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Technical Information Manual
IntelliStation M Pro
Professional Workstation (Type 6889)
Note
Before using this information and the product it supports, be sure to read the general information under
Appendix E, “Notices and Trademarks” on page 62.
Second Edition (September 1998)
The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with
local law: INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION “AS IS” WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied
warranties in certain transactions, therefore, this statement may not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information
herein; these changes will be incorporated in new editions of the publication. IBM may make improvements and/or changes in the
product(s) and/or the program(s) described in this publication at any time.
This publication was developed for products and services offered in the United States of America. IBM may not offer the products,
services, or features discussed in this document in other countries, and the information is subject to change without notice. Consult
your local IBM representative for information on the products, services, and features available in your area.
Requests for technical information about IBM products should be made to your IBM reseller or IBM marketing representative.
 Copyright International Business Machines Corporation 1998. All rights reserved.
Note to U.S. Government Users — Documentation related to restricted rights — Use, duplication or disclosure is subject to
restrictions set forth in GSA ADP Schedule Contract with IBM Corp.
Contents
Preface . . . . . .
Manual Style . . .
Related Publications
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Chapter 1. System Overview . . . . . . . . . . . . . . .
Hardware Features . . . . . . . . . . . . . . . . . . . . . .
Software Features . . . . . . . . . . . . . . . . . . . . . .
System Software
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BIOS . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plug and Play . . . . . . . . . . . . . . . . . . . . . .
POST . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration/Setup Utility Program . . . . . . . . .
Advanced Power Management . . . . . . . . . . . .
Advanced Configuration and Power Interface (ACPI)
Flash Update Utility Program . . . . . . . . . . . . .
Diagnostic Programs . . . . . . . . . . . . . . . . . .
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Euro Sign Support Information
Operating System Support . . . . . . . . . . . . . . . .
Device Drivers . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2. System Board Features . .
Microprocessor . . . . . . . . . . . . . . .
Chip Set Control . . . . . . . . . . . . . .
System Memory . . . . . . . . . . . . .
PCI-to-ISA Bridge . . . . . . . . . . . .
System I/O and Power Management .
AGP Interface . . . . . . . . . . . . . .
IDE Bus Master Interface
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USB Interface . . . . . . . . . . . . . .
Super Input/Output Controller . . . . . . .
Diskette Interface . . . . . . . . . . . .
Parallel Port . . . . . . . . . . . . . . .
Serial Ports . . . . . . . . . . . . . . . .
Keyboard and Mouse Ports . . . . . .
Real-Time Clock . . . . . . . . . . . . .
Video Subsystem . . . . . . . . . . . . . .
Video Device Drivers . . . . . . . . . .
Audio Subsystem . . . . . . . . . . . . . .
Ethernet Subsystem . . . . . . . . . . . .
Small Computer System Interface (SCSI)
System Management Controller . . . . .
System Board Switches . . . . . . . . . .
System Board Jumper . . . . . . . . . . .
Physical Layout of System Board
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Input/Output Connectors . . . . . . . . . .
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Chapter 3. Adapters and Internal Drives
Adapters . . . . . . . . . . . . . . . . . . . .
Wake on LAN Adapters
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Internal Drives
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 Copyright IBM Corp. 1998
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Chapter 4. Power Supply
Power Input . . . . . . . .
Power Output . . . . . . .
Output Protection . . . . .
Power Connectors . . . .
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Chapter 5. Physical Specifications
Chapter 6. System Compatibility
Hardware Compatibility . . . . . .
Hardware Interrupts . . . . . . .
APIC Controller . . . . . . . . .
Diskette Drives and Controller .
Hard Disk Drives and Controller
Software Compatibility . . . . . . .
Software Interrupts . . . . . . .
Machine-Sensitive Programs
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Appendix A. Connector Pin Assignments
ISA Bus Connector . . . . . . . . . . . . . . .
PCI Bus Connectors . . . . . . . . . . . . . .
AGP Bus Connector . . . . . . . . . . . . . .
IDE Connectors . . . . . . . . . . . . . . . . .
Diskette Drive Connector . . . . . . . . . . .
SCSI 50-pin Connector . . . . . . . . . . . .
SCSI 68-pin Connectors . . . . . . . . . . . .
System Memory Connectors . . . . . . . . .
USB Connectors . . . . . . . . . . . . . . . .
Parallel Port Connector . . . . . . . . . . . .
Serial Port Connectors . . . . . . . . . . . . .
Keyboard and Mouse Port Connectors . . .
Monitor Port Connector . . . . . . . . . . . .
Ethernet Connector . . . . . . . . . . . . . . .
Appendix B. System Address Maps
System Memory Map
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Input/Output Address Map
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DMA I/O Address Map . . . . . . . . .
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Appendix C. IRQ and DMA Channel Assignments
Appendix D. Error Codes
POST Error Codes . . . . .
Beep Codes . . . . . . . . .
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Appendix E. Notices and Trademarks
Notices . . . . . . . . . . . . . . . . . .
Year 2000 Readiness and Instructions
Trademarks
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References . . . . . . . . .
General Sources
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World Wide Web Sources
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65
Contents
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Tables
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System Resource Assignments for the IDE Interface . . . . . . . . . . .
System Resource Assignments for the Diskette Interface . . . . . . . .
System Resource Assignments for the Parallel Port . . . . . . . . . . .
System Resource Assignments for the Serial Ports . . . . . . . . . . . .
System Resource Assignments for the Keyboard and Mouse . . . . . .
System Resource Assignments for the Real-Time Clock . . . . . . . . .
System Resource Assignments for the Audio Controller . . . . . . . . .
System Resource Assignments for the Ethernet Controller . . . . . . .
System Resource Assignments for the System Management Controller
Microprocessor Speed (Switches 1-4)
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ROM Recovery (Switch 5) . . . . . . . . . . . . . . . . . . . . . . . . . .
System Board Ethernet Control (Switch 6) . . . . . . . . . . . . . . . . .
Privileged Access Password Control (Switch 7) . . . . . . . . . . . . . .
Diskette Drive Write Access (Switch 8) . . . . . . . . . . . . . . . . . . .
CMOS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diskette Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IDE and SCSI Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Output for 330-Watt Power Supply . . . . . . . . . . . . . . . . .
System Board Power Connectors . . . . . . . . . . . . . . . . . . . . . .
ISA-Bus Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PCI-Bus Adapters (Per Slot) . . . . . . . . . . . . . . . . . . . . . . . . .
AGP Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal SCSI Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keyboard Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin Assignments for the 4-Pin Power Connectors . . . . . . . . . . . . .
Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heat Output (Approximate) . . . . . . . . . . . . . . . . . . . . . . . . . .
Acoustical Noise Emission Values . . . . . . . . . . . . . . . . . . . . . .
IO APIC Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5-Inch Diskette Drive Reading, Writing, and Formatting Capabilities .
Pin Assignments for the ISA Bus Connectors . . . . . . . . . . . . . . .
Pin Assignments for the PCI Bus Connectors . . . . . . . . . . . . . . .
Pin Assignments for the AGP Bus Connector . . . . . . . . . . . . . . .
Pin Assignments for the IDE Connectors . . . . . . . . . . . . . . . . . .
Pin Assignments for the Diskette Drive Connector . . . . . . . . . . . .
Pin Assignments for the SCSI 50-pin Connector
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Pin Assignments for the SCSI 68-pin Connector
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Pin Assignments for the DIMM Connectors
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Pin Assignments for the USB Connectors . . . . . . . . . . . . . . . . .
Pin Assignments for the Parallel Port Connector . . . . . . . . . . . . .
Pin Assignments for the Serial Port Connectors . . . . . . . . . . . . . .
Pin Assignments for the Keyboard and Mouse Connectors . . . . . . .
Pin Assignments for the Monitor Connector . . . . . . . . . . . . . . . .
Pin Assignments for the Ethernet Connector . . . . . . . . . . . . . . . .
System Memory Map (Fixed Address Ranges) . . . . . . . . . . . . . .
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 Copyright IBM Corp. 1998
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Input/Output Address Map
DMA I/O Addresses . . . .
IRQ Channel Assignments
DMA Channel Assignments
POST Error Codes
. . . .
Beep Codes
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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System Board
. . . . . . . . . . . . . . . .
Rear Connector Panel and Expansion Slots
ISA Bus Connector
. . . . . . . . . . . . .
PCI Bus Connector . . . . . . . . . . . . .
AGP Bus Connector . . . . . . . . . . . . .
IDE Connector . . . . . . . . . . . . . . . .
Diskette Drive Connector . . . . . . . . . .
SCSI 50-pin Connector . . . . . . . . . . .
SCSI 68-pin Connector . . . . . . . . . . .
System Memory (DIMM) Connector . . . .
USB Connector
. . . . . . . . . . . . . . .
Parallel Port Connector . . . . . . . . . . .
Serial Port Connector . . . . . . . . . . . .
Keyboard and Mouse Port Connector . . .
Monitor Connector . . . . . . . . . . . . . .
Ethernet Connector . . . . . . . . . . . . .
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Tables
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vii
Preface
This Technical Information Manual provides information on IBM IntelliStation M Pro (Type 6889)
computers. The manual provides in-depth information on how these computers work, and is intended for
developers who want to provide hardware and software products to operate with these computers. Users
of this publication should have an understanding of computer architecture and programming concepts.
Manual Style
In this manual, the use of the letter “h” indicates a hexadecimal number. Also, when numerical modifiers
such as “K,” “M,” and “G” are used, they typically indicate powers of 2, not powers of 10. For example, 1
KB equals 1 024 bytes (210), 1 MB equals 1 048 576 bytes (220), and 1 GB equals 1 073 741 824 bytes
(230).
When expressing hard disk storage capacity, powers of 10 are used (1 MB equals 1 000 KB, or 1 000 000
bytes). The value is determined by counting the number of sectors and assuming that every sector equals
512 bytes. Depending on the operating system and other system requirements, the storage capacity
available to the user might vary.
Warning: The term reserved describes certain signals, bits, and registers that should not be changed.
Use of reserved areas can cause compatibility problems, loss of data, or permanent damage to the
hardware. When the contents of a register are changed, the state of the reserved bits must be preserved.
When possible, read the register first and change only the bits that must be changed.
Some signals are abbreviated. A minus sign in front of a signal indicates that the signal is active low. No
sign in front of a signal indicates that the signal is active high.
viii
 Copyright IBM Corp. 1998
Related Publications
In addition to this manual, the following IBM publications provide information about the operation of the
IntelliStation M Pro (Type 6889). To order these publications, call 1-800-879-2755 in the U.S. and Puerto
Rico. In other countries, contact an IBM reseller or IBM marketing representative.
Ÿ IntelliStation M Pro User Guide
This hardcopy publication comes with your computer and is also available on the Ready-to-Configure
Utility Program CD that comes with your computer. It contains information on setting up, configuring,
operating, and maintaining your computer. Also included are warranty information, instructions for
diagnosing and solving problems, and information on how to obtain help and service.
Ÿ Installing Options in Your IntelliStation M Pro
This publication is available in Adobe .PDF format on the Ready-to-Configure Utility Program CD that
comes with your computer as well as on the World Wide Web at:
http://www.pc.ibm.com/support
It contains instructions for installing options in the computer.
Ÿ Understanding Your IntelliStation M Pro
This publication, available on the Ready-to-Configure Utility Program CD that comes with your
computer, includes general information about using computers and detailed information about the
features of IntelliStation M Pro computers. The publication is available on the Ready-to-Configure
Utility Program CD that comes with the computer. If the computer comes with IBM-preinstalled
software, this publication is also included in the preinstalled software package.
Ÿ About Your Software
This publication (provided only with computers that have IBM-preinstalled software) contains
information about the preinstalled software package.
Ÿ Adaptec SCSI Documentation
This documentation, which is provided on the Ready-to-Configure Utility Program CD that comes with
IntelliStation M Pro computers, includes information on the SCSI interface, including instructions for
installing and configuring SCSI devices.
Ÿ Hardware Maintenance Manual
This publication contains information on IntelliStation M Pro computers for trained service technicians.
It can be found on the World Wide Web at :
http://www.pc.ibm.com/support
This publication can also be ordered from IBM. To purchase a copy, refer to the "Getting Help,
Service, and Information" section in the IntelliStation M Pro User Guide.
Preface
ix
x
Technical Information Manual
Chapter 1. System Overview
Chapter 1. System Overview
The IntelliStation M Pro is a versatile product designed to provide state-of-the-art computing power with
room for future growth.
Hardware Features
The major features of IntelliStation M Pro computers are:
Ÿ Intel Pentium II microprocessor with MMX technology
Ÿ Support for up to 1024 MB (1 GB) of system memory (SDRAM)
Ÿ 512 KB L2 cache memory integrated into microprocessor
Ÿ PCI, ISA, and AGP buses
Ÿ Busmaster Ultra DMA-33 IDE controller
Ÿ Integrated Adaptec AIC-7895 Dual Channel Ultra Wide SCSI PCI controller
Ÿ EIDE or Ultra Wide SCSI hard disk drive
Ÿ 32X Max IDE CD-ROM drive1
Ÿ 3.5-inch, 1.44 MB diskette drive
Ÿ One of the following graphics adapters is preinstalled:
– Intergraph Intense 3D Pro 3400 PCI graphics adapter
– Matrox Millennium G200 AGP graphics adapter
– Matrox Millennium II AGP graphics adapter
– STB GLyder MAX-2+ AGP graphics adapter
Ÿ Integrated Crystal 4235 audio subsystem (supports SoundBlaster and Microsoft Windows Sound
System applications) with built in speaker
Ÿ Integrated Intel EtherExpress Pro/100B Ethernet subsystem with Wake on LAN
Ÿ System Management
– RPL (remote program load) and DHCP (dynamic host configuration protocol)
– Integrated Wake on LAN controller
– Alert on LAN
– Automatic power-on startup sequence
– Update POST and BIOS over the network
– DMI (Desktop Management Interface) BIOS and DMI software
– Store POST hardware test results
– Remote reset from LAN
– Integrated system management controller
1
Variable read rate. Actual playback speed will vary and is often less than the maximum possible.
 Copyright IBM Corp. 1998
1
Chapter 1. System Overview
– Built-in system management hardware (temperature sensors, fan-speed monitor, chassis-intrusion
detector, power supply and processor voltage monitor, and power-switch bypass)
Ÿ Input/Output Features
– One 25-pin, ECP/EPP parallel port
– Two 9-pin, 16550 UART serial ports
– Two 4-pin, USB (universal serial bus) ports
– One 6-pin, keyboard port
– One 6-pin, mouse port
– One 15-pin, monitor port (on graphics adapter)
– Three 3.5-mm, audio jacks (line out, line in, and microphone)
– One Ethernet RJ-45 port
Ÿ Expansion
– Six drive bays (three of which are occupied by the preinstalled diskette drive, hard disk, and
CD-ROM drives)
– Six expansion slots (four dedicated PCI, one shared ISA/PCI, and one dedicated AGP). One of
these slots is occupied by the preinstalled graphics adapter
– Second microprocessor socket
– Four memory sockets (one or more of which can be occupied by preinstalled memory)
– Support for additional internal and external SCSI devices (the number of internal devices that can
be installed is limited by the number of available drive bays and power and cooling requirements)
– Support for optional Adaptec ARO-1130 PCI RAIDport adapter
Several model variations are available for IntelliStation M Pro computers. The following list describes
some of model varations:
Ÿ Microprocessor speed
Ÿ Hard disk type and capacity
Ÿ Amount of system memory preinstalled
Ÿ Type of video adapter preinstalled
2
Technical Information Manual
Chapter 1. System Overview
Software Features
This section describes the system software, device drivers, and operating system support provided with
IntelliStation M Pro computers.
System Software
System software refers to the following:
Ÿ Basic input/output system (BIOS)
Ÿ Plug and Play
Ÿ Power-on self-test (POST)
Ÿ Configuration/Setup Utility program
Ÿ Advanced Power Management (APM)
Ÿ Flash update utility program
Ÿ Diagnostic programs
BIOS
IntelliStation M Pro computers have an IBM BIOS. Support is provided for the following features:
Ÿ PCI bus, according to the PCI BIOS Specification (Version 2.1)
Ÿ Plug and Play, according to the Plug and Play BIOS Specification (Version 1.0a)
Ÿ Advanced Power Management, according to the APM BIOS Interface Specification (Version 1.2)
Ÿ Advanced Configuration and Power Interface (ACPI) BIOS (Version 1.0)
Ÿ Desktop Management BIOS, according to DMI Specification 2.0a
Ÿ IDE LBA to allow access to hard disks with a capacity greater than 527 MB
Ÿ Intel 82440BX core chipset
Ÿ Intel Ethernet BIOS
Ÿ Crystal audio setup
Ÿ Initialization of National Semiconductor N97307 I/O chip, with Plug and Play support
Ÿ Bootable CD-ROM
Ÿ DBCS code (for Japanese systems only)
Ÿ Wake on LAN
Ÿ RPL (Remote Program Load) and DHCP (Dynamic Host Configuration Protocol)
Ÿ Flash over LAN
Ÿ Alternate boot sequence
Ÿ Enable/disable of system board Ethernet controller
Ÿ Enable/disable of system board SCSI controller
Chapter 1. System Overview
3
Chapter 1. System Overview
Plug and Play
IntelliStation M Pro computers conform to the following:
Ÿ Plug and Play BIOS Specification (Version 1.0a)
Ÿ Plug and Play BIOS Specification, Errata and Clarifications (Version 1.0a), as released by Microsoft
Ÿ Plug and Play BIOS Extension Design Guide (Version 1.0)
Ÿ Guide to Integrating the Plug and Play BIOS Extensions with System BIOS (Version 1.1)
Ÿ Plug and Play Kit for DOS and Windows
4
Technical Information Manual
Chapter 1. System Overview
POST
IntelliStation M Pro computers use IBM power-on self-test (POST) software with initialization code added
for the Intel Pentium II microprocessor, the Intel 82440BX core chipset, the National Semiconductor
PC97307 I/O chip, the Adaptec AIC-7895 Dual Channel Ultra Wide SCSI PCI controller, and the Intel
82558 Ethernet chip.
POST software locates any hardware problems or configuration changes. If an error occurs while POST
is running, an error code in the form of a text message displays on the screen. For a description of POST
error codes, see “POST Error Codes” on page 59. For further information on POST, refer to the
IntelliStation M Pro User Guide.
Configuration/Setup Utility Program
The Configuration/Setup Utility program provides menus for viewing and changing selections for devices
and I/O ports, current date and time, start options, system security, advanced setup, ISA legacy resources,
and advanced power management. The Configuration/Setup Utility program also provides system
summary and product data screens which contain information specific to the computer model being used.
Refer to the IntelliStation M Pro User Guide for further information on the Configuration/Setup Utility
program.
Advanced Power Management
Advanced Power Management (APM) is a feature that reduces power consumption when components of
the computer (or the entire computer system) are not in use. When enabled, APM initiates reduced-power
modes for the microprocessor, monitor, hard disk drive, or entire system after a specified period of
inactivity is reached.2
APM is implemented in IntelliStation M Pro computers according to the APM BIOS Interface Specification
(Version 1.2). For more information on APM, refer to Understanding Your IntelliStation M Pro and the
IntelliStation M Pro User Guide.
Advanced Configuration and Power Interface (ACPI)
IntelliStation M Pro computers support Advanced Configuration and Power Interface (ACPI). ACPI, when
enabled, allows the operating system to control the power management features of your computer. Not all
operating systems support ACPI. Refer to your operating system documentation to determine if ACPI is
supported.
Flash Update Utility Program
A stand-alone utility program is available to support user-initiated flash code updates. This utility program
updates the BIOS code in flash memory. IntelliStation M Pro computers also support BIOS updating over
the LAN (Flash-over-LAN). The Flash-over-LAN function requires the use of the integrated system board
Ethernet.
The flash update utility program is available at http://www.pc.ibm.com/us/intellistation on the World Wide
Web. (Select Support at this Web site.) The flash update utility program is also available through the PC
Company Bulletin Board Service in files that can be downloaded onto a diskette. Instructions for using the
flash update utility program will be available in a README file included in the downloaded files. Refer to
the IntelliStation M Pro User Guide for further information.
2
SCSI hard disk drives do not support APM.
Chapter 1. System Overview
5
Chapter 1. System Overview
Diagnostic Programs
An IBM Enhanced Diagnostics CD comes with IntelliStation M Pro (Type 6889) computers. The CD
provides programs that you can run to diagnose hardware and some software problems. Several utility
programs that provide helpful information about your computer are also included. The user interface for
running these diagnostics and utilities is provided by WaterGate Software's PC Doctor.
These diagnostics help to isolate your computer hardware from software that was preinstalled (or that you
have installed) on your hard disk. The programs run independent of the operating system, and must be
run either from the CD or from a diskette that can be created from the CD or downloaded from the World
Wide Web. These diagnostics are generally used when other methods are not accessible or have not
been successful in isolating a problem suspected to be hardware related.
If necessary, you can also download the latest image of the diagnostics from the World Wide Web. For
instructions on downloading the image and creating a bootable Enhanced Diagnostics diskette, as well as
other information on the diagnostic programs that come with IntelliStation M Pro (Type 6889) computers,
refer to the IntelliStation M Pro User Guide.
Euro Sign Support Information
The Euro Sign is the name given to the proposed currency symbol of the European Union. According to
the European Commission, the Euro will exist as a currency beginning 1 January 1999, but will only
gradually move into general use with the introduction of coins and notes in 2002.
IBM and various other personal computer industry companies plan to support the Euro Sign on products
released in 1999. For support information on products released prior to that date, see the appropriate
Web site for your product.
For your computer to support the Euro Sign, a proper combination of both hardware (computer, keyboard,
and printer) and software (operating systems, application programs, and device drivers) is required.
There are many Web sites that provide Euro Sign information and support (some are listed below). First,
determine the computer hardware and software you are using. Then, visit the Web sites that apply to your
system for the latest Euro Sign information and support. In many cases, updates are available for Euro
Sign support. These updates can be downloaded and installed on your computer.
Ÿ
Ÿ
Ÿ
http://www.adobe.com
http://www.ibm.com
http://www.microsoft.com/europe/euro
(The “euro product update” is available for Windows 95 and Window NT)
Operating System Support
Although a variety of operating systems can be used with IntelliStation M Pro computers, full function is
provided only with Windows NT 4.0. (Some models also fully support Windows 95, Windows 98, and
Windows NT 3.5.) When operating systems other than these are used, IntelliStation M Pro computers will
work, but without all of the advanced functions. For a list of operating systems that are compatible with
IntelliStation M Pro computers, refer to the About Your Software and the IBM online compatibility report
on the World Wide Web at http://www.pc.ibm.com/us/intellistation/tech_library.html.
Note: Windows NT 4.0 and various support programs are preinstalled in some IntelliStation M Pro
computers. Refer to About Your Software for a detailed description of the preinstallation package.
Also, a Ready-to-Configure Utility Program CD is included with all models. The
Ready-to-Configure Utility Program CD contains applications and device driver support for the
preinstalled operating system (if applicable), and several other operating systems.
6
Technical Information Manual
Chapter 1. System Overview
Device Drivers
IntelliStation M Pro computers come with device drivers to support built-in features and several operating
systems. The device drivers are preinstalled in models that come with IBM-preinstalled software. In
addition, the device drivers are included on the Ready-to-Configure Utility Program CD that is provided
with IntelliStation M Pro computers. The device drivers are also available on the World Wide Web at
http://www.pc.ibm.com/us/intellistation. (Select Support at this Web site.)
Chapter 1. System Overview
7
Chapter 2. System Board Features
Chapter 2. System Board Features
This section provides information about system board features. For an illustration of the system board,
refer to “Physical Layout of System Board” on page 22.
For a list of features provided with IntelliStation M Pro computers, refer to “Hardware Features” on
page 1.
Microprocessor
IntelliStation M Pro computers have an Intel Pentium II microprocessor with MMX technology. This is a
high-performance processor that is fully compatible with previous generations of Intel microprocessors. It
has separate core supply and I/O supply voltages. A voltage regulator on the system board converts the
5.0 V provided by the power supply to the core voltage required by the microprocessor.
The Pentium II microprocessor with MMX technology features the following:
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Optimization for 32-bit software
Operation at a lower voltage level than previous microprocessors
64-bit data bus
32 KB L1 cache (split into 16 KB write-through code cache and 16 KB write-back data cache)
100 MHz bus speed
Power management features
Math coprocessor
Support for MMX technology (boosts the processing of graphic, video, and audio data)
512 KB L2 cache, operating at 1/2 of microprocessor core speed
More information on the Pentium processor with MMX technology can be found on the World Wide Web at
http://www.intel.com.
The microprocessor is packaged on a card with a 242-pin edge connector.
IntelliStation M Pro (Type 6889) computers support dual microprocessors, which means microprocessor
performance can be upgraded by adding a second microprocessor to the system board. If a second
microprocessor is added, the speed of the second microprocessor must be the same as that of the
primary microprocessor.
For information on replacing a microprocessor, installing an upgrade, or installing a second
microprocessor, refer to Installing Options in Your IntelliStation M Pro.
8
 Copyright IBM Corp. 1998
Chapter 2. System Board Features
Chip Set Control
IntelliStation M Pro computers use the Intel 82440BX chip set. The primary functions of this chipset are:
Ÿ Provides a bridge between the PCI bus and the microprocessor bus (For information on the PCI bus,
see “PCI-to-ISA Bridge” on page 10.)
Ÿ Provides a DRAM controller and datapath
Ÿ Provides an interface for the Accelerated Graphics Port (AGP)
The 82440BX module is fully compliant with PCI Local Bus Specification (Version 2.1).
System Memory
The system memory interface in IntelliStation M Pro computers is controlled by the Intel 82440BX chip set
module. (Refer to “Chip Set Control” for information on this module.) There are four dual inline memory
module (DIMM) sockets on the system board. The DIMM sockets are powered by +3.3 volts. This
voltage allows for low-power operation and supports 64-Mbit technology. For DIMM socket pin
assignments, refer to “System Memory Connectors” on page 46.
The system board supports:
Ÿ Up to 1024 MB (1 GB) of system memory
Ÿ A maximum of 256 MB of system memory in each DIMM socket
Ÿ DIMM heights up to 2.5 inches
Almost any configuration of DIMMs is acceptable. However, DIMMs must have the following
characteristics:
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Must
Must
Must
Must
Must
be 168-pin, 100 MHz, 3.3v industry standard memory DIMMs
be 64- or 72-bit wide, 100 MHz, SDRAM (synchronous dynamic random access memory) DIMMs
be 32, 64, 128, or 256 MB in size (either single-sided or double-sided configurations)
be industry standard, 168-pin, +3 V, serial PD type
have gold-lead tabs
Also, note the following:
Ÿ Fill each DIMM connector sequentially, starting with DIMM socket 0.
Ÿ Do not mix registered and nonregistered DIMMs.
Ÿ 64-bit wide and 72-bit wide modules and ECC (error correcting code) modules can be mixed, but they
will configure as 64-bit wide.
Ÿ If SDRAM ECC and SDRAM nonparity DIMMs are mixed, they will configure as nonparity.
Ÿ To enable ECC, all installed memory must be of the ECC type.
Ÿ The IntelliStation M Pro does not support EDO memory.
Ÿ There are two types of memory DIMMs available for the IntelliStation M Pro computer: Registered
Memory technology and Unregistered Memory technology. Registered Memory DIMMs are not
compatible with Unregistered Memory DIMMs.
Ÿ The 256 MB ECC Memory DIMM is Registered Memory technology.
Ÿ The only Registered Memory DIMM supported on the IntelliStation M Pro is the 256 MB with ECC
(IBM OBI Part Number 01K1132)
Ÿ The 32 MB, 64 MB, and 128 MB DIMMs are Unregistered Memory technology.
Ÿ When adding additional memory DIMMs, be sure that all installed memory DIMMs are of the same
type. For example:
– All installed DIMMs are Registered Memory
- or -
Chapter 2. System Board Features
9
Chapter 2. System Board Features
– All installed DIMMs are Unregistered Memory
Note: Single inline memory modules (SIMMs) are not supported in IntelliStation M Pro computers.
PCI-to-ISA Bridge
The PIIX4 chipset module provides the bridge between the peripheral component interconnect (PCI) and
industry standard architecture (ISA) buses. The chip is used to convert PCI bus cycles to ISA bus cycles.
The PCI bus is compliant with PCI Local Bus Specification 2.1. The PCI bus runs at a frequency of 33
MHz. The ISA bus is permanently set to the PCI bus speed divided by four (8.33 MHz).
For information on PCI and ISA bus expansion connectors, see Appendix A, “Connector Pin Assignments”
on page 36.
System I/O and Power Management
The Intel PIIX4 chipset module that provides the PCI-to-ISA bridge also provides many of the subsystems
of the ISA bus. These subsystems are:
Ÿ An ISA-compatible interrupt controller that provides the function of two cascaded 82C59 interrupt
controllers
Ÿ Three counters, equivalent to an 82C54 programmable interval timer
Ÿ The function of two 82C37 DMA controllers with seven independent DMA channels (four 8-bit
channels and three 16-bit channels)
Ÿ Power management features
For further information on the PIIX4 chipset module, refer to “Chip Set Control” on page 9.
AGP Interface
AGP (accelerated graphics port) is a high performance interface directed at 3D graphical display
applications. The AGP signals are similar to PCI bus signals with performance extensions added
specifically for video functions.
AGP basically creates a preferred access port for video devices into system memory. This allows efficient
use of memory resources by mapping system memory as special memory for video use only. One of the
primary applications for this memory mapping is for video texture data storage. Video textures are
basically templates that are stored in memory and then applied to pixel data at the time of rendering.
These textures are typically used in 3D display applications. AGP allows this memory to be mapped from
main memory when needed, thus providing potential for high speed 3D rendering while minimizing system
cost.
The AGP hardware interface is based on the 64-bit PCI definition with the following features added:
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Support for deeply pipelined read and writes
Demultiplexed address and data, allowing almost 100% bus efficiency
Timing support for 133 MHz data transfer rates, yielding burst data rates of over 500 MB/sec.
Point-to-point signaling protocol for high speed operation
3.3 V only operation
The AGP connector on the system board is defined as a 124-pin high density custom connector for use by
AGP enabled video devices only. It does not support generic PCI devices. For configuration purposes,
an AGP video adapter will appear as a PCI device attached to the corresponding PCI bus.
10
Technical Information Manual
Chapter 2. System Board Features
IDE Bus Master Interface
The system board incorporates a PCI-to-IDE interface that complies with the AT attachment interface.
This interface includes the original IDE (ATA) interface with extensions for Ultra DMA-33. The Intel PIIX4
chipset module contains the controller for the PCI Bus Master IDE interface. The PIIX4 module allows
concurrent operations on the PCI and IDE buses. (Refer to “Chip Set Control” on page 9 for further
information on the PIIX4 module.)
The primary and secondary IDE buses are routed to two connectors on the system board. A total of four
IDE or EIDE devices can be attached to the two IDE system board connectors using ribbon cables.
(However, the number of devices that can be installed is limited by the number of available drive bays.)
The IDE devices receive their power through separate, four-position power cables containing +5 V, +12 V,
and ground (GND) voltage.
On each IDE connector, one device is designated as the primary (master) device, and the other device is
designated as the secondary (subordinate) device. These designations are determined by switch or
jumper settings on each device. A functional primary device must be present on each IDE connector for a
secondary device to be recognized on that same IDE connector. Care must be taken to ensure that the
jumpers on the devices installed in the system correctly identify them as either primary or secondary
devices. Otherwise, some of the devices might not be recognized by the system. There is no
performance impact between a primary device and a secondary device of the same type on the same IDE
connector.
A bootable IDE or EIDE hard disk drive can be installed on either IDE connector. A bootable hard disk is
one which has an active partition with an operating system installed on it.
PCI or ISA IDE expansion adapters are not supported.
For a list of devices that can be installed in IntelliStation M Pro computers, refer to “Internal Drives” on
page 25.
The following table shows the typical system resource assignments for the IDE interface.
Table 1. System Resource Assignments for the IDE Interface
Configuration
ROM
RAM
I/O Address (Hex)
IRQ
DMA
IDE 1
None
None
01F0-01F7, 03F6, 03F7 bits 6:0
14
None
IDE 2
None
None
0170-0177, 0376-0377
15
None
Notes:
1. IDE 1 is the default for the primary channel.
2. IDE 2 is the default for the secondary channel.
When the computer is started, the resource assignments are subject to change during POST.
Two 40-pin connectors are provided on the system board for the IDE interface. For information on
connector pin assignments, see “IDE Connectors” on page 42.
Chapter 2. System Board Features
11
Chapter 2. System Board Features
USB Interface
The Intel PIIX4 chipset module contains the controller for the USB interface in IntelliStation M Pro
computers. (Refer to “Chip Set Control” on page 9 for information on the PIIX4 module.) Two USB ports
are provided on the rear connector panel of the computers. A USB-enabled device can be attached to
each port, and if that device is a hub, multiple peripheral devices can be attached to the hub and be used
by the system. Plug and Play technology is used to recognize installed devices. The USB port functions
at speeds of up to 1.5 Mbits per second or 12 Mbits per second. Data is transferred in either
asynchronous or synchronous mode. The system does not support a keyboard attached to either of the
USB ports as a boot device.
The USB is compliant with Universal Host Controller Interface Design Guide 1.0. Features provided by
USB technology include:
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Support for up to 127 physical devices
Connections of up to five meters in length from host to hub or hub to hub
Support for hot pluggable devices
Support for concurrent operation of multiple devices
Support for different device bandwidths
Guaranteed bandwidth and low latencies appropriate for telephony, audio, etc.
Wide range of packet sizes
Eight-signal USB cable
The external interface for the USB ports consists of two, 4-pin connectors. For information on connector
pin assignments, see “USB Connectors” on page 49.
12
Technical Information Manual
Chapter 2. System Board Features
Super Input/Output Controller
Control of the integrated input/output (I/O) ports, diskette drive, and real-time clock is provided by the
National Semiconductor PC97307 chip. This chip, which is compatible with Plug and Play ISA
Specification 1.0a, supports and implements the following features:
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Diskette interface
Parallel port
Serial ports
Keyboard and mouse ports
General-purpose I/O ports
Real-time clock
Diskette Interface
IntelliStation M Pro computers support a maximum of two diskette drives and one tape backup drive.
(Refer to “Internal Drives” on page 25 for more information.) The following is a list of devices that the
diskette interface will support:
Ÿ
Ÿ
Ÿ
Ÿ
1.44 MB, 3.5-inch diskette drive
1.44 MB, 3.5-inch, 3-mode drive for Japan
5.25-inch, 1.2 MB diskette drive
1 Mbps, 500 Kbps, or 250 Kbps internal tape drive
Note: A 2.88 MB, 3.5-inch diskette drive is not supported.
The following table shows the typical system resource assignments for the diskette interface.
Table 2. System Resource Assignments for the Diskette Interface
Resource
Resource Assignment
ROM
None
RAM
None
I/O Address (Hex)
03F0–03F5 (diskette channel 0)
03F7, bit 7 (diskette change)
IRQ
6
DMA
2
When the computer is started, the resource assignments are subject to change during POST.
One shrouded, 34-pin, berg-strip connector is provided on the system board for the diskette drive. For
information on connector pin assignments, see “Diskette Drive Connector” on page 43.
Chapter 2. System Board Features
13
Chapter 2. System Board Features
Parallel Port
One parallel port is integrated into the system board. Support for extended capabilities port (ECP),
enhanced parallel port (EPP), and standard parallel port (SPP) modes is provided. These modes are
selected through the Configuration/Setup Utility program, with the default mode set to SPP. The ECP and
EPP modes are compliant with IEEE 1284.
The following table shows the typical system resource assignments for the parallel port.
Table 3. System Resource Assignments for the Parallel Port
Configuration
ROM
RAM
I/O Address (Hex)
IRQ
DMA
LPT1
None
None
03BC–03BE
7
33
LPT2
None
None
0378-037F
7
33
LPT3
None
None
0278-027F
5
33
Note: The default setting for the parallel port is LPT1. When the computer is started, the resource
assignments are subject to change during POST.
The external interface for the parallel port is a 25-pin, female, D-shell connector. For information on
connector pin assignments, see “Parallel Port Connector” on page 49.
Serial Ports
The serial port subsystem consists of two universal asynchronous receiver/transmitters (UARTs) that are
PC16550A- and NS16450-compatible. The serial ports include a 16-byte data first-in first-out (FIFO)
buffer and have programmable baud rate generators. The UARTs function independently of one another,
and both can be used in normal mode, which is inclusive of modem control circuitry. UART2 function is
determined at boot time via the Configuration/Setup Utility program and can only be altered by changing
setup and rebooting the computer.
The following table shows the typical system resource assignments for the serial ports.
Table 4. System Resource Assignments for the Serial Ports
Configuration
ROM
RAM
I/O Address (Hex)
IRQ
DMA
COM1
None
None
03F8-03FF
4
None
COM2
None
None
02F8-02FF
3
None
COM3
None
None
03E8-03EF
4
None
COM4
None
None
02E8-02EF
3
None
The default setting for serial port 1 is COM1. For serial port 2, the default setting is COM2. When the
computer is started, the resource assignments are subject to change during POST.
The external interface for the serial ports consists of two, 9-pin, male, D-shell connectors. For information
on connector pin assignments, see “Serial Port Connectors” on page 50.
3
ECP/EPP mode only.
14
Technical Information Manual
Chapter 2. System Board Features
Keyboard and Mouse Ports
The keyboard-and-mouse subsystem is controlled by a general purpose, 8-bit microcontroller. The
controller consists of 256 bytes of data memory and 2 KB of read-only memory (ROM).
The controller has two logical devices; one controls the keyboard, and the other controls the mouse. The
keyboard has two fixed I/O addresses and a fixed IRQ line (IRQ1). The keyboard can operate without a
companion mouse, but the mouse can only operate with its companion keyboard. The mouse has a fixed
IRQ line (IRQ12), but it does not have its own I/O address; it relies on the addresses used by the
keyboard.
The following table shows the typical system resource assignments for the keyboard and mouse.
Table 5. System Resource Assignments for the Keyboard and Mouse
Configuration
ROM
RAM
I/O Address (Hex)
IRQ
DMA
Keyboard and mouse
None
None
0060, 0064
1 (keyboard)
12 (mouse)
None
Keyboard only
None
None
0060, 0064
1
None
Note: Keyboard and mouse is the default.
When the computer is started, the resource assignments are subject to change during POST.
For an external interface, the keyboard and mouse each have a 6-pin connector. For information on
connector pin assignments, see “Keyboard and Mouse Port Connectors” on page 50.
Real-Time Clock
The low-power, real-time clock provides a time-of-day clock and a calendar. The clock is accurate to
+/− 12 minutes per year. The clock settings are maintained by an external battery source at +2.4 volts.
The life expectancy of the battery is approximately 2.25 years.
An external crystal is used to drive the real-time clock, and the battery is used to maintain the state of the
CMOS RAM when the power to the computer is turned off. (The system has 242 bytes of battery-backed
CMOS RAM in two banks.) If the CMOS RAM becomes corrupted and the system will not boot, a jumper
is included on the system board to clear CMOS RAM so that POST can set CMOS RAM to factory default
values.
The following table shows the typical system resource assignments for the real-time clock.
Table 6. System Resource Assignments for the Real-Time Clock
Resource
Resource Assignment
ROM
None
RAM
None
I/O Addresses (Hex)
0070—0077
IRQ
8
DMA
None
When the computer is started, the resource assignments are subject to change during POST.
Chapter 2. System Board Features
15
Chapter 2. System Board Features
Video Subsystem
A high-performance, high-resolution graphics adapter provides the video subsystem and monitor
connection for IntelliStation M Pro (Type 6889) computers. The type of graphics adapter installed varies
with computer model. One of the following is preinstalled in an expansion slot:
Ÿ An Intergraph Intense 3D Pro 3400 PCI graphics adapter
Ÿ A Matrox Millennium G200 AGP graphics adapter (designed for the AGP expansion slot)
Ÿ A Matrox Millennium II AGP graphics adapter (designed for the AGP expansion slot)
Ÿ An STB GLyder MAX-2+ AGP graphics adapter (designed for the AGP expansion slot)
The monitor connector is located on the graphics adapter.
Ÿ The Intergraph Intense 3D Pro 3400 PCI graphics adapter, installed in a PCI expansion slot, is a
high-performance graphics adapter with a graphics engine, a texture engine, a 16 MB frame buffer,
and 16 MB of texture memory. It also provides an expansion connector to attach an optional
geometry accelerator PCI adapter for further performance enhancement. It has two external
connectors.
– The round, 5-pin connector is a stereo sync output jack. This jack provides a connection to the
emitter module of a pair of LCD shutter glasses.
– The blue, 15-pin connector is a monitor port.
Ÿ The Matrox Millennium G200 AGP graphics adapter is a high-performance, graphics adapter with 8
MB of memory expandable to 16 MB. It has a blue, 15-pin monitor connector.
Ÿ The Matrox Millennium II AGP graphics adapter is a high-performance, graphics adapter with 8 MB of
memory expandable to 16 MB. It has a blue, 15-pin monitor connector.
Ÿ The STB GLyder MAX-2+ AGP graphics adapter is an entry 3D graphics adapter (balances 2D and
3D performance) with 8 MB of memory. This adapter has a 15-pin monitor connector.
Video Device Drivers
Video device drivers for the graphics adapter are provided on the Ready-to-Configure Utility Program CD
that comes with IntelliStation M Pro computers. Instructions for installing the device drivers are provided
on the Ready-to-Configure Utility Program CD in README files that correspond to the operating system
being used.
Video device drivers have already been installed in computers that come with IBM-preinstalled software.
16
Technical Information Manual
Chapter 2. System Board Features
Audio Subsystem
IntelliStation M Pro (Type 6889) computers have an integrated Crystal 4235 audio subsystem that
supports SoundBlaster and Microsoft Windows Sound System applications. An internal speaker and three
audio ports are also provided. These features provide the ability to play back and capture sound and
music, enabling the user to enjoy sound with multimedia applications.
The integrated audio controller provides the following:
Ÿ ISA bus interface
Ÿ 16-bit codec/mixer
The audio ports in IntelliStation M Pro (Type 6889) computers are industry-standard, 3.5 mm (1/8")
mini-jacks and are located on the rear connector panel of the computer. A description of the audio ports
follows.
Ÿ Audio Line Out: This jack, which is located on the rear connector panel, is used to send audio signals
from the computer to external devices, such as headphones, stereo-powered speakers with built-in
amplifiers, multimedia keyboards, or the Audio Line In jack on a stereo system. In order to hear
audio, one of these external devices must be connected to the Audio Line-Out port on the computer.
Note: The internal speaker in the computer is disabled when an external speaker is connected to the
Line-Out port on the computer. There is no playback capability through the internal speaker.
Ÿ Audio Line In: This jack is used to send audio signals from an external device (such as a CD player
or stereo) to the computer so that the signals can be recorded on the hard disk. (However, the input
level must be reduced accordingly using the mixer provided in the computer operating system.)
Ÿ Microphone: This jack is used to connect a microphone to the computer so that voice or other sounds
can be recorded on the hard disk. This jack can also be used by speech-recognition software.
Note: If interference or speaker feedback is experienced while recording, reducing the microphone
recording volume (gain) might help to alleviate the problem.
The following table shows the system resource assignments for the audio controller.
Table 7. System Resource Assignments for the Audio Controller
Resource
Resource Assignment
ROM
None
RAM
None
I/O Address (Hex)
220-22F, 388-38B, 534-537
IRQ
5
DMA
1, 5
When the computer is started, the resource assignments are subject to change during POST.
Chapter 2. System Board Features
17
Chapter 2. System Board Features
Ethernet Subsystem
The system board contains an Intel EtherExpress Pro/100B Ethernet controller with Wake on LAN. This
subsystem is a high-performance Ethernet LAN interface that provides both 10Base-T and 100Base-TX
connectivity using a single RJ-45 connector. The Ethernet controller, which is a Plug and Play device and
a PCI 2.1 Bus Master, features the following:
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
IEEE 802.3 compliance, 10 and 100 Mbps
Support for 10Base-T and 100Base-TX with PCI bus interface
Viewable media access control (MAC) address
3 Kbyte transmit FIFO and 3 Kbyte receive FIFO
Auto-negotiation
Full duplex capability
Full NOS support
The system board also includes a discrete Wake on LAN controller (MagPack). This controller can be
disabled in the Configuration/Setup Utility program.
Note: For compliance with FCC Class A radiation limits, all Ethernet cabling attached to IntelliStation M
Pro computers must be Class 5, regardless of the speed (10 Mbit or 100 Mbit).
The following table shows the system resource assignments for the Ethernet controller.
Table 8. System Resource Assignments for the Ethernet Controller
Resource
Resource Assignment
ROM
None
RAM
None
I/O Address (Hex)
Plug and Play
IRQ
Plug and Play
DMA
None
When the computer is started, the resource assignments are assigned during POST.
The external interface for the Ethernet feature is an 8-pin, RJ-45 connector. For information on connector
pin assignments, see “Ethernet Connector” on page 52.
Small Computer System Interface (SCSI)
IntelliStation M Pro (Type 6889) computers have an integrated Adaptec AIC-7895 Dual Channel Ultra
Wide SCSI PCI controller that provides an interface through which the computer can communicate with
SCSI-compatible devices, such as hard disk drives, CD-ROM drives, tape drives, read-and-write optical
drives, scanners, and printers. The controller has two channels (A and B). Channel A provides a 16-bit,
68-pin connector on the system board for connecting internal SCSI devices. Channel B provides a 16-bit,
68-pin connector on the system board that is attached with a ribbon cable to an external SCSI connector
at the rear of the chassis. Channel B also provides an 8-bit, 50-pin connector for connecting internal
devices. Some models have a preinstalled SCSI hard disk drive connected to the 68-pin connector for
Channel A.
The Adaptec AIC-7895 Dual Channel Ultra Wide SCSI PCI controller also supports the Adaptec RAIDport
connection with an extension to expansion slot 2. RAID (redundant array of independent disks) is a group
of disk drives that collectively act as a single storage system that provides increased performance and can
tolerate the failure of a drive without losing data. With this option, your computer supports RAID modes 0,
18
Technical Information Manual
Chapter 2. System Board Features
1, or 5. The RAID expansion is available with the addition of an optional Adaptec ARO-1130 PCI
RAIDport adapter to expansion slot 2.
For further information on the SCSI interface, including instructions for installing and configuring SCSI
devices, refer to the SCSI documentation provided on the Ready-to-Configure Utility Program CD that
comes with IntelliStation M Pro computers. Also refer to Installing Options in Your IntelliStation M Pro.
System Management Controller
The system board contains a system management chip that monitors the computer at all times looking for
potential hardware failures. This chip is programmed with predetermined threshold values for the
following:
Ÿ System temperature
Ÿ Fan speed
Ÿ Power supply voltages (+5, +12, −12, +3.3, Vcore)
Ÿ Microprocessor voltages
Ÿ Intrusion detect for security (detects when chassis lid has been removed, even if power is off)
During system operation, Desktop Management Interface (DMI) code polls the chip and generates an alert
if the measured value is outside of the programmed minimum and maximum range. The alert can be
provided to a network administrator across a LAN.
Note: DMI is software used to gather information about the hardware and software in a computer. It
allows network administrators to remotely monitor and control the computer. DMI can be used to
remotely track many types of information about networked PCs. This information can be accessed
using a DMI browser. DMI browsers are provided by all major operating system and all major LAN
management packages.
The following table shows the typical system resource assignments for the system management controller.
Table 9. System Resource Assignments for the System Management Controller
Resource
Resource Assignment
ROM
None
RAM
None
I/O Address (Hex)
None
IRQ
None
DMA
None
When the computer is started, the resource assignments are subject to change during POST.
Chapter 2. System Board Features
19
Chapter 2. System Board Features
System Board Switches
Switches are provided on the system board to allow for custom configuration. The switches, which are
contained in an eight-position switch block on the system board, are rocker switches. The side of the
rocker that is pushed down is the active side.
Switches 1 through 4 determine the speed of the microprocessor (CPU) and local processor bus. Switch
settings for the Intel microprocessors supported by IntelliStation M Pro computers are shown in the
following table. Note that the two speeds shown for each microprocessor are the microprocessor core
speed followed by the local processor bus speed (for example, 350/100 MHz).
Table 10. Microprocessor Speed (Switches 1-4)
Speed
Switch 1
Switch 2
Switch 3
Switch 4
350/100 MHz
Off
Off
On
On
400/100 MHz
On
On
Off
On
450/100 MHz
Off
On
Off
On
Note: Only the switch values shown in the preceding table are supported. Using unsupported switch
settings will cause unpredictable results.
Switch 5 enables or disables ROM recovery mode.
Table 11. ROM Recovery (Switch 5)
Normal ROM operation
Off (factory default)
ROM recovery mode
On
Switch 6 enables or disables the system board Ethernet. When the Ethernet disable switch is On, the
system board Ethernet is disabled.
Table 12. System Board Ethernet Control (Switch 6)
Enable
Off (factory default)
Disable
On
Switch 7 enables or disables the privileged access password (PAP). Note that this password is also
referred to as the administrator password. Refer to the IntelliStation M Pro User Guide and Installing
Options in Your IntelliStation M Pro for important information on erasing lost or forgotten passwords.
Table 13. Privileged Access Password Control (Switch 7)
Disable
Off (factory default)
Enable
On
20
Technical Information Manual
Chapter 2. System Board Features
Switch 8 controls writing to the diskette drive.
Table 14. Diskette Drive Write Access (Switch 8)
Write enabled (normal operation)
Off (factory default)
Write protected (read only)
On
System Board Jumper
A jumper (J7E1) is provided on the system board for clearing CMOS memory. Refer to Installing Options
in Your IntelliStation M Pro and the IntelliStation M Pro User Guide for important information on clearing
CMOS.
Table 15. CMOS Operation
Function
Jumper Position
Normal operation
1-2 (factory default)
Erase password and configuration (clear CMOS)
2-3
Chapter 2. System Board Features
21
Chapter 2. System Board Features
Physical Layout of System Board
The system board contains all the cable connectors for the system. The following illustration shows the
physical layout of the system board. Also, a diagram of the board, including switch and jumper settings, is
attached inside the computer.
.1/
.2/
.3/
.4/
.5/
.6/
.7/
.8/
.9/
.1ð/
.11/
.12/
.13/
.14/
.15/
.16/
.17/
.18/
.19/
.2ð/
.21/
.22/
.23/
.24/
.25/
.26/
.27/
.28/
.29/
.3ð/
.31/
.32/
.33/
.34/
.35/
.36/
.37/
.38/
22
Secondary microprocessor socket
Primary microprocessor socket
Power connector
Secondary microprocessor fan sink
connector
Power connector
Primary microprocessor fan sink
connector
DIMM connectors (DIMM 0, 1, 2, 3)
SCSI Channel B, 16-bit (68-pin)
connector
Power switch and LED connector
Hard disk LED connector
Diskette drive connector
Primary IDE connector
RF ID antenna connector
SCSI Channel B, 8-bit (50-pin)
connector
Secondary IDE connector
Battery
Internal speaker connector
Clear CMOS jumper
Fan connector, front panel
Fan connector, front panel
Tamper detect switch connector
Switches
Wake on LAN connector
Wake on modem connector
SCSI Channel A, 16-bit (68-pin)
connector
RAIDport extension
Shared ISA/PCI connectors
PCI slot connectors
AGP slot connector
CD audio connector
Microphone connector
Audio line in/out connector
RJ-45 Ethernet connector
JTAG
Rear panel fan connector
Parallel/serial 1 and serial 2 connectors
USB1 and USB2 connectors
Keyboard and mouse connectors
Technical Information Manual
Figure 1. System Board
Chapter 2. System Board Features
Adapters plug into the PCI, ISA, or AGP expansion connectors (slots) on the system board. There are six
expansion slots: four dedicated PCI, one shared ISA/PCI, and one dedicated AGP. Signals from
adapters are routed to the PCI, ISA, or AGP buses. Each PCI-expansion connector provides a 32-bit-wide
data path. The ISA-expansion connector provides a 16-bit-wide data path, and the AGP connector
provides a 32-bit wide data path. The shared ISA/PCI slot will accommodate either an ISA adapter
installed in the ISA connector, or a PCI adapter installed into the PCI connector. The shared slot cannot
accommodate ISA and PCI adapters at the same time.
Each PCI-expansion connector is capable of driving one, low-power Schottky load. The ISA-expansion
connector is capable of driving two, low-power Schottky loads. The ISA bus is permanently set to the PCI
bus speed divided by four.
The PCI bus shares interrupts with the ISA bus. Free interrupts are automatically assigned to PCI devices
during POST. If no interrupts are available for the PCI devices, an 18xx POST error message is
generated.
For information on connector pin assignments, see “PCI Bus Connectors” on page 38, “ISA Bus
Connector” on page 36, and “AGP Bus Connector” on page 40.
Chapter 2. System Board Features
23
Chapter 2. System Board Features
Input/Output Connectors
The following diagram shows the connector panel and expansion slots located on the back side of the
computer.
Keyboard
Mouse
USB 1
USB 2
2
1
Serial 1
Parallel
1
Serial 2
2
RJ45
(Ethernet)
Audio
Line Out
Audio
Line In
SCSI
Device
Microphone
Monitor
Slot 1 (AGP)
Slot 2 (PCI)
Slot 3 (PCI)
Slot 4 (PCI)
Slot 5 (PCI)
Slot 6 (Shared ISA/PCI)
Figure 2. Rear Connector Panel and Expansion Slots
Note: Depending on your computer model, the monitor connector might be in a different slot than shown.
24
Technical Information Manual
Chapter 3. Adapters and Internal Drives
Chapter 3. Adapters and Internal Drives
This chapter provides information on adapters and internal drives supported by IntelliStation M Pro
computers.
Adapters
This section provides important information on adapter installation.
Note: IntelliStation M Pro computers do not support IDE expansion adapters or the IBM PCMCIA
adapter for PCI.
Wake on LAN Adapters
Wake on LAN adapters have two headers: a 3-pin, right-angle header for providing AUX5 (Auxiliary 5
volts), and a 2-pin straight header for connecting the wakeup signal to the system board. IntelliStation M
Pro computers have a 3-pin header that provides the AUX5 and wakeup signal connections. The Wake
on LAN adapter option will provide a Y-cable that has the 3-pin connector on one end and splits into the
3-pin and 2-pin connectors required to interface the card. When a Wake on LAN adapter is installed in
the system and attached to the AUX5 power, the system board Ethernet function must be disabled via
switch 6 on the system board (refer to “System Board Switches” on page 20 for switch information).
Internal Drives
The diskette, IDE, and SCSI interfaces provide connectors for attaching internal drives.
IntelliStation M Pro computers come standard with an internal diskette drive, an internal EIDE or SCSI
hard disk drive, and an internal CD-ROM drive.
The following tables show the characteristics of internal drives that come standard with or are available for
IntelliStation M Pro computers.
Table 16. Diskette Drives
Characteristics
Number/Size
Standard
One 3.5-inch, 1.44 MB diskette drive
Maximum
Two diskette drives and one tape backup
Table 17. IDE and SCSI Devices
Characteristics
Number/Size or Speed
Standard
One EIDE or one Ultra Wide SCSI hard disk drive (size varies by model)
Standard
One IDE CD/ROM drive
Optional
IDE or SCSI hard disk drives and tape backup drives
Maximum IDE Devices
Four total
Maximum SCSI Devices
Refer to the SCSI documentation on the Ready-to-Configure Utility Program CD that
comes with IntelliStation M Pro (Type 6889) computers
Note: The actual number of internal devices that can be installed in IntelliStation M Pro computers is
limited by the number of available drive bays.
 Copyright IBM Corp. 1998
25
Chapter 4. Power Supply
Chapter 4. Power Supply
Power requirements are supplied by a 330-watt power supply in the IntelliStation M Pro. The power
supply provides 3.3-volt power for the Pentium II microprocessor and core chip sets, as well as 5-volt
power for ISA and PCI adapters. Also included is an auxiliary 5-volt (AUX 5) supply to provide power to
power management circuitry and the system board Ethernet function, or a Wake on LAN adapter.
The power supply converts ac input voltages into dc output voltages. The power supply operates at either
115 V ac or 230 V ac. The power supply automatically senses the ac input voltage so that no switch
selection is required when installing the computer.
The power supply provides power for the following components:
Ÿ
Ÿ
Ÿ
Ÿ
Ÿ
System board
ISA and PCI adapters
Internal drives
Keyboard and auxiliary devices
USB devices
A logic signal on the power connector controls the power supply. (The front panel switch is not directly
connected to the power supply.)
The power supply connects to the system board with a 2 x 10 connector and a 1 x 6 connector.
26
 Copyright IBM Corp. 1998
Chapter 4. Power Supply
Power Input
For power input specifications, refer to Table 31 on page 31.
Power Output
The following tables show the power supply capacity per voltage for the IntelliStation M Pro. In the
tables, amperes are designated with an A, and milliamperes with an mA.
Table 18. Power Output for 330-Watt Power Supply
Output Voltage
Minimum to Maximum
Regulation Limits
+5 V dc
1.5 to 32.0 A4
+5% to −4%
+12 V dc
0.2 to 8.5 A
+5% to −5%
−12 V dc
0.0 to 0.7 A
+10% to −9%
−5 V dc
0.0 to 0.4 A
+10% to −10%
+3.3 V dc
0.0 to 25.0
+5 V dc (auxiliary)
5 mA to 0.75 A
A4
±5%
±5%
The power supply provides separate voltage sources for the system board and internal storage devices.
The following tables show the maximum power that specific system components can draw. In normal
operation, components draw less current than the maximum shown.
Table 19. System Board Power Connectors
Supply Voltage
Maximum Current
Regulation Limits
+3.3 V dc
8520 mA
+5.0% to −5.0%
+5.0 V dc
2000 mA
+5.0% to −4.0%
+12.0 V dc
25.0 mA
+5.0% to −5.0%
−12.0 V dc
25.0 mA
+10.0% to −9.0%
Supply Voltage
Maximum Current
Regulation Limits
+5.0 V dc
2000 mA
+5.0% to −4.0%
−5.0 V dc
100 mA
±10.0%
+12.0 V dc
175 mA
+5.0% to −5.0%
−12.0 V dc
100 mA
+10.0% to −9.0%
Table 20. ISA-Bus Adapters
4
Simultaneous loading of +3.3 V dc and +5 V dc must not exceed 217 watts.
Chapter 4. Power Supply
27
Chapter 4. Power Supply
Table 21. PCI-Bus Adapters (Per Slot)
Supply Voltage
Maximum Current
Regulation Limits
+5.0 V dc
5000 mA
+5.0% to −4.0%
+3.3 V dc
7600 mA
+5.0% to −5.0%
+12 V dc
500 mA
±5.0%
−5.0 V dc
100 mA
±10.0%
Notes:
1. For each PCI connector, the maximum power consumption is rated at 25 watts for +5 V and +3.3 V
combined.
2. Maximum current cannot be supplied to all components at all times. System power and cooling are
designed to support the statistical RMS power load and typical combinations of adapters.
Table 22. AGP Adapter
Supply Voltage
Maximum Current
Regulation Limits
+3.3 V dc
7600 mA
±10.0%
Table 23. Internal SCSI Drives
Hard Drive
Supply Voltage
Maximum Current
Regulation Limits
4.5 GB
+5.0 V dc
500 mA (seek peak); 400
mA (seek avg.); 270 mA
(startup max.)
+5.0% to −5.0%
4.5 GB
+12.0 V dc
1550 mA (seek peak); 850
mA (seek avg.); 2000 mA
(startup max.)
+5.0% to −5.0%
9.1 GB
+5.0 V dc
520 mA (seek peak); 400
mA (seek avg.); 270 mA
(startup max.)
+5.0% to −5.0%
9.1 GB
+12.0 V dc
1680 mA (seek peak); 950
mA (seek avg.); 2000 mA
(startup max.)
+5.0% to −5.0%
Note: Some adapters and hard disk drives draw more current than the recommended limits. These
adapters and drives can be installed in the system; however, the power supply will shut down if the
total power used exceeds the maximum power that is available.
Table 24. Keyboard Port
Supply Voltage
Maximum Current
Regulation Limits
+5.0 V dc
500 mA
+5.0% to −4.0%
Supply Voltage
Maximum Current
Regulation Limits
+5.0 V dc
500 mA
+5.0% to −4.0%
Table 25. USB Port
28
Technical Information Manual
Chapter 4. Power Supply
Output Protection
The power supply protects against output overcurrent, overvoltage, and short circuits.
A short circuit that is placed on any dc output (between outputs or between an output and dc return)
latches all dc outputs into a shutdown state, with no damage to the power supply. If this shutdown state
occurs, the power supply returns to normal operation only after the fault has been removed and the ac
input voltage has been turned off for at least five seconds.
If an overvoltage fault occurs (in the power supply), the power supply latches all dc outputs into a
shutdown state before any output exceeds 130% of the nominal value of the power supply.
Power Connectors
The power supply connects to the system board via a 2 x 10 connector and a 1 x 6 connector.
The power supply provides 4-pin connectors for attaching internal devices. The IntelliStation M Pro has
two diskette and five DASD connectors. The following tables list the pin assignments for these
connectors.
Note: The total power used by any of the following connectors must not exceed the amount shown in
Table 23 on page 28.
Table 26. Pin Assignments for the 4-Pin Power Connectors
Connector
Location
Pin 1
Pin 2
Pin 3
Pin 4
P3
3.5-inch diskette drive
+5 V
Ground
Ground
+12 V
P5, P6,
P8, P9
DASD
+12 V
Ground
Ground
+5 V
Chapter 4. Power Supply
29
Chapter 5. Physical Specifications
Chapter 5. Physical Specifications
The tables in this chapter list the physical specifications for IntelliStation M Pro computers.
Note: The computers are electromagnetically compatible with FCC Class A.
Table 27. Size
Description
Measurement
Depth
445 mm (17.5 in.)
Height
492 mm (19.4 in.)
Width
200 mm (7.9 in.)
Table 28. Weight
Description
Maximum configuration (as
Measurement
shipped)5
17.3 kg (38 lb)
In the following table, the maximum altitude at which the specified air temperatures apply is 2134 m
(7000 ft). At higher altitudes, the maximum air temperatures are lower than those specified.
Table 29. Air Temperature
Description
Measurement
System on
10 to 32°C (50 to 95°F)
System off
−40 to 70°C (−40 to 158°F)
Table 30. Humidity
5
Description
Measurement
System on
8% to 80%
System off
8% to 80%
Maximum configuration weight depends on options installed. The weight given here is for a computer fully populated with options.
30
 Copyright IBM Corp. 1998
Chapter 5. Physical Specifications
Power consumption and heat output vary depending on the number and type of optional features installed
and the power-management optional features in use. In the following two tables, maximum power and
heat specifications are based on the maximum capacity of the power supply.
Table 31. Electrical Input
Description
Measurement
Low range
90 V ac (minimum)
137 V ac (maximum)
High range
180 V ac (minimum)
265 V ac (maximum)
Sine-wave input
50 to 60 Hz is required
Input kilovolt-amperes, approximate maximum (as shipped)
0.75 kVA
Table 32. Heat Output (Approximate)
Description
Measurement
Maximum configuration (as shipped)
90 W (306 Btu per hour)
Theoretical maximum configuration6
470 W (1600 Btu per hour)
The levels in the following table were measured in controlled acoustical environments according to
procedures specified by the American National Standards Institute (ANSI) S12.10 and ISO 7779, and are
reported in accordance with ISO 9296. Actual sound pressure levels in your location might exceed the
average values stated because of room reflections and other nearby noise sources. The declared sound
power levels indicate an upper limit, below which a large number of computers will operate.
Table 33. Acoustical Noise Emission Values
Description
Measurement
Average sound pressure levels (operator position)
42 dB operating
37 dB idle
Average sound pressure levels (bystander position of 3.3 ft)
36 dB operating
34 dB idle
Declared (upper limit) sound power levels
5.2 bels operating
5.0 bels idle
The airflow rating for IntelliStation M Pro (Type 6889) computers is approximately 0.92 cubic
meters/minute (32.5 CFM).
6
Under typical maximum configurations, the heat output will be significantly below the theoretical maximum.
Chapter 5. Physical Specifications
31
Chapter 6. System Compatibility
Chapter 6. System Compatibility
This chapter provides information on some of the hardware, software, and BIOS compatibility issues for
the IntelliStation M Pro computers (Type 6898). For a list of compatible hardware and software option
packages available, refer to the Compatibility Report for these computers on the World Wide Web at
http://www.pc.ibm.com/us/intellistation/tech_library.html.
Hardware Compatibility
This section discusses hardware and BIOS compatibility issues that must be considered when designing
application programs.
Many of the interfaces are the same as those used by the IBM Personal Computer AT. In most cases,
the command and status organization of these interfaces is maintained.
The functional interfaces are compatible with the following interfaces:
Ÿ The Intel 8259 interrupt controllers (edge-triggered mode)
Ÿ The National Semiconductor NS16450 and NS16550A serial communication controllers
Ÿ The Motorola MC146818 Time of Day Clock command and status (CMOS reorganized)
Ÿ The Intel 8254 timer, driven from a 1.193 MHz clock (channels 0, 1, and 2)
Ÿ The Intel 8237 DMA controller, except for the Command and Request registers and the Rotate and
Mask functions; the Mode register is partially supported
Ÿ The Intel 8272 or 82077 diskette drive controllers
Ÿ The Intel 8042 keyboard controller at addresses 0060h and 0064h
Ÿ All video standards using VGA, EGA, CGA, MDA, and Hercules modes
Ÿ The parallel printer ports (Parallel 1, Parallel 2, and Parallel 3) in compatibility mode
Use the following information to develop application programs. Whenever possible, use the BIOS as an
interface to hardware to provide maximum compatibility and portability of applications among systems.
32
 Copyright IBM Corp. 1998
Chapter 6. System Compatibility
Hardware Interrupts
Hardware interrupts are level-sensitive for PCI interrupts and edge-sensitive for ISA interrupts. The
interrupt controller clears its in-service register bit when the interrupt routine sends an End of Interrupt
(EOI) command to the controller. The EOI command is sent regardless of whether the incoming interrupt
request to the controller is active or inactive.
The interrupt-in-progress latch is readable at an I/O-address bit position. This latch is read during the
interrupt service routine and might be reset by the read operation, or it might require an explicit reset.
Note: For performance and latency considerations, designers might want to limit the number of devices
sharing an interrupt level.
With level-sensitive interrupts, the interrupt controller requires that the interrupt request be inactive at the
time the EOI command is sent; otherwise, a new interrupt request will be detected. To avoid this, a
level-sensitive interrupt handler must clear the interrupt condition (usually by a read or write operation to
an I/O port on the device causing the interrupt). After processing the interrupt, the interrupt handler:
1. Clears the interrupt
2. Waits one I/O delay
3. Sends the EOI
4. Waits one I/O delay
5. Enables the interrupt through the Set Interrupt Enable Flag command
Hardware interrupt IRQ9 is defined as the replacement interrupt level for the cascade level IRQ2.
Program interrupt sharing is implemented on IRQ2, interrupt 0Ah. The following processing occurs to
maintain compatibility with the IRQ2 used by IBM Personal Computer products:
1. A device drives the interrupt request active on IRQ2 of the channel.
2. This interrupt request is mapped in hardware to IRQ9 input on the second interrupt controller.
3. When the interrupt occurs, the system microprocessor passes control to the IRQ9 (interrupt 71h)
interrupt handler.
4. This interrupt handler performs an EOI command to the second interrupt controller and passes control
to the IRQ2 (interrupt 0Ah) interrupt handler.
5. This IRQ2 interrupt handler, when handling the interrupt, causes the device to reset the interrupt
request before performing an EOI command to the master interrupt controller that finishes servicing
the IRQ2 request.
APIC Controller
IntelliStation M Pro computers provide an Advanced Programmable Interrupt Controller (APIC) to enable
multi-processing and to allow advanced interrupt handling in uni-processor configurations. The APIC
architecture consists of local APIC(s) inside of each microprocessor and a single IO APIC to distribute
interrupts to the microprocessors. Interrupts are handled as a default by legacy 8259 devices inside the
PIIX4 controller. The APIC resources, when utilized by the operating system, essentially replace the
legacy 8259 controllers and provide advanced capability.
Chapter 6. System Compatibility
33
Chapter 6. System Compatibility
The APIC resources are made available to the operating system via a software table. The following table
details the hardware connections on the system board that are relevant.
Table 34. IO APIC Resources
IO APIC Input
Bus Connection
Notes7
INT0
INTR
8259 Output
INT1
IRQ 1
Legacy Connection - Keyboard
INT2
IRQ 0
Legacy Connection - Timer
INT3
IRQ 3
Legacy Connection - COM 2
INT4
IRQ 4
Legacy Connection - COM 1
INT5
IRQ 5
Legacy Connection - LPT3
INT6
IRQ 6
Legacy Connection - Diskette
INT7
IRQ 7
Legacy Connection - LPT1/LPT2
INT8
IRQ 8
Legacy Connection - RTC
INT9
IRQ 9
Legacy Connection
INT10
IRQ 10
Legacy Connection
INT11
IRQ 11
Legacy Connection
INT12
IRQ 12
Legacy Connection - Mouse
INT13
IRQ 13
Legacy Connection - Math coprocessor
INT14
IRQ 14
Legacy Connection - IDE primary
INT15
IRQ 15
Legacy Connection - IDE secondary
INT16
PCI INT 1
IOAPIC mode only
INT17
PCI INT 2
IOAPIC mode only
INT18
PCI INT 3
IOAPIC mode only
INT19
PCI INT 4
IOAPIC mode only
INT20
SCSI - Internal
IOAPIC mode only
INT22
System Management
Controller
IOAPIC mode only
INT23
SMI
IOAPIC mode only
Diskette Drives and Controller
The following table shows the reading, writing, and formatting capabilities for the diskette drive type
supported by IntelliStation M Pro computers.
Table 35. 3.5-Inch Diskette Drive Reading, Writing, and Formatting Capabilities
7
Diskette Drive Type
720 KB Mode
1.44 MB Mode
2.88 MB Mode
1.44 MB drive
RWF
RWF
Not supported
Connections noted here are typical only, and may be modified by software control.
34
Technical Information Manual
Chapter 6. System Compatibility
Copy Protection
The following methods of copy protection might not work in systems using the 3.5-inch, 1.44 MB diskette
drive.
Ÿ Bypassing BIOS routines:
– Data transfer rate: BIOS selects the proper data transfer rate for the media being used.
– Diskette parameter table: Copy protection, which creates its own diskette parameter table, might
not work in these drives.
Ÿ Diskette drive controls:
– Rotational speed: The time between two events in a diskette drive is a function of the controller.
– Access time: Diskette BIOS routines must set the track-to-track access time for the different types
of media that are used in the drives.
– ‘Diskette change’ signal: Copy protection might not be able to reset this signal.
Ÿ Write-current control: Copy protection that uses write-current control does not work, because the
controller selects the proper write current for the media that is being used.
Hard Disk Drives and Controller
Reading from and writing to the hard disk is initiated in the same way as in other IBM Personal Computer
products; however, new functions are supported.
Software Compatibility
To maintain software compatibility, the interrupt polling mechanism that is used by IBM Personal Computer
products is retained. Software that interfaces with the reset port for the IBM Personal Computer
positive-edge interrupt sharing (hex address 02Fx or 06Fx, where x is the interrupt level) does not create
interference.
Software Interrupts
With the advent of software interrupt sharing, software interrupt routines must daisy-chain interrupts. Each
routine must check the function value, and if it is not in the range of function calls for that routine, it must
transfer control to the next routine in the chain. Because software interrupts are initially pointed to
address 0:0 before daisy chaining, check for this case. If the next routine is pointed to address 0:0 and
the function call is out of range, the appropriate action is to set the carry flag and do a RET 2 to indicate
an error condition.
Machine-Sensitive Programs
Programs can select machine-specific features, but they must first identify the machine and model type.
IBM has defined methods for uniquely determining the specific machine type. The machine model byte
can be found through Interrupt 15H, Return System Configuration Parameters function ((AH)=C0H).
Chapter 6. System Compatibility
35
Appendix A. Connector Pin Assignments
Appendix A. Connector Pin Assignments
The following tables show the pin assignments for various system board connectors.
ISA Bus Connector
A1
A31
C1
C18
B1
B31
D1
D18
Figure 3. ISA Bus Connector
The ISA bus connector is located on the system board.
Table 36 (Page 1 of 2). Pin Assignments for the ISA Bus Connectors
Pin
Signal Name
I/O
Pin
Signal Name
I/O
B1
Ground
NA
A1
IOCHCK#
I
B2
RESET DRV
O
A2
SD7
I/O
B3
+5 V dc
NA
A3
SD6
I/O
B4
IRQ2/9
I
A4
SD5
I/O
B5
−5 V dc
NA
A5
SD4
I/O
B6
DRQ2
I
A6
SD3
I/O
B7
−12 V dc
NA
A7
SD2
I/O
B8
0WS#
I
A8
SD1
I/O
B9
+12 V dc
NA
A9
SD0
I/O
B10
Ground
NA
A10
IOCHRDY
I
B11
SMEMW#
O
A11
AEN
O
B12
SMEMR#
O
A12
SA19
I/O
B13
IOW#
I/O
A13
SA18
I/O
B14
IOR#
I/O
A14
SA17
I/O
B15
DACK3#
O
A15
SA16
I/O
B16
DRQ3
I
A16
SA15
I/O
B17
DACK1#
O
A17
SA14
I/O
B18
DRQ1
I
A18
SA13
I/O
B19
REFRESH#
I/O
A19
SA12
I/O
B20
CLK
O
A20
SA11
I/O
B21
IRQ7
I
A21
SA10
I/O
B22
IRQ6
I
A22
SA9
I/O
B23
IRQ5
I
A23
SA8
I/O
B24
IRQ4
I
A24
SA7
I/O
B25
IRQ3
I
A25
SA6
I/O
B26
DACK2#
O
A26
SA5
I/O
B27
TC
O
A27
SA4
I/O
B28
BALE
O
A28
SA3
I/O
36
 Copyright IBM Corp. 1998
Appendix A. Connector Pin Assignments
Table 36 (Page 2 of 2). Pin Assignments for the ISA Bus Connectors
Pin
Signal Name
I/O
Pin
Signal Name
I/O
B29
+5 V dc
NA
A29
SA2
I/O
B30
OSC
O
A30
SA1
I/O
B31
Ground
NA
A31
SA0
I/O
D1
MEMCS16#
I
C1
SBHE#
I/O
D2
IOCS16#
I
C2
LA23
I/O
D3
IRQ10
I
C3
LA22
I/O
D4
IRQ11
I
C4
LA21
I/O
D5
IRQ12
I
C5
LA20
I/O
D6
IRQ15
I
C6
LA19
I/O
D7
IRQ14
I
C7
LA18
I/O
D8
DACK0#
O
C8
LA17
I/O
D9
DRQ0
I
C9
MEMR#
I/O
D10
DACK5#
O
C10
MEMW#
I/O
D11
DRQ5
I
C11
SD8
I/O
D12
DACK6#
O
C12
SD9
I/O
D13
DRQ6
I
C13
SD10
I/O
D14
DACK7#
O
C14
SD11
I/O
D15
DRQ7
I
C15
SD12
I/O
D16
+5 V dc
NA
C16
SD13
I/O
D17
MASTER#
I
C17
SD14
I/O
D18
Ground
NA
C18
SD15
I/O
Appendix A. Connector Pin Assignments
37
Appendix A. Connector Pin Assignments
PCI Bus Connectors
A1
A49
A52
A62
B1
B49
B52
B62
Figure 4. PCI Bus Connector
Note: The PCI bus connectors are located on the system board.
Table 37 (Page 1 of 2). Pin Assignments for the PCI Bus Connectors
Pin
Signal Name
I/O
Pin
Signal Name
I/O
A1
TRST#
O
B1
−12 V dc
NA
A2
+12 V dc
NA
B2
TCK
O
A3
TMS
O
B3
Ground
NA
A4
TDI
O
B4
TDO
I
A5
+5 V dc
NA
B5
+5 V dc
NA
A6
INTA#
I
B6
+5 V dc
NA
A7
INTC#
I
B7
INTB#
I
A8
+5 V dc
NA
B8
INTD#
I
A9
Reserved
NA
B9
PRSNT1#
I
A10
+5 V dc
NA
B10
Reserved
NA
A11
Reserved
NA
B11
PRSNT2#
I
A12
Ground
NA
B12
Ground
NA
A13
Ground
NA
B13
Ground
NA
A14
Reserved
NA
B14
Reserved
NA
A15
RST#
O
B15
Ground
NA
A16
+5 V dc
NA
B16
CLK
O
A17
GNT#
O
B17
Ground
NA
A18
Ground
NA
B18
REQ#
I
A19
Reserved
NA
B19
+5 V dc
NA
A20
Address/Data 30
I/O
B20
Address/Data 31
I/O
A21
+3.3 V dc
NA
B21
Address/Data 29
I/O
A22
Address/Data 28
I/O
B22
Ground
NA
A23
Address/Data 26
I/O
B23
Address/Data 27
I/O
A24
Ground
NA
B24
Address/Data 25
I/O
A25
Address/Data 24
I/O
B25
+3.3 V dc
NA
A26
IDSEL
O
B26
C/BE3#
I/O
A27
+3.3 V dc
NA
B27
Address/Data 23
I/O
A28
Address/Data 22
I/O
B28
Ground
NA
A29
Address/Data 20
I/O
B29
Address/Data 21
I/O
A30
Ground
NA
B30
Address/Data 19
I/O
A31
Address/Data 18
I/O
B31
+3.3 V dc
NA
A32
Address/Data 16
I/O
B32
Address/Data 17
I/O
A33
+3.3 V dc
NA
B33
C/BE2#
I/O
A34
FRAME#
I/O
B34
Ground
NA
38
Technical Information Manual
Appendix A. Connector Pin Assignments
Table 37 (Page 2 of 2). Pin Assignments for the PCI Bus Connectors
Pin
Signal Name
I/O
Pin
Signal Name
I/O
A35
Ground
NA
B35
IRDY#
I/O
A36
TRDY#
I/O
B36
+3.3 V dc
NA
A37
Ground
NA
B37
DEVSEL#
I/O
A38
STOP#
I/O
B38
Ground
NA
A39
+3.3 V dc
NA
B39
LOCK#
I/O
A40
SDONE
I/O
B40
PERR#
I/O
A41
SBO#
I/O
B41
+3.3 V dc
NA
A42
Ground
NA
B42
SERR#
I/O
A43
PCIPAR
NA
B43
+3.3 V dc
NA
A44
Address/Data 15
I/O
B44
C/BE1#
I/O
A45
+3.3 V
I/O
B45
Address/Data 14
I/O
A46
Address/Data 13
NA
B46
Ground
NA
A47
Address/Data 11
I/O
B47
Address/Data 12
I/O
A48
Ground
I/O
B48
Address/Data 10
I/O
A49
Address/Data 9
NA
B49
Ground
NA
A50
##Key##
NA
B50
##Key##
NA
A51
##Key##
NA
B51
##Key##
NA
A52
C/BE0#
I/O
B52
Address/Data 8
I/O
A53
+3.3 V dc
I/O
B53
Address/Data 7
I/O
A54
Address/Data 6
NA
B54
+3.3 V dc
NA
A55
Address/Data 4
I/O
B55
Address/Data 5
I/O
A56
Ground
I/O
B56
Address/Data 3
I/O
A57
Address/Data 2
NA
B57
Ground
NA
A58
Address/Data 0
I/O
B58
Address/Data 1
I/O
A59
+5 V dc
NA
B59
+5 V dc
NA
A60
REQ64#
I/O
B60
ACK64#
I/O
A61
+5 V dc
NA
B61
+5 V dc
NA
A62
+5 V dc
NA
B62
+5 V dc
NA
Appendix A. Connector Pin Assignments
39
Appendix A. Connector Pin Assignments
AGP Bus Connector
A1
A21
A26
A66
B1
B21
B26
B66
Figure 5. AGP Bus Connector
Note: The AGP bus connector is located on the system board.
Table 38 (Page 1 of 2). Pin Assignments for the AGP
Bus Connector
Pin
Signal Name
Pin
Signal Name
A1
+12 V dc
B1
spare
A2
spare
B2
+5 V dc
A3
Reserved *
B3
+5 V dc
A4
USB-
B4
USB+
A5
Ground
B5
Ground
A6
INTA#
B6
INTB#
A7
RST#
B7
CLK
A8
GNT#
B8
REQ#
A9
VCC 3.3
B9
VCC 3.3
A10
ST1
B10
ST0
A11
Reserved
B11
ST2
A12
PIPE#
B12
RBF#
A13
Ground
B13
Ground
A14
Spare
B14
Spare
A15
SBA1
B15
SBA0
A16
VCC 3.3
B16
VCC 3.3
A17
SBA3
B17
SBA2
A18
Reserved
B18
SB_STB
A19
Ground
B19
Ground
A20
SBA5
B20
SBA4
A21
SBA7
B21
SBA6
A22
Key
B22
Key
A23
Key
B23
Key
A24
Key
B24
Key
A25
Key
B25
Key
A26
AD30
B26
AD31
A27
AD28
B27
AD29
A28
VCC 3.3
B28
VCC 3.3
A29
AD26
B29
AD27
A30
AD24
B30
AD25
A31
Ground
B31
Ground
A32
Reserved
B32
AD STB1
A33
C/BE3#
B33
AD23
40
Technical Information Manual
Appendix A. Connector Pin Assignments
Table 38 (Page 2 of 2). Pin Assignments for the AGP
Bus Connector
Pin
Signal Name
Pin
Signal Name
A34
Vddq 3.3
B34
Vddq 3.3
A35
AD22
B35
AD21
A36
AD20
B36
AD19
A37
Ground
B37
Ground
A38
AD18
B38
AD17
A39
AD16
B39
C/BE2#
A40
Vddq 3.3
B40
Vddq 3.3
A41
FRAME#
B41
IRDY#
A42
Spare
B42
Spare
A43
Ground
B43
Ground
A44
Spare
B44
Spare
A45
VCC 3.3
B45
VCC 3.3
A46
TRDY#
B46
DEVSEL#
A47
STOP#
B47
Vddq 3.3
A48
Spare
B48
PERR#
A49
Ground
B49
Ground
A50
PAR
B50
SERR#
A51
AD15
B51
C/BE1#
A52
Vddq 3.3
B52
Vddq 3.3
A53
AD13
B53
AD14
A54
AD11
B54
AD12
A55
Ground
B55
Ground
A56
AD9
B56
AD10
A57
C/BE0#
B57
AD8
A58
Vddq 3.3
B58
Vddq 3.3
A59
Reserved
B59
AD STB0
A60
AD6
B60
AD7
A61
Ground
B61
Ground
A62
AD4
B62
AD5
A63
AD2
B63
AD3
A64
Vddq 3.3
B64
Vddq 3.3
A65
AD0
B65
AD1
A66
SMB1
B66
SMB0
* This reserved pin should be connected to Ground.
Appendix A. Connector Pin Assignments
41
Appendix A. Connector Pin Assignments
IDE Connectors
2
40
1
39
Figure 6. IDE Connector
The IDE connectors are 40-pin, shrouded berg strips located on the system board.
Table 39. Pin Assignments for the IDE Connectors
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
Reset
O
2
Ground
NA
3
D7
I/O
4
D8
I/O
5
D6
I/O
6
D9
I/O
7
D5
I/O
8
D10
I/O
9
D4
I/O
10
D11
I/O
11
D3
I/O
12
D12
I/O
13
D2
I/O
14
D13
I/O
15
D1
I/O
16
D14
I/O
17
D0
I/O
18
D15
I/O
19
Ground
NA
20
Key
NA
21
DMA REQ
NA
22
Ground
NA
23
IOW#
O
24
Ground
NA
25
IOR#
O
26
Ground
NA
27
IOCHRDY
I
28
CSEL
O
29
DMA ACK#
NA
30
Ground
NA
31
IRQ
I
32
CS16#
I
33
SA1
O
34
No connect
I
35
SA0
O
36
SA2
O
37
CS0#
O
38
CS1#
O
39
Active#
I
40
Ground
NA
42
Technical Information Manual
Appendix A. Connector Pin Assignments
Diskette Drive Connector
2
34
1
33
Figure 7. Diskette Drive Connector
The diskette drive connector is a 34-pin, shrouded berg strip located on the system board.
Table 40. Pin Assignments for the Diskette Drive Connector
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
Drive 2 installed#
I
2
High density select
O
3
Not connected
NA
4
Not connected
NA
5
Ground
NA
6
Data rate 0
NA
7
Ground
NA
8
Index#
I
9
Reserved
NA
10
Motor enable 0#
O
11
Ground
NA
12
Drive select 1#
O
13
Ground
NA
14
Drive select 0#
O
15
Ground
NA
16
Motor enable 1#
O
17
MSEN1
I
18
Direction in#
O
19
Ground
NA
20
Step#
O
21
Ground
NA
22
Write data#
O
23
Ground
NA
24
Write enable#
O
25
Ground
NA
26
Track 0#
I
27
MSEN0
I
28
Write protect#
I
29
Ground
NA
30
Read data#
I
31
Ground
NA
32
Head 1 select#
O
33
Ground
NA
34
Diskette change#
I
Appendix A. Connector Pin Assignments
43
Appendix A. Connector Pin Assignments
SCSI 50-pin Connector
2
50
1
49
Figure 8. SCSI 50-pin Connector
This connector is a 50-pin, shrouded berg strip located on the system board.
Table 41. Pin Assignments for the SCSI 50-pin Connector
8
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
Ground
NA
2
DB0#
I/O
3
Ground
NA
4
DB1#
I/O
5
Ground
NA
6
DB2#
I/O
7
Ground
NA
8
DB3#
I/O
9
Ground
NA
10
DB4#
I/O
11
Ground
NA
12
DB5#
I/O
13
Ground
NA
14
DB6#
I/O
15
Ground
NA
16
DB7#
I/O
17
Ground
NA
18
DBP#
I/O
19
Ground
NA
20
Ground
NA
21
Ground
NA
22
Ground
I8
23
Ground
NA
24
Ground
NA
25
Not connected
NA
26
TERM PWR
NA
27
Ground
NA
28
Ground
NA
29
Ground
NA
30
Ground
NA
31
Ground
NA
32
ATN#
I/O
33
Ground
NA
34
Ground
NA
35
Ground
NA
36
BSY#
I/O
37
Ground
NA
38
ACK#
I/O
39
Ground
NA
40
RST#
I/O
41
Ground
NA
42
MSG#
I/O
43
Ground
NA
44
SEL#
I/O
45
Ground
NA
46
C/D#
I/O
47
Ground
NA
48
REQ#
I/O
49
Ground
NA
50
I/O#
I/O
This pin is used to detect an attached cable.
44
Technical Information Manual
Appendix A. Connector Pin Assignments
SCSI 68-pin Connectors
2
68
1
67
Figure 9. SCSI 68-pin Connector
These two connectors are 68-pin, shrouded berg strips located on the system board.
Table 42. Pin Assignments for the SCSI 68-pin Connector
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
Ground
NA
2
Ground
NA
3
Ground
NA
4
Ground
NA
5
Ground
NA
6
Ground
NA
7
Ground
NA
8
Ground
NA
9
Ground
NA
10
Ground
NA
11
Ground
NA
12
Ground
NA
13
Not connected
NA
14
Ground
NA
15
Ground
NA
16
Ground
NA
17
TERM PWR
NA
18
TERM PWR
NA
19
Reserved
NA
20
Ground
NA
21
Ground
NA
22
Ground
I
23
Ground
NA
24
Ground
NA
27
Ground
NA
28
Ground
NA
29
Ground
NA
30
Ground
NA
31
Ground
NA
32
Ground
NA
33
Ground
NA
34
Ground
NA
35
DB12#
I/O
36
DB13#
I/O
37
DB14#
I/O
38
DB15#
I/O
39
DBP1#
I/O
40
DB0#
I/O
41
DB1#
I/O
42
DB2#
I/O
43
DB3#
I/O
44
DB4#
I/O
45
DB5#
I/O
46
DB6#
I/O
47
DB7#
I/O
48
DBP#
I/O
49
Ground
NA
50
Ground
I8
51
TERM PWR
NA
52
TERM PWR
NA
53
Reserved
NA
54
Ground
NA
55
ATN#
I/O
56
Ground
NA
57
BSY#
I/O
58
ACK#
I/O
59
RST#
I/O
60
MSG#
I/O
61
SEL#
I/O
62
C/D#
I/O
63
REQ#
I/O
64
I/O#
I/O
65
DB8#
I/O
66
DB9#
I/O
67
DB10#
I/O
68
DB11#
I/O
Appendix A. Connector Pin Assignments
45
Appendix A. Connector Pin Assignments
System Memory Connectors
85
168
1
84
Figure 10. System Memory (DIMM) Connector
Each DIMM connector is a 168-pin, gold-lead, unbuffered, 3.3 V, SDRAM connector. These connectors
are located on the system board.
Table 43 (Page 1 of 3). Pin Assignments for the DIMM Connectors
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
Ground
NA
85
Ground
NA
2
DQ0
I/O
86
DQ32
I/O
3
DQ1
I/O
87
DQ33
I/O
4
DQ2
I/O
88
DQ34
I/O
5
DQ3
I/O
89
DQ35
I/O
6
Vcc
I/O
90
Vcc
NA
7
DQ4
I/O
91
DQ36
NA
8
DQ5
I/O
92
DQ37
I/O
9
DQ6
I/O
93
DQ38
I/O
10
DQ7
I/O
94
DQ39
I/O
11
DQ8
I/O
95
DQ40
I/O
12
Ground
NA
96
Ground
NA
13
DQ9
I/O
97
DQ41
I/O
14
DQ10
I/O
98
DQ42
I/O
15
DQ11
O
99
DQ43
I/O
16
DQ12
O
100
DQ44
I/O
17
DQ13
O
101
DQ45
I/O
18
Vcc
O
102
Vcc
NA
19
DQ14
O
103
DQ46
I/O
20
DQ15
I/O
104
DQ47
I/O
21
CB0
I/O
105
CB4
I/O
22
CB1
I/O
106
CB5
I/O
23
Ground
I/O
107
Ground
NA
24
Not connected
NA
108
Not connected
NA
25
Not connected
NA
109
Not connected
NA
26
Vcc
I/O
110
Vcc
NA
27
/WE0
O
111
Not connected
NA
28
DQMB0
O
112
DQMB4
O
29
DQMB1
O
113
DQMB5
O
30
/S0
O
114
/S1
O
31
/OE0
O
115
Not connected
NA
32
Ground
O
116
Ground
NA
46
Technical Information Manual
Appendix A. Connector Pin Assignments
Table 43 (Page 2 of 3). Pin Assignments for the DIMM Connectors
Pin
Signal Name
I/O
Pin
Signal Name
I/O
33
A0
O
117
A1
O
34
A2
O
118
A3
O
35
A4
O
119
A5
O
36
A6
O
120
A7
O
37
A8
O
121
A9
O
38
A10
O
122
A11
O
39
Not connected
O
123
Not connected
O
40
Vcc
NA
124
Vcc
NA
41
Vcc
NA
125
Not connected
NA
42
Not connected
NA
126
Not connected
NA
43
Ground
NA
127
Ground
NA
44
/OE2
O
128
Not connected
NA
45
/S2
O
129
/S3
O
46
DQMB2
O
130
DQMB6
O
47
DQMB3
O
131
DQMB7
O
48
/WE2
O
132
Not connected
NA
49
Vcc
O
133
Vcc
NA
50
Not connected
NA
134
Not connected
NA
51
Not connected
NA
135
Not connected
NA
52
CB2
I/O
136
CB6
I/O
53
CB3
I/O
137
CB7
I/O
54
Ground
NA
138
Ground
NA
55
DQ16
I/O
139
DQ48
I/O
56
DQ17
I/O
140
DQ49
I/O
57
DQ18
I/O
141
DQ50
I/O
58
DQ19
I/O
142
DQ51
I/O
59
Vcc
NA
143
Vcc
NA
60
DQ20
I/O
144
DQ52
I/O
61
Not connected
NA
145
Not connected
NA
62
Not connected
NA
146
Not connected
NA
63
Not connected
NA
147
Pull Up
O
64
Ground
NA
148
Ground
NA
65
DQ21
I/O
149
DQ53
I/O
66
DQ22
I/O
150
DQ54
I/O
67
DQ23
I/O
151
DQ55
I/O
68
Ground
NA
152
Ground
NA
69
DQ24
I/O
153
DQ56
I/O
70
DQ25
I/O
154
DQ57
I/O
71
DQ26
I/O
155
DQ58
I/O
72
DQ27
I/O
156
DQ59
I/O
73
Vcc
NA
157
Vcc
NA
74
DQ28
I/O
158
DQ60
I/O
75
DQ29
I/O
159
DQ61
I/O
Appendix A. Connector Pin Assignments
47
Appendix A. Connector Pin Assignments
Table 43 (Page 3 of 3). Pin Assignments for the DIMM Connectors
Pin
Signal Name
I/O
Pin
Signal Name
I/O
76
DQ30
I/O
160
DQ62
I/O
77
DQ31
I/O
161
DQ63
I/O
78
Ground
NA
162
Ground
NA
79
Not connected
I/O
163
Not connected
NA
80
Not connected
I/O
164
Not connected
NA
81
Not connected
I/O
165
SA0
I/O
82
SDA
I/O
166
SA1
I/O
83
SCL
I/O
167
SA2
I/O
84
Vcc
NA
168
Vcc
I/O
48
Technical Information Manual
Appendix A. Connector Pin Assignments
USB Connectors
1
2
3
4
Figure 11. USB Connector
The external interface for the USB ports consists of two, 4-pin connectors.
Table 44. Pin Assignments for the USB Connectors
Pin
Signal Name
I/O
1
VCC
NA
2
-Data
I/O
3
+Data
I/O
4
Ground
NA
Parallel Port Connector
1
13
25
14
Figure 12. Parallel Port Connector
The external interface for the parallel port is a 25-pin, female, D-shell connector.
Table 45. Pin Assignments for the Parallel Port Connector
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
STROBE#
I/O
2
D0
I/O
3
D1
I/O
4
D2
I/O
5
D3
I/O
6
D4
I/O
7
D5
I/O
8
D6
I/O
9
D7
I/O
10
ACK#
I
11
BUSY
I
12
PE
I
13
SLCT
I
14
AUTO FD XT#
O
15
ERROR#
I
16
INIT#
O
17
SLCT IN#
O
18
Ground
NA
19
Ground
NA
20
Ground
NA
21
Ground
NA
22
Ground
NA
23
Ground
NA
24
Ground
NA
25
Ground
NA
Appendix A. Connector Pin Assignments
49
Appendix A. Connector Pin Assignments
Serial Port Connectors
5
1
6
9
Figure 13. Serial Port Connector
The external interface for the serial ports consists of two, 9-pin, male, D-shell connectors.
Table 46. Pin Assignments for the Serial Port Connectors
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
Data carrier detect
I
2
Receive data#
I
3
Transmit data#
O
4
Data terminal read
O
5
Ground
NA
6
Data set ready
I
7
Request to send
O
8
Clear to send
I
9
Ring indicator
I
Keyboard and Mouse Port Connectors
6
5
4
3
2
1
Figure 14. Keyboard and Mouse Port Connector
The keyboard and mouse ports each have a 6-pin, mini-DIN external connector.
Table 47. Pin Assignments for the Keyboard and Mouse Connectors
Pin
Signal Name
I/O
Pin
Signal Name
I/O
1
Data
I/O
2
Reserved
NA
3
Ground
NA
4
+5 V dc
NA
5
Clock
I/O
6
Reserved
NA
50
Technical Information Manual
Appendix A. Connector Pin Assignments
Monitor Port Connector
5
1
10
6
15
11
Figure 15. Monitor Connector
The external interface for the video subsystem is a 15-pin, female, D-shell, DDC2B-compliant connector
located at the rear of the graphics adapter.
Table 48. Pin Assignments for the Monitor Connector
Pin
Signal Name
I/O
1
Red
O
2
Green
O
3
Blue
O
4
Monitor ID2 - not used
I
5
Ground
NA
6
Red ground
NA
7
Green ground
NA
8
Blue ground
NA
9
+5 V, used by DDC2B
NA
10
Ground
NA
11
Monitor ID 0 - not used
I
12
DDC2B serial data
I/O
13
Horizontal sync.
O
14
Vertical sync.
O
15
DDC2B clock
I/O
Note: All inputs and outputs are with respect to the system board.
Appendix A. Connector Pin Assignments
51
Appendix A. Connector Pin Assignments
Ethernet Connector
8
2
7
1
Figure 16. Ethernet Connector
The external interface for the Ethernet port is an 8-pin, RJ-45 connector.
Table 49. Pin Assignments for the Ethernet Connector
Pin
Signal Name
I/O
1
TxD+
O
2
TxD−
O
3
RxD+
I
4
Ground
NA
5
Ground
NA
6
RxD−
I
7
Ground
NA
8
Ground
NA
52
Technical Information Manual
Appendix B. System Address Maps
Appendix B. System Address Maps
System Memory Map
Memory can be mapped differently if POST detects an error.
Table 50. System Memory Map (Fixed Address Ranges)
Address Range (Dec)
Address Range (Hex)
Size
Description
0–511 KB
00000–7FFFF
512 KB
Conventional
512 KB–638 KB
80000–9FBFF
127 KB
Extended conventional
639 KB
9FC00–9FFFF
1 KB
Extended BIOS data (moveable
by HIMEM, QEMM, 386MAX)
640 KB–767 KB
A0000–BFFF
128 KB
Video RAM
768 KB–799 KB
C0000–C7FFF
32 KB
Video ROM BIOS (shadowed)
800 KB–895 KB
C8000–DFFFF
96 KB
PCI/ISA space – available to ISA
adapter ROMs
896 KB–1 MB
E0000–EFFFF
128 KB
System POST only - available
after boot
ROM BIOS
F0000–FFFFF
1 MB–16 MB
100000–FFFFFF
15 MB
PCI/ISA space
16 MB–4095.872 MB
1000000–FFFDFFFF
4079.9 MB
PCI space (positive decode)
4095.872 MB–4096 (4 GB)
FFFE0000–FFFFFFFF
128 KB
System ROM BIOS (ISA bus)
 Copyright IBM Corp. 1998
53
Appendix B. System Address Maps
Input/Output Address Map
The following table lists resource assignments for the I/O address map. Any addresses that are not
shown are reserved.
Table 51 (Page 1 of 2). Input/Output Address Map
Address (Hex)
Size (Dec)
Description
0000–001F
32 bytes
DMA 1
0020–002D
0030–003F
30 bytes
Interrupt controller 1
002E–002F
2 bytes
Super I/O controller system board Plug-and-Play index/data registers
(index=002E, data=002F)
0040–0043
0050–0053
8 bytes
Counter/timer 1
0044–004F
0054–005F
24 bytes
General I/O locations—available to ISA bus
0060
1 byte
Keyboard controller, data byte (on ISA data bus)
0061
1 byte
System port B
0064
1 byte
Keyboard controller, command and status byte (on ISA data bus)
0062, 0063,
0065–006F
13 bytes
General I/O locations—available to ISA bus
0070, bit 7 write
only
1 bit
Enable/disable NMI
0070, bits 6—0
7 bits
Real-time clock, address (on ISA bus)
0071
1 byte
Real-time clock, data (on ISA bus)
0072—0077
6 bytes
Real-time clock addresses and data
0078
4 bytes
General purpose I/O (GPIO)
007C
4 bytes
General purpose I/O (GPIO)
0080
1 byte
POST checkpoint register during POST only
0080–008F
16 bytes
DMA page registers
0090–009F
16 bytes
General I/O locations—available to ISA bus
00A0–00B1
00B4–00BF
30 bytes
Interrupt controller 2
00B2
1 byte
Advanced power management control
00B3
1 byte
Advanced power management status
00C0–00DF
32 bytes
DMA 2
00E0–00EF
16 bytes
General I/O locations—availabe to ISA bus
00F0
1 byte
Coprocessor error register
00F1–00FF
15 bytes
General I/O locations—available to ISA bus
0170–0177
8 bytes
IDE channel 1
01F0–01F7
8 bytes
IDE channel 0
0220–0227
8 bytes
Audio
0278–027F
8 bytes
LPT3
02E8–02EF
8 bytes
COM4
02F8–02FF
8 bytes
COM2
0376–0377
2 bytes
IDE channel 1
0378–037F
8 bytes
LPT2
03BC–03BE
4 bytes
LPT1 (system board)
54
Technical Information Manual
Appendix B. System Address Maps
Table 51 (Page 2 of 2). Input/Output Address Map
Address (Hex)
Size (Dec)
Description
03E8–03EF
8 bytes
COM3
03F0–03F5
6 bytes
Diskette drive channel 0
03F6
1 byte
IDE channel 0
03F7, bit 7
1 bit
Diskette change
03F7, bits 6:0
7 bits
IDE status channel 0
03F8–03FF
8 bytes
COM1
04D0
1 byte
Interrupt edge/level control 1
04D1
1 byte
Interrupt edge/level control 2
0CF8–0CFB
4 bytes
PCI configuration address register
0CF9
1 byte
Reset control register
0CFC–0CFF
4 bytes
PCI configuration data register
Appendix B. System Address Maps
55
Appendix B. System Address Maps
DMA I/O Address Map
The following table lists resource assignments for the DMA address map. Any addresses that are not
shown are reserved.
Table 52 (Page 1 of 2). DMA I/O Addresses
9
Address (Hex)
Description
Bits
Byte Pointer
0000
Channel 0, Memory Address register
00–15
Yes
0001
Channel 0, Transfer Count register
00–15
Yes
0002
Channel 1, Memory Address register
00–15
Yes
0003
Channel 1, Transfer Count register
00–15
Yes
0004
Channel 2, Memory Address register
00–15
Yes
0005
Channel 2, Transfer Count register
00–15
Yes
0006
Channel 3, Memory Address register
00–15
Yes
0007
Channel 3, Transfer Count register
00–15
Yes
0008
Channels 0–3, Read Status/Write Command register
00–07
0009
Channels 0–3, Write Request register
00–02
000A
Channels 0–3, Write Single Mask register bits
00–02
000B
Channels 0–3, Mode register (write)
00–07
000C
Channels 0–3, Clear byte pointer (write)
NA
000D
Channels 0–3, Master clear (write)/temp (read)
00–07
000E
Channels 0–3, Clear Mask register (write)
00–03
000F
Channels 0–3, Write All Mask register bits
00–03
0081
Channel 2, Page Table Address register9
00–07
0082
Channel 3, Page Table Address
register9
00–07
0083
Channel 1, Page Table Address
register9
00–07
0087
Channel 0, Page Table Address register9
00–07
0089
Channel 6, Page Table Address register9
00–07
008A
Channel 7, Page Table Address
register9
00–07
008B
Channel 5, Page Table Address register9
00–07
008F
Channel 4, Page Table Address/Refresh register
00–07
00C0
Channel 4, Memory Address register
00–15
Yes
00C2
Channel 4, Transfer Count register
00–15
Yes
00C4
Channel 5, Memory Address register
00–15
Yes
00C6
Channel 5, Transfer Count register
00–15
Yes
00C8
Channel 6, Memory Address register
00–15
Yes
00CA
Channel 6, Transfer Count register
00–15
Yes
00CC
Channel 7, Memory Address register
00–15
Yes
00CE
Channel 7, Transfer Count register
00–15
Yes
00D0
Channels 4–7, Read Status/Write Command register
00–07
00D2
Channels 4–7, Write Request register
00–02
00D4
Channels 4–7, Write Single Mask register bit
00–02
Upper byte of memory address register.
56
Technical Information Manual
Appendix B. System Address Maps
Table 52 (Page 2 of 2). DMA I/O Addresses
Address (Hex)
Description
Bits
00D6
Channels 4–7, Mode register (write)
00–07
00D8
Channels 4–7, Clear byte pointer (write)
NA
00DA
Channels 4–7, Master clear (write)/temp (read)
00–07
00DC
Channels 4–7, Clear Mask register (write)
00–03
00DE
Channels 4–7, Write All Mask register bits
00–03
00DF
Channels 5–7, 8- or 16-bit mode select
00–07
Byte Pointer
Appendix B. System Address Maps
57
Appendix C. IRQ and DMA Channel Assignments
Appendix C. IRQ and DMA Channel Assignments
The following tables list the IRQ (interrupt request) and DMA (direct memory access) channel assignments
for IntelliStation M Pro computers.
Table 53. IRQ Channel Assignments
IRQ
System Resource
NMI
Critical system error
SMI
System management interrupt – power management
0
Reserved, internal timer
1
Reserved, keyboard buffer full
2
Reserved, cascade interrupt from slave PIC
3
COM2, COM4 if enabled; otherwise, user available for ISA or PCI bus
4
COM1, COM3 if enabled; otherwise, user available for ISA bus
5
LPT3 if enabled; otherwise, user available for ISA or PCI bus
6
Diskette drive controller
7
LPT1, LPT2 if enabled; otherwise, user available for ISA bus
8
Reserved, real-time clock
9
ACPI if enabled; otherwise, user available for ISA or PCI bus
10
User available for ISA or PCI bus
11
User available for ISA or PCI bus
12
System board mouse port if enabled; otherwise, user available for ISA or PCI bus
13
Reserved, math coprocessor
14
IDE primary channel if enabled; otherwise user available for ISA or PCI bus
15
IDE secondary channel if enabled; otherwise user available for ISA or PCI bus
Note: Audio IRQ and DMA resources are required and are assigned by the Plug and Play BIOS or
operating system.
Table 54. DMA Channel Assignments
DMA Channel
Data Width
System Resource
0
8 bits only
User available for ISA bus
1
8 bits only
User available for ISA bus
2
8 bits only
Reserved, diskette drive
3
8 bits only
Parallel port if ECP; otherwise user available for ISA bus
4
Reserved–cascade channel
5
16 bits only
User available for ISA bus
6
16 bits only
User available for ISA bus
7
16 bits only
User available for ISA bus
Note: Channels 0–3 can transfer data in 64 KB pages; channels 5–7 can transfer data in 128 KB pages.
58
 Copyright IBM Corp. 1998
Appendix D. Error Codes
Appendix D. Error Codes
The following tables list the POST error codes and beep error codes for the IntelliStation M Pro.
POST Error Codes
POST error messages appear when POST finds problems with the hardware during power-on or when a
change in the hardware configuration is found. POST error messages are 3-, 4-, 5-, 8-, or 12-character
alphanumeric messages. An x in an error message can represent any number.
Table 55 (Page 1 of 2). POST Error Codes
Code
Description
101
Interrupt failure
102
Timer failure
106
System board failure
111
I/O parity error 2 (I/O channel check latch set)
114
External ROM checksum error
121
Hardware error
151
Real time clock failure
161
Bad CMOS Battery
162
CMOS RAM checksum/configuration error
163
Clock not updating
164
CMOS RAM memory size does not match
167
Clock not updating
168
Alert on LAN is not working correctly.
175
System board error
176
System cover has been removed.
177
An inventory violation occurred, such as a hardware component was removed. This error message is part
of the AssetCare and Asset ID features of the computer.
184
Asset control antenna not detected.
186
System board or hardware security error
187
Administrator password and boot sequences have been cleared.
190
The computer chassis-intrusion detector was cleared. This is an informational message. No action is
required.
201
Memory data error
202
Memory address line error 00-15
203
Memory address line error 16-23
301
Keyboard error
303
Keyboard to system board interface error
601
Diskette drive or controller error
602
Diskette IPL boot record not valid
604
Unsupported diskette drive installed
662
Diskette drive configuration error
762
Math coprocessor configuration error
11xx
Serial port error (xx = serial port number)
Appendix C. IRQ and DMA Channel Assignments
59
Appendix D. Error Codes
Table 55 (Page 2 of 2). POST Error Codes
Code
Description
1762
Hard disk configuration error
1780
Hard disk 0 failed
1781
Hard disk 1 failed
1782
Hard disk 2 failed
1783
Hard disk 3 failed
1800
A PCI adapter has requested an unavailable hardware interrupt.
1801
A PCI adapter has requested an unavailable memory resource.
1802
A PCI adapter has requested an unavailable I/O address space, or the adapter is defective.
1803
A PCI adapter has requested an unavailable memory address space, or the adapter is defective.
1804
A PCI adapter has requested unavailable memory addresses.
1805
PCI adapter ROM error
1880
A Plug and Play adapter has requested a hardware interrupt that is not available.
1881
A Plug and Play adapter has requested memory resources that are not available.
1882
A Plug and Play adapter has requested an I/O address that is not available, or the Plug and Play adapter
might be defective.
1883
A Plug and Play adapter has requested a memory address that is not available, or the Plug and Play
adapter might be defective.
1884
A Plug and Play adapter has requested a memory address that is not available.
1885
A Plug and Play adapter read-only memory (ROM) error occurred.
1886
A Plug and Play adapter has requested a DMA address that is not available.
1962
Boot sequence error
8603
Pointing device or system board error
I9990301
Hard disk failure
60
Technical Information Manual
Appendix D. Error Codes
Beep Codes
For the following beep codes, the numbers indicate the sequence and number of beeps. For example, a
“2-3-2” error symptom (a burst of two beeps, three beeps, then two beeps) indicates a memory module
problem. An x in an error message can represent any number.
Table 56. Beep Codes
Beep Code
Probable Cause
1-1-3
CMOS write/read failure
1-1-4
BIOS ROM checksum failure
1-2-1
Programmable interval timer test failure
1-2-2
DMA initialization failure
1-2-3
DMA page register write/read test failure
1-2-4
RAM refresh verification failure
1-3-1
1st 64 K RAM test failure
1-3-2
1st 64 K RAM parity test failure
2-1-1
Slave DMA register test in progress or failure
2-1-2
Master DMA register test in progress or failure
2-1-3
Master interrupt mask register test failure
2-1-4
Slave interrupt mask register test failure
2-2-2
Keyboard controller test failure
2-3-2
Screen memory test in progress or failure
2-3-3
Screen retrace tests in progress or failure
3-1-1
Timer tick interrupt test failure
3-1-2
Interval timer channel 2 test failure
3-1-4
Time-of-Day clock test failure
3-2-4
Comparing CMOS memory size against actual
3-3-1
Memory size mismatch occurred
Appendix D. Error Codes
61
Appendix E. Notices and Trademarks
Appendix E. Notices and Trademarks
This appendix gives legal notice of IBM product availability, patents, and patents pending, as well as
trademark information.
Notices
References in this publication to IBM products, programs, or services do not imply that IBM intends to
make these available in all countries in which IBM operates. Any reference to an IBM product, program,
or service is not intended to state or imply that only that IBM product, program, or service may be used.
Subject to IBM’s valid intellectual property or other legally protectable rights, any functionally equivalent
product, program, or service may be used instead of the IBM product, program, or service. The evaluation
and verification of operation in conjunction with other products, except those expressly designated by IBM,
are the responsibility of the user.
IBM may have patents or pending patent applications covering subject matter in this document. The
furnishing of this document does not give you any license to these patents. You can send license
inquiries, in writing, to:
IBM Director of Licensing
IBM Corporation
North Castle Drive
Armonk, NY 10504-1785
U.S.A.
Year 2000 Readiness and Instructions
This is a Year 2000 Readiness Disclosure.
A product is Year 2000 Ready if the product, when used in accordance with its associated documentation,
is capable of correctly processing, providing and/or receiving date data within and between the 20th and
21st centuries, provided all other products (for example, software, hardware, and firmware) used with the
product properly exchange date data with it.
This IBM PC hardware product has been designed to process four-digit date information correctly within
and between the 20th and 21st centuries. If your IBM computer is on when the century changes, you
should turn it off and then back on again once, or restart the operating system, to ensure that the internal
clock resets itself for the new century.
This IBM PC product cannot prevent errors that might occur if software you use or exchange data with is
not ready for the Year 2000. IBM software that comes with this product is Year 2000 Ready. However,
software from other companies might come with this IBM PC product. IBM cannot take responsibility for
the readiness of that software. You should contact the software developers directly if you wish to verify
readiness, understand limitations, or look for any software updates.
To learn more about IBM PC products and the Year 2000, visit our Web site at
http://www.pc.ibm.com/year2000. The information and tools there can help you with your Year 2000
transition plan, especially if you have multiple IBM PCs. IBM encourages you to check periodically for
updated information.
62
 Copyright IBM Corp. 1998
Appendix E. Notices and Trademarks
Trademarks
The following terms are trademarks of the IBM Corporation in the United States or other countries or both:
Alert on LAN
AT
IBM
IntelliStation
OS/2
Personal Computer AT
SurePath
Wake on LAN
XT
Intel, MMX, and Pentium are trademarks or registered trademarks of Intel Corporation.
Microsoft, Windows, and Windows NT are trademarks or registered trademarks of Microsoft Corporation.
Other company, product, and service names may be trademarks or service marks of others.
Appendix E. Notices and Trademarks
63
References
General Sources
World Wide Web Sources
Advanced Power Management (APM) BIOS Interface
Specification 1.2
Source: Intel Corporation
82440BX PCI and Memory Controller
Source: Intel Corporation; available at
http://developer.intel.com/design/agpsets/440BX
AT Attachment Interface with Extensions
Source: American National Standard of Accredited
Standards Committee
82371SB PCI ISA IDE Xcelerator (PIIX4)
Source: Intel Corporation; available at
http://developer.intel.com/design/pcisets/datashts/290562.htm
Extended Capabilities Port: Specification Kit
Source: Microsoft Corporation
Plug and Play BIOS Specification 1.0a
Source: Microsoft Corporation; available at
http://www.microsoft.com/hwdev
Intel Microprocessor and Peripheral Component
Literature
Source: Intel Corporation
Universal Serial Bus Specifications
Source: http://www.usb.org
PCI BIOS Specification 2.1
Source: PCI Special Interest Group
Video Electronics Standards Association 1.2
Source: http://www.vesa.org
PCI Local Bus Specification 2.1
Source: PCI Special Interest Group
Plug and Play BIOS Specification, Errata and
Clarifications
Source: Microsoft Corporation
64
 Copyright IBM Corp. 1998
Index
Index
A
ACPI 5
adapters
supported 25
Wake on LAN 20, 25
address map
DMA 56
I/O 54
system memory 53
advanced configuration and power interface
advanced power management 5
AGP
bus connector 40
connector 10
interface 10
altitude 30
APIC controller 33
APM 5
audio
features 17
jacks 17
B
battery 15
beep codes 61
BIOS
bypassing 35
data areas 53
features 3
updates 5
bus
AGP 10, 23, 40
IDE 11
ISA 10, 23
PCI 10, 23
universal serial 12
bus master interface 11
D
C
cables 30
CD-ROM drive 25
chip set control 9
clock, real-time 15
CMOS RAM 15
CMOS-clear jumper 15, 21
compatibility
hardware 32
software 35
configuration/setup utility program
 Copyright IBM Corp. 1998
5
connectors
AGP 10, 23, 40
audio 17
DIMM 9
diskette drive 13, 43
Ethernet 18, 52
IDE 11, 42
input/output 24
ISA 23, 36
keyboard/mouse 15, 50
memory 9
monitor 51
parallel port 14, 49
PCI 23, 38
power supply 29
SCSI 18, 44, 45
serial ports 14, 50
system board 22
system memory (DIMM) 46
USB 12, 49
video 51
controller, super input/output 13
copy protection 35
Crystal 4235 audio subsystem 17
current, electrical 31
5
depth, system unit 30
Desktop Management Interface (DMI) 19
device drivers
for built-in features 7
operating system 6
video 16
diagnostic programs 6
DIMM connectors 9
diskette drive
change signal 35
characteristics 25, 34
compatibility 35
connector 43
controller 34
interface 13
write current 35
write protect switch 21
DMA
channel assignments 58
I/O address map 56
DRAM (dynamic random access memory) 9
drives, internal 25
dual inline memory modules (DIMMs) 9
65
Index
E
electrical input 31
electromagnetic compatibility 30
environment, operating 30
error codes, POST 59
Ethernet
enable/disable switch 20
features 18
port 18, 52
expansion 2, 23
58
J
jumper, system board
21
K
F
fault, overvoltage 29
features
hardware 1
operating system support 6
software 3
flash update 5
frequency, input power 26, 31
keyboard
cable 30
port 15, 50
L
level-sensitive interrupts
33
M
G
graphics adapters
16
H
hard disk drive
characteristics 25
compatibility 35
IDE interface 11
reading/writing 35
hardware
compatibility 32
features 1
interrupts 33
heat output 31
height, system unit 30
humidity 30
I
IDE
connectors 42
hard disk drive 25
interface 11
input/output (I/O)
address map 54
connectors 24
controller 13
system 10
Intergraph Intense 3D Pro 3400 PCI graphics
adapter 16
internal drives 25
interrupts
hardware 33
66
interrupts (continued)
software 35
IRQ (interrupt request) assignments
ISA
bus 10, 23
connector 23, 36
Technical Information Manual
machine-sensitive programs 35
Matrox Millennium G200 AGP graphics adapter 16
Matrox Millennium II AGP graphics adapter 16
measurements, system unit 30
mechanical specifications 30
memory
connectors 46
DIMMs 9
map, system 53
RAM 53
system 9
messages, POST error 59
microprocessor
features 8
second 8
socket 8
switch settings 20
modes
ACPI BIOS 5
power management 5
monitor port 51
mouse port 15, 50
O
operating system support
overvoltage fault 29
6
P
parallel port 14, 49
password enable/disable switch
PC Doctor 6
20
Index
PCI
AGP connector 23
bus 10, 23
connectors 23, 38
RAIDport connection 23
PCI-to-ISA bridge 10
Pentium II microprocessor with MMX technology 8
physical specifications 30
pin assignments
AGP connector 40
diskette drive connector 43
Ethernet connector 52
IDE connectors 42
ISA connector 36
keyboard/mouse connectors 50
monitor connector 51
parallel port connector 49
PCI connectors 38
SCSI, 50-pin connector 44
SCSI, 68-pin connectors 45
serial port connectors 50
system memory (DIMM) 46
USB connectors 49
video connector 51
Plug and Play 4
polling mechanism 35
ports
audio 17
Ethernet 18, 52
keyboard/mouse 15, 50
monitor 51
parallel 14, 49
SCSI 18
serial 14, 50
USB 12, 49
video 51
POST
description 5
error codes 59
power
advanced configuration and power interface 5
advanced power management 5
cable 30
input 27
output capacity 27
output protection 29
specifications 31
supply 26
power management 10
protection, power supply 29
publications, related ix
R
RAIDport connection
18
RAM (random access memory)
random access memory (RAM)
real-time clock 15
references 64
reserved areas viii
53
53
S
SCSI
50-pin connector 44
68-pin connectors 45
cable 30
controller 18
hard disk drive 25
serial ports 14, 50
short circuit 29
size, system unit 30
socket, microprocessor 8
software
compatibility 35
features 3
interrupts 35
operating system support 6
system 3
specifications, physical 30
STB GLyder MAX-2+ AGP graphics adapter
switches, system board 20
system board
features 8
jumper 21
layout 22
switches 20
system management controller 19
system resource assignments
audio 17
diskette interface 13
Ethernet 18
IDE interface 11
keyboard/mouse 15
parallel port 14
real-time clock 15
serial ports 14
system management controller 19
16
T
tape backup 13
temperature 30
U
universal serial bus (USB)
ports 12, 49
technology 12
updates, BIOS 5
Index
67
Index
V
video
device drivers 16
port 51
subsystem 16
video adapters 16
voltage
input power 27
output power 27
W
Wake on LAN
adapters 20, 25
controller 18
warning, reserved areas viii
weight, system unit 30
width, system unit 30
write current, diskette 35
write-protect switch, diskette drive
68
Technical Information Manual
21
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