This is the base software. It emulates S370, S390 and zArch. On this you may run any IBM mainframe OS.

This is a patch to Hercules that introduces a new hardware platform called S380. It is largely the same as S370 but it also supports 31 bit addressing and most of the S390 instructions. This allows you to also run an OS designed for this platform like MVS380, VM380, DOS/VS and VSE380.

This is a CD image containing an old version of Hercules and MVS3.8j. It allows you to run this version of MVS without having to go through a complete sysgen procedure.

This is an addition to the Turnkey system. It contains a number of macro's, some JCL and a number of batch files for those who wish to run MVS380 under windows.

This is a patch to the Turnkey's OS (MVS3.8j). It adds amode 31 to this OS and installs a number of tools such as GCCMVS.

This is our solution for those who would like to legally run a 31-bit MVS. It is built on the free MVS version 3.8j and contains a number of patches to make it look more like MVS/XA. It can actually run some 31-bit z/OS binaries!

This is the VM equivalent to the MVS-turnkey system. Only this is not distributed as an ISO-file, but a simple zip archive.

This file contains all the patches needed to turn the turnkey-VM system into a 31-bit VM.

This is our solution for those who would like to legally run a 31-bit VM. It is built on a free VM version.

This directory contains zip archives of the DOS/VS 5-pack system v1r0m1. Hosting courtesy of Jeff Sipek.

This is our solution for those who would like to legally run a 31-bit DOS/VSE. It is built on a free DOS/VS.