[fpc-devel] Multithreading under DOS
mschnell at lumino.de
Fri Sep 27 13:52:56 CEST 2013
On 09/27/2013 01:32 PM, Thaddy wrote:
> 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 ;)
You are probably right.
But those nice little DOS - Appliances (most vividly I remember one by
Innominate, that in the background acted as a Novel Print server)
seemingly did something very close to preemptive multitasking.
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