i am stuck at problem, i tried to crate 3, out of which 2 tasks for getting i/p from user. each of two task stores 1 int to reg and third task calculate addition of two and display output at serial port.. problem: how to access register and use them? ..... NEED HELP!! if any one could tell me where to find some material on this stuff... i have already read REGFILE Compiler and linker directive ... but could'n get how to use it?