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From: "Wiktor S. (wswiktorSP AT Mpoczta DOT fm) [via djgpp AT delorie DOT com]" <djgpp AT delorie DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: secret DJGPP documents?
Date: Tue, 13 Oct 2015 18:27:12 +0200
Organization: INTERIA.PL S.A.
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Charles Sandmann wrote:

> 2) Under W95 they could not reliably get the 12MB(?) of memory they
>    needed, on a 16MB system if it had been running a while, so I
>    provided them a hack to page out other applications so they could
> lock the memory required.   It was
>    a stupid little thing about how W95 didn't follow DPMI
> expectations, frustrated
>    them for weeks (commercially they must run on 16MB system, many
>    systems were architecturally limited to 16MB at the time).   It
> took me about an hour
>    to develop a workaround.

So this is why Q1 source code is more complicated than it needs be, with 
arcane memory manager that directly talks to DPMI instead of doing simple 
malloc()...

It still compiles and works with GCC 5.2.0 + DJGPP 2.05 + CWSDPMI r7 + 
DOSBox.

-- 
Wiktor S.