| 摘要 |
PURPOSE:To constitute an easy-to-operate computer which can calculate a day, month, year, date obyained by combining them, or the period besides decimal calculation. CONSTITUTION:The computer is provided with registrateion keys 2 by which data are inputted and unit keys 4 by which day data, month data, year data, or one of the names of eras is selected, in addition to the key for the assignment of a period and arithmetic keys 5, and the numeral of the result of the calculation of a desired period is displayed on display tube 1 by sequentially operating registratiiion keys 21, unit key 4 and arithmetic key 5. Further, this computer is equipped with registers 6 and 8 in which the date for the calendar calculation and a day coefficient until a day to be calculated are registered, decoders 7 and 9, and ROM11 for perpetual-calendar memorization, and address generator 12 generation the address of ROM117 and comparator 10 comparing the output of ROM11 with that of decoder 7 are both provided. |
