JPS63228323A - System for recording draw type memory card - Google Patents

Abstract

PURPOSE:To write only a changed part at the time of changing a DRAW type memory card so as to omit writing an invariable part by writing initial data in an initial data area and writing changed data and additional data in one section area of changed data area as one data at every time it is necessary. CONSTITUTION:A map area 6, the initial data area 4A and the changed data areas 5A, 5A... are provided on the memory card. The initial data is written in the initial data area and the changed data is written in one section area of the changed data area as one data at every time it is necessary, then according to the changed data the information how the initial data in the initial data area is changed is written in the map area. In the case of reading out the data, the initial data is read out from the initial data area 4A so as to store the memory of a reading part, for example, and the changed data is read out from the changed data areas 5A, 5B... so as to sequentially correct the contents of the memory of the reading part by the changed data according to the stored contents of the map area 6, so that the desirable data can be obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a recording system for memory cards such as optical cards, IC cards, and magnetic cards, and in particular to a write-once type in which new data is written to the card while the card is in use. This relates to a memory card recording method.

[Conventional technology]

Figure 2 is a format diagram showing the recording method on a conventional write-once memory card.
1Fi reading section (3) is a memory area;
3) data A area (4A), data B area (4B),
Data C area (4°C), ... Data N area (4°C)
N).

With write-once memory cards, it is difficult to partially record data that has been recorded. Therefore, for example, if the initial data was written as data A in the data A area (4A) at the time of card issuance, in other words in the initial state of the card, it is necessary to change only part of data A. If this occurs, data A area (4A)
Since this change cannot be made in the data A area, all the data with the above-mentioned partial changes to the data A are newly written as data B to the data B area (4B), and the data A area (4B) is
It was necessary to perform invalidation processing on the data in A).

[Problem that the invention seeks to solve]

As mentioned above, in the conventional method, all new data must be written every time a part of the data needs to be changed.
There are problems in that it consumes a large memory area and takes a long time to write.

This invention was made to solve the above-mentioned problems, and provides a recording method for a write-once memory card that allows only the changed part to be written when it is necessary to change a part of the data. The purpose is to

[Means for solving problems]

In this invention, a memory card is provided with a map area, an initial data area, and a changed data area, initial data is written to the initial data area, and changed data is written as one piece of data in the changed data area each time the need arises. It was decided to write in one divided area and write information on how to change the initial data in the initial data area using this changed data in the map area.

[Effect]

When reading, the initial data is read from the initial data area and stored in the memory (not shown) of the reading section (2), for example, and then the changed data is read from the changed data area, and the data is read out according to the contents stored in the map area. Desired data can be obtained by sequentially modifying the contents of the memory of the reading section (2) using the change data.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a format diagram of a memory card showing an embodiment of the present invention. The same reference numerals as in FIG. 2 indicate the same or corresponding parts, and (4A) is the data A area. Therefore, it is called the initial data area (4A),
(5) stores changed data and additional data in the changed data area, (5A), (5B), (5C), .
... are the divided areas of the changed data area, respectively: changed data A area (5A), changed data B area (5B),
This is called the changed data C area (5C). +61Vi map area (6A).

(6B) . . . correspond to the change data A and B, respectively, and write information on which part of the initial data area (4A) should be modified according to the contents of 5A) and (5B).

In the initial state of the memory card, the initial data area (4A)
Initial data is written in the changed data area (5).
, the map area (6) is blank.

While using the memory card, if it becomes necessary to make changes (hereinafter "changes" include additions) to part of the contents of the initial data area (4A), the changes will be changed to changed data A and changed data C. The address of the changed data A area (5A) and the changed data A are stored in the area (5A).
information about which part of the initial data area (4A) is to be changed is written in (6A) of the pine area (6).

Next, when further changes are required, change the area (5B) and (
6B) Write to.

When reading this memory card, the memory of the reading section (2) (for example, an R
AM), read the contents of the initial data area (4A), and then change the contents of the above memory according to the contents of (5A) and (5B) according to the instructions of the contents of (6A) and (6B) of the map area (6). Then, you can obtain all the data after the desired changes.

〔Effect of the invention〕

As described above, according to the present invention, when changing a write-once memory card, it is possible to write only the changed part and omit writing the unchanged part, so the memory area can be used effectively and the time required for writing can be shortened. can do,

[Brief explanation of the drawing]

FIG. 1 is a format diagram showing an embodiment of the present invention, and FIG. 2 is a format diagram showing a conventional recording method on a write-once memory card. (1) is the writing section, (2) is the reading section, (3) is the memory area, (4A) is the initial data area, (5) is the modified data area, f61 tri? Tubu area, (5A), (5
B), (5C) H Separate area of changed data area. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] In a recording method of a write-once memory card in which initial data is written in an initial state, and modified data and additional data to the initial data are written as necessary during use, the memory card is provided with a map area and , an initial data area,
A modified data area is provided, the initial data is written to the initial data area, and each time the modified data and additional data are required, they are written as one data to one partitioned area in the modified data area, and In this case, the necessary information regarding the changed data is written to the above map area, including the address of the partitioned area where the changed data is stored, and when reading the memory card, the initial data in the above initial data area is read, and then the above A recording method for a write-once memory card, characterized in that information in a map area is read out, and in accordance with the read contents, changes and additions to the initial data are executed using data read out from a change data area.