Yes, Microsoft actually released the source to MS-DOS twice. Once under a license that was not friendly to open source, and again much later under the MIT license. The second release is significant because the MIT license is compatible with the GNU GPL that we use in the FreeDOS kernel and other programs, meaning you can study the MS-DOS code and then contribute to FreeDOS. Under the previous license, that was not the case.
I wrote an article about it at the time: https://opensource.com/article/18/10/microsoft-open-source-old-versions-ms-dos On Fri, Dec 24, 2021 at 10:49 PM Jon Brase <jon.br...@gmail.com> wrote: > This is much more recently than I think you're thinking: > > https://github.com/Microsoft/MS-DOS > > Dec 24, 2021 22:42:44 Travis Siegel <tsie...@softcon.com>: > > > > That was caldera that released their opendos as opensource, not > Microsoft. > > > > There were versions of ms dos that escaped into the wild, but it wasn't > a sanctioned release from microsoft. > > > _______________________________________________ > Freedos-user mailing list > Freedos-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/freedos-user >
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