The 'TIGCC for Linux' project aims to develop a C compiler for TI Graphing Calculators based on a M68000 processor. The target can be a TI89/89Ti/TI92+/V200 calculator. A such compiler already exists under Windows but this one is for Linux users.
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