| 摘要 |
PROBLEM TO BE SOLVED: To effectively prevent the quilt to get unjust profit through the illegal alteration or exchange of external ROM in a controller for game machine on which the external ROM for storing various control programs for various hardwares and a microcomputer circuit are mounted like a PACHINKO stand, a slot machine or the like in recent years. SOLUTION: A microcomputer circuit 1 is constituted of a one-chip microcomputer provided with a fuse type PROM 12, an inspection program for adding the control program data of all the addresses of an external ROM 2 and the regular arithmetic result Tc in the case that the external ROM 2 is proper are written in that fuse type PROM 12, and when starting a system, a CPU 11 is let execute the inspection program. Then, the inspection operated results Xn and Tc are compared and only in the case of Xn=Tc, an operating mode is started. |
