| 摘要 |
PROBLEM TO BE SOLVED: To prevent fraudulent conduct of replacing a sub ROM, while making it difficult to detect measures against fraudulence from the appearance.SOLUTION: The game machine includes: a main control board 50 for controlling the progress of a game, a first sub control board 80 for performing AT lotteries, and a second sub control board 90 for controlling the output of presentations. The first sub control board 80 stores presentation data and sends at least a part of the presentation data to the second sub control board 90 as authentication data. The second sub control board 90 stores in advance the authentication data equivalent to the authentication data sent from the first sub control board 80, and receives the authentication data sent from the first sub control board 80 for a collation with the stored authentication data. The second sub control board 90 performs prescribed abnormality detection processing upon a necessary condition that the collation result of the authentication data is determined as abnormal. |
