KuroganeNES vs NET-NES

KuroganeNES is a free NES and Famicom Disk System emulator that runs from a self-contained HTML file in modern web browsers. Single-player setup involves opening nes.html and loading a ROM, with no installer, plugin, build step, or server. The project describes cycle-accurate emulation modeled on the NES-001 and verified against named test suites across four CPU/PPU clock alignments. It supports 561 mappers and uses CRC32 ROM fingerprints to choose mapper, mirroring, timing, and peripheral settings for thousands of known games. Video and audio include NTSC and PAL timing, composite-video modeling, and expansion audio for listed chips. Features include save states, rewind, fast-forward, local multiplayer, and online multiplayer for two or four players. Supported peripherals include the Zapper, Power Pad, keyboards, tablet, and microphone. Tools include cheats, ROM patching, an NSF player, TAS studio, and CPU/PPU debugging. Remote multiplayer needs Node.js, a TLS certificate, and port 8888 reachable by default.

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.