Tandem Computers Incorporated

Larry Leonard Lamano

Nikhil A Mehta

Richard Alan Vrba

James Stevens Klecka

Kyran Wilfred Fey, Jr

A fault-tolerant computer system employing multiple CPUs executing the same instruction stream under independent clock cycle timing. The CPUs deterministically execute the instructions internally until input or output operations require access to memory or devices which are not synchronous with the local CPU clock. The CPUs are forced to take the same number of CPU clock cycles to complete the I/O operations. When the I/O operation is complete the internal processing of the instruction stream continues in a manner which is clock aligned in each of the multiple CPUs but which may be separate in real time due to oscillator drift. Accumulated drift is periodically removed by a timed interrupt which forces resynchronization of the CPUs in real time.

Growing community of inventors

Austin, TX, United States of America

Larry Leonard Lamano