Unix-like operating system for the TI-89 and TI-92+ graphing calculators.

For reference, a TI-92+ has a 12 MHz Motorola MC68000 processor and 188 KB of RAM.

It's really interesting how calculator technology has stagnated over the years. I'm in a BC Calc class now where we are still using 89s. My teacher is aware of the nspire calculators and he frequently uses WolframAlpha but hardware wise, he still teaches off of the 89.

Can someone PLEASE make an open-source calculator? It's disgusting that TI continues to sell 20 year old hardware at a 1000% markup.

Last release was 13 months ago; if you follow the Ti calculator community (<a href="http://www.ticalc.org/" rel="nofollow">http://www.ticalc.org/</a>) you'll know this is fairly old news.

How about the old Casio PB-700 up to the PB-2000 that were programmable in Basic, C and Prolog?

I'm a long-time user of the TI-89 (through hs, college, and now for business accounting) - has anyone solved the input problem? The keypad is only good for arithmetic and symbology, typing text is pretty awful.