Browse Prior Art Database

Message Distribute Mechanism

IP.com Disclosure Number: IPCOM000075848D
Original Publication Date: 1971-Nov-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Marcus, P: AUTHOR [+2]

Abstract

This description is directed to a multibit cyclic shift register, including a number of stations having access to and from each shift register position as it "passes" the station, and a "central" monitor.

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Message Distribute Mechanism

This description is directed to a multibit cyclic shift register, including a number of stations having access to and from each shift register position as it "passes" the station, and a "central" monitor.

The object is for any station to be able to send information to any other station, via the shift register. Another object is for the information to arrive at the receiving station uninterrupted by information from any other sending station, and for the sending station to be uninterrupted by information from any other sending station. This scheme will operate in the most efficient manner, by obtaining maximum utilization of the shift registers and stations.

Assume N shift registers constantly cycling, and M stations (Fig. 1). Each shift-register position has a space allocation for data and a destination address. Each station has a receiving and transmitting register, each with the same capacity. Transfer of data in either direction occurs between a station register and shift register.

Central consists of each station address and a record of which ones are locked in use -- essentially a O/I indication, "1" signifying "locked." (Fig. 3).

When a station, say A, is ready to send, to a station, say J, station A loads into its transmitting register the destination J address and coded information signifying "Start of Message". (Fig. 4). Central can recognize two codes: Start of Message and End of Message. If both the sending and destination...