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Thanks a lot cmorley!!! Great Help. Definitely I must study that doc. It has part of what I am looking for.

The last 3 questions I have is: I download from the github a copy of Linuxcnc to a folder in my pc. 1) Then I saw it says in that page: "There are several builtin HAL panels available. In a terminal type qtvcp list to see a list." => If I open a terminal and type this nothing happens 2) How do I start building my Qtvcp ? and 3) How do I start my linuxcnc version instead of the preconfigured version?
I think that maybe part of what I am asking is on linuxcnc.org/docs/html/gui/qtvcp.html#sec:qtvcp-overview suggested page by Hastrh2o
 
Thanks a lot,

Thanks Rod I had seen your post on that subject earlier.
Now I have been banging my head on setting up NPN NC induct prox switches and one of my concerns is that maybe the parport is faulty or not configured right.
The par port tester in the wiki is broken page 404 not found for the files.
Fortunately I found Big John T's file and script here.
forum.linuxcnc.org/18-computer/4743-parallel-port-tester#4743