Abstract: An electronic visual indication system for a motor vehicle which indicates whether the motor vehicle has current motor vehicle insurance coverage. The electronic visual indication system is configured so that it is detectable from the outside of the automobile to enable law enforcement officials to enforce the state statutes requiring motor vehicle operators to have current motor vehicle insurance without stopping the vehicle and manually checking the motor vehicle operator's proof of insurance. In one embodiment of the invention, the electronic vehicle indication system is enabled by, for example, a smart card, magnetic card or the like (collectively referred to as a validation card), which enables the electronic vehicle indication system for a predetermined period of time. The validation card is adapted to be validated by an insurance agent for a validation period of the insurance coverage for the motor vehicle.

Abstract: A warning system for notifying others that a cellular telephone is in use in a vehicle. The system includes a transmitter electrically coupled to a cellular telephone for transmitting an in-use signal when the telephone is activated. A receiver for receiving the in-use signal. An indicator, responsive to the receiver receiving the in-use signal, for visually indicating that a cellular telephone is in use in a vehicle.

Abstract: A memory system includes a memory unit with plural addressable storage locations, a connector arrangement for detachably electrically coupling the memory unit to a computer, and a decoding arrangement for determining whether a computer memory address is within a range of addresses to which the memory unit is to respond, the decoding arrangement including a base address register storing a value representing the first address in the range and a size register defining the number of addresses in the range.

Abstract: A computer system reads data from selected locations in a memory while each address applied to the memory is temporarily stored in a register. If a data error is detected, two flipflops are set, one of which can generate and interrupt the central processing unit, and the other of which disables an AND gate through which a load signal is applied to the register in order to disable the register. An arrangement for resetting the second flipflop includes a third flipflop which is set and reset respectively at the beginning and end of each input/output cycle and which has an output coupled to one input of an AND gate having a further input to which is applied a signal selectively actuable by the central processing unit, the output of the AND gate and a system reset signal being applied to inputs of an OR gate which has its output connected to a reset input of the second flipflop.