The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 04, 2003
Filed:
Dec. 23, 1999
Applicant:
Inventors:
Assignee:
Bull HN Information Systems Inc., Billerica, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 9/44 ; G06F 9/45 ; G06F 1/128 ;
U.S. Cl.
CPC ...
G06F 9/44 ; G06F 9/45 ; G06F 1/128 ;
Abstract
A processor ( ) contains a Trace RAM ( ) for tracing internal processor signals and operands. A first trace mode separately traces microcode instruction execution and cache controller execution. Selectable groups of signals are traced from both the cache controller ( ) and the arithmetic (AX) processor ( ). A second trace mode selectively traces full operand words that result from microcode instruction ( ). Each microcode instruction word ( ) has a trace enable bit ( ) that when enabled causes the results of that microcode instruction ( ) to be recorded in the Trace RAM ( ).