Foxol vs openMSX

Foxol is an emulator platform for playing classic games across web, mobile, and desktop. It lists support for systems such as Game Boy, Game Boy Color, Game Boy Advance, Nintendo DS, Virtual Boy, WonderSwan, Nintendo 64, Sega Genesis, and PlayStation. Cloud sync lets players continue across devices. Multiplayer options include remote co-op, local multiplayer for up to four players, Link Cable, community-powered Nintendo WFC, and simulated infrared. Gameplay tools include cheats, rewind, save states, and fast forward; users can choose from more than 300 shader presets. Foxol also provides a ROM patcher, save editor, skin builder, and community skin catalog. RetroAchievements features include achievement browsing, live unlock notifications, and per-game challenges; RetroAchievements is an independent third-party service. The free plan costs nothing and allows 20 games, two manual save-state slots and two rotating auto-save slots per game, and 2× fast forward. Foxol Plus costs €3.99 a month or €39.99 a year, with unlimited games and manual save states.

openMSX is a free, open-source emulator for the MSX home computer system, with an aim of 100% accuracy. It emulates almost all MSX, MSX2, MSX2+, and turboR systems, plus some others experimentally. The project lists over 230 machine configurations and over 110 extension hardware configurations. A built-in graphical interface works across supported operating systems. Users can control the emulator with Tcl scripts or a command interface over pipes or a UNIX domain socket, and external applications can connect through that interface. The built-in debugger provides watchpoints, breakpoints, viewers, and real-time data display; save states and a reverse feature support replay or stepping back through time. MIDI connectivity is available through host frameworks on Windows, Mac, and Linux. Downloads include Windows, macOS, Linux, and Android builds, though listed versions differ by platform. Version 20.0 and later requires OpenGL 2 support. Android support is listed only through version 0.15.0, and the default C-BIOS machine does not provide all functionality for a complete MSX machine. Catapult is deprecated; the project recommends its built-in GUI.