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how can i use a parllel port as digital inputs and outputs

Hi all,

 I am using Labview 8.5 to my application. i need only one digital input and one output to interface with PLC.for this i cant go for seperate DIO card. i want to use the PC Parllel port for digital inputs/outputs function. i have no idea about that. please give your suggestions.......

 

Thanks

Kalanga 

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