dual dir output - normal and inverted

I have a mesa 7i92 in step/dir mode driving a DMM tech servo drive. I have a gantry style and do not need anything fancy for squaring. I just push gantry against stop block and then power up. That work for me.

So I plan to connect both drive to same stepgen, only issue is I need "slave" motor in reverse direction.

Is there a way to output a second dir signal inverted at .HAL level without thinkering with the .bit file ?

A second direction pin would require a different bitfile but
would not be necessary if the DMM drive has differential inputs
or the Breakout board you are using has differential outputs
as the inversion could be done by a wiring change