LinuxCNC not working with new 64-bit desktop and parallel port

I wanted a more modern version than 2.7.15, mostly because the builrtn browser was so ancient that many websites refused to work with it. 2.9.8 needed a 64-bit processor. Someone gave me a 64-bit desktop. I only needed to put a PCIe parallel port in it. Okay, 2.9.8 installed in a system with gobs of RAM and SSD storage. Everything is connected as it was before but no axes move. When I run latency test, I get max jitter of 30,381 on Servo thread. 60,354 on Base Thread.

I wonder if the parallel port card is defective. How would I test that?

You could first check if your parallel port is properly installed.

The commandshould list a device with LPC Controller or LPT Controller or similar.

Searching for guidance gave me only a sensation that the parallel port might have the wrong address. Supergrok saved the day. It helped me find that the built-in parallel poets are at 0x3F8. This rang a bell from when I wrote a terminate-and-stay-resident PC-DOS (stop laughing) program that intercepted data going to the parallel port and converted Epson control codes to Postscript. It was wonderfully elegant in how it allowed programs with no Postscript support to use Apple LaserWriters

Changing one of the LinuxCNC setup files to talk to the parallel printer at 0xC010 and problem is solved.

clayton2ndtry wrote:

This rang a bell from when I wrote a terminate-and-stay-resident PC-DOS (stop laughing) program that intercepted data.

I did something similar but it trickled point of sale transactions out of a cash register to accounting software (And I got paid for it!)