Reimplementation · Operating Systems

FreeDOS

Author:

Replaces: Microsoft MS-DOS (5.x and 6.x)

Summary

A DOS-compatible operating system for running legacy MS-DOS applications and games on PCs.

Description

FreeDOS independently implements a DOS-compatible operating system for running legacy MS-DOS applications and games on IBM-compatible PCs. Its kernel derives from Pat Villani's DOS-C and implements DOS services alongside a separately maintained command interpreter and utilities.

Source repository ↗Website ↗Documentation ↗

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Compatibility and scope

Status and compatibility are maintainer-reported. Inclusion is not an independent verification or certification.

Development status: Stable
Compatibility: High (claimed)
Languages: C, Assembly
Platforms: Not documented
License: GPL-2.0-or-later

Known limitations

DOS compatibility is project-reported, not independently verified for every application or hardware configuration. Targets DOS programs rather than modern Windows applications. Distribution components use their own licenses. The catalog target covers later MS-DOS releases, not the early versions Microsoft has open-sourced.