JPS6217782B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a program writing control system for a small electronic computer equipped with a program function based on a learn program system.

A small electronic calculator equipped with a program function has a learn program method in which key operation commands are sequentially written into a program memory while executing operations through key operations. In this learn program method, after specifying the write mode, by performing a key operation on a calculation formula in which a certain numerical value is substituted as a variable in the formula to be programmed, the calculation result can be determined and the program can be written.
A feature is that calculation results can be obtained even in write mode. However, since the key operations after specifying the write mode are written as a program,
For example, when writing only a certain part of a calculation formula as a program, or when performing simple calculations before writing the program, in other words, when performing normal calculations (manual calculations) and writing the program in parallel, It is necessary to switch between the normal calculation mode and the write mode each time, which makes the operation complicated.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a program writing control method for a small electronic calculator in which a portion to be written as a program can be specified in a learn program method.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In Fig. 1, 1 is a key input section, including a mode switch 2 for specifying the program writing mode "LRN" and the normal calculation and program execution mode "RUN", and a _P1 key 3 for specifying the program name.
In addition to the a and _P2 keys 3b, the computer is equipped with various keys required for programs and normal calculations, such as a numeric keypad and function keys. The key input section 1 creates a key code corresponding to the operated key and outputs it to the control section 4 and the storage section 5, respectively. The storage unit 5 is composed of a plurality of registers such as an input register, a calculation register, a display register, etc., and stores calculation data to the calculation unit 6.
Furthermore, display data is output to the display section 7, respectively. The calculation unit 6 performs a predetermined calculation on the input data, outputs the calculation result data to the storage unit 5, outputs the program data to the program memory 8, and outputs the judgment result when performing the judgment process to the control unit 4. Output to.

The control section 4 controls each section based on the key code and judgment results, etc., and sends control signals to the storage section 5 instructing address designation of each register, reading and reading of data, etc. For program counter 9, press the P ₁ key 3a.
In response to the operation of the _P2 key 3b, an initial value setting signal is sent out. This program counter 9 specifies the write and read addresses of the program memory 8, and is incremented by a signal a given from the control section 4 to sequentially specify the addresses of the program memory 8. Further, the control section 4 outputs the signal b while the mode switch 2 is designated to the mode "LRN", and outputs the signal c while the mode is designated to the mode "RUN". These signals b and c are applied to the first input terminals of AND gates 10 and 11, respectively. Furthermore, the control section 4 outputs signals d and e, respectively, when the P ₁ key 3a and P ₂ key 3b are operated in the key input section 1, and outputs the signal f when the mode switch 2 is switched. The signals d and e are applied as set signals to the set side input terminal S of the flip-flop 13 via the OR gate 12.
The signal f is applied to the reset side input terminal R of the flip-flop 13 as a reset signal. The output of the set side output terminal Q of the flip-flop 13 is applied to the second input terminals of the AND gates 10 and 11. Thus, while the flip-flop 13 is set when the signal b is output, the signal g output from the AND gate 10 is given as a write command to the program memory 8, and the flip-flop 13 is set when the signal c is output. The signal h output from the AND gate 11 is given to the program memory 8 as a read command.

The program memory 8 sequentially stores the program data sent from the arithmetic unit 6 at the address designated by the program counter 9 while the signal g is applied, and while the signal h is applied sends program data at addresses sequentially designated by the program counter 9 to the storage unit 5, allowing the program to be executed.

Next, the operation of this embodiment having the above configuration will be explained. The small electronic calculator of this embodiment can write two programs using the learn program method. When writing a program, set mode switch 2 to mode "LRN" in key input section 1.
Specify. The key input unit 1 outputs a key code corresponding to this operation, and the control unit 4 outputs a signal b to the AND gate 10. Next, the program name is designated by operating either the _P1 key 3a or the _P2 key 3b for designating the program name. At this time, the control unit 4 sends the start address of the area of the designated program name in the program memory 8 to the program counter 9 as an initial value setting signal. At the same time, mode switch 2 is set to mode "LRN"
The flip _- flop 13, which is reset by the signal f output from the control _unit 4 when is set. Therefore, the output of the set side output terminal Q of the flip-flop 13 is "1" at the binary logic level.
Then, the AND gate 10 is opened and the signal g is applied to the program memory 8 as a write command, so that the program can be written from now on. Therefore, subsequent key operations are sequentially stored in the program memory 8, and the calculation results are displayed on the display section 7. In addition, when executing the program written in the program memory 8, the mode switch 2 is set to the mode "RUN" in the key input section 1.
, and specify the program name using the P ₁ key 3a or P ₂ key 3b. At this time, the control section 4 outputs a signal c to the AND gate 11, and further sends the start address of the area of the designated program name in the program memory 8 to the program counter 9 as an initial value setting signal. At the same time, the flip-flop 13, which is reset by the signal f output from the control unit 4 when the mode switch 2 is set to the mode "RUN", is activated by the _P1 key 3a and the _P2 key 3b.
Signal d output when either is operated
Alternatively, it is set by signal e. Therefore, the output of the set side output terminal Q of the flip-flop 13 becomes "1" at the binary logic level, and the AND gate 11 is opened, and the signal h is sent to the program memory 8.
is given as a read command, and the program can then be executed. Therefore, by operating a program execution key (not shown) after inputting a predetermined numerical value for the written program variable in the key input section 1, the program data in the program memory 8 is sequentially read out and the program is executed based on this data. The calculation is performed and the calculation result is displayed on the display section 7.

In this way, if the _P1 key 3a and _P2 key 3b for specifying the program name are operated in the "LRN" and "RUN" modes, it is possible to write or execute a program, but the _P1 key 3a, Normal calculations can be performed until the _P2 key 3b is operated. That is,
By specifying the "LRN" and "RUN" modes, the control unit 4 outputs either signal b or c to the AND gates 10 and 11. However, P ₁ key 3a,
Until the _P2 key 3b is operated, the flip-flop 13 is reset by the signal f, and the output from the set side output terminal Q remains at "0". Therefore, AND gates 10 and 11 are both closed, and signal g, which is a write command, or signal h, which is a read command, is not sent to program memory 8. For this, for example mode "LRN"
Even if it is specified, the key operations on the key input section 1 are not written into the program memory 8, but are displayed on the display section 7 after calculations corresponding to the key operations for manual calculation are performed.

In order to understand the above operation, we will explain it using Figure 2 which shows the outline of this operation as a flowchart.When a key operation is performed, the P ₁ key 3
Until the a and _P2 keys 3b are operated, calculations corresponding to the above key operations are performed and displayed (steps S ₁ →S ₄ →S ₅ in FIG. 2). In addition, key operations after either the P ₁ key 3a or the P ₂ key 3b are operated are written as a program, calculated and displayed if the mode is "LRN" (steps in Figure 2).
(S ₁ → S ₂ → S ₃ → S ₄ → S ₅ ), and if the mode is "RUN", the program is executed and the calculation result is displayed (Steps S ₁ → S ₂ → S ₆ → in Figure 2). _S5 ).

In the above embodiment, two programs can be written, but the number of programs is not limited.

Further, in the above embodiment, the program is enabled to be written when the keys 3a and 3b for specifying the program name are operated after the mode is set to "LRN". That is, the keys 3a and 3b for specifying program names are functionally also used as keys for instructing program writing, but a key for instructing program writing is provided separately from such keys for specifying program names.
The same effect can be obtained by setting the flip-flop 13 to output a write command when this key is operated, for example, as explained in the above embodiment.

As detailed above, the present invention provides a small electronic calculator equipped with a program function based on the learn program method, in which the program is not written until a key instructing program writing is operated even when the program is set to write mode. This allows normal manual calculations to be performed without any errors occurring, and allows the program to be written after a key operation instructing to write the program. Therefore, even when programming only a certain part of a calculation formula, or when performing simple calculations before writing a program, there is no need to switch modes each time, and operability can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a small electronic calculator which is an embodiment of the present invention, and FIG. 2 is a flowchart for explaining the operation of FIG. 1...Key input section, 2...Mode switch, 3
a, 3b...Program name designation key, 4...Control unit, 8...Program memory, 10, 11...And gate, 13...Flip-flop.

Claims (1)

[Claims] 1. In a small electronic calculator equipped with a program function using a learn program method that executes operations instructed by key operations and writes key operation commands to a program memory, an addressing means for specifying an address of the program memory; , a calculation means for reading out the stored contents of the program memory specified by the addressing means and performing program calculations and normal manual calculations, and a mode selection means for selectively specifying a program writing and execution mode; A write instruction means for instructing writing of a program, and after a write mode is designated by the mode selection means, the write command is not output to the program memory until the writing of the program is instructed by the write instruction means, and the above operation is performed. A program for a small electronic calculator, characterized in that the computer is configured to perform manual arithmetic operations by the means, and further comprises control means for outputting a write command to the program memory when writing of a program is instructed by the write instruction means. Write control method.