Re: Ada OS talk (was: ADA os talk)

["M. A. Alves" <maa@liacc.up.pt>]

On Tue, 4 Sep 2001, Marin David Condic wrote:
> Absolutely no objection. If we had an Ada kernel that could be booted off of
> a floppy into a PC and provided some rudimentary capability to load and run
> another Ada program on a single processor with a single user, then you'd
> really have something there.

Good strategy.  Now, is there a fragment of Ada that GNAT compiles into
native machine code i.e. independently of host OS?  (Then we could use
that fragment to write the boot, compile it in a working machine with the
same architecture, put it on the floppy boot sector, and use a clean
machine to test it.)  Or a fragment dependent on some host OS things but
that we can tamper with in the GNAT backend to make it independent?

Also, what is the fragment of Ada necessary and sufficient to make a full
Ada compiler/interpreter?

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