Parallel Port Viewer

Description:
This program allows you to view and control parallel port on hardware level.
Features:
* It is possible to change each bit in Data Register, Status Register and Control Register.
* It is possible to view and control when 5 Volts exist on the pins of parallel port DB-25 connector.
In order to use this program on Windows NT/2000/XP you need to install the driver for parallel port.
There are three steps of installation.
1. Put UserPort.sys to \WINDOWS\system32\drivers\
2. Put parport.dll to \WINDOWS\system32\
3. Run UserPort.exe. Configure as showed in the picture below, then press Update afterward press Start.
That's all.