The Computer History Simulation Project

The Computer History Simulation Project is a loose Internet-based collective of people interested in restoring historically significant computer hardware and software systems by simulation. The goal of the project is to create highly portable system simulators and to publish them as freeware on the Internet, with freely available copies of significant or representative software.

V3.9 (and bug fixes to it) is the last release of SimH that will be hosted at this web site. All future versions can be found in a public source repository.


SIMH is a highly portable, multi-system simulator.

SIMH implements simulators for:

The beta kit includes simulators for:

Also available is a collection of tools for manipulating simulator file formats and for cross-assembling code for the PDP-1, PDP-7, PDP-8, and PDP-11.

Software Kits to run on SIMH

Help with SIMH

System Photographs

Papers on Simulation and Historic Hardware

DEC's Microprocessors (through 1992)

Future Work and Items Needed

List of Contributors

Links to Computer History and Simulation Resources

Updated 03-May-2012 by Bob Supnik (simh AT trailing-edge DOT com - anti-spam encoded)