JPH057741B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a data storage device such as a so-called memo calculator. [Prior Art and its Problems] Conventionally, when storing tabular data using a personal computer or the like, it was necessary to set the table configuration such as the number of records, the number of items, and the number of characters of each item in advance. Therefore, key operations for data input are extremely troublesome, and the system is very difficult for the user to use. [Object of the Invention] The present invention has been made in view of the above points, and provides a data storage device in which there is no need to define the structure of a table when storing tabular data, and data input is extremely easy. The purpose is to provide [Summary of the Invention] The present invention inputs and stores tabular data by key operation, and the number of data records (rows)
, a pointer for storing the number of items (columns), and a specific key for instructing data writing, and by operating the write instruction key, input data is stored with an item delimiter code attached, and the item pointer is updated at the same time. , based on the value of the item pointer at the end of inputting the first record.
The pointer for data input for the second and subsequent records is controlled so that data can be input by simple key operations. [Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a key input section, which includes a numeric keypad and alphanumeric keys, as well as a DATA key 2a for switching between input mode and output mode, a FILE key 2b for writing/reading a file name,
It is equipped with an EXE key 2c for instructing data division and reading record names, a pointer movement key 2d for sequentially reading data, and the like. Data input from the key input section 1 is sent to the CPU 3. This CPU 3 includes a mode flag MF and an accumulator A (A ₀ , A ₁ ). The mode flag MF stores input mode or output mode, and the accumulator A stores data sent from pointers CP and MP in the memory management section 4. The memory management unit 4 manages the data memory 5 in accordance with instructions from the CPU 3, and includes an address register MPA in addition to the pointers CP and MP. Above pointer CP
consists of _CPR , where the number of records of table data stored in the data memory 5 is set, and _CPI, where the number of items is set. Also a pointer
MP is used to indicate where the currently specified address is in the table stored in the data memory 5, and MP _R is used to set the number of records.
and MP _I in which the number of items is set. Then, the address register MPA is set to the address indicated by the pointer MP, and
The data memory 5 is addressed by this content. In addition, the CPU 3 includes a comparison/judgment section 6,
A delimiter code generating section 7 and a comment statement generating section 8 are connected. The comparison/judgment section 6 compares the data from the CPU 3 and the data from the memory management section 4 and outputs the comparison/judgment result to the CPU 3.
Further, under the control of the CPU 3, the delimiter code generating section 7 generates an item delimiter code indicating the end of an item and a record delimiter code indicating the end of a record. The comment generation unit 8 generates a comment such as “ITEM1?” under the control of the CPU 3 according to the count value of the pointer MP, and displays it on the display unit 9. Further, the data read from the data memory 5 is displayed on the display section 9.
It is also sent to the delimiter code detection section 10. The delimiter code detecting section 10 detects the two types of delimiter codes, item and record, from the data output from the data memory 5, and outputs each detection signal to the memory management section 4. Next, the operation of the above embodiment will be explained. For example, assume that the following table of results shown in Table 1 is stored.

〔Effect of the invention〕

As described above, according to the present invention, when inputting tabular data, the number of items at the time of inputting the first record is memorized, and data input for the second and subsequent records is based on this number of items. Therefore, when storing tabular data, there is no need to define the structure of the table, and it is possible to provide a data storage device in which data input operations are extremely easy.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. FIG. 1 is a circuit diagram, FIG. 2 is a flowchart showing a data writing operation, and FIG. 3 is a diagram showing memory contents and display contents in response to key operations during data writing. FIGS. 4 and 5 are flowcharts showing data reading operations, and FIG. 6 is a diagram showing changes in the pointer and display contents in response to key operations during data reading. 1...Key input section, 3...CPU, 4...Memory management section, 5...Data memory, 6...Comparison/
Judgment section, 7... Delimiter code generation section, 8... Comment statement generation section, 9... Display section, 10... Delimiter code detection section, _CPR , _CPR , MP _R , MP _I ... Pointer,
MPA...Address register.

Claims (1)

[Scope of Claims] 1. In a data storage device that stores a plurality of records, with data constituted by a plurality of items as one record, an item pointer that specifies an item, a record pointer that specifies a record, and data writing. a write instruction key that instructs execution; a data write means that adds an item delimiter code to the input data and stores it by operating the write instruction key after data input; Item pointer updating means for updating an item pointer; Item counting means for incrementing a count by operating the write instruction key only when the record pointer specifies the first record; and control means for updating the record pointer and simultaneously resetting the item pointer when the value of the item pointer that is sequentially updated exceeds the count value stored by the item counting means during data input. A data storage device characterized in that tabular data can be input simply by operating instruction keys.