VMIOD
This VxD displays data going in and out of a specified I/O port.
You have to have a secondary monitor on your system to use this
VxD. To install this, you need to put the following lines in
the [386Enh] section of your SYSTEM.INI file:
DebugMono=TRUE
VMIOD_Port=nnnn
device=vmiod.386
where nnnn is the hex I/O port number to monitor.
The technique use will only work for UNTRAPPED I/O ports. Most of
the hardware devices that Windows knows about (keyboard, timer,
video) are trapped ports, and thus can not be monitored by this
VxD. But for a simple demonstration of this program, try 3F5, a
floppy controller port. This port was untrapped in the retail
release of Windows 3.0 and 3.1.
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