Hi Bernd,
Microsoft and IBM released the source code of MS-DOS 4.0 under MIT license [1]. To me, it looks fairly complete. Greetings, Bernd [1] https://github.com/microsoft/MS-DOS/tree/main/v4.0
As mentioned by DOSEMU2 people, this is a somewhat exotic, but interesting MS DOS 4.00, not the once widespread 4.01: https://cloudblogs.microsoft.com/opensource/2024/04/25/open-sourcing-ms-dos-4-0/ Cheers, Eric _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
