ELECTRONIC PARKING METER OPERATING SYSTEM

摘要

An electronic parking meter operating system comprising a microprocessor mou nted within a meter housing, a semiconductor disc memory having at least 8K memor y bytes, and a plurality of programs stored in the disc memory. A meter event such as the d eposit of a coin will cause interrogation of an auxiliary program module map to determine if one of the plurality of programs should be used to substitute for or augment a program which is p rovided in the microprocessor to normally carry out meter functions. If substitution or aug mentation is called for, an address table in the memory disc is used to locate the selected prog ram, to load it into the microprocessor, and to execute the program.