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I had a problem with my atlas decoder (DMD) reset to factory settings, the train is now running properly, except I now have no directional lighting. I reviewed my decoder manual and lighting appears to be programmed in CV 29, however there are bits 0-7. Can someone expain to me how to program...

I have an atlasmaster commander and a ho b40-8 locomotive. I screwed around with the parameters and now I can't get the train to run. Does anyone have the parameters for this locomotive or any suggestions?