American Megatrends Apollo IV User manual

Apollo IV Pentium
PCI ISA MotherboardGuide
MAN-772
11/21/97

Apollo IV PCI Pentium ISA Motherboard User’s Guide
ii
© Copyright 1997 American Megatrends, Inc.
All rights reserved.
American Megatrends, Inc.
6145F Northbelt Parkway
Norcross, GA 30071
This publication contains proprietary information which is protected by copyright. No part of this publication may be reproduced, transcribed,
stored in a retrieval system, translated into any language or computer language, or transmitted in any form whatsoever without the prior written
consent of the publisher, American Megatrends, Inc.
Limited Warranty
Buyer agrees if this product proves to be defective, that American Megatrends, Inc. is only obligated to replace or refund the purchase price of
this product at American Megatrends’ discretion according to the terms and conditions on the motherboard warranty card. American Megatrends
shall not be liable in tort or contract for any loss or damage, direct, incidental or consequential. Please see the Warranty Registration Card
shipped with this product for full warranty details.
Limitations of Liability
In no event shall American Megatrends be held liable for any loss, expenses, or damages of any kind whatsoever, whether direct, indirect,
incidental, or consequential, arising from the design or use of this product or the support materials provided with the product.
Trademarks
Intel and Pentium are registered trademarks of Intel Corporation.
MS-DOS, Microsoft Word, and Microsoft are registered trademarks of Microsoft Corporation. Microsoft Windows 95 and Windows NT are
trademarks of Microsoft Corporation.
IBM, AT, VGA, PS/2, OS/2, and EGA are registered trademarks of International Business Machines Corporation. XT and CGA are trademarks
of International Business Machines Corporation.
Fujitsu is a registered trademark of Fujitsu America, Inc.
Motorola is a registered trademark of Motorola Corporation.
Hitachi is a registered trademark of Hitachi America, Ltd.
NEC is a registered trademark of NEC Corporation.
Samsung is a registered trademark of Samsung Electronics Corporation.
Siemens is a trademark of Siemens Corporation.
Mitsubishi is a registered trademark of Mitsubishi Electronics of America.
Micron is a registered trademark of Micron Corporation.
SCO, UnixWare, and Unix are registered trademarks of The Santa Cruz Operation, Inc.
Toshiba is a registered trademark of Kabushiki Kaisha Toshiba.
VESA is a trademark of the Video Electronics Standards Association.
All other brand and product names are trademarks or registered trademarks of their respective companies.
Revision History
11/21/97 Initial release.

Preface iii
Preface
To the OEM Thank you for purchasing the high performance American Megatrends
Apollo IV PCI Pentium ISA motherboard. This product is a state of the art
motherboard that includes the famous AMIBIOS. It is assumed that you have
also licensed the rights to use the American Megatrends documentation for
the American Megatrends Apollo IV 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 Apollo IV motherboard. It explains how to assemble a system
based on the Apollo IV 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 you need help installing, configuring, or running this product, call
American Megatrends technical support at 770-246-8645. You can also send
questions to tech support at:
[email protected].
American Megatrends BBS The American Megatrends BBS permits you to access technical
information about American Megatrends motherboard, peripheral, and BIOS
products. Product Engineering Change Notices, Tech Tips, and technical
documentation are available on the BBS. Some parts of the BBS are not
accessible to all callers. Call American Megatrends Technical Support at 770-
246-8645 to find out how to access the BBS.
Phone Numbers The BBS requires no parity, eight data bits, and one stop bit. The
characteristics of the BBS phone numbers are:
Phone Number Characteristics
770-246-8780 28,800 baud rate. Supports v.34.
770-246-8781 28,800 baud rate. Supports v.34.
770-246-8782 Supports HST and v.42.
770-246-8783 Supports HST and v.42.
Web Site We invite you to access the American Megatrends world wide web site at:
http://www.ami.com.

Apollo IV PCI Pentium ISA Motherboard User’s Guide
iv
Packing List
You should have received the following:
• an Apollo IV Pentium PCI ISA motherboard,
• a diskette containing the DMI Wizard 95 utility,
• the American Megatrends DMI Wizard 95 User’s Guide,
• an optional USB cable and mounting bracket,
• two serial cables,
• one parallel cable,
• a Warranty Card, and
• the American Megatrends Apollo IV Pentium ISA Motherboard User's Guide.
Warning
The pinout for the optional USB Cable Box is:
Pin 1 Red VCC
Pin 2 Green Data +
Pin 3 White Data -
Pin 4 Black Ground
Please make sure that the USB cable is correctly installed. Incorrect
installation will damage the motherboard.
Static Electricity
The Apollo IV motherboard can easily be damaged by static electricity. Make
sure you take appropriate precautions against static electric discharge:
• wear a properly-grounded wristband while handling the motherboard or any other
electrical component,
• touch a grounded anti-static surface or a grounded metal fixture before handling
the Apollo IV motherboard,
• handle system components by the mounting bracket, if possible.
Batteries Make sure you dispose of used batteries according to the battery
manufacturer’s instructions. Improper use of batteries may cause an
explosion. Make sure you follow the battery manufacturer’s instructions about
using the battery. Replace used batteries with the same type of battery or an
equivalent recommended by the battery manufacturer.

Chapter 1 Hardware Installation 1
1Hardware Installation
Overview
The American Megatrends Apollo IV PCI Pentium ISA motherboard includes
the following features.
CPU The CPU socket on the motherboard is a 321-pin ZIF socket. A switching
voltage regulator is required. You can install any of the following CPUs:
CPU Manufacturer Supported CPU Speeds
Intel® Pentium P55C 166, 200, and 233 MHz
Intel Pentium P54C with
MMX™ technology 90, 100, 120, 133, 150, 166, and 200 MHz
AMD® K6-166 166 MHz
AMD K6-200 200 MHz
AMD K6-233 233 MHz
AMD K5-PR90 90 MHz
AMD K5-PR100 100 MHz
AMD K5-PR120 90 MHz
AMD K5-PR133 100 MHz
AMD K5-PR150 105 MHz
AMD K5-PR166 116 MHz
AMD K5-PR200 133 MHz
MMX Technology This motherboard supports CPUs that include support for Intel MMX
technology. MMX technology allows you to experience richer video, audio,
digital imaging and communications when running the latest generation of
multimedia software on your computer. Cont’d

Apollo IV PCI Pentium ISA Motherboard User’s Guide
2
Overview, Continued
Chipset The Apollo IV PCI Pentium ISA baby-AT size motherboard uses an Intel
430TX chipset, including CPU interface controller, advanced cache
controller, integrated DRAM controller, synchronous ISA bus controller, PCI
local bus interface, and an integrated power management unit. The Intel
430TX chipset supports intelligent diagnostic and power management
through features such as DMI support.
Expansion Slots The motherboard includes:
• three 16-bit ISA expansion slots and
• four 32-bit PCI expansion slots.
The PCI local bus throughput can be up to 132 megabytes per second.
L1 Internal Cache The Intel Pentium on the motherboard has an 8 KB data cache and an 8
KB instruction cache.
L2 Secondary Cache The motherboard has 512 KB of pipeline burst direct-mapped,
WriteBack L2 secondary cache memory. Up to 256 MB of system memory
can be cached.
Supported Standards The Apollo IV motherboard supports:
• DMI,
• the Intel DPMA (Dynamic Power Management Architecture,
• Concurrent PCI V2.0 and V2.1, and
• USB (Universal Serial Bus).
Switching Voltage Regulator This motherboard includes a switching voltage regulator that
significantly reduces the CPU and voltage regulator temperature. This voltage
regulator is also fully upgradable to the next generation of Socket 7 CPUs.
These new CPUs will require more electrical current and will generate more
heat. Cont‘d

Chapter 1 Hardware Installation 3
Overview, Continued
CPU Thermal Monitor The Apollo IV motherboard includes a special heat sensor under the
CPU that monitors the CPU temperature. This heat sensor generates an SMI
(System Management Interrupt) when the CPU temperature is too hot. The
SMI can be set to turn on the external cooling fan and/or lower the CPU clock
frequency. You are waned that the CPU is overheating. The CPU is returned
to normal operating conditions when the CPU temperature returns to normal.
This feature can only be implemented if a power supply with a soft-off power
controller is installed in the computer. See the American Megatrends DMI
Wizard 95 User’s Guide for additional information about this feature.
SDRAM The Apollo IV motherboard provides two 168-pin DIMM system memory
sockets that support SDRAM (Synchronous Dynamic Random Access
Memory). SDRAM increases the CPU-to-memory data transfer rate to 528
MBs. This rate is normally 264 MBs if EDO DRAM is installed. The
integrated I2C controller optimizes the memory timing parameters.
System Memory The motherboard supports up to 256 MB of system memory mounted on the
motherboard as follows:
Type of System
Memory Socket Type of System Memory Supported System Memory
four 72-pin SIMM
sockets Fast Page Mode or EDO DRAM 8 MB, 16 MB, 32 MB, 64 MB, or 128 MB
two 168-pin DIMM
sockets EDO DRAM or SDRAM 8 MB, 16 MB, 32 MB, 64 MB, or 128 MB
Cont’d

Apollo IV PCI Pentium ISA Motherboard User’s Guide
4
Overview, Continued
PC 97 Compliant The Apollo IV motherboard is fully compliant with the Microsoft PC 97
specification at both the hardware and the BIOS levels.
PC 97 is a set of hardware, bus, and device design requirements specified by
Microsoft that make computers easier to use. PC 97 supports cooperation
between the operating system, the hardware, and the applications software.
Key PC 97 features include:
• Plug and Play compatibility,
• power management support for configuring and managing all system
components
• 32-bit device drivers, and
• standard installation procedures for Microsoft Windows 95 and Windows
NT.
AMIBIOS Features This motherboard has an AMIBIOS system BIOS on a Flash ROM with
built-in AMIBIOS Setup. AMIBIOS features include:
• IDE block mode and 32-bit data transfer support,
• IDE Programmed I/O modes 0, 1, 2, 3, and 4 support,
• PS/2 mouse support,
• IDE LBA mode support,
• APM (Advanced Power Management) and Flash BIOS hooks,
• EPA Green PC-compliant,
• PCI and Plug and Play (PnP) support, and
• DIM (Device Initialization Manager) support,
• DMI (Desktop Management Interface) support,
• can boot from a CD-ROM drive,
• automatically detects system memory, cache memory, and hard disk drive
parameters,
• Intel NSP-compliant,
• Fast ATA IDE mode programming and ATAPI support,
• Boot sector virus protection,
• instant-on support,
• automatically configures PnP and PCI devices. Cont’d

Chapter 1 Hardware Installation 5
Overview, Continued
BIOS Shadowing The system BIOS is always copied from ROM to RAM for faster execution.
The end user can shadow 16 KB ROM segments from C0000h – DCFFFh.
IDE The Apollo IV motherboard has two 40-pin IDE connectors onboard that
support up to four IDE drives (hard disk drives, CD-ROM drives, or tape
drives). The integrated PCI bus master enhanced IDE controller is on the PCI
local bus. The IDE controller supports the Ultra DMA/33 protocol, which
doubles the hard disk drive data transfer rates specified in the ATA-2
standards to 33 MBs while maintaining full backward compatibility with
existing PIO mode 3, PIO mode 4, and DMA mode 2 devices.
Fast ATA The motherboard supports the Fast ATA specification using PIO mode 4 and
multiword DMA mode 2.
Ultra DMA/33 This motherboard includes an integrated enhanced IDE PCI bus master IDE
controller that supports the Ultra DMA/33 protocol. The Ultra DMA/33
protocol permits data transfer rates up to 33 MBs. Ultra DMA/33 also reduces
the CPU workload and permits increased CPU utilization. Ultra DMA/33 is
completely backward-compatible with older DMA standards.
Floppy The Apollo IV motherboard has an onboard floppy controller that supports up
to two 360 KB, 720 KB, 1.2 MB, 1.44 MB, or 2.88 MB floppy drives.
Parallel Port The Apollo IV motherboard has an onboard ECP and EPP-capable parallel
port connector.
Serial Ports The Apollo IV motherboard has two onboard serial port connectors and two
16550 UART serial ports.
Keyboard The Apollo IV motherboard Includes a standard DIN keyboard connector.
Cont’d

Apollo IV PCI Pentium ISA Motherboard User’s Guide
6
Overview, Continued
Mouse The Apollo IV motherboard includes a 5-pin berg mouse connector.
USB The Apollo IV motherboard has two 4-pin USB connectors. USB allows
future generations of USB-compliant peripheral devices to be automatically
detected and configured through a single port. USB uses Plug and Play
technology. All USB peripherals are automatically detected and configured.
The AMIBIOS on this motherboard provides complete USB system BIOS
support.
Power Connectors The Apollo IV motherboard has three power supply connectors.
RTC/CMOS RAM A real time clock and 128 bytes of CMOS RAM with a battery backup is
provided on the motherboard.
Power Management Power management services include:
• Green PC LED,
• power management signal to Green PC-aware power supplies,
• automatic IDE and video power down,
• monitor blanking,
• SMI (System Management Interrupt) support,
• APM, and
• system stop clock.
PCI Slots The motherboard conforms to the PCI Version 2.1 specification. The
concurrent PCI architecture of this motherboard allows faster CPU, PCI, and
ISA bus transactions for faster and smoother multimedia performance. This
motherboard allows you to install either PCI V2.0 or PCI V2.1-comaptible
adapter cards
The PCI slots are automatically configured by the AMIBIOS. The PCI slots
operate synchronously with the CPU clock, as follows:
CPU External Clock Frequency PCI Expansion Slot Frequency
66 MHz 33 MHz
60 MHz 30 MHz
Onboard I/O The Apollo IV Pentium ISA motherboard includes:
• two 40-pin IDE connectors on the PCI bus that support up to four IDE
drives,
• a 34-pin floppy drive connector,
• two 10-pin serial port connectors (with 16550 UARTs),
• a 26-pin parallel port connector with ECP and EPP support,
• an infrared connector,
• two USB connectors that support an optional riser card that permit high
speed Plug and Play connection to USB-compliant external peripheral
devices,
• a keyboard connector, and
• a PS/2 mouse connector. Cont’d