American Megatrends MAN-758 User Manual

MegaRUM

Dual Pentium® II

PCI ISA Motherboard

User's Guide

MAN-758

6/5/97

© 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 American Megatrend'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

VESA is a registered trademark of the Video Electronics Standards Association.
Intel, Pentium. Pentium Pro, and Pentium II are registered trademarks of Intel Corporation.
MS-DOS, Microsoft Word, and Microsoft are registered trademarks of Microsoft Corporation. Microsoft
Windows, Windows NT, and Windows 95 are trademarks of Microsoft Corporation.
IBM, AT, XT, CGA, VGA, PS/2, OS/2, and EGA are registered 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.
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Toshiba is a registered trademark of Kabushiki Kaisha Toshiba.
All other brand and product names are trademarks or registered trademarks of their respective companies.

Revision History

6/5/97 Initial release of preliminary version.

MegaRUM PCI Motherboard User’s Guideii

Preface

To the OEM Thank you for purchasing the high performance American Megatrends

MegaRUM Dual Pentium II PCI 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 MegaRUM 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 MegaRUM PCI motherboard. It explains how to assemble a
system based on the MegaRUM PCI 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 770­246-8600.

Web Site We invite you to access the American Megatrends world wide web site at:

http://www.ami.com.

Preface iii

Packing List

Do not use 16 MB x 36 (64 MB) SIMMs that have 36 chips per SIMM.

excessive loading on the motherboard circuitry. If you must use 64

Do not use 70 ns SIMMs. The system memory timing cycle on this

You should have received the following:

•

a MegaRUM Dual Pentium II PCI ISA motherboard,

•

two serial cables,

•

one parallel cable,

•

one VGA cable,

•

two VGA driver diskettes for Windows 95 and Windows NT V3.5x,

•

5 SCSI driver diskettes,

•

a diskette containing the American Megatrends DMI Wizard 95 software utility,

•

The DMI Wizard 95 User’s Guide,

•

the SystemGuru User’s Guide,

•

4 diskettes containing the SystemGuru Server Management Software for Windows NT,

•

a Warranty Card, and

•

the American Megatrends MegaRUM Dual Pentium II PCI ISA Motherboard User's Guide.

Warning

This type of 16 MB SIMM does not work reliably because of

MB SIMMs, use only SIMMs that have 12 or 8 chips per SIMM.

motherboard are very sensitive. This motherboard does not work

reliably with 70 ns SIMMs.

MegaRUM PCI Motherboard User’s Guideiv

1 Hardware Installation

Overview

The American Megatrends MegaRUM PCI Dual Pentium II ISA motherboard
features include:

• two Intel Pentium II CPUs operating at 120, 133, 150, 166, 180, 200, 210, 233,

240, 266 MHz or higher speeds ,

• up to 1 GB of system memory on the motherboard,

• parity checking or ECC (Error Checking and Correction),

• PCI local bus throughput of 132 megabytes per second,

• two Ultra Wide SCSI channels operating at 40 MBs,

• specially designed for the American Megatrends RAID Upgrade controller

cards,

• onboard ATI Rage II PCI VGA controller with 2 MB of synchronous

graphics RAM,

• the American Megatrends SystemGuru server management software,

• two ISA expansion slots, and

•

six PCI expansion slots.

CPUs The MegaRUM motherboard will support all Intel Slot1 CPUs operating at 233

MHz, 266 MHz, or faster speeds.

PCI Bus Speed AMIBIOS automatically configures the PCI slots. The PCI slots are

synchronous with the CPU clock:

CPU External Clock Frequency PCI Expansion Slot Frequency

66 MHz 33 MHz
60 MHz 30 MHz

Cont’d

Chapter 1 Hardware Installation 1

Overview, Continued

Onboard I/O The MegaRUM motherboard includes:

• an onboard ATI Rage II PCI VGA controller with 2 MB of synchronous

graphics memory,

• two onboard Symbios Logic 53C875 SCSI controllers that provide 2 40

MBs ultra wide SCSI channels and one ultra wide/narrow SCSI channel,

• two 40-pin IDE connectors for 1 – 4 IDE drives,

• a 34-pin floppy drive connector,

• two serial port connectors,

• a 25-pin parallel port connector,

• a keyboard DIN connector,

• two 4-pin USB ports, and

•

a 9-pin berg mouse connector.

Server Management Software The American Megatrends SystemGuru server management

software is included with the MegaRUM motherboard. SystemGuru uses the
I2C interface to constantly monitor and report the CPU temperature, fan speed,
ECC memory errors, ambient temperature, CPU voltage, system voltage and
other user-specified system status information to any remote client computer.
See the American Megatrends SystemGuru User’s Guide for additional
information.

Onboard PCI VGA The PCI VGA on the MegaRUM motherboard is supported by the ATI 3D

RAGE II 264GT PCI Graphics Controller chip. The PCI VGA features are:

•

2 MB SGRAM (not upgradable),

•

a VGA cable is included, and

•

video drivers for Windows 95 and Windows NT will be provided.

You can download video drivers for all other operating systems from the ATI
BBS at 905-764-9404. Make sure you load the ATI 3D RAGE II drivers from the
diskette provided. Windows 95 auto detection tries to load the ATI Mach 64
drivers, which will not function properly.

MegaRUM PCI Motherboard User’s Guide2

MegaRUM PCI Dimensions

The motherboard is approximately 12.25” by 13.8”. The motherboard height
restrictions are shown below:

Warning

This motherboard contains sensitive electronic components

that can be easily damaged by static electricity. Follow the

antistatic instructions carefully to ensure correct installation

and to avoid damage.

Chapter 1 Hardware Installation 3

MegaRUM PCI Motherboard Layout

MegaRUM PCI Motherboard User’s Guide4

Step 1 Unpack the Motherboard

Step Action

1 Inspect the cardboard carton for obvious damage. If

damaged, call 770-246-8645. Leave the motherboard in its
original packing.

2 Perform 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.

3 Inside 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.

4 Inspect 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.

5 If 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.

Chapter 1 Hardware Installation 5

Step 2 Configure CPU Speed

If using two CPUs with different speed ratings, set the motherboard jumpers to
the lower CPU speed. J21 and J24 select the CPU speed. The drawings on the
next screens show how J24 and J21 should look for each possible CPU speed:

CPU Speed J21 J24

120MHz OPEN Short Pins 1-2,

133 MHz Shorted Short Pins 1-2,

150 MHz OPEN Short Pins 3-4

166 MHz Shorted Short Pins3-4

180 MHz OPEN Short Pins 1-2

200 MHz Open Short Pins 1-2

210 MHz OPEN Short Pin 5-6
233 MHz Shorted Short Pin 5-6
240 MHz OPEN Short Pins 1-2

266 MHz Shorted Short Pins 1-2

Short Pins 3-4
Short Pins 5-6
Short Pins 7-8

Short Pins 3-4
Short Pins 5-6
Short Pins 7-8

Short Pins 5-6
Short Pins 7-8

Short Pins 5-6
Short Pins 7-8

Short Pins 5-6
Short Pins 7-8

Short Pins 5-6
Short Pins 7-8

Short Pin 7-8
Short Pin 7-8

Short Pins 3-4
Short Pins 7-8

Short Pins 3-4
Short Pins 7-8

Important

Please contact American Megatrends technical support at

770-246-8645 to support a CPU running at other speeds.

Cont’d

MegaRUM PCI Motherboard User’s Guide6

Step 2 Configure CPU Speed, Continued

Cont’d

Chapter 1 Hardware Installation 7

Step 2 Configure CPU Speed, Continued

MegaRUM PCI Motherboard User’s Guide8

Step 3 Configure CPU Voltage

J5 and J15 Each CPU can be independently set to the correct CPU core voltage. J5 sets the

voltage for the CPU in CPU Slot1. J15 sets the voltage for the CPU in Slot2.

Core CPU Voltage J5 and J15 Setting

3.50V Short Pins 3-4

3.40V Short Pins 3-4

3.3V (Factory Setting) Short Pins 3-4

3.2V Short Pins 3-4

3.1V Short Pins 3-4

3.0V Short Pins 3-4

2.9V Short Pins 3-4

2.8V Short Pins 3-4

2.7V Short Pins 5-6

2.6V Short Pins 5-6

2.5V Short Pins 5-6

2.4V Short Pins 5-6

2.3V Short Pins 7-8

2.2V Short Pins 7-8

2.1V Short Pins 9-10

2.05V Short Pins 1-2

2.0V Short Pins 1-2

1.95V Short Pins 1-2

1.90V Short Pins 1-2

1.85V Short Pins 1-2

1.8V Short Pins 1-2

No CPU None

Short Pins 5-6
Short Pins 7-8

Short Pins 9-10

Short Pins 5-6
Short Pins 7-8

Short Pins 5-6

Short Pins 9-10

Short Pins 5-6
Short Pins 7-8

Short Pins 9-10

Short Pins 7-8

Short Pins 9-10

Short Pins 7-8

Short Pins 9-10

Short Pins 7-8

Short Pins 9-10

Short Pins 9-10

Short Pins 3-4
Short Pins 5-6
Short Pins 7-8

Short Pins 9-10

Short Pins 3-4
Short Pins 5-6
Short Pins 7-8

Short Pins 3-4
Short Pins 5-6

Short Pins 9-10

Short Pins 3-4
Short Pins 5-6

Short Pins 3-4
Short Pins 7-8

Short Pins 9-10

Short Pins 3-4
Short Pins 7-8

Chapter 1 Hardware Installation 9

Step 4 Install Additional Voltage Regulator

One Voltage Regulator Module (VRM) is shipped with every MegaRUM
motherboard. You need another VRM if you install two CPUs. You can order
VRMs for Intel Pentium II CPUs from:

Manufacturer Part Number AMI Part Number

VXI 073-20715-02 MDL-P681-V5A140

Corsair SPX560KM MDL-P681-V5A140

MegaRUM PCI Motherboard User’s Guide10

Step 5 Connect CPU Fans

J1, J7, and

J23 pinout

J1 and J7 (shown below) are 3-pin bergs that connect the fan on the CPU heat
sink to the motherboard power. J1 is the CPU fan connector for the CPU in CPU
Slot1. J7 is the CPU fan connector for the CPU in CPU Slot2.

Ground

Pin 1

+12V

Fan Sense

All Pentium II CPUs are shipped with a heat sink and a CPU fan. The
connector from the CPU fan usually has three leads (has red, yellow, and black
leads). Connect the Red lead to Pin 3 (+12V). Make sure that you use fans
that have 3 leads . The 3rd (yellow) lead should provide a tachometer output to
permit the fan speed to be monitored by the onboard server management
hardware. If you must use fans with only 2 leads, connect the red lead to Pin 3.

J23 Chassis Fan J23 is a 3-pin berg located near the VRM for the CPU 2 socket. The pinout is

the same for J23 as it is for J1 and J7. J23 provides +12V power to the main
chassis fan. The chassis fan should provide a tachometer output on Pin 3 so it
can be monitored by the onboard server management hardware.

Step 6 Install CPU

The Pentium II CPUs are on Intel Slot1 adapter cards. Insert the Slot1 cards into
the CPU card sockets on the motherboard. The CPU Slot1 sockets are below
the SIMM sockets.

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.

Chapter 1 Hardware Installation 11

Step 7 Install Memory

System Memory There are eight 32-bit SIMM (Single Inline Memory Module) sockets. System

memory must be populated one bank at a time. Each bank has two sockets.
Each bank must be populated with the same type of SIMM. If a 4 MB SIMM is

installed in the first socket in Bank0, then the same type of 4 MB SIMM must
be installed in the second Bank0 SIMM socket. The minimum amount of
system memory supported by the MegaRUM PCI is 8 MB. Each socket can
hold one SIMM. You can use:

•

1 MB x 32 (or 36),

•

2 MB x 32 (or 36),

•

4 MB x 32 (or 36),

•

8 MB x 32 (or 36),

•

16 MB x 32 (or 36), or

•

32 MB x 32 (or 36) SIMMs.

The MegaRUM motherboard will support 128 MB SIMMs when they become
available, permitting up to 1 GB of system memory to be installed on the
motherboard.

Fast Page Mode, EDO, and Burst EDO SIMMs cannot be mixed. The
motherboard supports SIMMs operating at 60 or 70 ns (RAS access time). Set
the Chipset Setup DRAM Speed (ns) option correctly.

Memory Display System 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.

Cont’d

MegaRUM PCI Motherboard User’s Guide12

Step 7 Install Memory, Continued

Select SIMMs SIMMs must meet the following specifications:

Parameter Specification

Page Mode FAST

Refresh CAS before RAS

CAC

SIMM Part Numbers

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
16 MB x 36 Samsung KMM53616000AKG-6

t

RAC

t

AA

t

RP

t

CPA

t

Type Manufacturer Part Number

≤
≤
≤

70 ns

≤

20 ns
80 ns
45 ns

45 ns

Cont’d

Chapter 1 Hardware Installation 13

Step 7 Install Memory, Continued

Installing SIMMs The four SIMM sockets on the motherboard can be filled with either 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:

MegaRUM PCI Motherboard User’s Guide14

Step 8 Install the Motherboard

The motherboard mounting hole pattern is shown below. Standoffs and
mounting screws are not supplied with the motherboard. The chassis
manufacturer should supply these parts.

Step Action

1 Place the chassis on an anti-static mat. Connect the chassis to ground to avoid static

damage during installation. Connect an alligator clip with a wire lead to any
unpainted part of the chassis. Ground the other end of the lead at the same point as
the mat and the wristband.

2 Rotate the chassis so the front is to the right, and the rear is to the left. The side facing

you is where the motherboard is mounted. The power supply is mounted at the far end
of the chassis.

3 Hold the motherboard, component-side up, with the edge with the SIMM sockets

toward you and the edge with the power supply connector away from you. The
keyboard, mouse, and video connectors should be to the left.

4 Carefully slide the motherboard into the chassis. Make certain the edge connectors fit

the ports in the rear of the chassis. The motherboard should rest level with the
chassis.

5 Place the mounting screws in the holes provided and tighten them. If necessary, shift

the motherboard slightly to align the mounting holes on the motherboard with the
holes on the chassis,

If using metallic screws, make sure you use them only in

Warning

the plated mounting holes.

If using metallic screws, make sure the head of the screw

fits completely inside the plated mounting holes.

Chapter 1 Hardware Installation 15

Step 9 Attach Cables

Connectors The MegaRUM PCI motherboard includes many connectors. Connection

instructions, illustrations of connectors, and pinouts are supplied in the
following pages. A list of all connectors described in this section follows:

Connector

Power supply connectors P1, P2, P3, and P4
Drain CMOS RAM power – J35
Keyboard connector J12
PS/2 mouse connector J2
Chassis intrusion LED – J29
External SMI connector – J18
Disable onboard VGA – J14
Hardware reset switch J28
Speaker J46
SCSI activity LED – J40
Keyboard lock connector J41
Turbo LED connector J33
IDE LED connector J38
USB port 1 connector J19
USB port 2 connector J20
System override – J47
AMI-specific VGA cable – J16
Disable VGA interrupt – J13
Serial port 1 connector J9
Serial port 2 connector J8
Parallel port connector J3
Floppy connector J4
IDE channel 0 connector J10
IDE channel 1 connector J11
SCSI channel 1 (Wide) – J44
SCSI channel 1 (Narrow) – J36
SCSI channel 2 (Wide) – J45
SCSI channel 2 (Narrow) – J37

Cont’d

MegaRUM PCI Motherboard User’s Guide16

Step 9 Attach Cables, Continued

Cable Connector Ends When connecting chassis connectors to the motherboard, make sure to

connect the correct connector end. Most connector wires are color-coded.
Match the color of the wires leaving the switch or LED to the same pin on the
connector end. There may be more than one connector with the same color-
coded wires. If so, follow the wire to the switch or LED. All motherboard
components are outlined by a white rectangular box with a broad arrow at one
end. Pin 1 is always at the arrow end of the white outlined box, as shown
below:

Chapter 1 Hardware Installation 17

Step 9 Attach Cables, Continued

Connect Power Supply The power supply should match the physical configuration of the

chassis. Make sure the power switch is off before assembly.
Before attaching all components, make sure the proper voltage has been

selected. Power supplies often can run on a wide range of voltages and must
be set (usually via a switch) to the proper range. Use at least a 450 watt power
supply, which should have built-in filters to suppress radiated emissions.

Connect Power Cables Attach the power supply cables to the power connector (P1 and P3) on

the motherboard. AT-compatible power supplies have two six-pin connectors,
attached as shown below. The six-pin connector on the power cable with three
red wires and two black wires is attached to P3. The other connector on the end
of the power cable is attached to P1.

Cont’d

MegaRUM PCI Motherboard User’s Guide18

Step 9 Attach Cables, Continued

Power Connector Keys The power connectors are keyed to prevent incorrect installation. The

keys on the connector must be cut to fit on some power supplies, as shown
below.

P1 Pinout

Pin Description

1 Power Good (Orange wire) (Not used)
2 VCC (Red wire)
3 +12 Volts (Yellow wire)
4 -12 Volts (Blue wire)
5 Ground (Black wire)
6 Ground (Black wire)

P3 Pinout

Pin Description

1 Ground (Black wire)
2 Ground (Black wire)
3 -5 Volts (White wire)
4 VCC (Red wire)
5 VCC (Red wire)
6 VCC (Red wire)

Cont’d

Chapter 1 Hardware Installation 19

Step 9 Attach Cables, Continued

P2 Pinout

Pin Description

1 5V
2 5V
3 5V
4 Ground
5 Ground
6 Ground

P4 Pinout

Pin Description

1 3V
2 3V
3 3V
4 Ground
5 Ground
6 Ground

J35 Erase Password J35 is a 2-pin berg that can be used to erase the contents of CMOS RAM,

where all system configuration information is stored.
If you forget the AMIBIOS password, you can place a shorting bridge on J35

for a few seconds to erase the old password (and all system configuration
information as well). You must then reboot the computer, run AMIBIOS Setup,
and restore all system configuration information. The J35 settings are:

CMOS Drain J35 Setting

Normal operation (factory setting). OPEN

The contents of CMOS RAM are destroyed. Shorted

Cont’d

MegaRUM PCI Motherboard User’s Guide20

Step 9 Attach Cables, Continued

J12 Keyboard Connector The keyboard connector is a 6-pin DIN socket. The pinout is shown

below.

Pin Assignments

1 Keyboard clock
2 Keyboard data

3, 6 Not used

4 Ground
5 VCC

Connect Mouse Cable The mouse connector (J2) is a 10-pin berg. The mouse cable is the same as

the serial cable in the motherboard. Two serial cables are shipped with the
motherboard. Use one of these cables for the mouse, or make your own cable.
The pinout is:

Pin Description Pin Description

1 Mouse Clock 2 N/C
3 N/C 4 N/C
5 N/C 6 VCC
7 N/C 8 Mouse Data
9 Ground 10 N/C

J29 Chassis Door Intrusion J29 is a 2-pin berg that can be used to attach a wire to the chassis

door intrusion connector, if the chassis has this feature. The logic must be set
so that Pin 1 and Pin 2 are shorted when the chassis door is closed and open
when the chassis door is opened.

J18 External SMI J18 is a 3-pin berg. An external SMI (System Management Interrupt) source

can be connected to J18. When an external SMI needs to generate an SMI to
the system, Pin 1 must be shorted to Pin 2 (as a pulse).

Cont’d

Chapter 1 Hardware Installation 21

Step 9 Attach Cables, Continued

J28 Reset Switch Connector J28 is a two-pin single-inline berg that is attached via a cable to an

externally-mounted reset switch.
When the reset switch is pressed, the system performs a hard reset. Pin 1 is

ground and Pin 2 is Hard Reset.

J46 Speaker Connector J46 is a four-pin single-inline berg that is optionally attached via a cable

to a standard system speaker. AMIBIOS signals hardware problems through
the speaker. Pin 1 on the motherboard is identified by the arrow on the white
box around the berg. The MegaRUM PCI motherboard also has a built-in
speaker mounted on the motherboard.

Pin Description

1 Data Out
2 Key
3 N/C
4 VCC

J40 SCSI Activity J40 is a 4-pin berg that attaches to a cable connected to the SCSI activity

indicator.

J47 System Override J47 is a 2-pin berg that attached to a system override switch.

Cont’d

MegaRUM PCI Motherboard User’s Guide22

Step 9 Attach Cables, Continued

J41 Keyboard Lock J41 is a 5-pin single-inline berg that is attached via a cable to the keyboard

lock connector (or separate keyboard lock and Power LED connectors). The
computer chassis may not include the keyboard lock and Power LED on a
single connector. The keyboard lock allows the user to lock the keyboard,
protecting the system from unauthorized use. Pin 1 on the motherboard is
identified by the broad arrow.

Pin Description

1 VCC
2 Ground
3 Ground
4 Keyboard Lock (KBDINH)
5 Ground

J33 Turbo LED J33 is a 2-pin berg that is attached via a cable to the externally-mounted bipolar

Turbo LED. The LED lights when the motherboard is running at high speed.

J38 IDE LED J38 is a two-pin berg that is attached via a cable to the externally-mounted IDE

Activity LED. This LED lights when the IDE drive is running.

Warning

In some IDE drives, you may have to disable the

IDE LED mounted on the drive by changing a

jumper or setting a switch on the IDE drive itself,

before the IDE drive sends a signal to J34.

Cont’d

Chapter 1 Hardware Installation 23

Step 9 Attach Cables, Continued

Optional USB Cable You can only use a custom USB cable with this motherboard. You can order

this USB cable (AMI part number CBLKIT-USB-1) from American Megatrends
at 800-828-9264.

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.

J19, J20 USB Connectors J19 and J20 are 4-pin USB (Universal Serial Bus) connectors. The

pinouts are:

Pin Signal Description

1 VCC
2 Data+
3 Data–
4 Ground

J14 Enable Onboard PCI VGA J14 is a 2-pin berg that enables or disables the onboard PCI ATI

VGA controller. The J14 settings are:

Onboard PCI ATI VGA Setting J19 Setting

PCI VGA Enabled OPEN (Default)

PCI VGA Disabled Shorted

Cont’d

MegaRUM PCI Motherboard User’s Guide24

Step 9 Attach Cables, Continued

J13 VGA Interrupt Enable J13 is a 2-pin berg that enables interrupt support for the onboard PCI

ATI VGA controller:

Onboard PCI ATI VGA Interrupt Setting J13 Setting

PCI interrupt enabled for onboard PCI VGA. OPEN

PCI interrupt disabled for onboard PCI VGA. Shorted (Default)

J16 VGA Connector J16 is a 14-pin dual inline berg for the onboard ATI Rage II PCI VGA

controller. Connect the VGA cable supplied with this motherboard to J16. This
cable converts J16 14-pin berg signals to a standard DB15 VGA connector,
which can be mounted on the chassis. Make sure the red wire on the cable is
connected to Pin1 of J16. The pinout is:

Pin Signal Description Pin Signal Description

1 Red 8 Ground
2 Green 9 Ground
3 Blue 10 Ground
4 VSYNC 11 Fuse
5 HSYNC 12 Ground
6 MONID1 13 Ground
7 MONID2 14 Pin is Cut

VGA Cable and J16 Connectors The following drawing illustrates the VGA connectors on the

VGA cable and J16 on the motherboard:

Cont’d

Chapter 1 Hardware Installation 25

Step 9 Attach Cables, Continued

Pin 6 Groun

d

Standard VGA Female Connector

Standard VGA Connector The pinout for the standard female DB15 VGA connector is shown

below:

Pin 1 R ed

Pin 7 G ro un d

Pin 2 G ree n

P in 8 G ro u n d

Pin 3 B lu e

Pin 9 F use

Pin 4

Pin 5 G rou nd

Pin 1 0 G r ou nd

P in 11

Pin 1 2 M O N ID 1

Pin 1 3 H S YN C

Pin 1 4 VS YN C

Pin 15 MON ID 2

J16 VGA Connector and Standard VGA The connections on the VGA cable that has a standard

DB15 female VGA connector and a 14-pin berg connector at the other end are
shown below:

J16 Standard VGA Connector

Pin Signal Pin Signal

1 Red 1 Red
2 Green 2 Green
3 Blue 3 Blue
4 VSYNC 14 VSYNC
5 HSYNC 13 HSYNC
6 MONID1 12 MONID1
7 MONID2 15 MONID2
8 Ground 6 Ground

9 Ground 7 Ground
10 Ground 8 Ground
11 Fuse 9 Fuse
12 Ground 5 Ground
13 Ground 10 Ground
14 Pin is Cut N/A

N/A N/A 4, 11 Unused

MegaRUM PCI Motherboard User’s Guide26

Step 10 Connect I/O

Onboard Adapters The MegaRUM PCI motherboard has:

•

two serial ports (J8 and J9),

•

a parallel port (J2),

•

two Ultra Wide SCSI connectors,

•

two Ultra narrow SCSI connectors,

•

an IDE controller on the PCI bus (the primary IDE connector is J12 and the secondary IDE connector is
J10), and

•

a floppy controller (J1).

The serial and parallel port connectors are described below.

Conflicts AMIBIOS minimizes conflicts between onboard and offboard I/O devices.

AMIBIOS automatically checks the adapter cards installed in the expansion
slots on the MegaRUM PCI motherboard for a hard disk or floppy controller
and serial or parallel ports.

J8 SER1 J9 SER2 J8 and J9 are 9-pin connectors that provide an AT-compatible serial port

interface. Connect the cables supplied with the motherboard to J8 and J9. The
serial port base I/O port address and other serial port settings can be selected
in Peripheral Setup in WINBIOS® Setup.

The J8 and J9 pinout is shown below.

Pin Signal Description Pin Signal Description

1 Carrier Detect 6 Data Set Ready
2 Receive Data 7 Request to Send
3 Transmit Data 8 Clear to Send
4 Data Terminal

Ready

5 Ground 10 CUT PIN

9 Ring Indicator

Cont’d

Chapter 1 Hardware Installation 27

Step 10 Connect I/O, Continued

J3 Parallel Port J3 is a 25-pin connector for a parallel port. The J3 pinout is shown below.

Connect the 16-pin to DB25 cable provided with the motherboard to J3. The
parallel port interface supports:

•

the standard Centronics-compatible parallel port,

•

the ECP (Extended Capabilities Port), and

•

the EPP (Enhanced Parallel Port) port.

All parallel port settings must be correctly configured through Peripheral Setup
in WINBIOS Setup.

Pin Signal

Description

1 STROBE# 2 PD0
3 PD1 4 PD2
5 PD3 6 PD4
7 PD5 8 PD6

9 PD7 10 ACK#
11 BUSY 12 PE
13 SLCT 14 AUTOFD#
15 ERROR# 16 INIT#
17 SLCTIN# 18 Ground
19 Ground 20 Ground
21 Ground 22 Ground
23 Ground 24 Ground
25 Ground 26 Ground

Pin Signal Description

Cont’d

MegaRUM PCI Motherboard User’s Guide28

Step 10 Connect I/O, Continued

J4 Floppy J4 is a 34-pin dual-inline berg. Connect the cable from the floppy drive to J4, as

shown below. The onboard floppy controller cannot be used if a hard disk card
with a floppy controller is installed. Choose Standard Setup and Peripheral
Setup to configure the floppy controller.

The motherboard supports up to two 720 KB, 1.44 MB, or 2.88 MB 3½" drives
and 360 KB and 1.2 MB 5¼" drives. The connecting cable is a 34-pin ribbon
connector with two 34-pin edge connectors for attaching the floppy disk
drives. There is a small twist in the cable between the floppy connectors. The
last (end) connector should be connected to floppy drive A:.

Cont’d

Chapter 1 Hardware Installation 29

Step 10 Connect I/O, Continued

J1 Floppy Connector Pinout

Pin Use Pin Use

1 GND 2 DENSE1
3 GND 4 N/C
5 GND 6 DRATE0
7 GND 8 -INDEX

9 GND 10 -MOTOR0
11 GND 12 -FDSEL1
13 GND 14 -FDSEL0
15 GND 16 -MOTOR1
17 GND 18 DIR
19 GND 20 ­21 GND 22 -WDATA
23 GND 24 -WGATE
25 GND 26 -TRK0
27 GND 28 -WRPROT
29 GND 30 -RDATA
31 GND 32 HDSEL
33 GND 34 DSKCHNG

Twist in Floppy Cable

Floppy B to A Floppy B to A Floppy B to A Floppy B to A

10 to 16 12 to 14 14 to 12 16 to 10
11 to 15 13 to 13 15 to 11

Cont’d

MegaRUM PCI Motherboard User’s Guide30

Step 10 Connect I/O, Continued

IDE Drives Attach the IDE drives in the following manner. Choose Peripheral Setup in

WINBIOS Setup to enable the onboard IDE controller.

Cont’d

Chapter 1 Hardware Installation 31

Step 10 Connect I/O, Continued

Attach IDE Cable to J10 J10 is the primary IDE (Integrated Drive Electronics) hard disk drive

connector. Both the primary master and the primary slave IDE drives must be
connected by cable to J10, as shown below.

J10 is a 40-pin dual-inline berg that connects an IDE drive to the primary
onboard IDE connector. This motherboard supports IDE Modes 0, 1, 2, 3, and
4, IDE prefetch, LBA (Logical Block Address) mode, high capacity drives (over
528 MB), 32-bit data transfer, and fast IDE transfer. These IDE features are
configured in Peripheral Setup in the WINBIOS Setup utility.

Disable the onboard IDE interface in Peripheral Setup to use an ISA ESDI, RLL,
MFM, or SCSI hard disk drive controller.

Cont’d

MegaRUM PCI Motherboard User’s Guide32

Step 10 Connect I/O, Continued

J10 Pinout J10 is the primary IDE connector. The J10 pinout is:

Pin Use Pin Use

1 -RESET 2 GND
3 DATA7 4 DATA8
5 DATA6 6 DATA9
7 DATA5 8 DATA10

9 DATA4 10 DATA11
11 DATA3 12 DATA12
13 DATA2 14 DATA13
15 DATA1 16 DATA14
17 DATA0 18 DATA15
19 GND 20 KEY (N/C)
21 -REQ 22 GND
23 -IOW 24 GND
25 -IOR 26 GND
27 IDERDY 28 Pulldown
29 -ACK 30 GND
31 INT14 32 N/C
33 HA1 34 N/C
35 HA0 36 HA2
37 -CS0 38 -CS1
39 -IDEACT 40 GND

J11 Secondary IDE Controller J11, the secondary IDE connector, is a 40-pin dual-inline berg that

connects the secondary primary and slave IDE drives to the secondary
onboard IDE controller.

Attach the secondary master and slave IDE drives to J11 via a standard 40-pin
IDE cable.

Cont’d

Chapter 1 Hardware Installation 33

Step 10 Connect I/O, Continued

J11 Pinout J11 is the secondary IDE connector. The J11 pinout is:

Pin Use Pin Use

1 -RESET 2 GND
3 DATA7 4 DATA8
5 DATA6 6 DATA9
7 DATA5 8 DATA10

9 DATA4 10 DATA11
11 DATA3 12 DATA12
13 DATA2 14 DATA13
15 DATA1 16 DATA14
17 DATA0 18 DATA15
19 GND 20 KEY (N/C)
21 -REQ 22 GND
23 -IOW 24 GND
25 -IOR 26 GND
27 IDERDY 28 Pulldown
29 -ACK 30 GND
31 INT15 32 N/C
33 HA1 34 N/C
35 HA0 36 HA2
37 -CS2 38 -CS3
39 N/C 40 GND

MegaRUM PCI Motherboard User’s Guide34

Step 11 Connect SCSI I/O

SCSI Connectors J44 (SCSI channel 1) and J45 (SCSI channel 2) are 68-pin high density (Wide)

SCSI connectors. J36 (SCSI channel 1) and J37 (SCSI channel 2) are 50-pin low
density (Narrow) SCSI connectors.

All SCSI connectors are located in the same area below the two ISA
connectors.

High Density SCSI Connectors The 68-pin high density connectors are 0.050” pitch unshielded

connectors. The high-density connector pinouts are shown below:
These connectors provide all signals needed to connect to wide SCSI devices.

The connector pinouts are for a single-ended primary bus (P-CABLE) as
specified in SCSI-3 Parallel Interface X3T9.2, Project 885-D, revision 1.2b, date
July 2, 1993.

The cable assemblies that interface with this 68-pin connector are:

•

flat ribbon or twisted pair cable for connecting internal wide SCSI devices,

•

flat ribbon or twisted pair cable for connecting internal and external wide SCSI devices,

•

cable assembly for converting from internal wide SCSI connectors to internal non-wide (Type 2)
connectors,

•

cable assembly for converting from internal wide to internal non-wide SCSI connectors (Type 30), and

•

cable assembly for converting from internal wide to internal non-wide SCSI connectors.

Cont’d

Chapter 1 Hardware Installation 35

Step 11 Connect SCSI I/O, Continued

High-Density 68-Pin SCSI Connector Pinout

Signal Connector Pin Cable

Pin

Ground 1 1 2 35 -DB(12)
Ground 2 3 4 36 -DB(13)
Ground 3 5 6 37 -DB(14)
Ground 4 7 8 38 -DB(15)
Ground 5 9 10 39 -DB(P1)
Ground 6 11 12 40 -DB(0)
Ground 7 13 14 41 -DB(1)
Ground 8 15 16 42 -DB(2)
Ground 9 17 18 43 -DB(3)
Ground 10 19 20 44 -DB(4)
Ground 11 21 22 45 -DB(5)
Ground 12 23 24 46 -DB(6)
Ground 13 25 26 47 -DB(7)
Ground 14 27 28 48 -DB(P)
Ground 15 29 30 49 Ground
Ground 16 31 32 50 Ground
TERMPWR 17 33 34 51 TERMPWR
TERMPWR 18 35 36 52 TERMPWR
Reserved 19 37 38 53 Reserved
Ground 20 39 40 54 Ground
Ground 21 41 42 55 -ATN
Ground 22 43 44 56 Ground
Ground 23 45 46 57 -BSY
Ground 24 47 48 58 -ACK
Ground 25 49 50 59 -RST
Ground 26 51 52 60 -MSG
Ground 27 53 54 61 -SEL
Ground 28 55 56 62 -C/D
Ground 29 57 58 63 -REQ
Ground 30 59 60 64 -I/O
Ground 31 61 62 65 -DB(8)
Ground 32 63 64 66 -DB(9)
Ground 33 65 66 67 -DB(10)
Ground 34 67 68 68 -DB(11)

Cable

Pin

Connector Pin Signal

Cont’d

MegaRUM PCI Motherboard User’s Guide36

Step 11 Connect SCSI I/O, Continued

50-Pin Low-Density SCSI Connector The MegaRUM motherboard includes a 50pin low-density

0.0100” pitch shrouded SCSI connector for each SCSI channel. The pinout for
the 50-pin low-density connector is specified in SCSI-2 X39T9.2 project 375R,
revision 10K, April 28, 1993.

50-Pin Low-Density SCSI Connector Pinout

Signal Connector Pin Cable

Pin

Ground 1 1 2 2 -DB(0)
Ground 3 3 4 4 -DB(1)
Ground 5 5 6 6 -DB(2)
Ground 7 7 8 8 -DB(3)
Ground 9 9 10 10 -DB(4)
Ground 11 11 12 12 -DB(5)
Ground 13 13 14 14 -DB(6)
Ground 15 15 16 16 -DB(7)
Ground 17 17 18 18 -DB(8)
Ground 19 19 20 20 -DB(P)
Ground 21 21 22 22 Ground
Reserved 23 23 24 24 Ground
OPEN 25 25 26 26 Reserved
Reserved 27 27 28 28 TERMPWR
Ground 29 29 30 30 Reserved
Ground 31 31 32 32 Ground
Ground 33 33 34 34 -ATN
Ground 35 35 36 36 Ground
Reserved 37 37 38 38 -BSY
Ground 39 39 40 40 -ACK
Ground 41 41 42 42 -RST
Ground 43 43 44 44 -MSG
Ground 45 45 46 46 -SEL
Ground 47 47 48 48 -C/D
Ground 49 49 50 50 -REQ

Cable

Pin

Connector Pin Signal

Cont’d

Chapter 1 Hardware Installation 37

Step 11 Connect SCSI I/O, Continued

Single-Ended Ultra SCSI Understanding the cable requirements, termination and stub lengths is

key to the successful implementation of a Ultra-SCSI subsystem.

SCSI Cables - Up to Four Devices The total external SCSI cable length for single-ended when

using up to 4 Ultra-SCSI devices (maximum. capacitance of device = 25pf)
should be less than or equal to:

(3 meter-(SCSI signal length on AMI RAID)-(SCSI length in storage box)

= (3 meter - 0.305 meter - SCSI length in storage box)
= 2.695 - SCSI length in storage box

SCSI Cables - More than Four Devices The total external SCSI cable length for single-ended

when using from five to eight Ultra-SCSI devices (max. cap of device = 25pf)
should be less than or equal to:

(1.5 meter-(SCSI signal length on AMI RAID)-(SCSI length in storage box)

= (1.5 meter - 0.305 meter - SCSI length in storage box)

= 1.195 - SCSI length in storage box

Spacing Devices The SCSI devices should be uniformly spaced between terminators with the

end devices located as close as possible to the terminators.

SCSI Signal Path The SCSI signal path is a controlled impedance environment with the

following characteristic impedance:

90 ohms +/- 6 ohms for the REQ and ACK signals

90 ohms +/- 10 ohms for all other signals

Cont’d

MegaRUM PCI Motherboard User’s Guide38

Step 11 Connect SCSI I/O, Continued

SCSI Termination The SCSI channels on the MegaRUM motherboard use active termination for

each SCSI channel. You must terminate the SCSI bus properly. The SCSI bus
on each SCSI channel is an electrical transmission line and it must be
terminated properly at both ends to minimize reflections and losses. You
complete the SCSI bus by setting termination at both ends.

Do not add terminators in the middle of the SCSI bus. The end devices must be
located as close as possible to the terminators. A simple rule is to place SCSI
terminator after the last SCSI device on each of the SCSI connectors.
MegaRUM automatically terminates the onboard SCSI connectors.

Stub length The stub length shall not exceed 0.1 meter. The spacing of devices on the SCSI

bus should be at least three times the stub length to avoid stub clustering.

SCSI Cables Teflon flat ribbon cables give the best performance in the Ultra-SCSI

environment. These cables should be used for all internal cabling. To minimize
discontinuities and signal reflections, the use of cables with different
impedance’s on the same bus should be minimized.

Chapter 1 Hardware Installation 39

Step 11 Connect SCSI I/O, Continued

SCSI Termination Possibilities

SCSI

terminator

SCSI devices

(termination disabled on both)

SCSI devices

disabled

(termination disabled on both)

SCSI

terminator

SCSI

terminator

Termination on

Termination on controller

motherboard

enabled

enabled.

Setup using one connector for one channel

Termination on

Termination on controller

SCSI devices

(termination disabled on both)

Setup using two connectors for one channel

motherboard
disabled.

If the MegaRUM is at one end of a cable, it sets termination automatically at
that end. Otherwise, MegaRUM disables its own termination and you must set
termination at the cable ends. If another connector on MegaRUM is also used
for the same channel, the termination on MegaRUM is disabled automatically
and termination should be set on the device at the farthest end of the cable.

For a disk array, set SCSI bus termination so that removing or adding a SCSI
device does not disturb termination. An easy way to do this is to connect
MegaRUM at one end of the SCSI cable for each channel and to connect an
external terminator module at the other end of each cable. The connectors
between the two ends can connect SCSI devices. Disable termination on the
SCSI devices. See the manual for each SCSI device to disable termination.

Selecting a SCSI Terminator Use ALT-2 type external SCSI terminators on SCSI channels

operating at 10 MBs or higher synchronous data transfer.

Cont’d

MegaRUM PCI Motherboard User’s Guide40

Step 12 Install Drivers

The following drivers are provided with the MegaRUM motherboard:

•

one VGA driver diskettes for Windows NT v3.51 and v4.0,

•

one VGA driver diskette for Windows 95,

•

one diskette containing the American Megatrends DMI Wizard 95 utility,

•

four diskettes containing the American Megatrends SystemGuru server management software,

•

one diskette with SCSI drivers for Windows NT v3.51 and v4.0,

•

one diskette with SCSI drivers for SCO Unix V5.0,

•

one diskette with SCSI drivers for Windows 95,

•

one diskette with SCSI drivers for DOS and SCSI utility programs,

•

One diskette with SCSI drivers for Novell NetWare v3.xx and 4.xx.

Installing DMI Wizard 95 The American Megatrends DMI Wizard 95 User’s Guide is provided

with the MegaRUM motherboard. Follow the DMI Wizard 95 installation
instruction in the American Megatrends DMI Wizard 95 User’s Guide.

Installing SystemGuru The American Megatrends SystemGuru User’s Guide is provided with

the MegaRUM motherboard. Follow the DMI Wizard 95 installation instruction
in the American Megatrends SystemGuru User’s Guide.

Installing VGA Drivers The VGA driver installation process is operating system-dependent. See

the user documentation for the operating system that is installed in this
computer for information about the VGA driver installation procedure.

Installing SCSI Drivers The SCSI driver installation process is operating system-dependent.

See the user documentation for the operating system that is installed in this
computer for information about the SCSI driver installation procedure.

Chapter 1 Hardware Installation 41

Step 13 Test and Configure

Review the following points before powering up:

• make sure that all adapter cards are seated properly,

• make sure all connectors are properly installed,

• make sure the CPU is seated properly,

• make sure there are no screws or other foreign material on the

motherboard,

• plug the system into a surge-protected power strip, and

•

make sure blank back panels are installed on the back of the chassis to minimize RF emissions.

Start the Test Plug everything in and tur n on the switch. If there are any signs of a problem,

turn off the unit immediately. Reinstall the connectors. Call Technical Support if
there are problems.

BIOS Errors If the system operates normally, a display should appear on the monitor. The

BIOS Power On Self Test (POST) should execute.
If POST does not run successfully, it will beep or display error messages.

Beeps indicate a serious problem with the system configuration or hardware.
The Beep Code indicates the problem. AMIBIOS Beep Codes are defined in the
AMIBIOS Technical Reference. Make sure the affected part is properly seated
and connected. An error message is displayed if the error is less serious.
Recheck the system configuration or the connections.

Configure the System Run WINBIOS Setup. You must enter the requested information and save

the configuration data in NVRAM. The system will then reset, run POST, and
boot the operating system. See the following chapter for information on
configuring the computer.

MegaRUM PCI Motherboard User’s Guide42

2 WINBIOS® Setup

In ISA and EISA computers, the system parameters (such as amount of
memory, type of disk drives and video displays, and many other elements) are
stored in NVRAM (Non-Volatile Random Access Memory), also called CMOS
RAM. Unlike the DRAM (dynamic random access memory) that is used for
standard system memory, NVRAM requires very little power. When the
computer is turned off, a back-up battery provides power to NVRAM, which
retains the system parameters. Every time the computer is powered-on, the
computer is configured with the values stored in NVRAM by the system BIOS,
which gains control when the computer is powered on.

The system parameters are configured by a system BIOS Setup utility.
Historically, BIOS Setup utilities have been character-based, required keyboard
input, and have had user interfaces that were not very intuitive.

Graphical Setup American Megatrends has a new type of system BIOS Setup utility. WINBIOS

Setup has a graphical user interface the end user can access using a mouse.
The WINBIOS Setup code is so compact that it can reside on the same ROM as
the system BIOS. The system configuration parameters are set by WINBIOS
Setup.

Since WINBIOS Setup resides in the ROM BIOS, it is available each time the
computer is turned on.

Starting WINBIOS Setup As POST executes, the following appears:

Hit <DEL> if you want to run SETUP

Press <Del> to run WINBIOS Setup.

Chapter 2 WINBIOS Setup 43

Using a Mouse with WINBIOS Setup

WINBIOS Setup has a built-in mouse driver and can be accessed by either a
serial mouse or PS/2-style mouse. WINBIOS Setup supports Microsoft­Compatible serial mice and all PS/2-type mice.

The mouse click functions are: single click to change or select both global and
current fields and double-click to perform an operation in the selected field.

Using the Keyboard with WINBIOS Setup

WINBIOS has a built-in keyboard driver that uses simple keystroke
combinations:

Keystroke Action

<Tab>

<→, ←, ↑, ↓ Change or select the current field.

<Enter>

+
–

<Esc>
<PgUp>
<PgDn>
<Home>

<End>

<Ctrl><Alt><+> Change to high speed

<Ctrl><Alt><-> Change to low speed.

Change or select a global field.

Perform an operation in the current
field
Increment a value.
Decrement a value.
Abort any window function.
Return to the previous screen
Advance to the next screen
Returns to the beginning of the text.
Advance to the end of the text.

MegaRUM PCI Motherboard User’s Guide44

WINBIOS Setup Menu

The WINBIOS Setup main menu is organized into four sections. Each of these
sections corresponds to a section in this chapter.

Each section contains several icons. Clicking on each icon activates a specific
AMIBIOS function. The WINBIOS Setup main windows and related functions
are described below.

Main Windows The WINBIOS Setup main windows are:

WINBIOS Setup Windows See Section

The Setup icons allow you to set system configuration options

such as date, time, hard disk type, and floppy type.

The Utilities section allows you to change the WINBIOS

Setup screen colors and to change the language that WINBIOS

Setup screen message are written in.

The Security icons allow you to configure passwords and

enable AMIBIOS anti-virus protection.

Default has three icons that permit you to select a group of

settings for all AMIBIOS WINBIOS Setup options.

1
2

3
4

Chapter 2 WINBIOS Setup 45

Section 1 Setup

Standard Setup

Standard Setup options are displayed by choosing the Standard icon from the
WINBIOS Setup main menu. All Standard Setup options are described in this
section.

Date/Time Select the Standard option. Select the Date and Time icon. The current values

for each category are displayed. Enter new values through the keyboard.

Floppy Drive A: and B: Move the cursor to these fields via ↑ and ↓ and select the floppy type.

The settings are 360 KB 5¼ inch, 1.2 MB 5¼ inch, 720 KB 3½ inch, 1.44 MB
3½ inch, or 2.88 MB 3½ inch.

MegaRUM PCI Motherboard User’s Guide46

Standard Setup, Continued

Pri Master, Pri Slave, Sec Master, Sec Slave Select one of these hard disk drive icons to

configure the hard disk drive named in the option. Select Auto from the drive
parameters screen to let AMIBIOS automatically configure the drive. A screen
with a list of drive parameters appears. Click on OK to configure the drive.

Drive Type How to Configure

SCSI

IDE

Type

Select
provided by the SCSI drive or SCSI host adapter manufacturer should allow
you to configure the SCSI drive.

Type.

Select
on OK when AMIBIOS displays the drive parameters.

LBA/Large Mode

Select
than 540 MB.

Block Mode

Select

32-Bit Transfer

Select

. Select

Select

SCSI

in the drive parameter screen. The SCSI drivers

Auto

to let AMIBIOS determine the parameters. Click

. Select On if the drive has a capacity greater

. Select On to allow block mode data transfers.

. Select On to allow 32-bit data transfers.

CD-ROM

Standard MFM

Drive

Non-Standard

MFM Drive

PIO Mode

Select the
determine the PIO mode. If you select a PIO mode that is not supported by the
IDE drive, the drive will not work properly. If you are absolutely certain that
you know the drive’s PIO mode, select PIO mode 0 - 5, as appropriate.

Type

Select
the drive parameters.

Select
exactly matches your drive’s parameters.

Select
for drive types 1 - 46, select

parameters.

. Select

Type.
Type.

. It is best to select

CDROM

You must know the drive parameters. Select the drive type that

If the drive parameters do not match the drive parameters listed

. Click on OK when AMIBIOS displays

User

Auto

to allow AMIBIOS to

and enter the correct hard disk drive

Cont’d

Chapter 2 WINBIOS Setup 47

Standard Setup, Continued

Entering Drive Parameters You can also enter the hard disk drive parameters. The drive

parameters are:

Parameter Description

Type The number for a drive with certain identification

parameters.

Cylinders The number of cylinders in the disk drive.

Heads The number of heads.

Write

Precompensatio

n

Landing Zone This number is the cylinder location where the

Sectors The number of sectors per track. MFM drives

Capacity The formatted capacity of the drive is the number

The actual physical size of a sector gets
progressively smaller as the track diameter
diminishes. Yet each sector must still hold 512
bytes. Write precompensation circuitry on the
hard disk compensates for the physical difference
in sector size by boosting the write current for
sectors on inner tracks. This parameter is the
track number on the disk surface where write
precompensation begins.

heads normally park when the system is shut
down.

have 17 sectors per track. RLL drives have 26
sectors per track. ESDI drives have 34 sectors per
track. SCSI and IDE drives have even more
sectors per track.

of heads times the number of cylinders times the
number of sectors per track times 512 (bytes per
sector).

Cont’d

MegaRUM PCI Motherboard User’s Guide48

Standard Setup, Continued

Hard Disk Drive Types

Type Cylinders Heads Write

1 306 4 128 305 17 10 MB
2 615 4 300 615 17 20 MB
3 615 6 300 615 17 31 MB
4 940 8 512 940 17 62 MB
5 940 6 512 940 17 47 MB
6 615 4 65535 615 17 20 MB
7 462 8 256 511 17 31 MB
8 733 5 65535 733 17 30 MB

9 900 15 65535 901 17 112 MB
10 820 3 65535 820 17 20 MB
11 855 5 65535 855 17 35 MB
12 855 7 65535 855 17 50 MB
13 306 8 128 319 17 20 MB
14 733 7 65535 733 17 43 MB
16 612 4 0 663 17 20 MB
17 977 5 300 977 17 41 MB
18 977 7 65535 977 17 57 MB
19 1024 7 512 1023 17 60 MB
20 733 5 300 732 17 30 MB
21 733 7 300 732 17 43 MB
22 733 5 300 733 17 30 MB
23 306 4 0 336 17 10 MB
24 925 7 0 925 17 54 MB
25 925 9 65535 925 17 69 MB
26 754 7 754 754 17 44 MB
27 754 11 65535 754 17 69 MB
28 699 7 256 699 17 41 MB
29 823 10 65535 823 17 68 MB
30 918 7 918 918 17 53 MB
31 1024 11 65535 1024 17 94 MB
32 1024 15 65535 1024 17 128 MB
33 1024 5 1024 1024 17 43 MB
34 612 2 128 612 17 10 MB
35 1024 9 65535 1024 17 77 MB
36 1024 8 512 1024 17 68 MB
37 615 8 128 615 17 41 MB
38 987 3 987 987 17 25 MB
39 987 7 987 987 17 57 MB
40 820 6 820 820 17 41 MB
41 977 5 977 977 17 41 MB
42 981 5 981 981 17 41 MB
43 830 7 512 830 17 48 MB
44 830 10 65535 830 17 69 MB
45 917 15 65535 918 17 114 MB
46 1224 15 65535 1223 17 152 MB

AMIBIOS automatically sets IDE drive parameters. Select USER to enter MFM, ESDI, or RLL drive

Precompensation

parameters. Select Not Installed for SCSI drives. Select CDROM for CD-ROM drives.

Landing

Zone

Sectors Capacity

Chapter 2 WINBIOS Setup 49

Advanced Setup

Advanced Setup options are displayed by choosing the Advanced icon from
the WINBIOS Setup main menu. All Advanced Setup options are described in
this section.

Typematic Rate This option sets the rate at which characters on the screen repeat when a key is

pressed and held down. The settings are Slow or Fast. The Optimal and Fail­Safe default settings are Fast.

System Keyboard This option does not specify if a keyboard is attached to the computer. Rather,

it specifies if error messages are displayed if a keyboard is not attached. This
option permits you to configure workstations with no keyboards. The settings
are Absent or Present. The Optimal and Fail-Safe default settings are Present.

Primary Display This option configures the type of monitor attached to the computer. The

settings are Mono, CGA40x25, CGA80x25, VGA/EGA, or Absent. The Optimal
and Fail-Safe default settings are VGA/EGA.

Setup Color Scheme This option specifies the foreground, background, and border color

combinations that AMIBIOS Setup is displayed in. The settings are Pastel,
Army, LCD, and Sky. The Optimal and Fail-Safe default settings are LCD.

PS/2 Mouse Support Set this option to Enabled to enable AMIBIOS support for a PS/2-type

mouse. Pins 2-3 of the PS/2 Mouse Selector jumper on the motherboard must
be shorted together to enable PS/2 mouse support. The settings are Enabled or
Disabled. The Optimal and Fail-Safe default settings are Enabled.

Cont’d

MegaRUM PCI Motherboard User’s Guide50

Advanced Setup, Continued

Hit <DEL> Message Display Set this option to Disabled to prevent

Hit <DEL> if you want to run Setup

from appearing when the system boots. The settings are Enabled or Disabled.
The Optimal and Fail-Safe default settings are Enabled.

Wait for <F1> If Error AMIBIOS POST runs system diagnostic tests that can generate a

message followed by:

Press <F1> to continue

If this option is set to Enabled, AMIBIOS waits for the end user to press <F1>
before continuing. If this option is set to Disabled, AMIBIOS continues the
boot process without waiting for <F1> to be pressed. The settings are Enabled
or Disabled. The Optimal and Fail-Safe default settings are Enabled.

Pause on Config. Screen This option specifies the length of time that the AMIBIOS

configuration screen appears. The settings are 2 sec, 3 sec, 4 sec, 5 sec, 6 sec, 7

sec, 8 sec, 9 sec, or Disabled. The Optimal and Fail-Safe default settings are
Disabled.

Boot Up Num Lock Set this option to Off to turn the Num Lock key off when the computer is

booted so you can use the arrow keys on both the numeric keypad and the
keyboard. The settings are On or Off. The default settings are On.

Password Check This option enables password checking every time the system boots or when

you run AMIBIOS Setup. If Always is chosen, a user password prompt appears
every time the computer is turned on. If Setup is chosen, the password prompt
appears if AMIBIOS is executed. See the Advanced Setup chapter for
instructions on changing a password. The Optimal and Fail-Safe defaults are

Setup.

Cont’d

Chapter 2 WINBIOS Setup 51

Advanced Setup, Continued

Boot To SCO Unix Set this option to Yes only if running the SCO Unix v3.0, 5.0 or higher

operating system. The settings are Yes or No. The Optimal and Fail-Safe default
settings are No.

Boot To OS/2 Set this option to Yes if running OS/2 operating system and using more than 64

MB of system memory on the motherboard. The settings are Yes or No. The
Optimal and Fail-Safe default settings are No.

Floppy Drive Seek Set this option to Enabled to specify that floppy drive A: will perform a Seek

operation at system boot. The settings are Disabled or Enabled. The Optimal
and Fail-Safe default settings are Disabled.

Floppy Drive Swap Set this option to Enabled to permit drives A: and B: to be swapped. The

settings are Enabled or Disabled. The default settings are Disabled.

Floppy Access Control This option specifies the read/write access that is set when booting from

a floppy drive. The settings are Read/Write or Read-Only. The Optimal and
Fail-Safe default settings are Read/Write.

Hard Disk Access Control This option specifies the read/write access that is set when booting

from a hard disk drive. The settings are Read/Write or Read-Only. The Optimal
and Fail-Safe default settings are Read/Write.

S.M.A.R.T. For Hard Disks Set this option to Enabled to permit AMIBIOS to use the SMART

(Self Monitoring Analysis and Reporting Technology) protocol for reporting
server system information over a network. The settings are Enabled or
Disabled. The Optimal and Fail-Safe default settings are Disabled.

Cont’d

MegaRUM PCI Motherboard User’s Guide52

Advanced Setup, Continued

Quick Boot Set this option to Enabled to instruct AMIBIOS to boot quickly when the

computer is powered on. This option replaces the old Above 1 MB Memory
Test Advanced Setup option. The settings are:

Setting Description

Disabled

Enabled

The Optimal and Fail-Safe default settings are Disabled.

1st Boot Device This option sets the type of device for the first boot drives that the AMIBIOS

attempts to boot from after AMIBIOS POST completes. The settings are
Disabled, Network, Floptical, SCSI, CDROM, IDE-0, IDE-1, IDE-2, or IDE-3.
The Optimal and Fail-Safe default settings are IDE-0.

AMIBIOS test all system memory. AMIBIOS waits up to 40 seconds for a
READY signal from the IDE hard disk drive. AMIBIOS waits for .5 seconds
after sending a RESET signal to the IDE drive to allow the IDE drive time to
get ready again. AMIBIOS checks for a <Del> key press and runs AMIBIOS
Setup if the key has been pressed.
AMIBIOS does not test system memory above 1 MB.

AMIBIOS does not wait up to 40 seconds for a READY signal from the IDE
hard disk drive. If a READY signal is not received immediately from the IDE
drive, AMIBIOS does not configure that drive. AMIBIOS does not wait for .5
seconds after sending a RESET signal to the IDE drive to allow the IDE drive
time to get ready again.

You cannot run AMIBIOS Setup at system boot, because there is no delay for

Hit <Del> to run Setup

the

message.

2nd Boot Device This option sets the type of device for the second boot drives that the

AMIBIOS attempts to boot from after AMIBIOS POST completes. The settings
are Disabled, Floppy, Floptical, CDROM, or IDE-0. The Optimal and Fail-Safe
default settings are Floppy.

Cont’d

Chapter 2 WINBIOS Setup 53

Advanced Setup, Continued

3rd Boot Device This option sets the type of device for the third boot drives that the AMIBIOS

attempts to boot from after AMIBIOS POST completes. The settings are
Disabled, Floptical, Floppy, CDROM, or IDE-0. The Optimal and Fail-Safe
default settings are CD-ROM.

4th Boot Device This option sets the type of device for the third boot drives that the AMIBIOS

attempts to boot from after AMIBIOS POST completes. The settings are
Disabled, Floppy, Floptical, CDROM, or IDE-0. The Optimal and Fail-Safe
default settings are CD-ROM.

Try Other Boot Devices Set this option to Yes to instruct AMIBIOS to attempt to boot from any

other drive in the system if it cannot find a boot drive among the drives
specified in the 1st Boot Device, 2nd Boot Device, 3rd Boot Device, and 4th Boot
Device options.

The settings are Yes or No. The Optimal and Fail-Safe default settings are Yes.

L1/L2 Cache This option sets the type of caching algorithm used by the L1 internal cache

memory on the CPU and the L2 secondary cache memory. The settings are
WriteBack, WriteThru, or Disabled. The Optimal and Fail-Safe default settings
are WriteBack.

System BIOS Cacheable When set to Enabled, the contents of the F0000h system memory

segment can be read from or written to cache memory. The contents of this
memory segment are always copied from the BIOS ROM to system RAM for
faster execution. The settings are Enabled or Disabled. The Optimal default
setting is Enabled. The Fail-Safe default setting is Disabled.

Cont’d

MegaRUM PCI Motherboard User’s Guide54

Advanced Setup, Continued

Caching Controller Set this option to Present if a caching controller is installed in the computer.

The settings are Present or Absent. The Optimal and Fail-Safe default settings
are Absent.

Video Shadow C000,32K This option specifies how the 32 KB of video ROM at C0000h is

treated. The settings are:

Setting Description

DisabledThe contents of the video ROM are not copied to RAM.

EnabledThe contents of the video ROM area from C0000h -

C7FFFh are copied (shadowed) from ROM to RAM for
faster execution.

Cached The contents of the video ROM area from C0000h -

C7FFFh are copied from ROM to RAM and can be written
to or read from cache memory.

The Optimal default setting is Cached. The Fail-Safe default setting is

Disabled.

Shadow C800,16K
Shadow CC00,16K
Shadow D000,16K
Shadow D400,16K
Shadow D800, 16K
Shadow DC00,16K These options enable shadowing of the contents of the ROM area named in

the option. ROM areas not used by ISA adapter cards are allocated to PCI
adapter cards. The settings are:

Setting Description

DisabledThe contents of the named ROM area (C800, CC00, etc.)

are not copied to RAM.

Cached The contents of the named ROM area (C800, CC00, etc.)

are copied from ROM to RAM and can be written to or
read from cache memory.

EnabledThe contents of the named ROM area (C800, CC00, etc.)

are copied from ROM to RAM for faster execution.

The Optimal and Fail-Safe default settings are Disabled.

Chapter 2 WINBIOS Setup 55

Chipset Setup

Chipset Setup options are displayed by choosing the Chipset icon from the
WINBIOS Setup main menu. All Chipset Setup options are described in this
section.

PCI 2.1 Compliance Set this option to Enabled to program the chipset to comply with the PCI

Version 2.1 specification. The settings are Enabled or Disabled. The Optimal
and Fail-Safe default settings are Disabled.

DRAM Speed (ns) This option specifies the RAS access time (in nanoseconds) of the DRAM

used in the computer for system memory. The settings are 60 ns or 70 ns. The
Optimal and Fail-Safe default settings are 70 ns.

Cont’d

MegaRUM PCI Motherboard User’s Guide56

Chipset Setup, Continued

DRAM ECC Mode This option sets the type of system memory checking. The settings are:

Setting Description

Disabled

Level I

Level II

No error checking or error reporting is done.
Multibit errors are detected and reported as parity errors. Single-bit errors are

corrected by the chipset. Corrected bits of data from memory are not written back
to DRAM system memory. If

Level I

is selected, the J27 External SMI software
jumper on the Series 735 board is disabled.
Multibit errors are detected and reported as parity errors. Single-bit errors are
corrected by the chipset and are written back to DRAM system memory.
If a soft (correctable) memory error occurs, writing the fixed data back to DRAM
system memory will resolve the problem. Most DRAM errors are soft errors. If a
hard (uncorrectable) error occurs, writing the fixed data back to DRAM system
memory does not solve the problem. In this case, the second time the error occurs
in the same location, a Parity Error is reported, indicating an uncorrectable error.

Level II

If
Management option in Power Management Setup to

is selected, AMIBIOS automatically sets the Standard Power

Enabled

to make sure

that the System Management Interface (SMI) is enabled. If you do not want to
enable power management, set the Advanced Power Management (APM) option

Disabled

to

Disabled.

(APM) to

and set all Power Management Setup timeout options to

To enable power management, set Advanced Power Management

Enabled

and set the power management timeout options as desired.

The following illustrates the difference between Level I and Level II ECC.
Suppose a DRAM SIMM has a single bit uncorrectable error. Even writing
fixed data to this bit will not remove the error.

Setting then...

Level I the data error is fixed during the memory read cycle every time

the bad bit is accessed and the system continues to run, although
every time the bad bit is read and corrected, CPU cycles are
wasted.

Level II the system tries to write the corrected data back to the bad bit in

the DRAM SIMM. Since the bad bit in the SIMM cannot be fixed,
writing data to the bad bit has no effect. The next time the error
location is read, the chipset will once again find a bad bit. The
chipset generates a Parity Error, indicating an uncorrectable
memory error.

The Optimal and Fail-Safe defaults are Disabled.

Cont’d

Chapter 2 WINBIOS Setup 57

Chipset Setup, Continued

PCI VGA USWC/Video Frame Buffer Set this option to Enabled to enable the USWC memory

attribute and improve video performance when a PCI video adapter is installed.
However, VGA card drivers may not behave correctly when this option is set to
Enabled. This option is only available if the PCI VGA card supports pre­fetchable video frame buffers.

The settings are Disabled or Enabled. The Optimal and Fail-Safe defaults are

Disabled.

Optional ROM The MegaRUM motherboard has an empty option ROM socket. You can

install a 32 KB ROM in this socket. The starting memory address of this ROM
can be either C000h (only if this computer does not have a VGA controller),
C800h, D000h, or D800h. The following three Chipset Setup options
configure the option ROM only if you have installed a ROM chip in the
option ROM socket.

Optional ROM Decode This option specifies the starting address of an adapter ROM to be

decoded. The settings are C000h, C800h, D000h, D800h, or Disabled. The
Optimal and Fail-Safe defaults are Disabled.

Optional ROM Shadow Before Init Set this option to Enabled to permit the contents of the

option ROM to be copied to RAM before being initialized by AMIBIOS during
Power On Self Test. This option does not appear if the Optional ROM Decode
option is set to Disabled. The settings are Disabled or Enabled. The Optimal
and Fail-Safe default settings are Disabled.

Optional ROM Cacheable Set this option to Enabled to allow the contents of the option ROM

to be read from or written to cache memory. This option does not appear if the

Optional ROM Shadow Before Init option is set to Disabled. The settings are
Enabled or Disabled. The Optimal and Fail-Safe default settings are Disabled.

Cont’d

MegaRUM PCI Motherboard User’s Guide58

Chipset Setup, Continued

SCSI Channel #1 Set this option to Enabled to enable SCSI channel 1 on the motherboard. The

settings are Enabled or Disabled. The Optimal and Fail-Safe default settings
are Disabled.

SCSI Channel #2 Set this option to Enabled to enable SCSI channel 2 on the motherboard. The

settings are Enabled or Disabled. The Optimal and Fail-Safe default settings
are Disabled.

Watchdog Timer This motherboard has an integrated system watchdog timer. The watchdog

timer reboots the computer if the computer locks up (if there is no bus activity
for 1.2 seconds). Set this option to Enabled when running applications (such
as a security system) that require continuous monitoring. The computer then
automatically resets after it locks up and the application can continue running
with no human intervention required. The settings are Enabled or Disabled.
The Optimal and Fail-Safe default settings are Disabled.

CPU Thermal Alarm Set this option to Enabled to enable an alarm if the Pentium II CPU

overheats. The settings are Enabled or Disabled. The Optimal and Fail-Safe
default settings are Disabled.

ISA 8 Bit I/O Recovery Time This option specifies the length of the delay that is added to the

CPU cycle between consecutive 8-bit I/O operations. The length of the delay is
related to the CPU type and frequency. The settings are 1 Sysclock, 2

Sysclocks, 3 Sysclocks, 4 Sysclocks, 5 Sysclocks, 6 Sysclocks, 7 Sysclocks, 8
Sysclocks, or Disabled. The Optimal and Fail-Safe default settings are
Disabled.

Cont’d

Chapter 2 WINBIOS Setup 59

Chipset Setup, Continued

ISA 16 Bit I/O Recovery This option specifies the length of the delay that is added to the CPU

cycle between consecutive 16-bit I/O operations. The length of the delay is
related to the CPU type and frequency. The settings are 1 Sysclock, 2
Sysclocks, 3 Sysclocks, 4 Sysclocks, or Disabled. The Optimal and Fail-Safe
default settings are Disabled.

Memory Hole This option specifies the location of an area of memory that cannot be

addressed on the ISA bus. The settings are Disabled, 15 MB-16 MB, or
512KB-640KB. The Optimal and Fail-Safe default settings are Disabled.

Deturbo Frequency (MHz) This option specifies the deturbo frequency (in megahertz). The

deturbo frequency is a low speed used only for old software that cannot
operate at high speed. The settings are 6 MHz, 8 MHz, 12 MHz, or Disabled.
The Optimal and Fail-Safe default settings are Disabled.

USB Function Set this option to Enabled to enable the system BIOS USB (Universal Serial

Bus) functions. The settings are Enabled or Disabled. The Optimal and Fail­Safe default settings are Disabled.

USB Keyboard/Mouse Legacy Support Set this option to Enabled to enable USB support for

legacy keyboards and mice. The settings are Enabled or Disabled. The Optimal
and Fail-Safe default settings are Disabled.

MegaRUM PCI Motherboard User’s Guide60

Power Management Setup

The AMIBIOS Setup options described in this section are selected by
choosing the Power Management Setup icon from the Setup section on the
AMIBIOS Setup main menu.

Standard Power Management Set this option to Enabled to enable standard power management,

including SMI support. The settings are Enabled, Instant On, or Disabled. The
Optimal and Fail-Safe default settings are Disabled.

Advanced Power Management (APM) Set this option to Enabled to enable APM. The settings

are Enabled or Disabled. The Optimal and Fail-Safe default settings are

Disabled.

Instant-On Timeout (Minute) This option specifies the length of a period of system inactivity

while the computer is in Full power on state. When this length of time expires,
the computer enters a low power consumption state, but the computer can
return to full power instantly when any system activity occurs. This option is

only available if supported by the computer hardware. The settings are
Disabled, 1 min. (minute), 2 min, 3 min., 4 min., 5 min., 6 min, 7 min., 8 min., 9
min., 10 min., 11 min., 12 min., 13 min., 14 min, or 15 min. The Optimal and
Fail-Safe default settings are Disabled.

Auxiliary Power Supply Timeout This option specifies the power state that the auxiliary power

supply enters when AMIBIOS places it in a power saving state after the
specified period of display inactivity has expired. The settings are Standby,
Suspend or Disabled. The Optimal and Fail-Safe default settings are Disabled.

Cont’d

Chapter 2 WINBIOS Setup 61

Power Management Setup, Continued

DPMS Video Power Down Mode This option specifies the power state that a DPMS (Display

Power Management Specification)-compliant video subsystem enters when
AMIBIOS places it in a power saving state after the specified period of display
inactivity has expired. The settings are Standby, Suspend or Disabled. The
Optimal and Fail-Safe default settings are Disabled.

Green PC Monitor Power State This option specifies the power state that the green PC-

compliant video monitor enters when AMIBIOS places it in a power saving
state after the specified period of display inactivity has expired. The settings
are Standby, Suspend, or Off. The Optimal and Fail-Safe default settings are

Disabled.

Hard Disk Power Down Mode This option specifies the power conserving state that the hard disk

drive enters after the specified period of hard drive inactivity has expired. The
settings are Disabled, Standby, or Suspend. The Optimal and Fail-Safe default
settings are Disabled.

Hard Disk Timeout (Minute) This option specifies the length of a period of hard disk drive

inactivity. When this length of time expires, the computer enters power­conserving state specified in the Hard Disk Power Down Mode option. The
settings are Disabled, 1 min. (minute), 2 min, 3 min., 4 min., 5 min., 6 min, 7
min., 8 min., 9 min., 10 min., 11 min., 12 min., 13 min., 14 min, or 15 min. The
Optimal and Fail-Safe default settings are Disabled.

Cont’d

MegaRUM PCI Motherboard User’s Guide62

Power Management Setup, Continued

Standby Timeout This option specifies the length of a period of system inactivity while in Full

power on state. When this length of time expires, the computer enters Standby
power state. The settings are Disabled, 1 min. (minute), 2 min, 3 min., 4 min., 5

min., 6 min, 7 min., 8 min., 9 min., 10 min., 11 min., 12 min., 13 min., 14 min, or
15 min. The Optimal and Fail-Safe default settings are Disabled.

Suspend Timeout This option specifies the length of a period of system inactivity while in

Standby state. When this length of time expires, the computer enters Suspend
power state. The settings are Disabled, 1 min. (minute), 2 min, 3 min., 4 min., 5

min., 6 min, 7 min., 8 min., 9 min., 10 min., 11 min., 12 min., 13 min., 14 min, or
15 min. The Optimal and Fail-Safe default settings are Disabled.

Slow Clock Ratio This option specifies the speed at which the system clock runs in power

saving states. The settings are expressed as a ratio between the normal CPU
clock speed and the CPU clock speed when the computer is in the power­conserving state. The settings are 1:1, 1:2, 1:4, 1:8, 1:16, 1:32, 1:64, or 1:128.
The Optimal and Fail-Safe default settings are 1:8.

Cont’d

Chapter 2 WINBIOS Setup 63

Power Management Setup, Continued

IRQ3
IRQ4
IRQ5
IRQ7
IRQ9
IRQ10
IRQ11
IRQ12
IRQ15 When set to Monitor, these options enable event monitoring on the specified

hardware interrupt request line. If set to Monitor and the computer is in a
power saving state, AMIBIOS watches for activity on the specified IRQ line.
The computer enters the Full On state if any activity occurs. AMIBIOS reloads
the Standby and Suspend timeout timers if activity occurs on the specified IRQ
line. The settings for each of these options are Monitor or Ignore. The Optimal
and Fail-Safe default settings are Disabled.

MegaRUM PCI Motherboard User’s Guide64

PCI/PnP Setup

Choose the PCI/PnP Setup icon from the WINBIOS Setup screen to display the
PCI and Plug and Play Setup options, described below.

PCI VGA Palette Snoop When this option is set to Enabled, multiple VGA devices operating on

different buses can handle data from the CPU on each set of palette registers
on every video device. Bit 5 of the command register in the PCI device
configuration space is the VGA Palette Snoop bit (0 is disabled). For example: if
there are two VGA devices in the computer (one PCI and one ISA) and:

VGA Palette Snoop

Bit Setting

Disabled

Enabled

Data read and written by the CPU is only directed to the PCI VGA
device's palette registers.
Data read and written by the CPU is directed to the both the PCI VGA
device's palette registers and the ISA VGA device palette registers,
permitting the palette registers of both devices to be identical.

Action

This option must be set to Enabled if any ISA adapter card installed in the
system requires VGA palette snooping. The Optimal and Fail-Safe default
settings are Disabled.

Allocate IRQ To PCI VGA Set this option to Yes to allow AMIBIOS to allocate an IRQ for the

VGA controller on the PCI bus. When set to No, AMIBIOS will not allocate an
interrupt to the PCI VGA, even if the PCI VGA request an interrupt. The
settings are Yes or No. The Optimal default setting is No. The Fail-Safe default
setting is Yes.

USB Device Latency This option specifies the latency for USB device. The settings are

Disabled, The settings are 32, 64, 96, 128, 160, 192, 224, or 248. The Optimal
and Fail-Safe default settings are Disabled.

Cont’d

Chapter 2 WINBIOS Setup 65

PCI/PnP Setup, Continued

PCI Slot-1 Latency
PCI Slot-2 Latency
PCI Slot-3 Latency
PCI Slot-4 Latency
PCI Slot-5 Latency
PCI Slot-6 Latency These options specify the latency timings (in PCI clocks) for PCI devices

installed in the PCI expansion slots. The settings are 32, 64, 96, 128, 160, 192,
224, or 248. The Optimal default setting is 248. The Fail-Safe default setting is

248.

USB Device IRQ Preference
PCI Slot-1 IRQ Preference
PCI Slot-2 IRQ Preference
PCI Slot-3 IRQ Preference
PCI Slot-4 IRQ Preference
PCI Slot-5 IRQ Preference
PCI Slot-6 IRQ Preference These options specify the IRQ priority for USB and PCI devices

installed in the PCI expansion slots. The settings are Disabled, Auto, IRQ 5,
IRQ 9, IRQ10, IRQ11, IRQ 14, or IRQ15. The Optimal and Fail-Safe default
settings are Auto.

PCI SCSI-1 Latency
PCI SCSI-2 Latency These options specify the latency timings (in PCI clocks) for PCI SCSI

devices. The settings are 32, 64, 96, 128, 160, 192, 224, or 248. The Optimal
and Fail-Safe default settings are Disabled.

Cont’d

MegaRUM PCI Motherboard User’s Guide66

PCI/PnP Setup, Continued

PCI SCSI-1 IRQ Preference
PCI SCSI-2 IRQ Preference
PCI SCSI-3 IRQ Preference
PCI SCSI-4 IRQ Preference
PCI SCSI-5 IRQ Preference
PCI SCSI-6 IRQ Preference These options specify the IRQ priority for USB and PCI devices

installed in the PCI expansion slots. The settings are Disabled, Auto, IRQ 5,
IRQ 9, IRQ10, IRQ11, IRQ 14, or IRQ15. The Optimal and Fail-Safe default

settings are Auto.

Cont’d

Chapter 2 WINBIOS Setup 67

PCI/PnP Setup, Continued

IRQ3
IRQ4
IRQ5
IRQ7
IRQ9
IRQ10
IRQ11
IRQ12
IRQ14
IRQ15 These options specify the bus that the specified IRQ line uses. Use these

options to reserve IRQs for legacy ISA adapter cards. The setting determines if
AMIBIOS should remove an IRQ from the pool of available IRQs passed to
devices that can be configured by the system BIOS. The BIOS reads the ESCD
NVRAM to find all available IRQs. If more IRQs must be removed from the
pool, use these options to reserve the IRQ by assigning an ISA/EISA setting to
it. Onboard I/O is configured by AMIBIOS. All IRQs used by onboard I/O are
configured as PnP. IRQ12 only appears if the PS/2 Mouse Support option in
Advanced Setup is set to Disabled. IRQ14 and 15 are not available if the
onboard PCI IDE is enabled. If all IRQs are set to ISA and IRQ14 and 15 are
allocated to the onboard PCI IDE, IRQ9 is still available because at least one
IRQ must be available for PCI and PnP devices. The settings are ISA, Auto,
PnP, Primary PCI, or Secondry PCI. The Optimal and Fail-Safe default settings
are Auto.

Cont’d

MegaRUM PCI Motherboard User’s Guide68

PCI/PnP Setup, Continued

DMA Channel 0
DMA Channel 1
DMA Channel 3
DMA Channel 5
DMA Channel 6
DMA Channel 7 These options allow you to specify the bus type used by each DMA channel.

The settings are PnP or ISA. The Optimal and Fail-Safe default settings are
PnP.

Reserved ISA Card Memory Size This option specifies the size of the memory area reserved for

legacy ISA adapter cards. The settings are Disabled, 16K, 32K, or 64K. The
Optimal and Fail-Safe default settings are Disabled.

Reserved ISA Card Memory Address This option specifies the beginning address (in hex) of the

reserved memory area. The specified ROM memory area is reserved for use by
legacy ISA adapter cards.

This option does not appear if the Reserved Memory Size option is set to

Disabled.
The settings are C0000, C4000, C8000, CC000, D0000, D4000, D8000, or

DC000. The Optimal and Fail-Safe default settings are N/A.

Chapter 2 WINBIOS Setup 69

Peripheral Setup

Peripheral Setup options are displayed by choosing the Peripheral Setup icon
from the WINBIOS Setup main menu. All Peripheral Setup options are
described in this section.

Onboard Floppy Controller Set this option to Enabled to enable the floppy drive controller on

the motherboard. The settings are Enabled or Disabled. The Optimal and Fail-
Safe default settings are Enabled.

Onboard Primary/Secondary IDE This option specifies the IDE channel used by the onboard

IDE controller. The settings are Disabled, Primary, Secondary, or Both. The
Optimal and Fail-Safe default settings are Disabled.

Onboard IDE Bus Master Set this option to Enabled if the onboard IDE controller is a PCI bus

mastering device. This option is not available if the Onboard

Primary/Secondary IDE option is set to Disabled. The settings are Enabled or
Disabled. The Optimal and Fail-Safe default settings are Enabled.

Onboard Primary Prefetch This option enables the prefetch feature for the specified IDE device

attached to the onboard Primary IDE controller. The settings are Master, Slave,
Both, or Disabled. The Optimal and Fail-Safe default settings are Disabled.

Onboard Secondary Prefetch This option enables the prefetch feature for the specified IDE

device attached to the onboard Secondary IDE controller. The settings are
Master, Slave, Both, or Disabled. The Optimal and Fail-Safe default settings
are Disabled.

Cont’d

MegaRUM PCI Motherboard User’s Guide70

Peripheral Setup, Continued

Offboard PCI/ISA IDE Card This option specifies the expansion slot that the offboard PCI or ISA

IDE Controller adapter card is installed in. The Onboard Primary/Secondary

IDE option must be set to Disabled if this option is set to any value except
Disabled.

The settings are Absent, Primary PCI, Secondry PCI, or ISA. The Optimal and
Fail-Safe default settings are Absent.

Offboard Primary/Secondary This option specifies the IDE channel used by the offboard PCI

controller. The settings are Primary, Secondary, or Both. The Optimal and Fail­Safe default settings are Primary.

Offboard PCI IDE Primary IRQ
Offboard PCI IDE Secondary IRQ These options specify the PCI interrupt used by the primary

and secondary IDE channels if an offboard IDE controller is installed in the
computer. The settings are Disabled, Hardwired, INTA, INTB, INTC, or INTD.
The Optimal and Fail-Safe default settings are Disabled.

Serial Port1 IRQ This option specifies the IRQ (Interrupt Request Line) used by serial port 1.

The settings are IRQ 4 or Disabled. The Optimal default setting is IRQ 4. The
Fail-Safe default setting is Disabled.

Serial Port1 Address This option specifies the base I/O port address for serial port 1. The

settings are 3E8h, 3F8h, or Disabled. The Optimal default setting is 3F8h. The
Fail-Safe default setting is not provided

Cont’d

Chapter 2 WINBIOS Setup 71

Peripheral Setup, Continued

Serial Port1 FIFO This option enables the FIFO buffer for the first serial port. The settings are

Enabled or Disabled. The Optimal default setting is Disabled. The Fail-Safe
default setting is Disabled.

Caution

Do not enable the Serial Port 1 FIFO option if a mouse is

attached to COM1.

Serial Port2 IRQ This option specifies the IRQ (Interrupt Request Line) used by serial port 1.

The settings are IRQ 3, IRQ 4 or Disabled. The Optimal default setting is IRQ

3. The Fail-Safe default setting is Disabled.

Serial Port2 Address This option specifies the base I/O port address for serial port 2. The

settings are 2F8h, 2E8h, or Disabled. The Optimal default setting is 2F8h. The
Fail-Safe default setting is not provided.

Serial Port2 FIFO This option enables the FIFO buffer for the second serial port. The settings

are Enabled or Disabled. The Optimal default setting is Disabled. The Fail-Safe
default setting is not provided.

Caution

Do not enable the Serial Port2 FIFO option if a mouse is

attached to COM2.

Parallel Port IRQ This option specifies the IRQ (Interrupt Request Line) used by the parallel

port. The settings are Disabled, IRQ 5, or IRQ 7. The Optimal default setting is
IRQ 7. The Fail-Safe default setting is Disabled.

Cont’d

MegaRUM PCI Motherboard User’s Guide72

Peripheral Setup, Continued

Parallel Port Address This option specifies the base I/O port address for the parallel port. The

settings are 378h, 278h, or Disabled. The Optimal default setting is 378h. The
Fail-Safe default setting is not provided.

Parallel Port Mode This option specifies the parallel port mode. ECP and EPP are both

bidirectional data transfer modes that adhere to the IEEE P1284 specifications.
The settings are:

Setting Description

Normal
EPP

ECP

Parallel Port DMA Channel This option is only available if the setting for the Parallel Port

The standard AT-compatible parallel port mode is used.
The parallel port can be used with devices that adhere to the Enhanced Parallel

Port (EPP) specification. EPP uses the existing parallel port signals to provide
asymmetric bidirectional data transfer driven by the host device.
The parallel port can be used with devices that adhere to the Extended
Capabilities Port (ECP) specification. ECP uses the DMA protocol to achieve
data transfer rates up to 2.5 Megabits per second. ECP provides symmetric
bidirectional communication.

The Optimal default setting is Normal. The Fail-Safe default setting is not
provided.

Mode option is Extended or ECP. This option sets the DMA channel used by
the parallel port. The settings are DMA CH 1 or DMA CH 3. The Optimal and
Fail-Safe default settings are not provided.

Chapter 2 WINBIOS Setup 73

Section 2 Security

Three icons appear in this part of the WINBIOS Setup screen:

•

Supervisor (Password),

•

User (Password), and

•

Anti-Virus.

Two Levels of Passwords Both the Supervisor and the User icons configure password support. If

you use both, the Supervisor password must be set first.
The system can be configured so that all users must enter a password every

time the system boots or when WINBIOS Setup is executed, using either or
both the Supervisor password or User password.

AMIBIOS Password Support

The Supervisor and User icons activate two different levels of password
security: Supervisor and User.

In addition, the computer can be configured so that all users must enter a
password every time the system boots or when WINBIOS Setup is executed.

MegaRUM PCI Motherboard User’s Guide74

Setting a Password

The password check option is enabled in Advanced Setup by choosing either

Always (the password prompt appears every time the system is powered on) or
Setup (the password prompt appears only when WINBIOS is run). The

password is encrypted and stored in NVRAM.

password. You can either type the password on the keyboard or select each
letter of the password, one at a time, using the mouse. The password does not
appear on the screen when typed. Make sure you write it down. If you forget it,
you must drain NVRAM and reconfigure.

If You Do Not Want to Use a Password Just press <Enter> when the password prompt appears.

Chapter 2 WINBIOS Setup 75

Changing a Password

Select the Supervisor or User icon from the Security section of the WINBIOS
Setup main menu. Enter the password and press <Enter>. The screen does not
display the characters entered. After the new password is entered, retype the
new password as prompted and press <Enter>.

If the password confirmation is incorrect, an error message appears. If the new
password is entered without error, press <Esc>. The password is stored in
NVRAM after WINBIOS completes. The next time the system boots, a
password prompt appears if the password function is present and enabled.

Remember the Password Keep a record of the new password when the password is changed. If

you forget the password, you must erase the system configuration information
in NVRAM (Non-Volatile Random Access Memory).

Anti-Virus

When this icon is selected from the Security section of the WINBIOS Setup
main menu, AMIBIOS issues a warning when any program (or virus) issues a
Disk Format command or attempts to write to the boot sector of the hard disk
drive. The settings are Enabled or Disabled. If enabled, the following appears
when a write is attempted to the boot sector. You may have to type N several
times to prevent the boot sector write.

Boot Sector Write!!!
Possible VIRUS: Continue (Y/N)? _

The following appears after any attempt to format any cylinder, head, or sector
of any hard disk drive via the BIOS INT 13 Hard Disk Drive Service:

Format!!!
Possible VIRUS: Continue (Y/N)? _

MegaRUM PCI Motherboard User’s Guide76

Section 3 Utility

The icons in this section of the WINBIOS Setup main screen permit you to
choose a different set of colors for the WINBIOS Setup screens and to display
all WINBIOS Setup text displayed on the screen in a different language.

If you choose to display the WINBIOS Setup screen text in a different
language, the text for the screen messages written in the selected language
must have been incorporated into the WINBOIS Setup code in AMIBIOS when
the BIOS was manufactured.

Color Set Color Set sets the Setup screen colors.

Language If this feature is enabled, you can choose to display all WINBIOS Setup screen

text in different languages.

Chapter 2 WINBIOS Setup 77

Section 4 Default

The icons in this section permit you to select a group of settings for all
WINBIOS Setup options. Not only can you use these icons to quickly set
system configuration parameters, you can choose a group of settings that have
a better chance of working when the system is having configuration-related
problems.

Original Choose the Original icon to return to the system configuration values present

in WINBIOS Setup when you first began this WINBIOS Setup session.

Optimal You can load the optimal default settings for the WINBIOS by selecting the

Optimal icon. The Optimal default settings are best-case values that should
optimize system performance. If NVRAM is corrupted, the Optimal settings are
loaded automatically.

Fail-Safe You can load the Fail-Safe WINBIOS Setup option settings by selecting the

Fail-Safe icon from the Default section of the WINBIOS Setup main menu.
The Fail-Safe settings provide far from optimal system performance, but are the

most stable settings. Use this option as a diagnostic aid if the system is
behaving erratically.

MegaRUM PCI Motherboard User’s Guide78

3 Programming Flash ROM

All versions of the MegaRUM PCI motherboard use Flash EPROM to store the
system BIOS. The advantage of Flash EPROM is the EPROM chip does not
have to be replaced to update the BIOS. The end user can actually reprogram
the BIOS, using a ROM file supplied by American Megatrends.

Programming the Flash EPROM

Step Action

1 Turn power off. Make sure the computer has a working speaker.
2

Insert the floppy disk with the

3 Press and hold the <Ctrl> and <Home> keys down while turning the power on.

Continue to hold the <Ctrl> and <Home> keys down until the access light on the
floppy drive comes on. It may take 10 seconds or more before this light turns on.

4 Release the <Ctrl> and <Home> keys. AMIBIOS issues a series of beep codes that

indicate that the system BIOS ROM file is being updated.
5 When the flash ROM has successfully been programmed, the computer will reboot.
6 When the computer reboots, check the BIOS Release text at the bottom of the first

boot screen to make sure that the correct BIOS has been used.
7 The error message

NVRAM checksum bad, NVRAM cleared

will appear during the first boot after a successful BIOS ROM update. This

message indicates that the NVRAM area in the system BIOS has been cleared.

AMIBIOS will reconstruct the NVRAM area before the computer boots

completely, so you can safely ignore this message.
8 Load the optional default and save.

S758P.ROM file

in drive A :.

Cont’d

Chapter 3 Programming the Flash ROM 79

Programming the Flash ROM, Continued

Bootblock Actions When you reprogram from system boot, the bootblock code:

Step Action

1 Reads S758P.ROM from the root directory of the floppy disk in

drive A :.
2 Erases the Flash EPROM.
3 Programs the Flash EPROM with the data read from the floppy

disk in drive A :.
4 Generates a CPU reset, rebooting the computer.

The bootblock part of the Flash EPROM is not programmed. Should you
inadvertently open the disk drive door or turn power off to the computer while
programming the Flash EPROM, the bootblock will be unaffected. Simply turn
power back on and begin the Flash ROM programming process again.

S758P.ROM S758P.ROM resides on a floppy disk and contains the updated main BIOS

code. American Megatrends will provide this file when the AMIBIOS for the
MegaRUM PCI ISA motherboard must be updated.

S758P.ROM must be present in the root directory of the floppy disk before the
onboard Flash EPROM can be reprogrammed. The file that has the main BIOS
code must be named S758P.ROM.

Cont’d

MegaRUM PCI Motherboard User’s Guide80

Programming the Flash ROM, Continued

Beep Codes The bootblock code produces a series of beeps during Flash ROM

programming to: signify completion of a step (as shown on the previous
screen), or to signal an error.

Error beeps are arranged in a coded sequence and have different meanings
depending on when they occur. The error beep codes and when they can occur
are:

Number of

Beeps

1 Insert diskette in floppy drive A :.
2 The S758P.ROM file was not found in the root directory of the diskette in

3 Base memory error.
4 Flash program successful.
5 Floppy read error.
6 Keyboard controller BAT command failed.
7 No Flash EPROM detected.
8 Floppy controller failure.

9 Boot Block BIOS checksum error.
10 Flash erase error.
11 Flash Program error.
12 S758P.ROM file size error.

Continuous

beep

floppy drive A :.

Flash Programming successful. Turn power off. Then turn power on again to
restart.

Description

Chapter 3 Programming the Flash ROM 81

Bootblock Code Checkpoint Codes

Code Description

E0h Verify the Boot Block BIOS checksum. Disable the internal cache, DMA,
E1h Initialize the chipset registers. Set the BIOS size to 128K. Make the 512
E2h Test the base 64 KB of system memory. Send the BAT command to the

E3h The main system BIOS is good. Transfer control to the main system BIOS.
E4h Start the memory test.
E5h The memory test is over. Initialize the interrupt vector table.
E6h Initialize the DMA and interrupt controllers.
E7h Determine the CPU internal clock frequency.
E8h Initialize the I/O chipset, if any.
E9h Program the CPU clock-dependent chip set parameters.

EAh Enable the timer and the floppy diskette interrupt. Enable the internal

EDh Initialize the floppy drive.

EEh Look for a diskette in drive A :. Read the first sector of the diskette.
EFh Floppy read error.

F0h Search for S758P.ROM in the root directory of the floppy diskette in drive
F1h The S758P.ROM file is not in the root directory.

F2h Read the FAT table. Analyze the FAT to find the clusters occupied by the
F3h Start reading the S758P.ROM file, cluster by cluster.

F4h The S758P.ROM file is not the correct size.
F5h Disable the internal cache. Raise the Vpp. Enable Flash write and reset the

FBh Detect the flash type.
FCh Start erasing flash blocks.
FDh Program the Flash ROM in the E0000-EFFFFh region.
FEh Start programming Flash at F0000-FFFFF region.

FFh Flash programming is successful. The computer reboots.

and interrupt controllers. Initialize the system timer. Start memory refresh.
KB base memory available.
keyboard controller. Make sure that <Ctrl> <Home> was pressed. Verify the

main system BIOS checksum.

cache. Copy the boot block BIOS and pass control to the boot block BIOS
in the 0000h segment.

A:.

S758P.ROM.

Flash ROM.

MegaRUM PCI Motherboard User’s Guide82

4 Deleting a Password

If you forget the passwords you set up through WINBIOS Setup, the only way
you can restart the computer is to erase the system configuration information
where the passwords are stored. System configuration data is stored in CMOS
RAM, a type of memory that consumes very little power.

Erase Old Password You can drain CMOS RAM power via J33 on the motherboard. J35 is a 2-pin

berg that is normally always OPEN. Perform the following steps to erase the old
password.

Important

Make sure you are properly grounded before

performing the following procedure. You must be

certain that no electrostatic discharge (ESD)

occurs. ESD can ruin your motherboard. Wear an

antistatic wristband attached to a ground. See

“Avoid Static Electricity” on the following screen.

Step Action

1 Turn the computer power off and remove the computer cover.
2 Place a shorting bridge on J35.
3 Turn on computer power for about 10 seconds.
4 Turn the computer off again.
5 Remove the shorting bridge from J35.
6 Turn on computer power again.

Since you drained power from CMOS RAM, all system configuration information
has been erased. You must now re-enter the system configuration information by
running WINBIOS Setup.

Chapter 4 Deleting a Password 83

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.

MegaRUM PCI Motherboard User’s Guide84

A Specifications

Engineering Specifications

Temperature Ranges The following values are ambient temperatures inside the computer case.

The board temperatures reflect the dual Pentium II CPU Heat dissipation
requirements because they will be the hottest motherboard components.
Temperature specifications vary with the CPU frequency.

Frequency Heat

120, 133, 150, 166,
180, 200, 210, 233,
240, 266 MHz or
higher speeds

Sink

YES 200 feet

Airflow

over CPU

per

minute

Airflow

over other

component

s

Not critical 0 ° through

Temperatur

e Range

50 ° C.

ambient

You must make sure that there is adequate air flow over the CPU inside the
case.

Humidity The recommended humidity range for operation of the motherboard is 20% to

80% non-condensing.

Chapter 4 Deleting a Password 85