hypertrem is weak ( it's for a modem and is not a useful tool ) (very limited)
I have one that i wrote 10 years ago in 80386 masm. it is better but will not support
illegal baud rates.
Terminal Software
its free too. (mostlY) (notice the very flexible display format !!!)
I did license mine so i can get the active X support.
First order, is to pluck the turkey. (hacking the ECU)