David G Gibbs

US Patent:

6873330, Mar 29, 2005

Filed:

Mar 4, 2002

Appl. No.:

10/090490

Inventors:

Wayne Eric Burk - San Jose CA, US
David Gibbs - Oxnard CA, US
David Kehlet - Los Altos CA, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

G06F015/16

US Classification:

345503, 714732, 714733

Abstract:

In one embodiment, a computer system includes a first component configured to output data on a bus in response to a request for data from a second component. The data output by the first component may include both the requested data and unrequested data, and the unrequested data may have an unpredictable value. A controller coupled to the bus may be configured to replace the unrequested data with data that has a predictable value. A signature analysis register included in the second component is configured to capture the requested data and the predictable data output by the controller. Thus, the signature captured in the second component may be predictable, despite the unpredictable data output by the first component.

US Patent:

7203878, Apr 10, 2007

Filed:

Jul 19, 2002

Appl. No.:

10/200054

Inventors:

Nathaniel David Naegle - Pleasanton CA, US
David W. Gibbs - Oxnard CA, US

Assignee:

Sun Microsystems, Inc. - Santa Clara CA

International Classification:

G01R 31/28

US Classification:

714732, 714 39, 714819

Abstract:

A computer system may include several integrated circuits and a routing circuit configured to route several data streams between the integrated circuits. The routing circuit includes several input ports, several output ports, and a signature analysis register coupled to one of the output ports. The signature analysis register is configured to collect data conveyed via the output port dependent upon whether the signature analysis register receives a tag identifying one of the plurality of data streams.