D and memory mapped devices

[Vladimir Panteleev via Digitalmars-d-learn]

On Wednesday, 14 June 2017 at 08:10:57 UTC, Russel Winder wrote:
> This would appear a priori to not allow for actual memory 
> mapped devices using it, or am I missing something?

I believe the only case where it might matter is if the device 
was sensitive to the read/write size (1/2/4 bytes). Otherwise, 
the generated code should be functionally the same as C bitfields.