Input/output interface connector circuit for repowering and isol

Details Input/output interface connector circuit for repowering and isol Input/output interface connector circuit for repowering and isol

1977-01-06

1979-03-13

Shaw, Gareth D.

Boots, shoes, and leggings

G06F 300

Patent

active

041445651

ABSTRACT:
In a data processing system which includes a base central processing unit, channel, and input/output (I/O) interface to which peripheral devices may be attached, a special attachment is disclosed. The attachment made to the base I/O interface includes connector circuitry which is required when the signals on the input/output interface must be repowered to peripheral devices in an expansion input/output unit, power isolation must be provided between a base data processing system and I/O expansion unit, or a remote peripheral device is to be attached to the base data processing system I/O interface. The connector circuit includes logic which responds to the normal I/O interface signals to energize drivers in the connector circuit to achieve repowering of signals on bidirectional signal lines and unidirectional signal lines.

REFERENCES:
patent: 3408632 (1968-10-01), Hauck
patent: 3639909 (1972-02-01), Hauck et al.
patent: 3815099 (1974-06-01), Cohen et al.
patent: 3911400 (1975-10-01), Levy et al.

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