Hacker News Reader

The TI-84+ graphing calculator is still popular and a current model and it is Z80 based. (Though I doubt you'll find a DIP40 socket in one for a swap.)

View on HN

The TI-84+ uses a TI REF 84PLUSB (or variant) ASIC that has a Z80-compatible core in it, not a Zilog Z80, and, as you say, definitely not a DIP40 part.

See the ASIC here, in what looks to me like a QFP-144 package: https://guide-images.cdn.ifixit.com/igi/e25cVO2avPxiMoXl.hug...

The CE also uses an ASIC, but with an eZ80 core instead.

Thank you! I had a job coding Z80 assembly "back in the day" and grew to love its instruction set so I'm not surprised there is legacy and value to keep stuffing wee Z80ish cores into modern devices.

I also found this gem just now: http://datamath.org/Album_Graph.htm

Reply on news.ycombinator.com