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The Calculator-on-a-Chip (2015)
Arrival of the "Calculator-on-a-Chip" During the late 1960s and early 1970s a major aim of the calculator electronics companies was to integrate all of the functionality of a calculator into one integrated circuit, so producing a "Calculator-on-a Chip". © 2015 Nigel Tout This is a new article which was not originally in "The International Calculator Collector".
A few months before the announcement of the Mostek MK6010 the journal "Electronics" had reported[4]:"Like many MOS circuit makers, the Dallas company[Texas Instruments] is working to reduce the number of chips for a calculator set. The totally programmable TI device consists of a 3520-bit read-only program memory, a 182-bit RAM, a decimal arithmetic logic unit and control, timing and output decoders, all on a 230-by-230-mil[thousands of an inch] chip." Royal Digital III, showing its unusual stylus keypad, 4-digit Vacuum Fluorescent Display (VFD), and GI 250"calculator-on-a-chip", here date-coded to 1972, week 8.
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