Boots – shoes – and leggings
Patent
1976-06-30
1977-09-13
Chapnick, Melvin B.
Boots, shoes, and leggings
G06F 906, G06F 916, G06F 1300
Patent
active
040486710
ABSTRACT:
Apparatus for signalling the occurrence of a match between an address that is supplied to a control store and an address that is to be watched for in a data processing system that executes several instruction streams concurrently. The apparatus signals the occurrence of a storage accessing operation at a location that is uniquely identified only by a virtual address that is longer than the actual address used in accessing the store. Means is provided for comparing the actual address used in accessing the store with the corresponding portion of the complete address, and means is provided for recording the location of an address to be watched for in a particular frame of the store and for signalling a match that occurs in such a frame. The apparatus is useful for testing the operation of the data processing system by relating a recurring malfunction of the system to the execution of an instruction at the address that is watched for.
REFERENCES:
patent: 3286239 (1966-11-01), Thompson et al.
patent: 3693165 (1972-09-01), Reiley et al.
patent: 3703708 (1972-11-01), Foster
patent: 3949379 (1976-04-01), Ball
Callahan Robert William
Kauffman Paul Eugene
Mitchell, Jr. Matthew Joseph
Chapnick Melvin B.
IBM Corporation
Robertson W. S.
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