# LAN Adapter and Protocol Support
IBM Product Overview

## Table of Contents

- About This Publication
- 1.0 NDIS Overview
- 2.0 LAN Adapter and Protocol Support Overview
- 3.0 IBM OS/2 LAN Server Version 2.0
- 3.1 Adapter Support for IBM OS/2 LAN Server Version 2.0
- 4.0 IBM Extended Services for OS/2
- 4.1 Adapter support for IBM Extended Services for OS/2
- 5.0 IBM LAN Enabler Version 2.0
- 5.1 Description
- 5.2 Adapter Support for IBM LAN Enabler Version 2.0
- 6.0 IBM TCP/IP for OS/2 V 1.2.1
- 6.1 Description
- 6.2 Adapter Support for TCP/IP for OS/2
- 7.0 DOS LAN Support Program
- 8.0 LAN Products Requiring DOS LAN Support Program
- 8.1 OS/2 Products
- 8.2 DOS Products
- 9.0 NDIS Network Driver Enablement Process
- 9.1 IBM Testing Overview
- 9.2 NDIS MAC Driver Enablement Overview
- 9.3 NDIS Driver Enablement Offering
  - 9.3.1 DWB Functional Verification Test
  - 9.3.2 National Software Testing Laboratories Compatibility Test
  - 9.3.3 IBM Complementary Delivery of OEM NDIS MAC Drivers
    - 9.3.3.1 Prerequisites for Distribution
    - 9.3.3.2 NDIS Driver Availability For Customers
  - 9.3.4 National Language Support
- Notices
  - Copyrights
  - Disclaimers
  - Trademarks

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## About This Publication

The network Driver Interface Specification (NDIS) developed jointly by 3Com** and Microsoft** is a standardized interface for network adapter drivers and protocol drivers. This publication describes the implementation of NDIS support in IBM LAN products. In particular this publication describes the implementation of LAN Adapter and Protocol Support in OS/2 based products and LAN Support Program in DOS based products. As of this printing, LAN Adapter and Protocol Support (LAPS) is available in Extended Services for OS/2, LAN Server 2.0, TCP/IP for OS/2 1.2.1, LAN Enabler 2.0, LAN Server 3.0, and Network Transport Services/2 (NTS/2) Version 1.0. This publication has been updated to reflect changes made to LAPS in LAN Server 3.0 and NTS/2.

This document also provides an overview of the LAN adapter enablement process for NDIS network drivers, also known as NDIS media access control (MAC) drivers. This process is for supporting OEM and IBM NDIS network drivers during phases of development, testing, and distribution to end users.

Related Publications

- IBM Network Transport Services/2 LAN Adapter and Protocol Support Configuration Guide
- IBM OS/2 LAN Server Version 3.0 Network Administrator Reference Volume 1: Planning and Installation
- IBM OS/2 LAN Server Version 3.0 Network Administrator Reference Volume 2: Performance Tuning Guide
- IBM OS/2 LAN Server Version 3.0 Application Programmer's Reference
- IBM Extended Services for OS/2 Network Administration Guide
- IBM Extended Services for OS/2 Communications Manager Configuration Guide
- IBM Extended Services for OS/2 LAN Adapter and Protocol Support Configuration Guide
- IBM OS/2 LAN Server Version 2.0 Network Administrator Reference Volume 1: Planning and Installation
- IBM OS/2 LAN Server Version 2.0 Network Administrator Reference Volume 2: Performance Tuning
- IBM OS/2 LAN Server Version 2.0 Network Administrator Reference Supplement for OS/2 2.0
- IBM Local Area Network Technical Reference
- TCP/IP for OS/2: LAPS Introduction and Configuration Guide
- 3Com/Microsoft LAN Manager Network Driver Interface Specification Version 2.0.1 Final
- NDIS Implementation Information for IBM LAN Systems, Extended NIF Format
- NDIS Implementation Information for IBM LAN Systems, NDIS Extensions
- NDIS implementation Information for IBM LAN Systems, OS/2 Messaging and National Language Support
- NDIS Implementation Information for IBM LAN Systems, IBM OS/2 LAN Technical Reference Extensions

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## 1.0 NDIS Overview

The Network Driver Interface Specification (NDIS) developed jointly by 3Com** and Microsoft** is a standardized interface for network adapter drivers and protocol drivers. NDIS separates protocol handling from hardware manipulation by defining functions that protocol drivers and network adapter drivers must provide to each other. It defines a configuration and binding process, which is handled by the protocol manager. NDIS has become an accepted industry standard, providing a common, open interface that enables different manufacturers of network adapters and LAN software to communicate. Figure 1 illustrates the major software components in the NDIS environment.

A network adapter driver provides the communication between a network adapter and a protocol. The main function of the network adapter driver is to support network packet reception and transmission. A protocol driver provides the communication between an application and a network adapter driver. The main function of the protocol manager is to read configuration information from the configuration file, PROTOCOL.INI, and make it available to the network adapter drivers and protocol drivers. It also coordinates connections between protocol drivers and network adapter drivers. Before the protocol driver and the network adapter driver can communicate, they must be bound together (entry points are exchanged). NETBIND initiates the binding process based on information in PROTOCOL.INI.

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## 2.0 LAN Adapter and Protocol Support Overview

LAN Adapter and Protocol Support is network communication software that consists of NDIS-compliant protocol drivers, NDIS-compliant network adapter drivers, API support software, and configuration and installation software for these drivers. LAN Adapter and Protocol Support is the network communication software necessary to support the LAN connectivity for OS/2 LAN products, and is a subsystem in IBM Extended Services for OS/2, IBM OS/2 LAN Server Version 2.0, and IBM LAN Enabler Version 2.0. A version of LAN Adapter and Protocol Support that contains only a TCP/IP protocol stack is included in TCP/IP for OS/2 1.2.1. A later release of LAN Adapter and Protocol Support is included in LAN Server 3.0 and NTS/2.

IEEE 802.2 and NETBIOS are the protocol drivers available with LAN Adapter and Protocol Support. A device driver interface API and a dynamic link interface API exist for both protocols. The IEEE 802.2 and NETBIOS APIs and the IEEE 802.2 and NETBIOS protocols are described in detail in the IBM Local Area Network Technical Reference. Refer to the NDIS Implementation Information for IBM LAN Systems OS/2 LAN Technical Reference Extensions for a list of network adapters supported by LAN Adapter and Protocol Support. The chapter on NDIS Driver Enablement Process in this document describes how to assist new driver support for OS/2 products to develop, test and distribute.

NDIS allows multiple protocols to bind to the same network adapter driver. Therefore, both the NETBIOS and 802.2 protocol drivers can bind to the same network adapter driver. Figure 2 shows the relationship between LAN adapters, network adapter drivers, protocol drivers, and applications.

In addition to the OS/2 API support, LAN Adapter and Protocol Support provides OS/2 2.0 Manual LAN Support. This will enable existing DOS NETBIOS and IEEE 802.2 applications running in the OS/2 2.0 Virtual DOS Machine environment to share an adapter with other DOS, OS/2 NETBIOS, and IEEE 802/2 applications running on the same machine.

Configuration parameters for LAN Adapter and Protocol Support network adapter drivers and protocol drivers exist in the file PROTOCOL.INI, which also contain the binding information for each driver. For a detailed explanation of configuration parameters and PROTOCOL.INI see the Extended Services Communications Manager Configuration Guide, or the Extended Services LAN Adapter and Protocol Support Configuration Guide, or the OS/2 LAN Server Network Administrator Reference Volume 2: Performance Tuning. For the LAN Server 3.0 and NTS/2 release of LAN Adapter and Protocol Support, see the LAN Adapter and Protocol Support Configuration Guide for a detailed explanation of configuration parameters and PROTOCOL.INI. The network information file (NIF) supports the user interface in providing network driver information to the PROTOCOL.INI.

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## 3.0 IBM OS/2 LAN Server Version 2.0

IBM OS/2 LAN Server Version 2.0 Entry supports either 16-bit or 32-bit operating systems, provides enhancements over the previous IBM LAN Server in the areas of system management, double byte character set (DBCS) support for DOS LAN Requester, Windows 3.0 support, and OEM (PCM) enabling. The entry product is designed for customers specializing in workgroup computing.

The LAN requesters distributed feature is offered to enable DOS and OS/2 workstations to access the OS/2 LAN Server in a client/server relationship. The function offered in the Distributed Feature is a subset of that provided by IBM OS/2 LAN Server Version 2.0.

In addition to the function described above, excluding 32-bit operating system support, IBM OS/2 LAN Server 2.0 Advanced provides additional performance enhancements by exploiting advanced functions of the Intel 386 architecture. Also provided are disk mirroring duplexing and local server security. These functions allow the IBM OS/2 LAN Server Version 2.0 Advanced to support customers with critical applications requiring higher performance and enhanced data integrity.

IBM OS/2 LAN Server Version 2.0 has the same APIs as well as most of the same functions as Microsoft's LAN Manager 2.0. By providing unique features, IBM OS/2 LAN Server Version 2.0 achieves competitive advantage in many marketing situations.

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### 3.1 Adapter Support for IBM OS/2 LAN Server Version 2.0

LAN Adapter and Protocol Support is packaged as a subsystem of IBM OS/2 LAN Server Version 2.0. IBM OS/2 LAN Server Version 2.0 runs as an application written to the NETBIOS and 802.2 protocol driver APIs. Therefore, any NDIS network driver written and tested on LAN Adapter and Protocol Support should qualify for testing under IBM OS/2 LAN Server Version 2.0. IBM OS/2 LAN Server Version 2.0 contains a suite of IBM-tested NDIS network drivers. IBM also provides an enablement process whereby IBM and OEM owners of adapters for which drivers were not provided in the original suite, can develop, test and distribute them.

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## 4.0 IBM Extended Services for OS/2

Two new IBM program products provide database and communications function for OS/2 programs. Both programs also contain database administration tools, Query Manager, and enhanced communications support for local area network (LAN) and standalone workstations. The two programs are:

- IBM Extended Services with Database Server for OS/2
- IBM Extended Services for OS/2

Associated only with IBM Extended Services with Database Server for OS/2 program, is a distributed feature called Database Client Application Enablers. This feature enables DOS, Windows, and OS/2 clients to access Extended Services database servers on a LAN. This same client support can provide read and write access to IBM host servers supporting Distributed Relational Database Architecture (DRDA). The IBM Extended Services for OS/2 program includes DOS, Windows, and OS/2 client support similar to that in the distributed feature.

IBM Extended Services for OS/2 is designed to run on the IBM OS/2 Standard Edition Version 1.3 (Refresh Level 1.30.1) or to replace the communications and database manager functions of the IBM Extended Edition Version 1.3 when upgrading to Refresh Level 1.30.1. IBM Extended Services for OS/2 will also run on the IBM OS/2 2.0 32-bit operating system.

IBM Extended Services for OS/2 includes many function, performance and usability enhancements to the database and communications applications previously available on the IBM Extended Edition Version 1.3. The base OS/2 operating system, previously part of the Extended Edition Database and Communication Manager components, is now a separately packaged program. The LAN Requester is now provided with IBM OS/2 LAN Server Version 2.0.

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### 4.1 Adapter support for IBM Extended Services for OS/2

LAN Adapter and Protocol Support is packaged as a subsystem within IBM Extended Services for OS/2. IBM Extended Services for OS/2 runs as an application written to the NETBIOS and 802.2 protocol driver APIs. Therefore any NDIS network driver written and tested on LAN Adapter and Protocol Support should qualify for testing under IBM Extended Services for OS/2. IBM Extended Services for OS/2 contains a suite of IBM-tested NDIS network drivers. IBM also provides an enablement process whereby IBM and OEM owners adapters for which drivers were not provided in the original suite, can develop, test and distribute them.

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## 5.0 IBM LAN Enabler Version 2.0

IBM LAN Enabler Version 2.0 offers the OS/2 Requester (both 286 and 386), LAN Support Program 1.2, and DOS LAN Requester (DLR) in a separate program package for a uses of OS/2 LAN Server 2.0 and OEM servers.

The IBM LAN Enabler Version 2.0 is a repackaging of the OS/2 and DOS requesters in the IBM OS/2 LAN Server Version 2.0 product. This program is for customers who want requesters only for a LAN server or for customers who want to use LAN Adapter and Protocol Support without requiring IBM Extended Services for OS/2 or IBM OS/2 LAN Server Version 2.0.

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### 5.1 Description

The OS/2 LAN Requester consists of two components, the LAN Adapter and Protocol Support and the requester code. LAN Adapter and Protocol Support contains NETBIOS virtual device driver (VDD) support which allows DOS NETBIOS applications running in an OS/2 virtual DOS machine (VDM) environment to share an adapter with other DOS, DOS Windows, and OS/2 NETBIOS applications.

The DOS LAN Requester consists of two components also, the DOS LAN Support Program, which is roughly the DOS equivalent to LAN Adapter and Protocol Support, and the requester code.

On an OS/2 workstation, a customer can choose to configure LAN Adapter and Protocol Support only or LAN Adapter and Protocol Support along with the OS/2 requester code. The customer who installs LAN Adapter and Protocol Support only has an application need requiring OS/2 LAN connectivity, but without requiring either IBM Extended Services for OS/2 or IBM OS/2 LAN Server Version 2.0. The customer who installs the requester with LAN Adapter and Protocol Support does not require IBM OS/2 LAN Server Version 2.0 as a prerequisite for the requester code.

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### 5.2 Adapter Support for IBM LAN Enabler Version 2.0

LAN Adapter and Protocol Support is packaged as a subsystem of IBM LAN Enabler Version 2.0. IBM LAN Enabler Version 2.0 runs as an application written to the NETBIOS and 802.2 protocol driver APIs. Therefore, any NDIS network driver written and tested on LAN Adapter and Protocol Support should qualify for testing under IBM LAN Enabler Version 2.0. IBM LAN Enabler Version 2.0 contains a suite of IBM-tested NDIS network drivers. IBM also provides an enablement process whereby IBM and OEM owners of adapters for which drivers were not provided in the original suite, can develop, test and distribute them.

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## 6.0 IBM TCP/IP for OS/2 V 1.2.1

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### 6.1 Description

IBM TCP/IP for OS/2 supports a full suite of TCP/IP protocols and applications on OS/2. Applications include TCP, IP, UDP, ARP, ICMP, RIP, TELNET, FTP, TFTP, SMTP, SNMP, NFS, X Windows, NETSTAT, RIP and PING among others. Both IEEE 802.3 and Ethernet V2 (DIX) are supported on Ethernet LANs. FDDI, Token-Ring X.25, and SLIP support is also available.

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### 6.2 Adapter Support for TCP/IP for OS/2

LAN Adapter and Protocol Support is packaged as a subsystem of TCP/IP for OS/2. Therefore, any NDIS network driver written and tested on LAN Adapter and Protocol Support should qualify for testing under TCP/IP for OS/2. TCP/IP for OS/2 contains a suite of IBM-tested NDIS network drivers. IBM also provides an enablement process whereby IBM and OEM owners of adapters for which drivers were not provided in the original suite, can develop, test and distribute them.

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## 7.0 DOS LAN Support Program

The IBM LAN Support Program (LSP) is a DOS program product that provides network communication software for DOS workstation attachment to the local area network (LAN). In the NDIS environment LSP provides protocol Support for Ethernet (IEEE 802.3 and DIX Version 2.0) and IEEE 802.5. LSP also provides native mode (non-NDIS) Support for access to IBM PC Network and IBM Token-Ring networks.

The IEEE 802.2 and NETBIOS interfaces are contained in LSP allowing LAN applications to provide end to end connectivity. LSP also contains an interrupt arbitrator module which provides management of the '5C'X interrupt used to access the IEEE 802.2 and NETBIOS interfaces. The following figure shows the LSP structure including interfaces and modules.

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## 8.0 LAN Products Requiring DOS LAN Support Program

The LAN Support Program provides support for applications that are written to the NETBIOS and IEEE 802.2 programming interfaces. Examples of applications written to these interfaces are server code, requester/client code, and terminal emulation code. The following sections list applications that have been tested to work with LAN Support Program.

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### 8.1 OS/2 Products

- IBM DOS Database Requester packaged with IBM OS/2 Extended Edition 1.3
- IBM DOS Database Requester packaged with IBM Extended Services for OS/2
- IBM DOS LAN Requester packaged with the IBM OS/2 LAN Server 1.3, 2.0 and 3.0
- IBM DOS LAN Requester packaged with IBM LAN Enabler Version 2.0

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### 8.2 DOS Products

- IBM PC LAN Program 1.3
- IBM Personal Communications/3270
- IBM Applications System/400 PC Support

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## 9.0 NDIS Network Driver Enablement Process

The Network Driver Interface Specification (NDIS) network driver enablement process supports the development, testing, and distribution of NDIS media access control (MAC) drivers on IBM of products for OEM vendors.

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### 9.1 IBM Testing Overview

This section describes the testing procedures followed by IBM in generating NDIS MAC drivers. The development and testing are divided into three broad parts.

- The development phase consists of programming the NDIS MAC drivers and taking that code successfully through unit test.
- Functional verification consists of running a suite of test cases on the MAC driver running under the NETBIOS and IEEE 802.2 protocol drivers provided by LAN Adapter and Protocol Support. In addition an NDIS interface test can be performed using an IBM test tool which tests the NDIS verbs and parameters on the MAC driver.
- Product verification test consists of testing the MAC driver with a variety of other connectivities using Extended Services and LAN Server. This test optimizes a simulated real life scenario.

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### 9.2 NDIS MAC Driver Enablement Overview

To encourage the development of NDIS MAC drivers of OEM adapters for IBM products, IBM and two independent testing agents will offer enablement tools and testing that is similar to the test strategy IBM uses.

Two independent testing agents provide test offerings for a fee. DWB Associates, Inc. provides functional verification testing, the NDIS interface test or the MAC driver function test under the IEEE 802.2 and NETBIOS protocol drivers in LAN Adapter and Protocol Support. National Software Testing Laboratories Inc. (NSTL), provides compatibility testing of IBM OS/2 LAN Server and IBM Extended Services for OS/2 under IBM OS/2 32-bit and 16-bit operating systems.

OEM NDIS MAC Drivers that have passed NSTL compatibility test and are accompanied by a signed agreement with IBM will be distributed by means of various bulletin boards and conference disks. In addition these drivers will be candidates for being placed in a suite of drivers delivered with potential future products.

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### 9.3 NDIS Driver Enablement Offering

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#### 9.3.1 DWB Functional Verification Test

DWB Associates Inc., is an independent software company that offers services related to development and testing of NDIS MAC drivers for a variety of LAN products including IBM Extended Services for OS/2 and OS/2 LAN Server. For a fee DWB offers OEM LAN adapter NDIS MAC driver functional verification test of LAN Adapter and Protocol Support which contains the NDIS Protocol drivers used in Extended Services for OS/2 and LAN Server. DWB also provides for testing the NDIS interface of a MAC driver using the IBM NDIS MAC driver test tool program. According to DWB, these tests may be useful for newly developed NDIS drivers or drivers that have undergone extensive modifications in order to comply with implementation of NDIS in the IBM OS/2 products. Inquiries regarding these offerings should be directed to DWB at (503) 626-3081. Any claims of compatibility with OS/2 will be made by each OEM vendor or by DWB. DWB certification of OEM NDIS drivers and adapters is not meant in any way to constitute an endorsement of any OEM product by IBM, and IBM does not warrant, or provide technical or defect support for, claims made by any OEM or by DWB.

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#### 9.3.2 National Software Testing Laboratories Compatibility Test

National Software Testing Laboratories, Inc. (NSTL) is an independent laboratory that offers an OEM LAN adapter NDIS MAC driver compatibility testing service for IBM Extended Services for OS/2 and LAN Server. Manufacturers of NDIS-compliant LAN adapters will be able, for a fee, to submit their adapters and NDIS drivers along with a network information file (NIF) to NSTL for certification. Inquiries regarding this service should be directed to NSTL at (215) 941-9600. Any claims of compatibility with Extended Services for OS/2 or LAN Server will be made by each OEM LAN adapter manufacturer or by NSTL. NSTL certification of OEM NDIS drivers and adapters is not meant in any way to constitute an endorsement of the OEM's products by IBM, and IBM does not warrant or provide technical or defect support for, claims made by any OEM or by NSTL.

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#### 9.3.3 IBM Complementary Delivery of OEM NDIS MAC Drivers

Any OEM NDIS SAC driver which satisfies the requirements for distribution, as described in the following two sections, will be placed in selected IBM distribution channels.

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#### 9.3.3.1 Prerequisites for Distribution

An OEM adapter owner with an NDIS MAC driver has the option of certifying with NSTL as compatible with Extended Services for OS/2 and LAN Server. If the owner has been certified by NSTL as compatible with IBM Extended Services for OS/2 and IBM OS/2 LAN Server and signs an agreement to distribute with IBM, the NDIS MAC driver will be placed on selected IBM distribution channels such as the IBM National Support Center Bulletin Board System (NSC BBS) and on the IBM OS/2 Conference on CompuServe** (OS/2 Disk). Placing an OEM NDIS driver on the IBM BBS and on the IBM OS/2 Conference on CompuServe for distribution is not meant in any way to constitute an endorsement of the OEM products by IBM, and IBM does not warrant, or provide technical or defect support for, claims made by any OEM NDIS driver owner.

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#### 9.3.3.2 NDIS Driver Availability For Customers

As a primary means of delivering NDIS MAC drivers IBM ships with IBM Extended Services for OS/2, IBM OS/2 LAN Server Version 2.0, IBM LAN Enabler Version 2.0, IBM TCP/IP for OS/2 1.2.1, IBM LAN Server Version 3.0, and IBM Network Transport Services/2 Version 1.0 a suite of NDIS MAC drivers that are tested and supported by IBM. A list of the drivers and adapters supported are in the NDIS Implementation Information for IBM LAN Systems, IBM OS/2 LAN Technical Reference Extensions document. Also, these drivers have been uploaded into IBM secondary delivery channels, such as the IBM National Support Center bulletin board system and on the OS/2 forum of CompuServe. As future IBM drivers are tested and approved, they will be also added to the secondary channels. OEM driver owners who qualify their drivers through NSTL and sign an agreement to distribute with IBM, will have that driver added to selected IBM channels for distribution, such as the bulletin board and conference forum mention for IBM drivers above. In addition these OEM drivers will be candidates for being paced in a suite of drivers delivered with potential future products.

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#### 9.3.4 National Language Support

Use of the message and message help file for National Language Support is optional. The message file provides runtime messages for the users to report error conditions. The message help file provides help prompts to the user at key interactive decision points of the runtime process.

Since these files provide text to be displayed on a panel, they can be written in any language. If more than one language is to be supported, the naming convention must support that process. IBM suggests the following:

Use the IBM country code to specify the language the files are written in. For example, if you would normally name English files as ADPT.MSG and ADPTH.MSG for the message and message help files respectively, then the country name files for Germany would be ADPT.049 and ADPTH.049 where 049 is the country code for Germany. The following is a list of IBM country codes supported by IBM OS/2 2.0:

      785  Arabic speaking
      099  Asian English
      061  Australia
      032  Belgium
      002  Canada (French speaking)
      042  Czechoslovakia
      045  Denmark
      358  Finland
      033  France
      049  Germany
      972  Hebrew speaking
      036  Hungary
      354  Iceland
      039  Italy
      081  Japan
      082  Korea
      003  Latin America
      031  Netherlands
      047  Norway
      048  Poland
      351  Portugal
      088  Republic of China
      034  Spain
      046  Sweden
      041  Switzerland
      090  Turkey
      044  United Kingdom
      001  United States
      038  Yugoslavia

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## Notices

May, 1993

Issued by:

IBM Corporation
Personal Software Products
11400 Burnet Road
Austin, Texas 78758

First Edition (May 1992)

Second Edition (May 1993)

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 program(s) described in this publication at any time.

It is possible that this publication may contain reference to, or information about, IBM products (machines and programs), programming, or services that are not announced in your country. Such references or information must not be construed to mean that IBM intends to announce such IBM products, programming, or services in your country.

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### Copyright Notices

© Copyright International Business Machines Corporation 1992, 1993. 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.

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### Disclaimers

References in this publication to IBM products, programs, or services do not imply that IBM intends to make these available in all countries in which IBM operates. Any reference to an IBM product, program, or service is not intended to state or imply that only IBM's product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any of IBM's intellectual property rights or other legally protectible rights may be used instead of the IBM product, program, or service. Evaluation and verification of operation in conjunction with other products, programs, or services, except those expressly designated by IBM, are the user's responsibility.

IBM may have patents or pending patent applications covering subject matter in this document. The furnishing of this document does not give you any license to these patents. You can send license inquiries, in writing, to the IBM Director of Commercial Relations, IBM Corporation, Purchase, NY 10577.

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### Trademarks

The following terms, denoted by an asterisk (*) in this publication, are trademarks of the IBM Corporation in the United States and/or other countries:

OS/2 | IBM | Extended Services

The following terms, denoted by a double asterisk (**) in this publication, are trademarks of other companies as follows:

Microsoft | Microsoft Corporation
3Com | 3Com Corporation
CompuServe | CompuServe Incorporated

All other company, brand, and product names are trademarks or registered trademarks of their respective owners.