Sunday, December 09, 2007

My very own DEC minicomputer - sort of

SIMH is a highly portable, multi-system simulator maintained by Bob Supnik, former DEC engineer and vice president. SIMH runs on pretty much anything: UNIX, BSD, Linux, Windows and even OpenVMS. If you're into historic computing, simulation of historic hardware or trying to migrate some really ancient applications, look into SIMH.

SIMH can also be used to migrate old machines to new platforms. For example, you can run VMS/VAX using SIMH on a modern UNIX system (Vienna's city administration still runs some VMS / VAX systems, and has started migrating them via emulation).

You can even run modern operating systems on SIMH - like OpenBSD/vax.

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, 7090/7094, System 3
  • Interdata (Perkin-Elmer) 16b and 32b systems
  • Hewlett-Packard 2114, 2115, 2116, 2100, 21MX
  • Honeywell H316/H516
  • MITS Altair 8800, with both 8080 and Z80
  • Royal-Mcbee LGP-30, LGP-21
  • Scientific Data Systems SDS 940