This is a well known problem that DOS and Win16 applications
can not do port i/o operations under Windows NT/2000/XP. TVicNT16
is a standalone toolkit that enables this possibility for
your hardware dependent 16-bit applications without to be
modified.
What you can do with TVicNT16? Here is two main capabilities
of this toolkit:
enables direct port i/o operations for your original (unmodified!)
16-bit application;
allows to monitor all port i/o activity of 16-bit application;
this property may be useful if you want to discover a behavior
of some 16-bit application without having the source code.
Note: This toolkit is meant for the hardware
oriented DOS and Win16 applications under Windows NT/2000/XP
only! See our another toolkits if you are interested of hardware
access from a 32-bit application.