Model Railroading > help identifying old digitrax decoders

Hi,

I have four old digitrax decoders out of atlas units i bought them 10 plus years ago. They are n scale replacement boards for atlas units. Im trying to figure out what type they are but cant figure it out!! The only markings on them are 46R1 with a AI circled. They all work fine, but id like to figure out if they support programming cvs 02,05,06 and how to do so?

Any help is greatly appreciated! !

Thanks Scott

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