SIMH

SIMH is a highly portable, multi-system emulator which runs on Windows, Linux, Mac OS X, FreeBSD, OpenBSD, NetBSD, OpenVMS, and other operating systems. It is maintained by Bob Supnik, a former DEC engineer & DEC vice president and has been in development in one form or another since the 1960s.

History

The Origin of SIMH

SIMH was based on a much older systems emulator called MIMIC, which was written in the late 1960s at Applied Data Research. [http://simh.trailing-edge.com/docs/dtjn02pf.pdf]

SIMH on the PC

SIMH was started in 1993 with the purpose of preserving minicomputer hardware and software which was fading into obscurity. [http://simh.trailing-edge.com/docs/dtjn02pf.pdf]

Emulated Hardware

SIMH emulates the following hardware from the following companies.

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

* 16-bit series
* 32-bit series

Hewlett-Packard

* 2116
* 2100
* 21MX

Honeywell

* H316
* H516

MITS

* Altair 8800 both Intel 8080 and Zilog Z80 versions

Royal-Mcbee

* LGP-30
* LGP-21

Scientific Data Systems

* SDS 940

References

[http://simh.trailing-edge.com/docs/dtjn02pf.pdf "Preserving Computing's Past: Restoration and Simulation"] Max Burnet and Bob Supnik, Digital Technical Journal, Volume 8, Number 3, 1996.

External links

* [http://simh.trailing-edge.com SIMH web page]
* [http://www.wherry.com/gadgets/retrocomputing/vax-simh.html Running VAX/VMS Under Linux Using SIMH]
* [http://www.openbsd.org/vax-simh.html OpenBSD/vax on SIMH]
* [http://packages.debian.org/unstable/otherosfs/simh Debian Package]
* [http://www.freshports.org/emulators/simh FreeBSD Port]
* [http://www.ba-stuttgart.de/~helbig/os/index.html An operating system lecture based on SIMH]