American Megatrends Atlas PCI-II User manual

Atlas PCI-II
Pentium
ISA Motherboard
User's Guide
MAN-727
4/30/96

Atlas PCI-II Motherboard User’s Guideii
© Copyright 1985-2010 American Megatrends, Inc.
All rights reserved.
American Megatrends, Inc.
5555 Oakbrook Parkway, Building 200,
Norcross, GA 30093
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 AmericanMegatrend's
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 Overdrive are registered trademarks of Intel Corporation.
VESA is a registered trademark of the Video Electronics Standards Association.
MS-DOS, Microsoft Word, and Microsoft are registered trademarks of Microsoft Corporation.
SMC is a registered trademark of SMC 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 ofFujitsu 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 ofOki America, Inc.
NEC is a registered trademark of NEC Corporation.
Samsung is a registered trademark ofSamsung Electronics Corporation.
Siemens is a trademark ofSiemens Corporation.
Mitsubishi is a registered trademark of Mitsubishi Electronics of America.
Micron is a registered trademark of Micron Corporation.
Unix is a registered trademark of American Telephone and Telegraph Company Bell Laboratories.
Weitek is a trademark ofWeitek, Inc.
Toshiba is a registered trademark ofKabushikiKaisha Toshiba.
VESA, VBE/PM, and DPMS are trademarks of Video Electronics Standards Association.
All other brand and product names are trademarks or registered trademarks of their respective companies.
Revision History
9/30/95Initial release of preliminary version.
11/3/95Minor corrections to manual.
3/19/96WINBIOS Setup option default settings were modified.
4/30/96Updated manual.

Preface iii
Table of Contents
1 Hardware Installation............................................... 1
Atlas PCI-II Dimensions...........................................................................2
Atlas PCI-II Motherboard Layout...........................................................4
Step 1 Unpack the Motherboard.............................................................5
Avoid Static Electricity.............................................................................5
Step 2 Configure CPU...............................................................................6
Step 3 Install Memory.............................................................................12
Step 4 Install the Motherboard..............................................................18
Step 5 Attach Cables...............................................................................20
Step 6 Test and Configure......................................................................37
2 WINBIOS Setup.......................................................39
Section 1 Setup...........................................................................................43
Standard Setup.........................................................................................43
Advanced Setup......................................................................................46
Chipset Setup...........................................................................................52
Power Management Setup.....................................................................56
Peripheral Setup.......................................................................................59
Section 2 Utility..........................................................................................71
Section 3 Security......................................................................................72
AMIBIOS Password Support................................................................72
Setting a Password..................................................................................72
Changing a Password.............................................................................73
Anti-Virus.................................................................................................73
Section 4 Default........................................................................................74
3 Programming the Flash ROM..............................75
A Specifications.........................................................79
Appendix B Configuring an Offboard IDE
Controller.....................................................................81
Index..............................................................................83

Atlas PCI-II Motherboard User’s Guideiv
Preface
To the OEM Thank you for purchasing the high performance
American Megatrends Atlas PCI-II 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-II 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-II
motherboard. It explains how to assemble a system
based on the Atlas PCI-II 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.
Technical Support If an American Megatrends motherboard
fails to operate as described or you are in doubt
about a configuration option, please call technical
support at 770-246-8645.

Preface v
American Megatrends BBS
The American Megatrends BBS permits OEMs,
VARs, and system integrators to access technical
information about motherboard and BIOS products.
Product Engineering Change Notices, Tech Tips,
Technical Notes, and complete technical manuals
are available.
Data Transmission RatesThe American Megatrends BBS
automatically handles modems with data
transmission rates from 1,200 to 28,800bps.
BBS Phone Numbers The following table lists the characteristics
of the BBS phone numbers. The BBS requires no
parity, eight data bits, and one stop bit.
Phone
Number Characteristics
770-246-8780 28,800 baud rate. Supports v.34.
770-246-8781 28,800 baud rate. Supports v.34.
770-246-8782 Supports HST and v.42.
770-246-8783 Supports HST and v.42.

Atlas PCI-II Motherboard User’s Guidevi
Packing List
You should have received the following:
• an Atlas PCI-II motherboard,
• two serial cables,
• one parallel cable,
• a Warranty Card, and
• theAmerican Megatrends Atlas PCI-II
Pentium ISA Motherboard User's Guide.

Chapter 1 Hardware Installation 1
1Hardware Installation
Overview
The American Megatrends Atlas PCI-II Pentium
ISA motherboard features include:
• support for an Intel Pentium 3.3V CPU
operating at 75, 90, 100, 120, 133, 150, 166, or
200 MHz,
• support for up to 256 MB of system memory,
• parity checking for system memory,
• interleaved memory,
• PCI local bus throughput of 132 megabytes per
second,
• four ISA expansion slots, and
• four PCI expansion slots.
The motherboard conforms to the PCI Version 2.0
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-II Pentium ISA motherboard
includes:
• two 40-pin IDE connectors that support up to four
IDE drives,
• the onboard I/O connectors are on the PCI local bus,
• a 34-pin floppy drive connector,
• two 10-pin serial port connectors,
• a 26-pin parallel port connector,
• a keyboardminiDIN connector, and
• a 10-pin berg mouse connector.

Atlas PCI-II Motherboard User’s Guide2
Atlas PCI-II Dimensions
Themotherboard dimensions and height
restrictions are shown below.
The Atlas PCI II motherboard is the standard baby
AT size with the standard mounting holes.

Chapter 1 Hardware Installation 3
Installation Steps
Step Action Turn to
1Unpack the motherboard. Page5
2Configure the CPU. Page6
Configure the CPU. Page6
Select the CPU 3.3V Power
Source Page6
Select the CPU Voltage. Page8
Select the CPU Speed. Page8
Install the CPU. Page10
3Install memory. Page12
Install System Memory. Page12
Configure Cache Memory. Page16
4Install the Motherboard. Page19
5Attach cables to connectors. Page22
Attach VGA Connectors. Page22
Connect the Power Supply. Page27
Attach the Keyboard Cable. Page30
Connect the Mouse Cable. Page31
Attach Cables. Page31
Connect Onboard I/O. Page31
Connect the Serial Ports. Page31
Connect the Parallel Port. Page31
Connect Floppy Drive(s). Page33
Connect the IDE Drive(s). Page38
6Test and Configure. Page45
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.

Atlas PCI-II Motherboard User’s Guide4
Atlas PCI-II Motherboard Layout

Chapter 1 Hardware Installation 5
Step 1Unpack 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 1megohm resistor instead of the
anti-static mat. Similarly, a strip of conductive aluminum foil
wrapped around the wrist and grounded through a 1megohm 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.
Set Jumpers Set all jumpers and install the CPU before placing
the motherboard in the chassis.
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-II Motherboard User’s Guide6
Step 2 Configure CPU
Jumpers J2, J11, J12, J21, J24, J25, J37, J39, and J46
are used to select the CPU type. See the drawing on
page4for the jumper locations.
Important
Perform the following steps to configure the
motherboard before installing any CPU.
3.3V CPU PowerJ21, J2, and J12 are six-pin bergs that select the 3.3V
CPU power source. You can provide 3.3V in three
different ways through three different power
sources:
• regulator (default),
• regulator and VRM, or
• 3.3V power supply.
From RegulatorSet J21, J2, and J12 as follows to configure
3.3V power from the regulator:
J21
Pin1
Pin6
2
3 4
5
J12
Pin1
Pin6
2
34
5
J2
Pin1
Pin6
2
34
5
Cont’d

Chapter 1 Hardware Installation 7
Step 2 Configure CPU, Continued
3.3V CPU Power, cont’d
From Regulator and VRMSet J21, J2, and J12 as follows to
configure 3.3V power from the regulator and VRM:
J21
Pin1
Pin6
2
3 4
5
J12
Pin1
Pin6
2
3 4
5
Pin1
Pin6
2
3 4
5
J2
From 3.3V Power SupplySet J21, J2, and J12 as follows to
configure 3.3V power from the 3.3V power supply:
J21
Pin 1
Pin6
2
3 4
5
J12
Pin1
Pin6
2
34
5
Pin1
Pin6
2
3 4
5
J2
Cont’d

Atlas PCI-II Motherboard User’s Guide8
Step 2 Configure CPU, Continued
Select CPU Voltage The Atlas PCI-II motherboard supports
Intel Pentium CPUs that adhere to either the
standard or VRE voltage specifications. J11 is a
three-pin berg that selects the CPU voltage.
J11 Pins1-2Shorted
StandardCPU VoltageJ11 Pins2-3Shorted
VRECPU Voltage
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 J11 correctly. Selecting
the wrong voltage may damage the CPU.
Select CPU SpeedJ24, J25, J39, and J37 are two-pin bergs that
together set the CPU speed.
CPU Speed J25 J24 J39 J37
75 MHz Shorted Shorted OPEN OPEN
90 MHz OPEN Shorted OPEN OPEN
100 MHz Shorted OPEN OPEN OPEN
120 MHz OPEN Shorted Shorted OPEN
133 MHz Shorted OPEN Shorted OPEN
150 MHz OPEN Shorted Shorted Shorted
166 MHz Shorted OPEN Shorted Shorted
200 MHz Shorted OPEN OPEN Shorted
Important
Please contact American Megatrends technical support at
770-246-8645 to support a CPU running at a higher speed.
Cont’d

Chapter 1 Hardware Installation 9
Step 2 Configure CPU, Continued
Connect CPU FanJ46 (shown below) is a two-pin berg that connects
the fan on the CPU heat sink.
Pentium CPUs running at 75 and 90 MHz are
shipped with a heat sink.
CPUs running at 100, 120, 133 MHz, or higher
speeds are shipped witha heat sink and a CPU fan.
As shown below, the wire from the CPU fan has two
leads. Connect the yellow lead to +12V (Pin 1 of
J46).
Warning
The yellow wire from the CPU fan must be
connected to Pin 1 of J46.

Atlas PCI-II Motherboard User’s Guide10
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 page4.
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 5.
Step Action
1Lift the lever on the ZIF socket. The empty CPU socket
looks like this.

Chapter 1 Hardware Installation 11
Step Action
2Pin 1 of the socket has a white diagonal line across one
corner on the motherboard, which corresponds to pin 1
of the CPU. Check for bent pins on the CPU. Gently
straighten any bent pins with pliers. Place the CPU in
the middle of the socket, as shown below. 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.
TM
3Complete installation by lifting the ZIF lever to the
other side of the socket, as shown below.

Atlas PCI-II Motherboard User’s Guide12
Step 3 Install Memory
System MemoryThere are four 32-bit DIMM/SIMM – Single (or
Double) Inline Memory Module) sockets. Memory
must be populated one bank at a time. Each bank
has two sockets. Bank0 includes U10 and U7. Bank1
includes U5 and U2. Each bank must be populated
with the same type of SIMM/DIMM. If a 1 MB
SIMM is installed in the first socket in Bank0, then
the same type of 1 MB SIMM must be installed in
the second Bank0 SIMM socket. Each socket can
hold one SIMM or DIMM. You can use: 256 KB x 32
(or 36), 512 KB x 32 (or 36), 1 MB x 32 (or 36), 2 MB x
32 (or 36), 4 MB x 32 (or 36), 8 MB x 32 (or 36), or 16
MB x 32 (or 36) SIMMs.
The motherboard supports banks of fast page mode
and EDO (Extended Data Out) memory together
operating at 60 or 70ns (RAS access time). Set the
Chipset SetupDRAM Speed for EDOoption
correctly if using EDO memory.
Memory DisplaySystem memory is reported by AMIBIOS as it boots
and again when the AMIBIOS System
Configuration Screen is displayed just before the
operating system boots. The memory displayed by
AMIBIOS on the System Configuration Screen is
384 KB less than the total memory installed.
Select SIMMs SIMMs must meet the following specifications:
Parameter Specification
Page Mode FAST
Refresh CAS before RAS
tCAC ≤20ns
tRAC ≤80ns
tAA ≤45ns
tRP 70ns
tCPA ≤45ns
Cont’d

Chapter 1 Hardware Installation 13
Step 3 Install Memory, Continued
SIMM Part Numbers
Type Manufactur
er Part Number
256 KB x 36 Micron® MT9D25636M-7
“Mitsubishi® MH26636BJ-7
“Motorola® MCM36256S-70
“Oki® MSC2320A-70YS9
“PNY® P36256-70
“Samsung® KMM536256B-7
1 MB x 36 Micron MT12D136M-7
“Mitsubishi MH1M36ADJ-7
“PNY P361000-70
“Motorola MCM36100AS-70
“Oki MSC2355-70YS12
“Samsung KMM5361000AV-7
2 MB x 36 PNY P362000-70
“Samsung EMM53620036-70
4 MB x 36 Micron MT12D436M-7
“Mitsubishi MH4M36SAJ-7
“Motorola MCM36400S-70
“PNY P364000-70
“Samsung KMM5364100-7
8 MB x 36 Motorola MCM36800S-70
“PNY P368000-707
“Samsung KMM5368100-7
Cont’d

Atlas PCI-II Motherboard User’s Guide14
Step 3 Install Memory, Continued
Installing SIMMs There are four x 36 SIMM sockets located
on the Atlas PCI-II motherboard. These sockets can
be filled with either 256 KB x 32 (or 36), 512 KB x 32
(or 36), 1 MB x 32 (or 36), 2 MB x 32 (or 36), 4 MB x
32 (or 36), 8 MB x 32 (or 36), or 16 MB x 32 (or 36)
SIMMs.
Place the motherboard on an anti-static mat. With
the component side of the SIMM facing you, firmly
push the SIMM into the socket at an angle, then
push it up. When properly inserted, the SIMM
clicks into place as the latching pins engage. The
SIMM installation process is shown below:
123
Cont’d