Date: Wed, 26 Jul 1995 13:25:10 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: Philip Andrew Dunstan <dunst_pa AT ee DOT uwa DOT edu DOT au>
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: GCC hangs when EMM386 not loaded


On 25 Jul 1995, Philip Andrew Dunstan wrote:

> 
> When I run GCC (version 2.6.0) it hangs if EMM#*^.exe is not loaded. The
> problem is I want to access a framegrabber card, and I can only access it 
> correctly when EMM386.EXE is not loaded.
> 
> Any suggestions?

Yes.  The version you have had a bug in one of the library functions 
which caused exactly this behavior.  It's explained in the DJGPP FAQ list 
(available as faq102.zip from the same place you get DJGPP):

6.2   Q: When I try to compile anything, my computer either reboots or
         hangs so hard it needs a cold reboot...
      A: If you use DJGPP 1.12m3, get and install 1.12m4 maintenance
         release and the latest gcc binary distribution (gccNNNbn.zip).
         1.12m3 and gcc 2.6.3 which came with it had a bug in one of the
         library routines which would cause these problems under XMS
         driver (such as HIMEM).
         Alternatively, you could install a VCPI server like EMM386 or
         QEMM386, or work under DPMI (like Windows), because that problem
         doesn't appear in these environments.

         Several people have reported that DJGPP would not run with
         EMM386.EXE which comes with MS-DOS 5.0, but works fine with
         EMM386 from DOS 6.2x.