ATL OEM-I HX User manual

63
OEM-I HX
Motherboard
Product Guide

Index
Arvida Technology Ltd. (ATL) makes no warranty of any kind with regard to this material, including, but not limited to, the
implied warranties of merchantability and fitness for a particular purpose. ATL assumes no responsibility for any errors that
may appear in this document. ATL makes no commitment to update nor to keep current the information contained in this
document. No part of this document may be copied or reproduced in any form or by any means without prior written consent
of ATL.
†Third-party brands and trademarks are the property of their respective owners.
Copyright 1996, ATL Corporation.

Product Description
Figure 1. Motherboard Components
A. Flash memory device M. SRAM sites
B. 1 MB PLCC flash N. Primary power connector
C. Clock battery O. Configuration jumper block
D. Recovery jumper P. Floppy connector
E. COM1 serial port Q. Front panel connector
F. Parallel port connector R. BGA 82430HX
G. PS/2†keyboard connector S. IDE connectors
H. PS/2 mouse connector T. SIMM†sockets
I. COM2 serial port U. PCI add-in connectors
J. Voltage regulator V. PIIX3
K. I/O controller W. ISA add-in connectors
L. Pentiumprocessor
socket

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Feature Summary
• Intel Pentium microprocessor running at 75, 90, 100, 120, 133, 150, and 166 MHz
• ATX form factor motherboard
• Intel 82430HX PCIset
• PC87306B Ultra I/O controller (integrates serial ports, parallel port, floppy disk interface, real time
clock, CMOS RAM, keyboard controller, and support for an IrDA†-compatible infrared interface)
• Support for up to 128 MB of DRAM installed in single in-line memory modules (SIMMs)
• AMIBIOS in a flash memory device that supports system setup and PCI auto-configuration
• Expansion slots for up to six add-in boards
 Three dedicated PCI-bus slots
 Two dedicated ISA-bus slots
 One "combination" slot for either a PCI or an ISA add-in board
• Two RS-232C-compatible 9-pin serial connectors
• One multimode, 25-pin Centronics†-compatible parallel port
• PS/2-style keyboard and mouse connectors
• Password protection for system security
Central Processing Unit
The system is designed to operate with the Intel Pentium microprocessor. The Pentium processor, in
addition to its expanded data and addressing capabilities, includes the following features:
• Ready for next generation OverDriveprocessor
• Backward compatibility with Intel microprocessor architecture
• Onchip numeric coprocessor (compatible with the Intel486DX processor and compliant with
ANSI/IEEE standard
754-1985)
• Onchip 16 KB cache (8 KB for data, 8 KB for code)
• Burst-mode bus cycles
Chapter 3 tells how to upgrade the CPU.
Memory
The motherboard supports base (conventional) and extended memory. Operating systems such as
MS-DOS†, OS/2†, UNIX†, and all application programs use base memory. For better performance,
OS/2 and UNIX as well as many
MS-DOS applications use extended memory. For the system memory map, see Chapter 5.
The motherboard supports up to 128 MB of DRAM. DRAM is implemented through 72-pin single in-
line memory modules (SIMMs). The motherboard contains four SIMM sockets. Chapter 3 describes
how much memory and which type of SIMM you can install to get the total amount of DRAM you want.

Cache Memory
The Pentium microprocessor includes 16 KB of cache on the chip. The 82430HX PCIset includes a
cache controller that supports direct-mapped cache memory and supports a second level cache that
uses up to 512 KB of Synchronous Pipeline Burst SRAM.
IDE Peripheral Interface
The motherboard provides a high speed, 32-bit PCI/IDE interface. The PCI/IDE interface supports:
• Up to four PCI/IDE hard drives on the PCI bus
• PIO Mode 3 and Mode 4 support
• Logical block addressing (LBA) of hard drives larger than 528 MB
• Extended Cylinder Head Sector (ECHS) translation modes
• ATAPI devices (such as CD-ROMs) on both IDE interfaces
System I/O
The I/O controller (PC87306B) integrates the functions for the serial ports, parallel port, diskette
drives, and keyboard. This component provides:
• Multimode bi-directional parallel port
 Standard mode: Centronics-compatible operation
 High-speed mode: support for enhanced capabilities port (ECP) and enhanced parallel port
(EPP)
• Two RS-232C 116550A-compatible 9-pin serial ports
• Integrated real time clock with an accuracy of ±13 minutes/year
• A 242-byte battery-backed CMOS RAM
• Integrated 8042 compatible keyboard controller
• Flexible IRQ and DMA mapping to support Windows†95
• Support for an IrDA-compatible infrared interface. The infrared interface supports data transfer
rates of up to 115 Kbaud with either half- or full-duplex operation. In full-duplex mode, both the
transmitter and receiver are enabled simultaneously for higher throughput.
• Industry standard diskette drive controller that supports 720 KB, 1.44 MB, and 2.88 MB 3.5-inch
drives (at 135 tracks per inch); and 360 KB and 1.2 MB 5.25-inch drives
System BIOS
The system BIOS, from American Megatrends Incorporated (AMI), provides ISA and PCI compatibility.
The BIOS is contained in a flash memory device. The BIOS provides the power-on self test (POST),
the system Setup program, a PCI and IDE auto-configuration utility, and BIOS recovery code.
The system BIOS is always shadowed. Shadowing allows any BIOS routines to be executed from fast
32-bit onboard DRAM instead of from the slower 8-bit flash device.
PCI Auto-configuration
The PCI auto-configuration utility works in conjunction with the Setup program to support using PCI
add-in boards in the system. When you turn on the system power after installing a PCI board, the
BIOS automatically configures interrupts, DMA channels, I/O space, and so on. Since PCI add-in

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boards use the same interrupt resources as ISA add-in boards, you must specify the interrupts used
by ISA boards in the Setup program. Chapter 2 tells how to use the Setup program. The PCI auto-
configuration program complies with version 2.1 of the PCI BIOS specification.
IDE Auto-configuration
If you install an IDE drive in the system, the IDE auto-configuration utility automatically detects and
configures the drive for operation in the system. This utility eliminates the need to enter the Setup
program after you install an IDE drive.
ISA Plug and Play Capability
This provides auto-configuration of Plug and Play ISA cards and resource management for legacy
(non Plug and Play) ISA cards when used with the ISA Configuration Utility (ICU) or a Plug and Play
compatible operating system like Windows 95.
BIOS Upgrades
Because the BIOS is stored in a flash memory device, you can easily upgrade the BIOS without
having to disassemble the system. The flash upgrade process can be done by running a utility from a
diskette or hard disk, or over a network.
For information about the latest BIOS update, contact your service representative.
Expansion Slots
The board has two dedicated 16-bit ISA/AT†-compatible and three dedicated PCI-compatible
expansion slots. One expansion slot is a "combination" slot and can be used by either a PCI or an
ISA board, enabling you to install a maximum of six add-in boards.
System Security
The BIOS provides a password option that you can enable through the Setup program (see
Chapter 2).
Keyboard/Mouse Controller
The I/O controller stores the keyboard and mouse controller code. The board uses
PS/2-style connectors for the keyboard and mouse.
Real-Time Clock and CMOS RAM
The I/O controller provides a real-time clock and CMOS RAM. Chapter 3 provides information about
replacing the battery.
You can set the time for the clock and the CMOS values by using the system BIOS Setup program,
described in Chapter 2.

Fan Connector
The board contains a connector for a CPU fan. Refer to Chapter 5 for the locations and pinout of the
fan connector.
Speaker
The board has a connector for an offboard speaker. Chapter 5 shows the location and pinout for the
speaker connector.

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Using The Setup Program
This chapter tells how to use the Setup program that is built into the BIOS. The Setup program makes
it possible to change configuration information (such as the types of peripherals that are installed) and
the boot-up sequence for the system. The Setup information is stored in CMOS random access
memory (RAM) and is backed up by a battery when power is off.
If the board does not operate as described here, see Chapter 4 for problem descriptions and error
messages.
If you want to go into the Setup program, reboot the board and press <F1> as soon as you see the
message “Press <F1> Key if you want to run SETUP.” You have about five seconds to press <F1> to
enter Setup before the boot process continues.
Record the Setup Configuration
To make sure you have a reference to the Setup values for your system, we recommend you write
down the current settings and keep this record up-to-date.
Setup Menu Overview
The Setup program initially displays the Main menu screen. In each screen there are options for
modifying the system configuration. Select a menu screen by pressing the left <←> or
right <→> arrow keys. Use the up <↑> or down <↓> arrow keys to select items in a screen. Use the
<Enter> key to select an item for modification. For certain items, pressing <Enter> brings up a
subscreen. After you have selected an item, use the arrow keys to modify the setting.
Setup Menu Overview
Setup Menu
Screen Description
Main For setting up and modifying basic
options, such as time, date, diskette
drives, and hard drives.
Advanced For modifying the more advanced
features, such as peripheral
configuration and advanced chipset
configuration.
Security For specifying passwords that can be
used to limit access to the system.
Exit For saving or discarding changes.
Floppy Options For configuring diskette drives.
Primary/
Secondary IDE
Master/Slave
Configuration
For configuring IDE hard drives.
Boot Options For modifying options that affect the
system boot up, such as the boot
sequence.
Peripheral
Configuration For modifying options that affect the serial ports, the parallel port, and the

disk drive interfaces.
Advanced
Chipset
Configuration
For modifying options that affect
memory and system busses.
Plug and Play
Configuration For modifying options that affect the system’s Plug and Play capabilities.
Overview of the Setup Keys
The following keys have special functions in the BIOS Setup program.
Overview of the Setup Keys
Setup Key Description
<F1> Pressing the <F1> key brings up a help
screen for the current item.
<Esc> Pressing the <Esc> key takes you back
to the previous screen. Pressing
<Esc> in the Main, Advanced, Security,
or Exit screen allows you to Exit
Discarding Changes (see later in this
chapter).
<Enter> Pressing the <Enter> key selects the
current item or option.
<↑>Pressing the up arrow <↑> key
changes the selection to the previous
item or option.
<↓>Pressing the down arrow <↓> key
changes the selection to the next item
or option.
<←> <→>Pressing the left <←> or right arrow
<→> keys in the Main, Advanced,
Security, or Exit menu screens
changes the menu screen. Pressing
either key in a subscreen does nothing.
<F5> Pressing the <F5> key allows you to
Load Setup Defaults (see later in this
chapter).
<F6> Pressing the <F6> key allows you to
Discard Changes (see later in this
chapter).
<F10> Pressing the <F10> key allows you to
Exit Saving Changes (see later in this
chapter).
Main BIOS Setup Screen
This section describes the Setup options found on the main menu screen. If you select certain
options from the main screen (e.g., Primary IDE Master), the Setup program switches to a subscreen
for the selected option.

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System Date
Specifies the current date. Select the month from a pop-up menu.
System Time
Specifies the current time.
Floppy Options
When selected, this pops up the Floppy Options subscreen.
Primary IDE Master
Reports if an IDE device is connected to the Primary IDE Master interface. When selected, this brings
up the Primary IDE Master Configuration subscreen.
Primary IDE Slave
Reports if an IDE device is connected to the Primary IDE Slave interface. When selected, this brings
up the Primary IDE Slave Configuration subscreen.
Secondary IDE Master
Reports if an IDE device is connected to the Secondary IDE Master interface. When selected, this
brings up the Secondary IDE Master Configuration subscreen.
Secondary IDE Slave
Reports if an IDE device is connected to the Secondary IDE Slave interface. When selected, this
brings up the Secondary IDE Slave Configuration subscreen.
Language
Specifies the language of the text strings used in the Setup program and the BIOS. The options are
any installed languages.
Boot Options
When selected, this brings up the Boot Options subscreen.
Video Mode
Reports the video mode. There are no options.
Mouse
Reports if a mouse is installed or not. There are no options.
Base Memory
Reports the amount of base memory. There are no options.