JPS5931745B2 - Unused program number display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a system for displaying unused program numbers in a small electronic calculator with a program.

A small electronic calculator with a program can store multiple programs in its memory, but a program number (or program bell) is added to the beginning of each program to distinguish the storage area of each program. There is. When writing a program manually,
Which program number to use is generally left to the operator's own control. Therefore, if the operator does not remember the program number used when writing a program, it is necessary to display the previously programmed contents one by one and check the program number used.
The operation was extremely troublesome. Furthermore, if a new program is programmed into a program number that has already been programmed before without performing this check, there is a risk that the previous program number will be cleared and malfunction will occur. The present invention has been made in view of the above points, and provides an unused program number display method that clearly indicates unused program numbers when switching to write mode and allows easy checking of the usage status of the program numbers. The purpose is to provide. An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 10 is a key input section, ticky 11,
Together with the function key 12, the WRITE key 13 specifies the write mode and the RU commands the start of the program.
It is equipped with an N key 14. Key input data from the key input unit 10 is sent to the address unit 21 in the CPU (central processing unit) 20, and the address unit 21 sends the key input data to the control unit 2.
2 addressing is performed. In addition to the signals input from the key input section 10, the address section 21 includes a carry signal of a program counter 23, which will be described later, and a calculation/judge section 2.
The judgment output of No. 4 is given as address data. The control section 22 is configured using, for example, a ROM (read only memory), stores various microprograms, and has an output line a1 for specifying a row address of a RAM (random access memory) 25, and a code signal output line B. ．． It is provided with an output line c for specifying a column address of the RAM 25 and an instruction output line d, and is used to perform various control operations. The row address output from the output line a of the ROM 22 is sent directly to the RAM 25, and the row address is output from the output line e of the ROM 22.
The column address output from the address counter 26 is set in the address counter 26, and the count contents are sent to the RAM 25.
After the first column address data is set, the address counter 26 can sequentially count up in accordance with a timing signal to advance the column address of the RAM 25 to a designated digit. The RAM 25 is composed of various operation registers such as an X register and a Y register, and a register is designated by a row address, and a digit of the designated register is designated by a column address. The data read from the RAM 25 is input to the calculation/judge section 24. In addition, this calculation/judge section 24J
A code signal output from the output line b of the control section 22 is given to the control section 22. The calculation/setting unit 24 performs calculations on the input data and also checks the calculation results for the presence or absence of numerical values and the presence or absence of a carry signal.The calculation results are sent to the RAM 25, and the judgment results are as described above. It is sent to the address section 21. Instructions output from the output line d of the control section 22 are decoded by the instruction decoder 27, and are sent as control commands to each section, such as a calculation command to the calculation/judge section 24, and a read/write command to the RAM 25. Write commands etc. are sent. Further, the instruction decoder 27 sends a +1 signal to the program counter 23 and also sends a set signal. This program counter 23 is
External RAM 3 for program storage provided outside of O
This is a counter that specifies the address of l. External RAM3
Data read out from the RAM 25 within the CPU 2O is input to the input terminal 1. Further, the external RAM 3l receives a read/write command R given from the instruction decoder 17.
The read or write mode is specified by /W, and the output data is stored in the RAM 25 in the CPU 2O.
sent to. Further, an external ROM 32 for storing constants is provided outside the CPU 2O. This external ROM
32 is constant data such as "π" and predetermined data such as program number data "9, 8, 7, 6, 5, 4, 3,
2, 1, 0, P", and the address is designated by the code signal output from the output line b of the control section 22. The constant read from this ROM32 is CP
It is sent to RAM25 in U2O. The X register in this RAM 25 serves as both an arithmetic register and a display register, and its stored contents are outputted to an external display drive circuit 33 via an arithmetic/judge section 24.
3, the display section 34 is driven. Figure 2 shows RAM2
5 shows details of the X register and Y register in 5. The X register and the Y register have a 14-digit configuration, with the 0th digit being a flag digit and the 1st to 13th lines being data storage digits. Therefore, when displaying an unused program number, the program number read from the external ROM 32 is written in the 1st to 13th digits of the X register. In other words, the second digit of the X register is "P", which indicates a program, and 4.
Program numbers [0 to 9] are written in the 13th to 13th digits. In addition, the Y register has a mode flag indicating the write mode in the O digit, and an external RAM 3 which is addressed by the program counter 23 in the 10th and 11th digits.
The memory contents of l are written. FIG. 3 shows the state of program storage in the external RAM 3l, in which a program number is written at the beginning of each program.

For example, the external RAM 3l has a 2-digit configuration with ``000'' to ``12''.
7], and can store 10 programs from PO to P9. In this case, the program numbers "0" to "9" are used, 1-0" are written in the upper digits, and the program number is displayed according to the contents of the lower digits. Therefore, if data other than "0" is written in the upper digit, or even if the upper digit is "0" but data other than "0" to "9" is written in the lower digit, it indicates the content of the program. ing. Next, the operation of the present invention configured as described above will be explained.

When writing a program, first, key input section 1
Operate the WRITE key 13 of 0 to switch to the write mode. When the WRITE key 13 is operated, the operation signal is sent to the address section 21 in the CPU 2O, and the address section 21 specifies the address of the control section 22, and the unused program number display process shown in FIG. will be held. First, from the output line b of the control section 22 to the external ROM
A code signal specifying address 32 is output, and all program numbers "9, 8, 7, 6, 5" are output from external ROM 32.
, 4, 3, 2, 1, 0, BL, P, BL are read out and written into the 1st to 13th digits of the X register as shown in step S of FIG. 4 and FIG. 5. Note that "BL" in the above program number is a blanking code. Also,
By entering the write mode as described above, "1" indicating the write mode is written in the flag digit of the Y register as shown in FIG. 5. Next, the process advances to step S2 in FIG.
A set signal is sent to the program counter 23 via the program counter 23, and the program counter 23 is reset. Next, as shown in step S3, the address of the external RAM 3l is designated by the contents of the program counter 23, and the stored contents are read out to the 10th and 11th digits of the Y register.
For example, if the program shown in FIG. 3 is stored in the external RAM 3l, the program counter 23 initially specifies the address "000", so the external RAM 3l stores the program shown in FIG.
Memory content “00” from AM3l to the specified address (
PO) is read out to the 10th and 11th digits of the Y register. Thereafter, in steps S4 and S5, it is determined whether the data is a program number. That is, first, in step S4, it is determined whether the content of the 11th digit of the Y register is "old" or not. If it is "O", the process proceeds to step S5 and it is determined whether the content of the 10th digit of the Y register is greater than "9". If the content of the 10th digit of the Y register is "9" or less, the process advances to step S6, where "4" is added to YlO to the content of the 10th digit of the Y register, and the addition result is calculated/
The data is transferred from the azimuth section 24 to the address counter 26, and a BL (blanking) code is input into the corresponding digit of the X register. Since the program number is written in the fourth digit or higher of the X register, the above value "4" is used to correct that digit. Therefore, in the above case, since the contents of the 10th digit Y and O of the Y register are "O", the result of +4 is [4], and therefore "4" is set in the address counter 26. As shown in FIG. 5, the BL code is written in the fourth digit of the X register. Step S6 above
If the process has been completed, or if the determination result in step S4 is NO, or if the content of the YlO digit is greater than "9" in step S5, the process advances to step S7, and the instruction recorder 27 is stored in the program counter 23.
A +1 signal is applied to the counter to increment the count by 1, and as a result it is determined whether or not a carry signal has been generated. That is,
It is determined whether all reading from the external RAM 3l has been completed. At this step S7, there is no carry signal and the external R
If all reading from AM3l has not been completed, the process returns to step S3, and the stored contents for the next address of external RAM 3l specified by the program counter 23 are stored in the 10th and 11th digits of the Y register as shown in FIG. Read it to the eye. At this time, the contents read from the external RAM 3l to the Y register indicate the contents of the program P at 611, so the program jumps up from step S4 to step S7, increments the program counter 23 by 1, and returns to step S3 again. The same process is repeated and as shown in FIG. Then, add "4" to the content "7" of the YlO digit to make "11", set this addition result in the address counter 26, and set it to 1 of the X register.
Write the BL code in the first digit and blank the program number "7". Similarly, the next program number "04" (P4) stored in the external RAM 3l
Also, blanking processing is performed as shown in FIG. 5 and FIG. In this way, the stored contents of the external RAM 3l are checked, and when the process reaches the final address "127", a carry occurs in step S7, and the process proceeds to step S8.

In this step S8, the contents of the X register are sent to the display drive circuit 33 via the arithmetic/judge section 24 and displayed on the display section 34 as shown in FIG. That is, X
Among all the program numbers initially set in the register, the program numbers already written in the external RAM 3l,
For example, in the above embodiment, "7", "4", and "0" are blanked, so unused program numbers "9,"
8, 6, 5, 3, 2, 1] is displayed on the display unit 34. Note that in the above embodiment, program numbers that have already been used are blanked out, but conversely, unused program numbers may be blanked out and only the program numbers that are being used are displayed.

In addition, for example, all program numbers may be displayed, and a decimal point may be used to indicate a program number in use or an unused one, and various other modifications may be made without departing from the gist of the present application. As described above, according to the present invention, it is possible to clearly indicate the program numbers currently in use and unused program numbers when writing a program, so there is no need to check the program numbers currently in use during programming. , very efficient.

Furthermore, the same program number will not be used by mistake, and programming errors can be prevented.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a circuit configuration diagram, FIG. 2 is a diagram showing the configuration of the RAM in the CPU in FIG. 1, and FIG. 3 is a program storage state of the external RAM. Figure 4 is a flowchart showing the operation details.
FIGS. 1 to 7 are diagrams showing the contents and display states of each register, program counter, and external RAM at each processing step. 10...Key input section, 13...WRI
TE key 20... CPU, 22... Control unit, 23... Program counter, 24...
......Calculation/Judge section, 25...RAM,
31...External RAM, 32...External R
OM, 34...Display section.

Claims (1)

[Claims] 1. In a small electronic computer with a program, a program storage device that sequentially stores input program information, and a program that has already been written by sequentially reading out the storage contents stored in this storage device. The present invention is characterized by comprising a detection means for detecting the number, and a control means for referring to the used program number detected by the detection means and displaying the used program number or the unused program number in a predetermined format. Unused program number display method. 2. The unused program according to claim 1, wherein the control means controls so that only the used program number detected by the detection means is displayed in a predetermined format, and as a result, the unused program number is made known. Number display method. 3. The control means controls to display only the unused program number obtained by referring to the used program number detected by the detection means in a predetermined format, and directly informs the unused program number. Unused program number display method described in Range 1. 4. The control means displays all of the program numbers and adds a predetermined code to either the used program number or the unused program number obtained by referring to the used program number detected by the detection means. An unused program number display method according to claim 1, wherein the unused program number is controlled to be displayed and the unused program number is notified directly or indirectly.