Date: Thu, 16 Nov 1995 08:39:29 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
To: Elmar Vogt <elmar DOT vogt AT rzmail DOT uni-erlangen DOT de>
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Re: A peculiar question: Extra Segments & DJGPP...?


On 15 Nov 1995, Elmar Vogt wrote:

> x10 asks for a pointer to the string to be displayed. Fine. Alas,
> the way I understood it, its address is given by a combination of
> Extra Segment ES and Base Pointer BP, where ES is defined in segments,
> and BP in register_in.

Read the DJGPP FAQ list (available as faq102.zip from the same place you 
get DJGPP).  It explains this issue in sections 18.1 - 18.6 and will 
guide you to several library functions which will do the job right.

(The problem is NOT whether DJGPP knows about segmentation, but rather 
that real-mode BIOS and DOS services expect ES:BP to point to a buffer in 
low memory, below 1MB mark, whereas your program's data is all above 
1MB.)