I have a couple of these new and may consider using them in a project. I know they are discontinued from Parallax but none the less...
I did find the spec sheet but no code.
Thanks in advance.
I found some really old code (2012) on an old drive and to my surprise found a Parallax trackball in a parts box. I freshened the driver and demo -- it works (tested on a PAB).
Thank you Jon.