Looks like Y axis step, spindle relay, and a couple of other outputs don't function on one of the parallel ports but the other is fine. Switching them indicates that one of the ports is set wrong or something. Will look at the BIOS this afternoon. Thanks for the help and reassurance Brett!
What is the difference, when setting up an MPG, with using OEM code 259, 260, and 261 -etc. and using 185, 186, 187 and etc? The set-up calls for MPG #1 PORT 2 : A pin2 and B pin3. I'm getting cross talk between X and Y when in MPG mode. Could it be a dirty 5 V supply to the MPG?
Thanks,
Bill Clemens
P.S. We had this machine working fine and sorted out some mechanical tweeks during running. Needed the MPG input.... We'll send some photos of a couple of parts made with the machine and Mach3. It was working and I couldn't leave it alone!