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From: ppaatt AT aol DOT com (Pat LaVarre)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: even ordinary .exe .com .sys rebuilt by djgpp
Date: 15 Mar 2004 07:59:04 -0800
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To: djgpp AT delorie DOT com
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> Experience has shown that DJGPP programs tend to be faster than 16-bit
> programs.

xCB is the real-mode RETF instruction I remember of x86 machine code.

Can I easily call that instruction from a loop in DJGPP, to measure
the actual time cost to me of frequently switching between real and
protected mode?  That would accurately simulate what I actually want
to do i.e. call back into Dos 16-bit real-mode .sys drivers to move
bytes.

> > Can djgpp build ordinary .exe and .com and .sys?
> 
> In general, no.  Why would you want to?  ;-)

Hi.  My next reason is that I was again today pinged with a request to
translate to DJGPP what I have previously released as gratis TCC +
massively distributed Debug.exe asm:

http://members.aol.com/plscsi/

Pat LaVarre
P.S. Sorry the net somehow lost my first prompt reply.