Lucas,

direct access to the hardware is barred when running under XP (and many
other operating systems). You have to either:

1/ Write a Kernel mode device driver to access the port on you behalf,
and present an API to the APP

2/ Mess with the IOPM (IO Protection Mask) to allow a non-kernel mode
program (your application) to access the hardware

3/ Download a program that messes with the IOPM for you

                        HINT: Option 3 is best!

Google for IOPM or PORTTALK or USERPORT and the solution will present
itself.

Regards, Peter Moreton




> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Lucas Hartmann
> Sent: 16 January 2004 20:52
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [OT:] Paralel Port Control Under Windows XP
>
>
> Hello,
>
> I'm desining a small application that connects the
> PIC18F452's PSP module to
> an EPP paralel port.
>
> How do I set the port to work in EPP mode and how do I
> send/receive data
> from the port? I'm using Borland C++ Builder 6.
>
> I'd rather solving this via API calls than using third party
> components.
>
> Serial port is well doccumented in the compiler, but I've
> found nothing
> about paralel port under the compiler help and in MSDN.
>
> Thanks,
> Lucas Hartmann
>
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