Eligo

Porting VM/CMS Applications

Modernizing VM/CMS Applications

VM/CMS used to be a sophisticated and powerful environment both for development and production – back in the 1970s and 1980s.

Several companies kept on using VM/CMS even after z/OS or z/VSE was made their primary operating environment.

VM/CMS applications issue VM/CMS and CP commands. They “think” CMS, hence when it comes to replacing VM, the program logic will be difficult and expensive to change.

The Eligo framework was developed to

  • allow a swift and low-risk transformation of VM/CMS applications towards Linux or
  • make these applications runnable on z/OS or z/VSE

Eligo - the VM / CMS emulation

Paradigm