# ZEsarUX

> ZEsarUX is an open source emulator for the ZX Spectrum, ZX80, ZX81 and many other Z80 machines, with extensive debugging tools and its own desktop.

Web page: https://emulationking.com/other/zxspectrum/emulator/zesarux/
Page updated: 2026-09-28

- Developer: César Hernández Bañó
- Source code: https://github.com/chernandezba/zesarux
- Supported systems: ZX Spectrum, Amstrad CPC, MSX, ColecoVision, SG-1000, SEGA Master System
- Runs on: Windows, Linux, macOS

ZEsarUX is an emulator by César Hernández Bañó that started as a ZX Spectrum emulator and grew to cover many machines built around the Z80 processor. Its name combines ZX, the author's name and Unix.

It emulates the ZX80, ZX81 and every Spectrum model, clones such as the Pentagon, Chloe and Timex machines, and modern hardware like the ZX-Uno and ZX Spectrum Next. It also covers the Jupiter Ace, Cambridge Z88, Sinclair QL, SAM Coupé, Amstrad CPC and PCW, MSX, ColecoVision, SG-1000, Master System and Spectravideo, with some of these still less complete than the Spectrum.

ZEsarUX is known for its debugging tools, its ZX Desktop interface with many windows and its support for peripherals and storage devices. It is actively developed, and version 13.0 was released in June 2026 for Windows, macOS, Linux, FreeBSD, Haiku and Raspberry Pi. It is open source under the GNU GPL version 3.

## Latest builds

Download these from the web page: https://emulationking.com/other/zxspectrum/emulator/zesarux/#download

- for Windows (legacy): 13.0 (2026-06-09)
- for Windows: 13.0 (2026-06-09)
- for Linux (Ubuntu 24, x64): 13.0 (2026-06-09)
- for macOS (Intel): 13.0 (2026-06-09)
- for macOS (Apple Silicon): 13.0 (2026-06-09)