Patent ID: 8454433

Claim:
A device for reading information data storage medium, comprising: a player detection device for detecting a presence of a player playing at a gaming machine; a carrying device for carrying a removable information data recording medium to a housing position or an eject position; a recording medium detection device for detecting that the information data recording medium exists at the eject position; a reader/writer for reading or writing amount-of-money information relating to a cash for a game to be played at a gaming machine from or into the information data recording medium; and a controller that is programmed to execute processing operations of: (A) determining whether or not the information data recording medium exists at the eject position by means of the recording medium detection device; (B) determining whether or not the player exists by means of the player detection device; (C) carrying the information data recording medium from the eject position to the housing position by means of the carrying device when it is determined that the information data recording medium exists at the eject position and when it is determined that the player does not exist; (E) writing the amount-of-money information relating to the cash for the game to be played at the gaming machine into the information data recording medium; (F) executing a mini-game when an amount of money indicated by the amount-of-money information that is written into the information data recording medium is less than a predetermined number, and according to a result of the executed mini-game, changing the amount-of-money information; and (G) carrying the information data recording medium to the eject position by means of the carrying device when the amount of money indicated by the amount-of-money information that is written into the information data recording medium is equal to or greater than the predetermined number.