Nemulator
NES and Master System emulator with exact timing
- Open SourceGitHub
- James SlepickaDeveloper
- 2 SystemsSupported
- 8 Oct 2026Page Updated
Details
- Developer
- James Slepicka
- Source Code
- GitHub
- Page Updated
Supported Systems
Platform Support
- Windows
ScreenshotsView All (6)
Overview
Nemulator is an emulator for the NES and the Sega Master System, developed by James Slepicka. It began as an NES emulator and now reaches a high level of compatibility on both systems.
Its NES emulation is mature, with support for the vast majority of the console’s many mappers, unofficial and undocumented CPU opcodes and cycle-accurate timing, which lets it run almost every NES game without problems.
Sega Master System support was added in version 4.0. It is newer than the NES emulation but already works well, making Nemulator worth trying for both systems.
Key Features
Cycle Accurate
Cycle-accurate timing runs almost every NES game.
Mapper Support
Supports the vast majority of NES mappers.
Unofficial Opcodes
Handles unofficial and undocumented CPU opcodes.
Master System
Sega Master System support was added in version 4.0.
