Firstly, I would like to apologize of my first post, wich wasn�t clear enough.
Secondly, I would like to thank you for your help.

My problem is that I must program an interrupt service routine that is
executed when the predeterminated IRQ is rised, because the data adquisition
card has finished the A/Dconversion.

I have read all the responses, but there is already two doubts in my mind :
 - Does Linux allow to define a hardware interrupt service routine ?
 - Does GNAT for Linux support this feature ?

Thanks in advance.

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