Javatari vs Virtual Jaguar

Javatari is a free Atari 2600 emulator designed for the Web. Users can load cartridges in a browser, with ROMs opened from local storage, iCloud, Google Drive, Dropbox or web links. It runs in browsers tested with Chrome, Firefox and Safari, and can be installed as a WebApp on iOS, Android or desktop for offline play. Savestates can be exported and shared. Playback controls include adjustable speed, pause and frame-by-frame advance; display tools include resizing, fullscreen, screen capture and debug modes. Customizable joysticks, joykeys and touch controllers are available, with haptic feedback on mobile. NetPlay lets multiple users connect to and control one virtual console over the internet, although it does not work on Apple iOS because required WebRTC technologies are unavailable there. Performance depends on network quality. A JavaScript API supports ROM loading and console control, and games can be embedded in webpages or launched with a Javatari page link. The project repository identifies the software as licensed under AGPL-3.0.

Virtual Jaguar libretro is a free, open-source emulator core for Atari Jaguar cartridges and Jaguar CD media. It is designed to run through a libretro frontend such as RetroArch, not as a standalone emulator. The core emulates the Jaguar’s 68000, GPU, DSP, Object Processor, and Jaguar CD hardware. It accepts cartridge formats including .j64, .jag, .rom, .abs, .cof, .bin, and .prg, plus Jaguar CD CUE, CDI, and CHD images. Console and Jaguar CD BIOS images are embedded, so external BIOS files are not required. Through its frontend, the core supports save states, cheats, rewind, run-ahead, netplay, shaders, controller remapping, and fast-forward. Optional settings include true-color rendering, 2× internal resolution, overclock controls, and adjustable CD read speed. Link-cable emulation supports TCP transport and a multi-peer hub. The project notes that the blitter is not fully cycle-accurate, GPU/DSP pipeline hazards are not modeled, and some titles can run too fast. Listed platforms include Android, iOS, Linux, macOS, web, and Windows.