[carguy1983]

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.

[rbanffy]

If it's really Unix-like, it should be possible to attach a VT-100 to the serial port ;-)

According to http://punix-os.blogspot.com.br/2012/03/floating-point-grays... they want to add support to PS/2 keyboards through an adapter.

This http://education.ti.com/educationportal/sites/US/productDeta... also seems like a good solution.

[mellifluousmind]

I no longer have a TI-89, but I recall there is a way to turn on text typing mode. If you want fully size keyboard, you may want to look into TI-92.