Hotkeys Action Code Example
Select Hotkey input_enable_hotkey_btn = "6"
Select+Start Exit input_exit_emulator_btn = "7"
Select+Right Shoulder Save input_save_state_btn = "5"
Select+Left Shoulder Load input_load_state_btn = "4"
Select+Right Input State Slot Increase input_state_slot_increase_btn = "h0right"
Select+Left Input State Slot Decrease input_state_slot_decrease_btn = "h0left"
Select+X RGUI Menu input_menu_toggle_btn = "3"
Select+B Reset input_reset_btn = "0"
2 Player Start and Mame Menu are configured through mame menu NOT rgui and retroarch.
\\centipede\configs\all\retroarch-joypads\DragonRise Inc. Generic USB Joystick .cfg
Retroarch Config Files
https://retropie.org.uk/forum/topic/22816/guide-retroarch-system-emulator-core-and-rom-config-files
base retroarch config is here
/opt/retropie/configs/all/retroarch.cfg