This site documents SimH, a simulator for historic computersystems, as well as papers and reflections on the history of computing.
SimH (History Simulator) is a collection of simulators for historicallysignificant or just plain interesting computer hardware and software from the past.The goal of the project is to create highly portable system simulatorsand to publish them as open-source software on the Internet, with freely available copiesof significant or representative software.
This site contains the "classic" version of SimH, the 3.X stream. Itincludes all of the simulators I wrote or maintain, as well asthe current releases of J. David Bryan's HP simulators. It also hasa collection of papers and software kits that are applicable to allversions of SimH.
The V4 stream is substantially enhanced and contains many additionalsimulators. It can be found on GitHub under the nameOpen-SimH.
The source code in both V3 and (Open SimH) V4 is licensed underan "MIT-style" open-source license. Contributions to either streamare welcome if (and only if) they include this style of open-source license.
SIMH is a highly portable, multi-system simulator.
SIMH V3.x implements simulators for:
Also available is a collection oftoolsfor manipulating simulator file formats and for cross-assembling code forthe PDP-1, PDP-7, PDP-8, and PDP-11.
Updated 16-Jul-2024 by Bob Supnik (simh AT groups DOT io - anti-spam encoded)