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From:	rugxulo AT gmail DOT com
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: V2.04 atof() with em387.dxe not working
Date:	Fri, 21 Dec 2007 13:32:06 -0800 (PST)
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On Dec 17, 3:27 pm, "Gerrit van Niekerk" <gerri DOT  DOT  DOT  AT gpvno DOT co DOT za> wrote:
> > On 15 Dec 2007 at 9:28, rugx DOT  DOT  DOT  AT gmail DOT com wrote:
> > Can you post your example (or a simplified version at least) or even an .EXE?
>
> Here is a simple example which shows the problem. Of course you have to run it on
> a machine without a floating point unit by setting emu387:

Confirmed. I tested on both a P166 under pure DR-DOS 7.03 (had to "set
387=n" first) and a 486 Sx/25 under pure MS-DOS 6.22. For whatever
reason, running under DOSBox 0.72 or Win XP or Vista doesn't respect
the "387=n" environment setting. (Oh, and I linked with -lemu or -
lwmemu for the below binaries. Plus, I UPX'd 'em, if you're curious.)

------------------------------------------------------------------------------------------------
C:\TEMP\*.*

fptest   c         252                fp203emu exe       41,380
fp204emu exe       47,000             fp204wm  exe       52,236

[ MS-DOS ] Fri 12-21-2007>fp203emu
String 1.23 Floating value 1.230000

[ MS-DOS ] Fri 12-21-2007>fp204emu
String 1.23 Floating value 0.000000

[ MS-DOS ] Fri 12-21-2007>fp204wm
String 1.23 Floating value 1.230000

[ MS-DOS ] Fri 12-21-2007>scrndump a:\fp-486.txt
------------------------------------------------------------------------------------------------
D:\TEMP\*.*

.                  (DIR)              ..                 (DIR)
fptest   c         252                fp203emu exe       41,380
fp204emu exe       47,000             fp204wm  exe       52,236

[ DR-DOS ] Thu 12-20-2007>set 387=n

[ DR-DOS ] Thu 12-20-2007>fp203emu
String 1.23 Floating value 1.230000

[ DR-DOS ] Thu 12-20-2007>fp204emu
String 1.23 Floating value 0.000000

[ DR-DOS ] Thu 12-20-2007>fp204wm
String 1.23 Floating value 1.230000

[ DR-DOS ] Thu 12-20-2007>scrndump a:\fp-p166.txt
------------------------------------------------------------------------------------------------

P.S. Wouldn't it be better if DJGPP.ENV set EMU387 automatically
(might save some DOS environment space??)?

Oh, and I still say it's legal to include WMEMU387.DXE without GPLing
your code, but if you're worried either make the end user download it
themselves if needed or try to find the author (W. Metzenthen) for
explicit permission. (BTW, a simple "make" doesn't work anymore, yuck.)

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