Boots – shoes – and leggings
Patent
1988-09-20
1990-09-04
Chan, Eddie P.
Boots, shoes, and leggings
36443111, 3642316, 3642413, 3642713, G06F 946
Patent
active
049549480
ABSTRACT:
Disclosed is a microprocessor operating system having a program which includes a plurality of tasks requiring periodic execution by the system, and wherein each task is comprised of a plurality of associated subtasks. The system executes the tasks in a orderly fashion by: (A) providing a time variable which is periodically updated to represent a measurement of time; (B) setting the time variable to a predetermined time period during which a first task may be executed; (C) determining whether or not the predetermined time period has lapsed; (D) executing at least one of the subtasks of the first task if the predetermined time period has not lapsed, and then proceeding to step c; and (e) executing another portion of program if the predetermined time period has lapsed, and then proceeding to step c before executing another subtask associated with the first task. When a task having a higher priority than the first task requires execution, the subtask being executing is completed and the higher priority task is executed. Once the first task is returned to for execution, the next subtask is executed. The procedure continually executes all the subtasks associated with the first task.
REFERENCES:
patent: 4337513 (1982-06-01), Furuhashi
patent: 4363097 (1982-12-01), Amano et al.
patent: 4482962 (1984-11-01), Amano et al.
patent: 4589093 (1986-05-01), Ippolito
patent: 4593280 (1986-06-01), Grow
"Operating System Concepts" James L. Peterson, Abraham Silberschatz, Adison-Wesley Publishing Co., Mass 1983 pp. 91-129.
Hira Gerald M.
Nolan Michael P.
Sheahen Dana M.
Wilson Pamela L.
Chan Eddie P.
Crawford Robert J.
Motorola Inc.
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