1. A digital system for on board programming of a non-volatile memory comprising: (a) A read/write memory included within said system for storing data therein, (b) a non-volatile memory, said non-volatile memory comprised of means for programming said memory and means for writing data therein, (c) circuit means for transferring data into and out of each of said memories, said circuit means including means for generating enabling/disabling signals to said non-volatile memory and to said read/write memory during programming of said non-volatile memory, (d) timing means coupled to said non-volatile memory for generating a program pulse of predetermined duration to said non-volatile memory, (e) means for generating a program voltage signal of predetermined magnitude and applying said voltage signal to said non-volatile memory, said enabling/disabling signals, program pulse and program voltage signals being generated within said system and effecting transfer of data from said read/write memory to said non-volatile memory without removing said non-volatile memory from said system, (f) means for verifying proper programming of said non-volatile memory by the read/write memory comprising: data circuit means coupled to said memories for transmitting the data outputs from each of said memories, electrically energizable visual means coupled to said data circuit means, comparator means coupled to said data circuit means for comparing the outputs for differences between the data in the non-volatile memory and the read/write memory and energizing said visual means upon detecting any of said differences, and latching means coupled to said visual means and adapted to latch the visual means in the energized state when energized as a result of detecting any of said differences, and means to vary when said program pulse signal starts within a scan of memory whereby different portions of the memory contents can be scanned to determine the exact location of any error, and means for changing the read/write memory storage input to said comparator to a constant voltage level and comparing said non-volatile memory output to said constant voltage level to determine whether said non-volatile memory has been completely erased.