Article ID: Q500001
The information in this article applies to:
For Direct I/O, version 4.2 and above see article Q500003.
Normally the parallel port (LPT) is controlled by
Windows NT. Software needing direct access to the parallel ports registers
does not run properly.
Follow the steps given below to configure your system properly:
Depending on your configuration you may notice some error messages at startup stating that the device parport.sys cannot be started. This occurs in cases when you have grabbed the only parallel port built into this PC. You can get rid of these messages by changing the startup mode of these devices to Disabled.
You cannot print to a parallel port grabbed by Direct I/O. Only one device has control over a given hardware resource, either parport.sys or Direct I/O.