| 摘要 |
PROBLEM TO BE SOLVED: To prevent the manufacture of any illegal part such as a back ROM or a hanging substrate by actually invalidating decoding a game program even when a control board and a ciphered game program are already hanged over to the third person. SOLUTION: A ciphered game program fetched from the outside part is decoded by using a key preliminarily stored in a storing means, and the decoded game program is written in a non-volatile storage means, and then the key is eliminated or converted to any meaningless code. For example, even when a control board and the ciphered game program are transferred to the third person, the 'key' necessary for decoding can not be obtained, and the decoding of the game program can not be actually validated. Thus, it is possible to contribute to the healthy development of the general game field by preventing the manufacture of any illegal part such as a back ROM or a hanging substrate. |
