Limiting use of coin operated games machine

摘要

The games machine has a microcomputer based controller (4) that is coupled to the symbol generating displays (6) that are operated in a pseudo random cycle. The supply to the controller is coupled (9) to a security module (10). The module has a microprocessor and a memory in a circuit chip and the memory contains a secret security control algorithm relating to period of use. When a specified maximum date is reached the system is disabled. An Independent claim is included for a device for carrying out the method.