A data processing control apparatus comprises a main memory for storing a plurality of record data serially arranged with a record positioning code between the record data, each record data including a plurality of word data serially arranged with a word positioning code between the word data, the word data each including at least one character data; and a processing memory means having a row/column matrix which is address designated by the outputs of row and column counters for permitting each word data in the record data to be stored in its address. A specific row of a heading column in the matrix in the processing memory means is address designated to permit the address position data in this row to be sequentially shifted in a row direction. Specific codes, each written in an address position following a final character data, in the word data are counted by a counter while an address shift is effected in a column direction from an address position in the specific row. A word order memory is adapted to beforehand store a numerical value corresponding to the order of a word data to be selected from the record data and a coincidence circuit is adapted to detect a coincidence between the number of specific codes counted by the counter and a numerical value stored in the word order memory. When a coincidence output is generated from the coincidence circuit a data readout from the main memory to the processing memory means is inhibited by the coincidence output of the coincidence circuit and only a word data corresponding to a selected word order is delivered to the data processing memory.
According to the present invention, a header includes delete history data (counter) area where a delete history of the logically subsequent record header is written in. By sequentially referring to record headers by using this data, a logical storing order of records is not destroyed even if a delete instruction is executed. In addition, the header has physical position data. Accordingly, when a squeeze instruction is executed after the delete instruction, the logical storing order of records is not destroyed and an empty area in the block can be effectively utilized.
An address generating circuit for accessing a RAM for a CD-ROM device includes line and column counters for counting lines and columns of addresses in the RAM. The address generating circuit also has a memory unit for storing a part of storage addresses of the RAM. The line counter produces a line count value and updates the same. The column counter produces a column count value and updates the same. An accessing unit is coupled to the line counter and the memory unit for accessing the memory unit in response to the line count value to thereby read out a different one of the part of storage addresses stored in the memory unit each time the line count value is updated. An adding unit is coupled to the memory unit and the column counter for adding the column count value to a storage address read out from the memory unit to generate an access address, which is being changed each time the line count value or the column count value is updated to access each of the storage addresses of the RAM.
All the combinations of upper-level parent parts and lower-level child parts constituting parent-to-child relationships in the structure of the parts are registered in a predetermined file in advance. When an arbitrary upper-level parent part is designated, all the child parts which are associated with the parent part are extracted by referring to the file. It is then determined whether a combination of parts including each extracted part as a parent part is present or not. If it is present, the referring operation is repeated again by setting each extracted child part as a parent part. When it is determined that a combination is not present, a corresponding child part is output.
Partial forms constituting parts of a slip or the like are stored in a printing apparatus side. A partial form corresponding to the type of data output from a computer is read out, and the data is overlaid with the partial form to be printed. One slip is formed by combining a plurality of partial forms. Therefore, a slip can be formed in accordance with the number and type of data, and data can be properly fitted in a form and printed. A large variety of types of forms can be printed in accordance with the type or the like of data to be printed.
Prior to retrieval of records from a data file, keywords, as boundary values of condition ranges, which are input as record retrieval condition ranges are sorted and arranged in a given order. Identification information indicating that boundary ranges each defined by adjacent keywords of the keywords arranged in the given order are included in the retrieval condition ranges are assigned in correspondence with the boundary ranges. Thereafter, records are retrieved in accordance with the keywords in the boundary ranges in which the identification information are assigned. Therefore, even if designated record retrieval condition ranges overlap, ranges in which records are read out from the data file are limited to required ranges, and the same records are not read out a plurality of times.
