Date: Wed, 29 Dec 1999 13:10:29 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: sl <junk AT bbs DOT darktech DOT org>
cc: djgpp AT delorie DOT com
Subject: Re: VESA, DJGPP, calling far-functions
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On Wed, 29 Dec 1999, sl wrote:

> 1) Call this function which is accessible in real-mode (since its pointed to
> by a far-pointer)
> 
> 2) Control what values are in the registers right before I call this
> function?

You need to use library function __dpmi_simulate_real_mode_procedure_retf.
See section 18.5 of the FAQ for more details about related issues.