It works as long as you don't try to reenter DOS (because the DOS API
switches stacks).
DOS never "sleeps". DOS is invoked as you use int 21h.
Leif
----- Original Message -----
From: "Michael Schnell" <mschn...@lumino.de>
To: <fpc-devel@lists.freepascal.org>
Sent: Thursday, September 26, 2013 2:45 PM
Subject: Re: [fpc-devel] Multithreading under DOS
On 09/26/2013 02:09 PM, Sven Barth wrote:
But on "bare metal" you don't have the OS in your way and thus can of
course implement preemptive multithreading as other operating systems are
also able to implement preemptive multithreading...
How do you think DOS would "get in the way" ?
As this is Dos, only a single program runs. Same gaps the interrupts it
wants to handle (e.g. timer, keyboard or serial, this in fact is a usual
way to do DOS programs). Now it runs and DOS sleeps.
-Michael
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