 The 68EC030 is a low cost version of the 68030, the difference between the two being that the 68EC030 omits the on-chip memory management unit (MMU) and is thus essentially an upgraded 68020.The 68EC030 was used as the CPU for the low-cost model of the Amiga 4000, and on a number of CPU accelerator cards for the Commodore Amiga line of computers.It was also used in the Cisco Systems 2500 Series router, a small-to-medium enterprise computer internetworking appliance.