[fpc-pascal] Threading in FPC DOS

[Andreas Berger]

I need to implement some simple threading in a DOS application I am 
writing with FPC. What I need to know is the following:

1) Does FPC protect it's stack or can I allocate memory from the heap 
and point SS and ESP to it for the threads stack.

2) If the stack is protected, how do I allocate stack memory for new 
threads?

Regards,
Andreas