RAM diagnostic program

The more RAM which one adds to a µP system, the more difficult it becomes to trace any faults which may occur on one of the memory boards. Think, for example, of how tedious it would be to have to step through every location of a 4 KRAM card! Fortunately, however, with the aid of the right software, we can make the microprocessor itself do all the hard work. After all, computers are supposed to be ideally suited to taking over boring and repetitive tasks from humans. The following program can be used to test any block of memory larger than ½ K and will indicate the location of any faults which exist.