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Busicom's engineers came up with a design that required 12 ICs [1]: 263–265 and asked Intel, a company founded one year earlier in 1968 for the purpose of making solid state random-access memory (RAM), to finalize and manufacture their calculator engine.
- Nippon Calculating Machine Corporation, Ltd
- Broughtons of Bristol
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History
The Nippon Calculating Machine Corp was incorporated in 1945 and changed its name in 1967 to Business Computer Corporation, Busicom. Due to a recession in Japan in 1974, Busicom became the first major Japanese company in the calculator industry to fail. Originally, they made Odhner type mechanical calculators and then moved on to electronic calculators always using state of the art designs. They made the first calculator with a microprocessor for their top of the line machinesand they were th...
Microprocessor
In order to limit production cost, Busicom wanted to design a calculator engine that would be based on a few integrated circuits (ICs), containing some ROMs and shift registers and that could be adapted to a broad range of calculators by just changing the ROM IC chips. Busicom's engineers came up with a design that required 12 ICs. In April 1968, engineer Masatoshi Shima was tasked with designing a special-purpose LSI chipset, along with his supervisor Tadashi Tanba, for use in the Busicom 14...
Broughtons of Bristol is a company selling and maintaining a broad line of business machines. They used to buy most of their equipment from Busicom and bought their trade name when they went bankrupt in 1974.
Jan 29, 2018 · Busicom’s design, consisting of twelve interlinked chips, was considered a complicated one. For example, it included shift-register memory, a serial type of memory which complicates the...
Nov 12, 2021 · The Intel 4004 first launched as part of the Busicom 141-PF calculator in mid-1971 (which you can simulate online in your browser). After a contract renegotiation with Busicom, Intel became free to sell the MCS-4 chipset to others.
Their initial proposal had seven ICs: program control, arithmetic unit (ALU), timing, program ROM, shift registers for temporary memory, printer controller and input/output control. [8] Hoff became concerned that the number of chips and the required interconnections between them would make Busicom's price goals impossible to meet.
Nov 16, 2021 · At that point, Busicom was the only customer for the MCS-4 chipset because it had paid for the development of the four ICs. The MCS-4 chips were therefore proprietary, and the world was nearly deprived of the world’s first commercial microprocessor.
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Nov 15, 2023 · Intel’s engineers reduced the 12 integrated circuit design Busicom had come up with to 4 ICs and delivered the finished product in January 1971.
