Abstract: A programmable signal processor having solid state components which can be programmed to duplicate the control functions of an electromechanical relay panel. The processor includes an AND memory matrix having a plurality of individual inputs and outputs which are connectible through diodes to outputs of solid state gated input memories and through jumpers to inputs of solid state gated feedback memories. The input memories have inputs which are switched by external inputs to the processor. The feedback memories are switched by outputs of the AND memory and provide input signals to the AND memory which simulate the signals provided by normally closed and normally open contacts of a relay. The outputs of the AND memory are selectively connected through wire jumpers to the inputs of the feedback memories and circuits which control the outputs of the processor so the feedback memories and output circuits of the processor will switch in response to outputs from the memory in an OR logic manner.