Internal control information modification mode null of

摘要

PURPOSE:To improve the production efficiency by restarting the processing in accordance with contents of a register at the time of coincidence between a data signal and a preliminarily discriminated wrong data signal. CONSTITUTION:In the case of control and observation of control information stored in a control ROM 3, the address signal from a logic part 7 is read out to a ROM address line 11 when the address direction control signal of an address direction control line 13 is in the low level, and this address signal is read out to a ROM data line 10 when the data direction control signal of a data direction control line 12 is in the low level, and the address signal is checked by an LSI tester or the like. If a ROM data signal corresponding to this ROM address signal coincides with a preliminarily discriminated wrong data signal, the processing of an information processor 1A is temporarily stopped. The data signal coinciding with the wrong data signal or the pertinent address signal is changed and is stored in a micro instruction fetch register 4, and thereafter, the processing is restarted in accordance with contents of the register 4. Thus, the efficiency is improved.