Transfer files between HP-71b/PC and then to HP-75c

[rprosperi]

(07-08-2018 08:10 AM)coitboy2000 Wrote:  3. I have a 15 pin female ended (both ends) null model cable; one end connected to the end of the USB to serial cable; the other end to a simple 15pin to 25pin adapter which is connected to the HP-82164A.

I assume these are normal 9-pin connectors? Serial ports are typically 9- or 25- pin; 15-pin connectors (same size d-shell as 9-pin) are for video/VGA.