binjnes vs NET-NES

binjnes is a free NES emulator written in C, available in a browser or through source builds for Linux and macOS. Its cycle-accurate emulation passes many timing tests and supports numerous cartridge mappers using a built-in cartridge database. Mappers 19, 24, and 26 receive additional audio channels. Playback controls include pausing, advancing one frame, rewinding, and seeking to a specific cycle. Users can save and load battery backup data and emulator state files. The browser version is built as WebAssembly and lets users upload a file to play. Desktop build instructions use make or CMake; building requires CMake and sokol, and the WebAssembly instructions also require Emscripten. The project includes a Python test harness that validates tests with hashes, and the source code is distributed under the MIT License. The GitHub releases page lists no packaged downloads, so desktop users need to build from source.

NET-NES is a free Nintendo Entertainment System emulator written in C# that can run some NES games. Downloadable builds are listed for Windows, macOS, and Linux, including win-x64, win-x86, osx-x64, osx-arm64, and linux-x64. Launching the executable opens a basic graphical interface with options to open a ROM and view the manual. Command-line options include ROM loading, a CPU JSON test, window scaling, an FPS counter, and debug mode. Mapper 0 is supported, while Mappers 1, 2, and 4 are implemented experimentally. The project says it passes nestest CPU instruction tests and lists tested games as working, but some games may glitch or freeze. Its PPU uses scanline timing rather than dot-by-dot timing, so it is not cycle accurate and some games may be affected. A debugger, Mapper 3, player 2 controller support, and audio are listed as upcoming features. The project distributes the software under the MIT License.