I would like a simple way to simulate on the parallel port, signals from Mach that would enable the charge pump and exercise one axis. 

The purpose is to have an output signal for testing that is known to be free of errors that may be caused by some kind of setup problem or other issue within Mach. 

Has anyone got anything available like this?

Thx
Scott Kelley

Use a MPG connected direct to the BOBs PP input?
Hood