does Linux block ports and interrupts for user programs use ?
closed as not a real question by Tom Wijsman, Journeyman Geek, Paul, DragonLord, slhck♦ Jul 19 '12 at 1:58
It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.
The only interrupt a non-kernel program should be using is int 0x80, which is the interrupt to request one of the system calls listed in /usr/include/sys/syscall.h. If you want to directly interact with hardware interrupts, this should be done inside a kernel module. A good introduction to Assembly on a Linux system. This thread should also be useful for you.