I Ianuari 1981, MOS Technology, Inc., Commodore's integrated circuit design subsidiary, amataina se poloketi e mamanuina ai ata ma leo chips mo se isi augatupulaga vitio taʻaloga faʻamafanafana. O le mamanu galuega mo le chips, faʻaigoaina MOS Tekonolosi VIC-II (Vitio Integrated Circuit mo ata) ma MOS Tekonolosi SID (Sound Interface Device mo leo), na maeʻa ia Novema 1981. Commodore ona amataina lea o se taʻaloga taʻaloga poloketi o le a faʻaaogaina ai le chips fou <unk> taʻua o le Ultimax poʻo le Commodore MAX Masini, inisinia e Yash Termi mai Commodore Iapani. O lenei poloketi na faʻamutaina mulimuli ane ina ua na o ni nai masini na gaosia mo le maketi a Iapani. I le taimi lava e tasi, Robert "Bob" Russell (faʻataʻitaʻiga ma le faʻataʻitaʻiga i luga o le VIC-20) ma Robert "Bob" Yannes (faʻataʻ
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