The IIc modem and printer ports are completely unique in their shape...they are NOT the same as any Mac's or any other Apple II's. You can get cables from Quality Computers or Atlaz Computers. The IIc has a larger round connector with five pins...not the small 8pin connector that is standard on all Macs since the Plus and on the IIGS and the IIc+. The Mac 512K and original Mac had a DB-9 plug.