not sure if this is the right topic, however, I have installed a second parallel port into the computer. the drivers seem to have installed fine.
Its a rogers encoder interface. I double checked pinouts and ports & plugged it into the first parallel port, and got feedback and it worked fine.
however, it seems that no matter which address I use for the second parallel port in Mach, there is no feedback or contact with the board. I was able to tell originally that the settings were correct when the parallel port lights on the diagnostic screen lit up. but that only appears to work for the first parallel port. so has anyone else had this difficulty ? thanks.