I'm a high-school student interested in low-level and systems programming. I learned C a few months ago, have some basic C++ experience, and have built small projects such as simple Unix-command clones and basic libraries.
While reading about systems programming, I ran into operating-system and computer-architecture concepts I didn't understand, including CPU registers, memory addressing, and how the CPU and RAM interact. That led me to x86-64 NASM and assembly language.
I'm not trying to become an assembly programmer. My main goals are to understand how computers work at a lower level, learn systems programming and operating-system concepts, and eventually build Linux tools or experiment with creating a system from scratch. Is continuing with x86-64 assembly and computer architecture a sensible path, or should I focus on other fundamentals first?
3 Answers
Your approach is reasonable, as long as you keep it connected to projects. Learn enough assembly to understand registers, instructions, the stack, function calls, memory access, and how C code maps to machine code. You don’t need to memorize every instruction or write entire applications in assembly.
For your goals, spend time alongside that on C, Unix system calls, processes, virtual memory, files, threads, and basic operating-system design. Building small command-line tools, a shell, a simple allocator, or working through Linux From Scratch will probably teach you more than studying architecture in isolation.
Assembly becomes especially useful later for things like binary instrumentation, reverse engineering, JITs, custom virtual machines, boot code, and low-level optimization. Most ordinary system software can be written without directly using it, but knowing how to read it gives you a much better mental model of what the machine is doing.
The important thing is not to treat learning as a rigid sequence. Follow the topics that interest you, but keep returning to practical C and Unix projects so the architecture knowledge has somewhere to fit.
You don’t need to master assembly before doing systems programming. C already exposes many important ideas, including memory, pointers, stack behavior, control flow, and calling conventions. Assembly is still valuable to read, especially for debugging, optimization, reverse engineering, embedded work, and understanding how compilers translate code.
x86-64 is useful in practice, but it’s a complicated architecture for learning because it has accumulated a lot of historical baggage. A simpler ISA such as MIPS, ARM32, 68000, or 6502 can make the basic concepts easier to see. That said, if x86-64 is what keeps you interested, there’s no reason to abandon it.
That makes sense. I’m especially interested in building Linux tools such as a small package manager and eventually experimenting with a system built from scratch. I’ll keep learning assembly for the deeper understanding, while focusing more directly on the Linux API, operating-system concepts, and practical C projects.