Provides a versioned binary serialization framework used by all emulator components. Implements Section() with magic markers, type-safe Var*/VarArray/Vector for POD and std::string, and automatic backward compatibility. Could be extracted for any application needing snapshot/restore of complex object graphs.

Defines a clean interface for OS services (file I/O, threading, mutex, semaphore, logging, microphone, camera, network send/receive). The frontend implements this interface, keeping core emulation platform-agnostic. Demonstrates how to decouple a performance-sensitive core from GUI and OS specifics.

Header-only template providing static-size FIFO, dynamic FIFO, and RingBuffer with savestate integration. Used for audio, GPU command queues, and networking packets. Well-documented and self-contained; could serve as a standalone utility.

Implements a fixed-size bit array with fast range operations (set, clear, test) using optimal word-sized operations and compiler intrinsics where available. Used for VRAM tracking and dirty region management. More efficient than std::bitset for large sets; easily portable.

A templated register cache for JIT compilers that maps virtual registers to host machine registers with liveness tracking and spill support. Separates architecture-specific details from the allocation strategy. Could be reused in other JIT projects targeting different ISAs.