A fully functional mainframe environment with a COBOL compiler, assembly, and JCL support. It looks and feels almost exactly like a modern z/OS terminal. 2. IBM Z Development and Test Environment (ZD&T) This is the official way to run modern z/OS on a PC.
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Most hobbyists use the . These were special distributions of z/OS provided by IBM for developers and partners to test applications. hercules z os 21 download link
To actually interact with the system once it's running, you will also need: A fully functional mainframe environment with a COBOL
is an open-source emulator that allows your personal computer (Windows, Linux, or macOS) to mimic IBM mainframe hardware (System/370, ESA/390, and z/Architecture). hercules z os 21 download link