| 摘要 |
PROBLEM TO BE SOLVED: To provide a computer and the like that can perform correction, such as addition or deletion of instruction data despite a simple structure. SOLUTION: A microcomputer 100 comprises a ROM 120 storing an instruction data column, a CPU 110 having an IR 111 and a PC 112 showing a specific instruction address SIA, instruction addition registers 131 etc. capable of storing added instruction data and an added address, an added address comparing circuit 140 for comparing the specific instruction address SIA and the added address, and an instruction selector 150. If the added address comparing circuit 140 detects that the specific instruction address SIA and the added address are unequal, the instruction selector 150 outputs specific instruction data SID to the IR 111. If the specific instruction address SIA and the added address are equal, the PC 112 stops updating the specific instruction address SIA, and the instruction selector 150 selects the added instruction data to output them to the IR 111. COPYRIGHT: (C)2004,JPO
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