- [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B,
- [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A,
- [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE,
- [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START,
- [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP,
- [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN,
- [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT,
- [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT,
- [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C,
- [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y,
- [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X,
- [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z,