JPS5935475B2 - Print control method - Google Patents

Description

[Detailed Description of the Invention] The present invention combines recording display using a printing device (printer) and non-recording display using a visible display device (hereinafter referred to as a display device) such as a printing diode, a fluorescent display tube, or a liquid crystal display panel. Concerning print control methods for desktop electronic computers.

A computer equipped with both a printing device and a display device is configured so that it is possible to set a non-printing state and suppress the printing operation by operating the keyboard, especially in calculations that do not require record display output. There is.

However, in conventional computers of this type, printing/non-printing was only controlled by keyboard operations.

Therefore, if an operation such as printing state → non-printing state - printing state is performed in a series of calculations, the calculation process for the non-printing state in the middle is not recorded in the record display, so even if you check, the answer will not match. Various problems arise, such as not being able to do so. A simple example of this problem is Koro □ = Tsukuda □ Tada When keyboard input and print control input are operated, the display device is in the printing/non-printing state as shown in Table 1 and Figure 6. Each time it is operated as 2+, 3+, 4+ without being affected by
The results are displayed as 2, 5, 9.

However, the printed records are 2+, 4+, 9*, and the total is 9. In this case, if you look only at the print result, it is 2.
This creates a misunderstanding that the sum of 4 and 4 is 9. Table 1Also, in a simple case like this example, the answer can be found by mental calculation, but in the case of a complex calculation with a large number of digits, it becomes difficult for anyone other than the operator to discover the problem. .

This is a problem caused by the fact that the print/non-print control performed during calculation did not remain in the print results.

The object of the present invention is to detect the printing/non-printing state transition and display a predetermined record, that is, record display that identifies the state transition and also records and displays information stored in a storage device (register) as necessary. The purpose of this invention is to provide a printing control method that enables printing. Next, the present invention will be illustrated in detail using the drawings.

FIG. 1 is a block diagram of an electronic desk calculator for explaining an embodiment of the present invention, and numeral 1 controls the printing/non-printing state.
This is a printing system (goods) input, and printing/non-printing corresponds to logic 1/logic 0, respectively.

16 is the output of the detection circuit 2 which detects the state transition of the print-non-print and non-print → print inputs of the print control input 1;
The arithmetic control system 4, which will be described later, is instructed to print a state transition (for example, "print all digits with decimal points") to clarify the state transition of the print control input 1.

3 is a keyboard input consisting of numeric keys and four arithmetic operation keys.

The aforementioned inputs 3 and 16 are processed by an arithmetic circuit 6 controlled by an arithmetic control circuit 5 and stored in a register 7.

The arithmetic control circuit 5, the arithmetic circuit 6, and the register 7 constitute the arithmetic control system 4.

The display control device 10 displays the display data of the register 7 on the display device 11. The printing control device 8 controls printing of the printing device 9 which prints the printing data of the register 7. If a print control signal 17, which will be described later, indicates that printing is possible (logic 1), the print data in the register 7 is printed, and if printing is not possible (logic 0), no printing is performed. The detection device 2 detects the state transition of the print control input 1 between the printing mode and the non-printing mode, and its general configuration is shown in FIG.

It consists of a gate circuit 13 and an OR gate 14 which receive the print control input 1 and the output of a flip-flop 12 which stores the print control input by a write signal 15 sent from the arithmetic control system 4. The gate circuit 13 is a gate for detecting that the print control input 1 and the output of the flip-flop 12 are different, and can be constructed of a simple gate such as an exclusive OR gate, an example of which is shown in FIG.

When the flip-flop amplifier 12 writes the print control input 1 with the write signal 15, it outputs the same logic signal as the print control input 1 at its output, and holds that output until it writes with the next write signal.

At this time, since the print control input 1 and the output of the flip-flop 12 are the same signal, the output 1 of the gate circuit 13/
6 becomes logical 0.

When the state of the print control input 1 changes, the output 16 of the gate circuit 13' becomes logic 1 because the output of the flip-flop 12 storing the logic signal before the transition differs from the print control input 1.

In this way, the state transition of print control input 1 is detected.

Gate output 16 is print control input 1 for arithmetic control system 4.
This command commands printing (in this example, printing of all digits with decimal points) to clarify that the state has changed (hereinafter referred to as state transition printing command).This command is issued to the arithmetic control circuit 5 and the arithmetic control circuit. The print data corresponding to "all digits and decimal point" is processed by an arithmetic circuit 6 controlled by 5 and stored in a register 7. The hardware of the arithmetic and control system 4 can be constructed in any manner desired by an expert in the relevant technical field, and since nothing special is required, it is simply shown as a block diagram. The print control signal 17, which is the output of the OR gate 14, is "printable" regardless of the print control input 1 while the state transition print command is issued, so the print control device 8 sends the print device 9 to print all digits. Print the decimal point ゜゛.

After printing is performed to clarify the state transition of the print control input 1 as described above, the signal 15 for writing the logic signal of the print control input 1 after the state transition is sent from the arithmetic control system 4 to the flip-flop. Write to flop 12.

Since the flip-flop 12 and the print control input 1 have the same signal, the output of the gate circuit 13' becomes logic 0, canceling the above-mentioned print command. Next, a specific example will be explained with reference to Table 2 and FIG. 7. Print control input 1 is in print mode (logic 1) and flip-flop 12 of detection device 2
is a write signal and is in a state where a logic 1 is written.

When 2+ is input from the keyboard 3, the arithmetic control system 4 processes the data and stores the print data of "2+" and the display data of "2" in the register 7, and the print control device 8 indicates that the or/game port 4 can print (logical 1), printing is performed on the printing device 9, and the display control device 10 displays on the display device 11. Next, when the print control input 1 is switched to the non-print mode (logic 0), the flip-flop 12 retains the data logic 1 before the transition of the print control input 1, so the gate circuit 13! The output becomes logic 1, detects the state transition of the print control input 1, and issues a print command to the arithmetic control system 4 to clarify the state transition.

The print data of "all decimal places" processed by the arithmetic control system 4 is stored in the register 7. Since the output of the OR gate 14 is logic 1, the print data of 1 full digit decimal point is printed by the printing device 9 controlled by the printing control device 8.

After this printing is completed, the arithmetic control system 4 sends the flip-flop 12 to the data logic 0 of the print control input 1 after the state transition.
is written, the inputs of the gate circuit 1y become equal, and the print command due to the state transition is canceled. The output of the OR gate 14 also becomes logic 0, inhibiting printing of print data.

Next, when 3+ is input, the display data shows 5, but printing is prohibited as described above and is not printed.

Next, when the print control input 1 is set to the printable mode (logic 1), the gate circuit 1 detects the state transition, prints all decimal places, and writes logic 1 to the flip-flop 12. 14 becomes logic 1, and printing becomes possible again.

Next, FIG. 4 is a circuit connection diagram of the detection circuit 2 in another embodiment of the present invention, and the gate circuit 13'' detects that the print control input 1 has transitioned from the print mode to the non-print mode.

The condition for this gate circuit 13'' to be logic 1 is that the current print control input 1 is logic 0 (=non-print mode);
A flip button that memorizes the mode of print control input 1 before transition.
When the flop 12 is at logic 1 (=print mode), that is, when the print control input 1 transitions from the print mode to the non-print mode, the output 16 of the gate circuit 13'' of the detection circuit 2 becomes logic 1 and the arithmetic control system 4 Print command 16 to print that the print control input 1 has transitioned from print mode to non-print mode.
command. “All digits decimal point” (・・・・・・・・・・・・
...), "Display data (2・S),""All digits with decimal point" (...) are printed. That is, printing examples are shown in Table 3 and FIG. 8. However, 2.S indicates that the subtotal is 2. FIG. 5 is a circuit connection diagram of the detection circuit 2 in still another embodiment of the present invention, in which the gate circuit 13''5 detects that the print control input 1 has transitioned from the non-print mode to the print mode.

The condition for the output 16 of this gate circuit 13''2 to become logic 1 is that the current print control input 1 is logic 1 (=print mode), and the mode of print control input 1 before the transition is memorized. Flip-flop 12 is logic 0 (=non-printing mode)
, that is, when the print control input 1 transitions from the non-print mode to the print mode, the gate circuit 1 of the detection circuit 2
3'' output 16 of 1 is logic] and issues a print command 16 to the arithmetic control system 4 to print that the print control input 1 has transitioned from the non-print mode to the print mode.

Printing is performed using "゜display data" (5.S), "memory data゜" (0.M), and one-digit paper feed. That is, printing examples are shown in Table 4 and FIG. 9. The print control signal 17 of the detection circuit 2 shown in FIG. 5 is directly output from the print control input 1, and a gate corresponding to the OR gate 14 is not required for the following reason. When the printing device 9 prints by keyboard input, the print control input 1 is in the print mode (= logic 1), and when printing the transition of the print control input 1, the print control input 1 is in the print mode (= logic 1). 1). In this way, when the printing device 9 prints, the print control input 1 is always in the print mode. For this reason, it is possible to use the print control input 1 as the print control signal 17, and the gate corresponding to the OR gate 14 performs printing to make it clear that the mode has transitioned from the non-print mode to the print mode, as in this embodiment. Not necessary in some cases. According to the present invention, as is clear from the above explanation, it is possible to perform predetermined printing at a predetermined state transition between printing mode and non-printing mode, and when reviewing the results of printing calculations that have already been made, it is possible to perform calculations by switching the printing control. are easily identified and very useful.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electronic desktop calculator for explaining the present invention, FIG. 2 is a circuit connection diagram showing the general configuration of the detection device 2, and FIGS. Circuit connection diagrams showing specific examples of the detection device 2 in each embodiment of the invention, and FIGS. 6 to 9 are diagrams showing specific printing examples, respectively. 1...Print control input, 2...Detection circuit, 3...Keyboard input, 4...Calculation control system, 5...Calculation Control circuit, 6...
Arithmetic circuit, 7...Register, 8...Printing control device, 9...Printing device, 10...
・Display control device, 11...Display device, 12...
... flip flop, 13, 13', 13'',
13'7...Gate circuit, 14...OR gate, 15...Write signal, 16...
...State transition print command, 17...Print control signal.

Claims (1)

[Claims] 1. In a print control system for a tabletop electronic calculator that is equipped with a record display means using a printing device and a non-record display means using a visible display device, a print control input means for controlling the record display means using the print device; A storage means for storing the state of the print control input means, and a means for detecting the states of the print control input means and the storage means and generating a detection signal in case of a predetermined state transition, and the detection signal is generated. A printing control method characterized by executing a predetermined record display.