From: "Stefan Viljoen" <rylan AT intekom DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: rep stosb generates a gpf:-(
Date: Sun, 19 Sep 1999 20:01:52 +0300
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Stefan Viljoen <rylan AT intekom DOT com> wrote in message
news:7s0rvn$mbs$4 AT ctb-nnrp2 DOT saix DOT net...
>
> Nate Eldredge <neldredge AT hmc DOT edu> wrote in message
> news:37E29DEB DOT 3961CD69 AT hmc DOT edu...
> > "Santosh H." wrote:
> > >
> > > Hi,
> > >   I was trying today to port some of my graphics functions I'd written
> for
> > > borland C to DJGPP(why prot mode u knucklehead!sorry:-)).Right , So i
> have
> > > a procedure which i converted from TASM to NASM syntax.the procedure
is
> as
> > > below
> > >
> > > _Drawhorizline:

I correct myself:

> I encountered EXACTLY the same problem in converting TASM code to NASM
code.
> Stosb stores the value in al (? was it ah?) to es:di right? I broke this
> down to its components, doing something like
>
> mov [es:di],al
> inc di

The whole point of breaking down a composite instruction like stosb is to
use different segment registers... - to make a stosb breakdown useful you
need to replace ES with DS for example...

Sorry!


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