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From: Brian Drummond <brian@shapes.demon.co.uk>
Newsgroups: comp.lang.ada
Subject: Re: Bootstrapping a null procedure. Seriously?!
Date: Wed, 13 Mar 2013 22:32:53 +0000 (UTC)
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Date: 2013-03-13T22:32:53+00:00
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On Tue, 12 Mar 2013 07:04:12 -0700, Diogenes wrote:

> On Tuesday, March 12, 2013 8:09:08 AM UTC-4, Brian Drummond wrote:

>> http://wiki.osdev.org/Ada_Bare_bones
>> Or see the RTS component of the AVR-Ada project on Sourceforge for
>> another minimal RTS.

> Yeah...these projects are what got me interested in doing this.
> 
> Is it actually possible to compile the nullmain.adb procedure against
> these runtimes and have it actually load on their respective platforms?

I have done so for the AVR-Ada runtime (and an experimental port to the 
Texas MSP430). The Ada main subprogram compiles down to "ret" . For the 
MSP430 version, the whole executable is about 200 bytes (mostly crt0.s, 
but including 32 bytes of interrupt vectors. The AVR-Ada project is 
further along : a complete LED flasher is about 65 bytes, of which the RTS 
is probably 50 bytes.

- Brian