Bull Hn Information Systems, Inc.

Henry W Maddox

Arthur Peters

Donald J Rathbun

William L Saltmarsh

Douglas J Deangelis

Douglas J De Angelis

A monitor for selectively detecting and recording conditions at selected points within a system during operation includes trigger logic connected from first selected points and responsive to selected conditions occurring at each of the first points for generating corresponding trigger outputs representing the occurrence of the selected conditions and a silo bank memory having a sub-silo for each second point. Each sub-silo has a first sub-silo segment with data inputs connected from the corresponding second point for recording data from the second point and a second sub-silo segment with data inputs connected from a time stamp generator. Silo write control logic is responsive to the trigger outputs to write the data representing the conditions present at each second point and the time stamp output of the time stamp generator into the corresponding sub-silo segments of the silo bank upon occurrence of a corresponding trigger output so that each condition recorded in the silo bank memory as the result of a trigger output has associated with it the time stamp count representing the relative time of occurrence of the trigger output.

Bus monitor with time stamp means for independently capturing and

A monitor device for selectively detecting and recording conditions at selected points within a system during operation, including a trigger enable memory for storing selectable trigger enabling codes wherein each code corresponds to a trigger signal representing the occurrence of a corresponding condition to be detected, a trigger generation device connected from first selected points and responsive to selected conditions thereupon for generating the trigger signals representing the occurrence of selected conditions, a trigger output device responsive to the enabling codes and the trigger signals for providing trigger outputs upon the occurrence of a trigger signal corresponding to a selected trigger enabling code, and a silo bank memory connected from second selected points and responsive to the trigger outputs for recording conditions present at the second points.

Bus monitor with selective capture of independently occuring events from

A monitoring means for selectively detecting and recording signals representing at selected points within a system, includes trigger generation logic responsive to selected bus signals for generating trigger signals representing the occurrence of selected conditions, and a recording memory for recording the conditions thereupon, a trigger selection logic for selecting trigger outputs corresponding to the trigger signals. The trigger selection logic includes a trigger enabling memory for storing selectable trigger enabling codes, wherein each enabling code corresponds to a trigger signal, and trigger output logic responsive to the trigger enabling codes and to the trigger signals for providing trigger outputs. The trigger enabling codes include bus enabling codes representing selected conditions on a bus of the system, trigger sequence enabling codes corresponding to sequential combinations of trigger signals and external trigger enabling codes corresponding to triggers external to the system. The enabling codes may select trigger signals to be used in logical AND or OR functions in generating a trigger output or in substitution for a bus trigger signal.

Bus monitor with means for selectively capturing trigger conditions

A monitor for selectively detecting and recording conditions at selected points within a system includes a trigger memory for storing patterns of trigger signals, wherein each pattern of trigger signals corresponds to a selected condition to be detected on first points of the system. The trigger memory includes a first port having a read address input connected from the first points and a data output connected to trigger output logic for providing patterns of trigger signals corresponding to the conditions to be detected. Each pattern of trigger signals is stored in the trigger memory location whose address corresponds to a pattern of signals from the first points representing the corresponding condition to be detected. The trigger memory is a dual port memory having a second port with a write address input and a data input for receiving trigger patterns to be stored therein. The method for generating the trigger patterns includes generating a first trigger pattern map and, from the first map, a second trigger pattern map to be written into a trigger memory which includes a plurality of submemories, wherein each submemory stores a portion of the trigger patterns.

Growing community of inventors

Franklin, MA, United States of America

Henry W Maddox