JPS6038741B2 - Program and data recording/playback method - Google Patents

Description

[Detailed description of the invention] This invention is F.

[]Relates to a method for writing programs and data with file names attached to external storage devices (tape recorders, etc.) in electronic calculators, personal computers, etc., and calling up these contents by specifying the file name as necessary. Conventionally, there has been a method to call and use programs and data written in an external storage device as appropriate on a programmable electronic desktop calculator, personal computer, etc. by specifying the file name given at the time of writing. If the operator does not know exactly what is being specified, he or she may make a mistake as to whether it is a program or data. There was a risk that an extremely inconvenient situation would occur in which data with the above file name would be included in the program area of the computer.

The present invention solves the above-mentioned conventional drawbacks by providing a means for writing information for distinguishing programs and data along with file names when writing information to an external storage device, thereby making it possible to distinguish between programs and data. The purpose is to do something.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

FIG. 1 shows a block diagram of one embodiment of the present invention.

In the figure, reference numeral 1 denotes a programmable electronic desktop calculator (hereinafter referred to as a calculator), which can store programs and data in RAM, and transfers the contents via an interface 3 to a tape recorder 2 (external storage device) for recording. Or, conversely, the content recorded on the tape recorder 2 can be introduced through the above-mentioned /recording interface 3, and calculation operations can be performed using the reproduced signal. FIG. 2 is a block diagram showing the configuration of the computer 1. As shown in FIG. In the figure, 4 is a CPU (central processing unit), 5 is a ROM (read-only memory), 6 is a RAM (read/write memory), 7 is a display memory and buffer, 8 is a display, and 9 is a key input device. . Here, the CPU 4 performs processing such as reading key signals, writing display data to the display memory and buffer 7, and executing calculations according to the procedure written in advance in the ROM 5, and also reads the RA of key input contents.
Writing to M6, writing to display memory and buffer 7 to display data such as the written contents of RNM6 or calculation results on display 8, processing to perform calculation operations according to the program written to RAM 6, etc. Do the following. Furthermore, it performs processing such as transferring programs or data stored in the RAM 6 to the external storage device 2, or conversely transferring the contents of the external storage device 2 to the RAM 6. Here, programs and data or key input contents are stored in the RAM 6. The key input device 9 receives a strobe signal S and a key signal K from the CPU 4.
are introduced, matrixed, and combined, and the types of keys include numeric keys, symbol keys, alphabet keys, etc. In the figure, A is an address bus, D is a data bus R/W is a read/write signal, CUT is a recording signal to the tape recorder 2, and state is a reproduction signal from the tape recorder 2. FIG. 3 shows a partial block diagram of the CPU.

In the figure, 10 is a data buffer that receives information from data bus D, 11 is an instruction register, 12 is an instruction decoder, 13 is a register and a flag, and 14 is an address buffer that is connected to the address bus. 15 is an OUT buffer for temporarily storing a recording signal to the tape recorder 2.

16 is an IN buffer that temporarily stores the playback signal from the tape recorder 2.

17 is a temporary register, 18 is an accumulator, 1
9 indicates an ALU (arithmetic circuit), and 20 indicates a carry.

21 is a buffer for the strobe signal S, and 22 is a buffer for the key signal K.

In the figure, PA is a register that specifies the address where the program is to be input, PB is the final address of the program, and DA is a register that specifies the address where the data is to be input. F'register to record the specified file name,
F' is a register that records the name of the file to be transferred. P is a flag that indicates data in a set state and a program in a reset state. As described above, the present invention writes programs and data to an external storage device, and reads the contents from the external storage device. FIG. 4 shows a recording method on a tape recorder as an external storage device. The arrow in the figure indicates the tape feeding direction. The first 1 byte (8 bits) is the first code 23, which is not used in the computer, making it easy to detect this code during playback. Furthermore, the contents of this leading code 23 are made different between when recording a program and when recording data. After the first code 23, a file name 24 is recorded. Here, the file name is 8 bytes. This file name is arbitrarily determined by the operator for the program and data, and when recalling what has been recorded on tape, the cheap file name can be searched by inputting this file name into a computer. The program and data corresponding to the input file name are detected. After this file name, there is a part where a program or data 25 is recorded, and finally a final code 26 is recorded. This final code 26 is different from the code used in a computer, and when this code is detected during tape playback, information retrieval of the tape 2 is terminated. FIG. 5 shows a 1-byte recording method.

In the figure, 28 is a range of 1 byte of information, and between the start bit 29 and the strip bit 30 there are 8 data bits from 0 to 7. Recording is performed on the tape as described above.Next, the method of recording on the tape will be explained with reference to the flowchart of FIG.

In the CPU 4, this routine is called from the ROM when recording a program or data. A flag P in the CPU 4 is set according to the basic command language when recording a program, and is reset when recording data. In step m, it is determined whether the flag P is set or reset. F if flag P is set. Since this indicates that an o-gram is to be recorded, in m2, a code instructing program recording is recorded at the beginning code of the tape. In m3, the 8-byte file name stored in the internal register F' of the CPU 4 is recorded on the tape. After that, record the program on the skin, and record the final chord on m5. If the flag P is set in step m above, a code instructing data recording is recorded in the leading code of the tape. At m7, the 8-byte file name recorded in the internal register F' of the CPU 4 is recorded on the tape. After that, data is recorded at m8, and the final code is recorded at shout. FIG. 7 shows a routine for transferring information from tape 2 to RAM 6 in computer 1.

It is used to determine whether the flag P is set or reset. The state setting of the flag P is set when a program is called and reset when data is called using the basic instruction language, as in the case of recording on a tape. & is executed when the flag P is set (program read), and detects reproduction of the first code instructing the program. n
3, the file name record information is stored in register F in the CPU.
', and a match is detected with the contents of register F in which the file name specified in advance is recorded. In order to transfer the playback content from the tape, memory address PA (
In this case, for the program). In the ratio, it is determined whether the reproduced content is the final code 26 or not. If NO, in n6, the reproduced content is stored in the upper address PA of the memory and the number pair A is incremented to 11 (designates the next address). ,
If the final code is detected at n5, the address PA specified at that time is decremented by 1 and the address is transferred to the register PB at n7. The contents of this register PB indicate the final address of the program. Next, the routine for reproducing the program ends at END. The steps from n9 to n, 4 are related to data reproduction, and are as described above.
It is the same except that n7 is omitted in the procedure of Q. The ratio detects the reproduction of the first code indicating data. n and o transfer the recorded information of the file name to the register F' in the CPU, and detect whether the file name specified in advance matches the contents of the register F in which the file name is recorded. n,
．． sets memory address DA (in this case, for data) in the RAM 6 to transfer the reproduced content from the tape. n
, 2, it is determined whether the reproduced content is the final code 26 or not.
If NO, the playback content is transferred to the above D in the memory at n,3.
It is stored at address A and the address DA is incremented by 11 (designating the next address). If the final code is detected at n,2, it becomes n,48ND, and the data reproduction routine ends. As explained above, according to the present invention, when writing a program and data to an external storage device, by storing a distinction signal to distinguish between the program and data together with the file name, the contents to be stored on tape at the time of retrieval. It is automatically determined whether the program is a program or data, and the contents of the program stored on the tape are sent to the computer's internal data memory.
Conversely, it is possible to prevent the data contents of the tape from being sent to the internal program memory of the computer, and the programs and data stored in the external storage device are identified by the identification code (start code) and file name. Program and data may have the same file name.

Therefore, when naming a file, it is possible to name the file without being too conscious of the difference between the two files, which is an excellent effect.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a device using the file name and data recording/reproducing method according to the present invention, Fig. 2 is a block diagram showing the configuration of a computer, Fig. 3 is a partial block diagram of a CPU, and Fig. 4 is an explanatory diagram showing the recording method on tape, FIG. 5 is a detailed explanatory diagram of FIG. 3 is a flowchart showing a procedure for reproducing information to a computer. In the figure, 1: Computer, 2: Tape recorder, 3: Interface, 4: CPU, 5: R○M, 6: RAM, 7:
Display memory and buffer, 8: Display body, 9: Key input device, 10: Data buffer, 11: Instruction register, 12
: Instruction recorder, 13: Registers and flags, 14: Address buffer, 15: 0UT/data, 16: IN
Buffer, 17: Temporary register, 18: Accumulator, 1 9: ALU, 2 0: Carry, 2 1,
22: Batsuhua. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1 In a recording and reproducing method in which programs and data are stored in an external storage device with a file name assigned, and the desired program or data is called into the computer by specifying the file name, the program is set when recording and reproducing the program. It also has a flag means that is reset when recording and reproducing data, and when recording to an external storage device, when the flag means is set, the program is stored together with an identification code and a file name indicating that the program is a program. When the flag means is reset, the data is recorded along with the identification code and file name indicating that it is data, and when the flag means is set when the recorded information is reproduced from the external storage device, the data is recorded. The program and data are characterized in that the program is read from the program identification code and the file name, and when the flag means is reset, the data is read from the data identification code and the file name. Recording and playback method.