I recently bought a TI-89 Titanium, and I need help downloading assembly programs. I have some assembly programs on my calculator right now, but I cannot get them to run. I searched everywhere on the official website, and eventually found out that I need something called a "shell," or "kernel." So I downloaded several of these onto my calculator. I cannot get these to run, either. When I go to the VAR-LINK screen, go to the program, and hit enter, it just takes me to the APPS screen, and nothing happens. The same thing happens when I try to run other, non-kernel assembly programs. So... does anyone know how I can solve this problem and get my assembly programs to run?