Quote Originally Posted by cncmachineguy View Post
So far I have a main that just moves porta to latc on every iteration.
Hey Bert,

I am trying to understand this better. Would you mind generalizing what it is your board is going to be doing? I take it that it is passing all of the data from porta to portc. But beyond that, I am in the dark. I guess your EMC2 program is sending stepper motor signals through the parallel port, to your board. Then your board is passing it to the stepper if it is enabled. Couldn't you just avoid passing it from one port to another, and act directly on the parallel port pins, or am I missing something?