Microcode testing method and apparatus therefor

摘要

A microcode testing method and apparatus in which parity check data is added to a microcode and the microcode with the parity check data are stored in a memory (1), the microcode with the parity check data outputted from the memory are supplied to a parity check unit (2) for parity checking and error detecting, and if an error is detected, the error detection result from an error notice unit (3, 4) is notified to the circuit portion whose operation is influenced by the microcode for which an error is detected.