Also, reportedly, the following external hardware exists:
* [[KDS Communicator 104 ]] (KDS Electronics) (1992) Reportedly: unclear if this is a "Modem" and/or a "Serial and Parallel interface" ) (or, actuallyin the latter case, [[Mini-Max Modem]]"Parallel Interface" ''might'' refer to an 8bit printer port?)
* 8bit Printer Port (Pride Utilities) ([[Pride Utilities 8bit Printer Port|details]])
* 8bit Printer Port with Dual RS232 ([[Timatic Systems]])