With poor prospects for employment in the field of chemistry, he went to work for Busicom, a business calculator manufacturer.
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Following Marcian "Ted" Hoff's initial conception, formulated in 1969, Shima later helped design the 4004 processor, working at the Intel offices for six months- from April until October 1970- with Federico Faggin, the project leader.
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However, according to Shima himself, the logic was first tested on breadboards using TTL chips, before being manually translated into MOS transistor equivalents.
Credited along with Faggin, Hoff, and Masatoshi Shima of Busicom as co-inventor, Mazor helped define the architecture and the instruction set for the revolutionary new chip, dubbed the Intel 4004.
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He was one of the co-inventors of the world's first microprocessor, the Intel 4004, together with Ted Hoff, Masatoshi Shima, and Federico Faggin.
Metcha! Taiko no Tatsujin DS: Nanatsu no Shima no Daibouken | George Shima | Shima Uta | Shima Sakon | Masatoshi Shima | Shima Iwashita | Shima | Masatoshi Ōkōchi | Masatoshi Abe | Kōzu-shima | Kiyohide Shima | Hotta Masatoshi |