About this information. IBM z/OS Version 2 Release 3

z/OS Version 2 Release 3 is a comprehensive guide on how to program MVS Assembler Services. This guide covers a range of topics, including linkage conventions, subtask creation, program management, 31-bit addressing, resource control, program interruption services, recovery, dumping virtual storage, reporting symptom records, virtual storage management, the 64-bit address space, callable cell pool services, data-in-virtual, access registers, data spaces and hiperspaces, window services, sharing application data, processor storage management, sharing data in virtual storage, timing and communication, translating messages, data compression and expansion services, accessing unit control blocks, setting up and using an internal reader, using the symbol substitution service, using system logger services, Unicode instruction services, transactional execution, and using the unit verification service.

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IBM z/OS MVS Programming: Assembler Services Guide Version 2 Release 3 | Manualzz

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Key features

  • Provides comprehensive coverage of MVS Assembler Services

  • Explains linkage conventions and subtask creation

  • Covers program management and 31-bit addressing

  • Details resource control and program interruption services

  • Guides on recovery and dumping virtual storage

  • Explains virtual storage management and the 64-bit address space

  • Covers callable cell pool services, data-in-virtual, access registers, and data spaces

  • Details window services, sharing application data, and processor storage management

  • Explains data compression and expansion services

  • Covers access to unit control blocks and setting up an internal reader

Frequently asked questions

MVS Assembler Services is a set of functions that allow you to write programs that interact with the MVS operating system directly in assembler language.

The guide covers both 31-bit and 64-bit addressing modes. It provides instructions on how to write programs that run in both modes and how to switch between them during program execution.

Data spaces and hiperspaces are ways to manage data storage in virtual storage. Data spaces are similar to the primary address space, while hiperspaces offer greater flexibility for shared data.

The guide emphasizes the importance of providing recovery routines for your programs, particularly when interacting with critical system resources. It explains how to write recovery routines to handle errors and ensure data integrity.

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