JPH02236754A - Information processor - Google Patents

Abstract

PURPOSE:To improve the maintainability of a specific data block by applying a check processing on the specific data block selectively at every record. CONSTITUTION:A file name to be written on a memory card 6 is designated, and one record is read out from the memory card. When it is designated that a checksum processing is performed by information that is to be set as the directory of the memory card, addition without code is performed on read out data in unit of byte, and after that, the complement on one is taken, and the data of one record is written, then, the value of a checksum is also written. Also, when it is designated that no checksum is performed, the data of one record is written on the card as it is, and it is decided that all the files are written, and the same processing is repeated when the file remains, and the processing is completed after all the files are written. Thus, saving/loading with an equipment main body on the memory card in file unit is performed by applying the checksum processing. Thereby, the maintainability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information processing device that correctly writes information to a storage device.

[Prior Art] Conventionally, file-by-file access to a memory card of a storage device involves reading the media specifications from the card itself, and
This was done by logically managing files according to the specifications.

[Problem that the invention seeks to solve] However,
Since the memory card of the storage device is used under various environments, the reliability of the memory itself of the memory card cannot be said to be reliable. Reliability is particularly required when used for business purposes, but the conventional example described above has the disadvantage that no data security measures are taken when accessing memory cards in record units. there were.

[Means for Solving the Problems (and Effects)] According to the present invention, in an information processing apparatus that writes information to a storage means, when writing information to the storage means, writing of information and An information processing device is provided, comprising a selection means for selecting whether or not to write a check processing result, and means for writing information in the storage means and writing check information of the information based on the selection of the selection means. .

[Embodiment] FIG. 1 is an external view showing one embodiment of the present invention. In the figure, l is a handy terminal of an information processing device. 2 is the keyboard. 3 is a display device. 4 is the printer section. A reader/writer section 5 writes information to a memory card 6 of a removable storage device and reads information from the card 6. 5a is a card insertion slot. Reference numeral 6 denotes a memory card, which has a directory and an entity part, and the directory has a file name and information that requires checking processing. 7 is a power switch.

FIG. 2 shows a block diagram of the external view of FIG. 1.

In the figure, the same parts as in Figure 1 are given the same numbers. In the figure, 8 is the CPU of the processing section. Reference numeral 9 denotes a ROM as a control memory that stores the control procedure of the present invention shown in FIG. 3. 10 is a memory RAM in which processing data and the like are stored. 11 is the control of the reader/writer. 12
is a bus that transfers data, addresses, and control signals. The operation of the above embodiment is illustrated in FIG. This will be explained with reference to B.

In FIG. 3A, in step S1 the file name to be written to the memory card 6 is specified from the keyboard, and in step S2 one record is read from the memory card,
When it is specified by the information in the memory card directory to perform a checksum in step S3, in step S4, the data read in step S2 is added without a sign in units of bytes, and then the complement of l is taken. After writing data for one record in step S5, its checksum value is also written. If the information in the directory of the memory card specifies that the checksum is not to be performed in step S3, one record is written to the card as is, and in step S7 it is determined whether all the files have been written, and if there are any remaining files. If it is, the process returns to step S2 and ends after all files have been written. In FIG. 3B, in step S8 the file to be read from the memory card 6 is designated from the keyboard, and in step S8
A checksum is performed in step 9, and the written file is determined based on the information in the directory. If the file has been subjected to checksum processing, data for one record and the checksum value are extracted from the card in step SIO. read out. In step Stt, checksum is again performed on the data for one record in the same manner as in step S4 of FIG. Let's do it. At this time, if the two values do not match, an error message is displayed on the display 3 in step S15.
Display in .

Also, if the two match, the data will be loaded to the device itself. Then, in step S7, it is determined whether all the files have been loaded. If there are still files left, the process returns to step 510, and when all the files have been loaded, the process ends. on the other hand,
If it is determined in step S9 that the file has not been subjected to checksum processing, one record at a time is read from the card and loaded in step S16.17, and when all are loaded, the process ends.

In this embodiment, integrity is improved by performing checksum processing when saving/loading files to/from the device into a memory card, and if there is an abnormality, it will be notified when the file is loaded. Although the explanation has been made on the assumption that whether or not to perform the check process is selectively written in the directory, it may also be input from the keyboard.

[Effects of the Invention] As explained above, by selectively performing check processing for each record on a specific data block, the integrity of the data block is improved, and it is possible to perform check processing for each block. It is efficient because it is possible. Furthermore, since the present invention performs a check process for each record, even if an abnormality is found in a certain record during the check process, this is guaranteed for other data, so the reliability can be improved. It is effective in terms of improvement.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment according to the present invention Fig. 2 is a block diagram of the embodiment shown in Fig. 1 Fig. 3 A, B
Figure 6 shows the control procedure Memory card 8 CPU 9 ROM 10 RAM Bay 2 Figure 6

Claims (1)

[Scope of Claims] In an information processing device that writes information to a storage means, when writing information to the storage means, a selection means for selecting whether to write the information and write a check processing result of the information; An information processing apparatus comprising means for writing information into the storage means and writing check information of the information based on the selection by the selection means.