What exactly does the /I option on the TINY host do?
The /I option will cause the TINY host to generate an INT 09 (the keyboard hardware interrupt) after each key is pushed into the keyboard buffer. There is an application from TeamPhone that seems to need this interrupt to tell it to wake up and read any pending keys. If you have an application that doesn’t seem to want to read the keys from TINY, you can try this option, but in general you shouldn’t need it.