> My first Ada project was using it as a PDL for micro code for a bit
> slice computer.  For those of you who don't know about them, back in the
> old TTL logic days before CMOS was king.  Many vendors made the basic
> math unit and register sets in 4 bit slices.  If you wanted a 16 bit
> computer you used 4 of them.  If you wanted a 32 bit computer you used
> 8.  And so on.  This use of Ada was very successful because it allowed
> very good definition of the data though the use of rep specs.  So the
> hardware people loved it.  The software people liked it because it allow
> us to abstract away those details.

Isn't this sort of thing part of what VHDL is about?