Micronics M4LI User Manual

M4Li PCI/ISA

System Board Manual

Document Number: 06-00249-05, Rev. 2B

221 Warren Ave., Fremont, CA 94539-7085

November 1995

Copyright Notices

Micronics Computers, Inc.

The information contained in the M4Li system board manual has been
carefully checked and is believed to be accurate. Micronics assumes no
responsibility for any inaccuracies that may be contained in this document.
Micronics makes no commitments to update or to keep the information in this
manual at a current level when changes are made to the product.

Micronics reserves the right to make improvements to this document and/or
product at any time and without notice.

All Rights Reserved. No part of this document may be photocopied, repro­duced, translated, or reduced to any medium or machine form without prior,
written consent from Micronics.

COPYRIGHT (C) 1995, Micronics Computers, Inc.

Portions of the Manual

Portions of this manual were copied (with permission) from Phoenix Tech­nologies, Ltd.

Trademarks

IBM is a registered trademark of International Business Machines. Microsoft,
Microsoft Word, Windows are registered trademarks of Microsoft Corpora­tion. Intel and PCI are registered trademarks of Intel Corporation. UNIX is a
registered trademark of AT&T Corporation. Lotus 1-2-3 is a registered
trademark of Lotus Development Corp. All other product names mentioned
herein are used for identification purposes only and may be the trademarks of
their respective companies.

ii

Micronics Quick Installation

We know that many experienced people prefer to read as little of the documen­tation as possible. If this sounds like you, here’s the short form:

1. Ground yourself to prevent damaging static discharge, then remove the
M4Li from its packaging.

2. Configure and verify the system board’s jumper settings. (See Jumper
Settings in Chapter 2)

3. Install the CPU and the system memory (Chapter 3).

4. Install the motherboard into the system case and make all necessary
case connections.

5. Install any peripherals (Chapter 3).

6. Turn the computer on and press the <F2> key when you see the screen
below:

7. Set the time and date. Adjust the BIOS settings to match your
configuration. If installing an IDE drive, select the IDE device you wish

iii

to configure. Press <Enter> with Autotype Fixed Disk selected and the
BIOS will automatically configure the drive for you. (See Chapter 4)

8. After you have configured the Main Setup menu, make any desired
setting configurations in the Advanced and Security menu. When
finished, go to the exit screen, select “Save Changes and Exit,” and you
are finished with the BIOS configuration (Chapter 4).

iv

Contents

Introduction ....................................................................... 1-1

Features..................................................................................... 1-2

Software Compatibility ............................................................ 1-2

Configuring the M4Li ........................................................ 2-1

Static Electricity ....................................................................... 2-1

Office Environment .................................................................. 2-1

M4Li Components.................................................................... 2-2

CPU Voltage ............................................................................. 2-3

Jumper Settings......................................................................... 2-4

Installing the M4Li, System Memor y, CPUs, and

Peripherals......................................................................... 3-1

Installation of the M4Li............................................................ 3-2

Tools Required ....................................................................................... 3-2

Equipment Required............................................................................... 3-2

System Memory........................................................................ 3-3

SIMMs Supported .................................................................................. 3-3

Memory Configurations ......................................................................... 3-4

Installing the SIMMs.............................................................................. 3-5

Removing SIMMs .................................................................................. 3-5

Installing a CPU........................................................................ 3-6

Installing 128K of Cache Memory ........................................... 3-7

Installing 256K of Cache Memory ........................................... 3-8

Installing the M4Li IDE Drivers .............................................. 3-9

Installing a PCI Peripheral Card............................................. 3-10

Installing an ISA Peripheral Card............................................3-11

The BIOS Setup Utility ...................................................... 4-1

Configuration............................................................................ 4-1

Initial Boot Up.......................................................................... 4-1

Setup ......................................................................................... 4-2

Running the Setup Procedure ................................................... 4-3

v

Setting the Main Screen............................................................ 4-3

System Time and Date............................................................................ 4-3

Diskette A or B....................................................................................... 4-4

IDE Adapters (Hard Disk Setup) ........................................................... 4-4

Video System.......................................................................................... 4-6

Video BIOS ............................................................................................ 4-6

System BIOS .......................................................................................... 4-6

Boot Options Submenu .......................................................................... 4-6

Cache ...................................................................................................... 4-7

System Memory ..................................................................................... 4-7

Extended Memory .................................................................................. 4-7

Setting the Advanced Screen.................................................... 4-8

Integrated Peripherals Submenu ............................................................ 4-9

Plug and Play O/S ................................................................................ 4-10

Reset Configuration Data ..................................................................... 4-10

Large Disk Access Mode...................................................................... 4-10

Security Screen......................................................................................4-11

Supervisor Password is .........................................................................4-11

User Password is ...................................................................................4-11

Set Supervisor Password .......................................................................4-11

Set User Password ................................................................................ 4-12

Password on Boot................................................................................. 4-12

Diskette Access .................................................................................... 4-13

Fixed Disk Boot Sector ........................................................................ 4-13

Power Screen .......................................................................... 4-14

APM ..................................................................................................... 4-14

Power Management Mode ................................................................... 4-14

Standby Timeout .................................................................................. 4-14

Suspend Timeout.................................................................................. 4-15

Standby CPU Speed ............................................................................. 4-15

Fixed Disk Timeout.............................................................................. 4-15

CRT Standby ........................................................................................ 4-15

Exit Screen.............................................................................. 4-16

POST Messages ............................................................... A-1

Beep and POST Codes .................................................... B-1

Hard Disk Drive Types ..................................................... C-1

vi

Specifications................................................................... D-1

Environmental Specifications...................................................D-2

Temperature Range.................................................................................D-2

Relative Humidity ..................................................................................D-2

Battery Disposal .......................................................................D-3

Installing a Power Module ................................................E- 1

FCC Warning Statement ........................................................... F-1

Glossary............................................................................ G-1

Limited Warranty ..............................................................W-1

Non-W arranty Service .............................................................W-2

vii

List of Figures

Figure 2-1: M4Li System Board .................................................................. 2-2

Figure 2-2: CPU Selection ........................................................................... 2-4

Figure 3-1: Installing a 72-Pin SIMM.......................................................... 3-5

Figure 3-2: Installing a CPU ........................................................................ 3-6

Figure 3-3: Installing 128K External Cache ................................................ 3-7

Figure 3-4: Installing 256K External Cache ................................................ 3-8

Figure 3-5: M4Li IDE Drivers Screen .......................................................... 3-9

Figure 3-6: Installing an PCI Card ............................................................. 3-10

Figure 3-7: Installing an ISA Card ..............................................................3-11

Figure 4-1: Power-Up Screen....................................................................... 4-2

Figure 4-2: CMOS Main Screen .................................................................. 4-3

Figure 4-3: IDE Device Submenu ................................................................ 4-4

Figure 4-4: Boot Options Submenu ............................................................. 4-6

Figure 4-5: Advanced Screen ....................................................................... 4-8

Figure 4-6: Integrated Peripherals Submenu................................................ 4-9

Figure 4-7: Security Setup Screen...............................................................4-11

Figure 4-8: Supervisor Password Screen ................................................... 4-12

Figure 4-9: Power Screen ........................................................................... 4-14

Figure 4-9: Exit Screen............................................................................... 4-16

List of Tables

Table 2-1: CPU Voltage Requirements......................................................... 2-3

Table 2-2: CPU Speed Selection .................................................................. 2-5

Table 2-3: PCI Clock Selection.................................................................... 2 -5

Table 2-4: Cache Size Selection................................................................... 2-5

Table 2-5: Parallel Port IRQ Selection......................................................... 2-5

Table 2-6: Parallel Port Configuration ......................................................... 2-6

Table 2-7: Reserved Jumper Settings ........................................................... 2-6

Table 2-8: Case and Peripheral Connections................................................ 2-7

Table 3-1: Common Memory Configurations.............................................. 3-4

viii

Addendum 2

1. Contents page v: Delete line 3-9.

2. Contents page viii: Delete figures 3-6 and 3-7.

3. Page 1-2: Line “L2 Write-back cache support (0K, 128K, 256K, or

512K)” should be “L2 Write-back cache support (0K, 128K, or 256K)”.

4. Page 2-2: Replace Figure 2-1 M4Li System Board with page 2 of this

addendum.

5. Page 2-5: Delete 512K cache jumper setting from Table 2-4.

6. Page 2-6: Change default setting for Jumper W28 (Table 2-6) from 1-2 to

2-3. Change default setting for Jumper W29 (Table 2-6) from 1-2 to 2-3.

7. Page 2-6: Change default setting for Jumper W33 to closed for both PS/2

and AT versions.

8. Page 3-9: Delete entire page.

M4Li Components

Figure 2-1 M4Li System Board

Note:
ISA Slot 4 and PCI Slot 1 are shared. Only one slot may be used at a time.

PCI slot 1 is not a bus-mastering slot.

Introduction

1

Congratulations for choosing the Micronics M4Li! The M4Li is a 486­based system board designed to be the foundation for advanced personal
computers or workstations.

The M4Li is an integrated system board featuring PCI Local Bus
architecture and a Mode 3 IDE controller. The PCI architecture pro­vides high performance for Graphical User Interfaces (GUIs) and
peripherals which perform high speed data transfers, such as disks and
multimedia.

The M4Li's advanced power management features makes it a "Green
Board" which means it adheres to the Environmental Protection
Agency's strict Energy Star efficiency guidelines. See Chapter 4 for
information and instructions on how to set up the "Green Section" of the
BIOS.

Micronics builds all products to exacting standards, using the highest
quality components available. We are proud to provide this system
board and hope it brings you years of reliable service.

Introduction

1-1

Micronics M4Li System Board Manual

Features

m SIS 496/497 chipset with an external level 2 cache controller.

m Mini-AT size system board (8.5" X 9.5").
m L2 Write-back cache support (0K, 128K, 256K, or 512K).
m Supports up to 128MB of on-board system memory.
m Three PCI, three 16-bit ISA, and one shared slot.
m PCI Mode 3 IDE controller (supports four drives).
m Floppy controller (2.88, 1.44MB, 1.2MB, 720K, and 360K floppy drives).
m Two high speed NS16550 compatible serial ports.
m Bi-directional parallel port which is EPP and ECP compatible.
m Upgradeable Phoenix Flash BIOS.
m Supports the following processors:

- 486SX, 25 or 33MHz

- 486SX2, 50MHz

- 486DX, 33MHz

- 486DX2, 50, 66, or 80MHz

- 486DX4, 75 or 100MHz (with optional power module)

Software Compatibility

The M4Li system board has been thoroughly tested for compatibility with a
variety of operating systems and environments, including:

m Windows, Windows NT, and Windows 95.
m OS/2.
m SCO UNIX and Open Desktop.
m Novell NetW are.
m MS-DOS and PC-DOS.

1-2

Configuring the M4Li

2

Although the M4Li system board is packaged in protective
materials, it is important to use care while unpacking and setting up.

Static Electricity

The M4Li is shipped from the factory in an antistatic bag. To reduce the
possibility of damage, it is important to neutralize any accumulated
static charges on your body before handling the board. The best way to
do this is to ground yourself using a special wrist or ankle strap. If you
do not have a strap, you should touch both of your hands to a safely
grounded object. After you have grounded yourself, ground the M4Li
via the solder pads surrounding one of its mounting holes.

Once the M4Li is removed from its packaging, place it on top of the
antistatic bag. Carefully inspect the board for damage which may have
occurred during shipment.

Jumper Settings

Office Environment

Make sure the finished computer system is in an area with good ventila­tion. The system should not be in direct sunlight, near heaters, or
exposed to moisture, dust, or dirt.

2-1

Micronics M4Li System Board Manual

M4Li Components

Figure 2-1 M4Li System Board

Note:
ISA Slot 4 and PCI Slot 1 are shared. Only one slot may be used at a time.

PCI slot 1 is not a bus-mastering slot.

2-2

Jumper Settings

CPU Voltage

Warning:
This system board has been factory set to support 5.0V processors. If using
a 3.3V, 3.45V, or 4.0V processor, you must install a Power Module (Appen­dix E). Failure to install a Power Module could result in damage to the
CPU.

Table 2-1 lists the voltage requirements for CPUs supported by this system
board.

CPU Manufacturer(s) Voltage
486SX Intel 5.0V

486DX Intel 5.0V
486DX2 Intel, TI 5.0V
486DX2 AMD 3.3V or 5.0V
486SL-series Intel 5.0V
Write-Back Enhanced 486DX2 Intel 5.0V
486DX4 Intel, AMD 3.3V
Write-Back Enhanced 486DX4 Intel 3.3V
Pentium OverDrive Intel 5.0V
Cyrix 486DX/DX2/DX4 Cyrix 5.0V
Cyrix 486DX2V-80 Cyrix 3.45V
Cyrix 5X86-100, 120 Cyrix 3.45V

Table 2-1 CPU Voltage Requirements

2-3

Micronics M4Li System Board Manual

Jumper Settings

The following diagram illustrates the W8 jumper settings to select the type of
CPU installed (Figure 2-2).

2-4

Figure 2-2 CPU Selection

Jumper Settings

Table 2-2 lists the jumper settings to select the external speed of the CPU.

Speed
Jumper

25MHz 33MHz

(default)

40MHz

W15 open closed open
W16 open closed closed

Table 2-2 CPU Speed Selection

Table 2-3 lists the jumper settings to set the speed of the PCI bus.

Jumper Function Setting

W20 PCI Clock = CPU Clock (d efau lt )

PCI Clock = 1/2 CPU Clock

Table 2-3 PCI Clock Speed Selection

1-2
2-3

Note:
If a 40MHz CPU is installed and the system is not stable, configure Jumper
W20 for pins 2-3.

Table 2-4 lists the jumper settings to select the size of the external cache.

Jumper

W23 W34 W35 W36 W39

Cache
0K open open open open open

128K open 1-2 1-2, 4-5 1-2 open
256K (one bank) closed 1-2 1-2, 3-4 2-3 open
256K (two banks) closed 2-3 2-3, 4-5 2-3 open
512K (one bank) closed 1-2 1-2, 4-5 1-2 closed
512K (two banks) closed 2-3 2-3, 4-5 2-3 closed

Table 2-4 Cache Size Selection

2-5

Micronics M4Li System Board Manual

Table 2-5 lists the jumper settings to configure the parallel port for Plug and
Play.

Jumper

W28 W29

DMA Channel
Channel 3 (default) 2-3 2-3

Channel 1 1.2 1.2

Table 2-5 Parallel Port Configuration

Table 2-6 lists the jumper settings to reset the BIOS. With the computer’s
power off, short Jumper W40 for about five seconds and place the jumper
back in the open position. The jumper must be placed back into the open

position for the system to function properly.

Jumper Function Setting

W40 Normal (default)

Clear CMOS RAM s ett ing s

Table 2-6 BIOS Reset Jumper

open

closed

Note:
This will reset all BIOS settings to their defaults. Any changes you have made
will be lost.

Table 2-7 lists jumpers with factory reserved settings. Do not reconfigure
these jumpers.

2-6

Jumper Function Setti ng

W19 Reserved 2-3
W33 Reserved closed

Table 2-7 Reserved Jumper Settings

Jumper Settings

Table 2-8 lists the jumper settings for case and peripheral connections.

Jumper Function Notes

J20 Primary PCI IDE

Connector

J25 Secondary PCI IDE

Connector

Can be disabled in
CMOS.
Can be disabled in

CMOS.
J36 Floppy Connector
J39 Parallel Port Connector Can be disabled in

CMOS.
J37 Serial Port (Com 1) Can be disabled in

CMOS.
J38 Serial Port (Com 2) Can be disabled in

CMOS.

J12 & J13 PS/2 Keyboard & Mouse PS/2 Version

J15 AT Keyboard AT Version
J10 External Mouse AT Version
J26 Power Supply Connector
J31 Speaker Connector 1- Speaker; 2-N/C; 3-

Ground; 4-5V DC

J3 Turbo LED 1-5V DC; 2- Gro und

J2 Turbo Switch
J23 Reset
J21 HD LED 1-5V DC; 2- Gro und

J9 Keylock/ Power LED 1-Power; 2-N/C; 3-

Ground; 4-5V DC

J4 Power Module Connector See Appendix E

Table 2-8 Case and Peripheral Connections

2-7

Micronics M4Li System Board Manual

2-8

Installing System Memory and Peripherals

Installing the M4Li, System
Memory, CPUs, and

3

Peripherals

This section explains how to install the M4Li system board, SIMMs,
CPUs, and peripherals.

Warning:
Before installing or removing any peripherals or components, make
sure you have a clear work space and that you adhere to all anti-static
precautions described on page 2-1. Micronics recommends that only
trained technicians operate on the system board. Damage which
occurs to the board while adding or removing peripherals or compo­nents may void the warranty.

If problems arise while installing peripherals, contact the computer
outlet where you purchased the peripheral or Micronics’ Technical
Support Department.

3-1

Micronics M4Li System Board Manual

Installation of the M4Li

The installation of the M4Li system board depends on the type of case you
use. The M4Li is a Mini AT system board and can be installed in most cases.

Prior to installing the M4Li, make sure you have a clear work space available
and adhere to all anti-static precautions.

If you are unfamiliar with installing a system board, Micronics highly recom­mends you read the computer user’s manual or contact your dealer’s technical
support department.

Tools Required

Micronics recommends using the following tools to install the M4Li:

m Small Phillips screwdriver.

m Tweezers or a pair of needle-nose pliers.

m Tray (to hold loose screws).

Equipment Required

Micronics recommends using the following equipment with the M4Li for a
typical configuration:

m Chassis with standard hardware.

m A high quality power supply capable of providing continuous power

within a 5 volt range, plus or minus 5% (eg., 4.75 to 5.25). A power filter
may be used for a noisy AC power source.

m AT style keyboard and mouse (AT version).

m PS/2 style keyboard and mouse (PS/2 version).

m Eight ohm speaker.

m Standard ribbon cables for internal connections.

m Standard power cord (grounded).

m CPU heat sink.

3-2

Installing System Memory and Peripherals

System Memory

System memory devices, commonly known as SIMMs (Single Inline Memory
Modules) are necessary to operate the M4Li system board. The M4Li has four
SIMM sockets and can be upgraded to 128 Megabytes of RAM. This section
will explain the type of SIMMs supported, list the memory configurations
supported, and show how to physically install the new SIMMs.

SIMMs Supported

The M4Li supports the following 72 pin, 60 or 70ns SIMMs:

4MB (1Mx36 or 1Mx32)
8MB (2Mx36 or 2Mx32)
16MB (4Mx36 or 4Mx32)
32MB (8Mx36 or 8Mx32)

Note:
For long term reliability, Micronics recommends using SIMMs with tin-plated
contacts. The use of gold-plated contacts may conflict with the tin alloy of the
SIMM socket.

3-3

Micronics M4Li System Board Manual

Memory Configurations

The following table (Table 3-1) lists the most common memory configurations
supported.

Memory Bank 0 Bank 1 Bank 2 Bank 3

4MB 1MBx36
8MB 2MBx36

8MB 1MBx36 1MBx36
12MB 1MBx36 1MBx36 1MBx36
16MB 1MBx36 1MBx36 1MBx36 1MBx36
16MB 4MBx36
16MB 2MBx36 2MBx36
24MB 2MBx36 2MBx36 2MBx36
24MB 2MBx36 2MBx36 1MBx36 1MBx36
32MB 8MBx36
32MB 4MBx36 4MBx36
32MB 2MBx36 2MBx36 2MBx36 2MBx36
40MB 4MBx36 4MBx36 1MBx36 1MBx36
48MB 4MBx36 4MBx36 2MBx36 2MBx36
48MB 4MBx36 4MBx36 4MBx36
64MB 8MBx36 8MBx36
64MB 4MBx36 4MBx36 4MBx36 4MBx36
72MB 8MBx36 8MBx36 1MBx36 1MBx36
80MB 8MBx36 8MBx36 2MBx36 2MBx36
96MB 8MBx36 8MBx36 8MBx36
96MB 8MBx36 8MBx36 4MBx36 4MBx36

128MB 8MBx36 8MBx36 8MBx36 8MBx36

3-4

Table 3-1 Common Memor y Configurations

Installing System Memory and Peripherals

Installing the SIMMs

To install the SIMMs, locate the SIMM sockets on the system board.

Start with bank 0 and perform the following steps to install the SIMMs:

1. Hold the SIMM so that the notched edge is aligned with the notch on the
SIMM socket (Figure 3-1).

2. Insert the SIMM at a 45 degree angle.

3. Gently push the SIMM into an upright position until it locks into place
(past the release tabs).

Figure 3-1 Installing a 72-Pin SIMM

4. After you have installed the SIMMs, the BIOS will automatically config­ure the memory size. You do not need to configure any jumpers.

Removing SIMMs

Perform the following steps to remove SIMMs, if necessary:

1. With both thumbs (or fingers), press the release tabs away from the
socket.

2. With the SIMM free from the release tabs, lift the module up and place in
an anti-static bag or package.

3-5

Micronics M4Li System Board Manual

Installing a CPU

The M4Li is specifically designed to support a large variety of CPU’s from
Intel, AMD, and Cyrix. To install an upgrade processor, perform the follow­ing steps:

1. Power off the system and locate the M4Li’s ZIF socket (Figure 3-2).

2. Lift the lever of the socket.

3. Insert the new processor into the socket. Make sure pin 1 on the CPU
lines up with pin 1 on the socket. Refer to Figure 3-2 for pin 1 location.

4. Push the lever down to its original position.

5. Configure the board using the tables in Chapter 2.

The new CPU is now ready to operate. The system board detects the installed
CPU after it is inserted and configured.

Figure 3-2 Installing a CPU

Warning:
If the new processor includes a heat sink or cooling fan, be certain to install
the device according to the manufacturer’s instructions. Failure to provide
adequate cooling of the processor may seriously affect system performance
or cause permanent damage.

3-6

Installing System Memory and Peripherals

Installing 128K of Cache Memory

To upgrade to 128K cache, carefully install five 32Kx8-15ns SRAMs into
SRAM sockets U8, U9, U10, U11, and U16 on the lower right-hand corner of
the system board (Figure 3-3). After installing the cache upgrade, refer to
Table 2-4 for the correct external cache jumper settings.

Figure 3-3 Installing 128K External Cache

3-7

Micronics M4Li System Board Manual

Installing 256K of Cache Memory

To upgrade to 256K cache, carefully install four 64Kx8-15ns SRAMs into
sockets U8, U9, U10, and U11 and one 32Kx8-15ns SRAM into socket U12
(Figure 3-4). After installing the cache upgrade, refer to Table 2-4 for the
correct external cache jumper settings.

Figure 3-4 Installing 256K of Cache Memory (1 Bank)

Or, install one 32Kx8-15ns SRAM into each of the M4Li SRAM sockets
(Figure 3-5).

Figure 3-5 Installing 256K of Cache Memory (2 Banks)

3-8

Installing System Memory and Peripherals

Installing 512K of Cache Memory

To upgrade to 512K cache, carefully install four 128Kx8-15ns SRAMs into
sockets U8, U9, U10, and U11 and one 32Kx8-15ns SRAM into socket U12
(Figure 3-6). After installing the cache upgrade, refer to Table 2-4 for the
correct external cache jumper settings.

Figure 3-6 Installing 512K of Cache Memory (1 Bank)

Or, install eight 64Kx8-15ns SRAMs into sockets U8 through U15 and one
32Kx8-15ns SRAM into socket U16 (Figure 3-7).

Figure 3-7 Installing 512K of Cache Memory (2 Banks)

3-9

Micronics M4Li System Board Manual

Installing the M4Li IDE Drivers

The M4Li IDE drivers are optional drivers that enhance the performance of
Mode 3 IDE hard drives.

After you have physically installed an IDE hard drive in your system, locate
the README.NOW file on the IDE Drivers diskette and open it as a text file
in any word processor. It contains up to date information on whether or not
you will need to install the drivers. If you require these drivers, print the
README.NOW file.

To install the drivers, follow the instructions below:

1. Insert the IDE Drivers diskette into Drive A: and type A:INSTALL.

2. Select Install Driver. Choose the drivers for the operating systems and
environments you will be using (Figure 3-8).

Figure 3-8 M4Li IDE Driver Screen

3. The drivers will automatically be installed for DOS and Windows. For
other operating systems, you will receive detailed installation instructions.

4. Exit the utility and reboot the system. The drivers are now installed.

3-10

Installing System Memory and Peripherals

Installing a PCI Peripheral Card

Micronics PCI slots accommodate all PCI peripherals which adhere to the PCI

2.0 specifications. Complete the following steps to install a PCI card:

1. Turn the computer system off and remove its cover.

2. Choose an unused PCI slot and remove the slot cover.

3. Insert the card with the bottom edge level to the slot. Never insertthe

card at an angle!

4. Carefully push the card straight down, making sure the card is fully
inserted.

5. Replace the screw which holds the card into place.

6. Replace the computer cover.

7. Read the card’s manual for additional instructions concerning installation
and software drivers.

Figure 3-9 Installing a PCI Card

3-11

Micronics M4Li System Board Manual

Installing an ISA Peripheral Card

Micronics ISA slots accommodate all standard ISA peripherals. Complete the
following steps to install an ISA card:

1. Turn the computer system off and remove its cover.

2. Choose an unused ISA slot and remove the slot cover.

3. Insert the card with the bottom edge level to the slot. Never insertthe

card at an angle!

4. Carefully push the card straight down, making sure the card is fully
inserted.

5. Replace the screw which holds the card into place.

6. Replace the computer cover.

7. Read the card’s manual for additional instructions concerning installation
and software drivers.

3-12

Figure 3-10 Installing an ISA Card

The BIOS Setup Utility

4The BIOS Setup Utility

Configuration

After the M4Li system board and all hardware is installed, the system is
ready for configuration. Before turning on the computer, make sure all
cables are correctly connected and all jumpers are correctly set.

It is recommended you keep the computer cover off the first time you
boot the system. If you have any difficulties, they will be easier to
correct.

Initial Boot Up

Power up the M4Li. If the system doesn’t properly boot, check all your
cables and peripherals for bad connections. You may also get beep
codes or error messages. If this occurs, consult Appendices A and/or B
for a guide to possible solutions.

After the system properly boots, it is ready to be configured. The
following pages explain the proper procedures for BIOS configuration.

4-1

Micronics M4Li System Board Manual

Setup

The Setup program is used to configure the computer’s BIOS (Basic Input/
Output System). The computer’s BIOS is responsible for configuring the
system board and providing hardware information to the operating system. In
order for the computer to run properly, run the Setup procedure after first
installing the system board and whenever you make a hardware change to the
system.

After the system is turned on and goes through a memory test, the Power-Up
Screen (Figure 4-1) will appear on your monitor:

Figure 4-1 Power-Up Screen

When “Press <F2> to enter SETUP” appears at the bottom of the screen, press
the <F2> key to begin the Setup procedure. The CMOS Main Screen (Figure
4-2) should appear and the prompt should be on the time line. The Setup
procedure can only be activated during the boot sequence.

4-2

The BIOS Setup Utility

Running the Setup Procedure

The M4Li system board has four primary CMOS configuration screens: the
Main Screen (Figure 4-2), the Advanced Screen (Figure 4-8), the Security
Screen (Figure 4-10), and the Exit Screen (Figure 4-12). To toggle between
the screens, press the right arrow <→> and the left arrow < ←> keys.

Setting the Main Screen

The CMOS Main Screen (Figure 4-2) is used to set the time and date, to set
the floppy drive types, to configure the hard disks, and to configure the video.
This section explains how to configure each of these categories. To move
between the categories, use the up arrow <↑> and the down arrow <↓>.

Figure 4-2 CMOS Main Screen

System Time and Date

To set the time, use the <-> key to decrease the number and the <+> key to
increase the number. To move the prompt forward, use the <Tab> key; to
move the prompt backward, use the <Shift-Tab> key. To set the date, use the

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Micronics M4Li System Board Manual

up and down arrows<↑/↓> to highlight the System Date and follow the same
procedure used to set the time.

Diskette A or B

To configure a floppy drive added to or removed from your computer, use the
up and down arrow keys <↑/↓> to select the drive you wish to set. Use the
<+/-> keys to change the setting until it matches the floppy drive you have
installed. The BIOS supports 2.88MB, 1.44MB, 1.2MB, 720KB, and 360KB
floppy drives.

IDE Adapters (Hard Disk Setup)

If you are setting up a SCSI hard disk, you will need to select None in the IDE
Device parameters (see your SCSI card manual for more details).

To install an IDE device, select the device you wish to configure and press
<Enter>. An IDE Device submenu will appear. (Figure 4-3).

Figure 4-3 IDE Device Submenu

Autotype Fixed Disk

The easiest way to set your IDE devices is to let the BIOS do it for you. When
the IDE Device submenu first appears, the Autotype Fixed Disk selection will

4-4

The BIOS Setup Utility

be highlighted. Simply press <Enter>, and the remaining information will
automatically be entered.

Do not adjust the rest of the settings unless absolutely necessary. The BIOS
will automatically enter the correct settings.

Type

This category selects the drive type installed in the system. The options are 1­39, User, and none. It is doubtful you will find your drive in 1-39.

If Autotype Fixed Disk does not find your drive’s parameters, you will need to
fill this information in manually under the User category. This information
may be in the manual that came with your system. If not, contact your dealer
or the hard drive manufacturer to fill in this category.

If you are using a SCSI hard drive, select None and refer the documentation
which came with the SCSI adapter.

Multiple-Sector T ransfers

This category determines the number of sectors per block for multiple sector
transfers. The options are Disabled (default), 2 Sectors, 4 Sectors, 8 Sectors,
and 16 Sectors. If you used Autotype Fixed Disk, this section will automati­cally be filled in.

LBA Mode Control

Enable LBA (Logical Block Addressing) to support IDE drives larger than
528MB in size. The default setting is Disabled.

32-Bit I/O

This category allows the user to enable the 32-bit I/O function of the PCI IDE
controller. Select Disabled if your drive will not run at this speed. The default
setting is Enabled.

T ransfer Mode

This category provides the transfer modes for the PCI IDE controller. The
options are Fast PIO 3, Fast PIO 2, Fast PIO 1, and Standard (default).

Fast PIO 3 is equivalent to Mode 3 supporting a minimum cycle time of 180ns
(11.1 MB/sec.). Fast PIO 2 supports a minimum cycle time of 240ns (8.33
MB/sec.). Fast PIO 1 supports a minimum cycle time of 383ns (5.22 MB/
sec.). Standard supports a minimum cycle time of 600ns (3.3 MB/sec.).

See your drive specifications before setting this category.

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Micronics M4Li System Board Manual

Video System

This sets the type of video board installed into the system. You may choose
from: EGA/VGA (default), CGA 80x25, MONO, and Not Installed.

Video BIOS

The Video BIOS category allows you to Shadow or Shadow & Cache the
video BIOS. Choosing Shadowed copies the video BIOS into RAM for faster
execution. Choosing Shadowed & Cached caches the shadowed video BIOS
for even higher performance. To disable the Video BIOS category, select
Disabled.

System BIOS

The System BIOS Option allows you to Shadow or Shadow & Cache the
System BIOS Shadow on the system board. Choosing Shadowed copies the
system’s BIOS into RAM for faster execution. Choosing Shadowed & Cached
caches the shadowed BIOS for even higher performance. To disable the
System BIOS category , select Disabled.

Boot Options Submenu

Move the prompt to Boot Sequence and press <Enter>. The following screen
(Figure 4-4) will appear.

4-6

Figure 4-4 Boot Options Submenu

The BIOS Setup Utility

Boot Sequence

This category selects the order the system searches for a boot disk and can be
set for:
A: then C:
C: then A:
C: only (System never attempts booting from floppy.)

SETUP Prompt

When enabled, this category allows the system to display the “Press <F2> to
enter SETUP” message during boot.

Post Errors

When enabled, this category allows the system to display the “Press <F1> to
resume, <F2> to SETUP” message if errors occur during boot. If disabled,
the system will ignore any errors and will always attempt to boot.

Floppy Check

When enabled, this category verifies the floppy drive is installed while the
system is booting. For faster booting, select DISABLED.

Numlock

Setting this to On will activate Numlock upon boot. Setting this to Auto will
activate Numlock if the BIOS detects a numeric keyboard. It may also be set
to Off.

Cache

This category allows you to enable the external cache. For optimal perfor­mance, select Enabled.

System Memory

The System Memory category identifies the size of the base memory. It
cannot be changed.

Extended Memory

The Extended Memory category automatically detects the amount of memory
installed above the amount in the System Memory category. Because the
BIOS automatically calculates the amount of memory installed in your system,
you cannot change this category without adding or removing memory.

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Micronics M4Li System Board Manual

Setting the Advanced Screen

To move to the Advanced Screen, use the left and right arrow keys <←/→>
keys until you see the screen below (Figure 4-5).

4-8

Figure 4-5 Advanced Screen

The BIOS Setup Utility

Integrated Peripherals Submenu

The Integrated Peripherals submenu (Figure 4-6) allows you to individually
enable or modify the disk controllers, I/O ports, and other settings. Use the up
and down arrow keys <↑/↓> to select a category and the plus and minus keys
<+/-> to change the settings.

Figure 4-6 Integrated Peripherals Submenu

Serial Port A

Serial Port A may be set for Auto (default), COM1, COM2, COM3, COM4,
or may be disabled.

Serial Port B

Serial Port B may be set for Auto (default), COM1, COM2, COM3, COM4,
or may be disabled.

Parallel Port

The parallel port may be set for Auto (default), LPT1, LPT2, or may be
disabled.

Parallel Port Mode

The parallel port may be set for output mode (AT) (default), bidirectional
mode (PS/2), Enhanced Capabilities Port mode (ECP), or may be disabled.

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Micronics M4Li System Board Manual

Diskette Controller

The on board floppy disk controller may be enabled or disabled.

PCI IDE Adapter

The on board PCI IDE controller may be set for Primary (up to two hard
disks), Both (up to four hard disks), or it may be disabled.

Plug and Play O/S

This category, when set to Yes, allows the system to work with a Plug and Play
operating system such as Windows 95. The default setting is No.

Reset Configuration Data

Select Yes if you want to clear the system configuration data. The default
setting is No.

Large Disk Access Mode

If you are using a DOS operating system (MS-DOS, DR-DOS, or PC-DOS),
set this to DOS. If you are using anything else, set this to OTHER.

4-10

The BIOS Setup Utility

Security Screen

The Security Screen (Figure 4-7) controls access to the computer. The
security screen allows for settings of two passwords. The Supervisor Pass­word allows access to the system and Setup. The User Password will allow
access to the system, but not to all Setup features.

Figure 4-7 Security Setup Screen

Supervisor Password is

If a Supervisor Password has been set up for the system, it will read “Supervi­sor Password is ENABLED.” If the password has not been set up, it will be
disabled (default).

User Password is

If a User Password has been set up for the system, it will read “User Password
is ENABLED.” If the password has not been set up, it will be disabled
(default).

Set Supervisor Password

Press the <Enter> key to enter the Supervisor Password submenu (Figure 4-8).

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Micronics M4Li System Board Manual

Figure 4-8 Supervisor Password Submenu

Type the password and press the <Enter> key. Retype the password and press
the <Enter> key again. Write down the password somewhere safe so it will
not be forgotten. The password may be disabled by setting the new password
to nothing (pressing the <Enter> key without first typing a password).

Warning:
If you forget the Supervisor Password, it cannot be disabled without dis­charging the CMOS.

Set User Password

Follow the same procedure used to set the Supervisor Password.

Note:
When a password has been entered, it is saved immediately. All other changes
may still be discarded (see Exit Scr een).

Password on Boot

When enabled, the system will require a password to be entered upon boot.
Either the Supervisor or User Password may be entered.

4-12

The BIOS Setup Utility

Diskette Access

This category allows floppy disk access with an option of the supervisor or
user. Selecting Supervisor will give floppy disk access to the supervisor only.
Selecting User (default) will give floppy disk access to both the user and the
supervisor. If the passwords are enabled, this option may only be changed by
the supervisor.

Fixed Disk Boot Sector

This category allows the boot sector of the fixed disk to be write protected.
The default setting is Normal. When set for Write Protect, it serves as a form
of virus protection. If the passwords are enabled, this option may only be
changed by the supervisor.

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Micronics M4Li System Board Manual

Power Screen

The Power Screen controls the power management functions or the “Green
Section” of the system. To move to the Advanced Screen, use the left and
right arrow keys <←/→> keys until you see the screen below (Figure 4-9) .

Figure 4-9 Power Screen

APM

When enabled the power management features are active. The default setting
is Disabled. If you enable this category, you must also set the other power
management options below.

Power Management Mode

This category may be set for Maximum Power Savings, Medium Power
Savings, Minimum Power Savings, Customized, or Disabled (default). If you
set this category for Maximum, Medium, or Minimum power savings, you do
not need to make any more adjustments. If you select Customized, you must
set the following five categories.

Standby Timeout

The Standby Timeout category is used to set the amount of time that must
elapse for the system to enter the power saving mode. The options are

4-14

The BIOS Setup Utility

Disabled (default), 1 min., 15 min., 30 min., 45 min., 60 min., 2 Hr., 3 Hr., or
4 Hr.. Before making changes, “Customized” must be selected in the Power
Management Mode category.

Suspend Timeout

The Suspend Timeout category is used to set the amount of time that must
elapse after the Standby Timer is activated. The options are Disabled (de­fault), 1 min., 15 min., 30 min., 45 min., 60 min., 2 Hr., 3 Hr., and 4 Hr..
Before making changes, “Customized” must be selected in the Power Manage­ment Mode category.

Standby CPU Speed

This category is used to set the CPU speed during power saving mode. The
options are Maximum, Medium, Minimum, and Slowest (default). Before
making changes, “Customized” must be selected in the Power Management
Mode category.

Fixed Disk Timeout

This category is used to set the amount of time which must elapse before the
IDE drive enters spin-down mode to conserve power. The options are
Disabled (default), 1 min., 2 min., 5 min., 10 min., or 15 min. Before making
changes, “Customized” must be selected in the Power Management Mode
category.

Note:
Do not enable this category unless your IDE drive supports spin-down mode.

CRT Standby

Selecting Enabled will power down the display while the system is in power
saving mode. The default setting is disabled. Before making changes,
“Customized” must be selected in the Power Management Mode category.

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Micronics M4Li System Board Manual

Exit Screen

After you have completed configuring the BIOS, select the Exit Screen
(Figure 4-10).

Figure 4-10 Exit Screen

Choose “Save Changes and Exit” and reboot the computer. The computer is
ready for use.

4-16

POST Messages

A

The following table lists the Power On Self Test (POST) messages,
possible causes, and solutions.

Message Possible Cause Solution

DISKETTE DRIVE A
FAILURE

DISKETTE DRIVE B
FAILURE

EXTENDED RAM
FAILED AT
OFFSET: nnnn

FAILING BITS: nnnn

Drive A failed or is
missing.

Drive B failed or is
missing.

Extended memory not
working or configured
properly.

Memory failure in
System, Extended, or
Shadow memory.

Check Setup and cable
connections.

Check Setup and cable
connections.

Replace defective
memory.

Replace defective
memory.

POST Messages

FIXED DISK X
FAILURE (where X
=0 or 1)

FIXED DISK
CONTROLLER
FAILURE

INCORRECT DRI VE
A TYPE

INCORRECT DRI VE
B TYPE

INVAL ID NVRAM
MEDIA TYPE

KEYBOARD
ERROR, or
KEYBOARD
CONTROLLER
ERROR

KEYBOARD
ERROR nn

KEYBOARD
LOCKED

The hard disk is not
configured or working
properly.

The controller card has
failed.

Floppy drive A: not set
correctly in Setup.

Floppy drive A: not set
correctly in Setup.

NVRAM chip is bad. Requires repair of system

The keyboard or
keyboard controller
failed.

A key is jammed or was
held down during boot.

Keyswitch on the front of
the case is locked.

Rerun SETUP and check
connections, or replace
hard disk.

Check configuration and
connections, or replace
controller card.

Run Setup.

Run Setup.

board.
Check connections. You

may have to replace the
keyboard or controller.

Make sure the keys are
not jammed or dirty.

Unlock the keyswitch.

A-1

Micronics M4Li System Board Manual

Message Possible Cause Solution

MONITOR TYPE
DOES NOT MATCH
CMOS

Monitor type not
correctly identified in
Setup.

Run Setup and enter
correct monitor type.

OPERATING
SYSTEM NOT
FOUND

PARITY CHECK 1
nnnn

PARITY CHECK 2
nnnn

PREVIOUS BOOT
INCOMPLETE ­DEFAULT
CONFIGURATION
USED

REAL TIME CLOCK
ERROR

SHADOW RAM
FAILED AT OFFSET

SYSTEM BATTERY
IS DEAD

Operating system
cannot be located on
Drive C: or Drive A:

Check Setup to see if
Drive A: and C: are
properly configured, or
put a bootable disk in
Drive A:

Parity error found in the
system bus.

Parity error found in the
I/O bus.

Previous POST did not
complete successfu ll y.

Check Setup. Board
repair may be required.

Check Setup. Board
repair may be required.

Run Setup, load default
BIOS settings, make any
necessary adjustments,
and save the changes

Real-time clock failed
BIOS test.

May require battery
replacement or board
repair.

Shadow RAM failed. May require repair of

system board.

System battery died. Replace the system

battery and run Setup to
reconfigure the system.

SYSTEM CACHE
ERROR - CACHE
DISABLED

SYSTEM CMOS
CHECKSUM BAD ­RUN SETUP

SYSTEM RAM
FAILED AT
OFFSET: nnnn

SYSTEM TIMER
ERROR

A-2

External (L2) cache
failed BIOS test.

System will still run, but
slower. Replace cache
at convenience.

System CMOS has been
corrupted or modified

Run Setup and
reconfigure the system.

incorrectly.
System RAM failed. Replace defective RAM.

Timer test failed. Requires repair of system

board.

Beep and POST Codes

Beep and POST Codes

B

Beep codes are a series of beeps sent through the speaker which indicate
a problem during the Power On Self Test (POST). If text appears on the
video screen, the M4LI has completed POST; any other tone from the
speaker indicates something other than a POST error. These tones are
not described in Table B-1.

The beep error codes are a series of beeps. The duration of the beep
tones are constant, but the length of the pauses between the beeps varies.
For example: a 1-3-3 beep code will sound like one beep, a pause; three
beeps consecutively, another pause; and then three more beeps.

One beep code is often misunderstood. If a video card is not installed or
is failing, the system board will generate a long-short-long-short beep
code. This is often interpreted as a 1-2-1 beep code. But POST errors
always vary in the length of the pause and not the duration of the beep
tone.

Another way of identifying a POST error is to use a device called a
POST card. This peripheral card is inserted into one of the ISA slots
and has an LED (or LCD) read out showing the contents of port 80h.

The following table provides a list of all beep codes and POST rou­tines..

B-1

Micronics M4Li System Board Manual

Code Beeps POST Routine Description

02 Verify Real Mode.
04 Get CPU type.
06 Initialize system hardware.
08 Initialize chipset registers with initial POST values.

09 Get in POST Reg.
0A Initialize CPU registers.
0C Initialize cac he in itial POST valu e s .
OE Initialize I/O.
OF Initialize th e localb us IDE.

10 Initialize Power Management.

11 Load alternate registers with initial POST values.

12 Jump to UserPatch0.

14 Initialize keyboard controller.

16 2-2-3 BIOS ROM checksum.

18 8254 timer initialization.
1A 8237 DMA controller initialization.
1C Reset Programmable Interrupt Controller.

20 3-1-1 Test DRAM refresh.

22 3-1-3 Test 8742 Keyboard Controller.

24 Set ES segment register to 4 GB.

28 Autosize DRAM.
2A Clea r 512K base RAM.
2C 3-4 -1 Test 512K base address lines.
2E 3-4-3 Test 512K base memory.

32 Test CPU bus-clock frequency.

34 Test CMOS RAM.

35 Initialize alternate chipset registers.

37 Reinitialize the chipset (MB only).

38 Shadow system BIOS ROM.

39 Reinitialize the cache (MB only).
3A Autosize cache.
3C Configure advanced chipset registers.
3D Load alternate registers with CMOS values.

40 Set initial CPU speed.

42 Initialize interrupt vectors.

44 Initialize BIOS interrupts.

46 2-1-2-3 Check ROM copyright notice.

47 Initialize manager for PCI Option ROMs.

48 Check video configuration against CMOS.

49 Initialize PCI bus and devices.

B-2

Beep and POST Codes

Code Beeps POST Routine Description

4A In itial ize all video adapters in system.
4C Shadow video BIOS ROM.
4E Display copyright notice.
50 Display CPU type and speed.
51 Initialize EISA board.
52 Test keyboard.
54 Set key click if enabled.
56 Enable keyboard.
58 2-2-3-1 Test for unexpected interrupts.
5A Display prompt “Press F2 to enter SETUP”.
5C Test RAM between 512 and 640k.
60 Test extended memory.
62 Test extended memory address lines.
64 Jump to UserPatch1.
66 Configure advanced cache registers.
68 Enable external and CPU caches.
6A Display external cache size.
6C Display shadow message.
6E Display non-disposable segments.
70 Display error messages.
72 Check for configuration errors.
74 Test real-time clock.
76 Check for keyboard errors.
7C Set up h a rd ware int e rru pt vec tors.
7E Test coprocessor if present.
80 Disable onboard I/O ports.
82 Detect and install external RS232 ports.
84 Detect and install external parallel ports.
86 Re-initialize on-board I/O ports.
88 Initialize BIOSData Area.
8A Initialize Extended BIOS Data Area.
8C Initialize floppy controller.
90 Initialize hard-disk controller.
91 Initialize localbus hard-disk controller.
92 Jump to UserPatch2.
93 Build MPTABLE for multi-processor boards.
94 Disable A20 address line.
96 Clear huge ES segment register.
98 Search for option ROMs.
9A Shadow option ROMs.

B-3

Micronics M4Li System Board Manual

Code Beeps POST Routine Description

9C Set up Power Management.
9E Enable hardware interrupts.
A0 Set time of day.
A2 Check key lock.
A4 Initialize typematic rate.
A8 Erase F2 prompt.
AA Scan for F2 keystroke.
AC Enter SETUP.
AE Clear in-POST flag.
B0 Check for errors.
B2 POST done - prepare to boot operating system.
B4 One beep.
B6 Check password (optional).
B8 Clear global descriptor table.
BC Clear parity checkers.
BE Clear screen (optional).
BF Check virus and backup reminders.
C0 Try to boot with INT 19.
D0 Interrupt handler error.
D2 Unknown interrupt error.
D4 Pending Interrupt.
D6 Initialize option ROM error.
D8 Shutdown error.
DA Extended Block Move.

DC Shutdown 10 error.

The following are for boot block in Flash ROM:
E2 Initialize the chipset.
E3 Initialize refresh counter.
E4 Check for Forced Flash.
E5 Check HW status of ROM.
E6 BIOS ROM is OK.
E7 Do a complete RAM test.
E8 Do OEM initialization.
E9 Initialize interrupt controller.
EA Read in the bootstrap code.
EB Initialize al l vec tors.
EC Boot the Flash program.
ED Initialize the boot device.
EE Boot code was read OK.

B-4

CHard Disk Drive Types

The following table lists the hard disk types supported by M4Li.

Hard Disk Drive Types

Type Cylinders Heads Write

Precomp

1 306 4 128 17 10
2 615 4 300 17 21
3 615 6 300 17 32
4 940 8 512 17 65
5 940 6 512 17 99
6 615 4 none 17 21
7 462 8 256 17 32
8 733 5 none 17 31

9 900 15 none 17 117
10 820 3 none 17 21
11 855 5 none 17 37
12 855 7 none 17 52
13 306 8 128 17 21
14 733 7 none 17 44
15 N/A N/A N/A N/A N/A
16 612 4 0 17 21
17 977 5 300 17 42
18 977 7 none 17 59
19 1024 7 512 17 62
20 733 5 300 17 31
21 733 7 300 17 94
22 733 5 300 17 31
23 306 4 0 17 10
24 612 4 305 17 21
25 612 2 300 17 10
26 614 4 none 17 21
27 820 6 none 17 42
28 977 5 none 17 42
29 1218 15 none 36 336
30 1224 15 none 17 159

Sectors Size

C-1

Micronics M4Li System Board Manual

Type Cylinders Heads Write

Sectors Size

Precomp

31 823 10 512 17 71
32 809 6 128 17 42
33 830 7 none 17 50
34 830 10 none 17 72
35 1024 5 none 17 44
36 1024 8 none 17 71
37 615 8 128 17 42
38 1024 8 none 26 109
39 925 9 none 17 72

C-2

Specifications

D

Processor Options Intel 486DX 33MHz, PGA.

Intel 486DX2 50 & 66MHz, PGA.
Intel 486DX4 75 & 100MHz.
Intel 486 DX2 3.3V Support.
Intel Pentium OverDrive Processor.
Intel 486 OverDrive Processor.
AMD 486DX and DX2 processors.
Cyrix 486DX and DX2 processors.

Chipset SIS 486/497 Chipset

SMC 665 Super I/O chip.

CPU Clock Select Frequency synthesizer chip. Jumper selectable

CPU speed.

Form Factor Mini AT footprint (8.5" x 9.5").

4 Layer PCB.

Specifications

Expansion Three ISA slots, three PCI slots, and one shared

slot.

BIOS Phoenix 4.04 Plug and Play BIOS on 1MB Flash

EPROM.
Mode 3 IDE drive support.
Auto-detection of memory size.
Auto-configuration of IDE hard disk drives.

RAM Capacity 4MB to 128MB.

Keyboard AT compatible (AT Version).

PS/2 compatible (PS/2 Version).

Internal Cache Depends on type of CPU installed.

External Cache 0K, 128K, 256K, or 512K write-back or write-

through.

D-1

Micronics M4Li System Board Manual

I/O Ports Built in support.

Two high speed serial ports (16550 compatible).
One bi-directional parallel port.

Enhanced Parallel Port (EPP) compatible.
Microsoft and Hewlett Packard Extended
Capabilities Port (ECP) compatible.

Floppy Port Supports two floppy drives

(2.88, 1.44, 1.2, 720K, 360K).

PCI IDE Port Supports four IDE hard disks.

Mode 3 support.
Multiple sector transfer support.
LBA support.

Environmental Specifications

The environment in which the M4Li is located is critical. Micronics recom­mends the following environmental specifications:

Temperature Rang e

Operating: 50 to 104 degrees Fahrenheit (10 to 40 degrees Celsius).

Non -Operating: 50 to 140 degrees Fahrenheit (10 to 60 degrees Celsius).

Shipping: -22 to 140 degrees Fahrenheit (-30 to 60 degrees Celsius).

Relative Humidity

Operating: 20% to 80%.

Non-Operating: 5% to 90%.

D-2

Battery Disposal

Specifications

Warning:
DO NOT: open battery; dispose of in fire; recharge; put in backwards, mix
with used or other battery types. May explode or leak and cause personal
injury.

D-3

Micronics M4Li System Board Manual

D-4

Installing a Power Module

E

Installing a Power Module

The M4Li will accommodate a large variety of 486 processors. When
installing a 5.0V processor, locate J4 on your system board (see Figure
2-1), and configure it as shown below (Figure E-1).

Figure E-1 Configuring Jumper J4

To configure your system board for a 3.3V or 4.0V processor, you will
need to order a Power Module. If you do not have one, contact Micron­ics’ Customer Service department at [phone].

To install a Power Module, remove all jumpers from Jumper J4 and install it as
shown below (Figure E-2).

Figure E-2 Installing a Power Module

E-1

Micronics M4Li System Board Manual

After you have installed the Power Module, secure it with a tie strap (Figure
E-3) and your installation is complete.

Figure E-3 Securing the Power Module

E-2