04751639 is referenced by 81 patents and cites 12 patents.

A fault tolerant data processing system includes a pair of processors for simultaneously executing commands for processing data, a memory, and a data transmission bus between the processors and the memory voer which the processors may fetch data from and write data to the memory. A comparison circuit is included between the processors for comparing the data fetched and written by the processors. A rollback module is responsive to the comparison circuit for rolling back the operation of the processors to the beginning of a presently executing command in the event of a miscomparison by the comparison circuit.

Title
Virtual command rollback in a fault tolerant data processing system
Application Number
6/748361
Publication Number
4751639
Application Date
June 24, 1985
Publication Date
June 14, 1988
Inventor
Chiman R Patel
Escondido
CA, US
Victor F Cole
Santee
CA, US
Rolfe D Armstrong
Escondido
CA, US
Jon M Corcoran
Ramona
CA, US
Agent
Floyd A Gonzalez
Edward Dugas
Wilbert Hawk Jr
Assignee
NCR Corporation
OH, US
IPC
G06F 11/08
View Original Source