An interesting thought, but the PDF manual you linked shows the PX-8 serial port (pp16-17) is 8-pin mini-DIN. This is what the connector on these looks like, including the metal "bar" at the top: https://commons.wikimedia.org/wiki/File:MiniDIN-9_Diagram.svg -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser(a)floodgap.com -- If you use Arabic numerals, THE TERRORISTS WIN -----------------------------

Psion bought my former employer, Teklogix, Inc., of Mississauga, ON., to provide early wireless connectivity for industrial warehouse and inventory control. I wouldn't mind betting some of its products were found attached to Teklogix wireless devices!  (This is all before 802.11 etc) cheers, Nigel Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU Amateur Radio, the origin of the open-source concept! Skype: TILBURY2591 On 2022-09-16 12:31, Tony Duell via cctalk wrote: >>> Possibly to an Epson PX-8. >> An interesting thought, but the PDF manual you linked shows the PX-8 serial >> port (pp16-17) is 8-pin mini-DIN. > There was an obscure UK computer made by Psion, the MC400 or something > like that, and I sort-of remember it had an odd serial connector, > possibly a 9 pin mini-DIN. But I am not sure it ever made it across > the Pond. > > -tony