Ports and Interfaces > Parallel Port

Pin 4 goes high automatically when one of the status pins connected to the GND!

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Rightia:
I set it to Readout-Only and I still have the problem!
Don't you have this problem with your own parallel port?

Jan Axelson:
I don't recall ever seeing this problem or anyone's posting about it here. However, I haven't used a parallel port in a while and no longer have any PCs with them.

You've done everything I can think of to keep the pin from responding.

Rightia:
Thank you so much anyway!
Still one more question:

For solving the problem you said: "Configure the data lines as outputs by writing zero to bit 5 of the control port (base address + 2)."

The program with which I am working doesn't let me change any codes there. Is there any way to configure the data lines as outputs in the registry of Windows XP?

Jan Axelson:
Output is the default state for the data lines. Unless your code or some other driver code is changing it, the lines will be outputs.

If you select Output only in the BIOS, the data lines will always function as outputs.

If you would like to describe in more detail what you are trying to accomplish with the port, we might be able to suggest the best approach.

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