Date: Tue, 6 Jun 1995 08:17:31 +0300
From: eliz AT is DOT elta DOT co DOT il (Eli Zaretskii)
To: jimh AT minerva DOT cis DOT yale DOT edu
Subject: Re: Graphics
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu

> You need to call GrSetMode() to initialize the extender.  Once this is
> done, the paging hardware is active for that memory, and *then* you
> can just poke values in.  The support is in hardware, not software, so
> it doesn't affect your programming, but it does require
> initialization.

Please note (and the DJGPP FAQ list says this also) that this direct screen
poking will be disallowed in the version 2 of DJGPP, due out soon.  So you
will be much better off using the farptr functions right from the onset.