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:
Jul. 11, 1995
Filed:
Jul. 07, 1992
Kenneth J Barker, Cary, NC (US);
George M Calhoun, Raleigh, NC (US);
Jean Calvignac, La Gaude, FR;
Rene Castel, Tourrettes-Sur-Loup, FR;
Jean C Dispensa, Saint-Jeannet, FR;
Yves Huchet, Nice, FR;
Edward S Suffern, Chapel Hill, NC (US);
Ruggero Ulivastro, Nice, FR;
International Business Machines Corporation, Armonk, NY (US);
Abstract
The connection capability of a communication controller is extended. The communication controller includes a central control unit CCU, running a network control program NCP stored in a memory having a direct memory access facility through a DMA bus. The input/output bus of the communication controller and DMA bus are connected to line adapters, and channel adapters and a controller extension through a coupler which allows additional adapters to be connected to the controller. At initialization, a table is built into a coupler memory, which is then used in steady state mode for controlling the transmission of the messages to the additional users and the reception of the messages from the additional users, by improving the buffer unchaining and chaining processes into the NCP memory.