openMSX review
A specialized, free emulator for MSX users who need control beyond basic gameplay.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
openMSX is an open-source emulator focused on MSX home computers, covering MSX, MSX2, MSX2+ and turboR systems. It also offers experimental emulation for ColecoVision, Spectravideo SVI-318/SVI-328 and Sega SG-1000. The product suits solo users and small teams who want an emulator for classic MSX software, machine configuration work, debugging or scripted control rather than a broad, general-purpose emulation suite.
Its strongest distinction is the depth of its control and inspection features. Save states and reverse execution support iterative work, while the built-in debugger provides watchpoints and breakpoints. Tcl scripting and an external command interface add automation options. Multiple machine configurations and simultaneous machines are available, and the built-in graphical user interface keeps those capabilities accessible through graphical controls. Support for disk, hard-disk, tape and ROM images covers several common MSX media formats, while video scaling algorithms, scanlines, blur effects, and video and audio recording extend its usefulness for presentation and documentation.
openMSX is free and open source, with desktop downloads for Windows, macOS and Linux plus an Android deployment. The published details identify Android 4.1+ support for the 0.15.0 Android package, while desktop downloads are version 21.0. Full emulation of many real MSX machines requires system ROMs; C-BIOS is included for supported default configurations. Choose openMSX if MSX accuracy, debugging, scripting, media handling and configurable machines matter most. Users seeking a less specialized emulator should consider a product with broader system coverage.
openMSX pros and cons
- Where it wins
- Supports MSX through turboR systems and experimental related systems
- Includes reverse execution, breakpoints, watchpoints and Tcl scripting
- Runs on Windows, macOS, Linux and Android with media recording
- Where it doesn't
- Full emulation of many machines requires system ROMs
- Android support details vary by package version
- Its focus is specialized around MSX and related systems
openMSX fact sheet, pricing and score →
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