MVS 3.8j

MVS 3.8 was the last true free sourced included version of MVS and remains the base of z/OS to this day. Volker Bandke made it widely accessible combined a well packaged system with a turnkey distribution of the Hercules mainframe emulator.

You can download the more up to date MVS 3.8j Tur(n)key 4- System by Jurgen Winkelmann here

https://wotho.ethz.ch/tk4-/

It is is the best starting point for MVS 3.8

You download the original Volker Tur(n)key 3 system using this link

ftp://cbttape.org/pub/cdimages/MVS_Turnkey_Volker_V3.zip

As an MVS 3.8 hobbyist you might be interested in this recently unearthed tape of ASP 3.2

The tape is AWSTAPE format (You will need Hercules, P390, etc to read or use file 533 VTT2TAPE utility to convert it to a real tape).

ASP 3.2 includes tapemap and AWS tape image created with VTT2DISK