作者: Leonard J. Donohoe , Michael J. Cochran
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摘要: A selectively alterable base numerical system in which a calculator implemented few semiconductor chips has keyboard to enter numeric data and command functions be performed on the by circuitry first number base. The results of operations accordance with selected function are then available as way display. Circuitry is provided responsive input change between bases, preferably hexadecimal, octal decimal. three chip where cooperates two ROM manual unit permit operation any several bases at point course operations.