This utility was written by Istvan Pataki (deity@sch.bme.hu).

novert.com is a terminate-and-stay-resident program,
for the purpose to turn off vertical movement of the
mouse in DOS-based games (DOOM especially).

Usage:
Type "novert" in DOS or a DOS window for turning it on,
and type "novert /u" to turn it off.

If you encounter any bugs/weird behaviour, you can
contact the author at his email address.