From: "Alexandre Devaure" <Alexandre DOT Devaure AT leroy-autom DOT com>
Newsgroups: comp.os.msdos.djgpp,gnu.gcc.help
References: <39104272 DOT D461E8D8 AT vvm DOT com> <39106CCF DOT 19C26C1E AT unx DOT sas DOT com> <39119F7F DOT 2AFDA7E2 AT vvm DOT com>
Subject: Re: embedded 16 bit, real mode, x86 target for gcc?
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Date: Fri, 05 May 2000 13:46:47 GMT
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Karl Rasmussen <karl AT vvm DOT com> a écrit dans le message :
39119F7F DOT 2AFDA7E2 AT vvm DOT com...
> Brian Dean wrote:
> >
> > Karl Rasmussen wrote:
> > > [need to generate 16 bit code from C]
> >
> >         asm(".code16");
> >
>
> Brian,
>
> Thanks for the reply. I had passed over this as only for inline asm.
> When I tried this with a C file it did not work, I got assembler errors
> complaining that
> movb %al,-5(%ebp)
> ...
>
> etc., were not valid 16 bit base/index expressions (accessing a local).
> Did I miss something else?

%ebp is a 32bit register ;)

> This line was generated to store a byte into a local unsigned char, so I
> don't think its a case of needing to rewrite my example (ie. I'm not
> using long's).
>
> Thanks,
>
> Karl Rasmussen
> karl AT vvm DOT com

Alex