GNU Assembler

I started studying for my Final year project - goaTee,a Mexokernel based Operating System, since last week. The team includes 8 members. Joe steeve of MECSE is guiding us to do the project. He had programmed the kernel and we are going to build the other layers of the OS. Now i am studying how to program using GNU Assembler. I am referring the tutorials downloaded from


http://savannah.nongnu.org/download/pgubook/
ProgrammingGroundUp-1-0-booksize.pdf


Though the book deals from basic concepts, i find easy to learn things from it.