From:	Eric Rudd <rudd AT cyberoptics DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: DJGPP 1.x programs don't work if you get 2.0!
Date:	26 Feb 1997 16:33:52 GMT
Organization:	CyberOptics Corp
Lines:	22
Message-ID:	<5f1olg$ptr@hagar.cyberoptics.com>
References:	<Pine DOT SUN DOT 3 DOT 91 DOT 970225165745 DOT 7750E-100000 AT is>
NNTP-Posting-Host:	rudd.cyberoptics.com
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Eli Zaretskii <eliz AT is DOT elta DOT co DOT il> wrote:
>
>On 25 Feb 1997, Paul Derbyshire wrote:
>
>> I just discovered today that when DJGPP 2.0 is installed, programs written
>> with DJGPP 1.x you have on your system stop working.
>
>Not on my system.  On my system, they still work.  This problem >is caused by something specific to your configuration.

There are a couple of incompatibilities that come to mind:

1. Direct writes to the virtual linear frame buffer at 0xD0000000 
don't work any more.  There's no trivial workaround for 
this, AFAIK, due to DPMI shortcomings.

2. The stack size is no longer unlimited.  This is not a big 
problem, since you can request a bigger stack size at start-up 
with the "_stklen" global variable (see the FAQ 15.9).

-Eric Rudd
rudd AT cyberoptics DOT com

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