JPS6231381B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for controlling the use of files such as borrow files of online terminals in which data is temporarily stored. Floppy disks are widely used in online financial terminals, and the data entered from the keyboard is written on the floppy disk and then transmitted from the floppy disk to the center.
The data transmitted from the center is once received on a floppy disk, and operations such as reading the disk and printing out the data are performed. In addition to the above two purposes, floppy disks in online financial terminals are used for conversion, that is, for receiving information stored on cassette tapes or paper tapes onto floppy disks, and vice versa; these three main uses are: By the way, in conventional floppy disks, the purpose of use is set for each of the multiple files provided on the disk, and one file corresponds to one purpose of use, so the capacity of each file is small. There is a drawback. FIG. 1 shows one example, where FP is a floppy disk, IT is an index track, P is a program storage area, and _F1 to _F3 are data files. The volume number VOL for distinguishing between floppy disks is written in the track IT poly-label VL, and the file label FL ₁ ~
Intra-disk addresses AB, BC, and CD of files _F1 to _F3 are written in _FL3 , respectively. Although not shown in the figure, other information such as the record length, block length, and address of the last data written in the file are also written to the track IT. When reading or writing a specific file, the file track address corresponding to the target address is found from the start address data of the index track based on the known sequential file access method or partition file access method. Or, in the case of a partition file, find the address of the directory stored at the beginning of the file location from the index track, access the directory part, and find the storage area track address and sector address of the target data from the directory data. After that, access it. The capacity of each of the files _F1 to _F3 is, for example, 100 items, and the entry data _D1 from the keyboard KB is stored in the file _F1 . File _F2 is for received data, and received data _D2 from the center is written therein. Converted data _D3 from tape TP is written to file _F3 . In this way, the files F ₁ to _{F 3} in the floppy disk FP are provided for different purposes, so it is advantageous to be able to store data D ₁ and D ₃ at the same time, but the file capacity is only 1/3 of the disk data area.
(Actually, there are multiple sets of the above three types, so the number decreases further.) Therefore, if the amount of data to be processed increases, the capacity will be insufficient. In this example, entry data D ₁ is a file with more than 100 entries.
F ₁ will not be able to accommodate it. Moreover, at this time, even if file F ₂ is empty, writing data D ₁ to file F ₂ is prohibited, so data D ₁ is eventually written to file F 2.
You must process up to 100 items at one time. This is unavoidable if data D ₁ to _{D 3} are constantly generated and should be stored for a long time, but entry data D ₁ is filtered from the time it is input from the keyboard KB until it is sent to the center.
This kind of data D 1 is only temporarily stored in F ₁ , and there is no problem in erasing the received data D ₂ once it is printed _out . Exclusive use of files in ~D ₃ is uneconomical. This problem can be solved by making the file area variable, but in this case, the operator needs to constantly supervise the memory area. It would be undesirable to have such supervision. Therefore, in the present invention, the area of the file is fixed and the purpose of use is variable. When using the file, the current status of the file is checked, and if it is usable, it is used. That is, the present invention provides a usage control method for a file of an online terminal in which data is temporarily stored, in which a usage mode storage area and a data storage area are provided in the file, and the data storage area is currently used in the usage mode storage area. If there is no such data or the use of the data storage area by the data has ended, an unused code is written in the usage mode storage area, and when writing to or reading from the file, The method is characterized in that the use mode storage area is checked, and the use of the file is permitted only when the information written in the use mode storage area matches the purpose of file use. be. In this way, the disk data area can be widely used, since temporary files that store data only temporarily, such as floppy disk files on online terminals, are often empty or filled with unnecessary data. , and there is no need to manage memory areas. This will be explained in detail below with reference to the illustrated embodiments. FIG. 2 and FIG. 3 are diagrams showing an embodiment of the present invention.
The same parts as in FIG. 1 are given the same reference numerals. In this example, one common data file Fc is provided for each purpose of use. This file Fc is provided with a usage mode storage area RC ₁ and a data storage area RC ₂ (in this example, RC ₁ is the first record storage area, RC ₂
is the second and later record storage area), and the usage modes shown in the table below are written in area RC ₁ .

[Table] The usage status of the file Fc in each usage mode is as shown in the right column of the table above, and each data is allowed to be written to area RC ₂ when the usage mode is "Mission" or when the usage is for the same purpose. , is prohibited if it does not support the purpose of use. For example area
If the usage mode of RC ₁ is "data entry", the entry data D ₁ from the keyboard KB is stored in the area
It is possible to write to RC ₂ , but at this time the received data
Writing of D ₂ or conversion data D ₃ is prohibited.
Note that in the case of "missed" (this is written after the previous processing is completed), writing is free, but reading is of course impossible (meaningless). Table 2 shows whether processing that shares the file Fc is possible or not, depending on the mode of use, where a circle mark indicates that the process can be started, and an x mark indicates that the process cannot be started. This will be explained with reference to FIG. Keyboard for data entry
KB starts processing unit PU1. This allows the processing section
PU1 reads the mode code of mode register MR1,
Store in usage mode register OMR and start file access unit FAU. File access section
FAU registers the usage mode code mentioned above.
Read to RCR. Each register in comparison section CM
Compare and match the data stored in OMR and RCR according to Table 2, and if it is marked with a circle, it means that access is possible.
Respond to PU1. As a result, the processing unit PU1 accesses the floppy disk FP via the access unit FAU. At this time, the data stored in the OMR is written to the file. During this time, when a telegram downstream from the center arrives from the line, the line unit LN activates the processing unit PUN. The processing unit PUN responds to this,
The mode code of the process stored in advance in the mode register MR2 is transferred to the register OMR and the access unit FAU is activated. The access unit FAU reads the usage mode and processing mode code stored in the file as described above into the register RCR, and causes the comparator CM to compare them in the same manner as described above. In this case, the data stored in register RCR is
Since the entry mode code and the usage code indicate that it is in use, the processing unit PUN is notified by the comparison unit that startup is not possible. after that,
Entry business can be read and data D1 processing unit
When given to PU1, processing unit PU1 stores the data in register MR1 again in register OMR. However, the mode code for the same purpose is written in the file, and this matches in the comparison section, so
Entry data input next can be written to the file.

[Table] In the file usage control method described above, for example, the address of common file Fc is set to A-D, the capacity is set to about 300 in the above example (excluding RC ₁ ), and area RC ₂ is set. The data Di(i
=1 to 3) can be expanded to three times the amount that can be stored in one of the files _F1 to _F3 in FIG. Of course, it is possible that a request to store other data D ₂ and D ₃ may occur when data D ₁ is stored, but in such a case, the stored data should be immediately made unnecessary by sending the data, printing it out, etc. It is only necessary to temporarily wait for the accumulation of those data D ₂ and D ₃ ,
This does not pose much of a problem in practice. In addition, in Figure 2, the index track
Although the details of IT are not shown, the same information as the index track IT information in FIG. 1 is stored. In other words, the volume number (number information)
VOL, information A to D indicating the starting address to the ending address of the file portion Fc, record length, and other information are stored. Further, the storage start address of the file is fixed to address A. As described above, the present invention has the advantage that a borrowed memory such as a floppy disk, which has a limited storage capacity, can be efficiently shared for various purposes.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of how to use a conventional floppy disk, and FIGS. 2 and 3 are explanatory diagrams showing an embodiment of the present invention. In the figure, Fc is a common data file, RC ₁ is a usage mode storage area, and RC ₂ is a data storage area.

Claims (1)

[Claims] 1. A plurality of data input means including a keyboard or a line, a file having a data storage area for storing input data, an output means for outputting data stored in the file, and a data input means, It is equipped with a processing unit connected to a file and an output means, and the processing unit temporarily stores the data in the file and then processes the data input by any one of the plurality of input means. In a data input/output device that outputs data stored by an output means, a use mode storage area is provided at a specific searchable address corresponding to the data storage area of the file, and the data is stored in this use mode storage area. The usage state information of the data storage area in one of the entry mode, reception mode, and unused mode is stored, and the information in the usage mode storage area is read out, and the processing section uses the read information and the processing unit to store the file. A method is provided to check information indicating the purpose of use of the file, including data entry processing and message reception processing, according to the processing to be performed using the file, and one mode is used for the front storage area of one file. In addition to allocating a data storage area, when writing or reading data to a file, if the usage status information indicates that the data is in unused mode, the processing unit is allowed to write data, and the data that was stored first is Prohibits reading of data, checks the file usage purpose in the process and the mode information written in the usage mode storage area of the file, and if the file usage purpose and usage state match, the file is stored in this file. 1. A file usage control method characterized by controlling to permit reading and writing of all data stored in the file.