The Computer History Simulation Project
Page 1

The Computer History Simulation Project is a group of people on the internet who are interested in preserving historically significant computer systems through software simulation. After all, who can afford the maintenance contract on transistors from 1978?

It started in 1993 at the suggestion of Larry Stewart of DEC and is coordinated by Bob Supnik who is one of the authors of the original MIMIC simulator upon which SIMH is based. SIMH is a freebie C program which emulates the instruction set of vintage computer systems in software and is effectively a 'virtual machine'.

It is available from http://simh.trailing-edge.com and the license allows more or less unrestricted use of the sources and binaries.

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
  • IBM 1401, 1620, 1130, System 3
  • Interdata (Perkin-Elmer) 16b and 32b systems
  • Hewlett-Packard 2116, 2100, 21MX
  • Honeywell H316
  • MITS Altair 8800, with both 8080 and Z80
  • Scientific Data Systems SDS 940
VAX 11/80 - 1977 MicroVAX II - 1985 VAX 6200 - 1988