Method and an apparatus for resolving identical address requests

Details Method and an apparatus for resolving identical address requests Method and an apparatus for resolving identical address requests

1987-12-07

1989-09-05

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307518, 307470, 307514, H03K 1728, H03K 526

Patent

active

048642436

ABSTRACT:
An improvement to an arbitration circuit in a dual port memory circuit device is disclosed. The arbitration circuit resolves near simultaneous identical address requests on the two ports. The arbitration circuit has a first state where the identical address request is resolved by permitting address requests to the first address port and denying writing of data to the second port and a second state where the identical address request is resolved by permitting address requests to the second address port and denying writing of data to the first port. The arbitration circuit also has a meta-state where the arbitration circuit is unable to resolve the identical address request. The improvement of the present invention detects the arbitration circuit in the meta-state and forcing the arbitration circuit into the first state in response to the detection of the meta-state.

REFERENCES:
patent: 4282489 (1981-08-01), DeRienzo
patent: 4502014 (1985-02-01), Bismarck
patent: 4620118 (1986-10-01), Barber

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