Yes, 6.2, not 5.0 as I mentioned in my previous reply to this thread,
thanks for that correction.
On 12/25/2021 3:03 PM, tom ehlert wrote:
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
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