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:
Oct. 13, 1992
Filed:
May. 25, 1988
Osamu Kunisaki, Yokohama, JP;
Tosikazu Yasue, Yokohama, JP;
Shiro Oishi, Hadano, JP;
Yuuji Saeki, Hadano, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A terminal controller detects state of a plurality of terminal devices by polling system, and the detected state is in a terminal management table possessed by the terminal controller and each terminal device, and the communication processing is performed corresponding to the table content. The terminal controller and each terminal device comprise respectively a main processor connected through a bus to a main memory and a communication control adapter. The communication control adapter is composed of a local processor, a local memory and a communication data send/receive circuit, and terminal management table region is provided on the main memory and the local memory. The local processor executes management of the terminal management table, and rewrites the terminal management information on the local memory and at the same time transfers the terminal management information onto the main memory by the DMA function provided on the communication control adapter.