USB-LPT interface for LinuxCNC

Hi everyone.
I have built a USB-LPT adapter dedicated to use with LinuxCNC.

If you are interested, I invite you to read:
machmaker.pl/index.php?p=1_13

Yeah, I have seen it on Youtube couple of days ago. I have also seen that you published the patched source code on your website. But so far I have not had the time to study it in any depth.

Could you give the top-down run on how you are solving the USB2 specific latencies when running the real-time software loop?

Thanks.

The device uses buffering, which allows you to eliminate delays associated with the fact that USB access is not in real time. The use of buffering has a disadvantage - reading the inputs does not occur at the same time as controlling the outputs. Therefore, it is impossible to use certain commands with this device, where the state of outputs at a given moment depends exactly on the state of inputs at that moment. However, in many LinuxCNC applications, this feature does not bother at all, for example in the construction of simple CNC plotters / milling machines, laser engraving machines or plasma cutters.
Buffering also has advantages - it reduces jitter.

Do you still have these available? I would like to try one out for my machines.