Hitachi, Ltd.

Hitachi Maxell, Limited

Takehisa Hayashi

Kenichi Ishibashi

Tetsuya Mochida

Toshio Doi

Hideki Murayama

Akira Yamagiwa

Koichi Okazawa

Nobukazu Kondo

Seiji Kaneko

Hideaki Gemma

Satoshi Yoshizawa

Mitsuo Asai

Hiroshi Iwamoto

Hiroshi Yashiro

Tsutomu Goto

Akira Tanaka

Naoki Hamanaka

Noboru Masuda

Yasuhiro Ishii

Takeshi Aimoto

Teruo Tanaka

Hidenori Inouchi

Shigeo Nagashima

Tetsuhiko Okada

Masabumi Shibata

Hirotoshi Tanaka

Kimitoshi Yamada

Masahiro Kitano

Kouki Noguchi

Naohiko Irie

Tetsuo Nakano

Tsuyoshi Watanabe

Akira Masaki

Akira Muramatsu

Kazuo Nakao

Kazuhiro Hashimoto

Ikuo Yoshihara

Kazuo Horikawa

Hiroshi Ohguro

Haruyuki Nakayama

Shoichi Murase

Youichi Tanaka

Shinichi Tanabe

Kenji Nakajima

Shoji Shukuri

Yasunari Umemoto

Atsushi Saito

Katsuhiro Shimohigashi

Hitoshi Matsushima

Kiichi Ueyanagi

Yasuo Wada

Tadahiko Nishimukai

Makoto Hanawa

Toshiro Takahashi

Kanji Kato

Hisayuki Higuchi

Toshitsugu Takekuma

Makoto Suzuki

Yoshihiro Takiyasu

Masayoshi Yagyu

Minoru Yamada

Nobuo Kotera

Tsuneya Kurihara

Koichi Shibata

Suguru Tachibana

Mitsuru Akizawa

Norikazu Hashimoto

Toshihiro Okabe

Kazumichi Mitsusada

Masahiro Abe

Toru Horimoto

Michio Asano

Moritoshi Yasunaga

Takeshi Takemoto

Atsushi Ugajin

Masahiko Yamauchi

Masaru Igawa

Yasushi Hatta

Akira Kito

Hirofumi Fujita

Tatsuhiro Aida

Koichiro Omada

Yuzo Hirai

Nobutoshi Matsunaga

Mikiko Sato

In a data processing system, a plurality of modules connected to a system bus thereof are assigned with identifiers. When a source module initiates a split read access to another module, the source module sends an address of the access destination module and an identifier of the source module. When sending a response to the source module, the destination module returns response data and the identifier of the source module thereto. Checking the identifier from the destination module, the source module determines the response data returned as a response to the initiated access.

Bus control system

A computer system having a plurality of computers connected to each other by a computer coupling mechanism. Each computer includes a processor, memory, I/O device, disk control mechanism, computer coupling network adapter, disk requirement processing section connected to a system bus, and a disk connected to a disk control mechanism. The disk requirement processing section controls the disk, in response to a processing requirement for the disk from one of the processors of the other computers, based on structural definition information. The structural definition information describes a structure of the computer system. The computer system may be a loosely-coupled computer system.

Computer system having a plurality of computers each providing a shared storage access processing mechanism for controlling local/remote access to shared storage devices

In a multi-processor system interconnecting processor units, memory units, and input/output units connected to input/output devices via a crossbar switch having a plurality of ports, the transmitter of each processor unit has a circuit for determining a destination of an access request in the following manner. For an access request to a main memory, the access request is transferred to all processor units and one memory unit storing the data to be accessed. For an access request to a memory mapped register of the input/output device, the access request is broadcast to all input/output units. For an access request to a memory mapped register belonging to any one of the processor units, memory units, and input/output units, the access request is broadcast to all units via the crossbar switch.

Multi-processor system and its network

A control method of controlling a computer for controlling a resource connected to the computer and shared by a plurality of programs included in the computer includes the steps of storing a control information ID indicating a storage area in the main memory storing control information concerning access between a certain program and the resource in an OS space of a main memory, storing the control information ID in an adaptor connected to the main memory via a bus, and taking out the control information from the storage area included in the OS space, by using the control information ID stored in the adapter. In the case where the adapter runs short of a storage area, information that the adapter runs short of a storage area in the main memory is conveyed via the bus. By using the control information thus taken out, the resource is controlled.

Method and apparatus for controlling resource

Information processing system

Apparatus for interconnecting logic boards is provided with a backplane, a plurality of logic boards connected to the backplane, and a plurality of interconnecting boards, connected to the backplane, for interconnecting the plurality of logic boards. In the apparatus, the plurality of logic boards are connected to the backplane with the logic boards in vertical position at right angles with the interconnecting boards and a specified distance away from the interconnecting boards.

Apparatus for interconnecting logic boards

A memory disc sharing method in which a plurality of computers share a memory disc through a network, wherein a command in accordance with which the memory disc is accessed is received by a network interface apparatus, and when a requested computer to which a request of the command has been made is any of other computers, the command is transmitted to the any of other computers, and when the requested computer is a computer concerned, the command is stored in a memory disc command queue. The network interface apparatus retrieves the command from the memory disc command queue, and executes the processing of reading out/writing data from/to the memory disc in the computer concerned when a requesting computer from which a request of the command has been made is the computer concerned, and carries out the data transfer between the memory disc in the computer concerned and the requesting computer when the requesting computer is any of other computers.

Memory disk sharing method and its implementing apparatus

A semiconductor integrated circuit system having a function of automatically adjusting an output resistance value with reference to a temperature of an LSI which is operating. When a count value obtained from a counter by counting the output of a timer becomes equal to a predetermined value, a temperature sensor measures temperatures of LSIs. If a temperature fluctuation measured from a previous measured value is greater than a predetermined width, then a control apparatus issues an output resistance value adjustment request signal to output resistance adjustment units of the LSIs. When receiving the output resistance value adjustment request signal, the output resistance value adjustment units stop the signal transmission between the LSIs, adjust output resistance values of output circuits in such a manner that the output resistance values are matched with a characteristic impedance of a transmission line, and maintains the adjusted output resistance values until the output resistance value adjustment units receive next output resistance value adjustment request signal.

Semiconductor integrated circuit system having function of automatically

In a video storage and delivery apparatus and corresponding system, video data items are simultaneously supplied to a plurality of users while guaranteeing the time axis and the picture quality of the video data. The apparatus includes a frame address table which indicates a storage location in the apparatus of each frame of video data to start a special reproduction or a reproduction at a desired frame and a control unit controlling a switch bus connecting a plurality of video storage and delivery apparatuses to a plurality of channels so as to conduct data transfers via the switch bus between the apparatuses and between video reproduction devices of the users. From an optical disk data storage storing video data, a plurality of video data items are read in a timesharing fashion to be temporarily stored in a magnetic disk device or a semiconductor memory, thereby delivering the video data items therefrom to the users.

Video storage and delivery apparatus and system

Growing community of inventors

Sagamihara, Japan

Takehisa Hayashi