Microsoft Unveils Open-Source MS-DOS 4.0 Code

loading Microsoft Unveils Open-Source MS-DOS 4.0 Code

Microsoft has expanded its open-source offerings by releasing the source code for MS-DOS 4.0 on GitHub under the MIT License. This addition complements the earlier releases of MS-DOS versions 1.25 and 2.0. MS-DOS 4.0, developed jointly with IBM, was a significant step in the evolution of operating systems, introducing features like improved memory management and support for larger hard drive partitions, up to 2 GB.

The release, while serving as a means to preserve computing history, provides a valuable resource for researchers, historians, and enthusiasts interested in the legacy of early PC operating systems. The source code is also available for educational purposes, allowing students and programmers to gain insights into the early development of software.

It's worth noting that the repository is archived, which means Microsoft is not accepting contributions or pull requests for this code. However, the availability of the source code allows for the use of emulators such as PCem and 86box to run the operating system on modern PCs. This initiative reflects Microsoft's ongoing commitment to open-source software and the promotion of transparency within the tech community.

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