Supermicro 440LX User manual

®
SUPER
440LX Chipset
AMI BIOS
REFERENCE MANUAL
Revision 1.1

The information in this User’s Manual has been carefully reviewed and is believed to be
accurate. The vendor assumes no responsibility for any inaccuracies that may be
contained in this document, makes no commitment to update or to keep current the
information in this manual, or to notify any person or organization of the updates.
The manufacturer reserves the right to make changes to the product described in this
manual at any time and without notice. This product, including software, if any, and
documentation may not, in whole or in part, be copied, photocopied, reproduced, translated
or reduced to any medium or machine without prior written consent.
IN NO EVENT WILL THE MANUFACTURER BE LIABLE FOR DIRECT, INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING FROM THE USE OR
INABILITY TO USE THIS PRODUCT OR DOCUMENTATION, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. IN PARTICULAR, THE VENDOR SHALL NOT HAVE
LIABILITY FOR ANY HARDWARE, SOFTWARE, OR DATA STORED OR USED WITH THE
PRODUCT, INCLUDING THE COSTS OF THE REPAIRING, REPLACING, OR
RECOVERING SUCH HARDWARE, SOFTWARE, OR DATA.
Copyright © 1998 by SUPERMICRO COMPUTER INC.
All rights reserved.
Printed in the United States of America.
Unless you request and receive written permission from the manufacturer, you may not
copy any part of this document.
All products and company names mentioned are trademarks or registered trademarks of
their respective holders.
Do not upgrade the BIOS unless you are notified to do so. Please call technical
support first before upgrading the boot-block BIOS.
SUPER BBS # [phone] (24 hours)
Baud Rate: 1200-14400 bps, Data Bits: 8, Stop Bit: 1, Parity: None

Table of Contents
Chapter 1: AMI BIOS
1-1 Introduction
System BIOS ....................................................................................... 1-1
Configuration Data............................................................................. 1-1
How Data Is Configured................................................................... 1-1
POST Memory Test ............................................................................ 1-1
1-2 BIOS Features...................................................................................... 1-2
BIOS Configuration Summary Screen ........................................... 1-3
AMIBIOS Setup ..................................................................................... 1-3
Chapter 2: Running Setup
2-1 Setup
2-1-1 Standard Setup.................................................................. 2-1
2-1-2 Advanced Setup................................................................. 2-4
2-1-3 Chipset Setup .................................................................... 2-7
2-1-4 Power Management........................................................ 2-13
2-1-5 PCI/PnP Setup ................................................................. 2-15
2-1-6 Peripheral Setup ............................................................. 2-18
2-2 Security Setup
2-2-1 Supervisor/User................................................................ 2-20
2-2-2 Anti-Virus ........................................................................... 2-21
2-3 Utility Setup
2-3-1 Language........................................................................... 2-21
2-3-2 Detect IDE.......................................................................... 2-21
2-4 Default Setting
2-4-1 Optimal Default................................................................. 2-22
2-4-2 Fail-Safe Default............................................................... 2-22
BIOS User's Manual
iii

Table of Contents
iv
Appendix A: BIOS Error Beep Codes...................... A-1
Appendix B: AMI BIOS POST Diagnostic Error
Messages........................................... B-1

PRINTED IN U.S.A.

Chapter 1: AMI BIOS
1-1
Chapter 1
AMI BIOS
1-1 Introduction
This chapter describes the AMIBIOS for the Intel 440FX/440LX
chipset which is designed for Intel Pentium® Pro 150/166/180/200
MHz and Pentium II 233/266/300 MHz processors. The AMI ROM
BIOS is stored in the Flash EEPROM and is easily upgraded
using a floppy disk-based program.
System BIOS
The BIOS is the basic input output system used in all IBM®PC,
XT™, AT®, and PS/2®compatible computers. The WinBIOS is a
high-quality example of a system BIOS.
Configuration Data
AT-compatible systems, also called ISA (Industry Standard Archi-
tecture) must have a place to store system information when the
computer is turned off. The original IBM AT had 64 bytes of non-
volatile memory storage in CMOS RAM. All AT-compatible sys-
tems have at least 64 bytes of CMOS RAM, which is usually part
of the Real Time Clock. Many systems have 128 bytes of CMOS
RAM.
How Data Is Configured
AMIBIOS provides a Setup utility in ROM that is accessed by
pressing <Del> at the appropriate time during system boot. Setup
configures data in CMOS RAM.
POST Memory Test
Normally, the only visible POST routine is the memory test. The
screen that appears when the system is powered on is shown on
the next page.
An AMIBIOS Identification string is displayed at the left bottom
corner of the screen, below the copyright message.

BIOS User's Manual
1-2
Made in U.S.A. Mainboard Rev 1.3
BIOS Release 120497
xxxxx KB OK
Hit <DEL> if you want to run SETUP
(C) American Megatrends Inc.,
XX-XXXX-XXXXXX-XXXXXXXX-XXXXXX-XXXX-X
1-2 BIOS Features
•supports Plug and Play V1.0A and DMI 2.0
•supports Intel PCI 2.1 (Peripheral Component Interconnect)
local bus specification
•supports EDO (Extended Data Out), ECC and FPM DRAM
•supports ECC (Error Checking and Correction)
•supports Flash ROM
AMIBIOS supports the LS120 drive made by Matsushita-Kotobuki
Electronics Industries Ltd. The LS120:
•can be used as a boot device
•is accessible as the next available floppy drive
AMIBIOS supports the National Semiconductor LM75 and LM78
data acquisition chips. When a failure occurs in a monitored
activity, AMIBIOS can sound an alarm and display a message.
The LM75 and LM78 chips monitor:
•CPU temperature
•additional temperature sensors

Chapter 1: AMI BIOS
1-3
•chassis intrusion detector input
•watchdog comparison of all monitored values
•POST code storage RAM
•ISA and I2C serial bus interfaces
•up to five positive voltage inputs
•up to two negative voltage inputs
•up to three fan speed monitoring inputs
BIOS Configuration Summary Screen
AMIBIOS displays a screen that looks similar to the following
when the POST routines complete successfully.
AMIBIOS System Configuration (C) 1985-1994 American Megatrends Inc.,
Main Processor : Pentium(tm) II Base Memory Size : 640 KB
Math Processor : Built-In Ext. Memory Size : 31744 KB
Floppy Drive A: : 1.2 MB, 5¼ Display Type : VGA/EGA
Floppy Drive B: : 1.44 MB, 3½ Serial Port(s) : 3F8,2F8
AMI-BIOS Date : 7/15/95 Parallel Port(s) : 378
Processor Clock : 200MHz Power Management : APM, SMI
AMIBIOS Setup
See the following page for examples of the AMIBIOS Setup
screen, featuring options and settings. Figure 1-1 shows the
Standard option highlighted. To highlight other options, use the
arrow keys, or use the tab key to move to other option boxes.
Figure 1-2 shows the settings for the Standard setup. Settings
can be viewed by highlighting a desired option and pressing
<Enter>. Use the arrow keys to choose a setting. Note: Optimal
settings for all options can be set automatically. Go to the
Optimal icon in the default box and press <Enter>. Use the
arrow keys to highlight yes, then press <Enter>.

BIOS User's Manual
1-4
Figure 1-1. Standard Option Highlighted
Figure 1-2. Settings for Standard Option

Chapter 2: Running Setup
2-1
Chapter 2
Running Setup*
*Optimal and Fail-Safe default settings are bolded in text unless
otherwise noted.
The WinBIOS Setup options described in this section are selected
by choosing the appropriate high-level icon from the Standard Setup
screen. All displayed icons are described in this section, although
the screen display is often all you need to understand how to set
the option.
2-1 Setup
2-1-1 Standard Setup
Pri Master
Pri Slave
Sec Master
Sec Slave
Choose these icons to configure the hard disk drive. When you
click on an icon, the following parameters are listed: Type, LBA/
Large Mode, Block Mode, 32Bit Mode, and PIO Mode. All param-
eters relate to IDE drives except Type.
If the hard disk drive to be configured is an IDE drive, select the
appropriate drive icon, choose the Type parameter and select
Auto. The BIOS will automatically detect the IDE drive parameters
and display them. Click on the OK button to accept these param-
eters.
Click on LBA/Large Mode and choose On to enable support for
IDE drives with capacities greater than 528MB. Click on Block
Mode and choose On to support IDE drives that use Block Mode.
Click on 32Bit Mode and click on On to support IDE drives that
permit 32-bit accesses.
To configure an old MFM hard disk drive, you must know the drive
parameters (number of heads, number of cylinders, number of
sectors, the starting write precompensation cylinder, and drive
capacity). Select the hard disk drive type (1-46). Refer to table
below.