Line turn circuit for data link

Details Line turn circuit for data link Line turn circuit for data link

1980-05-07

1982-11-02

Springborn, Harvey E.

Boots, shoes, and leggings

G06F 312

Patent

active

043576818

ABSTRACT:
A data link processor, which is basically a peripheral-controller for interfacing a main host computer system to a peripheral terminal unit, forms part of an I/O subsystem in which a base module unit houses a plurality of such peripheral-controllers (data link processors). Each base module carries a distribution control circuit card which provides a communication interface between the main host computer and the peripheral-controller. A special line turn-around logic circuit is used to control the direction of data flow as between the distribution control circuit card and the data link processor. In one direction, data may flow from the distribution control circuit card (originating from the main host computer) into the data link processor. In the other direction, information and status data can flow from the data link processor to the distribution control circuit card (and then to the main host computer).

REFERENCES:
patent: 3651487 (1972-03-01), Washington
patent: 4074352 (1978-02-01), Cook et al.
patent: 4124889 (1978-11-01), Kaufman et al.

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