What kind of computer do you use in your shop?

are there any instructions on wiring ?
Ive spent a lot of money for something that doesn’t work, so far

seems by the time I learn all this ,I will be too old to care

I use that exact same one!

Which planet cnc controller do you have and what stepper drivers are you using?

Don’t have one yet

My computer is an ancient (2009?) HP small form factor system. It’s main claim to fame is that it has a parallel port which I need to run a Gecko G540 under Linuxcnc.

Ditto!