This is a protocol stack written to interface with the TI line of calculators on the Atmega line of microcontrollers. Currently supports the TI82, TI83, TI84, and TI89.
ASM68000 is a usefull editor to write ASM code for TI89 calculator. It is a simple IDE written in TCL/TK, so it works with the TCL/TK interpreter. You can found it at the adress www.sun.com/960710/cover/dltcl.html. I hope it will help you in your ASM prog