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A bootable NES Emulator running on UEFI

baremetal c emulator gnu-efi nes osdev uefi

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README.md

NesUEFI - A bootable NES Emulator running on UEFI

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. 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.
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)
OVMF (To run on qemu)

Compile and install GNU-EFI Library

Go to gnu-efi source folder

	make
	make install

Here is a guide you can follow for more details on how to compile and install gnu-efi applications.

Compile NesUEFI

Change the following macros in makefile to locate GNU-EFI libraries and headers installed on the previous step.

	INCDIR	= /usr/local/include
	LIBDIR	= /usr/local/lib
	EFILIB	= /usr/local/lib

NesUEFI on qemu :

Locate OVMF in Makefile:

To run the compiled application in qemu we need OVMF for UEFI emulation. OVMF is a port of Intel's tianocore firmware to the qemu virtual machine.

	OVMF_DIR	= ../OVMF

Change OVMF_DIR directory in the makefile.

Create Image

Add your roms here in the makefile to write it to your image. For example : test_1.nes, test_2.nes

	mcopy -i $(IMAGE).img splash.bmp ::
	# Add your roms here
	mcopy -i $(IMAGE).img test_1.nes ::
	mcopy -i $(IMAGE).img test_2.nes ::

	make img

Run

	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 is a list of mapper 0 games.

Super Mario Bros
Popeye
Yie Ar Kung-Fu
Battle City
Super Arabian
Road Fighters
1942
F1 Race

Screenshots

TODO

Graphics
Timer
Keyboard
File System
File Browser
Graphics Library
APU
Mappers
USB Keyboard Driver

Acknowledgements

License

Licensed under the MIT License.