JPS6017143B2 - Electronic desk calculator with program - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to an electronic desktop calculator with a program (hereinafter referred to as a "calculator with a program"), and in particular, a program that executes based on the same coded signal stored in a program storage means. The purpose of the present invention is to provide a programmable calculator in which the calculation processing performed can be switched and controlled by operating an externally operable switching means.

<Prior Art> In conventional programmable calculators, the arithmetic processing executed in accordance with the instructions (coded signals) stored in the program storage means is set in one-to-one correspondence with the instructions. It was something that existed.

In other words, there is a one-to-one correspondence between the instructions (coded signals) stored in the program storage means and the arithmetic processing executed in response to the instructions, and a specific instruction is derived from the program storage means. Sometimes, specific arithmetic processing was executed in one-to-one correspondence with the instruction. Therefore, when it is desired to change the arithmetic processing executed based on the program stored in the program storage means, there is a drawback that the program must be rewritten each time in accordance with the change. For example, one of the instructions used in a programmable calculator is a pause instruction. A pause command is a command based on a program.
This is an instruction to stop arithmetic processing for a predetermined period of time, and when the suspension instruction is read from the program storage means, the arithmetic processing based on the program is stopped for a predetermined period of time, and after the predetermined period of time has elapsed, execution of the next step of the program is started. Proceed. This pause command is generally used to display the progress of a program during execution, but there may be cases where it is desired to print the progress of the program instead of displaying it.

In such cases, conventionally the program had to be rewritten. <Object of the Invention> The present invention has been made in an attempt to solve the problems of such conventional programmable calculators.

<Summary of the invention> The basic technical idea is as follows.

That is, an externally operable switching means is provided, and a circuit is further provided to switch and control the processing executed based on the command (coded signal) read from the program storage means in response to the switching operation of the switching means. In response to the operation of the switching means, processing to be executed based on instructions read from the program storage means can be switched and controlled. More specifically, the programmable calculator of the present invention is provided with an externally operable switching means, and the externally operable switching means performs a process originally executed in response to a pause command read from the program storage means. The present invention is characterized in that switching control can be performed between pause processing and printing processing.

With such a configuration, it is possible to select whether the pause instruction incorporated in the program acts as the original pause instruction or as a print instruction by simply switching the switching means, which eliminates the problem of the prior art described above. This can solve the problems mentioned in the explanation section.

<Example> Hereinafter, the present invention will be explained in detail based on Examples.

FIG. 1 is a block diagram showing a schematic configuration of an internal circuit in the first embodiment.

In the figure, KB is a keyboard that includes keys such as numeric keys and function keys, EC is an encoder circuit that outputs a coded signal corresponding to the operation key when a key on the keyboard KB is operated, and PRM is the encoder described above. A program memory in which circuit output signals are sequentially stored, WC is a write control circuit for the program memory PRM, and AC is a PRM
address register, ADC is address decoder, AD
11, CLC is the program clear key PC
A circuit that sets the contents of AC to the initial state (content specified in the first step of PRM) based on the operation of L, G is a gate circuit that is turned on by the program progress signal NE, and when the gate circuit G is turned on, The contents of address register AC are counted up by "1" by adder AD.

That is, execution of the program advances to the next step. OD is a program code decoder, CU is a central control circuit, and DL is a delay circuit, which outputs an output signal after a predetermined period of time when an input signal is supplied. The DK is a key switch for selecting whether the pause command stored in the program memory PRM acts as a main button pause command or as a print command.

It is assumed that a desired program is stored in the program memory PRM.

In other words, general control command (for example, operation command) OPS, pause command PAUSE, print command PRINT, and end command END.
etc. are included.

Before checking, debugging, or automatically running a program, first press the program clear key PCL.
The contents of the address register AC are set to the first step specification contents, and the program instruction is output as RO.

Then, this is decoded by the program code decoder OD, and if it is a general control command OPS, the central control circuit is made to execute a predetermined control at U, and at the end, a program progress signal N is sent.
Generate E. When NE occurs, gate circuit G is turned on and the output of adder AD is fed back to address register AC. At this time, the two inputs of AD are the contents of AC and “1”.
is given, so AC+1→AC, that is, AC is
1” count up. Since the second step of the program memory is thereby selected, the contents of the second step are input to the program code decoder OD, and a predetermined control signal is output from the OD and executed by the central control circuit CU. In the process of program processing, when the pause command is decoded by the program code decoder PD, if the key switch DK is on, the AND gate G,
is turned on, an input signal is given to the delay circuit DL, and the output of DL is output after the pause time has elapsed.

The above-mentioned gate circuit G is turned on by the output signal of this DL, and the program proceeds. That is, the original operation of the pause command is executed. If key switch DK is off, AND gate G2 is turned on, and the output of OR gate G3 is output at the same time as the print command PRmT is decoded, thereby executing the predetermined printing operation. Ru.

As mentioned above, by switching the key switch DK,
The process executed based on the pause command PAUSE can be controlled to be switched between the original pause process and printing process.

In a configuration in which all pause commands become equivalent to print commands by switching the switch DK, as in the first embodiment, there is a risk that the original function of the pause command will be lost.

Therefore, as a means to solve this problem, two types of pause commands are provided, the PAUSEI command and the PAUSED command.
It is conceivable that the AUSEI command is an original pause command, and the PAUSEI command is a command that can be switched between a pause command and a print command by switching a switch. A second embodiment configured in this manner will be described next.

FIG. 2 is a block diagram showing the configuration of the second embodiment.

Portions corresponding to the configuration of the first embodiment are denoted by the same reference numerals, and a description thereof will be omitted. When the print command PRINT is decoded by the program code decoder OD, a signal is applied to the OR gate G3, and a predetermined print process is executed based on the output signal of the OR gate G3.

Also, when the pause command PAUSEI is decoded, an input signal is given to the delay circuit DL via the OR gate G4, and after a predetermined time, an output signal from DL is output, and this signal turns on the gate circuit G, so that the pause process is executed. be done. Next, a description will be given of when the pause command PAUSE is decoded.

At this time, if the switch DK is on, the AND gate G is on, and the output signal of the AND gate G is applied to the delay circuit DL via the OR gate G4, so that the pause process is executed. On the other hand, if switch DK is off, AND gate G2 is on, and AND gate G
2 outputs an output signal, and this signal is applied to OR gate G3, so that printing processing is executed. <Effects> As described in detail above, the programmable calculator of the present invention includes an externally operable switching means and an execution function based on a pause command read from the program storage means in response to the operation of the switching means. Since the present invention is characterized in that it is provided with a means for controlling switching of the processing to be performed between the pause processing and the print processing, it is possible to display the intermediate progress and to print it by simply switching the processing by the switching means. This makes it possible to obtain an extremely useful calculator with a program, which eliminates the need to rewrite programs as in the past.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the structure of a first embodiment of the invention, and FIG. 2 is a block diagram showing the structure of a second embodiment of the invention. Code, KB: Keyboard, EC: Encoder circuit, PR
M: Program memory, WC: Program memory PRM
Write control circuit, AC: address register, AD: adder, ADC: address decoder, G: gate circuit, O
D: Huh. . Gram code decoder, CU: central control circuit, DK: key switch, ○,, G2: AND gate, G3, G4:
OR gate, DL: delay circuit, NE: program progress signal. Figure 1 Figure 2

Claims (1)

[Claims] 1. In a programmed electronic desktop calculator having a pause command input key, an externally operable switching means;
An electronic device with a program, characterized in that it is provided with means for controlling the switching of the processing to be executed based on the suspension command read from the program storage means to suspension processing and printing processing based on the operation of the switching means. Formula desktop calculator.