1
Chikahiko Izumi: Memory control system using plural buffer address arrays. Hitachi, Craig & Antonelli, November 1, 1977: US04056844 (73 worldwide citation)

In a data processing system in which a single main memory is shared by two or more basic processing units, each unit is provided with a first buffer address array which stores the addresses of data stored in the associated buffer memory and is searched by this processing unit and with second buffer ...


2
Shun Kawabe, Chikahiko Izumi, Toshihiko Odaka: General purpose data processing apparatus for processing vector instructions. Hitachi, Craig and Antonelli, October 23, 1979: US04172287 (30 worldwide citation)

A general purpose data processing apparatus is provided which is adapted also for processing vector instructions. An instruction control unit reads instructions out of a memory and decodes them. If the instructions are different from vector instructions, an arithmetic unit performs the instructed op ...


3
Mamoru Hinai, Chikahiko Izumi, Kazuo Hibi: Multiple virtual storage control system. Hitachi, Craig and Antonelli, April 20, 1982: US04326248 (23 worldwide citation)

A multiple virtual storage control system for a data processing system for handling a plurality of virtual spaces is disclosed. Virtual addresses indicative of addresses in the virtual spaces are translated to real addresses by a translation table. When a new virtual space is established by setting ...


4
Kanji Kubo, Chikahiko Izumi: Storage system using comparison and merger of encached data and update data at buffer to cache to maintain data integrity. Hitachi, Antonelli Terry & Wands, December 23, 1986: US04631668 (18 worldwide citation)

A storage system includes a storage for storing data, and a store buffer for temporarily buffering data before storing it into the storage. A store request is applied to the store buffer, and store data accompanied by the store request is applied to the store buffer. When a fetch request for the sto ...


5
Masahiro Hashimoto, Kenichi Wada, Chikahiko Izumi: Data shunting and recovering device. Hitachi, Antonelli Terry & Wands, May 24, 1983: US04385365 (17 worldwide citation)

A data shunting and recovering device is provided to shunt and hold the data stored in a register and its address before writing the register during a delay period following generation of an interrupt. This data is then restored into the register when an instruction of recovering is given. Therefore ...


6
Kanji Kubo, Tsugio Momose, Chikahiko Izumi: Apparatus for invalidating the content of an instruction buffer by program store compare check. Hitachi, Antonelli Terry & Wands, February 19, 1985: US04500959 (14 worldwide citation)

In a data processing system having an instruction buffer, inconsistency between an instruction stored in a main memory and the same instruction present in the instruction buffer occurs at the time of a store operation to the memory if the instruction supplied to the store area of the main memory pre ...


7
Humio Goto, Chikahiko Izumi, Riujiro Imai: Data processing apparatus having diagnosis function. Hitachi, Craig & Antonelli, June 15, 1982: US04335425 (9 worldwide citation)

A data processing apparatus incorporating a function referred to as the scan-out diagnosis function for reading out and checking sequentially internal states of the apparatus. In addition to the address designating means for the scan-out diagnosis function, an address register is provided which is v ...


8
Noriaki Hashimoto, Kanji Kubo, Chikahiko Izumi: Storage system having buffer storage. Hitachi, Antonelli Terry & Wands, December 24, 1985: US04561071 (3 worldwide citation)

This storage system is designed to refer to a translation lookaside buffer, a buffer address array and a buffer storage in parallel. The translation lookaside buffer translates a logical address requesting memory access into a real address. The buffer storage retains part of the data retained in blo ...