5 J14
Pins
2
4
6
3.1V VRM for
AMD K6
CPUs
Pins
1
3
5 J14
Pins
2
4
6
Cont’d

Atlas PCI-III PCI Pentium ISA Motherboard User’s Guide
12
Step 2 Configure CPU, Continued
Important
If you are not sure about the voltage specification for the CPU that
will be installed in this motherboard, please call Intel and make
sure that you set the voltage jumpers correctly. Selecting the wrong
voltage may damage the CPU.
Voltage Regulator Modules Use the following Voltage Regulator Modules (VRMs) in this
motherboard:
CPU Type and
Speed Description Corsair VRM7 Part Number VXI Electronics VRM7 Part
Number
Intel® P54C Use MB 3.3V N/A N/A
Intel P55C
up to 233 MHz 2.8V 7.5 Amps Call AMI for AMI Part Number
MDL-P55C-V2A075
Call AMI for
AMI Part Number
MDL-P55C-V2A075
166 or 200
MHz AMD®
K6
2.9V 7.5 Amps SP5260TS-2X9 073-20723-29
233 MHz
AMD K6 3.2V 9.5 Amps SP5260TS-3X2 073-20723-32
AMI Order Number Call AMI Sales at 800-828-9264.
VXI Contact Earlene Tyson
800-648-8978 extension 227.
Corsair Contact Corsair requires a minimum order of 50 VRMs.
John Beekly
408-559-17 77.

Chapter 1 Hardware Installation 13
Step 2 Configure CPU, Continued
Install CPU Install the CPU in the ZIF (zero insertion force) socket by performing the
following steps. The CPU socket is near one edge of the motherboard, as shown
on page 7.
Warning
Improper CPU installation can damage the CPU and the
motherboard. You must follow the procedures in this
section exactly as documented. Make sure you wear an
antistatic wristband while installing the CPU. Follow all
antistatic procedures described on page 9.
Cont’d

Atlas PCI-III PCI Pentium ISA Motherboard User’s Guide
14
Step 2 Configure CPU, Continued
Step Action
1Lift the lever on the ZIF socket. The empty CPU socket looks like
this.
2Check for bent pins on the CPU. Gently straighten any bent pins
with pliers. Place the CPU in the middle of the socket. Make sure
that pin 1 of the CPU is aligned with pin 1 of the socket. Make
sure you are properly grounded while handling the CPU.
3Complete installation by lifting the ZIF lever to the other side of
the socket, as shown below.
Enable External SMI J2 is a 2-pin berg that enables an external SMI source. Place a shorting
bridge on J2 (the factory setting) to enable external SMIs.
Enable Refresh J3 is a 2-pin berg. Always make sure that J3 is OPEN.
J4 Enable PCI SERR# Signal J4 is a two-pin berg that enables the PCI SERR# signal. Always
make sure that J4 is OPEN.