[Coco] HDB-DOS at 16K

[Boisy G. Pitre]

Hi Art,

I'm thinking of adding some features to HDB-DOS, but in doing so, would 
have to use the extra 8K ROM area at $E000-$FDFF.  I'm curious what 
kind of incompatibilities would something like this bring to a CoCo?  
Aside from the obvious need for a disk controller to support a 16K ROM 
size, did you find that Extended ADOS-3 suffered major compatibility 
with certain programs?

Also, are there any special considerations that one has to take into 
account with the way the CoCo 3 ROM code moves ROM into RAM?

Boisy