English

A Programmer's Introduction to IBM System/360 Student Text

This student text is an introduction to System/360 assembler language coding. It provides many examples of short programs shown in assembled form. Some elementary programming techniques and the specific instructions illustrated in the programs are discussed in simple, relatively nontechnical terms. Much of the text is based on information in IBM System/360 Principles of Operation (GA22-6821). This includes a brief review of relevant System/360 concepts and descriptions of selected assembler language instructions for arithmetic, logical, and branching operations. Standard (fixed-point), decimal, and floatingpoint arithmetic are discussed. The book also includes an elementary introduction to assembler language and the assembler program, and chapters on base register addressing and on program linkages and relocation. The coding of many other common programming techniques, such as the use of branches, loops, and counters, is shown. The use of macro instructions is demonstrated, but not covered in detail.

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