I have no actively looked into this at all yet.
It could be the case that the displays in the IC are driven by a separate module, which gets a standard stream of data from the DME. So in theory, if they are compatible, you can plug a complete system, dot-matrix & controller box into your non-dot matrix DME and it might work. I would love to do this
. Even if the connection to the DME is compatible, you would probably get weird formatting/data/characters because the dot-matrix controller is probably expecting different data and a different data format for the dot-matrix displays (because they display more than the non-dot matrix display).