Data stream concentrator providing attribute data storage and gr

Details Data stream concentrator providing attribute data storage and gr Data stream concentrator providing attribute data storage and gr

1993-05-11

1994-08-09

Herndon, Heather R.

Multiplex communications

Wide area network

Packet switching

395166, 395650, 370 60, G06F 1562

Patent

active

053374100

ABSTRACT:
A method and apparatus for merging command/data packets from a plurality of parallel processing units into a concentrated data stream, while also providing for pipeline attribute data storage, direct user access to the pipeline, redirection of the pipeline, data insertion into the pipeline and pipeline diagnostics. The data from a plurality of parallel processing units is recombined in the same order as originally transmitted and then inputted into a buffer for entry into the pipeline. Attribute switching commands are deciphered by the concentrator of the invention and selectively stored and retrieved from the pipeline. New attribute values are passed downstream on command when they are different from existing attributes, or conversely, the concentrator may be overridden by the user so that attribute values supplied by the user may be stored and passed downstream. This technique thus minimizes repetitiveness in attribute switching. Further diagnostics capabilities are provided whereby a user of the graphics processing system is given the ability to plug the pipeline and independently check different data sources and destinations to see if they are functioning properly. This process is further enhanced by the capability of the invention to check the status of each of the concentrator elements in parallel to determine if they are ready before performing any data transfer.

REFERENCES:
patent: 4847755 (1989-07-01), Morrison et al.
patent: 4862392 (1989-08-01), Steiner
patent: 5034946 (1991-07-01), Smith
patent: 5142677 (1992-08-01), Ehlig et al.
A Parallel Processor Architecture for Graphics Arithmetic Operations, John G. Torborg, Computer Graphics, vol. 21, No. 4, Jul. 1987; pp. 197-204.

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