| 摘要 |
PROBLEM TO BE SOLVED: To prevent a fraudulent operation from outside by extracting the value of an initial random number caused by a timing when a game ball enters a specific winning hole or passes a specific passing hole, and changing the renewal mode of a winning random number based on the extracted initial random number value. SOLUTION: When a starting hole switch 36a is on in winning of a hit ball, a winning random number value is extracted to compare with the winning judgement value in a main control board 30. At that time, the renewal mode of the winning random number is added with one in next interruption regardless of the winning judgement result. And, the renewal mode is modified using a winning initial value in the renewed memory in winning into the starting hole. For example, if a winning random number extracted in winning into the starting hole is '5' and the value of an initial random number in memory renewal is '148', the renewal of the winning random number is made by adding one in every interruption after next. If the value exceeds the maximum value '249', the memory renewed '148' becomes the winning initial value. Thereby, a fraudulent operation can be prevented. |
