Every Spectrum, from the 16K to the Next.
An emulator of the whole Sinclair line — 16K, 48K, 128K, +2A, +3 and the ZX Spectrum Next. Play the classics, run the latest Next releases, or build your own.
Complete Next hardware
The full Next core — Z80N, Layer 2, sprites, tilemap, copper, DMA, CTC and audio — verified against the real Next FPGA.
Scriptable debugging
A plain-text ADP protocol over TCP — drive the machine, set breakpoints and read any state from any client, with no recompile.
Runs the whole library
Tapes, disks, snapshots and .nex files, plus SD-card images to boot NextZXOS — from 16K classics to the newest Next demos and games.
Cross-platform
Native builds for macOS, Windows and Linux, in a single self-contained window.
Latest news
More Bizmuth news →Bizmuth 1.0.0-rc3 is available to download. Seven new ADP commands let a tool drive the emulator: reset it, run a bounded number of frames, read physical RAM, s…
Bizmuth now runs in your browser. Try it online: press a machine’s button and it boots.
Bizmuth 1.0.0-rc1 is available to download — the first release candidate for 1.0.0. The headline is speed: emulation is faster, and the emulator spends much les…