The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 1985
Filed:
Apr. 08, 1982
Yasushi Fukunaga, Hitachi, JP;
Tadaaki Bandoh, Ibaraki, JP;
Ryosei Hiraoka, Hitachi, JP;
Hidekazu Matsumoto, Hitachi, JP;
Jushi Ide, Mito, JP;
Tetsuya Kawakami, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Engineering Co., Ltd., Tokyo, JP;
Abstract
In a multiprocessor system having a main memory and a plurality of processors connected through common address bus, data bus and answer bus for data transfer, a data transmission apparatus is provided for each of the main memory and the processors and includes bus request control lines for transferring bus request signals and bus control signals, and a bus controller for separately controlling selections of the address bus, the data bus and the answer bus in response to the signals on the bus request control lines and the request signal. Overlapped processing such as data write and data write answer or data read and data read answer in one cycle is possible.