Information handling apparatus having multiple ports distributed around shifting register rings

Claim 1

An information handling apparatus including a plurality of ports, each for receiving input signals and transmitting corresponding output signals, a plurality of port control units, each of which is connected to at least one of said ports, and information storage means connected to all of the port control units, the information storage means including several pluralities of closed rings formed of groups of shifting register stages connected in series, each ring having the same number of stages and having a plurality of junctions at which the last stage of one group of shifting register stages is connected directly to the first stage of the next group of shifting register stages around the particular ring, the port control units being connected directly to respective corresponding junctions in each plurality of rings, and stepping means for synchronously and continuously recirculating information around the rings, the information consisting of groups of digits, the digits of each group being respectively stored in the rings of a plurality of rings and propagated in parallel by the stepping means so as to appear in parallel at corresponding junctions of the particular plurality of rings, and each port control unit being connected to the stepping means and to all of the rings and including means enabling it to read a selected group of digits in parallel by accessing the corresponding junctions on the rings at an instant associated with the selected group of digits, and by selecting one of the pluralities from among the several pluralities.