External memory having an authenticating processor and method of operating same

摘要: A system for determining a truth comprises main unit which is employed together with an external memory, example, ROM cartridge, floppy disk or the like. The operated following program contained in memory. In memory and unit, same semiconductor devices, microprocessors are incorporated respectively, former device acts as key latter lock device. synchronized each other, executing arithmetic operation program. results of this exchanged two devices compare result by their own respectively. If both coincide, software determined to be true allowed operate, but if not false left reset intact. Thereby, processing information apparatus disabled when true.