m68k port

I am interested in porting netbsd to the ti89 (and maybe ti92+) texas 
instruments graphing calculators.  The ti89 has a motorola 68000 (no FPU 
i believe) 10 MHz processor and  512 kb of memory.  Is there a simple, 
stripped down version of the kernel that i can try out for this??  I 
myself am no elite programmer; I know c++ fairly well and can do a 
little x86 asm, but have never tried 68000 asm.  Fortunately should be 
able to get some help from others in the calculator community, and 
hopefully learn a lot myself too.