Date: Tue, 20 Apr 1999 12:42:01 +0300 (IDT)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender: eliz AT is
To: Mark Usher <marku AT magnet DOT at>
cc: djgpp AT delorie DOT com
Subject: Re: a complication with real mode function callback.
In-Reply-To: <7f5hap$k75$1@orudios.magnet.at>
Message-ID: <Pine.SUN.3.91.990420124140.4017A-100000@is>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Reply-To: djgpp AT delorie DOT com
X-Mailing-List: djgpp AT delorie DOT com
X-Unsubscribes-To: listserv AT delorie DOT com
Precedence: bulk


On Thu, 15 Apr 1999, Mark Usher wrote:

> How can I be sure of reserving exactly 8 bytes at the start of my event
> handler that I pass with go32_dpmi_allocate_real_mode_callback_retf ?

I have never tried anything like that, but I think this is
impossible.  The first bytes of the callback are used by the callback
code itself, and the callback is created by the DPMI server.

So the only feasible way to achieve this would be to bypass the
callback and _go32_dpmi_allocate_real_mode_callback_retf entirely, and
instead to write your own real-mode handler in assembly.