Javatari vs kat5200

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.

kat5200 is a free emulator for playing games from Atari 5200 and Atari 8-bit computer systems on a personal computer. It supports Atari 5200, Atari 400, Atari 800, Atari 800 XL and Atari 800 XE systems, with builds listed for Windows, macOS, Linux and Android. The emulator does not include game ROM images or BIOS files, so users must obtain and configure them separately. Controls can use a game controller, keyboard or mouse, and multiple input entries can be assigned to an emulated function. Users can save different input profiles and assign them to games in the Launcher. The Simulate Analog option can help when a game expects controller-axis positions but the player uses a keyboard or digital controller. Initial setup offers ROM-directory scanning and options for trackball, paddle and two-stick games. Version 1.0.0 uses TOML configuration and adds per-ROM profiles. The Android version is provided as an APK, not through the Play Store, and must be sideloaded.