GPC feedback: drawing on the Cronus Zen OLED and using controller LEDs and rumble
How a Cronus Zen script tells the player what it is doing: the 128 by 64 OLED functions (cls_oled, print, rect_oled, puts_oled), the dirty-flag redraw pattern, controller LED states with set_led and set_ledx, DualShock 4 light bar colours, rumble overrides, and returning control to the console.
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