JPS5916306B2 - calculator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a calculator, and more particularly to a calculator equipped with date input means.

The input order of [year, month, and day] in conventional date input differs depending on the customs of each country around the world, but in Japan, it is generally Showa (era name) ○○ year ○○ month 0○ day, or year 0○. ○○ January 0○ day is 0○ month ○ 1st 0○○○ in the United States and Europe.
The year (Western calendar) is commonly used in the UK, and the year 0○ old January ○○○0 is generally used, and the above four input order patterns are used worldwide.

By the way, in conventional calculators and other calculators that can calculate dates and number of days, the input order of [year, month, and day] is fixed to one of the four above-mentioned numbers. When using it to calculate dates, number of days, etc., it may be easy for people in one country to use it, but it may be very difficult for people in other countries to use it. As in an office, the date entry order may be American, European, British, or Japanese, depending on the office.
Among them, some used the era names, while others used the Western calendar, causing considerable inconvenience to users.

In order to eliminate this inconvenience, the present invention provides a computer that allows input in any of the various input orders described above. The present invention will be explained below based on Examples.

The figure is a circuit diagram for explaining the operation of the calculator according to the present invention. In the figure, 1 indicates a selection switch for selecting an input order setting position for inputting arbitrary date inputs in the above-mentioned order. 1 is provided with four positions 1334 corresponding to the following input order, and the positions 1334 can be arbitrarily selected.

(Position) (Input order) □ ○0 year ○○ month ○○ day (Showa era) □ ○○○ 0 year 0○ month 01 (Western calendar) 301 month 0○ day 0○0○ year (Western calendar) 3○○ Day ○○ month ○○○○ year (AD) 2 is a flip-flop group consisting of four flip-flop knobs F1 to F4 provided corresponding to each position to indicate the state of the selected position of switch 1; 3
is a key input device for inputting arbitrary information, and 4 is a C key input device.
PU (Center Process Unit)
, 5 is a read tree memory (ROM) that stores sequences for causing the CPU 4 to perform predetermined calculations and controls.
), 6 is an accumulator (AR) including memory), 7 is a register for storing data (BR), G1 to G6 are gates, and a is an accumulator 6
b is a command signal line for transferring the contents of register 7 to accumulator 16, c is a command signal line for generating data in accumulator 16, and d is a command signal line for storing data in accumulator 16. 6 is a command signal line for adding the contents of register 7 to register 7, e is a command signal line for storing the contents of accumulator 16 in register 7, and f is a command signal line for shifting the contents of accumulator 6 to the right. line, g is the accumulator -6
h is a command signal line for shifting the contents of accumulator 16 to the left, and h is a command signal line for storing the lower four digits of the contents of accumulator 16 in the register.

Although the outline of the circuit diagram of the computer according to the present invention has been explained above,
The feature of the present invention is that regardless of whether the input order selection position for switch 1 is set to 1 to 4, the data format immediately before date and day calculations are performed in the computer is ○○ month ○○. The data structure is based on the date 0000 (Western calendar).

As an example, if the selection position of switch 1 is set to 1 and the data [November 28, 1975] is entered through key input device 3, this will be converted to November 28, 1975 as described above. The operation of the logic circuit will be sequentially explained according to Table 1.

First, when you press 65011287 on the numeric key of the key input device 3 in the order shown, the numeric data of the key input device 3 is transferred to the accumulator 16 according to the command line a from the CPU 4.
(Table 1 (1)).

Next, press the date input key “Date” on the key input device 3.
or 6 Days'') is pressed, the CPU 4 first determines that the state of switch 1 is 1 from the fact that flip-flop F1 of flip-flop group 2 is set, and converts the data from the format of [00/00/00]. [00JB
J. Specify the starting address of ROM5 where the sequence of instructions to convert to the form 00E10 (00 years) is stored,
Thereafter, according to the sequence stored in the ROM 5, signals are sent from the CPU 4 to each command line. To explain the sequence below, first, the gates G6 and G3 are operated by command lines B and e from the CPU 4, and the contents of the accumulator 16 and the register 7 are converted (Table 1 (2)). Followed by CP
According to command line c like U4, data 619250000'' based on the difference between the Western calendar and the Showa era is stored in the storage unit 16.
(Table 1 (3)). Furthermore, the gate G2 is operated by the command line d from the CPU 4, and the contents of the register 7 are added to the contents of the accumulator 16 (Table 1 (4)
). Next, by command line e of CPU4, gate G is
3 operates and the contents of accumulator 16 are transferred to register 7.
(Table 1 (5)). Subsequently, the gate G4 is operated by the command line f from the CPU 4, and the contents of the accumulator 16 are shifted to the right by four digits (Table 1 (6)).
Next, the gate G is controlled by the command lines B and e of the CPU4.
6, G3 operates and accumulator 6 and register 7
The contents of are exchanged (Table 1 (7)). Next, CPU4
The gate G5 is operated by the next command line g, and the contents of the accumulator 16 are shifted to the left by 4 digits (Table 1 (8)
). Next, the gate G is controlled by the command line d from the CPU4.
2 operates and the contents of register 7 become accumulator 16.
(Table 1 (9)). With the above procedure, the input data for November 28, 1975 will be 11
The data is converted into data of month 28, 1975, and stored in the storage unit 16.

The above explanation is based on the case where switch 1 is set to position 1, but when it is set to position 2, after data is stored in accumulator 6, ), the procedure shown in Table 1 can be followed, and if position 3 is set, data is input in a predetermined input order from the beginning, so the conversion shown in Table 1 is not necessary.

If it is set to 4, the procedure shown in Table 2 can be followed.

(The explanation is omitted because it is the same as that in Table 1.) As explained above, the computer according to the present invention is provided with a selection switch for selecting the manual order of data} b1 Each flip-flop corresponding to the position indicated by this selection switch From the set state, the CPU built into the computer specifies the starting address of the ROM where each data conversion sequence is stored, and outputs a signal to each command line according to the sequence in the ROM to convert the input data. This is extremely convenient in practice as it converts the data into a predetermined manual order.

[Brief explanation of the drawing]

The figure is a circuit diagram for explaining the operation of the computer according to the present invention. 1... Input order selection switch, 2...
Flip-flop group, 3...Key input device, 4
...CPU, 5...ROM16...
...Accumulator 7...Register,
G, ~G6...Gate.

Claims (1)

[Claims] 1. Selection means for selecting the input order of date input data when calculating the number of days or date; and rearrangement means for rearranging the input order of the date data selected by the selection means into a predetermined order. What is claimed is: 1. A calculator characterized in that it is provided with the following functions, and is capable of calculating the number of days or the date in any order of date input data.