SIMH

SIMH
Developer(s)	Robert M. Supnik
Initial release	1993
Stable release	3.11-1 / March 14, 2020
Preview release	4.0-Beta-1
Repository	github.com/simh/simh;
Written in	C
Operating system	Windows, Linux, macOS, FreeBSD, OpenBSD, NetBSD, OpenVMS
Platform	x86, IA-64, PowerPC, SPARC, ARM
Type	Hardware virtualization
License	MIT (modified)
Website	simh.trailing-edge.com

SIMH is a highly portable, multi-system emulator which runs on Windows, Linux, macOS, FreeBSD, OpenBSD, NetBSD and OpenVMS. 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

"4.3 BSD UNIX" from the University of Wisconsin, on a simulated VAX.

SIMH emulates hardware from the following companies.

Advanced Computer Design

PDQ-3

AT&T

3B2

GRI Corporation

GRI-909

Hewlett-Packard

2116
2100
21MX
3000

Honeywell

H316
H516

Hobbyist projects

N8VEM^[2]

IBM

1401
1620
1130
650
701
7010
704
7070
7080
7090/7094
System/3

Intel

Intel systems 8010 and 8020

Interdata

16-bit series
32-bit series

Lincoln Labs – MIT Research Lab

TX-0

Manchester University

Baby, or SSEM

MITS

Altair 8800 both Intel 8080 and Zilog Z80 versions

Royal-Mcbee

LGP-30
LGP-21

Sage Computer Technology

Sage II

Scientific Data Systems

SDS 940

SWTPC

SWTPC 6800

Xerox Data Systems

Sigma

References

^ ^a ^b ^c "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

[dtjn02pf-1] "Preserving Computing's Past: Restoration and Simulation" Max Burnet and Bob Supnik, Digital Technical Journal, Volume 8, Number 3, 1996.

[2] ttp://www.schorn.ch/altair_5.php

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