| 摘要 |
This invention is a video game system (10) which employs player operated switches (33) or a magnetic card reader (32) to permit the input of game codes (58) prior to or during game play (42, 44, 62). The game system verifies the validity of the codes (58) and, if valid, permits access to enhanced game features (44, 62) not otherwise available to the game player (42). The system is microprocessor based (16) and the valid codes are stored in read only memory (12) or nonvolatile random access memory (14). |
