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using the parallel port in labview

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I'm tring to understad how out port.vi and in port.vi function on win NT. I've downloaded parallel_NT.VI on NI's site, but I cannot understand which values I've to pass to out port.vi to set high or low a specific data line. There are "and" "or" operator connected to the output of in port.vi that I would understand what they represent.
Any help will be appreciated.

Regards Perseo.
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Hi

Look at this link. Here you will find an example which uses the parallel port als DIO Port.
http://zone.ni.com/devzone/conceptd.nsf/webmain/72C6FC6CE4AD4D1386256B1800794596?opendocument

This is an interesting Link too:
http://zone.ni.com/devzone/conceptd.nsf/webmain/72C6FC6CE4AD4D1386256B1800794596?opendocument

Remember that you have to install an accesshw.dll before you can use the IN/Out Port VI's under Windows NT.

Bye
Regards,
Luca
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