Ni January 1981, MOS Technology, Inc., Commodore ká Integrated Circuit oniru subsidiary, bẹrẹ a ise agbese lati se agbekale awọn aworan ati ohun eerun fun a iran ti nbọ fidio ere console. Design ise fun awọn eerun, lorukọ MOS Technology VIC-II (Video Integrated Circuit fun aworan) ati MOS Technology SID (Sound Interface Device fun ohun), ti pari ni Kọkànlá Oṣù 1981. Commodore ki o si bẹrẹ a ere console ise agbese ti yoo lo awọn titun eerun <unk>called awọn Ultimax tabi awọn Commodore ẹrọ MAX, engineered nipa Yash Termi lati Commodore Japan. ise agbese yi ti a nipari fagile lẹhin ti o kan diẹ awọn ẹrọ ti a ti ṣe fun awọn Japanese oja. Ni akoko kanna, Robert "Bob" Russell (sistem ati onise on VIC-20) ati Robert "Bob" Yannes (oludari ti awọn SID) tẹsiwaju lati se agbekale awọn aworan ati awọn ohun elo ti o jẹ pataki fun awọn oniwe-iṣẹ ti o wa lọwọlọwọ ti awọn oniwe-ọran ti o ni kikun, ti a
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