JPS6015988B2 - Electronic desk calculator with program - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic desktop calculator with a program (hereinafter referred to as a "calculator with a program"), and particularly relates to arithmetic processing executed based on the same coded signal stored in a program storage means. The present invention provides a calculator with a program that can be switched and controlled by operating an externally operable switching means.

In conventional programmable calculators, the arithmetic processing executed based on the instructions (coded signals) stored in the program storage means is set in one-to-one correspondence with the instructions. .

That is, there is a one-to-one correspondence between the instructions (coded signals) stored in the program storage means and the arithmetic processing executed based on the instructions, and it is possible that a particular 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 to stop arithmetic processing for a predetermined period of time based on a program, and when the suspension command is read out from the program storage means, a suspension command is an instruction to stop arithmetic processing for a predetermined period of time based on a program. After the elapsed time, P. Proceed to execute the next step of the program. This pause instruction is generally used to display the progress of a program during execution, but is also useful when debugging a program written in a program storage means.

In other words, conventional program debugging involves
The program was executed step by step to check whether the program was installed correctly, but the above-mentioned pause instruction was used to incorporate this pause instruction into several places in the program. If a program can be debugged by looking only at the arithmetic processing results at a predetermined step without checking the arithmetic processing results at all steps, the program can also be debugged using this method. According to this method, the program can be executed for a long time until the pause instruction is read, so that debugging time can be shortened. but,
The pause instruction used for the purpose of shortening debugging time becomes unnecessary once the program is completed, and conversely causes a prolongation of program execution time.

In conventional programmable calculators, in such cases,
It was necessary to accept the fact that the program execution time would be long, or else it was necessary to perform the extremely troublesome operation of deleting the above-mentioned pause commands one by one (that is, restarting the program). The present invention has been made in an attempt to solve these problems in conventional programmable calculators, and its basic technical idea is as follows.

That is, the programmable calculator of the present invention includes an externally operable switching means and an arithmetic processing executed based on instructions (encoded signals) read from the program storage means in response to a switching operation of the switching means. The present invention is characterized in that it is provided with a circuit for switching control, and is configured to switch and control arithmetic processing executed based on instructions read from the program storage means in accordance with the operation of the switching means.

More specifically, the programmable calculator of the present invention, which has a pause command input key, includes a first pause command input key, a second pause command input key, externally operable switching means, and a program storage. means for always executing a suspension process based on the first suspension instruction read from the means; and arithmetic processing executed based on the first suspension instruction read from the program storage means based on the operation of the switching means. The present invention is characterized in that it includes means for controlling switching between the pause processing and the skip processing.

The present invention will be explained in detail below based on Examples.
Before that, the configuration of a programmable calculator, which is the basis of the present invention, will be explained.

The programmable calculator is equipped with an externally operable switch, so that the arithmetic processing executed based on the pause command read from the program storage means can be controlled to be switched between the original pause processing and skip processing. is on standby.

Here, the skip process refers to a process in which execution of the program immediately proceeds to the next step without executing any arithmetic processing. With this configuration, by changing the switch, the pause command incorporated in the program can be executed.
It can be used as a pause instruction during debugging and as a skip instruction during automatic program execution.
It can be seen that the problems mentioned in the description of the prior art can be solved.

FIG. 1 is a block diagram showing a schematic configuration of an internal circuit in the programmable calculator. In the figure, KB is a keyboard that includes keys such as numeric keys and function keys, and E
C is an encoder circuit that outputs a coded signal corresponding to the operation key when the key of the electronic desk calculator Hiro B is operated;
PRM is a program memory in which the output signals of the encoder circuit are sequentially stored, WC is a write control circuit for the program memory PRM, AC is an address register for the PRM,
ADC is an address decoder, AD is a
C is set to A based on the operation of the program clear key PCL.
Initialize the contents of C (contents specified in the first step of PRM)
In the circuit set to , ■ is a gate circuit that is turned on by the program progress signal NE. When the gate circuit ◎ is turned on, the contents of the address register AC are counted up by "1" by the 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. It is assumed that a desired program is stored in the program memory PRM.

In other words, general control commands (e.g. calculation commands) OPS, pause commands PAUSE, skip commands SKIP, and termination commands END.
etc. are included.

Before checking, debugging, or autorunning a program, first run it.

Set the contents of the address register AC to the contents specified for the first step using the program clear key PCL, and set the program command to R.
Output as O. This is then decoded by a program code decoder OD, and if the general control command is found to be 0, the central control circuit CU executes a predetermined control, and upon completion of the control, a program progress signal NE is generated. When NE occurs, gate circuit (2) turns on and feeds back the output of adder AD to address register AC. At this time, the two inputs of AD are
Since the contents of AC and “1” are given, AC11→
AC, that is, AC is counted up by "1". The second step of the program memory is thereby selected, so that the contents of the second step are stored in the program code decoder OD.
A predetermined control signal is output from OD and executed by the central control circuit CU. In the process of program processing, when a pause instruction is decoded by the program code decoder PD, if the debug key switch OK is turned on, the AND gate G is turned on and the delay circuit D is decoded.
An input signal can be applied to L, and an output of DL will be output after the pause time has elapsed. The above-mentioned gate circuit ◎ is turned on by the output signal of this DL, and the program proceeds. That is, the operation of the pause command main button is executed. If debug key switch DK is off, AND gate G2 is turned on, and the output of AND gate G3 is immediately output, just like when the general skip command SKIP is decoded. Turn on the gate circuit ◎ and proceed to the next step of the program. As described above, by switching the debug key switch DK, the arithmetic processing that is executed when the pause command PAUSE is blocked can be switched to the original pause processing and skip processing, so when debugging, the debug key switch DK is turned on. This allows program debugging using the pause instruction, and when the program is automatically executed, by turning off the DK, even if the pause instruction is read, only a skip operation is performed, so the program execution time is reduced. It won't be long.

However, in a configuration such as this programmable calculator in which all pause commands are equivalent to skip commands by switching the switch DK, there is a risk that the main function of the pause command may be impaired.

The programmable calculator of the present invention further solves this problem. That is, as a means to solve the above problem, the PAUSEI command and the PAUS command are used as pause commands.
Two types of ED commands are provided, the PAUSEI command is a main button suspension command, and the PAUSEO command is a command that can be switched between a pause command and a jump command by switching a switch.

Examples of the present invention will be described below. FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention.

Components corresponding to the configuration in FIG. 1 are designated by the same reference numerals, and their explanation will be omitted.

When the program code decoder OD decodes the skip command SKm, a signal is given to the OR gate Q, and the output signal of the OR gate G3 turns on the gate circuit ◎, so that the skip process is executed.

Also, when the pause command PAUSE1 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 ◎, so that the pause process is executed. be done. Next, a description will be given of when the pause command PAUSED 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 turned on, AND gate G2 outputs an output signal, and this signal is given to OR gate G3, so that skip processing is executed. A pause instruction PAUSEO may be inserted into a step that requires a pause only when debugging a program, and a pause instruction PAUSEI may be inserted into a step where a pause is required even during automatic program execution. As described above in detail, the programmable calculator of the present invention includes a pause command input key, a first pause command input key, a second pause command input key, and externally operable switching means. means for always executing the suspension process based on the first suspension instruction read from the program storage means; and based on the operation of the switching means;
The present invention is characterized in that it is provided with means for controlling switching of arithmetic processing executed based on the second pause instruction read from the program storage means into the pause processing and the skip processing. According to the above, it is possible to obtain an extremely useful programmable calculator that can shorten debugging time without impairing the original function of the pause command at all.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a programmable calculator that is the basis of the present invention, and FIG. 2 is a block diagram showing an embodiment of the present 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, ◎Gate circuit, O
C: Program code decoder, CU: Central control circuit, D
K: debug key switch, G,, G2: AND gate, G3, G4: OR gate, DL: delay circuit, NE: program progress signal. ke/dental ke 2 field

Claims (1)

[Claims] 1. In a programmed electronic desk calculator having a pause instruction input key, a first pause instruction input key, a second pause instruction input key, externally operable switching means,
means for constantly executing a suspension process based on the first suspension instruction read from the program storage means; 1. An electronic desk calculator with a program, characterized in that the electronic desk calculator with a program is provided with a means for controlling the switching of the arithmetic processing to the pause processing and the skip processing.