Organization

This manual is divided into the following sections and appendices:

Chapter 1, The SNA Network and LU 6.2 API, gives an overview of the SNA environment and Advanced Program-to-Program Communication. It explains the LU 6.2 architecture and Hewlett-Packard's implementation of LU 6.2 API.

Chapter 2, Conversations, describes what a conversation is and the different kinds of conversations that application programs can have. It explains the tasks necessary to establish a conversation.

Chapter 3, Intrinsic Overview, discusses how LU 6.2 API intrinsics are used to implement the conversations described in chapter 2.

Chapter 4, Conversation States, gives an explanation of conversation states and explains the relationship between states and conversations.

Chapter 5, Intrinsic Descriptions, describes each of the intrinsics available with LU 6.2 API.

Chapter 6, Buffer Management, explains how LU 6.2 API manages its send and receive buffers and the impact this has on LU 6.2 API applications.

Chapter 7, Debugging, explains the user trace and the steps for debugging LU 6.2 API applications.

Appendix A, Status Info, explains all the status info values that can be returned by LU 6.2 API intrinsics.

Appendix B, Sample Programs, contains a sample transaction program, in COBOL II and Pascal on the HP 3000 side, and in PL/1 on the IBM side.

Appendix C, State Transition Tables, lists the intrinsics that can be called from each state and the effect of each intrinsic on the state of a conversation.

Appendix D, LU 6.2 Verb Table, maps the LU 6.2 architected verbs to Hewlett-Packard's LU 6.2 intrinsics.

Appendix E, Transact Parameter Masks, describes the parameter masks used in Transact programs on MPE V systems.

Appendix F, Migrating Transaction Programs, provides information on migrating LU 6.2 API applications from MPE V to MPE XL or from earlier versions of LU 6.2 API/XL to the Node Type 2.1 version of LU 6.2 API/XL.