Microsoft and IBM release MS-DOS 4.00 source code

In a celebration of innovation and preserving computing history, Microsoft has released the source code for MS-DOS 4.00 in partnership with IBM. The release – available under the permissive MIT license – includes the operating system's source code, binary files, and original documentation.

The decision to open source MS-DOS 4.00 stems from recent correspondence between a researcher named Connor "Starfrost" Hyde and former Microsoft CTO Ray Ozzie. While exploring Ozzie's...

26 April 2024 | Open Source

Source code for the hopefully defunct Windows XP leaks online

Please say you’re not still using Windows XP.

Unlike the code released yesterday by Frictional Games for its Amnesia series, the leak of Microsoft’s source code wasn’t intentional. We can’t endorse looking at stolen code or link to it… but, well, we can tell you it’s out there.

Looking at what makes an OS tick can be a fascinating exercise (and it should leave you less breathless than the exercises that Joe Wicks fella put out throughout...

25 September 2020 | Platforms