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Understand how interpreted and JIT-compiled languages execute. Build a bytecode VM from scratch, explore CPython and JVM internals, understand WebAssembly, and learn emulation by building CHIP-8 and console emulators.
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Decode an Opcode to Its Mnemonic
build a bytecode VM tutorial
Virtual Machines and Runtimes explain how languages that are not "native C" still run fast enough to matter. You design a small ISA, implement a stack machine, add control flow and calls, then touch GC and JIT ideas. CPython and JVM subtracks show how real runtimes represent objects, frames, and compilation tiers. WebAssembly covers binary modules and validation. Emulation builds CHIP-8 and console-shaped systems so fetch-decode-execute becomes muscle memory.
"Build a bytecode VM tutorial" is the headline query. Compilers is the best prerequisite; Language Foundations is mandatory. When you finish, language implementation interviews and runtime debugging stop being abstract theory.
Build a complete bytecode virtual machine from scratch. Design an instruction set, implement a stack-based interpreter, add control flow, functions, closures, a compiler, GC, JIT, and coroutines.
Understand the reference implementation of Python. Read CPython source code, trace function calls through the eval loop, understand the GIL, implement C extensions, and explore memory management.
Understand how Java bytecode runs. Inspect bytecode with javap, parse .class files, build a minimal JVM, understand class loading, JIT compilation tiers, and garbage collection.
Understand the portable bytecode for the web. Compile C to Wasm, parse binary modules, implement a stack machine interpreter, understand linear memory, validate modules, and run Wasm outside the browser with WASI.
Make your software pretend to be different hardware. Build a CHIP-8 emulator, expand to NES CPU/PPU/APU, implement a Game Boy emulator, understand dynamic recompilation for speedup, and add save states.
Difficulty Progression