# NES Emulator
This is the repository of a Nintendo Entertainment System (NES) emulator in active development. The emulator is not 
currently complete but can run and partially display a ROM. Note that the project may support Windows and MacOS, but was 
only tested on Linux. Here is how to run the project:
 - Change the ```rom_path``` at line 26 of ```main.c```
 - Optionally, change ```gui.debug_enabled``` to ```true``` at line 33 of ```gui.c``` to enable debugging
 - Generate the Makefile with CMake: ```cmake .```
 - Build the project with Make: ```make```
 - Run the emulator: ```./nes_emulator```

## Controls
 - `P`: Pauses the emulation (CPU)
 - `Ctrl+P`: Pauses the emulation and the PPU rendering
 - `O`: Go to the next palette in the pattern viewer
 - `T`: Show tile IDs
   - `N`: Switch low/high pattern data

## Dependencies
 - GCC compiler
 - CMake
 - SDL

## Development Roadmap
- CPU
   - RAM: Done
   - ROM: Done (iNes 1.0 format only)
   - Official instructions: Done
   - Unofficial instructions: In Progress
- PPU
   - Registers: Done
   - VRAM: Done
   - Background rendering: Done
   - Sprite rendering: To Do
- Input: To Do
- APU: To Do
- Mappers:
   - NROM: Done
   - MMC1: To Do
   - UxROM: To Do
   - CNROM: To Do
   - MMC3: To Do
   - MMC5: To Do
   - ...
- Debug
   - Frame Delay: Done
   - Pattern Table Viewer: Done
   - Nametable Viewer: Done
   - CPU Debugger: To Do
   - Memory Inspector: To Do
   - PPU Debugger: To Do
   - Breakpoints: To Do