 The memory address was increased from 15 to 18 bits, for a theoretical maximum memory size of 256k words.The X8 included an independent peripheral processor called CHARON (Centraal Hulporgaan Autonome Regeling Overdracht Nevenapparatuur, or Central Coprocessor Autonomous Regulation Transfer Peripherals) which handled I/O.Other features included up to 48 input/output channels designed for low speed devices such as paper tape, plotters and printers.