Store data buffer control system

摘要

A data processing system using a store data buffer control device includes plural store data buffers and the data from a processor is temporarily stored in the store data buffers and then transferred to a memory. A shift register is used to trace the storing requests from the processor so that the storing requests re-executable in the instruction re-execution taking place at the time of a fault occurring are distinguished from the storing requests not re-executable in the same operation. The data held in the store data buffers corresponding to the re-executable requests is invalidated while the data held in the store data buffers corresponding to the non-re-executable requests is kept valid.