Windows NT Incorrectly Handles Dongle SupportArticle ID: Q143126Creation Date: 13-NOV-1996 Revision Date: 14-NOV-1996
The information in this article applies to:
SYMPTOMS
An application that uses a third-party parallel port device known as a
dongle will fail to function properly on Windows NT 4.0.
CAUSE
Windows NT 4.0 incorrectly handles initialization of the parallel ports,
keeping third-party virtual device drivers from trapping any I/O. This
problem only occurs when Windows NT runs on an Intel x86 or compatible
system.
RESOLUTION
Microsoft has updated Ntvdm.exe to correct the problem.
This update is available from Microsoft support channels or directly from
the following Internet location:
ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa/nt40/ hotfixes-postSP1/ntvdm-fixSTATUS Microsoft has confirmed this to be a problem in Windows NT version 4.0. A supported fix is now available, but is not fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the service pack release containing this fix. Contact Microsoft Technical Support for more information on the availability of this fix. |
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