JSNES vs My NES

JSNES is a free JavaScript library for emulating NES games in browsers and Node.js. Its Browser helper handles canvas rendering, audio, keyboard and gamepad input, and frame timing; the lower-level NES class allows custom rendering and audio handling in Node.js. ROM data can be loaded from a URL or from a string, Uint8Array, or ArrayBuffer. The API runs frames, accepts controller input for either player, resets, adjusts frame rate, and includes methods for moving and triggering the Zapper. Applications can serialize and restore emulator state with `toJSON()` and `fromJSON()`. The `onBatteryRamWrite` callback lets an application capture battery-backed SRAM writes for persistent game saves. Sound emulation is enabled by default, with a default sample rate of 48000 Hz, and an audio callback is available. The README provides npm installation for Node.js or Webpack and an unpkg script for browser use, as well as a React embedding example. JSNES is licensed under Apache-2.0; its GitHub Issues tracker accepts bug reports and feature requests.

My NES is a portable, open-source NES and Famicom emulator for Windows, written in C#. It emulates NES processing, supports NTSC, PALB and DENDY formats, and implements about 97% of known documented mappers. The project says it passes most known hardware behavior tests, although some games may fail because of an unimplemented mapper or emulation bug. A built-in launcher organizes games, shows information from NesCart DB, and records ratings and play time. Users can save and load states, take snapshots, record game audio and use Game Genie. Four-player joypads work through a keyboard, joystick or Xbox 360 controller. Video can be upscaled beyond Full HD. The emulator is multithreaded, and the project reports 60 fps on older Windows machines. My NES is.NET freeware under GNU GPL version 3, listed at free. It usually runs after extracting a portable package and stores settings and user files in Documents. Requirements include.NET Framework 4, DirectX and Microsoft C++ Runtime.