IBM 6268 Technical document

Technical Information Manual
PC 300GL Types 6268, 6278, and 6288

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 42.
First Edition (September 1999)
The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with
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This publication was developed for products and services offered in the United States of America. IBM may not offer the products,
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Requests for technical information about IBM products should be made to your IBM reseller or IBM marketing representative.
 Copyright International Business Machines Corporation September 1999. All rights reserved.
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restrictions set forth in GSA ADP Schedule Contract with IBM Corp.

Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Related publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Terminology usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Chapter 1. System overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Major features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Other features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Network support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Wake on LAN .................................................. 2
Wake on Ring .................................................. 2
Chapter 2. System board features ...................................... 3
Celeron microprocessor with MMX technology ................................. 3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
L2 cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chip set control ................................................... 3
System memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PCI bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
IDE bus master interface ............................................ 5
USB interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Low pin count (LPC) bus ............................................ 5
Video subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Graphics memory controller hub (Super Video Graphics Array) ..................... 6
Monitor support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Video memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Audio subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Super input/output controller ........................................... 10
Diskette drive interface ............................................. 10
Serial ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Parallel port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Keyboard and mouse ports .......................................... 11
Network connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Real-time clock and CMOS ............................................ 12
Flash EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Expansion adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Physical layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
System board, types 6268, 6278, and 6288 ................................. 13
Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Cable connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Connector panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Chapter 3. Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
PC 300GL — desktop ............................................. 15
PC 300GL — tower ............................................... 16
Cabling requirements for Wake on LAN adapters ............................. 16
Chapter 4. Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Component outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
 Copyright IBM Corp. September 1999 iii

Output protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Connector description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Chapter 5. System software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
BIOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Plug and Play .................................................... 20
POST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Configuration/Setup Utility program ....................................... 21
Advanced Power Management (APM) ...................................... 21
Advanced Configuration and Power Interface ................................. 21
Flash update utility program ............................................ 21
Diagnostic program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Chapter 6. System compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Hardware compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Hardware interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Diskette drives and controller ......................................... 23
Hard disk drives and controller ........................................ 23
Software compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Software interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Machine-sensitive programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Appendix A. Connector pin assignments .................................. 25
Monitor connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Memory connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
PCI connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
IDE connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Diskette drive connector .............................................. 32
Power supply connector .............................................. 32
Modem/Ring Wakeup and Wake on LAN connectors ............................. 33
USB port connectors ................................................ 33
Mouse and keyboard port connectors ...................................... 33
Serial port connector ................................................ 34
Parallel port connector ............................................... 34
Appendix B. System address maps ..................................... 36
System memory map ............................................... 36
Input/output address map ............................................. 36
DMA I/O address map ............................................... 38
PCI configuration space map ........................................... 39
Appendix C. IRQ and DMA channel assignments ............................. 40
Appendix D. Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
POST error codes ................................................. 41
POST beep codes ................................................. 41
Appendix E. Notices and trademarks .................................... 42
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
iv Technical Information Manual

Figures
1. Memory configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Video subsystem resources ........................................ 6
3. Supported VGA video modes ....................................... 7
4. Supported Enhanced VGA video modes ................................. 7
5. Serial port assignments ........................................... 11
6. Parallel port assignments .......................................... 11
7. BIOS configuration jumper (J7A1) ..................................... 13
8. Power Input Requirements ......................................... 17
9. Power Output (145 Watt) .......................................... 17
10. System board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
11. Keyboard port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
12. Auxiliary device port ............................................. 18
13. PCI-bus adapters (Per Slot) either/or ................................... 18
14. USB port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
15. Internal DASD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
16. Video port pin 9 ............................................... 18
17. 3.5-inch diskette drive reading, writing, and formatting capabilities .................. 23
18. Monitor port connector pin assignments ................................. 25
19. System Memory Connector Pin Assignments .............................. 25
20. System memory connector pin input/output ............................... 27
21. PCI bus connector .............................................. 29
22. PCI connector pin assignments ...................................... 29
23. IDE connector pin assignments ...................................... 31
24. Diskette Drive Connector Pin Assignments ................................ 32
25. Power Supply Connector Pin Assignments ................................ 32
26. J13 Modem/Ring Wakeup Connector Pin Assignments ........................ 33
27. J22 Wake on LAN Connector Pin Assignments ............................. 33
28. USB Port Connector Pin Assignments .................................. 33
29. Mouse port connector pin assignments .................................. 33
30. Keyboard port connector pin assignments ................................ 34
31. Serial Port Connector Pin Assignments .................................. 34
32. Parallel port connector pin assignments ................................. 34
33. System memory map ............................................ 36
34. I/O address map ............................................... 36
35. DMA I/O address map ........................................... 38
36. IRQ channel assignments ......................................... 40
37. DMA channel assignments ......................................... 40
 Copyright IBM Corp. September 1999 v

Preface
This Technical Information Manual provides information for the IBM PC 300GL Types 6268, 6278, and
6288. It is intended for developers who want to provide hardware and software products to operate with
these IBM computers and provides an in-depth view of how these IBM computers work. Users of this
publication should have an understanding of computer architecture and programming concepts.
Related publications
In addition to this manual, the following IBM publications provide information related to the operation of the
IBM PC 300GL.
 PC 300GL User Guide
This publication contains information about configuring, operating, and maintaining the PC 300GL, as
well as installing new options in the PC 300GL. Also included are warranty information, instructions
for diagnosing and solving problems, and information on how to obtain help and service.
 Understanding Your Personal Computer
This online document includes general information about using computers and detailed information
about the features of the PC 300GL.
 About Your Software
This publication (provided only with computers that have IBM-preinstalled software) contains
information about the preinstalled software package.
 Hardware Maintenance Manual
This publication contains information for trained service technicians. It is available at
http://www.ibm.com/pc/us/cdt/hmm.html on the World Wide Web, and it can also be ordered from IBM.
To purchase a copy, refer to the "Getting Help, Service, and Information" section in PC 300GL User
Guide .
 Compatibility Report
This publication contains information about compatible hardware and software for the PC 300GL. It is
available at http://www.ibm.com/pc/us/cdt on the World Wide Web.
 Network Administrator's Guide
This publication contains information for network administrators who configure and service local area
networks (LANs). Look for this publication at http://www.ibm.com/pc/us/cdt on the World Wide Web.
Terminology usage
Attention: 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.
In this manual, some signals are represented in a small, all-capital-letter format (-ACK). A minus sign in
front of the signal indicates that the signal is active low. No sign in front of the signal indicates that the
signal is active high.
The use of the term hex 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 (2 30).
vi  Copyright IBM Corp. September 1999

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.
Note: Depending on the operating system and other system requirements, the storage capacity available
to the user might vary.
Preface vii

viii Technical Information Manual

Chapter 1. System overview
Chapter 1. System overview
PC 300GL Types 6268, 6278, and 6288 are computer systems designed to provide state-of-the-art
computing power with room for future growth.
Major features
The major features are:
An Intel Celeron microprocessor with MMX technology, with 128 KB L2 cache
Up to 512 MB of system memory
Integrated IDE bus master controller, ATA 66 capable
EIDE hard disk drive
System management
– Wake on LAN support
– DMI (Desktop Management Interface) BIOS and DMI software
– Integrated network protocols
– Enablement for remote administration
– Universal Management Agent (UMA) and UMA Plus
– Wake on Ring support
IDE CD-ROM1 drive, standard on some models
Asset security
– Security settings provided by the Configuration/Setup Utility program
- Power-on and administrator password protection
- Startup sequence control
- Hard disk drive and diskette drive access control
- I/O port control
– Cover lock loop
– U-bolt and security cabling (optional)
– Operating system security
– Diskette write-protection
– Alert on LAN support
Integrated video controller with 4 MB of video display cache memory
Integrated 16-bit, stereo Analog Devices, Inc. audio controller and built-in high quality speaker in all
models (supports SoundBlaster, DirectX, and Microsoft Windows Sound System applications)
Networking
– IBM 10/100 Mbits per second (Mbps), PCI Ethernet adapter with Wake on LAN in some models.
– IBM PCI token ring adapter with Wake on LAN is optional.
Expansion: Four drive bays, four PCI expansion slots
PCI I/O bus compatibility
EnergyStar compliance
1Variable read rate. Actual playback speed will vary and is often less than the maximum possible.
 Copyright IBM Corp. September 1999 1

Chapter 1. System overview
3.5-inch, 1.44 MB diskette drive
Input/output features
– One 25-pin, parallel port with Extended Capabilities Port (EPP)/Extended Parallel Port (EPP)
support
– Two 9-pin, Universal asynchronous receiver/transmitter (UART) serial ports
– Two 4-pin, Universal Serial Bus (USB) ports
– One 6-pin, keyboard port (PS/2 compatible)
– One 6-pin, mouse port
– One 15-pin, DDC2B-compliant monitor port
– Three 3.5 mm audio jacks (line/headphone out, line in, microphone)
Other features
The following features might be supported by the PC 300GL.
Network support
PC 300GL computers are enabled to support management over a network. The following is a list of
supported functions:
Selectable startup sequence
Selectable Automatic Power On Startup Sequence
Update POST/BIOS from network
Wake on LAN
CMOS Save/Restore utility program
CMOS setup over LAN
Wake on Ring
Wake on LAN
The power supply of the computer supports the Wake on LAN feature. With the Wake on LAN feature,
the computer can be turned on when a specific LAN frame is passed to the PC over the LAN.
To use the Wake on LAN feature, the computer must be equipped with a network adapter that supports
Wake on LAN. Some models come with a network adapter that supports Wake on LAN.
You can find the menu used for setting the Wake on LAN feature in the Configuration/Setup Utility
program.
Wake on Ring
All models are configurable to turn on the computer after a ring is detected from an external or internal
modem. The menu used for setting the Wake Up on Ring feature is found in the Configuration/Setup
Utility program. Two options control this feature:
Serial Ring Detect: Use this option if the computer has an external modem connected to serial port
1.
Modem Ring Detect: Use this option if the computer has an internal modem that supports the Wake
on Ring feature.
2Technical Information Manual