If you cannot access ZD&T, (an open-source mainframe emulator) can run ADCD images. However, Hercules does not come with a license. You must already have a legal ADCD license from IBM. Many hobbyists use Hercules with ADCD for offline study.
ipl 1a0
Where 1a0 is the device number of the RES1 volume. ibm adcd z os download
Join the IBM Z Student Community or the Mainframe‑L listserv . Many members share scripts and configs to make the ADCD-to-ZD&T path smoother. Do not ask for direct download links—instead, ask for help navigating IBM’s licensing portals. If you cannot access ZD&T, (an open-source mainframe
– This is a licensed, emulated version of z/OS that runs on x86 hardware. It is the recommended legal alternative for developers who need a z/OS environment. If you cannot access ZD&T