Quadium 4004 Workbench: an MCS-4 laboratory for Windows

High-fidelity Intel 4004 / MCS-4 workbench for Windows: From QuadBasic to assembly with no black boxes—Wishlist now on Steam.

QuadBasic → assembly: A purpose-built BASIC-style language that transpiles to Intel 4004 assembly so you can go from readable programs to runnable ROMs without mastering ASM first.
Low entry, high depth: Start without advanced assembly knowledge; deepen into 4004 assembly and system mapping when you are ready.
Learning included: 50+ tutorials and guides to move from first steps to richer MCS-4 scenarios.
No black boxes: Execution, mapping, and state are exposed for inspection—suited to teaching, debugging, and understanding what the machine is doing.
Virtual peripherals: Wire ROM/RAM-mapped I/O with a broad set of virtual devices for labs and experiments.