Fami is a NES emulator written in C#. The name is derived from the Japanese model of the NES, the Family Computer or Famicom.
The main goal was to build a fast NES emulator with sound in C#.
When running in Debug mode, the emulator manages around 40-50 fps, but runs full speed when running in Release mode on a Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz.
- .NET 5 SDK
- Visual Studio 2019 v16+
- Zapper/Light-gun support
- Support for using controllers
- Save/Load States (only slot 1 right now)
- Rewind (up to 8 seconds)
- Button mapping through a configuration file
- Menus and dialogs
- Implement more mappers
- Fullscreen
fami.exe "<path to rom>"
The mappings don't use Space or Enter or Escape since Steam maps the controller to these buttons.
| Key | Function |
|---|---|
| Up | D-Pad Up |
| Down | D-Pad Down |
| Left | D-Pad Left |
| Right | D-Pad Right |
| V | Start |
| C | Select |
| Z | Button A |
| X | Button B |
| R | Reset |
| F2 | Save State |
| F4 | Load State |
| Backspace | Rewind |
- NROM (000)
- MMC1 (001)
- UxROM (002)
- MMC3 (004)
- AxROM (007)
The PPU is a port of the C++ PPU used in One Lone Coders NES Emulation Tutorial and retains all the comments.
The APU is taken from the BizHawk NES APU found here: https://github.com/TASVideos/BizHawk/blob/master/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/APU.cs
I decided to use it as it gave the best audio output.
It uses blargg's blip_buf library to effectively generate samples that are timed against an emulation clock (it coincides with every tick of a CPU cycle) which greatly simplifies synchronization of audio.
If you move the mouse immediately after firing, the sensor position will move, causing your aim to be off from where you clicked.
Right-clicking to trigger "outside" of the screen kind of works. It's good enough for game mode selection screens, but doesn't work well during actual gameplay. It still registers as a trigger "inside" the screen. This is probably caused by timing issues.