The Open SIMH project - Kit Distribution

This website contains builds of the Open SIM simulators.

There are three types of builds:

Snapshot builds are made regularly from the development sources, and may be unstable.
Release builds are not (yet) formal releases, but are believed to be stable.
Debug builds are built with debugging features (for the simulators) enabled.

At the present time, only Windows builds are available on this site, though that will change in the future.

For additional information, see the main Open SIMH website.

Open SIMH V3 is the legacy version of Open SIMH. It contains fewer features than V4, and is in maintenance mode. It is currently the most stable version, although we recoomend that new users start with V4.

Select the operating system on which you want to run Open SIMH below.

Open SIMH V4 is the version of Open SIMH in active development. It contains more features and simulators than the legacy branch. Many of the features make it more convenient to use. We recoomend that new users start with V4. Over time, we expect that users of the legacy version will migrate to V4.

Select the operating system on which you want to run Open SIMH below.

Simulators in this directory run under the Windows operating system. Select "Releases" for the most tested version. Select "Snapshots" for the daily snapshots of work in progress.

Snapshots capture the development work in progress, and are a good choice if you are comfortable living on the bleeding edge.

Releases are issued when development has reached a stable milestone, Our current process is somewhat informal, but will improve.

Windows currently runs on the 32-bit x86 architecture, the 64-bit x64 architecture and the 64-bit ARM architecture. We currently build Open SIMH for x86 and x64.

Each kit on this page consists of an archive or installer that contains executable images of all supported simulators.

The kit names are in five parts - but the latest version will be first!

The date of the last commit (change) incorporated in the kit.
A unique identifer ("commit id") of the contents that can be used to get the corresponding sources from our git repository.
The platform name on which the simulator will run.
The architecure on which the simulator will run.
"Release" is the recommended, and optimized version. "Debug" indiates a simulator built with features useful for debugging the simulator.

To see the contents of an archive without downloading it, click on the Text icon icon. To download a kit's signature, click on the Signature icon icon.

Kits are signed by the Open SIMH build bot with PGP key: A1D5 8506 99CA 39CF 773B 1DFB 2445 6AB6 3A8F 0169

These kits are provided in two formats: zip archives and Windows (MSI) installers. To unpack the zip archives, use Windows explorer in recent versions of Windows. For older versions of Windows, use an external tool such as PKWARE's Zip Reader, available here. To use the Windows installers, simply download and click on them; you'll get the usual dialog from which you can customize the installation. Both formats provide the same simulators and come with digital signatures.

These kits are BZIP2 compressed files. To unpack them, use tar -xaf, bunzip2; tar -xf, or 7-zip. Click here to download 7-zip from its website.

ARM kits are not yet available.

macOS kits are not yet available, but are in development.

Linux kits are not yet available, but are in development.

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