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From: Rugxulo <rugxulo AT gmail DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: /beta/bnu217b.zip won't work in pure DOS (UPX bug??)
Date: Fri, 28 Mar 2008 14:00:19 -0700 (PDT)
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Hi,

On Mar 28, 3:42 pm, Robert Riebisch <Robert DOT Riebi DOT  DOT  DOT  AT arcor DOT de> wrote:
> Rugxulo wrote:
> > it makes it harder to compile some things (e.g. latest NASM). I think
> > I'll stick with GCC 3.44, though, because newer ones seem to use a lot
> > more memory (with -O2). Besides, some old code won't easily compile
> > with 4.x.
>
> That's why I have a multi-version GCC on Windows 2000. ;-) Yes, I killed
> Ubuntu.

What for? I thought you liked it, and it worked well? What went wrong?

> > [ MS-DOS ] Wed 03-12-2008>memid
> > PMODE VCPI 1.0 EMS 4.0 XMS 3.0
>
> Did you try a clean boot?

Yes. No difference.

> > [ MS-DOS ] Wed 03-12-2008>as --version
> > Invalid Opcode at eip=7fcaa; flags=3206
> > eax=00000001 ebx=00001000 ecx=00000006 edx=00000006 esi=00123248
> > edi=00000001
> > ebp=00123288 esp=00123230 cs=a7 ds=af es=af fs=8f gs=0 ss=af
> > error=0006
>
> Does UPX use SSE? *g*http://www.delorie.com/djgpp/bugs/show.cgi?000372

I don't think so, but that would explain why it works in QEMU/Win32
(which supports SSE) and not DOSBox (486DX only). AFAICT, the only way
for GCC to use SSE is either through -msse, -mfpmath=sse, or maybe?
with -march=native. I can't test right now, but HDPMI32 automatically
turns on SSE support if available, so you could try running that first
then "as.exe --version" on your Pentium M, and see what happens.   ;-)

LZMA has been supported in UPX since 2.90 (according to their NEWS
file). And yet /current/ was packed with 2.93 "unstable" and works
yet /beta/ with 3.01 "stable" doesn't. Odd. I have no idea.