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1. 发明专利

JPH05234225A 失效
公开(公告)号：JPH05234225A
公开(公告)日：1993-09-10
申请号：JP3178592
申请日：1992-02-19
申请人： HITACHI LTD , HITACHI PROCESS COMPUTER ENG
发明人： SETO SHINYA , AONUMA MASAHISA
IPC分类号： G11B17/04 , G11B17/047
摘要： PURPOSE:To secure compatibility improving operational convenience and to contrive miniaturization and light weight of the device by sharing a single component with a tray loadable of a different size disk and recording and reproducing disks which are different in size. CONSTITUTION:A flexible disk setting tray 302 is equipped with flexible disk mounting parts for 3.5 in., 5 in. and 8 in. 401, 402 and 403 and disk mounting sensors 404, 405 and 506. Then, information is recorded and reproduced on a different size flexible disk by sharing a single magnetic head and a motor for moving the magnetic head. Consequently, as against such a conventional device that a medium inserting hole, a magnetic head and a head moving motor, etc., are provided in plural sets respectively corresponding to different sizes, the number of parts can be reduced, and the structure is simplified and hence miniaturization and light weight of the device can be contrived.

2. 发明专利

JPS62166425A COMMAND START SYSTEM 失效
公开(公告)号：JPS62166425A
公开(公告)日：1987-07-22
申请号：JP794386
申请日：1986-01-20
申请人： HITACHI LTD , HITACHI PROCESS COMPUTER ENG
发明人： HORIE MASANORI , OKA TOSHIHISA , AONUMA MASAHISA
IPC分类号： G06F15/00 , G06F9/06
摘要： PURPOSE:To judge a corresponding command interpreter corresponding to a high speed by searching command names of plural command interpreters according to an input from a terminal and transferring an input character to the interpreter having the coincident name. CONSTITUTION:Interpreters 1 and 2 shares an interterminal data transfer program 3 to read data from terminals. A command name table 4 contains command names of the interpreters 1 and 2 distinctively and the program 3 refers to its contents. The interpreters 1 and 2 indicates an input request from a terminal device 5 to the program 3 after an electronic computer system becomes usable. The program 3 when accepting this command request fetch an input command character string and collates the command name with the contents of the table 4 to decide which interpreter has a command requested, thereby transferring the command character string fetched from the device 5 to the corresponding interpreter 5.

3. 发明专利

JPS5538651A ADDRESS EXTENSION MECHANISM 失效
公开(公告)号：JPS5538651A
公开(公告)日：1980-03-18
申请号：JP11072478
申请日：1978-09-11
申请人： HITACHI LTD
发明人： AONUMA MASAHISA
IPC分类号： G06F12/02
摘要： PURPOSE:To extend addresses by attaining access to another logical address space by providing a special register which modifies the operand part of an instruction. CONSTITUTION:When FF3 is set corresponding to an address command clock, an AND gate is opened to generate an address converted into a physical page address through a conversion map corresponding to a logical space number by address register 1 formed of a shift register. On the other hand, a corresponding AND gate is open by FF3 until FF3 is reset and then set next, and access to another space corresponding to B address register 2 modifying an operand part is attained, so that the extension of physical sddresses can be performed.

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