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12 ICs
- 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.
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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.
The single chip, using a p-channel semiconductor process, replaced 22 chips in the original Busicom Junior desktop calculator and reduced the number of circuit boards from two to one in the new version Busicom Junior. Note that separate transistors were still needed as high-voltage display drivers.
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.
Jan 29, 2018 · In April 1969, Japanese company Busicom hired them to do LSI (Large-Scale Integration) work for a family of calculators. Busicom’s design, consisting of twelve interlinked chips, was considered...
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.
The magazine "Electronics" for Feb 1st. 1971 says: "Mostek produced the first calculator on a chip for Busicom Corp. The 180-mil-square [0.18 inches-square (4.6 mm-square)] chip contains the logic for a four function 12-digit calculator - more than 2,100 transistors in 360 gates plus 160 flip-flops.
