 The enhancement features were implemented on additional dedicated processing modules interconnected by an Ethernet backbone with the MCU and SPU processors.The enhancement software was implemented on Intel 8080, 286 and 386 processors running on RMX.TXE4A MCUs and SPUs had been designed from the outset with provision for the addition of a communication port to interface to a back-end system, whereas TXE4 MCUs and SPUs had not.