COMPONENTS INCLUDE 2 RS-232C SERIAL COMM PORTS; 2 EIA STANDARD RS-485/RS-422-A COMM PORTS; 1 FULLY IMPLEMENTED 8255 24 BIT I/0 PORT; STANDARD FLOPPY DRIVE INTERFACE CAPABLE OF HANDLING BOTH LOW DENSITY AND HIGH DENSITY ON EITHER 5-1/4 IN. OR 3-1/2 IN MEDIA FORMATS; 1 STANDARD PARALLEL PORT