Multiplex communications – Wide area network – Packet switching
Patent
1992-07-07
1995-07-11
Bowler, Alyssa H.
Multiplex communications
Wide area network
Packet switching
395325, 395800, 370 79, G06F 1328
Patent
active
054329108
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.
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Barker Kenneth J.
Calhoun George M.
Calvignac Jean
Castel Rene
Dispensa Jean C.
Bowler Alyssa H.
Follansbee John A.
International Business Machines - Corporation
Timar John J.
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