usermode access to I/O ports on XP

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usermode access to I/O ports on XP

Original Message

Name: Rudy
Date: September 18, 2003 at 14:56:04 Pacific
Subject: usermode access to I/O ports on XP
OS: XP home
CPU/Ram: 256 MB

Comment:

Microsoft has for security reasons prohibited usermode access to I/O ports on NT based platforms. UserPort.sys is a kernel mode driver for Windows NT/2000/XP Prothat gives usermode programs access to I/O ports. This makes it possible to access hardware directly from a normal executable in the same way as under Windows 95/98/ME.
Userport.sys doesn't work for XP home which is what I am trying to do. How do I access the parallel port from my program when using XP home?
Thanks

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