International Business Machines Corporation

James Walter Bode

Frank A Montegari

Randall J Easter

A computer system having multiple processors wired to a common MCM substrate in which insertable processor chips themselves carry fencing appropriate to their function on the multi-chip module in which they are inserted for optimizing needed functions with fencing of interfaces to permit cryptographic functions to be added by inserting a cryptographic by providing each processor of the multichip module with its own cryptographic coprocessor as needed enabling alternative configurations of the computer system using a common substrate but differing processing units and cryptographic coprocessors.

Cryptographic processor with interchangeable units

A high speed low power logic circuit, said logic circuit having at least first and second input terminals and an output terminal, said logic circuit accepting first and second binary inputs, respectively, at said first and second input terminals and providing a binary output at said output terminal, said binary output being a predetermined logical function of said first and second binary inputs, said logic circuit comprising: a first transistor, a second transistor and a first resistor serially connected between a first source of potential and a second source of potential, said first transistor being of first conductivity type and having an emitter, base and collector, said second transistor being of a second conductivity type opposite to said first conductivity type and having an emitter base and collector; a capacitor connected in parallel with said first resistor; a second resistor connected between said base of said second transistor and said second source of potential; first connections means passively connecting in common said base of said first transistor and said base of said second transistor; first and second diodes, said first and second diodes being respectively connected between one of said first and second input terminals and said first connection means; and second connection means connecting said output terminal to said collector of said first transistor and said collector of said second transistor.

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Wappingers Falls, NY, United States of America

James Walter Bode