[fpc-devel] Multithreading under DOS

Thaddy thaddy at thaddy.com
Fri Sep 27 13:32:36 CEST 2013

Even that is TSR based, not a real multi-tasker.
Under DOS a process can be swapped out and re-activated by a hardware 
interupt, either f.e. a timer or the keyboard.
So, at most, co-operative multi-tasking in the sense that multiple 
processes can run at the same time.
Because DOS is non-re entrant real multitasking will be very hard to 
achieve. It would be done by now ;)

On 27-9-2013 13:28, DaWorm wrote:
> On Sep 27, 2013 3:27 AM, "Michael Schnell" <mschnell at lumino.de 
> <mailto:mschnell at lumino.de>> wrote:
> >
> > In fact I remember that there even was a "multitasking" add-on for 
> DOS. Same allowed for switching between multiple DOS desktops without 
> needing a graphical UI. I don't remember the features and the 
> requirements.
> Perhaps you are thinking of Desqview/386?
> Jeff
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