jaitro

A minimal libretro frontend with support for multiple cores running simulatanously.

Thank you to nanoarch for providing an educational resource on how to make a libretro frontend.

Running

Run run_tree\jaitro.exe.

Configuration

Use run_tree/jaitro.cfg to these change configuration values:

core "nes/mesen_libretro.dll"

Specify a path to a libretro core DLL. A path to the cores is prepended to your configuration value, so for example the full path above becomes data/cores/nes/mesen_libretro.dll.

rom "nes/assimilate_full_dl.nes|nes/mojon-twins--cheril-the-goddess.nes"

Specify a path to one or more ROMs to load and play, separated by a | character. A path to the ROMs is prepended to your configuration value, so for example the full path above becomes data/roms/nes/assimilate_full_....

Controls

Arrow keys = NES DPAD
X = NES A
Z = NES B
Enter = NES START
Backspace = NES SELECT

From RetroGL.jai:

        cast(Key_Code)(#char "X"), DEVICE_ID_JOYPAD_A);
        cast(Key_Code)(#char "Z"), DEVICE_ID_JOYPAD_B);
        cast(Key_Code)(#char "A"), DEVICE_ID_JOYPAD_Y);
        cast(Key_Code)(#char "S"), DEVICE_ID_JOYPAD_X);
        Key_Code.ARROW_UP, DEVICE_ID_JOYPAD_UP);
        Key_Code.ARROW_DOWN, DEVICE_ID_JOYPAD_DOWN);
        Key_Code.ARROW_LEFT, DEVICE_ID_JOYPAD_LEFT);
        Key_Code.ARROW_RIGHT, DEVICE_ID_JOYPAD_RIGHT);
        Key_Code.ENTER, DEVICE_ID_JOYPAD_START);
        Key_Code.BACKSPACE, DEVICE_ID_JOYPAD_SELECT);

TODO

Audio
Input binding
Scriptability for fun multigame hacks

ROMS

This repository has a few free homebrew NES roms:

See license information here.