Connecting old TI-89 to computer

[plmi]

I have the "old" TI-89 (no titanium) and it has 2,5 mm plug. Is it possible to connect the calculator to the computer via USB? I have a cable that came with the calculator, but it's connected to the serial port and my computer hasn't that on it. I have an serial-to-usb adaptor, but I haven't managed to get it working.

 

[rfdave]

this is what you need

https://www.amazon.com/dp/B00006BXBS/?tag=pfamazon01-20