Back in 2014, Microsoft released the MS-DOS source code (versions 1.25 and 2.0) via the Computer History Museum. Last week, Microsoft "re-open-sourced" MS-DOS, but this time around via its GitHub acquisition.
Also: Microsoft 365: A cheat sheet TechRepublic
Microsoft officials said they opted to put MS-DOS on GitHub because " it's much easier to find, read, and refer to MS-DOS source files if they're in a GitHub repo than in the original downloadable compressed archive file," in the words of Senior Program Manager Rich Turner, who also has been spearheading Microsoft's Windows Subsystem for Linux and console work.
To be clear, the source files are for reference and internal experimentation only. Microsoft isn't allowing pull requests and modifications to the source.
The source code for the initial release of 86-DOS dates from around December 1980, Turner noted, and the MS-DOS 1.25 code from around May 1983. MS-DOS 2.0 dates from around August 1983.
The Register has a quick romp with s ome of the twists and turns in the history of MS-DOS, for those who might want a refresher.
Previous and related coverage:
You've just upgraded to the most recent version of Windows 10. Before you get back to work, use this checklist to ensure that your privacy and security settings are correct and that you've cut annoyances to a bare minimum.
You've got a new PC running Windows 10 Home. You want to upgrade to Windows 10 Pro. Here's how to get that upgrade for free. All you need is a Pro/Ultimate product key from an older version of Windows.
Microsoft is putting the mobile versions of its Office applications for Windows on the back burner, and is instead prioritizing development for the Win32 and web versions of those applications.
Consumer Reports is restoring its 'recommended' designation for the Surface Laptop, Pro and Book 2, but is not awarding it to the Surface Go.
- Windows 10: A cheat sheet TechRepublic
- Microsoft's obsession with Windows is ending CNET
- Top Windows 10 questions: How to install, secure, upgrade, get it for free
- Here's how Microsoft plans to milk more profits out of its cash cow
- Windows 10 tip: Disable annoying app notifications
- Microsoft is bringing the Robot Operating System to Windows 10
- Here's how we're hitting back at fileless malware, says Microsoft
- New Windows 10 preview updates sign-in screen
- Windows 10 October 2018 Update: Microsoft hustles to kill bugs
- PC sales might actually grow next year, thanks to Windows 10