IBM PC 300GL Types 6275 Technical document

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
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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,
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 provides information for the IBM PC 300GL Types 6267, 6277, and
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.
 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 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.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 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.
 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 (2 10), 1 MB equals 1048576 bytes (2 20), and 1 GB equals 1073741824 bytes (2 30).
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.
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.
1Variable read rate. Actual playback speed will vary and is often less than the maximum possible.
 Copyright IBM Corp. November 1998 1

Chapter 1. System Overview
– 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.
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
2Technical 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
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
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 PC
300GL User Guide .)
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

Chapter 2. System-Board Features
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 Mem22
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
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
2Only in some Pentium II models
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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 PIIX4E bridge functions as a bus master for the IDE interface. The chip set is PCI 2.1
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.
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
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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:
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Chapter 2. System-Board Features
Figure 3. Supported VGA Video Modes
Mode
(hex) Display Mode Screen Resolution Colors Buffer Start (hex) Dot Clock
(MHz)
Sweep
Rate
(kHz)
Refresh
Rate
(Hz)
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
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 PC 300GL User Guide .
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.)
3An 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

Chapter 2. System-Board Features
The following connectors are available on the audio adapter or integrated audio controller:
 Joystick/MIDI (Musical Instrument Digital Interface) for connecting a game control or a musical device,
such as an electronic keyboard. This feature is available on some models only.
 Line Out port for connecting powered speakers. Your audio system requires a set of speakers
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 port for connecting Headphones. In general, any headphones designed for use with
personal computers can be used with your audio adapter.
 Microphone for connecting a 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
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
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Chapter 2. System-Board Features
The default setting for the serial port is COM1.
Parallel Port
Integrated in the system board is support for extended capabilities port (ECP), enhanced parallel port
(EPP), and standard parallel port (SPP) modes. The modes of operation are selected through the
Configuration/Setup Utility Program with the default mode set to SPP. The ECP and EPP modes are
compliant with IEEE 1284.
The following figure shows the parallel port assignments used in the configuration.
The default setting for the parallel port is Parallel 1.
The system board has one connector for the parallel port. For information on the connector pin
assignments, see “Parallel Port Connector” on page 39.
Keyboard and Mouse Ports
The keyboard and mouse subsystem is controlled by a general purpose 8-bit microcontroller; it is
compatible with 8042AH. The controller consists of 256 bytes of data memory and 2 KB of read-only
memory (ROM).
The controller has two logical devices: one controls the keyboard and the other controls the mouse. The
keyboard has two fixed I/O addresses and a fixed IRQ line and can operate without the mouse. The
mouse cannot operate without the keyboard because, although it has a fixed IRQ line, the mouse relies on
the addresses of the keyboard for operation. For the keyboard and mouse interfaces, no resource
assignments are given in the system memory addresses or 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).
The system board has one connector for the keyboard port and one connector for the mouse port. For
information on the connector pin assignments, see “Mouse and Keyboard Port Connectors” on page 38.
Network Connection
Some PC 300GL models are equipped with an Ethernet adapter that supports the Wake on LAN feature.
Features of the optional Ethernet adapter are:
Operates in shared 10BASE-T or 100BASE-TX environment
Transmits and receives data at 10 Mbps or 100 Mbps
Figure 4 (Page 2 of 2). Serial Port Assignments
Port Assignment Address Range (hex) IRQ Level
Serial 3 03E8–03FF IRQ4
Serial 4 02E8–02FF IRQ3
Figure 5. Parallel Port Assignments
Port Assignment Address Range (hex) IRQ Level
Parallel 1 03BC–03BE IRQ7
Parallel 2 0378–037F IRQ5
Parallel 3 0278–027F IRQ5
Chapter 2. System Board Features 11

Chapter 2. System-Board Features
RJ-45 connector for LAN attachment
Operates in symmetrical multiprocessing (SMP) environments
Wake on LAN support
Remote Program Load (RPL) and Dynamic Host Configuration Protocol (DHCP) support
Features of the optional token ring adapter are:
Transmits and receives data at 4 Mbps or 16 Mbps
RJ-45 and D-shell connectors for LAN attachment
Wake on LAN support
Remote Program Load (RPL) and Dynamic Host Configuration Protocol (DHCP) support
Real-Time Clock and CMOS
The real-time clock is a low-power clock that provides a time-of-day clock and a calendar. The clock
settings are maintained by an external battery source of 3 V DC.
The system uses 242 bytes of memory to store complementary metal-oxide semiconductor (CMOS)
memory. Moving a jumper on the system board erases CMOS memory.
To locate the battery, see “System Board, Types 6267, 6277, and 6287” on page 13.
Flash EEPROM
The system board uses a 2 MB flash electrically erasable, programmable, read-only memory (EEPROM)
to store the basic input/output system (BIOS), video BIOS, IBM logo, Configuration/Setup Utility, and Plug
and Play data.
If necessary, the EEPROM can be easily updated using a stand-alone utility program that is available on a
3.5-inch diskette.
Expansion Adapters
Each ISA expansion connector is a 16–bit slot, and each PCI-expansion connector is a 32–bit slot.
PCI-expansion connectors support the 32–bit 5 V DC, local-bus signalling environment that is defined in
PCI Local Bus Specification 2.1 . The ISA bus is buffered to provide sufficient drive for the ISA expansion
connectors, assuming two low-power Schottky (LS) loads per slot.
The PC 300GL has three PCI slots and one ISA slot to support the addition of adapters. For information
on installing adapters, see PC 300GL User Guide .
For information on the connector pin assignments, see “ISA Connectors” on page 32 and “PCI
Connectors” on page 34.
Figure 6. System Board Characteristics
Expansion Slots 4x4 System Board
Dedicated PCI 3
Dedicated ISA 1
12 Technical Information Manual