Note: A real mainframe IPL (boot) is slow because it initializes thousands of I/O devices. Even on a PC, emulation doesn't speed that up dramatically.
Once it’s up, you are greeted by a TSO (Time Sharing Option) command line or, if you’re lucky, the ISPF (Interactive System Productivity Facility) menu—a full-screen, keyboard-driven interface that predates Windows 3.1. There is no mouse. There are no icons. There is only the blinking cursor and the vast, unforgiving ocean of JCL.
Booting z/OS on Hercules is less "double-click and go" and more "orchestrate a rocket launch." You need to: