What's Next?

Congratulations

You have completed all 16 lessons. You now understand ARM64's register model, memory operations, control flow, functions, bitwise operations, and have implemented real algorithms in assembly.

That is a real accomplishment. ARM64 assembly is not easy, and you have built a solid foundation.

What to Explore Next

• System calls -- Linux has hundreds of syscalls beyond write and exit: open, read, mmap, socket, and more.
• SIMD/NEON -- ARM64's vector instructions for parallel data processing.
• Floating point -- ARM64 has 32 dedicated 128-bit vector/FP registers (V0-V31).
• Atomic operations -- LDXR/STXR for lock-free concurrent programming.
• Exception handling -- How ARM64 handles interrupts, page faults, and system calls at the hardware level.
• Performance optimization -- Instruction scheduling, cache effects, and branch prediction.

Build Something

• A simple shell -- Read commands, fork processes, execute programs.
• A bootloader -- Write bare-metal ARM64 code that runs without an OS.
• An emulator -- Build an emulator for a simpler architecture (like CHIP-8) in ARM64.
• Optimize a hot loop -- Take a C function, look at the compiler output, and hand-optimize it.

References

• ARM Architecture Reference Manual -- the definitive reference for ARM64.
• ARM64 Instruction Set Quick Reference -- concise instruction reference.
• Azeria Labs ARM Assembly Basics -- excellent tutorials on ARM assembly.
• ARM Assembly Internals and Reverse Engineering by Maria Markstedter -- comprehensive book.
• Computer Organization and Design: ARM Edition by Patterson and Hennessy.