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NET-NES

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NET-NES's own site

What NET-NES is

NET-NES is a Nintendo Entertainment System emulator written in C# that can run some NES games. It provides downloadable builds for Windows, macOS, and Linux, including win-x64, win-x86, osx-x64, osx-arm64, and linux-x64. Opening the executable brings up a basic GUI with options to open a ROM and view the manual. Command-line options cover loading a ROM, running a CPU JSON test, scaling the window, showing an FPS counter, and enabling debug mode. Mapper 0 is supported, while Mappers 1, 2, and 4 are experimental. The project says it passes nestest CPU instruction tests and lists tested games as working, while warning that games may glitch or freeze. Its PPU uses scanline 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. It is free under the MIT License.

Who it suits

NET-NES may suit NES players and emulation enthusiasts looking for a free emulator on Windows, macOS, or Linux. The project also invites contributors, including newcomers and emulation experts.

What it does well

  • Free software under the MIT License.
  • Builds are listed for Windows, macOS, and Linux.
  • Includes a GUI for opening ROMs.
  • Command-line mode offers debug and FPS options.
  • Project reports passing nestest CPU instruction tests.

What to know first

  • It can run only some NES games.
  • Mappers 1, 2, and 4 are experimental.
  • Some games may glitch or freeze.
  • Its PPU timing is not cycle accurate.

Limits

Mapper 0 is supported, while Mappers 1, 2, and 4 are experimental. The emulator uses scanline timing rather than dot-by-dot timing, and some games may glitch or freeze.

Plans

PlanBilled and limitsPrice
NET-NESFree software under MIT LicenseFree

As github.com lists them, read 4 Oct 2026. The maker's own page has the final word.

Getting started

  1. Open the NET-NES GitHub project page.
  2. Download the build for your operating system and architecture.
  3. Launch the executable to open the graphical interface.
  4. Choose File → Open ROM to load a game, or use the command-line ROM option.

Verdict

NET-NES offers a free, cross-platform way to run some NES games, with both GUI and command-line options. Experimental mapper support and scanline timing may affect compatibility.

Questions

How much does NET-NES cost?

NET-NES is free software under the MIT License.

Which platforms does it support?

It supports Windows, macOS, and Linux. Listed builds include win-x64, win-x86, osx-x64, osx-arm64, and linux-x64.

Does NET-NES have a graphical interface?

Yes. Launching the executable opens a basic GUI with File → Open ROM and Help → Manual.

Which NES mappers are supported?

Mapper 0 is supported. Mappers 1, 2, and 4 are implemented experimentally.

Is NET-NES open source?

It is distributed under the MIT License, which permits use, copying, modification, and distribution subject to its conditions.

How can users report bugs or contribute?

The project directs users to open issues for bugs or feature requests and welcomes contributions through pull requests.

Facts from NET-NES's own pages

Accuracy limitation
The PPU uses scanline timing rather than dot-by-dot timing, so the emulator is not cycle accurate and some games may be affected. · github.com, 4 Oct 2026
Compatibility
The README says it passes nestest CPU instruction tests and lists many tested games as working, while noting some games may show glitches or freeze. · github.com, 4 Oct 2026
Downloads
The project lists downloadable builds for win-x64, win-x86, osx-x64, osx-arm64, and linux-x64. · github.com, 4 Oct 2026
Integration
The project says it uses raylib-cs, with Rlimgui-cs and ImGui.NET also used for its GUI. · github.com, 4 Oct 2026
Intended audience
The maker says the project is freely available to contributors including emulation experts, Nintendo fans, retro enthusiasts, and newcomers. · github.com, 4 Oct 2026
Interface
Launching the executable opens a basic GUI with File → Open ROM and Help → Manual. · github.com, 4 Oct 2026
License
The software is distributed under the MIT License, which permits use, copying, modification, and distribution subject to the license conditions. · github.com, 4 Oct 2026
Maker location
The maker's GitHub profile lists Toronto, Canada. · github.com, 4 Oct 2026
Mapper support
Mapper 0 is supported; Mappers 1, 2, and 4 are implemented but described as experimental. · github.com, 4 Oct 2026
Planned features
The listed upcoming features include a debugger, Mapper 3, player 2 controller support, and audio. · github.com, 4 Oct 2026
Purpose
NET-NES is a Nintendo Entertainment System emulator written in C# and capable of running some NES games. · github.com, 4 Oct 2026
Support and feedback
The README directs users to open issues for bugs or feature requests and invites contributions through pull requests. · github.com, 4 Oct 2026
Terminal options
The command-line options include loading a ROM, running a CPU JSON test, scaling the window, showing an FPS counter, and enabling debug mode. · github.com, 4 Oct 2026

Where NET-NES stands on Freedom251

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