Problem writing to parallel port

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Eric - 04 Nov 2004 17:00 GMT

I want to write to parallel port to drive a device. In the code, I use run
time library function _outp() to write to D0 as following:

_outp(0x378, 0x01);

I got an exception: "privileged instruction"

Looks like it doesn't like me to write to the port directly. I'm using
WinXp/Win2000. Any ideas to write to parallel port?

Eric.

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scud - 24 Nov 2004 10:29 GMT

i think in win NT or higher OS the parallel port in 'lock' for security
reason. in order to communicate with it u need a driver to do that.

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