Abstract: A multi-processor system having mirrored memory units accessible by either processor. The term "mirrored memory" in the context of the present invention describes the ability of each of the processors to directly READ and WRITE the contents of its own local random access memory (RAM) unit and in the local RAM unit of the other, remote processor. The mirrored memory of the present invention comprises two units of triple-ported RAM, each unit interconnected by a pair of interprocessor busses to the corresponding triple-ported RAM of the remote processor. "Triple-porting" describes the three input/output ports available for accessing a RAM unit. An internal port is used by a processor to access its local RAM, while the other two ports are provided so that the same RAM can be accessed by the remote processor through the paired interprocessor busses. Each processor may READ or WRITE its own local RAM, the remote processor's RAM, or both RAM's during a single operation.