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Stack and interrupt question

Hi all,
 I noticed some strange behavior with functions arguments in my software. I think it could be due to a stack problem.
What is the default stack size? How do I change this size?. I'm using 2.4.22 linux version, and Developer Board 82 Release 1.92 tools.

At the moment my software interact with external devices polling them. I'm planning to change this, and use interrupts instead of polling.
Unfortunately I don't know much about interruptions in C using the developer board. I really appreciate if someone could me send some basic
example code or point me to a good tutorial.

Thank you

Daniel Fraile i Vergel
W-onesys, SL
WDM Optical NEtworks SYStems
c/ Francesc Vila Nave 11, Poligon Industrial Can Magi
08190 Sant Cugat del VallÚs (Barcelona) - SPAIN
Tel. + 34 93 590 11 49
fax  + 34 93 590 11 57