Hello, the following video shows you the crash of the relay CPU...and explains the reason for the crash. I thought that the bad wiring of the system was the reason for the crash, but in reality there are 2 reasons...a) a SW bug in the arduino software, I used pow(x,y) to calculate the adress delivered by the relay CPU, this did not work as I expected and b) some timing problems in the memory module (I am still fighting a little bit with the timing, but I will explain this in a later video).