Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Assembly instruction set depends on the architecture and to which extent you are familiar with it.
While C is more generic but not in everything, there are some parts related to the architecture too, but not many, that's why they call "C" portable, which mean you can port the code to different processor easily.