User`s guide

Chapter 4 - Setting Communication Parameters CARROLL TOUCH
4-6 Touch System Diagnostics (CTDIAG) User’s Guide
The default interrupt of 55H was selected because it does not conflict
with any known major MS-DOS software title, but any unused software
interrupt may be used.
Caution
Selecting a software interrupt is not a simple matter; it requires a
basic understanding of programming and DOS functions.