What a high level assembler can do for your business

IBM® High Level Assembler (HLASM) and Toolkit Feature is a flexible development solution for all Assembler Language applications. The assembler and optional toolkit improves programmer productivity and simplifies program development and maintenance. HLASM provides all the proven facilities found in earlier assemblers and includes many new facilities. It helps you develop programs and subroutines for functions not typically provided by other symbolic languages, such as COBOL, FORTRAN, and PL/I. The optional High Level Assembler Toolkit Feature is a powerful and flexible set of tools that ehnances application recovery and development.
IBM High Level Assembler and Toolkit Feature


Enhanced usability with warning-suppression option.


Simplified tool integration with improved SYSADATA record layouts.


Cross-system compatibility assisted by ASCII constants.


Simplified macro coding with longer macro arguments and string variables.

IBM High Level Assembler and Toolkit features

  • Comprehensive toolkit option
  • Support for Dynamic Link Libraries
  • Macros/COPY files in USS file system for cross-system use
  • Eight-byte address constants
  • Enhanced macro capability
  • Valuable diagnostics