Boots – shoes – and leggings
Patent
1991-07-01
1993-08-03
Harrell, Robert B.
Boots, shoes, and leggings
364DIG2, 364950, 3649503, G06F 1300
Patent
active
052336980
ABSTRACT:
An information processing system includes a first data processing device 10 and a second data processing device 12 each of which is capable of independent instruction execution during instruction cycles having a period which is a multiple of a periodic unit clock signal period. The devices are disclosed to be an arithmetic unit and a central processor which are coupled together by an interface 14. Each of the data processing devices include a clock generation device 180 having an input coupled to the unit clock signal for generating an associated instruction cycle clock signal which has a period which is a multiple of the unit clock signal period. The clock generation device is further operable for suspending the generation of the instruction cycle clock signal and for beginning a next instruction cycle clock signal in synchronism with a transition of the unit clock signal. The devices 10 and 12 each request synchronization of their respective clocks which are then automatically synchronized to the other device's clock during a transition of the unit clock, allowing for instructions and operands to be synchronously passed between the central processor to the arithmetic unit.
REFERENCES:
patent: 4862407 (1989-08-01), Fette et al.
patent: 4943915 (1990-07-01), Wilhelm et al.
patent: 4991078 (1991-02-01), Wilhelm et al.
patent: 4992938 (1991-02-01), Cocke et al.
patent: 5062040 (1991-10-01), Bishop et al.
Caracappa David N.
Harrell Robert B.
Wang Laboratories, Inc.
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