Nestalgia vs Nestopia

Nestalgia is a work-in-progress emulator for NES and Famicom systems, built in Kotlin for Linux, macOS and Windows. It also emulates Famicom Disk System, Dendy, Vs. System, NSF and NSFe, and lists support for 305 mappers. The emulator includes save states, battery saves, overclocking and cheat codes, along with fullscreen display and screenshots. Audio, video, controller and emulation settings are configurable. More than 20 controllers are supported, including the NES Controller, Zapper, Power Pad and Four Score. The project lists passing CPU, video, audio, mapper and input accuracy tests. Windows, Linux and Mac downloads require Java 21 or newer. The project is free and open source under GPL-3.0, with no plan limits stated. Android is listed with an uncertain “Coming soon...or not :(” status. Developers can add its core library through JitPack using Gradle instructions. Nestalgia implements the emulator but does not include debugging tools.

Nestopia has no write-up on Specifiction yet; its figures are above.