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z390 - Mainframe Assembler and Emulator toolkit

Develop, test, and deploy mainframe assembler and COBOL programs on your PC

  • IBM® HLASM compatible macro assembler
    • Common z/OS® and z/VSE® compatible macros
    • Structured programming macros compatible with IBM HLASM Toolkit
  • IBM Enterprise COBOL compatible compiler
  • QSAM/VSAM compatible file processing
  • TN3270 compatible data streams
  • CICS® compatible transaction processor
  • GPLv2 licensed

Ideal for a number of use cases:

  • Learning IBM mainframe assembler programming without access to a mainframe.
  • Develop your mainframe application using modern tooling.

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IBM, CICS, z/OS and z/VSE are trademarks of IBM Corp., registered in the U.S. and other countries. The use of IBM Trademarks complies with the Fair use guidelines for use and reference of IBM trademarks.

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