Shadow register file for instruction rollback
October 22, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3736566 Instruction retry mechanism for a data processing system Computer systems Radiation hardened register file Method and apparatus for diagnosing faults in a processor having a pipeline architecture Radiation circumvention technique Apparatus for redundant operation of modules in a multiprocessing system Method and storage device for saving the computer status during interrupt Checkpoint retry mechanism Diagnostic circiut for digital systems Inventors
ApplicationNo. 114267 filed on 08/30/1993US Classes:700/79, Having protection or reliability feature714/15State recovery (i.e., process or data file)ExaminersPrimary: Trammell, James P.Attorney, Agent or FirmInternational ClassG05B 009/02AbstractA fault-tolerant computer system having shadow registers for storing the contents of a primary array into a shadow array at the completion of a stored instruction execution. This is accomplished in one clock cycle with all registers being shadowed simultaneously. During rollback of execution steps for a checkpoint retry, the shadow register files provide a signal cycle unload of the shadow array into the primary array. LSSD latches are used in the shadow register file. | |
