open-simh ☆

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Description:
Multi-system computer simulator

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Developer tools

Tags: emulator retro-computing preservation simulation vintage

Install: brew install open-simh

About:
OpenSimh is a maintained fork of the classic SIMH simulator, preserving vintage computing architectures. It provides cycle-accurate emulation of historical hardware, enabling users to run legacy operating systems and software. The project focuses on modern build support and active community development.

Key Features:

Emulates dozens of historical CPU architectures (PDP, VAX, IBM360, etc.)
Active community fork with modern compiler and OS support
Cycle-accurate simulation for authentic performance behavior
Flexible device emulation and peripheral configuration

Use Cases:

Running legacy operating systems for historical research or education
Software preservation and archival of vintage applications
Embedded systems development and testing against legacy hardware

Alternatives:

simh/simh – Original upstream SIMH project; less actively maintained than OpenSimh

Version History

Detected	Version	Rev	Change	Commit