IBM IntelliStation M Pro Technical document

Technical Information Manual
IntelliStation M Pro
Professional Workstation (Type 6898)

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.
First Edition (November 1997)
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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 1997. 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Manual Style . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Chapter 1. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Software Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
System Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
BIOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Plug and Play ................................................. 3
POST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Configuration/Setup Utility Program .................................... 4
Advanced Power Management ....................................... 4
Advanced Configuration and Power Interface (ACPI) .......................... 4
Flash Update Utility Program ........................................ 5
Diagnostic Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Device Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operating System Support ........................................... 5
Chapter 2. System Board Features ...................................... 7
Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Chip Set Control .................................................. 7
System Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PCI-to-ISA Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
System I/O and Power Management ..................................... 8
AGP Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
IDE Bus Master Interface ........................................... 10
USB Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Super Input/Output Controller ........................................... 12
Diskette Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Parallel Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Serial Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Keyboard and Mouse Ports .......................................... 14
General-Purpose I/O Ports ........................................... 14
Real-Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Small Computer System Interface (SCSI) Controller ............................. 18
System Management Controller ......................................... 18
System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Physical Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
System Board Switches .............................................. 21
System Board Jumper ............................................... 22
Chapter 3. Adapters and Internal Drives .................................. 23
Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Cabling Requirements for Wake on LAN Adapters ............................. 23
Video Graphics Adapters ............................................. 24
Video Device Drivers .............................................. 24
Internal Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
 Copyright IBM Corp. 1997 iii

Chapter 4. Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Power Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Output Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Power Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Chapter 5. Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Chapter 6. System Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Hardware Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Hardware Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
APIC Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Diskette Drives and Controller ......................................... 34
Hard Disk Drives and Controller ........................................ 35
Software Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Software Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Machine-Sensitive Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Appendix A. Connector Pin Assignments .................................. 36
ISA Bus Connectors ................................................ 36
PCI Bus Connectors ................................................ 38
AGP Bus Connector ................................................ 40
IDE Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Diskette Drive Connector ............................................. 43
SCSI 50-pin Connector .............................................. 44
SCSI 68-pin Connector .............................................. 45
System Memory Connectors ........................................... 46
USB Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Parallel Port Connector .............................................. 49
Serial Port Connectors ............................................... 50
Keyboard and Mouse Port Connectors ..................................... 50
Monitor Port Connector .............................................. 50
Ethernet Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Appendix B. System Address Maps ..................................... 53
System Memory Map ............................................... 53
Input/Output Address Map ............................................ 54
DMA I/O Address Map ............................................... 56
Appendix C. IRQ and DMA Channel Assignments ............................ 58
Appendix D. Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
POST Error Codes ................................................. 59
Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Appendix E. Notices and Trademarks .................................... 62
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
General Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
World Wide Web Sources ........................................... 63
iv Technical Information Manual

Tables
1. System Resource Assignments for the IDE Interface .......................... 10
2. System Resource Assignments for the Diskette Interface ....................... 12
3. System Resource Assignments for the Parallel Port .......................... 13
4. System Resource Assignments for the Serial Ports ........................... 13
5. System Resource Assignments for the Keyboard and Mouse ..................... 14
6. System Resource Assignments for the Real-Time Clock ........................ 14
7. System Resource Assignments for the Audio Controller ........................ 15
8. System Resource Assignments for the Ethernet Controller ...................... 16
9. System Resource Assignments for the System Management Controller ............... 18
10. Microprocessor Speed (Switches 1-4) .................................. 21
11. ROM Recovery (Switch 5) ......................................... 21
12. System Board Ethernet Control (Switch 6) ................................ 21
13. Privileged Access Password Control (Switch 7) ............................. 21
14. Diskette Drive Write Access (Switch 8) .................................. 22
15. CMOS Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
16. Diskette Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
17. IDE and SCSI Devices ........................................... 25
18. Power Output for 330-Watt Power Supply ................................ 27
19. System Board Power Connectors ..................................... 27
20. ISA-Bus Adapters (Per Slot) ........................................ 28
21. PCI-Bus Adapters (Per Slot) ........................................ 28
22. Typical AGP Adapter ............................................ 28
23. Internal 9.11 GB SCSI Drive ........................................ 28
24. Keyboard Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
25. USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
26. Pin Assignments for the 4-Pin Power Connectors ............................ 29
27. Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
28. Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
29. Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
30. Air Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
31. Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
32. Electrical Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
33. Heat Output (Approximate) ......................................... 31
34. IO APIC Resources ............................................. 34
35. 3.5-Inch Diskette Drive Reading, Writing, and Formatting Capabilities ................ 34
36. Pin Assignments for the ISA Bus Connectors .............................. 36
37. Pin Assignments for the PCI Bus Connectors .............................. 38
38. Pin Assignments for the AGP Bus Connector .............................. 40
39. Pin Assignments for the IDE Connectors ................................. 42
40. Pin Assignments for the Diskette Drive Connector ........................... 43
41. Pin Assignments for the SCSI 50-pin Connector ............................ 44
42. Pin Assignments for the SCSI 68-pin Connector ............................ 45
43. Pin Assignments for the DIMM Connectors ............................... 46
44. Pin Assignments for the USB Connectors ................................ 49
45. Pin Assignments for the Parallel Port Connector ............................ 49
46. Pin Assignments for the Serial Port Connectors ............................. 50
47. Pin Assignments for the Keyboard and Mouse Connectors ...................... 50
48. Pin Assignments for the Monitor Connector ............................... 51
49. Pin Assignments for the Ethernet Connector ............................... 52
50. System Memory Map (Fixed Address Ranges) ............................. 53
 Copyright IBM Corp. 1997 v

51. Input/Output Address Map ......................................... 54
52. DMA I/O Addresses ............................................. 56
53. IRQ Channel Assignments ......................................... 58
54. DMA Channel Assignments ........................................ 58
55. POST Error Codes ............................................. 59
56. Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Figures
1. System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2. ISA Bus Connector ............................................. 36
3. PCI Bus Connector ............................................. 38
4. AGP Bus Connector ............................................. 40
5. IDE Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6. Diskette Drive Connector .......................................... 43
7. SCSI 50-pin Connector ........................................... 44
8. SCSI 68-pin Connector ........................................... 45
9. System Memory (DIMM) Connector .................................... 46
10. USB Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
11. Parallel Port Connector ........................................... 49
12. Serial Port Connector ............................................ 50
13. Keyboard and Mouse Port Connector ................................... 50
14. Monitor Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
15. Ethernet Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
vi Technical Information Manual

Preface
This Technical Information Manual provides information on the IBM IntelliStation M Pro (Type 6898). This
manual is intended for developers who want to provide hardware and software products to operate with
their computer. It provides in-depth information on how the computer works. 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 1024 bytes (2 10), 1 MB equals 1048576 bytes (2 20), and 1 GB equals 1073741824 bytes
(230).
When expressing storage capacity, MB equals 1000 KB (1024000). The value is determined by counting
the number of sectors and assuming that every two sectors equals 1 KB. 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.
 Copyright IBM Corp. 1997 vii

Related Publications
In addition to this manual, the following IBM publications provide information about the operation of the
IntelliStation M Pro. 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.
 Setting Up Your IntelliStation M Pro
This publication contains instructions on preparing the computer for operation.
 Using Your IntelliStation M Pro
This publication contains information on configuring, operating, and maintaining the computer. Also
included are warranty information, instructions for diagnosing and solving problems, and information on
how to obtain help and service.
 Installing Options in Your IntelliStation M Pro
This publication contains instructions for installing options in the computer.
 Understanding Your IntelliStation M Pro
This publication includes general information about using computers and detailed information about the
features of IntelliStation M Pro computers. It is available on the Ready-to-Configure Utility Program
CD that comes with your computer.
 About Your Software
This publication (provided only with computers that have IBM-preinstalled software) contains
information about the preinstalled software package.
 Your Ready-to-Configure Utility Program CD
This publication contains information about the Ready-to-Configure CD that comes with IntelliStation
M Pro computers. The publication also contains instructions for starting the CD.
 Adaptec SCSI Documentation
This documentation, which is provided on the Ready-to-Configure Utility Program CD that comes with
your computer, includes information on configuring the adapter and instructions for installing and
configuring SCSI devices.
 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 (http://www.us.pc.ibm.com/cdt/hmm.html), and it can also be
ordered from IBM. To purchase a copy, refer to the "Getting Help, Service, and Information" section in
Using Your IntelliStation M Pro .
 Compatibility Report
This publication contains information about compatible hardware and software for IntelliStation M Pro
computers. The publication is available on the World Wide Web (http://www.us.pc.ibm.com/cdt).
viii 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 are:
Intel Pentium II processor with MMX technology
Support for up to 512 MB of system memory
Busmaster Ultra-DMA IDE controller
Dual channel Ultra SCSI host controller
EIDE or Ultra Wide SCSI hard disk drive
CD-ROM drive
3.5-inch, 1.44 MB diskette drive
A preinstalled Glyder MAX-2 2D/3D Graphics Accelerator or Intergraph Intense 3D Pro 2200 graphics
adapter.
Integrated 16-bit, stereo audio controller (supports Sound Blaster Pro applications)
– Built-in, high-quality speaker
Integrated EtherExpress PRO/100B PCI LAN subsystem.
System Management
– RPL (Remote Program Load) and DHCP (Dynamic Host Configuration Protocol)
– Integrated Wake on LAN controller
– Automatic power-on startup sequence
– POST/BIOS update from network
– DMI (Desktop Management Interface) BIOS and DMI software
– Integrated system management controller
Input/Output Features
– Two serial ports
– One ECP/EPP parallel port
– One monitor port on the graphics adapter
– Three 3.5 mm audio jacks (line out, line in, and microphone)
– One Ethernet RJ-45 port
– Two USB (universal serial bus) ports
– One keyboard port (Windows 95-compatible)
– One mouse port
 Copyright IBM Corp. 1997 1

Chapter 1. System Overview
Expansion
– Six drive bays, six expansion slots (one AGP, three dedicated PCI, one shared PCI/ISA, and
one dedicated ISA)
Several model variations are available for IntelliStation M Pro computers. The following list describes
some of the ways in which the models vary:
Microprocessor speed
Hard disk type and capacity
Amount of system memory preinstalled
Type of video adapter preinstalled
Type of operating system software preinstalled
2Technical 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:
Basic input/output system (BIOS)
Plug and Play
Power-on self-test (POST)
Configuration/Setup Utility program
Advanced Power Management (APM)
Flash update utility program
Diagnostic programs
BIOS
IntelliStation M Pro computers have an IBM BIOS. Support is provided for the following features:
PCI bus, according to the PCI BIOS Specification (Version 2.1)
Plug and Play, according to the ISA Plug and Play BIOS Specification (Version 1.2)
Advanced Power Management, according to the APM BIOS Interface Specification (Version 1.2)
Advanced Configuration and Power Interface (ACPI) BIOS mode
Desktop Management BIOS, according to DMI Specification 2.0a
IDE LBA to allow access to hard disks with a capacity greater than 527 MB
Intel 82440LX core chipset
Intel Ethernet BIOS
Crystal audio setup BIOS
National System Management BIOS
Initialization of National Semiconductor N87307 I/O chip, with Plug and Play support
Bootable CD-ROM
DBCS code (for Japanese systems only)
Wake on LAN
RPL (Remote Program Load) and DHCP (Dynamic Host Configuration Protocol)
Flash over LAN
Alternate boot sequence
Enable/disable of system board Ethernet controller
Enable/disable of system board SCSI controller
Plug and Play
IntelliStation M Pro computers conform to the following:
 ISA Plug and Play BIOS Specification (Version 1.2)
 ISA Plug and Play BIOS Specification, Errata and Clarifications (Version 1.0) , as released by Microsoft
Chapter 1. System Overview 3

Chapter 1. System Overview
IntelliStation M Pro computers also conform to the guidelines described in the following:
 Plug and Play BIOS Extension Design Guide (Version 1.0)
 Guide to Integrating the Plug and Play BIOS Extensions with System BIOS (Version 1.1)
 Plug and Play Kit for DOS and Windows
POST
IntelliStation M Pro computers use IBM power-on self-test (POST) software with initialization code added
for the Intel Pentium processor with MMX technology, the Intel 82440LX core chipset, the National
Semiconductor PC87307 I/O chip, the Adaptec AIC-7895 Dual SCSI controller, and the Intel 82557
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 Using Your
IntelliStation M Pro .
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 Using Your IntelliStation M Pro for further information on the Configuration/Setup Utility program.
Advanced Power Management
IntelliStation M Pro computers come with energy-saving software that meets Energy Star requirements.
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.1
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 Using
Your IntelliStation M Pro .
Advanced Configuration and Power Interface (ACPI)
IntelliStation M Pro computers support Advanced Configuration and Power Interface (ACPI) mode. ACPI
is a BIOS mode that when enabled, allows the operating system to control the power management
features of your computer. When ACPI is enabled, settings for APM BIOS mode are ignored. Not all
operating systems support ACPI BIOS mode. Refer to your operating system documentation to determine
if ACPI is supported.
1SCSI hard disk drives do not support APM.
4Technical Information Manual

Chapter 1. System Overview
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 on the World Wide Web (http://www.us.pc.ibm.com/files.html)
or 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 Using Your IntelliStation M Pro for further information.
Diagnostic Programs
An IBM Enhanced Diagnostics CD comes with your computer. It 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 downloaded from the World Wide Web. The
diagnostics are generally used when other methods are not accessible or have not been successful in
isolating a problem suspected to be hardware related.
The IBM Enhanced Diagnostics CD is not available on the World Wide Web. However, the latest version
of the IBM IntelliStation Diagnostic Diskette can be downloaded from the following World Wide Web page:
http://www.us.pc.ibm.com/intellistation/support
For more information, see Using Your IntelliStation M Pro .
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 (RTC) CD-ROM that is provided with
all IntelliStation M Pro computers models and they are available on the World Wide Web. See the
following World Wide Web page:
http://www.us.pc.ibm.com/intellistation/support
Operating System Support
Although a variety of operating systems can be used with IntelliStation M Pro computers, full function is
provided only with Windows 95 and Windows NT 4.0. When operating systems other than Windows 95
and Windows NT 4.0 are used, IntelliStation M Pro computers will work, but without all of the advanced
functions (for instance, the USB function is not supported with OS/2.) For a list of operating systems that
are compatible with IntelliStation M Pro computers, refer to Using Your IntelliStation M Pro and the IBM
online compatibility report on the World Wide Web at http://www.us.pc.ibm.com/cdt.
Note: An operating system 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 (RTC) CD-ROM is included with all models. The RTC CD-ROM
Chapter 1. System Overview 5

Chapter 1. System Overview
contains applications and device driver support for the preinstalled operating system (if applicable),
and several other operating systems.
6Technical Information Manual

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” on page 19.
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
3.3 V provided by the power supply to the core voltage required by the microprocessor.
The Pentium II processor with MMX technology features the following:
Optimization for 32-bit software
Operation at a lower voltage level than previous microprocessors
64-bit data bus
32-bit I/O bus
32 KB L1 cache (split into 16 KB write-through code cache and 16 KB write-back data cache)
66 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.
For information on replacing a microprocessor or installing an upgrade, refer to Installing Options in Your
IntelliStation M Pro .
Chip Set Control
IntelliStation M Pro computers use the third-generation Intel 82440LX chip set. The primary functions of
this chipset are:
Provides a bridge between the PCI bus and the microprocessor bus (For information on the PCI bus,
see “PCI-to-ISA Bridge” on page 8.)
Provides a DRAM controller and datapath
Provides an interface for the Accelerated Graphics Port (AGP)
The 82440LX module is fully compliant with PCI Local Bus Specification (Version 2.1) .
 Copyright IBM Corp. 1997 7

Chapter 2. System Board Features
System Memory
The system memory interface in IntelliStation M Pro computers is controlled by the Intel 82440LX chip set
module. (Refer to “Chip Set Control” for information on his 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:
A total of 512 MB of system memory
A maximum of 128 MB of system memory in each DIMM socket
Any configuration of DIMMs is acceptable. However, DIMMs must have the following characteristics:
Must be 64-bit wide or 72-bit wide error correcting code (ECC) synchronous DRAMs (SDRAMs)
Must be 32, 64, or 128 MB in size
Must be 168-pin, unbuffered, +3 V, serial PD type
Must have gold-lead tabs
Also, note the following:
64-bit wide and 72-bit wide modules and ECC modules can be mixed, but they will configure as 64-bit
wide
To enable ECC, all installed memory must be of the ECC type
IBM EDO-mode DIMMs are supported in full EDO configurations only
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 synchronously to the
host bus and is driven at a frequency of 33 MHz (half the speed of the 66 MHz microprocessor bus). 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 all the subsystems of the
ISA bus. These subsystems are:
An ISA-compatible interrupt controller that provides the function of two cascaded 82C59 interrupt
controllers
Three counters, equivalent to an 82C54 programmable interval timer
The function of two 82C37 DMA controllers with seven independent DMA channels (four 8-bit
channels and three 16-bit channels)
Power management features
For further information on the PIIX4 chipset module, refer to “Chip Set Control” on page 7.
8Technical Information Manual

Chapter 2. System Board Features
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:
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.
Chapter 2. System Board Features 9

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 with
Extensions . 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 7 for further information on the PIIX4 module.)
The primary and secondary IDE busses are routed to two connectors on the system board. A total of four
IDE devices can be attached to the two IDE system board connectors using ribbon cables. 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 IDE 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 IDE 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 IDE 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 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 24.
The following table shows the typical system resource assignments for the IDE interface.
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.
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
10 Technical Information Manual

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 7 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:
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.
Chapter 2. System Board Features 11

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 PC87307 chip. This chip, which is compatible with Plug and Play ISA
Specification 1.0a , supports and implements the following features:
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. (Refer to “Internal Drives” on
page 24 for more information). The following is a list of devices that the diskette interface will support:
1.44 MB, 3.5-inch diskette drive
1.44 MB, 3.5-inch, 3-mode drive for Japan
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.
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.
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
12 Technical Information Manual