Interface circuit for communicating between two data highways

Details Interface circuit for communicating between two data highways Interface circuit for communicating between two data highways

1975-04-28

1977-09-06

Chapnick, Melvin B.

Boots, shoes, and leggings

G06F 304

Patent

active

040471624

ABSTRACT:
An interface circuit for use in a data transmission system is designed to be used not only between a highway and a device but also to link highways and can be commanded to enter a status in which commands sent to it on one highway are modified and sent out as commands on a second highway so that a controller device on the one highway can control devices not only on that highway but also on the second highway, with extension, if desired, to a third highway or beyond. To achieve this, the interface circuit has two ports each for connection to a respective one of two substantially identical highways, and status control means responsive to signals received at either port to establish different statuses of the interface. For inter-highway communication, the status control means is responsive to a command signal of particular form at either port to produce a modified command signal at the other port.

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patent: 3768074 (1973-10-01), Sharp et al.
patent: 3815099 (1974-06-01), Cohen et al.

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