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11. 发明专利

JPS63257043A FILE CONTROL SYSTEM 失效
公开(公告)号：JPS63257043A
公开(公告)日：1988-10-24
申请号：JP9085687
申请日：1987-04-15
申请人： HITACHI LTD
发明人： NISHIO NAOKO , TSUCHIDA HACHIO
IPC分类号： G06F3/06 , G06F12/00
摘要： PURPOSE:To easily perform a processing to invalidate outputted data, by providing a means which selects and designates the updating of the position information of the final data of a file by an application program. CONSTITUTION:The application program of a terminal equipment 4 opens the file 5 which stores reception data at the time of starting reception by an OPEN command. The reception data hereafter is outputted to the file 5 by a PUT command. When the data up to the final data is received normally in such a way, the file is closed by issuing a CLOSE command. Meanwhile, when no data up to the final data is received, the CLOSE command in which the designation of EOD update suppression is applied is issued. In such a way, data management closes the file without performing the update of an EOD. Consequently, the reception data stored in the file can be invalidated.

12. 发明专利

JPS6292028A PREVENTING SYSTEM FOR COPYING OF PROGRAM 失效
公开(公告)号：JPS6292028A
公开(公告)日：1987-04-27
申请号：JP23113485
申请日：1985-10-18
申请人： HITACHI LTD
发明人： TSUCHIDA HACHIO , NISHIO NAOKO
IPC分类号： G06F12/14 , G06F9/06 , G06F21/02 , G06F21/22 , G06F21/24
摘要： PURPOSE:To prevent surely the program copy without requiring complicated processing by loading a program only when a text mark to be copied means a text. CONSTITUTION:A prescribed number of information called directories which are needed for control of programs are stored in the head part of a file. A directory contains a program name 21, a storing address 22 on a medium, a program size 23 occupied on the medium, a copy invalidation mark 24 and other information. The mark 24 defined by the directory of the program to be loaded is checked. Then the program is loaded as long as the invalidity of copy is not shown. While a copy text mark is checked when the validity of copy is shown. When a text is shown, the program is loaded. The the program loading processing is finished in an abnormal state while regarding the program as a copied medium in case the result of loading does not show the text.

13. 发明专利

JPH0568026B2 失效
公开(公告)号：JPH0568026B2
公开(公告)日：1993-09-28
申请号：JP1604487
申请日：1987-01-28
申请人： HITACHI LTD
发明人： NISHIO NAOKO , TSUCHIDA HACHIO
IPC分类号： G06F3/06 , G11B20/10

14. 发明专利

JPH02150927A ERROR CORRECTION SYSTEM 失效
公开(公告)号：JPH02150927A
公开(公告)日：1990-06-11
申请号：JP30215588
申请日：1988-12-01
申请人： HITACHI LTD
发明人： KOBAYASHI SHIGEO , KOMORI KAZUHIKO , KAWASHITA TOMOYOSHI , TASAKA HIROTAKA , TSUCHIDA HACHIO
IPC分类号： G06F11/10
摘要： PURPOSE:To improve the reliability of a error correction system without deteriorating the availability of a memory by deciding the past errors via a comparator and therefore correcting the errors within a range where the error correction rate is kept under a level allowable with the system. CONSTITUTION:In a normal mode a data control part 25 prevents an error detection/correction control part 15 from correcting errors. Thus the part 15 is limited just to detect the errors, and the read data on the reception data read into an A data buffer 14 is set at a B data buffer 21. When an error is detected, the part 25 outputs an error correction grant command 25a with an error correction mode set. Then the data is read again and the data obtained after correction of the error is set at the buffer 14 and a C data buffer 22 respectively. Then the data on both buffers 21 and 22 are compared with each other by a comparator 23. When a burst error having the bits less than the prescribed number of bits is decided, the data on the buffer 22 is handled as the data undergone the correct error correction. While the other data undergo the error processes. Thus it is possible to improve the system reliability without deteriorating the memory availability.

15. 发明专利

JPS6269333A FILE SHARING SYSTEM 失效
公开(公告)号：JPS6269333A
公开(公告)日：1987-03-30
申请号：JP20862385
申请日：1985-09-24
申请人： HITACHI LTD
发明人： NISHIO NAOKO , TSUCHIDA HACHIO
IPC分类号： G06F12/00
摘要： PURPOSE:To attain the input of another record in the same block with update mode of another program by recording the holding unit when a record is supplied at the update mode. CONSTITUTION:A file information table contains the program information 1, the file names 2 and the holding information 3. A program is registered every time the file is opened. A flag 4 consists of a holding flag and an access flag to another program. The holding flag is turned on when the record shown by a block number 5 and a record pointer 6 is held. While the access flag to another program is turned on when the records in the same block are updated by another program. The number 5 indicates a specific block in the file to which the record to be held belongs. While the pointer 6 indicates the record position in the block.

16. 发明专利

JPS61228537A MULTIPLEX INDEX ORDER FORMATION FILE 失效
公开(公告)号：JPS61228537A
公开(公告)日：1986-10-11
申请号：JP6894685
申请日：1985-04-03
申请人： HITACHI LTD
发明人： NISHIO NAOKO , TSUCHIDA HACHIO
IPC分类号： G06F12/00
摘要： PURPOSE:To perform the file opening process in a short period by providing the control information on the position and length of of index keys and the index areas into a file area and to perform the control just with a single file label. CONSTITUTION:A file label 1 of a file structure contains the file name, the file type and the area information showing the start and the end of a file area. Then a multiplex index order formation file is defined when the file type indicates a character M. When the file type shows M, the control information 2 is provided to an area shown at the beginning of the file area. Then a main key index part 3 and subkey (1) index part 4-(8) index part 11 which are defined by the information 2 are arrayed successively. The part 3 contains the data record and the index part of the main key; while the parts 4-11 contain the no-key index parts including no data record. Thus the file opening process is performed in a short time.

17. 发明专利

JPS58207160A Magnetic disk control system 失效
标题翻译：磁盘控制系统
公开(公告)号：JPS58207160A
公开(公告)日：1983-12-02
申请号：JP9024482
申请日：1982-05-27
申请人： Hitachi Ltd
发明人： TSUCHIDA HACHIO
IPC分类号： G11B27/10 , G06F3/06
摘要： PURPOSE: To decrease the distance required for accessing and then to reduce the revolution queuing time, by calculating a middle sector address from the start and final sector address and storing the calculated sector address in the form of the bit information.
CONSTITUTION: The sector start and final addresses to which an access is given are written to registers 10 and 11. A process sector register 13 turns on only the bit that corresponds to an access subject address after turning off all bits. A magnetic disk is read to check whether the bit of the register 13 corresponding to the read-out sector address is turned on or not. If this bit is on, the data is transferred by a DMA. After this transfer is over, the bit of the register 13 is turned off. It is possible to start reading at any sector when the data is read out of the continuous sectors.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：通过从起始和最终扇区地址计算一个中间扇区地址，并以位信息的形式存储计算的扇区地址，减少访问所需的距离，然后减少旋转排队时间。构成：给予寄存器10和11的扇区起始地址和最终地址被写入寄存器10和11.处理扇区寄存器13在关闭所有位之后仅接通对应于访问对象地址的位。读取磁盘以检查对应于读出扇区地址的寄存器13的位是否被接通。如果该位为ON，则数据由DMA传输。在该传送结束之后，寄存器13的位被关闭。当从连续扇区读出数据时，可以在任何扇区开始读取。

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