rNES it's yet another NES emulator which has as it main goals:

• Accuracy to real hardware
• Low memory footprint
• High portability across platforms

Currently rNES implements mappers 0, 1, 2, 3 and 7, supporting thousands of NES games.

Fig. 1: rNES

Currently only a posix system with lib SDL is supported. On a Debian family system, make sure to install the following packages:

• libsdl2
• libsdl2-ttf

rNES can be built by calling make:

cd src
make

To run rNES just call:

./rNES <rom_file>

The following options are supported:

Use: ./rNES [-s <scale_factor>] [-d] [-h] <rom_file>

    -s, --scale      Set screen scale factor (default: 2)
    -d, --debug      Show debug messages (it can be extremely slow!)
    -i, --info       Just show ROM information (don't play the game)
    -v, --version    Show version
    -l, --license    Show license
    -h, --help       Show this help

rNES provides an easy to use PalleteEditor that can be found in tools/PaletteEditor. The tool be built with cmake (Qt6 is required):

cd tools/PaletteEditor/
cmake .
make
./PaletteEditor

The tool is straightforward to use, you can create a new palette or load an existent one (.pal file, no headers, just a sequence of RGB color data for all 64 entries). Just click on the squares to change the color.

Fig. 2: PalleteEditor interface.