The direct download link for Hercules z/OS 2.1 is:
Run Hercules, load your config file ( hercules -f zos21.cnf ), and type ipl 83f at the Hercules prompt. hercules z os 21 download link
Downloading for use with the Hercules emulator involves two distinct components: the emulator software itself and the operating system files. 1. Download the Hercules Emulator The direct download link for Hercules z/OS 2
If you are a student, email IBM’s Academic Initiative directly. They will provide you a legal, time-limited download link for Z/OS 2.5, which is 99% identical to 2.1 for learning purposes. time-limited download link for Z/OS 2.5