This one. T POWER Compatible with 9VAC AC-ONLY: Atari CO17945 400, 800, 810, 850, 1010, 1050, 1200XL Replacement AC Adapter Switching Power Supply Cord Charger https://www.amazon.com/dp/B077PFTXGR/ref=cm_sw_r_apan_i_9Q09V7ZVY64HDA5MCY9G?_encoding=UTF8&psc=1