Fearless-NES is a work-in-progress Nintendo entertainment system emulator written in Rust.
- Cycle-accurate CPU emulation
- Accurate PPU emulation
- Mostly cycle-accurate, but has some timing bugs
- Good APU emulation
- Uses the blip buffer
- Basic mapper support
- Basic GUI
- currently using egui
- the code is a bit of a mess currently
- immediate-GUI seems to be great for simple data visualization or simple GUIs, but making a full app with it is quite cumbersome
- Save states
- Gamepad support
- Controllable overscan
- Game loading using the NES 2.0 XML Game Database
- Custom key bindings
- Build with
cargo run --profile=release-ltoand enjoy !
For accuracy tests, see TESTS.md. Run these with 'cargo test'.
| Mapper | Example Games |
|---|---|
| 0 (NROM) | Super Mario Bros, Donkey Kong, Balloon fight |
| 1 (MMC1) | Final Fantasy, Legend of Zelda, Mega Man 2 |
| 2 (UxROM) | Castlevania, Mega Man, Contra |
| 3 (CNROM) | Solomon's Key, Arkista's Ring |
| 4 (MMC3)* | Kirby's Adventure, Mega Man 3-6, Ninja Gaiden II: ... |
| 7 (AxROM) | Battletoads, Jeopardy! |
| 69 (FME-7) | Batman: Return of the Joker, Gimmick! |
- Some MMC3 games have graphical glitches.
With these mappers, Fearless-NES should support 84 % of commercial NES games.
-
(frontend) user-defined RGB palettes
-
(frontend) NTSC / xBRZ filters
-
(core) iNES 2.0 support
-
(core) advanced mappers such as MMC5, VRC2/4...
-
(core) various accuracy tests
| NES controller | Keyboard |
|---|---|
| A | F |
| B | D |
| Select | Space |
| Start | Enter |
| Up | ArrowUp |
| Down | ArrowDown |
| Right | ArrowRight |
| Left | ArrowLeft |
