Will the HP48 Interface Cable (4-pin to 9-pin) require a 9-pin to serial/usb adapter?
CalculatorSource [ Admin ] from San Francisco, United States of America
http://www.calculatorsource.com/sc-hp48.html is a serial cable so if you don’t have a serial port on your computer and want to connect it to USB then you’ll need an adapter.
Please note that these cables have not been tested with adapter use. If you decide to give it a shot please update this question with your results.