Program event recorder and data processing system

Details Program event recorder and data processing system Program event recorder and data processing system

1973-12-10

1976-01-06

Morrison, Malcolm A.

Communications: electrical

Digital comparator systems

G06f 1100

Patent

active

039316114

ABSTRACT:
Disclosed is a method and apparatus for program event recording in a data processing system and is used, for example, in debugging programs. A program event occurs whenever an address in the data processing system falls within a range between a control lower address (DTCL) and a control upper address (DTCU). The system detects a program event without degrading system performance using carry-lookahead adder structures which implement four inequality relationships.

REFERENCES:
patent: 3264615 (1966-08-01), Case et al.
patent: 3340539 (1967-09-01), Sims, Jr.
patent: 3573855 (1971-04-01), Cragon et al.
patent: 3585606 (1971-06-01), Evans et al.
patent: 3742458 (1973-06-01), Inoue et al.

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