Hi, This is a little offtopic but ... I'm working in an environment where the MMU has yet not been enabled (And hence on PC relative addressing can be used - no absolute addresses). I'm trying to build an exhaustive list (in terms of C language source contructs) of what I am allowed to do and what no. Can you please help me by adding to the list and verifying / disqualifying if anything is wrong: Allowed ======= 1) Local variables 2) Function calls using function name (right?) 3) if-then-else 4) for / while / do-while Not Allowed =========== 1) Accessing global variables 2) Function call using function pointers (why?) 3) Switch-case (why?) Any thing else that can be added to the "Not allowed" list? Thanks, Rajat - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs