Date: Fri, 08 Aug 1997 15:43:08 +1100
From: Bill Currie <billc AT blackmagic DOT tait DOT co DOT nz>
Subject: Re: Use of ALLEGRO and DJGPP on a 386sx?
In-reply-to: <33ea3a69.684447@news.demon.co.uk>
To: gary_cowell AT mickley DOT demon DOT co DOT uk, djgpp AT delorie DOT com
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Organization: Tait Electronics Limited
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On  7 Aug 97 at 21:22, Gary Cowell (QI'HoS wrote:
> The thing is - I am developing on my (development :))  machine but
> the target machine is a kindly donated 386sx-20 with 2mb of extended
> memory.  The question is this, will the executable run on this
> configuration with a DPMI manager??  The screen is bog standard VGA
> but im only using 640x480 16 colour anyhow.   Do i need any special
> compiler options (other than -i386) to compile this to run on the
> 386??  Does the lack of a math chip matter - does this need
> emulators/compile options to get round?? I wont be doing any
> floating point in my code, but I dont know what allegro does
> internally.

Allegro works just fine on my 386dx33 with 12M.  A bit over-specced 
compared to what you have, I know, but other than the memory, Allegro 
will work.  It's just a matter of how much memory Allegro locks 
(Shawn, help!). Allegro 1.x wouln'd work when I had 4M, but 2.x is 
better designed, so it might work with 2M if all extended memory is 
free (no disk cache or ram disk etc).

As the co-pro's etc, I believe Allegro doesn't use fp unless you tell 
it to (3d functions is one example).

Oh, and -m386 is not really needed, as -m486 and -m386 only affect 
optimisations (and alignments). Code compiled with one switch will 
work on the other cpu.

Hope this helps
Bill
--
Leave others their otherness.