[Coco] Question regarding OS-9 Default Drive (/DD)

[Nick Marentes]

I am wondering how OS-9 handles the default drive.

I always thought that the idea behind OS-9 is that regardless of your 
OS-9 hardware, the driver maps the hardware to a software "translator" 
(my terms because I don't know the official terms yet). This is the 
default drive (/dd)?

That way, whether you have a 40trk, 80trk, drivewire, SDC etc drive, the 
application program doesn't care because it talks to this 
"software/device translator".

So, what has me wondering is why, when I look at the NitrOS-9 software 
website (http://nitros9.sourceforge.net/latest/) there are so many files 
and many are just duplicates but configured for there respective loading 
device?

Seems messy, confusing and goes against what I thought was how OS-9 works.

I would have thought that once one configures an NitrOS-9 to suit their 
setup, the single version of the application disk/s is all that is needed.

Does this mean that when a new program is added, a version of the same 
application needs to be created for each device?

Seems wrong and but I'm sure there is something I'm not understanding here.

Nick