High speed interconnect unit for digital data processing system

Abstract From the Canadian patent

A digital data processing system transfers information with an external device through an interconnect unit over a bus which includes separates sets of lines for transferring control information and transferring user information. The user information lines include a bidirectional information transfer lines and unidirectional antiparallel lines for transferring direction control signals and synchronization signals between the interconnect unit and the external device, the direction control signals identifying the direction of transfer over the information transfer lines and, the synchronization signals identifying when the transmitting unit has transmitted the signals and when the receiving …