Quote Originally Posted by Jonathan View Post
It really is not hard to make a reliable breakout board. I designed/made some a few years ago with optoisolation on the I/O since it was before I got the isolated drivers. Simple to not have isolation one outputs...

How fast do you need the inputs?
still a little uncertain so advice will be grateful. from what i remember, parallel ports struggle much above around 330KHz. unless you know otherwise.