IBM PC 300GL, PC 300GL Type 6267, PC 300GL Type 6277, PC 300GL Type 6287 Technical Information Manual

Technical Information Manual

PC 300GL Types 6267, 6277, and 6287

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 46.

Preliminary Edition (November 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 November 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Terminology Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Chapter 1. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Major Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Other Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Wake on LAN .................................................. 2

Wake Up on Ring ................................................ 2

Network Enablement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Chapter 2. System Board Features ...................................... 4

Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Pentium II Microprocessor with MMX Technology ............................. 4

Celeron Microprocessor with MMX Technology ............................... 4

Chip Set Control .................................................. 5

L2 Cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

System Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

PCI Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

IDE Bus Master Interface ........................................... 7

PCI-to-ISA Bridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

USB Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Video Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Integrated AGP S3 Trio3D SVGA (Super Video Graphics Array) ..................... 8

Video Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Audio Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Input/Output Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Diskette Drive Interface ............................................. 10

Serial Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Parallel Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Keyboard and Mouse Ports .......................................... 11

Network Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Real-Time Clock and CMOS .......................................... 12

Flash EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Expansion Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Physical Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

System Board, Types 6267, 6277, and 6287 ................................ 13

System Board Switches .............................................. 13

Jumper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Connecting Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Connector Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Chapter 3. Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

PC 300GL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Cabling Requirements for Wake on LAN Adapters ............................. 17

Chapter 4. Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Power Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Component Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

 Copyright IBM Corp. November 1998 iii

Output Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Connector Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Chapter 5. System Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

BIOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Plug and Play .................................................... 21

POST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Configuration/Setup Utility Program ....................................... 22

Advanced Power Management (APM) ...................................... 22

Advanced Configuration and Power Interface (ACPI) ........................... 22

Flash Update Utility Program ........................................... 22

Diagnostic Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Universal Management Agent .......................................... 23

Chapter 6. System Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Hardware Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Hardware Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Diskette Drives and Controller ......................................... 25

Hard Disk Drives and Controller ........................................ 27

Software Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Software Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Machine-Sensitive Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Appendix A. Connector Pin Assignments .................................. 28

AGP Monitor Port Connector ........................................... 28

Memory Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

ISA Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

PCI Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

IDE Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Diskette Drive Connector ............................................. 36

Power Supply Connector ............................................. 37

Modem/Ring Wakeup and Wake on LAN Connectors ............................. 37

USB Port Connectors ............................................... 37

Mouse and Keyboard Port Connectors ..................................... 38

Serial Port Connector ............................................... 38

Parallel Port Connector .............................................. 39

Joystick/MIDI Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Appendix B. System Address Maps ..................................... 40

System Memory Map ............................................... 40

Input/Output Address Map ............................................ 40

DMA I/O Address Map ............................................... 42

PCI Configuration Space Map .......................................... 43

Appendix C. IRQ and DMA Channel Assignments ............................ 44

Appendix D. Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

POST Error Codes ................................................. 45

Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Appendix E. Notices and Trademarks .................................... 46

References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

iv Technical Information Manual

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Contents v

Figures

1. Memory Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2. Video Subsystem Resources ........................................ 8

3. Supported VGA Video Modes ....................................... 9

4. Serial Port Assignments .......................................... 10

5. Parallel Port Assignments ......................................... 11

6. System Board Characteristics ....................................... 12

7. Microprocessor Speed 66 MHz FSB (Switches 1-4) .......................... 13

8. Microprocessor Speed 100 MHz FSB (Switches 1-4) .......................... 14

9. ROM Recovery (Switch 5) ......................................... 14

10. Floppy Device Access (Switch 6) ..................................... 14

11. Clear CMOS Clear Jumper (J9) ...................................... 14

12. Power Input Requirements ......................................... 18

13. Power Output (145 Watt) .......................................... 18

14. System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

15. Keyboard Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

16. Auxiliary Device Port ............................................ 19

17. ISA-Bus Adapters (Per Slot) ........................................ 19

18. PCI-Bus Adapters (Per Slot) either/or ................................... 19

19. USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

20. Internal DASD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

21. Video Port Pin 9 ............................................... 20

22. 5.25-Inch Diskette Drive Reading, Writing, and Formatting Capabilities ............... 25

23. 3.5-Inch Diskette Drive Reading, Writing, and Formatting Capabilities ................ 25

24. AGP Monitor Port Connector Pin Assignments ............................. 28

25. System Memory Connector Pin Assignments .............................. 28

26. System Memory Connector Pin Input/Output .............................. 30

27. ISA Connector Pin Assignments ...................................... 32

28. PCI Bus Connector ............................................. 34

29. PCI Connector Pin Assignments ...................................... 34

30. IDE Connector Pin Assignments ...................................... 36

31. Diskette Drive Connector Pin Assignments ................................ 36

32. Power Supply Connector Pin Assignments ................................ 37

33. J13 Modem/Ring Wakeup Connector Pin Assignments ........................ 37

34. J22 Wake on LAN Connector Pin Assignments ............................. 37

35. USB Port Connector Pin Assignments .................................. 37

36. Mouse Port Connector Pin Assignments ................................. 38

37. Keyboard Port Connector Pin Assignments ............................... 38

38. Serial Port Connector Pin Assignments .................................. 38

39. Parallel Port Connector Pin Assignments ................................. 39

40. Joystick/MIDI Connector Pin Assignments ................................ 39

41. System Memory Map ............................................ 40

42. I/O Address Map ............................................... 40

43. DMA I/O Address Map ........................................... 42

44. IRQ Channel Assignments ......................................... 44

45. DMA Channel Assignments ........................................ 44

vi  Copyright IBM Corp. November 1998

Preface

This

Technical Information Manual

6287. 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. To order publications in the U.S. and Puerto Rico, call 1-800-879-2755. In other
countries, contact an IBM reseller or an IBM marketing representative.



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.

provides information for the IBM PC 300GL Types 6267, 6277, and



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.pc.ibm.com/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

Guide

.



Compatibility Report

This publication contains information about compatible hardware and software for the PC 300GL. It is
available at http://www.pc.ibm.com/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.pc.ibm.com/us/cdt on the World Wide Web.

Terminology Usage

Attention! The term

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.

reserved

describes certain signals, bits, and registers that should not be changed.

PC 300GL User

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.

 Copyright IBM Corp. November 1998 vii

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 (210), 1 MB equals 1048576 bytes (220), and 1 GB equals 1073741824 bytes (230).

When expressing storage capacity, MB equals 1 000 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.

viii Technical Information Manual

Chapter 1. System Overview

Chapter 1. System Overview

PC 300GL Types 6267, 6277, and 6287 are minitower systems designed to provide state-of-the-art
computing power with room for future growth.

Major Features

The major features are:

 An Intel Pentium II microprocessor with MMX technology and 100 MHz Front Side Bus (FSB), with

512 KB of L2 cache with ECC
Or

 An Intel Celeron microprocessor with MMX technology, with 128 KB L2 cache
 Up to 384 MB of system memory
 Integrated IDE bus master controller, Ultra DMA/33 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

 32X Max 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

 Integrated AGP S3 Trio3D SVGA video controller with 2 MB of SDRAM video memory (can be

upgraded to 4 MB) in some models and 4 MB of SDRAM video memory in other models

 Audio adapter (supports SoundBlaster, Adlib, and Microsoft Windows Sound System applications) is

optional in some models

 Integrated 16-bit, stereo ESS 1938 audio controller and built-in high quality speaker in some models

(supports SoundBlaster, Adlib, and Microsoft Windows Sound System applications)

 Networking

– IBM 10/100 Mbit, PCI Ethernet adapter with Wake on LAN in some models.

1

Variable read rate. Actual playback speed will vary and is often less than the maximum possible.

 Copyright IBM Corp. November 1998

1

– IBM PCI token ring adapter with Wake on LAN is optional.

 Expansion

– Four drive bays, four expansion slots (one ISA, three PCI)

 ISA/PCI I/O-bus compatibility
 Industry-standard compatibility
 EnergyStar compliance

 3.5-inch, 1.44 MB diskette drive
 Input/Output Features

– One 25-pin, ECP/EPP parallel port
– Two 9-pin, UART serial ports
– Two 4-pin, USB ports
– One 6-pin, keyboard port (Windows 95-compatible)
– One 6-pin, mouse port
– One 15-pin, DDC2B-compliant monitor port
– Three 3.5 mm audio jacks (line out, headphone, microphone) on models with integrated sound

system.

Chapter 1. System Overview

Other Features

The following features may be supported by the PC 300GL.

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 subsystem that supports
Wake on LAN.

The menu used for setting the Wake on LAN feature is found in the Configuration/Setup Utility Program.

Wake Up 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 the serial

port.

 Modem Ring Detect: Use this option if the computer has an internal modem.

Network Enablement

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

2 Technical Information Manual

Chapter 1. System Overview

 CMOS Save/Restore utility program
 CMOS setup over LAN
 Wake Up on Ring

Chapter 1. System Overview 3

Chapter 2. System Board Features

This section includes information about system-board features. For an illustration of the system board,
see “System Board, Types 6267, 6277, and 6287” on page 13.

Microprocessor

PC 300GL Types 6267, 6277, and 6287 comes with an Intel Pentium II microprocessor with MMX
technology or an Intel Celeron microprocessor. The microprocessor, which has a heat sink attached,
plugs directly into a connector on the system board.

Pentium II Microprocessor with MMX Technology

The features of this microprocessor are as follows:

 Optimization for 32-bit software

 Operation at a lower voltage level than previous microprocessors

 64-bit microprocessor data bus

 100 MHz FSB

 512 KB L2 cache with ECC

 32-bit microprocessor address bus
 Math coprocessor

 MMX technology, which boosts the processing of graphic, video, and audio data

 L2 cache integrated into the microprocessor

 Cache operates at 1/2 processor core speed

– 4-way set associative

– Nonblocking

Chapter 2. System-Board Features

More information on these microprocessors is available at http://www.intel.com on the World Wide Web.

Celeron Microprocessor with MMX Technology

The features of this microprocessor are as follows:

 Optimization for 32-bit software

 Operation at a lower voltage level than previous microprocessors

 64-bit microprocessor data bus

 66 MHz FSB

 128 KB L2 cache

 32-bit microprocessor address bus
 Math coprocessor

 MMX technology, which boosts the processing of graphic, video, and audio data

 L2 cache integrated into the microprocessor

 Cache operates at processor core speed

– 4-way set associative

– Nonblocking

4  Copyright IBM Corp. November 1998

Chapter 2. System-Board Features

Chip Set Control

Two components, the Intel 440BX and PIIX4E, make up the chip set that is the interface between the
microprocessor and the following:

 Memory subsystem
 PCI bus

 IDE Bus Master connection
 High-performance, PCI-to-ISA bridge

 USB ports
 SMBus

 Enhanced DMA controller

L2 Cache

The Pentium II microprocessor with MMX technology provides 512 KB of L2 cache with ECC. The
Celeron microprocessor provides 128 KB L2 cache. The L2 cache ECC function is automatically enabled
when ECC memory is installed. If nonparity memory is installed, the L2 cache ECC is disabled. (For
information on overriding these settings, refer to Chapter 5, Configuration/Setup Utility Program, in

300GL User Guide

.)

PC

System Memory

The system memory interface is controlled by the 440BX chip set. Synchronous dynamic random access
memory (SDRAM) is standard.

The maximum amount of system memory is 384 MB on some models and 256 MB on some models. For
memory expansion, some system board models provide three dual inline memory module (DIMM)
connectors. Other models provide two DIMM connectors. 100 MHz DIMMs in sizes of 16 MB, 32 MB, 64
MB, and 128 MB are supported. The amount of memory preinstalled varies by model.

The following information applies to system memory:

 SDRAM (synchronous dynamic random access memory), nonparity memory is standard.
 Error correcting code (ECC) is supported in Pentium II models
 The maximum height of memory modules is 3.18 cm (1.25 in.).
 Only PC 100 industry-standard, gold-lead DIMMs are supported.
 A mix of ECC and nonparity types configures as nonparity.

For information on the pin assignments for the memory module connectors, see “Memory Connectors” on
page 28.

Chapter 2. System Board Features 5

The following figure shows some possible configurations for the supported DIMMs.
Note: Values in the following table are represented in megabytes (MB).

Figure 1. Memory Configurations

Total Memory (MB) Mem 0 Mem 1 Mem2

16 16 0 0
32 16 16 0
32 32 0 0
48 16 16 16
48 32 16 0
64 32 16 16
64 32 32 0
64 64 0 0
96 32 32 32

96 64 32 0
128 64 32 32
128 64 64 0
128 128 0 0
160 32 64 64
192 64 64 64
224 32 64 128
256 128 64 64
256 128 128 0
288 32 128 128
384 128 128 128

Chapter 2. System-Board Features

2

PCI Bus

The fully synchronous 33 MHz PCI bus originates in the chip set. Features of the PCI bus are:

 Integrated arbiter with multitransaction PCI arbitration acceleration hooks
 Zero-wait-state, microprocessor-to-PCI write interface for high performance graphics
 Built-in PCI bus arbiter with support for up to five masters
 Microprocessor-to-PCI memory write posting with 5-Dword-deep buffers
 Converts back-to-back sequential microprocessor-to-PCI memory write to PCI burst write
 PCI-to-DRAM posting 18 Dwords
 PCI-to-DRAM up to 100+ MB/sec bandwidth
 Multitransaction timer to support multiple short PCI transactions within one PCI ARB cycle
 PCI 2.1 compliant

 Delayed transaction

 PCI parity checking and generation support

2

Only in some Pentium II models

6 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

Extensions

The Intel PIIX4E bridge functions as a
compliant. It connects directly to the PCI bus and is designed to allow concurrent operations on the PCI
bus and IDE bus. The chip set is capable of supporting PIO mode 0–4 devices and IDE DMA mode 0–2
devices, Ultra DMA 33 transfers up to 33 Mbytes/sec.

The IDE devices receive their power through a four-position power cable containing +5, +12, and ground
voltage. When adding devices to the IDE interface, one device is designated as the master device and
another is designated as the slave or subordinate device. These designations are determined by switches
or jumpers on each device. There are two IDE ports, one designated 'Primary' and the other 'Secondary,'
allowing for up to four devices to be attached. The total number of physical IDE devices is dependent on
the mechanical package.

For the IDE interface, no resource assignments are given in the system memory or the direct memory
access (DMA) channels. For information on the resource assignments, see “Input/Output Address Map”
on page 40 and Figure 44 on page 44 (for IRQ assignments).

Two connectors are provided on the riser for the IDE interface. For information on the connector pin
assignments, see “IDE Connectors” on page 35.

.

bus master

for the IDE interface. The chip set is PCI 2.1

AT Attachment Interface with

PCI-to-ISA Bridge

On the system board, the Intel PIIX4E bridge provides the interface between the peripheral component
interface (PCI) and industry standard architecture (ISA) buses. The chip set is used to convert PCI bus
cycles to ISA bus cycles; the chip set also includes all the subsystems of the ISA bus, including two
cascaded interrupt controllers, two DMA controllers with four 8-bit and three 16-bit channels, three
counters equivalent to a programmable interval timer, and power management. The PCI bus operates at
33 MHz. The ISA bus operates at 8.25 MHz.

For the ISA bus, no resource assignments are given in the system memory or the DMA channels. For
information on resource assignments, see “Input/Output Address Map” on page 40 and Figure 44 on
page 44 (for IRQ assignments).

USB Interface

Universal serial bus (USB) technology is a standard feature of the computer. Using the chip set, the
system board provides the USB interface with two connectors. A USB-enabled device can attach to each
connector, and if that device is a hub, multiple peripherals can attach to the hub and be used by the
system. The USB connectors use Plug and Play technology for installed devices. The speed of the USB
is up to 12 MB/sec with a maximum of 127 peripherals. The USB is compliant with Universal Host
Controller Interface Guide 1.0.

Features provided by USB technology include:

 Support for hot-pluggable devices
 Support for concurrent operation of multiple devices
 Suitable for different device bandwidths
 Support for up to five meters length from host to hub or from hub to hub
 Guaranteed bandwidth and low latencies appropriate for specific devices
 Wide range of packet sizes

Chapter 2. System Board Features 7

Chapter 2. System-Board Features

 Limited power to hubs

For information on the connector pin assignments for the USB interface, see “USB Port Connectors” on
page 37.

Video Subsystem

The video subsystem on the system board includes the Integrated AGP S3 Trio3D SVGA (super video
graphics array) controller. The system board supports up to two SGRAM memory modules. Each module
contains 2 MB of SGRAM memory.

Integrated AGP S3 Trio3D SVGA (Super Video Graphics Array)

The Integrated AGP S3 Trio3D SVGA (super video graphics array) supports all video graphics array
(VGA) modes and is compliant with super video graphics array (SVGA) modes and Video Electronics
Standards Association (VESA) 1.2. Some enhanced features are:

 Plug and Play support
 100 MHz SGRAM support
 Advanced Power Management support
 Color space conversion

 Hardware scaling
The PC 300GL has an AGP bus and is AGP 1.0 compliant. The S3 Trio3D video subsystem supports the

VESA Display Data Channel (DDC) standard 1.1 and uses DDC1 and DDC2B to determine optimal values
during automatic monitor detection.

The video subsystem has the following resource assignments:

Figure 2. Video Subsystem Resources

Resource Assignment

ROM (hex) C0000–C7FFF (32KB)
RAM (hex) A0000–BFFFF
I/O (hex) VGA, Sequencer, CRT controller, graphics controller, attribute, RAMDAC, extended sequencer, extended

CRTC Registers
IRQ PCI interrupt #2 (automatically assigned to ISA IRQ 9 by POST or can be disabled in Setup Utility)
DMA None

For further information on resource assignments, see Appendix B, “System Address Maps” on page 40
and Appendix C, “IRQ and DMA Channel Assignments” on page 44.

The PC 300GL supports the following video subsystem modes:

8 Technical Information Manual

Chapter 2. System-Board Features

Figure 3. Supported VGA Video Modes

Mode
(hex)

00 Text 40 x 25 characters 2 B8000 28.322 31.5 70
01 Text 40 x 25 characters 16 B8000 28.322 31.5 70
02 Text 80 x 25 characters B/W B8000 28.322 31.5 70

03 Text 80 x 25 characters 16 B8000 28.322 31.5 70

04 Graphics 320 x 200 pixels 4 B8000 25.175 31.5 70
05 Graphics 320 x 200 pixels 4 B8000 25.175 31.5 70
06 Text 640 x 200 pixels 2 B8000 25.175 31.5 70
07 Text 80 x 25 characters Mono B0000 28.322 31.5 70
0D Graphics 320 x 200 pixels 16 A0000 25.175 31.5 70
0E Graphics 640 x 200 pixels 16 A0000 25.175 31.5 70
0F Graphics 640 x 350 pixels Mono A0000 25.175 31.5 70
10 Graphics 640 x 350 pixels 16 A0000 25.175 31.5 70
11 Graphics 640 x 480 pixels 2 A0000 25.175 31.5 60
12 Graphics 640 x 480 pixels 16 A0000 25.175 31.5 60
13 Graphics 320 x 200 pixels 256 A0000 25.175 31.5 70

Display
Mode

Screen Resolution Colors Buffer Start

(hex)

Dot
Clock
(MHz)

Sweep
Rate
(kHz)

Refresh
Rate
(Hz)

The video subsystem provides a 15-pin monitor connector on the system board. For information on
connector pin assignments, see “AGP Monitor Port Connector” on page 28.

Video Memory

The video memory interface is controlled by an S3 Trio3D graphics controller. Some models are shipped
with 4 MB SGRAM with the video subsystem, other models are shipped with 2MB SGRAM.

The video memory is 2 MB 256K X32 socket with 100MHz SGRAM. The video memory can be upgraded
from 2 MB SGRAM to 4 MB SGRAM with a 2 MB SGRAM 100 MHz SODIMM. The SODIMM can be
plugged into the SODIMM socket on the system board. For details, see

Audio Subsystem

Some PC 300GL models come with an ESS 1938 integrated audio controller. These models, which are
capable of playing and recording sounds, support SoundBlaster, Adlib, and Microsoft Windows Sound
System applications.

The device drivers for the preinstalled audio adapter are on the hard disk drive. The device drivers are
also available on the

Software Selections

CD provided with all models.

If you connect an optional device to the audio adapter, follow the instructions provided by the
manufacturer. (Note that device drivers might be required. If necessary, contact the manufacturer for
information on these device drivers.)

PC 300GL User Guide

.

3

An electronic device connected to the joystick/MIDI connector might require an optional adapter cable. For more information, refer
to the documentation that comes with the electronic device.

Chapter 2. System Board Features

9

The following connectors are available on the audio adapter or integrated audio controller:



Joystick/MIDI (Musical Instrument Digital Interface)

such as an electronic keyboard. This feature is available on some models only.



Line Out

connected to the Line Out port in order to hear audio from the adapter. These speakers must be
powered with a built-in amplifier. In general, any powered speakers designed for use with personal
computers can be used with your audio adapter. These speakers are available with a wide range of
features and power outputs.



Headphone

personal computers can be used with your audio adapter.



Microphone

Input/Output Controller

Control of the integrated input/output (I/O) and diskette drive controllers is provided by a single module,
the SMC 37C673. This module, which supports Plug and Play, controls the following features:

 Diskette drive interface
 Serial port
 Parallel port

 Keyboard and mouse ports

 General purpose I/O ports

port for connecting powered speakers. Your audio system requires a set of speakers

port for connecting Headphones. In general, any headphones designed for use with

for connecting a microphone.

for connecting a game control or a musical device,

Chapter 2. System-Board Features

Diskette Drive Interface

The PC 300GL has four drive bays for installing internal devices. The following is a list of devices that the
diskette drive subsystem supports:

 1.44 MB, 3.5 inch diskette drive

 1.44 MB, 3.5 inch, 3-mode drive for Japan (no BIOS support for 3-mode drive)

 1.2 MB, 5.25 inch diskette drive

 1 Mbps, 500 Kbps, or 250 Kbps internal tape drive

One connector is provided on the system board for diskette drive support. For information on the
connector pin assignments, see “Diskette Drive Connector” on page 36.

Serial Ports

One universal asynchronous receiver/transmitter (UART) serial port is integrated into the system board.
The serial port includes a 16-byte data, first-in first-out (FIFO) buffer, and has programmable baud rate
generators. The serial port is NS16450 and PC16550A compatible.

For information on the connector pin assignments, see “Serial Port Connector” on page 38.
Note: Current loop interface is not supported.
The following figure shows the serial port assignments in the configuration.

Figure 4 (Page 1 of 2). Serial Port Assignments

Port Assignment Address Range (hex) IRQ Level

Serial 1 03F8–03FF IRQ4
Serial 2 02F8–02FF IRQ3

10 Technical Information Manual