Assembler

Introduction

Assembly language is the human-readable form of machine code: one instruction per CPU operation, no runtime, nothing hidden. This site teaches it on x86-64 Linux with NASM, from registers and syscalls up to SIMD, sockets, and a boot sector.

Everything on this site about assembly is listed below: the 50-lesson course, the install guides, and the external materials.

Course
Assembler course: zero to hero in 50 lessons

Assembler course: zero to hero in 50 lessons
What is assembly language
Install NASM and check the version
NASM syntax basics
Your first program
Registers
MOV and data transfer
Number bases and operands
Defining strings and data
Flags and the status register
Conditional jumps
Loops
The stack
Procedures
LEA and addressing modes
Memory layout: sections
Linux syscalls
Arithmetic
Bitwise operations
Arrays
Structures
Macros
Calling C functions
Debugging with GDB
The ELF format
Time and date syscalls
File I/O
Command-line arguments
Environment variables
Floating point (SSE)
SIMD basics
Interrupts
Sockets
A tiny HTTP client
Output formats: bin, elf, elf64
Advanced macros and %include
Linking object files
32-bit vs 64-bit
The System V ABI
Makefiles for assembly
Optimization basics
Error codes and logging
Parsing CSV
Data structures: linked list
A tiny HTTP server
Boot sector: hello in 512 bytes
Capstone: command-line calculator
Capstone: hex editor
Performance: cycles and cache
Modern x86: AVX tour
Hero roadmap: the whole course on one page
ARM assembly

Installing NASM
Install NASM on Windows 11
Install NASM on Ubuntu
Install NASM on Rocky Linux
Install NASM on macOS
Install NASM on FreeBSD
Assembly in Docker

External materials
NASM documentation
x86 and x86-64 instruction reference
System V ABI, x86-64 edition

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