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- The project traces its history to 1969, when Busicom Corp. approached Intel to design a family of seven chips for an electronic calculator, three of which constituted a CPU specialized for making different calculating machines. The CPU was based on data stored on shift-registers and instructions stored on ROM (read-only memory).
en.wikipedia.org/wiki/Intel_4004
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Busicom Co., Ltd. (ビジコン株式会社, Bijikon Kabushiki-gaisha) was a Japanese company that manufactured and sold computer-related products headquartered in Taito, Tokyo. It owned the rights to Intel's first microprocessor, the Intel 4004, which they created in partnership with Intel in 1970.
It included a central processing unit (CPU) chip—the 4004—as well as a supporting read-only memory (ROM) chip for the custom applications programs, a random-access memory (RAM) chip for processing data, and a shift-register chip for the input/output (I/O) port.
Intel 4004 CPU and associated chips on the circuit board from a Busicom calculator. The result of the discussions between Intel and Busicom was an architecture that reduced the 7-chip Busicom design to a 4-chip Intel proposal composed of CPU, ROM, RAM and I/O (input-output) devices.
4003, 10-bit shift register. 4004, 4-bit central processing unit (CPU) (the microprocessor) with a maximum clock speed of 750 kHz. Complete 4004 chip-sets were sent to Busicom early in 1971 and by March Shima had built a working 141-PF calculator.
Nov 12, 2021 · The First Commercial Single-Chip Microprocessor. In 1969, a Japanese calculator manufacturer called Busicom hired Intel to create chips for a calculator that Busicom designed.
Jul 2, 2018 · The Intel 4004 was the world’s first microprocessor—a complete general-purpose CPU on a single chip. Released in March 1971, and using cutting-edge silicon-gate technology, the 4004 marked the beginning of Intel’s rise to global dominance in the processor industry.
Nov 15, 2021 · Intel engineer Federico Faggin was on the team that designed the Intel 4004 microprocessor, which made its debut in November 1971. Masatoshi Shima was an engineer with Nippon Calculating Machine Corp., the Japanese firm that designed the Busicom 141-PF printing calculator.
