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I have installed pci parallel port card on my computer as my motherboard does not have one. The address assigned to the Port is c100 - c107 . I am unable pass this address to inpout32.dll as the dll accepts short data type.
Please help me
Sergey Alexandrovich Kryukov 20-Aug-12 14:26pm    
What are you going to use this card for? It looks like using it for a printer is unlikely. What data does not fit in "short data type"? What is exactly "short"? Your addresses are of the type ushort, only byte is shorter... :-)

1 solution

short is a 16 bit dtaatype, but it is signed - so you can't use the top bit easily, and you will get a compilation error if you try directly.
Use a ushort instead:
ushort u = 0xC106;
Console.WriteLine("{0:X}", u);
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ravi369 23-Aug-12 5:04am    

I tried ushort datatype, the parallel port is not getting detected ie. i'm not able to send any data via pci parallel port.
i am using inpout.dll from website.

Below is the code that i am using

[DllImport("Parallel Port.dll")]
private static extern void Out32(ushort PortAddress, short data);

[DllImport("Parallel Port.dll")]
private static extern short Inp32(ushort PortAddress);

private void button1_Click(object sender, EventArgs e)
ushort DataBusAddress = 0xc100;
Out32(DataBusAddress, Convert.ToInt16(Inp32(DataBusAddress) | 1));

I am running windows 7 64-bit os on my pc.

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