**NesUEFI** is a **NES Emulator running without an operating system** directly on **Unified Extensible Firmware Interface (UEFI).** Simply place **NesUEFI** and nes roms in a pendrive and play. **NesUEFI file browser** will show the available roms. The core drivers (Graphics, File System, Keyboard, Timer) are written in c using **GNU-EFI** and the emulator part is a port of [LiteNES](https://github.com/NJU-ProjectN/LiteNES). Adafruit GFX Graphics Library is ported for GNU-EFI ecosystem in C for high level graphics operations and text rendering.
# Compile NesUEFI
## Requirements
- **GNU-EFI** Library. Download it from [here](https://sourceforge.net/projects/gnu-efi/).
- **gcc-3.0 or newer**
- A version of **objcopy** that supports EFI applications
- **qemu** (To run without real hardware)
- **mtools** : Utilities to access MS-DOS disks from Linux (to run on qemu)
Add your roms here in the makefile to write it to your image. For example : test_1.nes, test_2.nes
```makefile
mcopy -i $(IMAGE).img splash.bmp ::
# Add your roms here
mcopy -i $(IMAGE).img test_1.nes ::
mcopy -i $(IMAGE).img test_2.nes ::
```
```bash
make img
```
### Run
```bash
make run
```
# NesUEFI on real hardware
**Do at your own risk. Under no circumstances shall the author be liable for any damage.**
Technically NesUEFI should not mess with your system. But you should at least know what you are doing.
- Format a pendrive with **FAT32** file system.
- Create **/efi/boot/** folders in the pendrive
- Rename **main.efi** to **bootx64.efi** for **64 bit** and **bootia32.efi** for **32 bit** application.
- Copy **bootx64.efi** or **bootia32.efi** to boot folder.
- For **64 bit** application the pendrive should look like this : **/efi/boot/bootx64.efi**
- For **32 bit** application the pendrive should look like this : **/efi/boot/bootia32.efi**
- Simply place your roms in the pendrive. **NesUEFI file browser** will show the available roms.
# Demo on Real Hardware
## Controls
| NesUEFI Key | Keyboard Key |
| ----------- | ----------- |
| Up | W |
| Down | S |
| Left | A |
| Right | D |
| Select | U |
| Start | I |
| A | K |
| B | J |
| Reload | R |
## Known Issues
- Mappers are not implemented yet.
- It does not support Audio emulation yet.
- EFI only have a simple text input protocol. So it only recognizes input character but not keystroke. So key press and release events are emulated by holding down a key until a new key is pressed. Otherwise we can not emulate multi key press events.
- Only single player is supported.
## Tested Games
Below games are currently tested on real hardware. But NesUEFI is not only limited to these games. It should technically run all the classic roms that use mapper 0. [Here](https://nesdir.github.io/mapper0.html) is a list of mapper 0 games.
