IBM ThinkPad 600 User Manual

Chapter 6. Resolving System Resource Conflicts
This chapter describes the default system resources and how to
share an IRQ between two devices.
Note: This chapter is only for Windows 95.
Sharing an IRQ between ThinkPad Modem Devices
...... 83
Default IRQ Assignments ...................... 86
System Resources and IRQs .................... 86
In most cases, your computer automatically assigns the system
resources when you install a new device. For example, your
computer assigns such resources as the
interrupt request (IRQ) level
and the input/output (I/O) ports when you install a PC Card modem.
Other devices might need such system resources as direct memory
access (DMA) and memory . The IRQ for each system resource can
have a value of 0 to 15. That is, there are 16 values that can be
assigned for IRQs.
Sometimes Windows 95 does not allocate the resources correctly,
because the resource might already be allocated to another device.
This is called a system resource
conflict , or contention . In this
case, you can free one IRQ by sharing an IRQ between two devices.
When doing this, you need to know about the system resources
available and their IRQs.
This chapter describes how to solve resource conflicts by sharing an
IRQ.
Sharing an IRQ between ThinkPad Modem Devices
The ThinkPad Modem function is supported by a digital signal
processor (DSP) called IBM Advanced Communications Processor.
The ThinkPad Modem usually uses two IRQs to handle the DSP
interrupt and the modem interrupt. However, by sharing an IRQ
between these two devices, you can free one IRQ so that you can
use it for another device.
Copyright IBM Corp. 1998 83

IBM ThinkPad 600 Specifications

General

Processor	Intel Pentium II
Graphics	Neomagic MagicGraph128XD
Operating System	Windows 95, Windows 98, or Windows NT 4.0
Resolution	800 x 600
Battery	Lithium-Ion
Optical Drive	Optional external CD-ROM drive
Ports	Serial, Parallel, VGA
Network	10/100 Ethernet
Clock Speed	233 MHz to 300 MHz
Display	12.1-inch TFT

Summary

Chapter 1. Using Your Computer Outside Your Home Country

Chapter 2. Using Audio and Modem Features

Using the Audio Features

Explains audio hardware and features like line-in, headphone jacks, and MIDI port.

Using the Modem Features

Describes data and facsimile modem functions supported by the ThinkPad modem.

Chapter 3. Protecting Your Computer

Using Passwords

Explains power-on, hard disk, and supervisor password features for security.

Chapter 4. Using Your Computer with a Battery Pack

Monitoring the Battery Status

Explains how to monitor battery status via indicator and program.

Saving Battery Power

Explains methods to conserve battery power for longer operation.

Using the Power Management Modes

Describes three modes to save battery power.

Customizing Power Management

Guides on how to customize power management settings.

Chapter 5. Using Your Computer with a PC Card

Using a PC Card

PC Card Types

Categorizes PC Cards by function (storage, modem, network, SCSI, other).

PC Card Support Software

Lists support software for various OSs: CardWorks, CardWizard, PC Card Director, CardSoft.

Using a PC Card in Windows 95 (with CardWorks)

Using a PC Card in Windows NT (with CardWizard)

Using a PC Card in Windows 3.11 (with CardWizard)

Chapter 6. Resolving System Resource Conflicts

Sharing an IRQ between ThinkPad Modem Devices

Explains how to free an IRQ by sharing it between modem devices.

Chapter 7. Solving Computer Problems

Frequently Asked Questions

Troubleshooting Guide

Offers a chart to find and solve problems based on symptoms.

Troubleshooting Charts

Lists various problem categories and their corresponding page numbers.

Chapter 8. Installing Software

Installing a New Operating System and Its Device Drivers

Guides on installing OS and corresponding device drivers for ThinkPad.

Installing Software for Windows 95

Details installation procedures for Windows 95 and its software.

Installing Microsoft Windows 95

Covers installation of Windows 95, including different versions.

Installing the ThinkPad Modem Software for Windows 95

Installing the ThinkPad Configuration Program for Windows 95

Steps to install the ThinkPad Configuration program for Windows 95.

Installing the ThinkPad Display Driver for Windows 95

Installing Software for Windows NT

Procedures for installing Windows NT Workstation 4.0 and its drivers.

Installing Microsoft Windows NT

Steps to install Microsoft Windows NT.

Installing the ThinkPad Configuration Program for Windows NT

Installing the ThinkPad Modem Software for Windows NT

Installing Software for Windows Version 3.11

Procedures for installing Windows Version 3.11 and its device drivers.

Installing Microsoft Windows Version 3.11

Guide to install Microsoft Windows Version 3.11.

Installing the ThinkPad Configuration Program for Windows 3.11