Method and apparatus for buffer chaining in a communications con

Details Method and apparatus for buffer chaining in a communications con Method and apparatus for buffer chaining in a communications con

1991-01-23

1994-05-31

Shaw, Dale M.

395250, G06F 900

Patent

active

053176928

ABSTRACT:
Method and apparatus in a communications controller to transfer data between a host computer and the controller. The communications controller includes a channel adapter (CA) and a central control unit (CCU) for controlling the operation of the CA. In response to a request from the CCU, the channel adapter transfers data between the host computer and the channel adapter to or from a linked list of buffers until all messages contained in the linked list have been transferred. Only after all messages in the present transmission have been transferred, the CA interrupts the CCU to signal completion. In a preferred embodiment, the channel adapter includes a microprocessor and a read-only-memory containing programmed instructions for controlling the microprocessor. Together, the microprocessor under control of the read-only-memory instructions form an apparatus for carrying out the method.

REFERENCES:
patent: 4509113 (1985-04-01), Heath
patent: 4672570 (1987-06-01), Benken
patent: 4954983 (1990-09-01), Klingman
patent: 5077655 (1991-12-01), Jinzaki
patent: 5101477 (1992-03-01), Casper et al.

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