SIMH
| Developer(s) | Robert M. Supnik | 
|---|---|
| Initial release | 1993[1] | 
| Stable release | 3.9 / May 3, 2012 | 
| Operating system | Microsoft Windows, Linux, Mac OS X, FreeBSD, OpenBSD, NetBSD, OpenVMS and others | 
| Platform | x86, x86-64, IA-64, PowerPC, SPARC, ARM | 
| Type | OS-level virtualization, Free virtualization software, Linux emulation software, Mac OS X emulation software, Windows emulation software | 
| License | MIT (modified) | 
| Website | 
simh github  | 
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 and DEC vice president, and has been in development in one form or another since the 1960s.
History
SIMH was based on a much older systems emulator called MIMIC, which was written in the late 1960s at Applied Data Research.[1] SIMH was started in 1993 with the purpose of preserving minicomputer hardware and software which was fading into obscurity.[1]
Emulated Hardware

Version 6 Unix for the PDP-11, running in SIMH

Version 7 Unix for the PDP-11, running in SIMH

SIMH emulates hardware from the following companies.
Data General
Digital Equipment Corporation
GRI Corporation
- GRI-909
 
Hobbyist Projects
IBM
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
References
- 1 2 3 "Preserving Computing's Past: Restoration and Simulation" Max Burnet and Bob Supnik, Digital Technical Journal, Volume 8, Number 3, 1996.
 - ↑ http://www.schorn.ch/altair_5.php
 
External links
- Official website
 - Additional VAX/MicroVAX models for SIMH
 - Running VAX/VMS Under Linux Using SIMH
 - OpenBSD/vax on SIMH
 - Debian Package
 - FreeBSD Port
 - An operating system lecture based on SIMH
 - UNIX: Old School. Using SIMH to explore UNIX history - Matthew Hoskins
 
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