Patent ID: 6128687
Filing Date: 2000-10-03
Classification: G06F

Abstract:
A circuit for determining a state of a selected resource, comprising:a register having a plurality of bit positions, each bit position for storing state information corresponding to one of a plurality of resources; anda multiplexer circuit, having control inputs for receiving an encoded address that selects one of the plurality of resources, having a plurality of data inputs for receiving the state information of each of the plurality of bit positions of the register, the multiplexer circuit for conducting, to a result output, the state information of the one of the bit positions of the register responsive to the encoded address;wherein the multiplexer circuit comprises a plurality of pass gates, each having a conductive path coupled on a first side to receive a corresponding one of the bit positions of the register, and each having a control terminal controlled by the encoded address;and wherein multiple ones of the plurality of pass gates have their conductive paths connected together on a second side thereof in wired-OR fashion.