Emu198x vs SMS

Emu198x is a free, open-source emulator suite for running vintage computers and consoles through JSON scripts or an MCP client. Its registry lists 30 machines, with boot captures available for 29. Scripts can automate actions such as advancing frames, querying a CPU register, and saving a screenshot; documentation also describes capturing frame sequences and audio. Each machine binary can act as an MCP server, exposing tools to run frames, inspect state, handle input, and capture output. Clients connect over standard input and output using JSON-RPC. The maker says repeating a script produces an identical report and byte-for-byte matching screenshot. Release archives are provided for Windows, Linux, and macOS, including separate Apple silicon and Intel Mac builds. Emu198x does not supply commercial ROMs, firmware, disks, tapes, or cartridges, so users must provide required files. The accuracy page reports crate counts and boot-capture status rather than percentages or maturity scores, and SHA-256 sums are available to check downloads.

SMS is a free, open-source Sega Master System emulator written in Go for Linux. Its source repository is public on GitHub and described as MIT licensed. The emulator provides complete Zilog Z80 emulation and is described as concurrent. Graphics use an SDL backend with a 2x scaler and fullscreen support. Keyboard controls map the arrow keys to joypad directions, X to Fire 1, and Z to Fire 2. The README documents a Go installation command and shows launching an SMS ROM with the supplied executable. Sound support is listed as a project todo, and writing more tests is also listed as a todo. The stated free and open-source plan costs nothing. The project is focused on Sega Master System emulation, with the listed display and keyboard controls defining its documented user-facing operation.