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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: understanding runtime support
Date: Wed, 16 May 2012 19:15:07 -0500
Organization: Jacob Sparre Andersen Research & Innovation
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Date: 2012-05-16T19:15:07-05:00
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<tmoran@acm.org> wrote in message news:jp0kbf$gvo$1@speranza.aioe.org...
>> If you insist on programming the bare metal in Ada ...
>> ...
>> The Ada run-time did not support tasking or memory deallocation, and 
>> could
>> not propagate exceptions beyond the frame that raised them.
>  RR Software had a full Ada 83 that ran on DOS.  I don't recall DOS as
> being all that far from bare metal - it was basically I/O.  And I'd be
> curious, Randy, what Windows OS features were needed for, say, Ada 95.

We use the Windows heap for memory management, rather than our own design 
that we used on MS-DOS. Otherwise, the compiler is basically the same (we 
don't use threads, for instance, so our tasking could easily run on bare 
metal; similarly, we don't use Windows exceptions, mainly because I couldn't 
find any documentation in 1998 as to how they are handled in code). So the 
Windows services used are mostly memory management and I/O.

                                  Randy.