Neat!I think this was the one he had.
https://en.wikipedia.org/wiki/TI-30
It did a neat little power down sequence with flashing decimal points if left on unattended. Curiously, there was a small port molded into the side of the case that looked a lot like a phone jack, but nothing actually in there to connect to.

To steer this back towards Star Wars, I saw more than a few homebrew Vader costumes in the early days where the chest plate was an old calculator. 😉

Some of the more exotic calculator designs of the 70’s turned up as props on various SF shows of the era.