From: huntercr AT cs DOT purdue DOT edu (Charles Hunter)
Subject: OS/2 + DJGPP + emu387 = big problems
To: DJGPP AT sun DOT soe DOT clarkson DOT edu (djgpp mailing list)
Date: Wed, 29 Mar 1995 10:28:23 -0500 (EST)
Cc: huntercr AT cs DOT purdue DOT edu (Charles Randolph Hunter)



Well, so much for creative subject headers.

I have just run into a strange conflict that I think has been going on 
for quite some time [ just never knew the reason before... see below ]

When I run any djgpp app or util that uses FPU instructions under OS/2,
emu387 does not work. Under DOS I would have strange crashings all the time
and it just so happens that these occur in the same place, when a coprocessor
instruction is executed. I never could figure out what was going on before
since I had nothing but a hard reset in my future under DOS but OS/2 nicely
tells me what happened. 
	My fix before was to not use DPMI, but I cannot do that under OS/2.
So what can I do?


Thanks in advance,

	Charles

------------------------------------------------------------------------------
Here's all the information:
------------------------------------------------------------------------------


i386-20sx 
ATI Mach 32 w/2MB
8 MB RAM
270 MB HDD [ FAT ]
OS/2 WARP, MSDOS 6.0 [ MDOS 5.0 ]
DJGPP 1.2m4
current versions of gcc, info,binutils etc...

******** config.sys:  ******************************************************
	[ OS/2 config.sys.. ask me for it if you want it ]
current settings for: 
	DMPI= 8MB
	EMS= 16MB
	XMS= 8MB
	DOS in high memory
	etc ...
*****************************************************************************


******** autoexec.bat ( for os/2 MDOS ):  ************************************

@ECHO OFF
ECHO.
PROMPT $p$g
PATH C:\OS2;C:\OS2\MDOS;C:\DOS;C:\DOS\LOCAL;C:\;
SET TMP=C:\TMP
\os2\mdos\doskey /INSERT
******************************************************************************

******** djgpp.bat [ my batch file for enabling djgpp settings ]  ************

@echo off
set dj=e

set DJGPP=%dj%:/djgpp/djgpp.env
set GO32TMP=c:/temp
set emu= e:/djgpp/bin/emu387
PATH = %PATH%;%dj%:\djgpp\bin;%dj%:\djgpp\include
if "%1" == "/dos" goto dos
if "%1" == "/os2" goto os2
echo autodetecting...
if exist c:\os2\system\config.dos goto os2
:dos
echo DOS DJGPP settings enabled...
set GO32=emu %dj%:\djgpp\bin\emu387 nodpmi topline 2r1 nc 256
goto e
:os2
echo OS/2 DJGPP (DPMI) settings enabled...
set GO32=emu %dj%:\djgpp\bin\emu387 2r1 nc 256
:e
***************************************************************************

******** djgpp.env:  *******************************************************

DJDIR=%:/>DJGPP%
+USER=dosuser
+TMPDIR=%DJDIR%/tmp
+GO32TMP=%DJDIR%/tmp
[bison]
BISON_HAIRY=%DJDIR%/lib/bison.hairy
BISON_SIMPLE=%DJDIR%/lib/bison.simple

[cpp]

CPLUS_INCLUDE_PATH=%/>;CPLUS_INCLUDE_PATH%%DJDIR%/cplusinc;%DJDIR%/include
C_INCLUDE_PATH=%/>;C_INCLUDE_PATH%%DJDIR%/include
OBJCPLUS_INCLUDE_PATH=%/>;OBJCPLUS_INCLUDE_PATH%%DJDIR%/include;%DJDIR%/include/objc
OBJC_INCLUDE_PATH=%/>;OBJC_INCLUDE_PATH%%DJDIR%/include;%DJDIR%/include/objc

[flex]
FLEX_SKELETON=%DJDIR%/lib/flex.skeleton

[gcc]
COMPILER_PATH=%/>;COMPILER_PATH%%DJDIR%/bin
LIBRARY_PATH=%/>;LIBRARY_PATH%%DJDIR%/lib

[info]
INFOPATH=%/>;INFOPATH%%DJDIR%/docs;%DJDIR%/docs/djgpp;%DJDIR%/docs/texinfo
*************************************************************************