Multiplex communications – Wide area network – Packet switching
Patent
1983-06-14
1989-06-06
Griffin, Robert L.
Multiplex communications
Wide area network
Packet switching
H04J 302
Patent
active
048377856
ABSTRACT:
A data transfer system with improved data transfer efficiency is provided. The system consists of a data interchange bus having two data transfer signal paths, an address signal path, and a plurality of control signal paths. Data interchange adapters and memory interchange adapters are coupled to the bus for transferring data thereover. A data interchange adapter transfers data on the first data signal path to another data interchange adapter or to a memory interchange adapter for storage in a memory device. A memory interchange adapter transfers data obtained from a memory device on the second data signal path to a data interchange adapter. Data transfers on the two data signal paths may be made simultaneously. Data transfers on both data signal paths are made synchronously. When an interchange adapter has data to be transferred, it provides an access request signal to a data interchange bus controller which intermittently latches all outstanding access requests, examines them, and produces a sequence of grant signals, each satisfying one of the latched request signals. When the sequence is completed, the controller again latches the access requests which had been raised during the prior latching and granting procedure. The data interchange adapter is further provided with the capability of coupling to two other data buses while coupled to the data interchange bus and includes interface and control circuitry for routing signals between any two of the three buses.
REFERENCES:
patent: 3462742 (1969-08-01), Miller et al.
patent: 3573852 (1971-04-01), Watson et al.
patent: 3916108 (1975-10-01), Schwartz
patent: 3919483 (1975-11-01), Gindi et al.
patent: 4078228 (1978-03-01), Miyazaki
patent: 4115850 (1978-09-01), Houston et al.
patent: 4128882 (1978-12-01), Dennis
patent: 4131945 (1978-12-01), Richardson et al.
patent: 4156932 (1979-05-01), Robinson et al.
patent: 4161024 (1979-07-01), Joyce et al.
patent: 4172281 (1979-10-01), Gordon
patent: 4447813 (1984-05-01), O'Pray
Aptec Computer Systems, Inc.
Birdwell William A.
Chin Wellington
Griffin Robert L.
LandOfFree
Data transfer system and method of operation thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data transfer system and method of operation thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data transfer system and method of operation thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-45586