>> That was caldera that released their opendos as opensource, not Microsoft.
> Caldera released Digital Research's DR DOS 7.01 as FOSS. It then > changed its mind and made v7.092 closed-source again, but 7.01 remains > FOSS and turned into OpenDOS, AKA DR OpenDOS and Open DR DOS. > And, for what it's worth, DR DOS has multitasking, and I've tried it, > and it works. while technically true, it couldn't just multitask ramdom DOS programs as multi tasking systems like OS/2 or better always could. programs would only multitask if specifically written to the DRDOS API - which almost nobody did (for commercial avalable software). >> There were versions of ms dos that escaped into the wild, but it wasn't >> a sanctioned release from microsoft. > This is not true. that is true. the (mostly) complete source code MSDOS 6.2 escaped into the wild, even if not widely available. > Microsoft has released MS-DOS 1.25, 2.0 and 2.11 as FOSS. > The OS/2 Museum have rebuilt it from source: > https://www.os2museum.com/wp/pc-dos-1-1-from-scratch/ > https://www.os2museum.com/wp/dos-2-11-from-scratch/ MSDOS 2.11 might be interesting from a museum/historic prespective. as an operating system it's completely obsolete and useless, and you will not learn much by studying the source code. there's a LOT that happened between 2.11 (october 1983) and 6.22 (april 1994) Tom _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
