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 feature 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.
Download the latest sources
for SIMH (V3.9-0) updated
03-May-2012. The change history can be found in the sim_rev.h header
Download sources to beta simulators
- simulators that have not been finished.
Download a zip file containing Windows
executables for all the SIMH simulators. The VAX and PDP-11 are
compiled without Ethernet support.
Download PDF copies of the documentation
Download the Word masters of the documentation
Bug fixes for 3.9-0 can be found here. These include
important fixes for the VAX780, PDP-11, and 1401.
SIMH implements simulators for:
Data General Nova, Eclipse
Digital Equipment Corporation PDP-1, PDP-4, PDP-7, PDP-8, PDP-9, PDP-10,
PDP-11, PDP-15, VAX
GRI Corporation GRI-909, GRI-99
IBM 1401, 1620, 1130, 7090/7094, System 3
Interdata (Perkin-Elmer) 16b and 32b systems
Hewlett-Packard 2114, 2115, 2116, 2100, 21MX, 1000
MITS Altair 8800, with both 8080 and Z80
Royal-Mcbee LGP-30, LGP-21
Scientific Data Systems SDS 940
The beta kit includes simulators for:
SiCortex SC-1 processor
XDS Sigma 32b processors
Digital Equipment Corporation EV-5 processor
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.
Papers on Simulation and Historic Hardware
Links to Computer History and Simulation Resources
Updated 09-Dec-2012 by Bob Supnik (simh AT trailing-edge DOT com
- anti-spam encoded)